Merge branch 'master' into tsbuild

Gulpfile.js

@@ -11,6 +11,7 @@ const concat = require("gulp-concat");
 const clone = require("gulp-clone");
 const newer = require("gulp-newer");
 const tsc = require("gulp-typescript");
+const tsc_oop = require("./scripts/build/gulp-typescript-oop");
 const insert = require("gulp-insert");
 const sourcemaps = require("gulp-sourcemaps");
 const Q = require("q");
@@ -412,6 +413,10 @@ function prependCopyright(outputCopyright = !useDebugMode) {
     return insert.prepend(outputCopyright ? (copyrightContent || (copyrightContent = fs.readFileSync(copyright).toString())) : "");
 }
 
+function getCompilerPath(useBuiltCompiler) {
+    return useBuiltCompiler ? "./built/local/typescript.js" : "./lib/typescript.js";
+}
+
 gulp.task(builtLocalCompiler, /*help*/ false, [servicesFile], () => {
     const localCompilerProject = tsc.createProject("src/compiler/tsconfig.json", getCompilerSettings({}, /*useBuiltCompiler*/ true));
     return localCompilerProject.src()
@@ -424,7 +429,7 @@ gulp.task(builtLocalCompiler, /*help*/ false, [servicesFile], () => {
 });
 
 gulp.task(servicesFile, /*help*/ false, ["lib", "generate-diagnostics"], () => {
-    const servicesProject = tsc.createProject("src/services/tsconfig.json", getCompilerSettings({ removeComments: false }, /*useBuiltCompiler*/ false));
+    const servicesProject = tsc_oop.createProject("src/services/tsconfig.json", getCompilerSettings({ removeComments: false }), { typescript: getCompilerPath(/*useBuiltCompiler*/ false) });
     const {js, dts} = servicesProject.src()
         .pipe(newer(servicesFile))
         .pipe(sourcemaps.init())
@@ -499,7 +504,7 @@ const tsserverLibraryFile = path.join(builtLocalDirectory, "tsserverlibrary.js")
 const tsserverLibraryDefinitionFile = path.join(builtLocalDirectory, "tsserverlibrary.d.ts");
 
 gulp.task(tsserverLibraryFile, /*help*/ false, [servicesFile, typesMapJson], (done) => {
-    const serverLibraryProject = tsc.createProject("src/server/tsconfig.library.json", getCompilerSettings({ removeComments: false }, /*useBuiltCompiler*/ true));
+    const serverLibraryProject = tsc_oop.createProject("src/server/tsconfig.library.json", getCompilerSettings({ removeComments: false }), { typescript: getCompilerPath(/*useBuiltCompiler*/ true) });
     /** @type {{ js: NodeJS.ReadableStream, dts: NodeJS.ReadableStream }} */
     const {js, dts} = serverLibraryProject.src()
         .pipe(sourcemaps.init())
@@ -590,7 +595,7 @@ gulp.task("LKG", "Makes a new LKG out of the built js files", ["clean", "dontUse
 // Task to build the tests infrastructure using the built compiler
 const run = path.join(builtLocalDirectory, "run.js");
 gulp.task(run, /*help*/ false, [servicesFile, tsserverLibraryFile], () => {
-    const testProject = tsc.createProject("src/harness/tsconfig.json", getCompilerSettings({}, /*useBuiltCompiler*/ true));
+    const testProject = tsc_oop.createProject("src/harness/tsconfig.json", getCompilerSettings({}), { typescript: getCompilerPath(/*useBuiltCompiler*/ true) });
     return testProject.src()
         .pipe(newer(run))
         .pipe(sourcemaps.init())

ThirdPartyNoticeText.txt

@@ -1,18 +1,9 @@
 /*!----------------- TypeScript ThirdPartyNotices -------------------------------------------------------
 
-The TypeScript software is based on or incorporates material and code from the projects listed below
-(collectively "Third Party Code"). Microsoft is not the original author of the
-Third Party Code. The original copyright notice and the license, under which
-Microsoft received such Third Party Code, are set forth below. Such license and
-notices are provided for informational purposes only. Microsoft licenses the Third
-Party Code to you under the terms of the Apache 2.0 License.
-All Third Party Code licensed by Microsoft under the Apache License, Version 2.0 (the "License"); you
-may not use this file except in compliance with the License. You may obtain a copy
-of the License at http://www.apache.org/licenses/LICENSE-2.0
+The TypeScript software is based on or incorporates material and code from the projects listed below (collectively "Third Party Code"). Microsoft is not the original author of the Third Party Code. The original copyright notice and the license, under which Microsoft received such Third Party Code, are set forth below. Such license and notices are provided for informational purposes only. Microsoft licenses the Third Party Code to you under the terms of the Apache 2.0 License.
+All Third Party Code licensed by Microsoft under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
-EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR
-CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR NON-INFRINGEMENT.
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR NON-INFRINGEMENT.
 
 See the Apache Version 2.0 License for specific language governing permissions and
 limitations under the License.
@@ -23,13 +14,13 @@ Third Party Code Components
 ------------------- DefinitelyTyped --------------------
 This file is based on or incorporates material from the projects listed below (collectively "Third Party Code"). Microsoft is not the original author of the Third Party Code. The original copyright notice and the license, under which Microsoft received such Third Party Code, are set forth below. Such licenses and notices are provided for informational purposes only. Microsoft, not the third party, licenses the Third Party Code to you under the terms set forth in the EULA for the Microsoft Product. Microsoft reserves all other rights not expressly granted under this agreement, whether by implication, estoppel or otherwise.
 DefinitelyTyped
-This project is licensed under the MIT license.
-Copyrights are respective of each contributor listed at the beginning of each definition file.
-Provided for Informational Purposes Only
+This project is licensed under the MIT license. Copyrights are respective of each contributor listed at the beginning of each definition file. Provided for Informational Purposes Only
 
 MIT License
 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ""Software""), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 --------------------------------------------------------------------------------------
 
@@ -91,6 +82,92 @@ Except as contained in this notice, the name of a copyright holder
 shall not be used in advertising or otherwise to promote the sale,
 use or other dealings in these Data Files or Software without prior
 written authorization of the copyright holder.
---------------------------------------------------------------------------------------
+-------------------------------------------------------------------------------------
+
+-------------------Document Object Model-----------------------------
+DOM 
+
+W3C License
+This work is being provided by the copyright holders under the following license.
+By obtaining and/or copying this work, you (the licensee) agree that you have read, understood, and will comply with the following terms and conditions.
+Permission to copy, modify, and distribute this work, with or without modification, for any purpose and without fee or royalty is hereby granted, provided that you include the following 
+on ALL copies of the work or portions thereof, including modifications:
+* The full text of this NOTICE in a location viewable to users of the redistributed or derivative work.
+* Any pre-existing intellectual property disclaimers, notices, or terms and conditions. If none exist, the W3C Software and Document Short Notice should be included.
+* Notice of any changes or modifications, through a copyright statement on the new code or document such as "This software or document includes material copied from or derived 
+from [title and URI of the W3C document]. Copyright © [YEAR] W3C® (MIT, ERCIM, Keio, Beihang)." 
+Disclaimers
+THIS WORK IS PROVIDED "AS IS," AND COPYRIGHT HOLDERS MAKE NO REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, WARRANTIES OF MERCHANTABILITY OR 
+FITNESS FOR ANY PARTICULAR PURPOSE OR THAT THE USE OF THE SOFTWARE OR DOCUMENT WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS.
+COPYRIGHT HOLDERS WILL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF ANY USE OF THE SOFTWARE OR DOCUMENT.
+The name and trademarks of copyright holders may NOT be used in advertising or publicity pertaining to the work without specific, written prior permission. 
+Title to copyright in this work will at all times remain with copyright holders.
+
+---------
+
+DOM
+Copyright © 2018 WHATWG (Apple, Google, Mozilla, Microsoft). This work is licensed under a Creative Commons Attribution 4.0 International License: Attribution 4.0 International 
+======================================================================= 
+Creative Commons Corporation ("Creative Commons") is not a law firm and does not provide legal services or legal advice. Distribution of Creative Commons public licenses does not create a lawyer-client or other relationship. Creative Commons makes its licenses and related information available on an "as-is" basis. Creative Commons gives no warranties regarding its licenses, any material licensed under their terms and conditions, or any related information. Creative Commons disclaims all liability for damages resulting from their use to the fullest extent possible. Using Creative Commons Public Licenses Creative Commons public licenses provide a standard set of terms and conditions that creators and other rights holders may use to share original works of authorship and other material subject to copyright and certain other rights specified in the public license below. The following considerations are for informational purposes only, are not exhaustive, and do not form part of our licenses. Considerations for licensors: Our public licenses are intended for use by those authorized to give the public permission to use material in ways otherwise restricted by copyright and certain other rights. Our licenses are irrevocable. Licensors should read and understand the terms and conditions of the license they choose before applying it. Licensors should also secure all rights necessary before applying our licenses so that the public can reuse the material as expected. Licensors should clearly mark any material not subject to the license. This includes other CC- licensed material, or material used under an exception or limitation to copyright. More considerations for licensors:
+
+wiki.creativecommons.org/Considerations_for_licensors Considerations for the public: By using one of our public licenses, a licensor grants the public permission to use the licensed material under specified terms and conditions. If the licensor's permission is not necessary for any reason--for example, because of any applicable exception or limitation to copyright--then that use is not regulated by the license. Our licenses grant only permissions under copyright and certain other rights that a licensor has authority to grant. Use of the licensed material may still be restricted for other reasons, including because others have copyright or other rights in the material. A licensor may make special requests, such as asking that all changes be marked or described. Although not required by our licenses, you are encouraged to respect those requests where reasonable. More_considerations for the public: wiki.creativecommons.org/Considerations_for_licensees ======================================================================= 
+Creative Commons Attribution 4.0 International Public License By exercising the Licensed Rights (defined below), You accept and agree to be bound by the terms and conditions of this Creative Commons Attribution 4.0 International Public License ("Public License"). To the extent this Public License may be interpreted as a contract, You are granted the Licensed Rights in consideration of Your acceptance of these terms and conditions, and the Licensor grants You such rights in consideration of benefits the Licensor receives from making the Licensed Material available under these terms and conditions. Section 1 -- Definitions. a. Adapted Material means material subject to Copyright and Similar Rights that is derived from or based upon the Licensed Material and in which the Licensed Material is translated, altered, arranged, transformed, or otherwise modified in a manner requiring permission under the Copyright and Similar Rights held by the Licensor. For purposes of this Public License, where the Licensed Material is a musical work, performance, or sound recording, Adapted Material is always produced where the Licensed Material is synched in timed relation with a moving image. b. Adapter's License means the license You apply to Your Copyright and Similar Rights in Your contributions to Adapted Material in accordance with the terms and conditions of this Public License. c. Copyright and Similar Rights means copyright and/or similar rights closely related to copyright including, without limitation, performance, broadcast, sound recording, and Sui Generis Database Rights, without regard to how the rights are labeled or categorized. For purposes of this Public License, the rights specified in Section 2(b)(1)-(2) are not Copyright and Similar Rights. d. Effective Technological Measures means those measures that, in the absence of proper authority, may not be circumvented under laws fulfilling obligations under Article 11 of the WIPO Copyright Treaty adopted on December 20, 1996, and/or similar international agreements. e. Exceptions and Limitations means fair use, fair dealing, and/or any other exception or limitation to Copyright and Similar Rights that applies to Your use of the Licensed Material. f. Licensed Material means the artistic or literary work, database, or other material to which the Licensor applied this Public License. g. Licensed Rights means the rights granted to You subject to the terms and conditions of this Public License, which are limited to all Copyright and Similar Rights that apply to Your use of the Licensed Material and that the Licensor has authority to license. h. Licensor means the individual(s) or entity(ies) granting rights under this Public License. i. Share means to provide material to the public by any means or process that requires permission under the Licensed Rights, such as reproduction, public display, public performance, distribution, dissemination, communication, or importation, and to make material available to the public including in ways that members of the public may access the material from a place and at a time individually chosen by them. j. Sui Generis Database Rights means rights other than copyright resulting from Directive 96/9/EC of the European Parliament and of the Council of 11 March 1996 on the legal protection of databases, as amended and/or succeeded, as well as other essentially equivalent rights anywhere in the world. k. You means the individual or entity exercising the Licensed Rights under this Public License. Your has a corresponding meaning. Section 2 -- Scope. a. License grant. 1. Subject to the terms and conditions of this Public License, the Licensor hereby grants You a worldwide, royalty-free, non-sublicensable, non-exclusive, irrevocable license to exercise the Licensed Rights in the Licensed Material to: a. reproduce and Share the Licensed Material, in whole or in part; and b. produce, reproduce, and Share Adapted Material. 2. Exceptions and Limitations. For the avoidance of doubt, where Exceptions and Limitations apply to Your use, this Public License does not apply, and You do not need to comply with its terms and conditions. 3. Term. The term of this Public License is specified in Section 6(a). 4. Media and formats; technical modifications allowed. The Licensor authorizes You to exercise the Licensed Rights in all media and formats whether now known or hereafter created, and to make technical modifications necessary to do so. The Licensor waives and/or agrees not to assert any right or authority to forbid You from making technical modifications necessary to exercise the Licensed Rights, including technical modifications necessary to circumvent Effective Technological Measures. For purposes of this Public License, simply making modifications authorized by this Section 2(a) (4) never produces Adapted Material. 5. Downstream recipients. a. Offer from the Licensor -- Licensed Material. Every recipient of the Licensed Material automatically receivLine truncated
+
+--------------------------------------------------------------------------------
+
+----------------------Web Background Synchronization------------------------------
+
+Web Background Synchronization Specification
+Portions of spec © by W3C
+
+W3C Community Final Specification Agreement 
+To secure commitments from participants for the full text of a Community or Business Group Report, the group may call for voluntary commitments to the following terms; a "summary" is 
+available. See also the related "W3C Community Contributor License Agreement".
+1. The Purpose of this Agreement.
+This Agreement sets forth the terms under which I make certain copyright and patent rights available to you for your implementation of the Specification. 
+Any other capitalized terms not specifically defined herein have the same meaning as those terms have in the "W3C Patent Policy", and if not defined there, in the "W3C Process Document".
+2. Copyrights. 
+2.1. Copyright Grant. I grant to you a perpetual (for the duration of the applicable copyright), worldwide, non-exclusive, no-charge, royalty-free, copyright license, without any obligation for accounting to me, to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, distribute, and implement the Specification to the full extent of my copyright interest in the Specification. 
+2.2. Attribution. As a condition of the copyright grant, you must include an attribution to the Specification in any derivative work you make based on the Specification. That attribution must include, at minimum, the Specification name and version number.
+3. Patents. 
+3.1. Patent Licensing Commitment. I agree to license my Essential Claims under the W3C Community RF Licensing Requirements. This requirement includes Essential Claims that I own and any that I have the right to license without obligation of payment or other consideration to an unrelated third party. W3C Community RF Licensing Requirements obligations made concerning the Specification and described in this policy are binding on me for the life of the patents in question and encumber the patents containing Essential Claims, regardless of changes in participation status or W3C Membership. I also agree to license my Essential Claims under the W3C Community RF Licensing Requirements in derivative works of the Specification so long as all normative portions of the Specification are maintained and that this licensing commitment does not extend to any portion of the derivative work that was not included in the Specification.
+3.2. Optional, Additional Patent Grant. In addition to the provisions of Section 3.1, I may also, at my option, make certain intellectual property rights infringed by implementations of the Specification, including Essential Claims, available by providing those terms via the W3C Web site.
+4. No Other Rights. Except as specifically set forth in this Agreement, no other express or implied patent, trademark, copyright, or other property rights are granted under this Agreement, including by implication, waiver, or estoppel.
+5. Antitrust Compliance. I acknowledge that I may compete with other participants, that I am under no obligation to implement the Specification, that each participant is free to develop competing technologies and standards, and that each party is free to license its patent rights to third parties, including for the purpose of enabling competing technologies and standards.
+6. Non-Circumvention. I agree that I will not intentionally take or willfully assist any third party to take any action for the purpose of circumventing my obligations under this Agreement.
+7. Transition to W3C Recommendation Track. The Specification developed by the Project may transition to the W3C Recommendation Track. The W3C Team is responsible for notifying me that a Corresponding Working Group has been chartered. I have no obligation to join the Corresponding Working Group. If the Specification developed by the Project transitions to the W3C Recommendation Track, the following terms apply: 
+7.1. If I join the Corresponding Working Group. If I join the Corresponding Working Group, I will be subject to all W3C rules, obligations, licensing commitments, and policies that govern that Corresponding Working Group.
+7.2. If I Do Not Join the Corresponding Working Group. 
+7.2.1. Licensing Obligations to Resulting Specification. If I do not join the Corresponding Working Group, I agree to offer patent licenses according to the W3C Royalty-Free licensing requirements described in Section 5 of the W3C Patent Policy for the portions of the Specification included in the resulting Recommendation. This licensing commitment does not extend to any portion of an implementation of the Recommendation that was not included in the Specification. This licensing commitment may not be revoked but may be modified through the exclusion process defined in Section 4 of the W3C Patent Policy. I am not required to join the Corresponding Working Group to exclude patents from the W3C Royalty-Free licensing commitment, but must otherwise follow the normal exclusion procedures defined by the W3C Patent Policy. The W3C Team will notify me of any Call for Exclusion in the Corresponding Working Group as set forth in Section 4.5 of the W3C Patent Policy.
+7.2.2. No Disclosure Obligation. If I do not join the Corresponding Working Group, I have no patent disclosure obligations outside of those set forth in Section 6 of the W3C Patent Policy.
+8. Conflict of Interest. I will disclose significant relationships when those relationships might reasonably be perceived as creating a conflict of interest with my role. I will notify W3C of any change in my affiliation using W3C-provided mechanisms.
+9. Representations, Warranties and Disclaimers. I represent and warrant that I am legally entitled to grant the rights and promises set forth in this Agreement. IN ALL OTHER RESPECTS THE SPECIFICATION IS PROVIDED “AS IS.” The entire risk as to implementing or otherwise using the Specification is assumed by the implementer and user. Except as stated herein, I expressly disclaim any warranties (express, implied, or otherwise), including implied warranties of merchantability, non-infringement, fitness for a particular purpose, or title, related to the Specification. IN NO EVENT WILL ANY PARTY BE LIABLE TO ANY OTHER PARTY FOR LOST PROFITS OR ANY FORM OF INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OF ANY CHARACTER FROM ANY CAUSES OF ACTION OF ANY KIND WITH RESPECT TO THIS AGREEMENT, WHETHER BASED ON BREACH OF CONTRACT, TORT (INCLUDING NEGLIGENCE), OR OTHERWISE, AND WHETHER OR NOT THE OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. All of my obligations under Section 3 regarding the transfer, successors in interest, or assignment of Granted Claims will be satisfied if I notify the transferee or assignee of any patent that I know contains Granted Claims of the obligations under Section 3. Nothing in this Agreement requires me to undertake a patent search.
+10. Definitions. 
+10.1. Agreement. “Agreement” means this W3C Community Final Specification Agreement.
+10.2. Corresponding Working Group. “Corresponding Working Group” is a W3C Working Group that is chartered to develop a Recommendation, as defined in the W3C Process Document, that takes the Specification as an input.
+10.3. Essential Claims. “Essential Claims” shall mean all claims in any patent or patent application in any jurisdiction in the world that would necessarily be infringed by implementation of the Specification. A claim is necessarily infringed hereunder only when it is not possible to avoid infringing it because there is no non-infringing alternative for implementing the normative portions of the Specification. Existence of a non-infringing alternative shall be judged based on the state of the art at the time of the publication of the Specification. The following are expressly excluded from and shall not be deemed to constitute Essential Claims: 
+10.3.1. any claims other than as set forth above even if contained in the same patent as Essential Claims; and
+10.3.2. claims which would be infringed only by: 
+portions of an implementation that are not specified in the normative portions of the Specification, or
+enabling technologies that may be necessary to make or use any product or portion thereof that complies with the Specification and are not themselves expressly set forth in the Specification (e.g., semiconductor manufacturing technology, compiler technology, object-oriented technology, basic operating system technology, and the like); or
+the implementation of technology developed elsewhere and merely incorporated by reference in the body of the Specification.
+10.3.3. design patents and design registrations.
+For purposes of this definition, the normative portions of the Specification shall be deemed to include only architectural and interoperability requirements. Optional features in the RFC 2119 sense are considered normative unless they are specifically identified as informative. Implementation examples or any other material that merely illustrate the requirements of the Specification are informative, rather than normative.
+10.4. I, Me, or My. “I,” “me,” or “my” refers to the signatory.
+10.5 Project. “Project” means the W3C Community Group or Business Group for which I executed this Agreement.
+10.6. Specification. “Specification” means the Specification identified by the Project as the target of this agreement in a call for Final Specification Commitments. W3C shall provide the authoritative mechanisms for the identification of this Specification.
+10.7. W3C Community RF Licensing Requirements. “W3C Community RF Licensing Requirements” license shall mean a non-assignable, non-sublicensable license to make, have made, use, sell, have sold, offer to sell, import, and distribute and dispose of implementations of the Specification that: 
+10.7.1. shall be available to all, worldwide, whether or not they are W3C Members;
+10.7.2. shall extend to all Essential Claims owned or controlled by me;
+10.7.3. may be limited to implementations of the Specification, and to what is required by the Specification;
+10.7.4. may be conditioned on a grant of a reciprocal RF license (as defined in this policy) to all Essential Claims owned or controlled by the licensee. A reciprocal license may be required to be available to all, and a reciprocal license may itself be conditioned on a further reciprocal license from all.
+10.7.5. may not be conditioned on payment of royalties, fees or other consideration;
+10.7.6. may be suspended with respect to any licensee when licensor issued by licensee for infringement of claims essential to implement the Specification or any W3C Recommendation;
+10.7.7. may not impose any further conditions or restrictions on the use of any technology, intellectual property rights, or other restrictions on behavior of the licensee, but may include reasonable, customary terms relating to operation or maintenance of the license relationship such as the following: choice of law and dispute resolution;
+10.7.8. shall not be considered accepted by an implementer who manifests an intent not to accept the terms of the W3C Community RF Licensing Requirements license as offered by the licensor.
+10.7.9. The RF license conforming to the requirements in this policy shall be made available by the licensor as long as the Specification is in effect. The term of such license shall be for the life of the patents in question.
+I am encouraged to provide a contact from which licensing information can be obtained and other relevant licensing information. Any such information will be made publicly available. 
+10.8. You or Your. “You,” “you,” or “your” means any person or entity who exercises copyright or patent rights granted under this Agreement, and any person that person or entity controls.
+
+------------- End of ThirdPartyNotices ------------------------------------------- */
 
-------------- End of ThirdPartyNotices --------------------------------------------------- */

lib/cs/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "Přidat inicializační výraz k vlastnosti {0}",
   "Add_initializers_to_all_uninitialized_properties_95027": "Přidat inicializátory do všech neinicializovaných vlastností",
   "Add_missing_super_call_90001": "Přidat chybějící volání metody super()",
+  "Add_missing_typeof_95052": "Přidat chybějící typeof",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Přidat kvalifikátor do všech nerozpoznaných proměnných odpovídajících názvu členu",
   "Add_to_all_uncalled_decorators_95044": "Přidat () do všech nevolaných dekorátorů",
   "Add_ts_ignore_to_all_error_messages_95042": "Přidat @ts-ignore do všech chybových zpráv",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Všechny deklarace abstraktní metody musí jít po sobě.",
   "All_destructured_elements_are_unused_6198": "Žádný z destrukturovaných elementů se nepoužívá.",
   "All_imports_in_import_declaration_are_unused_6192": "Žádné importy z deklarace importu se nepoužívají.",
+  "All_variables_are_unused_6199": "Žádná z proměnných se nepoužívá.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Povolte výchozí importy z modulů bez výchozího exportu. Nebude to mít vliv na generování kódu, jenom na kontrolu typů.",
   "Allow_javascript_files_to_be_compiled_6102": "Povolí kompilaci souborů javascript.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "Když se zadá příznak --isolatedModules, nepovolují se ambientní výčty.",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Třída {0} se používá dříve, než se deklaruje.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Deklarace tříd nemůžou mít více než jednu značku @augments nebo @extends.",
   "Class_name_cannot_be_0_2414": "Třída nemůže mít název {0}.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Když se cílí na ES5 s modulem {0}, název třídy nemůže být Object.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "Statická strana třídy {0} nesprávně rozšiřuje statickou stranu základní třídy {1}.",
   "Classes_can_only_extend_a_single_class_1174": "Třídy můžou rozšířit jenom jednu třídu.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Třídy obsahující abstraktní metody musí být označené jako abstraktní.",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "Konstruktor třídy {0} je chráněný a dostupný jenom v rámci deklarace třídy.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Konstruktory odvozených tříd musí obsahovat volání příkazu super.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Není zadaný obsažený soubor a nedá se určit kořenový adresář – přeskakuje se vyhledávání ve složce node_modules.",
+  "Convert_0_to_mapped_object_type_95055": "Převést {0} na typ mapovaného objektu",
   "Convert_all_constructor_functions_to_classes_95045": "Převést všechny funkce konstruktoru na třídy",
   "Convert_all_require_to_import_95048": "Převést všechna volání require na import",
   "Convert_all_to_default_imports_95035": "Převést vše na výchozí importy",
   "Convert_function_0_to_class_95002": "Převést funkci {0} na třídu",
   "Convert_function_to_an_ES2015_class_95001": "Převést funkci na třídu ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Převést pojmenované importy na import oboru názvů",
+  "Convert_namespace_import_to_named_imports_95056": "Převést import oboru názvů na pojmenované importy",
   "Convert_require_to_import_95047": "Převést require na import",
   "Convert_to_ES6_module_95017": "Převést na modul ES6",
   "Convert_to_default_import_95013": "Převést na výchozí import",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "Ne všechny cesty kódu vracejí hodnotu.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "Typ číselného indexu {0} se nedá přiřadit k typu indexu řetězce {1}.",
   "Numeric_separators_are_not_allowed_here_6188": "Číselné oddělovače tady nejsou povolené.",
+  "Object_is_of_type_unknown_2571": "Objekt je typu Neznámý.",
   "Object_is_possibly_null_2531": "Objekt je pravděpodobně null.",
   "Object_is_possibly_null_or_undefined_2533": "Objekt je pravděpodobně null nebo undefined.",
   "Object_is_possibly_undefined_2532": "Objekt je pravděpodobně undefined.",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Přesměrování výstupní struktury do adresáře",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Odkazovaný projekt {0} musí mít nastavení \"composite\": true.",
   "Remove_all_unreachable_code_95051": "Odebrat veškerý nedosažitelný kód",
+  "Remove_all_unused_labels_95054": "Odebrat všechny nepoužívané popisky",
   "Remove_declaration_for_Colon_0_90004": "Odebrat deklaraci pro {0}",
   "Remove_destructuring_90009": "Odebrat destrukci",
   "Remove_import_from_0_90005": "Odebrat import z {0}",
   "Remove_unreachable_code_95050": "Odebrat nedosažitelný kód",
+  "Remove_unused_label_95053": "Odebrat nepoužitý popisek",
+  "Remove_variable_statement_90010": "Odebrat příkaz proměnné",
   "Replace_import_with_0_95015": "Nahradí import použitím: {0}.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Oznámí se chyba, když některé cesty kódu ve funkci nevracejí hodnotu.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Oznámí se chyby v případech fallthrough v příkazu switch.",

lib/de/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "Initialisierer zu Eigenschaft \"{0}\" hinzufügen",
   "Add_initializers_to_all_uninitialized_properties_95027": "Allen nicht initialisierten Eigenschaften Initialisierer hinzufügen",
   "Add_missing_super_call_90001": "Fehlenden super()-Aufruf hinzufügen",
+  "Add_missing_typeof_95052": "Fehlenden \"typeof\" hinzufügen",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Allen nicht aufgelösten Variablen, die einem Membernamen entsprechen, Qualifizierer hinzufügen",
   "Add_to_all_uncalled_decorators_95044": "Allen nicht aufgerufenen Decorators \"()\" hinzufügen",
   "Add_ts_ignore_to_all_error_messages_95042": "Allen Fehlermeldungen \"@ts-ignore\" hinzufügen",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Alle Deklarationen einer abstrakten Methode müssen aufeinanderfolgend sein.",
   "All_destructured_elements_are_unused_6198": "Alle destrukturierten Elemente werden nicht verwendet.",
   "All_imports_in_import_declaration_are_unused_6192": "Keiner der Importe in der Importdeklaration wird verwendet.",
+  "All_variables_are_unused_6199": "Alle Variablen werden nicht verwendet.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Standardimporte von Modulen ohne Standardexport zulassen. Dies wirkt sich nicht auf die Codeausgabe aus, lediglich auf die Typprüfung.",
   "Allow_javascript_files_to_be_compiled_6102": "Kompilierung von JavaScript-Dateien zulassen.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "const-Umgebungsenumerationen sind unzulässig, wenn das Flag \"-isolatedModules\" angegeben wird.",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Klasse \"{0}\", die vor der Deklaration verwendet wurde.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Klassendeklarationen dürfen maximal ein \"@augments\"- oder \"@extends\"-Tag aufweisen.",
   "Class_name_cannot_be_0_2414": "Der Klassenname darf nicht \"{0}\" sein.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Der Klassenname darf nicht \"Object\" lauten, wenn ES5 mit Modul \"{0}\" als Ziel verwendet wird.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "Die statische Seite der Klasse \"{0}\" erweitert fälschlicherweise die statische Seite der Basisklasse \"{1}\".",
   "Classes_can_only_extend_a_single_class_1174": "Klassen dürfen nur eine einzelne Klasse erweitern.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Klassen, die abstrakte Methoden enthalten, müssen als abstrakt markiert werden.",
@@ -273,6 +276,7 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "Der Konstruktor der Klasse \"{0}\" ist geschützt. Auf ihn kann nur innerhalb der Klassendeklaration zugegriffen werden.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Konstruktoren für abgeleitete Klassen müssen einen Aufruf \"super\" enthalten.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Die enthaltene Datei wird nicht angegeben, und das Stammverzeichnis kann nicht ermittelt werden. Die Suche im Ordner \"node_modules\" wird übersprungen.",
+  "Convert_0_to_mapped_object_type_95055": "\"{0}\" in zugeordneten Objekttyp konvertieren",
   "Convert_all_constructor_functions_to_classes_95045": "Alle Konstruktorfunktionen in Klassen konvertieren",
   "Convert_all_require_to_import_95048": "Alle Aufrufe von \"require\" in \"import\" konvertieren",
   "Convert_all_to_default_imports_95035": "Alle in Standardimporte konvertieren",
@@ -708,10 +712,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Die Ausgabestruktur in das Verzeichnis umleiten.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Das referenzierte Projekt \"{0}\" muss für die Einstellung \"composite\" den Wert TRUE aufweisen.",
   "Remove_all_unreachable_code_95051": "Gesamten nicht erreichbaren Code entfernen",
+  "Remove_all_unused_labels_95054": "Alle nicht verwendeten Bezeichnungen entfernen",
   "Remove_declaration_for_Colon_0_90004": "Deklaration entfernen für: {0}",
   "Remove_destructuring_90009": "Destrukturierung entfernen",
   "Remove_import_from_0_90005": "Import aus \"{0}\" entfernen",
   "Remove_unreachable_code_95050": "Nicht erreichbaren Code entfernen",
+  "Remove_unused_label_95053": "Nicht verwendete Bezeichnung entfernen",
+  "Remove_variable_statement_90010": "Variablenanweisung entfernen",
   "Replace_import_with_0_95015": "Ersetzen Sie den Import durch \"{0}\".",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Fehler melden, wenn nicht alle Codepfade in der Funktion einen Wert zurückgeben.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Für FallTrough-Fälle in switch-Anweisung Fehler melden.",

lib/enu/diagnosticMessages.generated.json.lcg

@@ -735,6 +735,12 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";All_variables_are_unused_6199" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[All variables are unused.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Allow default imports from modules with no default export. This does not affect code emit, just typechecking.]]></Val>
@@ -1551,6 +1557,12 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Class name cannot be 'Object' when targeting ES5 with module {0}.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Class static side '{0}' incorrectly extends base class static side '{1}'.]]></Val>
@@ -1659,6 +1671,12 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";Convert_0_to_mapped_object_type_95055" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Convert '{0}' to mapped object type]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Convert_all_constructor_functions_to_classes_95045" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Convert all constructor functions to classes]]></Val>
@@ -1689,6 +1707,18 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Convert named imports to namespace import]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
+            <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Convert namespace import to named imports]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -3501,6 +3531,12 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Object is possibly 'null'.]]></Val>
@@ -4305,6 +4341,12 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";Remove_variable_statement_90010" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Remove variable statement]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Replace_import_with_0_95015" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Replace import with '{0}'.]]></Val>
@@ -5619,6 +5661,12 @@
               </Str>
               <Disp Icon="Str" />
             </Item>
+            <Item ItemId=";Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces_1069" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Unexpected token. A type parameter name was expected without curly braces.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
             <Item ItemId=";Unexpected_token_expected_1179" ItemType="0" PsrId="306" Leaf="true">
               <Str Cat="Text">
                 <Val><![CDATA[Unexpected token. '{' expected.]]></Val>

lib/es/diagnosticMessages.generated.json

@@ -106,7 +106,7 @@
   "Add_initializer_to_property_0_95019": "Agregar inicializador a la propiedad \"{0}\"",
   "Add_initializers_to_all_uninitialized_properties_95027": "Agregar inicializadores a todas las propiedades sin inicializar",
   "Add_missing_super_call_90001": "Agregar la llamada a \"super()\" que falta",
-  "Add_missing_typeof_95052": "Agregar el objeto typeof que falta",
+  "Add_missing_typeof_95052": "Agregar el elemento \"typeof\" que falta",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Agregar un calificador a todas las variables no resueltas que coincidan con un nombre de miembro",
   "Add_to_all_uncalled_decorators_95044": "Agregar \"()\" a todos los elementos Decorator a los que no se llama",
   "Add_ts_ignore_to_all_error_messages_95042": "Agregar \"@ts-ignore\" a todos los mensajes de error",
@@ -120,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Todas las declaraciones de un método abstracto deben ser consecutivas.",
   "All_destructured_elements_are_unused_6198": "Todos los elementos desestructurados están sin utilizar.",
   "All_imports_in_import_declaration_are_unused_6192": "Todas las importaciones de la declaración de importación están sin utilizar.",
+  "All_variables_are_unused_6199": "Todas las variables son no utilizadas.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Permitir las importaciones predeterminadas de los módulos sin exportación predeterminada. Esto no afecta a la emisión de código, solo a la comprobación de tipos.",
   "Allow_javascript_files_to_be_compiled_6102": "Permitir que se compilen los archivos de JavaScript.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "No se permiten enumeraciones const de ambiente cuando se proporciona la marca \"--isolatedModules\".",
@@ -256,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Se ha usado la clase \"{0}\" antes de declararla.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Las declaraciones de clase no pueden tener más de una etiqueta \"@augments\" o \"@extends\".",
   "Class_name_cannot_be_0_2414": "El nombre de la clase no puede ser \"{0}\".",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "El nombre de clase no puede ser \"Object\" cuando el destino es ES5 con un módulo {0}.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "El lado estático de la clase '{0}' extiende el lado estático de la clase base '{1}' de forma incorrecta.",
   "Classes_can_only_extend_a_single_class_1174": "Las clases solo pueden extender una clase única.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Las clases con métodos abstractos deben marcarse como abstractas.",
@@ -274,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "El constructor de la clase '{0}' está protegido y solo es accesible desde la declaración de la clase.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Los constructores de las clases derivadas deben contener una llamada a \"super\".",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "El archivo contenedor no se ha especificado y no se puede determinar el directorio raíz. Se omitirá la búsqueda en la carpeta 'node_modules'.",
+  "Convert_0_to_mapped_object_type_95055": "Convertir \"{0}\" en el tipo de objeto asignado",
   "Convert_all_constructor_functions_to_classes_95045": "Convertir todas las funciones de constructor en clases",
   "Convert_all_require_to_import_95048": "Convertir todas las repeticiones de \"require\" en \"import\"",
   "Convert_all_to_default_imports_95035": "Convertir todo en importaciones predeterminadas",
   "Convert_function_0_to_class_95002": "Convertir la función \"{0}\" en una clase",
   "Convert_function_to_an_ES2015_class_95001": "Convertir la función en una clase ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Convertir importaciones con nombre en una importación de espacio de nombres",
+  "Convert_namespace_import_to_named_imports_95056": "Convertir una importación de espacio de nombres en importaciones con nombre",
   "Convert_require_to_import_95047": "Convertir \"require\" en \"import\"",
   "Convert_to_ES6_module_95017": "Convertir en módulo ES6",
   "Convert_to_default_import_95013": "Convertir en importación predeterminada",
@@ -581,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "No todas las rutas de acceso de código devuelven un valor.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "El tipo de índice numérico '{0}' no se puede asignar a un tipo de índice de cadena '{1}'.",
   "Numeric_separators_are_not_allowed_here_6188": "Aquí no se permiten separadores numéricos.",
+  "Object_is_of_type_unknown_2571": "El objeto es de tipo \"desconocido\".",
   "Object_is_possibly_null_2531": "El objeto es posiblemente \"null\".",
   "Object_is_possibly_null_or_undefined_2533": "El objeto es posiblemente \"null\" o \"undefined\".",
   "Object_is_possibly_undefined_2532": "El objeto es posiblemente \"undefined\".",
@@ -709,12 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Redirija la estructura de salida al directorio.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "El proyecto \"{0}\" al que se hace referencia debe tener el valor \"composite\": true.",
   "Remove_all_unreachable_code_95051": "Quitar todo el código inaccesible",
-  "Remove_all_unused_labels_95054": "Remove all unused labels",
+  "Remove_all_unused_labels_95054": "Quitar todas las etiquetas no utilizadas",
   "Remove_declaration_for_Colon_0_90004": "Quitar declaración de: \"{0}\"",
   "Remove_destructuring_90009": "Quitar la desestructuración",
   "Remove_import_from_0_90005": "Quitar importación de \"{0}\"",
   "Remove_unreachable_code_95050": "Quitar el código inaccesible",
-  "Remove_unused_label_95053": "Remove unused label",
+  "Remove_unused_label_95053": "Quitar etiqueta no utilizada",
+  "Remove_variable_statement_90010": "Quitar la declaración de variable",
   "Replace_import_with_0_95015": "Reemplazar importación por \"{0}\".",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Notificar un error cuando no todas las rutas de acceso de código en funcionamiento devuelven un valor.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Notificar errores de los casos de fallthrough en la instrucción switch.",

lib/fr/diagnosticMessages.generated.json

@@ -106,7 +106,7 @@
   "Add_initializer_to_property_0_95019": "Ajouter un initialiseur à la propriété '{0}'",
   "Add_initializers_to_all_uninitialized_properties_95027": "Ajouter des initialiseurs à toutes les propriétés non initialisées",
   "Add_missing_super_call_90001": "Ajouter l'appel manquant à 'super()'",
-  "Add_missing_typeof_95052": "Ajouter un typeof manquant",
+  "Add_missing_typeof_95052": "Ajouter un 'typeof' manquant",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Ajouter un qualificateur à toutes les variables non résolues correspondant à un nom de membre",
   "Add_to_all_uncalled_decorators_95044": "Ajouter '()' à tous les décorateurs non appelés",
   "Add_ts_ignore_to_all_error_messages_95042": "Ajouter '@ts-ignore' à tous les messages d'erreur",
@@ -120,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Toutes les déclarations d'une méthode abstraite doivent être consécutives.",
   "All_destructured_elements_are_unused_6198": "Tous les éléments déstructurés sont inutilisés.",
   "All_imports_in_import_declaration_are_unused_6192": "Les importations de la déclaration d'importation ne sont pas toutes utilisées.",
+  "All_variables_are_unused_6199": "Toutes les variables sont inutilisées.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Autorisez les importations par défaut à partir des modules sans exportation par défaut. Cela n'affecte pas l'émission du code, juste le contrôle de type.",
   "Allow_javascript_files_to_be_compiled_6102": "Autorisez la compilation des fichiers JavaScript.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "Les enums const ambiants ne sont pas autorisés quand l'indicateur '--isolatedModules' est fourni.",
@@ -256,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Classe '{0}' utilisée avant sa déclaration.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Les déclarations de classes ne peuvent pas avoir plusieurs balises '@augments' ou '@extends'.",
   "Class_name_cannot_be_0_2414": "Le nom de la classe ne peut pas être '{0}'.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Le nom de la classe ne peut pas être 'Object' quand ES5 est ciblé avec le module {0}.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "Le côté statique de la classe '{0}' étend de manière incorrecte le côté statique de la classe de base '{1}'.",
   "Classes_can_only_extend_a_single_class_1174": "Les classes ne peuvent étendre qu'une seule classe.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Les classes contenant des méthodes abstraites doivent être marquées comme étant abstraites.",
@@ -274,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "Le constructeur de la classe '{0}' est protégé et uniquement accessible dans la déclaration de classe.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Les constructeurs pour les classes dérivées doivent contenir un appel de 'super'.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Fichier conteneur non spécifié et répertoire racine impossible à déterminer. Recherche ignorée dans le dossier 'node_modules'.",
+  "Convert_0_to_mapped_object_type_95055": "Convertir '{0}' en type d'objet mappé",
   "Convert_all_constructor_functions_to_classes_95045": "Convertir toutes les fonctions de constructeur en classes",
   "Convert_all_require_to_import_95048": "Convertir tous les 'require' en 'import'",
   "Convert_all_to_default_imports_95035": "Convertir tout en importations par défaut",
   "Convert_function_0_to_class_95002": "Convertir la fonction '{0}' en classe",
   "Convert_function_to_an_ES2015_class_95001": "Convertir la fonction en classe ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Convertir les importations nommées en importation d'espace de noms",
+  "Convert_namespace_import_to_named_imports_95056": "Convertir l'importation d'espace de noms en importations nommées",
   "Convert_require_to_import_95047": "Convertir 'require' en 'import'",
   "Convert_to_ES6_module_95017": "Convertir en module ES6",
   "Convert_to_default_import_95013": "Convertir en importation par défaut",
@@ -581,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "Les chemins de code ne retournent pas tous une valeur.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "Impossible d'assigner le type d'index numérique '{0}' au type d'index de chaîne '{1}'.",
   "Numeric_separators_are_not_allowed_here_6188": "Les séparateurs numériques ne sont pas autorisés ici.",
+  "Object_is_of_type_unknown_2571": "L'objet est de type 'unknown'.",
   "Object_is_possibly_null_2531": "L'objet a peut-être la valeur 'null'.",
   "Object_is_possibly_null_or_undefined_2533": "L'objet a peut-être la valeur 'null' ou 'undefined'.",
   "Object_is_possibly_undefined_2532": "L'objet a peut-être la valeur 'undefined'.",
@@ -709,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Rediriger la structure de sortie vers le répertoire.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Le projet référencé '{0}' doit avoir le paramètre \"composite\" avec la valeur true.",
   "Remove_all_unreachable_code_95051": "Supprimer tout le code inaccessible",
+  "Remove_all_unused_labels_95054": "Supprimer toutes les étiquettes inutilisées",
   "Remove_declaration_for_Colon_0_90004": "Supprimer la déclaration pour : '{0}'",
   "Remove_destructuring_90009": "Supprimer la déstructuration",
   "Remove_import_from_0_90005": "Supprimer l'importation de '{0}'",
   "Remove_unreachable_code_95050": "Supprimer le code inaccessible",
+  "Remove_unused_label_95053": "Supprimer l'étiquette inutilisée",
+  "Remove_variable_statement_90010": "Supprimer l'instruction de variable",
   "Replace_import_with_0_95015": "Remplacez l'importation par '{0}'.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Signalez une erreur quand les chemins de code de la fonction ne retournent pas tous une valeur.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Signalez les erreurs pour les case avec fallthrough dans une instruction switch.",

lib/it/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "Aggiungere l'inizializzatore alla proprietà '{0}'",
   "Add_initializers_to_all_uninitialized_properties_95027": "Aggiungere gli inizializzatori a tutte le proprietà non inizializzate",
   "Add_missing_super_call_90001": "Aggiungere la chiamata mancante a 'super()'",
+  "Add_missing_typeof_95052": "Aggiungere l'elemento 'typeof' mancante",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Aggiungere il qualificatore a tutte le variabili non risolte corrispondenti a un nome di membro",
   "Add_to_all_uncalled_decorators_95044": "Aggiungere '()' a tutti gli elementi Decorator non chiamati",
   "Add_ts_ignore_to_all_error_messages_95042": "Aggiungere '@ts-ignore' a tutti i messaggi di errore",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Tutte le dichiarazioni di un metodo astratto devono essere consecutive.",
   "All_destructured_elements_are_unused_6198": "Tutti gli elementi destrutturati sono inutilizzati.",
   "All_imports_in_import_declaration_are_unused_6192": "Tutte le importazioni nella dichiarazione di importazione sono inutilizzate.",
+  "All_variables_are_unused_6199": "Tutte le variabili sono inutilizzate.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Consente di eseguire importazioni predefinite da moduli senza esportazione predefinita. Non influisce sulla creazione del codice ma solo sul controllo dei tipi.",
   "Allow_javascript_files_to_be_compiled_6102": "Consente la compilazione di file JavaScript.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "Le enumerazioni const di ambiente non sono consentite quando viene specificato il flag '--isolatedModules'.",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "La classe '{0}' è stata usata prima di essere stata dichiarata.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Le dichiarazioni di classe non possono contenere più di un tag `@augments` o `@extends`.",
   "Class_name_cannot_be_0_2414": "Il nome della classe non può essere '{0}'.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Il nome della classe non può essere 'Object' quando la destinazione è ES5 con il modulo {0}.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "Il lato statico '{0}' della classe estende in modo errato il lato statico '{1}' della classe di base.",
   "Classes_can_only_extend_a_single_class_1174": "Le classi possono estendere solo un'unica classe.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Le classi che contengono metodi astratti devono essere contrassegnate come astratte.",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "Il costruttore della classe '{0}' è protetto e accessibile solo all'interno della dichiarazione di classe.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "I costruttori di classi derivate devono contenere una chiamata 'super'.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Il file contenitore non è specificato e non è possibile determinare la directory radice. La ricerca nella cartella 'node_modules' verrà ignorata.",
+  "Convert_0_to_mapped_object_type_95055": "Convertire '{0}' nel tipo di oggetto con mapping",
   "Convert_all_constructor_functions_to_classes_95045": "Convertire tutte le funzioni di costruttore in classi",
   "Convert_all_require_to_import_95048": "Convertire tutte le occorrenze di 'require' in 'import'",
   "Convert_all_to_default_imports_95035": "Convertire tutte le impostazioni predefinite",
   "Convert_function_0_to_class_95002": "Converti la funzione '{0}' in classe",
   "Convert_function_to_an_ES2015_class_95001": "Converti la funzione in una classe ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Convertire le importazioni denominate in importazione spazi dei nomi",
+  "Convert_namespace_import_to_named_imports_95056": "Convertire l'importazione spazi dei nomi in importazioni denominate",
   "Convert_require_to_import_95047": "Convertire 'require' in 'import'",
   "Convert_to_ES6_module_95017": "Converti in modulo ES6",
   "Convert_to_default_import_95013": "Converti nell'importazione predefinita",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "Non tutti i percorsi del codice restituiscono un valore.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "Il tipo di indice numerico '{0}' non è assegnabile al tipo di indice stringa '{1}'.",
   "Numeric_separators_are_not_allowed_here_6188": "I separatori numerici non sono consentiti in questa posizione.",
+  "Object_is_of_type_unknown_2571": "L'oggetto è di tipo 'unknown'.",
   "Object_is_possibly_null_2531": "L'oggetto è probabilmente 'null'.",
   "Object_is_possibly_null_or_undefined_2533": "L'oggetto è probabilmente 'null' o 'undefined'.",
   "Object_is_possibly_undefined_2532": "L'oggetto è probabilmente 'undefined'.",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Reindirizza la struttura di output alla directory.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Il progetto di riferimento '{0}' deve includere l'impostazione \"composite\": true.",
   "Remove_all_unreachable_code_95051": "Rimuovere tutto il codice non eseguibile",
+  "Remove_all_unused_labels_95054": "Rimuovere tutte le etichette inutilizzate",
   "Remove_declaration_for_Colon_0_90004": "Rimuovere la dichiarazione per '{0}'",
   "Remove_destructuring_90009": "Rimuovere la destrutturazione",
   "Remove_import_from_0_90005": "Rimuovere l'importazione da '{0}'",
   "Remove_unreachable_code_95050": "Rimuovere il codice non eseguibile",
+  "Remove_unused_label_95053": "Rimuovere l'etichetta inutilizzata",
+  "Remove_variable_statement_90010": "Rimuovere l'istruzione di variabile",
   "Replace_import_with_0_95015": "Sostituire l'importazione con '{0}'.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Segnala l'errore quando non tutti i percorsi del codice nella funzione restituiscono un valore.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Segnala errori per i casi di fallthrough nell'istruzione switch.",

lib/ja/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "プロパティ '{0}' に初期化子を追加します",
   "Add_initializers_to_all_uninitialized_properties_95027": "初期化されていないすべてのプロパティに初期化子を追加します",
   "Add_missing_super_call_90001": "欠落している 'super()' 呼び出しを追加する",
+  "Add_missing_typeof_95052": "不足している 'typeof' を追加します",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "メンバー名と一致するすべての未解決の変数に修飾子を追加します",
   "Add_to_all_uncalled_decorators_95044": "呼び出されていないすべてのデコレーターに '()' を追加します",
   "Add_ts_ignore_to_all_error_messages_95042": "すべてのエラー メッセージに '@ts-ignore' を追加します",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "抽象メソッドの宣言はすべて連続している必要があります。",
   "All_destructured_elements_are_unused_6198": "非構造化要素はいずれも使用されていません。",
   "All_imports_in_import_declaration_are_unused_6192": "インポート宣言内のインポートはすべて未使用です。",
+  "All_variables_are_unused_6199": "すべての変数は未使用です。",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "既定のエクスポートがないモジュールからの既定のインポートを許可します。これは、型チェックのみのため、コード生成には影響を与えません。",
   "Allow_javascript_files_to_be_compiled_6102": "javascript ファイルのコンパイルを許可します。",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "'--isolatedModules' フラグが指定されている場合、アンビエント const 列挙型は使用できません。",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "クラス '{0}' は宣言の前に使用されました。",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "クラス宣言で複数の '@augments' または `@extends` タグを使用することはできません。",
   "Class_name_cannot_be_0_2414": "クラス名を '{0}' にすることはできません。",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "モジュール {0} を使用して ES5 をターゲットとするときに、クラス名を 'オブジェクト' にすることはできません。",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "クラス側の静的な '{0}' が基底クラス側の静的な '{1}' を正しく拡張していません。",
   "Classes_can_only_extend_a_single_class_1174": "クラスで拡張できるクラスは 1 つのみです。",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "抽象メソッドを含むクラスは abstract に指定する必要があります。",
@@ -273,6 +276,7 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "クラス '{0}' のコンストラクターは保護されており、クラス宣言内でのみアクセス可能です。",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "派生クラスのコンストラクターには 'super' の呼び出しを含める必要があります。",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "包含するファイルが指定されていないため、ルート ディレクトリを決定できません。'node_modules' フォルダーのルックアップをスキップします。",
+  "Convert_0_to_mapped_object_type_95055": "'{0}' をマップされたオブジェクト型に変換する",
   "Convert_all_constructor_functions_to_classes_95045": "すべてのコンストラクター関数をクラスに変換します",
   "Convert_all_require_to_import_95048": "'require' をすべて 'import' に変換",
   "Convert_all_to_default_imports_95035": "すべてを既定のインポートに変換します",
@@ -708,10 +712,13 @@
   "Redirect_output_structure_to_the_directory_6006": "ディレクトリへ出力構造をリダイレクトします。",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "参照されているプロジェクト '{0}' には、設定 \"composite\": true が必要です。",
   "Remove_all_unreachable_code_95051": "到達できないコードをすべて削除します",
+  "Remove_all_unused_labels_95054": "すべての未使用のラベルを削除します",
   "Remove_declaration_for_Colon_0_90004": "次に対する宣言を削除する: '{0}'",
   "Remove_destructuring_90009": "非構造化を削除します",
   "Remove_import_from_0_90005": "'{0}' からのインポートを削除",
   "Remove_unreachable_code_95050": "到達できないコードを削除します",
+  "Remove_unused_label_95053": "未使用のラベルを削除します",
+  "Remove_variable_statement_90010": "変数のステートメントを削除します",
   "Replace_import_with_0_95015": "インポートを '{0}' に置換します。",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "関数の一部のコード パスが値を返さない場合にエラーを報告します。",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "switch ステートメントに case のフォールスルーがある場合にエラーを報告します。",

lib/ko/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "'{0}' 속성에 이니셜라이저 추가",
   "Add_initializers_to_all_uninitialized_properties_95027": "초기화되지 않은 모든 속성에 이니셜라이저 추가",
   "Add_missing_super_call_90001": "누락된 'super()' 호출 추가",
+  "Add_missing_typeof_95052": "누락된 'typeof' 추가",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "멤버 이름과 일치하는 모든 확인되지 않은 변수에 한정자 추가",
   "Add_to_all_uncalled_decorators_95044": "호출되지 않는 모든 데코레이터에 '()' 추가",
   "Add_ts_ignore_to_all_error_messages_95042": "모든 오류 메시지에 '@ts-ignore' 추가",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "추상 메서드의 모든 선언은 연속적이어야 합니다.",
   "All_destructured_elements_are_unused_6198": "구조 파괴된 요소가 모두 사용되지 않습니다.",
   "All_imports_in_import_declaration_are_unused_6192": "가져오기 선언의 모든 가져오기가 사용되지 않습니다.",
+  "All_variables_are_unused_6199": "모든 변수가 사용되지 않습니다.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "기본 내보내기가 없는 모듈에서 기본 가져오기를 허용합니다. 여기서는 코드 내보내기에는 영향을 주지 않고 형식 검사만 합니다.",
   "Allow_javascript_files_to_be_compiled_6102": "Javascript 파일을 컴파일하도록 허용합니다.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "'--isolatedModules' 플래그가 제공된 경우 앰비언트 const 열거형이 허용되지 않습니다.",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "선언 전에 사용된 '{0}' 클래스입니다.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "클래스 선언은 '@augments' 또는 `@extends` 태그를 둘 이상 가질 수 없습니다.",
   "Class_name_cannot_be_0_2414": "클래스 이름은 '{0}'일 수 없습니다.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "{0} 모듈을 사용하는 ES5를 대상으로 하는 경우 클래스 이름은 'Object'일 수 없습니다.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "클래스 정적 측면 '{0}'이(가) 기본 클래스 정적 측면 '{1}'을(를) 잘못 확장합니다.",
   "Classes_can_only_extend_a_single_class_1174": "클래스는 단일 클래스만 확장할 수 있습니다.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "추상 메서드를 포함하는 클래스는 abstract로 표시되어 있어야 합니다.",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "'{0}' 클래스의 생성자는 protected이며 클래스 선언 내에서만 액세스할 수 있습니다.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "파생 클래스의 생성자는 'super' 호출을 포함해야 합니다.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "포함 파일이 지정되지 않았고 루트 디렉터리를 확인할 수 없어 'node_modules' 폴더 조회를 건너뜁니다.",
+  "Convert_0_to_mapped_object_type_95055": "'{0}'을(를) 매핑된 개체 형식으로 변환",
   "Convert_all_constructor_functions_to_classes_95045": "모든 생성자 함수를 클래스로 변환",
   "Convert_all_require_to_import_95048": "모든 'require'를 'import'로 변환",
   "Convert_all_to_default_imports_95035": "모든 항목을 기본 가져오기로 변환",
   "Convert_function_0_to_class_95002": "'{0}' 함수를 클래스로 변환",
   "Convert_function_to_an_ES2015_class_95001": "함수를 ES2015 클래스로 변환",
+  "Convert_named_imports_to_namespace_import_95057": "명명된 가져오기를 네임스페이스 가져오기로 변환",
+  "Convert_namespace_import_to_named_imports_95056": "네임스페이스 가져오기를 명명된 가져오기로 변환",
   "Convert_require_to_import_95047": "'require'를 'import'로 변환",
   "Convert_to_ES6_module_95017": "ES6 모듈로 변환",
   "Convert_to_default_import_95013": "기본 가져오기로 변환",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "일부 코드 경로가 값을 반환하지 않습니다.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "숫자 인덱스 형식 '{0}'을(를) 문자열 인덱스 형식 '{1}'에 할당할 수 없습니다.",
   "Numeric_separators_are_not_allowed_here_6188": "숫자 구분 기호는 여기에서 허용되지 않습니다.",
+  "Object_is_of_type_unknown_2571": "개체가 '알 수 없는' 형식입니다.",
   "Object_is_possibly_null_2531": "개체가 'null'인 것 같습니다.",
   "Object_is_possibly_null_or_undefined_2533": "개체가 'null' 또는 'undefined'인 것 같습니다.",
   "Object_is_possibly_undefined_2532": "개체가 'undefined'인 것 같습니다.",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "출력 구조를 디렉터리로 리디렉션합니다.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "참조되는 프로젝트 '{0}'에는 \"composite\": true 설정이 있어야 합니다.",
   "Remove_all_unreachable_code_95051": "접근할 수 없는 코드 모두 제거",
+  "Remove_all_unused_labels_95054": "사용되지 않는 레이블 모두 제거",
   "Remove_declaration_for_Colon_0_90004": "'{0}'에 대한 선언 제거",
   "Remove_destructuring_90009": "구조 파괴 제거",
   "Remove_import_from_0_90005": "'{0}'에서 가져오기 제거",
   "Remove_unreachable_code_95050": "접근할 수 없는 코드 제거",
+  "Remove_unused_label_95053": "사용되지 않는 레이블 제거",
+  "Remove_variable_statement_90010": "변수 문 제거",
   "Replace_import_with_0_95015": "가져오기를 '{0}'(으)로 바꿉니다.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "함수의 일부 코드 경로가 값을 반환하지 않는 경우 오류를 보고합니다.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "switch 문의 fallthrough case에 대한 오류를 보고합니다.",

lib/lib.es2015.core.d.ts

@@ -222,29 +222,29 @@ interface NumberConstructor {
      * Returns true if passed value is finite.
      * Unlike the global isFinite, Number.isFinite doesn't forcibly convert the parameter to a
      * number. Only finite values of the type number, result in true.
-     * @param value The value you want to test.
+     * @param number A numeric value.
      */
-    isFinite(value: any): boolean;
+    isFinite(number: number): boolean;
 
     /**
      * Returns true if the value passed is an integer, false otherwise.
-     * @param value The value you want to test.
+     * @param number A numeric value.
      */
-    isInteger(value: any): boolean;
+    isInteger(number: number): boolean;
 
     /**
      * Returns a Boolean value that indicates whether a value is the reserved value NaN (not a
      * number). Unlike the global isNaN(), Number.isNaN() doesn't forcefully convert the parameter
      * to a number. Only values of the type number, that are also NaN, result in true.
-     * @param value The value you want to test.
+     * @param number A numeric value.
      */
-    isNaN(number: any): boolean;
+    isNaN(number: number): boolean;
 
     /**
      * Returns true if the value passed is a safe integer.
-     * @param value The value you want to test
+     * @param number A numeric value.
      */
-    isSafeInteger(value: any): boolean;
+    isSafeInteger(number: number): boolean;
 
     /**
      * The value of the largest integer n such that n and n + 1 are both exactly representable as

lib/lib.esnext.array.d.ts

@@ -23,7 +23,7 @@ interface ReadonlyArray<T> {
     /**
      * Calls a defined callback function on each element of an array. Then, flattens the result into
      * a new array.
-     * This is identical to a map followed by a flatten of depth 1.
+     * This is identical to a map followed by flat with depth 1.
      *
      * @param callback A function that accepts up to three arguments. The flatMap method calls the
      * callback function one time for each element in the array.
@@ -42,7 +42,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[][][][]> |
 
         ReadonlyArray<ReadonlyArray<U[][][]>> |
@@ -71,7 +71,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[][][]> |
 
         ReadonlyArray<ReadonlyArray<U>[][]> |
@@ -91,7 +91,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[][]> |
 
         ReadonlyArray<ReadonlyArray<U[]>> |
@@ -106,7 +106,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[]> |
         ReadonlyArray<ReadonlyArray<U>>,
         depth?: 1
@@ -118,18 +118,18 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U>,
         depth: 0
     ): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
-     * specified depth. If no depth is provided, flatten method defaults to the depth of 1.
+     * specified depth. If no depth is provided, flat method defaults to the depth of 1.
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(depth?: number): any[];
+    flat<U>(depth?: number): any[];
   }
 
 interface Array<T> {
@@ -137,7 +137,7 @@ interface Array<T> {
     /**
      * Calls a defined callback function on each element of an array. Then, flattens the result into
      * a new array.
-     * This is identical to a map followed by a flatten of depth 1.
+     * This is identical to a map followed by flat with depth 1.
      *
      * @param callback A function that accepts up to three arguments. The flatMap method calls the
      * callback function one time for each element in the array.
@@ -155,7 +155,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][][][][], depth: 7): U[];
+    flat<U>(this: U[][][][][][][][], depth: 7): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -163,7 +163,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][][][], depth: 6): U[];
+    flat<U>(this: U[][][][][][][], depth: 6): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -171,7 +171,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][][], depth: 5): U[];
+    flat<U>(this: U[][][][][][], depth: 5): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -179,7 +179,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][], depth: 4): U[];
+    flat<U>(this: U[][][][][], depth: 4): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -187,7 +187,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][], depth: 3): U[];
+    flat<U>(this: U[][][][], depth: 3): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -195,7 +195,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][], depth: 2): U[];
+    flat<U>(this: U[][][], depth: 2): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -203,7 +203,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][], depth?: 1): U[];
+    flat<U>(this: U[][], depth?: 1): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -211,13 +211,13 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[], depth: 0): U[];
+    flat<U>(this: U[], depth: 0): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
-     * specified depth. If no depth is provided, flatten method defaults to the depth of 1.
+     * specified depth. If no depth is provided, flat method defaults to the depth of 1.
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(depth?: number): any[];
+    flat<U>(depth?: number): any[];
 }

lib/lib.esnext.d.ts

@@ -21,3 +21,4 @@ and limitations under the License.
 /// <reference path="lib.es2018.d.ts" />
 /// <reference path="lib.esnext.asynciterable.d.ts" />
 /// <reference path="lib.esnext.array.d.ts" />
+/// <reference path="lib.esnext.symbol.d.ts" />

lib/lib.esnext.full.d.ts

@@ -21,6 +21,7 @@ and limitations under the License.
 /// <reference path="lib.es2018.d.ts" />
 /// <reference path="lib.esnext.asynciterable.d.ts" />
 /// <reference path="lib.esnext.array.d.ts" />
+/// <reference path="lib.esnext.symbol.d.ts" />
 
 
 /////////////////////////////

lib/lib.esnext.symbol.d.ts

@@ -0,0 +1,26 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+
+/// <reference no-default-lib="true"/>
+
+
+interface Symbol {
+    /**
+     * expose the [[Description]] internal slot of a symbol directly
+     */
+    readonly description: string;
+}

lib/pl/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "Dodaj inicjator do właściwości „{0}”",
   "Add_initializers_to_all_uninitialized_properties_95027": "Dodaj inicjatory do wszystkich niezainicjowanych właściwości",
   "Add_missing_super_call_90001": "Dodaj brakujące wywołanie „super()”",
+  "Add_missing_typeof_95052": "Dodaj brakujący element „typeof”",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Dodaj kwalifikator do wszystkich nierozpoznanych zmiennych pasujących do nazwy składowej",
   "Add_to_all_uncalled_decorators_95044": "Dodaj element „()” do wszystkich niewywoływanych dekoratorów",
   "Add_ts_ignore_to_all_error_messages_95042": "Dodaj element „@ts-ignore” do wszystkich komunikatów o błędach",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Wszystkie deklaracje metody abstrakcyjnej muszą występować obok siebie.",
   "All_destructured_elements_are_unused_6198": "Wszystkie elementy, których strukturę usunięto, są nieużywane.",
   "All_imports_in_import_declaration_are_unused_6192": "Wszystkie importy w deklaracji importu są nieużywane.",
+  "All_variables_are_unused_6199": "Wszystkie zmienne są nieużywane.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Zezwalaj na domyślne importy z modułów bez domyślnego eksportu. To nie wpływa na emitowanie kodu, a tylko na sprawdzanie typów.",
   "Allow_javascript_files_to_be_compiled_6102": "Zezwalaj na kompilowanie plików JavaScript.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "Otaczające wyliczenia ze specyfikacją const nie są dozwolone w przypadku podania flagi „--isolatedModules”.",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Klasa „{0}” została użyta przed zadeklarowaniem.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Deklaracje klas nie mogą mieć więcej niż jeden tag „@augments” lub „@extends”.",
   "Class_name_cannot_be_0_2414": "Klasa nie może mieć nazwy „{0}”.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Nazwą klasy nie może być słowo „Object”, gdy docelowym językiem jest ES5 z modułem {0}.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "Strona statyczna klasy „{0}” niepoprawnie rozszerza stronę statyczną klasy bazowej „{1}”.",
   "Classes_can_only_extend_a_single_class_1174": "Klasy mogą rozszerzać tylko pojedynczą klasę.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Klasy zawierające metody abstrakcyjne muszą być oznaczone jako abstrakcyjne.",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "Konstruktor klasy „{0}” jest chroniony i dostępny tylko w ramach deklaracji klasy.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Konstruktory klas pochodnych muszą zawierać wywołanie „super”.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Nie podano pliku zawierającego i nie można określić katalogu głównego. Pomijanie wyszukiwania w folderze „node_modules”.",
+  "Convert_0_to_mapped_object_type_95055": "Konwertuj element „{0}” na zamapowany typ obiektu",
   "Convert_all_constructor_functions_to_classes_95045": "Przekonwertuj wszystkie funkcje konstruktora na klasy",
   "Convert_all_require_to_import_95048": "Konwertuj wszystkie wywołania „require” na wywołania „import”",
   "Convert_all_to_default_imports_95035": "Przekonwertuj wszystko na domyślne importowanie",
   "Convert_function_0_to_class_95002": "Konwertuj funkcję „{0}” na klasę",
   "Convert_function_to_an_ES2015_class_95001": "Konwertuj funkcję na klasę ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Konwertuj importy nazwane na import przestrzeni nazw",
+  "Convert_namespace_import_to_named_imports_95056": "Konwertuj import przestrzeni nazw na importy nazwane",
   "Convert_require_to_import_95047": "Konwertuj wywołanie „require” na wywołanie „import”",
   "Convert_to_ES6_module_95017": "Konwertuj na moduł ES6",
   "Convert_to_default_import_95013": "Konwertuj na import domyślny",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "Nie wszystkie ścieżki kodu zwracają wartość.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "Nie można przypisać typu indeksu numerycznego „{0}” do typu indeksu ciągu „{1}”.",
   "Numeric_separators_are_not_allowed_here_6188": "Separatory liczbowe nie są dozwolone w tym miejscu.",
+  "Object_is_of_type_unknown_2571": "Obiekt jest typu „nieznany”.",
   "Object_is_possibly_null_2531": "Obiekt ma prawdopodobnie wartość „null”.",
   "Object_is_possibly_null_or_undefined_2533": "Obiekt ma prawdopodobnie wartość „null” lub „undefined”.",
   "Object_is_possibly_undefined_2532": "Obiekt ma prawdopodobnie wartość „undefined”.",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Przekieruj strukturę wyjściową do katalogu.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Przywoływany projekt „{0}” musi mieć ustawienie „composite” o wartości true.",
   "Remove_all_unreachable_code_95051": "Usuń cały nieosiągalny kod",
+  "Remove_all_unused_labels_95054": "Usuń wszystkie nieużywane etykiety",
   "Remove_declaration_for_Colon_0_90004": "Usuń deklarację dla: „{0}”",
   "Remove_destructuring_90009": "Usuń usuwanie struktury",
   "Remove_import_from_0_90005": "Usuń import z „{0}”",
   "Remove_unreachable_code_95050": "Usuń nieosiągalny kod",
+  "Remove_unused_label_95053": "Usuń nieużywaną etykietę",
+  "Remove_variable_statement_90010": "Usuń instrukcję zmiennej",
   "Replace_import_with_0_95015": "Zamień import na element „{0}”.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Zgłoś błąd, gdy nie wszystkie ścieżki kodu zwracają wartość.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Zgłoś błędy dla przepuszczających klauzul case w instrukcji switch.",

lib/protocol.d.ts

@@ -3,6 +3,7 @@
  */
 declare namespace ts.server.protocol {
     const enum CommandTypes {
+        JsxClosingTag = "jsxClosingTag",
         Brace = "brace",
         BraceCompletion = "braceCompletion",
         GetSpanOfEnclosingComment = "getSpanOfEnclosingComment",
@@ -672,6 +673,15 @@ declare namespace ts.server.protocol {
          */
         openingBrace: string;
     }
+    interface JsxClosingTagRequest extends FileLocationRequest {
+        readonly command: CommandTypes.JsxClosingTag;
+        readonly arguments: JsxClosingTagRequestArgs;
+    }
+    interface JsxClosingTagRequestArgs extends FileLocationRequestArgs {
+    }
+    interface JsxClosingTagResponse extends Response {
+        readonly body: TextInsertion;
+    }
     /**
      * @deprecated
      * Get occurrences request; value of command field is
@@ -1363,7 +1373,7 @@ declare namespace ts.server.protocol {
     }
     interface CompletionEntryIdentifier {
         name: string;
-        source: string;
+        source?: string;
     }
     /**
      * Completion entry details request; value of command field is
@@ -1403,7 +1413,7 @@ declare namespace ts.server.protocol {
         /**
          * Optional modifiers for the kind (such as 'public').
          */
-        kindModifiers: string;
+        kindModifiers?: string;
         /**
          * A string that is used for comparing completion items so that they can be ordered.  This
          * is often the same as the name but may be different in certain circumstances.
@@ -1460,11 +1470,11 @@ declare namespace ts.server.protocol {
         /**
          * Documentation strings for the symbol.
          */
-        documentation: SymbolDisplayPart[];
+        documentation?: SymbolDisplayPart[];
         /**
          * JSDoc tags for the symbol.
          */
-        tags: JSDocTagInfo[];
+        tags?: JSDocTagInfo[];
         /**
          * The associated code actions for this entry
          */

lib/pt-br/diagnosticMessages.generated.json

@@ -106,7 +106,7 @@
   "Add_initializer_to_property_0_95019": "Adicionar inicializador à propriedade '{0}'",
   "Add_initializers_to_all_uninitialized_properties_95027": "Adicionar inicializadores a todas as propriedades não inicializadas",
   "Add_missing_super_call_90001": "Adicionar chamada 'super()' ausente",
-  "Add_missing_typeof_95052": "Adicionar typeof ausente",
+  "Add_missing_typeof_95052": "Adicionar 'typeof' ausente",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Adicionar um qualificador a todas as variáveis não resolvidas correspondentes a um nome de membro",
   "Add_to_all_uncalled_decorators_95044": "Adicionar '()' a todos os decoradores não chamados",
   "Add_ts_ignore_to_all_error_messages_95042": "Adicionar '@ts-ignore' a todas as mensagens de erro",
@@ -120,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Todas as declarações de um método abstrato devem ser consecutivas.",
   "All_destructured_elements_are_unused_6198": "Todos os elementos desestruturados são inutilizados.",
   "All_imports_in_import_declaration_are_unused_6192": "Nenhuma das importações na declaração de importação está sendo utilizada.",
+  "All_variables_are_unused_6199": "Nenhuma das variáveis está sendo utilizada.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Permita importações padrão de módulos sem exportação padrão. Isso não afeta a emissão do código, apenas a verificação de digitação.",
   "Allow_javascript_files_to_be_compiled_6102": "Permita que arquivos javascript sejam compilados.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "As enumerações de constante de ambiente não são permitidas quando o sinalizador '--isolatedModules' é fornecido.",
@@ -256,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Classe '{0}' usada antes de sua declaração.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Declarações de classe não podem ter mais de uma marca `@augments` ou `@extends`.",
   "Class_name_cannot_be_0_2414": "O nome de classe não pode ser '{0}'.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "O nome da classe não pode ser 'Object' ao direcionar ES5 com módulo {0}.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "O lado estático da classe '{0}' incorretamente estende o lado estático da classe base '{1}'.",
   "Classes_can_only_extend_a_single_class_1174": "Classes só podem estender uma única classe.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "As classes que contêm métodos abstratos devem ser marcadas como abstratas.",
@@ -274,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "O construtor de classe '{0}' é protegido e somente acessível na declaração de classe.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Construtores para classes derivadas devem conter uma chamada 'super'.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "O arquivo contido não foi especificado e o diretório raiz não pode ser determinado, ignorando a pesquisa na pasta 'node_modules'.",
+  "Convert_0_to_mapped_object_type_95055": "Converter '{0}' para o tipo de objeto mapeado",
   "Convert_all_constructor_functions_to_classes_95045": "Converter todas as funções de construtor em classes",
   "Convert_all_require_to_import_95048": "Converter todos os 'require' em 'import'",
   "Convert_all_to_default_imports_95035": "Converter tudo para importações padrão",
   "Convert_function_0_to_class_95002": "Converter função '{0}' em classe",
   "Convert_function_to_an_ES2015_class_95001": "Converter função em uma classe ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Converter importações nomeadas em importação de namespace",
+  "Convert_namespace_import_to_named_imports_95056": "Converter importação de namespace em importações nomeadas",
   "Convert_require_to_import_95047": "Converter 'require' em 'import'",
   "Convert_to_ES6_module_95017": "Converter em módulo ES6",
   "Convert_to_default_import_95013": "Converter para importação padrão",
@@ -581,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "Nem todos os caminhos de código retornam um valor.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "O tipo de índice numérico '{0}' não é atribuível ao tipo de índice de cadeia de caracteres '{1}'.",
   "Numeric_separators_are_not_allowed_here_6188": "Separadores numéricos não são permitidos aqui.",
+  "Object_is_of_type_unknown_2571": "O objeto é do tipo 'desconhecido'.",
   "Object_is_possibly_null_2531": "Possivelmente, o objeto é 'nulo'.",
   "Object_is_possibly_null_or_undefined_2533": "Possivelmente, o objeto é 'nulo' ou 'indefinido'.",
   "Object_is_possibly_undefined_2532": "Possivelmente, o objeto é 'nulo'.",
@@ -709,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Redirecione a estrutura de saída para o diretório.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "O projeto referenciado '{0}' deve ter a configuração de \"composite\": true.",
   "Remove_all_unreachable_code_95051": "Remover todo o código inacessível",
+  "Remove_all_unused_labels_95054": "Remover todos os rótulos não utilizados",
   "Remove_declaration_for_Colon_0_90004": "Remover declaração para: '{0}'",
   "Remove_destructuring_90009": "Remover desestruturação",
   "Remove_import_from_0_90005": "Remover importação do '{0}'",
   "Remove_unreachable_code_95050": "Remover código inacessível",
+  "Remove_unused_label_95053": "Remover rótulo não utilizado",
+  "Remove_variable_statement_90010": "Remover instrução de variável",
   "Replace_import_with_0_95015": "Substitua a importação com '{0}'.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Relate erro quando nem todos os caminhos de código na função retornarem um valor.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Relate erros para casos de fallthrough na instrução switch.",

lib/ru/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "Добавить инициализатор к свойству \"{0}\"",
   "Add_initializers_to_all_uninitialized_properties_95027": "Добавить инициализаторы ко всем неинициализированным свойствам",
   "Add_missing_super_call_90001": "Добавьте отсутствующий вызов \"super()\"",
+  "Add_missing_typeof_95052": "Добавить отсутствующий \"typeof\"",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Добавить квалификатор ко всем неразрешенным переменным, соответствующим имени члена",
   "Add_to_all_uncalled_decorators_95044": "Добавить \"()\" ко всем невызванным декораторам",
   "Add_ts_ignore_to_all_error_messages_95042": "Добавить \"@ts-ignore\" ко всем сообщениям об ошибках",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Все объявления абстрактных методов должны быть последовательными.",
   "All_destructured_elements_are_unused_6198": "Все деструктурированные элементы не используются.",
   "All_imports_in_import_declaration_are_unused_6192": "Ни один из импортов в объявлении импорта не используется.",
+  "All_variables_are_unused_6199": "Ни одна переменная не используется.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Разрешить импорт по умолчанию из модулей без экспорта по умолчанию. Это не повлияет на выведение кода — только на проверку типов.",
   "Allow_javascript_files_to_be_compiled_6102": "Разрешить компиляцию файлов javascript.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "Перечисление внешних констант не разрешено, если задан флаг \"--isolatedModules\".",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "Класс \"{0}\" использован прежде, чем объявлен.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "В объявлении класса не может использоваться более одного тега \"@augments\" или \"@extends\".",
   "Class_name_cannot_be_0_2414": "Имя класса не может иметь значение \"{0}\".",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Класс не может иметь имя \"Object\" при выборе ES5 с модулем {0} в качестве целевого.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "Статическая сторона класса \"{0}\" неправильно расширяет статическую сторону базового класса \"{1}\".",
   "Classes_can_only_extend_a_single_class_1174": "Классы могут расширить только один класс.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Классы, содержащие абстрактные методы, должны быть отмечены как абстрактные.",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "Конструктор класса \"{0}\" защищен и доступен только в объявлении класса.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Конструкторы производных классов должны содержать вызов super.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Содержащий файл не указан, корневой каталог невозможно определить. Выполняется пропуск поиска в папке node_modules.",
+  "Convert_0_to_mapped_object_type_95055": "Преобразовать \"{0}\" в тип сопоставленного объекта",
   "Convert_all_constructor_functions_to_classes_95045": "Преобразовать все функции конструктора в классы",
   "Convert_all_require_to_import_95048": "Преобразовать все \"require\" в \"import\"",
   "Convert_all_to_default_imports_95035": "Преобразовать все в импорт по умолчанию",
   "Convert_function_0_to_class_95002": "Преобразование функции \"{0}\" в класс",
   "Convert_function_to_an_ES2015_class_95001": "Преобразование функции в класс ES2015",
+  "Convert_named_imports_to_namespace_import_95057": "Преобразовать операции импорта имен в импорт пространства имен",
+  "Convert_namespace_import_to_named_imports_95056": "Преобразовать импорт пространства имен в операции импорта имен",
   "Convert_require_to_import_95047": "Преобразовать \"require\" в \"import\"",
   "Convert_to_ES6_module_95017": "Преобразовать в модуль ES6",
   "Convert_to_default_import_95013": "Преобразовать в импорт по умолчанию",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "Не все пути кода возвращают значение.",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "Тип числового индекса \"{0}\" нельзя назначить типу строкового индекса \"{1}\".",
   "Numeric_separators_are_not_allowed_here_6188": "Числовые разделители здесь запрещены.",
+  "Object_is_of_type_unknown_2571": "Объект имеет тип \"Неизвестный\".",
   "Object_is_possibly_null_2531": "Возможно, объект равен null.",
   "Object_is_possibly_null_or_undefined_2533": "Возможно, объект равен null или undefined.",
   "Object_is_possibly_undefined_2532": "Возможно, объект равен undefined.",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Перенаправить структуру вывода в каталог.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Указанный в ссылке проект \"{0}\" должен иметь следующее значение параметра composite: true.",
   "Remove_all_unreachable_code_95051": "Удалить весь недостижимый код",
+  "Remove_all_unused_labels_95054": "Удалить все неиспользуемые метки",
   "Remove_declaration_for_Colon_0_90004": "Удалите объявление: \"{0}\"",
   "Remove_destructuring_90009": "Удалить деструктурирование",
   "Remove_import_from_0_90005": "Удалить импорт из \"{0}\"",
   "Remove_unreachable_code_95050": "Удалить недостижимый код",
+  "Remove_unused_label_95053": "Удалить неиспользуемую метку",
+  "Remove_variable_statement_90010": "Удалить оператор с переменной",
   "Replace_import_with_0_95015": "Замена импорта на \"{0}\".",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "Сообщать об ошибке, если не все пути кода в функции возвращают значение.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "Сообщать об ошибках для случаев передачи управления в операторе switch.",

lib/tr/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "'{0}' özelliğine başlatıcı ekle",
   "Add_initializers_to_all_uninitialized_properties_95027": "Tüm başlatılmamış özelliklere başlatıcılar ekle",
   "Add_missing_super_call_90001": "Eksik 'super()' çağrısını ekle",
+  "Add_missing_typeof_95052": "Eksik 'typeof' öğesini ekle",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "Bir üye adıyla eşleşen tüm çözülmemiş değişkenlere niteleyici ekle",
   "Add_to_all_uncalled_decorators_95044": "Çağrılmayan tüm dekoratörlere '()' ekle",
   "Add_ts_ignore_to_all_error_messages_95042": "Tüm hata iletilerine '@ts-ignore' ekle",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "Soyut metoda ait tüm bildirimler ardışık olmalıdır.",
   "All_destructured_elements_are_unused_6198": "Yok edilen öğelerin hiçbiri kullanılmamış.",
   "All_imports_in_import_declaration_are_unused_6192": "İçeri aktarma bildirimindeki hiçbir içeri aktarma kullanılmadı.",
+  "All_variables_are_unused_6199": "Hiçbir değişken kullanılmıyor.",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "Varsayılan dışarı aktarmaya sahip olmayan modüllerde varsayılan içeri aktarmalara izin verin. Bu işlem kod üretimini etkilemez, yalnızca tür denetimini etkiler.",
   "Allow_javascript_files_to_be_compiled_6102": "Javascript dosyalarının derlenmesine izin ver.",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "'--isolatedModules' bayrağı sağlandığında çevresel const sabit listesi değerlerine izin verilmez.",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "'{0}' sınıfı, bildiriminden önce kullanıldı.",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "Sınıf bildirimlerinde birden fazla `@augments` veya `@extends` etiketi olamaz.",
   "Class_name_cannot_be_0_2414": "Sınıf adı '{0}' olamaz.",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "Modül {0} ile ES5 hedeflendiğinde sınıf adı 'Object' olamaz.",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "'{0}' statik sınıf tarafı, '{1}' statik temel sınıf tarafını yanlış genişletiyor.",
   "Classes_can_only_extend_a_single_class_1174": "Sınıflar yalnızca bir sınıfı genişletebilir.",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "Soyut metotlar içeren sınıflar abstract olarak işaretlenmelidir.",
@@ -273,6 +276,7 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "'{0}' sınıfının oluşturucusu korumalı olduğundan, oluşturucuya yalnızca sınıf bildiriminden erişilebilir.",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "Türetilmiş sınıflara ilişkin oluşturucular bir 'super' çağrısı içermelidir.",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "Kapsayıcı dosya belirtilmedi ve kök dizini belirlenemiyor; 'node_modules' klasöründe arama atlanıyor.",
+  "Convert_0_to_mapped_object_type_95055": "'{0}' öğesini eşlenen nesne türüne dönüştür",
   "Convert_all_constructor_functions_to_classes_95045": "Tüm oluşturucu işlevleri sınıflara dönüştür",
   "Convert_all_require_to_import_95048": "Tüm 'require' öğelerini 'import' olarak dönüştür",
   "Convert_all_to_default_imports_95035": "Tümünü varsayılan içeri aktarmalara dönüştür",
@@ -708,10 +712,13 @@
   "Redirect_output_structure_to_the_directory_6006": "Çıktı yapısını dizine yeniden yönlendir.",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "Başvurulan proje '{0}' \"composite\": true ayarına sahip olmalıdır.",
   "Remove_all_unreachable_code_95051": "Tüm erişilemeyen kodları kaldır",
+  "Remove_all_unused_labels_95054": "Kullanılmayan tüm etiketleri kaldır",
   "Remove_declaration_for_Colon_0_90004": "'{0}' bildirimini kaldır",
   "Remove_destructuring_90009": "Yıkmayı kaldır",
   "Remove_import_from_0_90005": "'{0}' öğesinden içeri aktarmayı kaldır",
   "Remove_unreachable_code_95050": "Erişilemeyen kodları kaldır",
+  "Remove_unused_label_95053": "Kullanılmayan etiketi kaldır",
+  "Remove_variable_statement_90010": "Değişken deyimini kaldır",
   "Replace_import_with_0_95015": "İçeri aktarma işlemini '{0}' ile değiştirin.",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "İşlevdeki tüm kod yolları bir değer döndürmediğinde hata bildir.",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "switch deyiminde sonraki ifadelere geçiş ile ilgili hataları bildir.",

lib/zh-cn/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "向属性“{0}”添加初始值设定项",
   "Add_initializers_to_all_uninitialized_properties_95027": "将初始化表达式添加到未初始化的所有属性",
   "Add_missing_super_call_90001": "添加缺失的 \"super()\" 调用",
+  "Add_missing_typeof_95052": "添加缺少的 \"typeof\"",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "将限定符添加到匹配成员名称的所有未解析变量",
   "Add_to_all_uncalled_decorators_95044": "将 \"()\" 添加到所有未调用的修饰器",
   "Add_ts_ignore_to_all_error_messages_95042": "将 \"@ts-ignore\" 添加到所有错误消息",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "抽象方法的所有声明必须是连续的。",
   "All_destructured_elements_are_unused_6198": "未取消使用任何解构元素。",
   "All_imports_in_import_declaration_are_unused_6192": "未使用导入声明中的所有导入。",
+  "All_variables_are_unused_6199": "所有变量均未使用。",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "允许从不带默认输出的模块中默认输入。这不会影响代码发出，只是类型检查。",
   "Allow_javascript_files_to_be_compiled_6102": "允许编译 JavaScript 文件。",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "提供 \"--isolatedModules\" 标志的情况下不允许使用环境常数枚举。",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "类“{0}”用于其声明前。",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "类声明不能有多个 \"@augments\" 或 \"@extends\" 标记。",
   "Class_name_cannot_be_0_2414": "类名不能为“{0}”。",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "使用模块 {0} 将目标设置为 ES5 时，类名称不能为 \"Object\"。",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "类静态侧“{0}”错误扩展基类静态侧“{1}”。",
   "Classes_can_only_extend_a_single_class_1174": "类只能扩展一个类。",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "包含抽象方法的类必须标记为抽象。",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "类“{0}”的构造函数是受保护的，仅可在类声明中访问。",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "派生类的构造函数必须包含 \"super\" 调用。",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "未指定包含文件，并且无法确定根目录，正在跳过在 \"node_modules\" 文件夹中查找。",
+  "Convert_0_to_mapped_object_type_95055": "将“{0}”转换为映射对象类型",
   "Convert_all_constructor_functions_to_classes_95045": "将所有构造函数都转换为类",
   "Convert_all_require_to_import_95048": "将所有 \"require\" 转换为 \"import\"",
   "Convert_all_to_default_imports_95035": "全部转换为默认导入",
   "Convert_function_0_to_class_95002": "将函数“{0}”转换为类",
   "Convert_function_to_an_ES2015_class_95001": "将函数转换为 ES2015 类",
+  "Convert_named_imports_to_namespace_import_95057": "将命名导入转换为命名空间导入",
+  "Convert_namespace_import_to_named_imports_95056": "将命名空间导入转换为命名导入",
   "Convert_require_to_import_95047": "将 \"require\" 转换为 \"import\"",
   "Convert_to_ES6_module_95017": "转换为 ES6 模块",
   "Convert_to_default_import_95013": "转换为默认导入",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "并非所有代码路径都返回值。",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "数字索引类型“{0}”不能赋给字符串索引类型“{1}”。",
   "Numeric_separators_are_not_allowed_here_6188": "此处不允许使用数字分隔符。",
+  "Object_is_of_type_unknown_2571": "对象的类型为 \"unknown\"。",
   "Object_is_possibly_null_2531": "对象可能为 \"null\"。",
   "Object_is_possibly_null_or_undefined_2533": "对象可能为 \"null\" 或“未定义”。",
   "Object_is_possibly_undefined_2532": "对象可能为“未定义”。",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "将输出结构重定向到目录。",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "引用的项目“{0}”必须拥有设置 \"composite\": true。",
   "Remove_all_unreachable_code_95051": "删除所有无法访问的代码",
+  "Remove_all_unused_labels_95054": "删除所有未使用的标签",
   "Remove_declaration_for_Colon_0_90004": "删除“{0}”的声明",
   "Remove_destructuring_90009": "删除解构",
   "Remove_import_from_0_90005": "从“{0}”删除导入",
   "Remove_unreachable_code_95050": "删除无法访问的代码",
+  "Remove_unused_label_95053": "删除未使用的标签",
+  "Remove_variable_statement_90010": "删除变量语句",
   "Replace_import_with_0_95015": "用“{0}”替换导入。",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "在函数中的所有代码路径并非都返回值时报告错误。",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "报告 switch 语句中遇到 fallthrough 情况的错误。",

lib/zh-tw/diagnosticMessages.generated.json

@@ -106,6 +106,7 @@
   "Add_initializer_to_property_0_95019": "將初始設定式新增至屬性 '{0}'",
   "Add_initializers_to_all_uninitialized_properties_95027": "為所有未初始化的屬性新增初始設定式",
   "Add_missing_super_call_90001": "新增遺漏的 'super()' 呼叫",
+  "Add_missing_typeof_95052": "新增遺漏的 'typeof'",
   "Add_qualifier_to_all_unresolved_variables_matching_a_member_name_95037": "對所有比對成員名稱的未解析變數新增限定詞",
   "Add_to_all_uncalled_decorators_95044": "為所有未呼叫的裝飾項目新增 '()'",
   "Add_ts_ignore_to_all_error_messages_95042": "為所有錯誤訊息新增 '@ts-ignore'",
@@ -119,6 +120,7 @@
   "All_declarations_of_an_abstract_method_must_be_consecutive_2516": "抽象方法的所有宣告必須連續。",
   "All_destructured_elements_are_unused_6198": "不會使用所有未經結構化的項目。",
   "All_imports_in_import_declaration_are_unused_6192": "匯入宣告中的所有匯入皆未使用。",
+  "All_variables_are_unused_6199": "所有變數都未使用。",
   "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011": "允許從沒有預設匯出的模組進行預設匯入。這不會影響程式碼發出，僅為類型檢查。",
   "Allow_javascript_files_to_be_compiled_6102": "允許編譯 JavaScript 檔案。",
   "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209": "提供 '--isolatedModules' 旗標時，不可使用環境常數列舉。",
@@ -255,6 +257,7 @@
   "Class_0_used_before_its_declaration_2449": "類別 '{0}' 的位置在其宣告之前。",
   "Class_declarations_cannot_have_more_than_one_augments_or_extends_tag_8025": "類別宣告只可有一個 '@augments' 或 '@extends' 標記。",
   "Class_name_cannot_be_0_2414": "類別名稱不得為 '{0}'。",
+  "Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725": "當目標為具有模組 {0} 的 ES5 時，類別名稱不可為 'Object'。",
   "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417": "類別靜態端 '{0}' 不正確地擴充基底類別靜態端 '{1}'。",
   "Classes_can_only_extend_a_single_class_1174": "類別只能擴充一個類別。",
   "Classes_containing_abstract_methods_must_be_marked_abstract_2514": "包含抽象方法的類別必須標記為抽象。",
@@ -273,11 +276,14 @@
   "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674": "類別 '{0}' 的建構函式受到保護，並且只能在類別宣告內存取。",
   "Constructors_for_derived_classes_must_contain_a_super_call_2377": "衍生類別的建構函式必須包含 'super' 呼叫。",
   "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126": "未指定包含檔案，因此無法決定根目錄，而將略過 'node_modules' 中的查閱。",
+  "Convert_0_to_mapped_object_type_95055": "將 '{0}' 轉換為對應的物件類型",
   "Convert_all_constructor_functions_to_classes_95045": "將所有建構函式轉換為類別",
   "Convert_all_require_to_import_95048": "將所有 'require' 轉換至 'import'",
   "Convert_all_to_default_imports_95035": "全部轉換為預設匯入",
   "Convert_function_0_to_class_95002": "將函式 '{0}' 轉換為類別",
   "Convert_function_to_an_ES2015_class_95001": "將函式轉換為 ES2015 類別",
+  "Convert_named_imports_to_namespace_import_95057": "將具名匯入轉換為命名空間匯入",
+  "Convert_namespace_import_to_named_imports_95056": "將命名空間匯入轉換為具名匯入",
   "Convert_require_to_import_95047": "將 'require' 轉換至 'import'",
   "Convert_to_ES6_module_95017": "轉換為 ES6 模組",
   "Convert_to_default_import_95013": "轉換為預設匯入",
@@ -580,6 +586,7 @@
   "Not_all_code_paths_return_a_value_7030": "部分程式碼路徑並未傳回值。",
   "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413": "數值索引類型 '{0}' 不可指派給字串索引類型 '{1}'。",
   "Numeric_separators_are_not_allowed_here_6188": "這裡不允許數字分隔符號。",
+  "Object_is_of_type_unknown_2571": "物件的類型為 '未知'。",
   "Object_is_possibly_null_2531": "物件可能為「null」。",
   "Object_is_possibly_null_or_undefined_2533": "物件可能為「null」或「未定義」。",
   "Object_is_possibly_undefined_2532": "物件可能為「未定義」。",
@@ -708,10 +715,13 @@
   "Redirect_output_structure_to_the_directory_6006": "將輸出結構重新導向至目錄。",
   "Referenced_project_0_must_have_setting_composite_Colon_true_6306": "參考的專案 '{0}' 之設定 \"composite\" 必須為 true。",
   "Remove_all_unreachable_code_95051": "移除所有無法連線的程式碼",
+  "Remove_all_unused_labels_95054": "移除所有未使用的標籤",
   "Remove_declaration_for_Colon_0_90004": "移除 '{0}' 的宣告",
   "Remove_destructuring_90009": "移除解構",
   "Remove_import_from_0_90005": "從 '{0}' 移除匯入",
   "Remove_unreachable_code_95050": "移除無法連線的程式碼",
+  "Remove_unused_label_95053": "移除未使用的標籤",
+  "Remove_variable_statement_90010": "移除變數陳述式",
   "Replace_import_with_0_95015": "以 '{0}' 取代匯入。",
   "Report_error_when_not_all_code_paths_in_function_return_a_value_6075": "當函式中的部分程式碼路徑並未傳回值時回報錯誤。",
   "Report_errors_for_fallthrough_cases_in_switch_statement_6076": "回報 switch 陳述式內 fallthrough 案例的錯誤。",

scripts/build/gulp-typescript-oop.js

@@ -0,0 +1,88 @@
+// @ts-check
+const path = require("path");
+const child_process = require("child_process");
+const tsc = require("gulp-typescript");
+const Vinyl = require("vinyl");
+const { Duplex, Readable } = require("stream");
+
+/**
+ * @param {string} tsConfigFileName
+ * @param {tsc.Settings} settings
+ * @param {Object} options
+ * @param {string} [options.typescript]
+ */
+function createProject(tsConfigFileName, settings, options) {
+    settings = { ...settings };
+    options = { ...options };
+    if (settings.typescript) throw new Error();
+
+    const localSettings = { ...settings };
+    if (options.typescript) {
+        options.typescript = path.resolve(options.typescript);
+        localSettings.typescript = require(options.typescript);
+    }
+
+    const project = tsc.createProject(tsConfigFileName, localSettings);
+    const wrappedProject = /** @type {tsc.Project} */(() => {
+        const proc = child_process.fork(require.resolve("./main.js"));
+        /** @type {Duplex & { js?: Readable, dts?: Readable }} */
+        const compileStream = new Duplex({
+            objectMode: true,
+            read() {},
+            /** @param {*} file */
+            write(file, encoding, callback) {
+                proc.send({ method: "write", params: { path: file.path, cwd: file.cwd, base: file.base }});
+                callback();
+            },
+            final(callback) {
+                proc.send({ method: "final" });
+                callback();
+            }
+        });
+        const jsStream = compileStream.js = new Readable({
+            objectMode: true,
+            read() {}
+        });
+        const dtsStream = compileStream.dts = new Readable({
+            objectMode: true,
+            read() {}
+        });
+        proc.send({ method: "createProject", params: { tsConfigFileName, settings, options } });
+        proc.on("message", ({ method, params }) => {
+            if (method === "write") {
+                const file = new Vinyl({
+                    path: params.path,
+                    cwd: params.cwd,
+                    base: params.base,
+                    contents: Buffer.from(params.contents, "utf8")
+                });
+                if (params.sourceMap) file.sourceMap = params.sourceMap
+                compileStream.push(file);;
+                if (file.path.endsWith(".d.ts")) {
+                    dtsStream.push(file);
+                }
+                else {
+                    jsStream.push(file);
+                }
+            }
+            else if (method === "final") {
+                compileStream.push(null);
+                jsStream.push(null);
+                dtsStream.push(null);
+                proc.kill();
+            }
+            else if (method === "error") {
+                const error = new Error();
+                error.name = params.name;
+                error.message = params.message;
+                error.stack = params.stack;
+                compileStream.emit("error", error);
+                proc.kill();
+            }
+        });
+        return /** @type {*} */(compileStream);
+    });
+    return Object.assign(wrappedProject, project);
+}
+
+exports.createProject = createProject;

scripts/build/main.js

@@ -0,0 +1,91 @@
+// @ts-check
+const path = require("path");
+const fs = require("fs");
+const tsc = require("gulp-typescript");
+const Vinyl = require("vinyl");
+const { Readable, Writable } = require("stream");
+
+/** @type {tsc.Project} */
+let project;
+
+/** @type {Readable} */
+let inputStream;
+
+/** @type {Writable} */
+let outputStream;
+
+/** @type {tsc.CompileStream} */
+let compileStream;
+
+process.on("message", ({ method, params }) => {
+    try {
+        if (method === "createProject") {
+            const { tsConfigFileName, settings, options } = params;
+            if (options.typescript) {
+                settings.typescript = require(options.typescript);
+            }
+            project = tsc.createProject(tsConfigFileName, settings);
+            inputStream = new Readable({
+                objectMode: true,
+                read() {}
+            });
+            outputStream = new Writable({
+                objectMode: true,
+                /**
+                 * @param {*} file
+                 */
+                write(file, encoding, callback) {
+                    process.send({
+                        method: "write",
+                        params: {
+                            path: file.path,
+                            cwd: file.cwd,
+                            base: file.base,
+                            contents: file.contents.toString(),
+                            sourceMap: file.sourceMap
+                        }
+                    });
+                    callback();
+                },
+                final(callback) {
+                    process.send({ method: "final" });
+                    callback();
+                }
+            });
+            outputStream.on("error", error => {
+                process.send({
+                    method: "error",
+                    params: {
+                        name: error.name,
+                        message: error.message,
+                        stack: error.stack
+                    }
+                });
+            });
+            compileStream = project();
+            inputStream.pipe(compileStream).pipe(outputStream);
+        }
+        else if (method === "write") {
+            const file = new Vinyl({
+                path: params.path,
+                cwd: params.cwd,
+                base: params.base
+            });
+            file.contents = fs.readFileSync(file.path);
+            inputStream.push(/** @type {*} */(file));
+        }
+        else if (method === "final") {
+            inputStream.push(null);
+        }
+    }
+    catch (e) {
+        process.send({
+            method: "error",
+            params: {
+                name: e.name,
+                message: e.message,
+                stack: e.stack
+            }
+        });
+    }
+});

src/compiler/binder.ts

@@ -1698,6 +1698,7 @@ namespace ts {
                 symbol.parent = container.symbol;
             }
             addDeclarationToSymbol(symbol, node, symbolFlags);
+            return symbol;
         }
 
         function bindBlockScopedDeclaration(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags) {
@@ -2317,13 +2318,11 @@ namespace ts {
             // expression is the declaration
             setCommonJsModuleIndicator(node);
             const lhs = node.left as PropertyAccessEntityNameExpression;
-            const symbol = forEachIdentifierInEntityName(lhs.expression, (id, original) => {
-                if (!original) {
-                    return undefined;
+            const symbol = forEachIdentifierInEntityName(lhs.expression, /*parent*/ undefined, (id, symbol) => {
+                if (symbol) {
+                    addDeclarationToSymbol(symbol, id, SymbolFlags.Module | SymbolFlags.JSContainer);
                 }
-                const s = getJSInitializerSymbol(original)!;
-                addDeclarationToSymbol(s, id, SymbolFlags.Module | SymbolFlags.JSContainer);
-                return s;
+                return symbol;
             });
             if (symbol) {
                 const flags = isClassExpression(node.right) ?
@@ -2359,12 +2358,12 @@ namespace ts {
             switch (thisContainer.kind) {
                 case SyntaxKind.FunctionDeclaration:
                 case SyntaxKind.FunctionExpression:
-                    let constructorSymbol = thisContainer.symbol;
+                    let constructorSymbol: Symbol | undefined = thisContainer.symbol;
                     // For `f.prototype.m = function() { this.x = 0; }`, `this.x = 0` should modify `f`'s members, not the function expression.
                     if (isBinaryExpression(thisContainer.parent) && thisContainer.parent.operatorToken.kind === SyntaxKind.EqualsToken) {
                         const l = thisContainer.parent.left;
                         if (isPropertyAccessEntityNameExpression(l) && isPrototypeAccess(l.expression)) {
-                            constructorSymbol = getJSInitializerSymbolFromName(l.expression.expression, thisParentContainer)!;
+                            constructorSymbol = lookupSymbolForPropertyAccess(l.expression.expression, thisParentContainer);
                         }
                     }
 
@@ -2463,46 +2462,68 @@ namespace ts {
             bindPropertyAssignment(node.expression, node, /*isPrototypeProperty*/ false);
         }
 
-        function getJSInitializerSymbolFromName(name: EntityNameExpression, lookupContainer?: Node): Symbol | undefined {
-            return getJSInitializerSymbol(lookupSymbolForPropertyAccess(name, lookupContainer));
-        }
-
         function bindPropertyAssignment(name: EntityNameExpression, propertyAccess: PropertyAccessEntityNameExpression, isPrototypeProperty: boolean) {
-            let symbol = getJSInitializerSymbolFromName(name);
+            let namespaceSymbol = lookupSymbolForPropertyAccess(name);
             const isToplevelNamespaceableInitializer = isBinaryExpression(propertyAccess.parent)
                 ? getParentOfBinaryExpression(propertyAccess.parent).parent.kind === SyntaxKind.SourceFile &&
                     !!getJavascriptInitializer(getInitializerOfBinaryExpression(propertyAccess.parent), isPrototypeAccess(propertyAccess.parent.left))
                 : propertyAccess.parent.parent.kind === SyntaxKind.SourceFile;
-            if (!isPrototypeProperty && (!symbol || !(symbol.flags & SymbolFlags.Namespace)) && isToplevelNamespaceableInitializer) {
+            if (!isPrototypeProperty && (!namespaceSymbol || !(namespaceSymbol.flags & SymbolFlags.Namespace)) && isToplevelNamespaceableInitializer) {
                 // make symbols or add declarations for intermediate containers
                 const flags = SymbolFlags.Module | SymbolFlags.JSContainer;
                 const excludeFlags = SymbolFlags.ValueModuleExcludes & ~SymbolFlags.JSContainer;
-                forEachIdentifierInEntityName(propertyAccess.expression, (id, original) => {
-                    if (original) {
-                        // Note: add declaration to original symbol, not the special-syntax's symbol, so that namespaces work for type lookup
-                        addDeclarationToSymbol(original, id, flags);
-                        return original;
+                namespaceSymbol = forEachIdentifierInEntityName(propertyAccess.expression, namespaceSymbol, (id, symbol, parent) => {
+                    if (symbol) {
+                        addDeclarationToSymbol(symbol, id, flags);
+                        return symbol;
                     }
                     else {
-                        return symbol = declareSymbol(symbol ? symbol.exports! : container.locals!, symbol, id, flags, excludeFlags);
+                        return declareSymbol(parent ? parent.exports! : container.locals!, parent, id, flags, excludeFlags);
                     }
                 });
             }
-            if (!symbol || !(symbol.flags & (SymbolFlags.Function | SymbolFlags.Class | SymbolFlags.NamespaceModule | SymbolFlags.ObjectLiteral))) {
+            if (!namespaceSymbol || !isJavascriptContainer(namespaceSymbol)) {
                 return;
             }
 
             // Set up the members collection if it doesn't exist already
             const symbolTable = isPrototypeProperty ?
-                (symbol.members || (symbol.members = createSymbolTable())) :
-                (symbol.exports || (symbol.exports = createSymbolTable()));
+                (namespaceSymbol.members || (namespaceSymbol.members = createSymbolTable())) :
+                (namespaceSymbol.exports || (namespaceSymbol.exports = createSymbolTable()));
 
             // Declare the method/property
             const jsContainerFlag = isToplevelNamespaceableInitializer ? SymbolFlags.JSContainer : 0;
-            const isMethod = isFunctionLikeDeclaration(getAssignedJavascriptInitializer(propertyAccess)!); // TODO: GH#18217
+            const isMethod = isFunctionLikeDeclaration(getAssignedJavascriptInitializer(propertyAccess)!);
             const symbolFlags = (isMethod ? SymbolFlags.Method : SymbolFlags.Property) | jsContainerFlag;
             const symbolExcludes = (isMethod ? SymbolFlags.MethodExcludes : SymbolFlags.PropertyExcludes) & ~jsContainerFlag;
-            declareSymbol(symbolTable, symbol, propertyAccess, symbolFlags, symbolExcludes);
+            declareSymbol(symbolTable, namespaceSymbol, propertyAccess, symbolFlags, symbolExcludes);
+        }
+
+        /**
+         * Javascript containers are:
+         * - Functions
+         * - classes
+         * - namespaces
+         * - variables initialized with function expressions
+         * -                       with class expressions
+         * -                       with empty object literals
+         * -                       with non-empty object literals if assigned to the prototype property
+         */
+        function isJavascriptContainer(symbol: Symbol): boolean {
+            if (symbol.flags & (SymbolFlags.Function | SymbolFlags.Class | SymbolFlags.NamespaceModule)) {
+                return true;
+            }
+            const node = symbol.valueDeclaration;
+            const init = !node ? undefined :
+                isVariableDeclaration(node) ? node.initializer :
+                isBinaryExpression(node) ? node.right :
+                isPropertyAccessExpression(node) && isBinaryExpression(node.parent) ? node.parent.right :
+                undefined;
+            if (init) {
+                const isPrototypeAssignment = isPrototypeAccess(isVariableDeclaration(node) ? node.name : isBinaryExpression(node) ? node.left : node);
+                return !!getJavascriptInitializer(isBinaryExpression(init) && init.operatorToken.kind === SyntaxKind.BarBarToken ? init.right : init, isPrototypeAssignment);
+            }
+            return false;
         }
 
         function getParentOfBinaryExpression(expr: BinaryExpression) {
@@ -2517,22 +2538,22 @@ namespace ts {
                 return lookupSymbolForNameWorker(lookupContainer, node.escapedText);
             }
             else {
-                const symbol = getJSInitializerSymbol(lookupSymbolForPropertyAccess(node.expression));
+                const symbol = lookupSymbolForPropertyAccess(node.expression);
                 return symbol && symbol.exports && symbol.exports.get(node.name.escapedText);
             }
         }
 
-        function forEachIdentifierInEntityName(e: EntityNameExpression, action: (e: Identifier, symbol: Symbol | undefined) => Symbol | undefined): Symbol | undefined {
+        function forEachIdentifierInEntityName(e: EntityNameExpression, parent: Symbol | undefined, action: (e: Identifier, symbol: Symbol | undefined, parent: Symbol | undefined) => Symbol | undefined): Symbol | undefined {
             if (isExportsOrModuleExportsOrAlias(file, e)) {
                 return file.symbol;
             }
             else if (isIdentifier(e)) {
-                return action(e, lookupSymbolForPropertyAccess(e));
+                return action(e, lookupSymbolForPropertyAccess(e), parent);
             }
             else {
-                const s = getJSInitializerSymbol(forEachIdentifierInEntityName(e.expression, action));
+                const s = forEachIdentifierInEntityName(e.expression, parent, action);
                 if (!s || !s.exports) return Debug.fail();
-                return action(e.name, s.exports.get(e.name.escapedText));
+                return action(e.name, s.exports.get(e.name.escapedText), s);
             }
         }
 
@@ -2596,7 +2617,7 @@ namespace ts {
                     bindBlockScopedVariableDeclaration(node);
                 }
                 else if (isParameterDeclaration(node)) {
-                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
+                    // It is safe to walk up parent chain to find whether the node is a destructuring parameter declaration
                     // because its parent chain has already been set up, since parents are set before descending into children.
                     //
                     // If node is a binding element in parameter declaration, we need to use ParameterExcludes.

src/compiler/builder.ts

@@ -549,8 +549,8 @@ namespace ts {
      * Create the builder to manage semantic diagnostics and cache them
      */
     export function createSemanticDiagnosticsBuilderProgram(newProgram: Program, host: BuilderProgramHost, oldProgram?: SemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): SemanticDiagnosticsBuilderProgram;
-    export function createSemanticDiagnosticsBuilderProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: SemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): SemanticDiagnosticsBuilderProgram;
-    export function createSemanticDiagnosticsBuilderProgram(newProgramOrRootNames: Program | ReadonlyArray<string>, hostOrOptions: BuilderProgramHost | CompilerOptions, oldProgramOrHost?: CompilerHost | SemanticDiagnosticsBuilderProgram, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | SemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>) {
+    export function createSemanticDiagnosticsBuilderProgram(rootNames: ReadonlyArray<string> | undefined, options: CompilerOptions | undefined, host?: CompilerHost, oldProgram?: SemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): SemanticDiagnosticsBuilderProgram;
+    export function createSemanticDiagnosticsBuilderProgram(newProgramOrRootNames: Program | ReadonlyArray<string> | undefined, hostOrOptions: BuilderProgramHost | CompilerOptions | undefined, oldProgramOrHost?: CompilerHost | SemanticDiagnosticsBuilderProgram, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | SemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>) {
         return createBuilderProgram(BuilderProgramKind.SemanticDiagnosticsBuilderProgram, getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics));
     }
 
@@ -559,8 +559,8 @@ namespace ts {
      * to emit the those files and manage semantic diagnostics cache as well
      */
     export function createEmitAndSemanticDiagnosticsBuilderProgram(newProgram: Program, host: BuilderProgramHost, oldProgram?: EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): EmitAndSemanticDiagnosticsBuilderProgram;
-    export function createEmitAndSemanticDiagnosticsBuilderProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): EmitAndSemanticDiagnosticsBuilderProgram;
-    export function createEmitAndSemanticDiagnosticsBuilderProgram(newProgramOrRootNames: Program | ReadonlyArray<string>, hostOrOptions: BuilderProgramHost | CompilerOptions, oldProgramOrHost?: CompilerHost | EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>) {
+    export function createEmitAndSemanticDiagnosticsBuilderProgram(rootNames: ReadonlyArray<string> | undefined, options: CompilerOptions | undefined, host?: CompilerHost, oldProgram?: EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): EmitAndSemanticDiagnosticsBuilderProgram;
+    export function createEmitAndSemanticDiagnosticsBuilderProgram(newProgramOrRootNames: Program | ReadonlyArray<string> | undefined, hostOrOptions: BuilderProgramHost | CompilerOptions | undefined, oldProgramOrHost?: CompilerHost | EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | EmitAndSemanticDiagnosticsBuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>) {
         return createBuilderProgram(BuilderProgramKind.EmitAndSemanticDiagnosticsBuilderProgram, getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics));
     }
 
@@ -568,8 +568,8 @@ namespace ts {
      * Creates a builder thats just abstraction over program and can be used with watch
      */
     export function createAbstractBuilder(newProgram: Program, host: BuilderProgramHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
-    export function createAbstractBuilder(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
-    export function createAbstractBuilder(newProgramOrRootNames: Program | ReadonlyArray<string>, hostOrOptions: BuilderProgramHost | CompilerOptions, oldProgramOrHost?: CompilerHost | BuilderProgram, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram {
+    export function createAbstractBuilder(rootNames: ReadonlyArray<string> | undefined, options: CompilerOptions | undefined, host?: CompilerHost, oldProgram?: BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram;
+    export function createAbstractBuilder(newProgramOrRootNames: Program | ReadonlyArray<string> | undefined, hostOrOptions: BuilderProgramHost | CompilerOptions | undefined, oldProgramOrHost?: CompilerHost | BuilderProgram, configFileParsingDiagnosticsOrOldProgram?: ReadonlyArray<Diagnostic> | BuilderProgram, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): BuilderProgram {
         const { newProgram: program } = getBuilderCreationParameters(newProgramOrRootNames, hostOrOptions, oldProgramOrHost, configFileParsingDiagnosticsOrOldProgram, configFileParsingDiagnostics);
         return {
             // Only return program, all other methods are not implemented

src/compiler/checker.ts

@@ -310,21 +310,34 @@ namespace ts {
                 const node = getParseTreeNode(nodeIn, isTypeNode);
                 return node && getTypeArgumentConstraint(node);
             },
+            getSuggestionDiagnostics: (file, ct) => {
+                let diagnostics: DiagnosticWithLocation[] | undefined;
+                try {
+                    // Record the cancellation token so it can be checked later on during checkSourceElement.
+                    // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                    // this call is done.
+                    cancellationToken = ct;
 
-            getSuggestionDiagnostics: file => {
-                return (suggestionDiagnostics.get(file.fileName) || emptyArray).concat(getUnusedDiagnostics());
-                function getUnusedDiagnostics(): ReadonlyArray<DiagnosticWithLocation> {
-                    if (file.isDeclarationFile) return emptyArray;
-
+                    // Ensure file is type checked
                     checkSourceFile(file);
-                    const diagnostics: DiagnosticWithLocation[] = [];
                     Debug.assert(!!(getNodeLinks(file).flags & NodeCheckFlags.TypeChecked));
+
+                    diagnostics = addRange(diagnostics, suggestionDiagnostics.get(file.fileName));
+                    if (!file.isDeclarationFile && (!unusedIsError(UnusedKind.Local) || !unusedIsError(UnusedKind.Parameter))) {
+                        addUnusedDiagnostics();
+                    }
+                    return diagnostics || emptyArray;
+                }
+                finally {
+                    cancellationToken = undefined;
+                }
+
+                function addUnusedDiagnostics() {
                     checkUnusedIdentifiers(getPotentiallyUnusedIdentifiers(file), (kind, diag) => {
                         if (!unusedIsError(kind)) {
-                            diagnostics.push({ ...diag, category: DiagnosticCategory.Suggestion });
+                            (diagnostics || (diagnostics = [])).push({ ...diag, category: DiagnosticCategory.Suggestion });
                         }
                     });
-                    return diagnostics;
                 }
             },
 
@@ -889,11 +902,17 @@ namespace ts {
             return result;
         }
 
-        function mergeSymbol(target: Symbol, source: Symbol) {
+        /**
+         * Note: if target is transient, then it is mutable, and mergeSymbol with both mutate and return it.
+         * If target is not transient, mergeSymbol will produce a transient clone, mutate that and return it.
+         */
+        function mergeSymbol(target: Symbol, source: Symbol): Symbol {
             if (!(target.flags & getExcludedSymbolFlags(source.flags)) ||
                 (source.flags | target.flags) & SymbolFlags.JSContainer) {
-                const targetValueDeclaration = target.valueDeclaration;
-                Debug.assert(!!(target.flags & SymbolFlags.Transient));
+                Debug.assert(source !== target);
+                if (!(target.flags & SymbolFlags.Transient)) {
+                    target = cloneSymbol(target);
+                }
                 // Javascript static-property-assignment declarations always merge, even though they are also values
                 if (source.flags & SymbolFlags.ValueModule && target.flags & SymbolFlags.ValueModule && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
                     // reset flag when merging instantiated module into value module that has only const enums
@@ -915,18 +934,6 @@ namespace ts {
                     if (!target.exports) target.exports = createSymbolTable();
                     mergeSymbolTable(target.exports, source.exports);
                 }
-                if ((source.flags | target.flags) & SymbolFlags.JSContainer) {
-                    const sourceInitializer = getJSInitializerSymbol(source)!;
-                    const init = getDeclaredJavascriptInitializer(targetValueDeclaration) || getAssignedJavascriptInitializer(targetValueDeclaration);
-                    let targetInitializer = init && init.symbol ? init.symbol : target;
-                    if (!(targetInitializer.flags & SymbolFlags.Transient)) {
-                        const mergedInitializer = getMergedSymbol(targetInitializer);
-                        targetInitializer = mergedInitializer === targetInitializer ? cloneSymbol(targetInitializer) : mergedInitializer;
-                    }
-                    if (sourceInitializer !== source || targetInitializer !== target) {
-                        mergeSymbol(targetInitializer, sourceInitializer);
-                    }
-                }
                 recordMergedSymbol(target, source);
             }
             else if (target.flags & SymbolFlags.NamespaceModule) {
@@ -947,11 +954,12 @@ namespace ts {
                     error(errorNode, message, symbolToString(source));
                 });
             }
+            return target;
         }
 
         function combineSymbolTables(first: SymbolTable | undefined, second: SymbolTable | undefined): SymbolTable | undefined {
-            if (!first || first.size === 0) return second;
-            if (!second || second.size === 0) return first;
+            if (!hasEntries(first)) return second;
+            if (!hasEntries(second)) return first;
             const combined = createSymbolTable();
             mergeSymbolTable(combined, first);
             mergeSymbolTable(combined, second);
@@ -960,17 +968,7 @@ namespace ts {
 
         function mergeSymbolTable(target: SymbolTable, source: SymbolTable) {
             source.forEach((sourceSymbol, id) => {
-                let targetSymbol = target.get(id);
-                if (!targetSymbol) {
-                    target.set(id, sourceSymbol);
-                }
-                else {
-                    if (!(targetSymbol.flags & SymbolFlags.Transient)) {
-                        targetSymbol = cloneSymbol(targetSymbol);
-                        target.set(id, targetSymbol);
-                    }
-                    mergeSymbol(targetSymbol, sourceSymbol);
-                }
+                target.set(id, target.has(id) ? mergeSymbol(target.get(id)!, sourceSymbol) : sourceSymbol);
             });
         }
 
@@ -1000,10 +998,7 @@ namespace ts {
                 // obtain item referenced by 'export='
                 mainModule = resolveExternalModuleSymbol(mainModule);
                 if (mainModule.flags & SymbolFlags.Namespace) {
-                    // if module symbol has already been merged - it is safe to use it.
-                    // otherwise clone it
-                    mainModule = mainModule.flags & SymbolFlags.Transient ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+                    mainModule = mergeSymbol(mainModule, moduleAugmentation.symbol);
                 }
                 else {
                     // moduleName will be a StringLiteral since this is not `declare global`.
@@ -1463,9 +1458,8 @@ namespace ts {
                     case SyntaxKind.JSDocTypedefTag:
                     case SyntaxKind.JSDocCallbackTag:
                         // js type aliases do not resolve names from their host, so skip past it
-                        lastLocation = location;
-                        location = getJSDocHost(location).parent;
-                        continue;
+                        location = getJSDocHost(location);
+                        break;
                 }
                 if (isSelfReferenceLocation(location)) {
                     lastSelfReferenceLocation = location;
@@ -1789,7 +1783,7 @@ namespace ts {
         }
 
         function isSyntacticDefault(node: Node) {
-            return ((isExportAssignment(node) && !node.isExportEquals) || hasModifier(node, ModifierFlags.Default));
+            return ((isExportAssignment(node) && !node.isExportEquals) || hasModifier(node, ModifierFlags.Default) || isExportSpecifier(node));
         }
 
         function canHaveSyntheticDefault(file: SourceFile | undefined, moduleSymbol: Symbol, dontResolveAlias: boolean) {
@@ -2124,14 +2118,6 @@ namespace ts {
                     return namespace;
                 }
                 if (isInJavaScriptFile(name)) {
-                    const initializer = getDeclaredJavascriptInitializer(namespace.valueDeclaration) || getAssignedJavascriptInitializer(namespace.valueDeclaration);
-                    if (initializer) {
-                        namespace = getSymbolOfNode(initializer)!;
-                    }
-                    // Currently, IIFEs may not have a symbol and we don't know about their contents. Give up in this case.
-                    if (!namespace) {
-                        return undefined;
-                    }
                     if (namespace.valueDeclaration &&
                         isVariableDeclaration(namespace.valueDeclaration) &&
                         namespace.valueDeclaration.initializer &&
@@ -2324,14 +2310,7 @@ namespace ts {
             }
             moduleSymbol.exports!.forEach((s, name) => {
                 if (name === InternalSymbolName.ExportEquals) return;
-                if (!merged.exports!.has(name)) {
-                    merged.exports!.set(name, s);
-                }
-                else {
-                    const ms = cloneSymbol(merged.exports!.get(name)!);
-                    mergeSymbol(ms, s);
-                    merged.exports!.set(name, ms);
-                }
+                merged.exports!.set(name, merged.exports!.has(name) ? mergeSymbol(merged.exports!.get(name)!, s) : s);
             });
             return merged;
         }
@@ -2533,6 +2512,46 @@ namespace ts {
             return getMergedSymbol(symbol.parent && getLateBoundSymbol(symbol.parent));
         }
 
+        /**
+         * Attempts to find the symbol corresponding to the container a symbol is in - usually this
+         * is just its' `.parent`, but for locals, this value is `undefined`
+         */
+        function getContainerOfSymbol(symbol: Symbol): Symbol | undefined {
+            const container = getParentOfSymbol(symbol);
+            if (container) {
+                return container;
+            }
+            const candidate = forEach(symbol.declarations, d => !isAmbientModule(d) && d.parent && hasNonGlobalAugmentationExternalModuleSymbol(d.parent) ? getSymbolOfNode(d.parent) : undefined);
+            if (!candidate) {
+                return undefined;
+            }
+            const alias = getAliasForSymbolInContainer(candidate, symbol);
+            return alias ? candidate : undefined;
+        }
+
+        function getAliasForSymbolInContainer(container: Symbol, symbol: Symbol) {
+            if (container === getParentOfSymbol(symbol)) {
+                // fast path, `symbol` is either already the alias or isn't aliased
+                return symbol;
+            }
+            const exports = getExportsOfSymbol(container);
+            const quick = exports.get(symbol.escapedName);
+            if (quick && symbolRefersToTarget(quick)) {
+                return quick;
+            }
+            return forEachEntry(exports, exported => {
+                if (symbolRefersToTarget(exported)) {
+                    return exported;
+                }
+            });
+
+            function symbolRefersToTarget(s: Symbol) {
+                if (s === symbol || resolveSymbol(s) === symbol || resolveSymbol(s) === resolveSymbol(symbol)) {
+                    return s;
+                }
+            }
+        }
+
         function getExportSymbolOfValueSymbolIfExported(symbol: Symbol): Symbol;
         function getExportSymbolOfValueSymbolIfExported(symbol: Symbol | undefined): Symbol | undefined;
         function getExportSymbolOfValueSymbolIfExported(symbol: Symbol | undefined): Symbol | undefined {
@@ -2838,7 +2857,7 @@ namespace ts {
                     // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
                     // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
                     meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
+                    symbol = getContainerOfSymbol(symbol);
                 }
 
                 // This could be a symbol that is not exported in the external module
@@ -3729,12 +3748,12 @@ namespace ts {
                         needsQualification(accessibleSymbolChain[0], context.enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
 
                         // Go up and add our parent.
-                        const parent = getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
+                        const parent = getContainerOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol);
                         if (parent) {
                             const parentChain = getSymbolChain(parent, getQualifiedLeftMeaning(meaning), /*endOfChain*/ false);
                             if (parentChain) {
                                 parentSymbol = parent;
-                                accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [symbol]);
+                                accessibleSymbolChain = parentChain.concat(accessibleSymbolChain || [getAliasForSymbolInContainer(parent, symbol) || symbol]);
                             }
                         }
                     }
@@ -4065,7 +4084,8 @@ namespace ts {
                         // ambient module, just use declaration/symbol name (fallthrough)
                     }
                     else {
-                        return `"${getResolvedExternalModuleName(context!.tracker.moduleResolverHost!, file, getSourceFileOfNode(getOriginalNode(context!.enclosingDeclaration)))}"`;
+                        const contextFile = getSourceFileOfNode(getOriginalNode(context!.enclosingDeclaration))!;
+                        return `"${file.moduleName || moduleSpecifiers.getModuleSpecifier(compilerOptions, contextFile, contextFile.path, file.path, context!.tracker.moduleResolverHost!)}"`;
                     }
                 }
                 const declaration = symbol.declarations[0];
@@ -4926,6 +4946,8 @@ namespace ts {
                 else if (isJSDocPropertyLikeTag(declaration)
                     || isPropertyAccessExpression(declaration)
                     || isIdentifier(declaration)
+                    || isClassDeclaration(declaration)
+                    || isFunctionDeclaration(declaration)
                     || (isMethodDeclaration(declaration) && !isObjectLiteralMethod(declaration))
                     || isMethodSignature(declaration)) {
 
@@ -4955,7 +4977,7 @@ namespace ts {
                     type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
                 }
                 else {
-                    return Debug.fail("Unhandled declaration kind! " + Debug.showSyntaxKind(declaration));
+                    return Debug.fail("Unhandled declaration kind! " + Debug.showSyntaxKind(declaration) + " for " + Debug.showSymbol(symbol));
                 }
 
                 if (!popTypeResolution()) {
@@ -5057,8 +5079,25 @@ namespace ts {
         }
 
         function getTypeOfFuncClassEnumModule(symbol: Symbol): Type {
-            const links = getSymbolLinks(symbol);
+            let links = getSymbolLinks(symbol);
             if (!links.type) {
+                const jsDeclaration = getDeclarationOfJSInitializer(symbol.valueDeclaration);
+                if (jsDeclaration) {
+                    const jsSymbol = getSymbolOfNode(jsDeclaration);
+                    if (jsSymbol && (hasEntries(jsSymbol.exports) || hasEntries(jsSymbol.members))) {
+                        symbol = cloneSymbol(symbol);
+                        // note:we overwrite links because we just cloned the symbol
+                        links = symbol as TransientSymbol;
+                        if (hasEntries(jsSymbol.exports)) {
+                            symbol.exports = symbol.exports || createSymbolTable();
+                            mergeSymbolTable(symbol.exports, jsSymbol.exports);
+                        }
+                        if (hasEntries(jsSymbol.members)) {
+                            symbol.members = symbol.members || createSymbolTable();
+                            mergeSymbolTable(symbol.members, jsSymbol.members);
+                        }
+                    }
+                }
                 if (symbol.flags & SymbolFlags.Module && isShorthandAmbientModuleSymbol(symbol)) {
                     links.type = anyType;
                 }
@@ -7406,18 +7445,17 @@ namespace ts {
             const result: Signature[] = [];
             for (let i = 0; i < symbol.declarations.length; i++) {
                 const decl = symbol.declarations[i];
-                const node = isPropertyAccessExpression(decl) ? getAssignedJavascriptInitializer(decl)! : decl; // TODO: GH#18217
-                if (!isFunctionLike(node)) continue;
+                if (!isFunctionLike(decl)) continue;
                 // Don't include signature if node is the implementation of an overloaded function. A node is considered
                 // an implementation node if it has a body and the previous node is of the same kind and immediately
                 // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
-                if (i > 0 && (node as FunctionLikeDeclaration).body) {
+                if (i > 0 && (decl as FunctionLikeDeclaration).body) {
                     const previous = symbol.declarations[i - 1];
-                    if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                    if (decl.parent === previous.parent && decl.kind === previous.kind && decl.pos === previous.end) {
                         continue;
                     }
                 }
-                result.push(getSignatureFromDeclaration(node));
+                result.push(getSignatureFromDeclaration(decl));
             }
             return result;
         }
@@ -8844,7 +8882,9 @@ namespace ts {
                 return type.simplified === circularConstraintType ? type : type.simplified;
             }
             type.simplified = circularConstraintType;
-            const objectType = type.objectType;
+            // We recursively simplify the object type as it may in turn be an indexed access type. For example, with
+            // '{ [P in T]: { [Q in U]: number } }[T][U]' we want to first simplify the inner indexed access type.
+            const objectType = getSimplifiedType(type.objectType);
             if (objectType.flags & TypeFlags.Intersection && isGenericObjectType(objectType)) {
                 // Given an indexed access type T[K], if T is an intersection containing one or more generic types and one or
                 // more object types with only a string index signature, e.g. '(U & V & { [x: string]: D })[K]', return a
@@ -9165,12 +9205,13 @@ namespace ts {
         }
 
         function resolveImportSymbolType(node: ImportTypeNode, links: NodeLinks, symbol: Symbol, meaning: SymbolFlags) {
-            links.resolvedSymbol = symbol;
+            const resolvedSymbol = resolveSymbol(symbol);
+            links.resolvedSymbol = resolvedSymbol;
             if (meaning === SymbolFlags.Value) {
-                return links.resolvedType = getTypeOfSymbol(symbol);
+                return links.resolvedType = getTypeOfSymbol(symbol); // intentionally doesn't use resolved symbol so type is cached as expected on the alias
             }
             else {
-                return links.resolvedType = getTypeReferenceType(node, symbol);
+                return links.resolvedType = getTypeReferenceType(node, resolvedSymbol); // getTypeReferenceType doesn't handle aliases - it must get the resolved symbol
             }
         }
 
@@ -14075,11 +14116,14 @@ namespace ts {
                 if (operator === SyntaxKind.ExclamationEqualsToken || operator === SyntaxKind.ExclamationEqualsEqualsToken) {
                     assumeTrue = !assumeTrue;
                 }
+                if (type.flags & TypeFlags.Any && literal.text === "function") {
+                    return type;
+                }
                 if (assumeTrue && !(type.flags & TypeFlags.Union)) {
                     // We narrow a non-union type to an exact primitive type if the non-union type
                     // is a supertype of that primitive type. For example, type 'any' can be narrowed
                     // to one of the primitive types.
-                    const targetType = typeofTypesByName.get(literal.text);
+                    const targetType = literal.text === "function" ? globalFunctionType : typeofTypesByName.get(literal.text);
                     if (targetType) {
                         if (isTypeSubtypeOf(targetType, type)) {
                             return targetType;
@@ -15259,7 +15303,7 @@ namespace ts {
                     // expression has no contextual type, the right operand is contextually typed by the type of the left operand,
                     // except for the special case of Javascript declarations of the form `namespace.prop = namespace.prop || {}`
                     const type = getContextualType(binaryExpression);
-                    return !type && node === right && !getDeclaredJavascriptInitializer(binaryExpression.parent) && !getAssignedJavascriptInitializer(binaryExpression) ?
+                    return !type && node === right && !isDefaultedJavascriptInitializer(binaryExpression) ?
                         getTypeOfExpression(left) : type;
                 case SyntaxKind.AmpersandAmpersandToken:
                 case SyntaxKind.CommaToken:
@@ -15268,6 +15312,7 @@ namespace ts {
                     return undefined;
             }
         }
+
         // In an assignment expression, the right operand is contextually typed by the type of the left operand.
         // Don't do this for special property assignments to avoid circularity.
         function isContextSensitiveAssignment(binaryExpression: BinaryExpression): boolean {
@@ -15935,13 +15980,16 @@ namespace ts {
             let hasComputedStringProperty = false;
             let hasComputedNumberProperty = false;
 
-            if (isInJSFile && node.properties.length === 0) {
-                // an empty JS object literal that nonetheless has members is a JS namespace
-                const symbol = getSymbolOfNode(node);
-                if (symbol.exports) {
-                    propertiesTable = symbol.exports;
-                    symbol.exports.forEach(symbol => propertiesArray.push(getMergedSymbol(symbol)));
-                    return createObjectLiteralType();
+            if (isInJSFile) {
+                const decl = getDeclarationOfJSInitializer(node);
+                if (decl) {
+                    // a JS object literal whose declaration's symbol has exports is a JS namespace
+                    const symbol = getMergedSymbol(decl.symbol);
+                    if (symbol && hasEntries(symbol.exports)) {
+                        propertiesTable = symbol.exports;
+                        symbol.exports.forEach(symbol => propertiesArray.push(getMergedSymbol(symbol)));
+                        return createObjectLiteralType();
+                    }
                 }
             }
             propertiesTable = createSymbolTable();
@@ -17335,88 +17383,11 @@ namespace ts {
          *         and 1 insertion/deletion at 3 characters)
          */
         function getSpellingSuggestionForName(name: string, symbols: Symbol[], meaning: SymbolFlags): Symbol | undefined {
-            const maximumLengthDifference = Math.min(2, Math.floor(name.length * 0.34));
-            let bestDistance = Math.floor(name.length * 0.4) + 1; // If the best result isn't better than this, don't bother.
-            let bestCandidate: Symbol | undefined;
-            let justCheckExactMatches = false;
-            const nameLowerCase = name.toLowerCase();
-            for (const candidate of symbols) {
+            return getSpellingSuggestion(name, symbols, getCandidateName);
+            function getCandidateName(candidate: Symbol) {
                 const candidateName = symbolName(candidate);
-                if (candidateName.charCodeAt(0) === CharacterCodes.doubleQuote
-                    || !(candidate.flags & meaning && Math.abs(candidateName.length - nameLowerCase.length) <= maximumLengthDifference)) {
-                    continue;
-                }
-                const candidateNameLowerCase = candidateName.toLowerCase();
-                if (candidateNameLowerCase === nameLowerCase) {
-                    return candidate;
-                }
-                if (justCheckExactMatches) {
-                    continue;
-                }
-                if (candidateName.length < 3) {
-                    // Don't bother, user would have noticed a 2-character name having an extra character
-                    continue;
-                }
-                // Only care about a result better than the best so far.
-                const distance = levenshteinWithMax(nameLowerCase, candidateNameLowerCase, bestDistance - 1);
-                if (distance === undefined) {
-                    continue;
-                }
-                if (distance < 3) {
-                    justCheckExactMatches = true;
-                    bestCandidate = candidate;
-                }
-                else {
-                    Debug.assert(distance < bestDistance); // Else `levenshteinWithMax` should return undefined
-                    bestDistance = distance;
-                    bestCandidate = candidate;
-                }
+                return !startsWith(candidateName, "\"") && candidate.flags & meaning ? candidateName : undefined;
             }
-            return bestCandidate;
-        }
-
-        function levenshteinWithMax(s1: string, s2: string, max: number): number | undefined {
-            let previous = new Array(s2.length + 1);
-            let current = new Array(s2.length + 1);
-            /** Represents any value > max. We don't care about the particular value. */
-            const big = max + 1;
-
-            for (let i = 0; i <= s2.length; i++) {
-                previous[i] = i;
-            }
-
-            for (let i = 1; i <= s1.length; i++) {
-                const c1 = s1.charCodeAt(i - 1);
-                const minJ = i > max ? i - max : 1;
-                const maxJ = s2.length > max + i ? max + i : s2.length;
-                current[0] = i;
-                /** Smallest value of the matrix in the ith column. */
-                let colMin = i;
-                for (let j = 1; j < minJ; j++) {
-                    current[j] = big;
-                }
-                for (let j = minJ; j <= maxJ; j++) {
-                    const dist = c1 === s2.charCodeAt(j - 1)
-                        ? previous[j - 1]
-                        : Math.min(/*delete*/ previous[j] + 1, /*insert*/ current[j - 1] + 1, /*substitute*/ previous[j - 1] + 2);
-                    current[j] = dist;
-                    colMin = Math.min(colMin, dist);
-                }
-                for (let j = maxJ + 1; j <= s2.length; j++) {
-                    current[j] = big;
-                }
-                if (colMin > max) {
-                    // Give up -- everything in this column is > max and it can't get better in future columns.
-                    return undefined;
-                }
-
-                const temp = previous;
-                previous = current;
-                current = temp;
-            }
-
-            const res = previous[s2.length];
-            return res > max ? undefined : res;
         }
 
         function markPropertyAsReferenced(prop: Symbol, nodeForCheckWriteOnly: Node | undefined, isThisAccess: boolean) {
@@ -18636,6 +18607,7 @@ namespace ts {
             if (node.expression.kind === SyntaxKind.SuperKeyword) {
                 const superType = checkSuperExpression(node.expression);
                 if (isTypeAny(superType)) {
+                    forEach(node.arguments, checkExpression); // Still visit arguments so they get marked for visibility, etc
                     return anySignature;
                 }
                 if (superType !== errorType) {
@@ -19043,10 +19015,6 @@ namespace ts {
         }
 
         function getJavaScriptClassType(symbol: Symbol): Type | undefined {
-            const initializer = getDeclaredJavascriptInitializer(symbol.valueDeclaration);
-            if (initializer) {
-                symbol = getSymbolOfNode(initializer)!;
-            }
             let inferred: Type | undefined;
             if (isJavaScriptConstructor(symbol.valueDeclaration)) {
                 inferred = getInferredClassType(symbol);
@@ -19157,7 +19125,17 @@ namespace ts {
             if (returnType.flags & TypeFlags.ESSymbolLike && isSymbolOrSymbolForCall(node)) {
                 return getESSymbolLikeTypeForNode(walkUpParenthesizedExpressions(node.parent));
             }
-            return returnType;
+            let jsAssignmentType: Type | undefined;
+            if (isInJavaScriptFile(node)) {
+                const decl = getDeclarationOfJSInitializer(node);
+                if (decl) {
+                    const jsSymbol = getSymbolOfNode(decl);
+                    if (jsSymbol && hasEntries(jsSymbol.exports)) {
+                        jsAssignmentType = createAnonymousType(jsSymbol, jsSymbol.exports, emptyArray, emptyArray, jsObjectLiteralIndexInfo, undefined);
+                    }
+                }
+            }
+            return jsAssignmentType ? getIntersectionType([returnType, jsAssignmentType]) : returnType;
         }
 
         function isSymbolOrSymbolForCall(node: Node) {
@@ -20653,13 +20631,12 @@ namespace ts {
         }
 
         function checkDeclarationInitializer(declaration: HasExpressionInitializer) {
-            const inJs = isInJavaScriptFile(declaration);
-            const initializer = inJs && getDeclaredJavascriptInitializer(declaration) || declaration.initializer!;
+            const initializer = getEffectiveInitializer(declaration)!;
             const type = getTypeOfExpression(initializer, /*cache*/ true);
             const widened = getCombinedNodeFlags(declaration) & NodeFlags.Const ||
                 (getCombinedModifierFlags(declaration) & ModifierFlags.Readonly && !isParameterPropertyDeclaration(declaration)) ||
                 isTypeAssertion(initializer) ? type : getWidenedLiteralType(type);
-            if (inJs) {
+            if (isInJavaScriptFile(declaration)) {
                 if (widened.flags & TypeFlags.Nullable) {
                     if (noImplicitAny) {
                         reportImplicitAnyError(declaration, anyType);
@@ -22737,7 +22714,7 @@ namespace ts {
         function errorUnusedLocal(declaration: Declaration, name: string, addDiagnostic: AddUnusedDiagnostic) {
             const node = getNameOfDeclaration(declaration) || declaration;
             const message = isTypeDeclaration(declaration) ? Diagnostics._0_is_declared_but_never_used : Diagnostics._0_is_declared_but_its_value_is_never_read;
-            addDiagnostic(UnusedKind.Local, createDiagnosticForNodeSpan(getSourceFileOfNode(declaration), declaration, node, message, name));
+            addDiagnostic(UnusedKind.Local, createDiagnosticForNode(node, message, name));
         }
 
         function parameterNameStartsWithUnderscore(parameterName: DeclarationName) {
@@ -23285,8 +23262,8 @@ namespace ts {
             if (node === symbol.valueDeclaration) {
                 // Node is the primary declaration of the symbol, just validate the initializer
                 // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== SyntaxKind.ForInStatement) {
-                    const initializer = isInJavaScriptFile(node) && getDeclaredJavascriptInitializer(node) || node.initializer;
+                const initializer = getEffectiveInitializer(node);
+                if (initializer && node.parent.parent.kind !== SyntaxKind.ForInStatement) {
                     checkTypeAssignableTo(checkExpressionCached(initializer), type, node, /*headMessage*/ undefined);
                     checkParameterInitializer(node);
                 }
@@ -28369,9 +28346,9 @@ namespace ts {
         }
 
         function checkGrammarConstructorTypeParameters(node: ConstructorDeclaration) {
-            const typeParameters = getEffectiveTypeParameterDeclarations(node);
-            if (isNodeArray(typeParameters)) {
-                const { pos, end } = typeParameters;
+            const jsdocTypeParameters = isInJavaScriptFile(node) && getJSDocTypeParameterDeclarations(node);
+            if (node.typeParameters || jsdocTypeParameters && jsdocTypeParameters.length) {
+                const { pos, end } = node.typeParameters || jsdocTypeParameters && jsdocTypeParameters[0] || node;
                 return grammarErrorAtPos(node, pos, end - pos, Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
             }
         }

src/compiler/commandLineParser.ts

@@ -1,6 +1,66 @@
 namespace ts {
     /* @internal */
     export const compileOnSaveCommandLineOption: CommandLineOption = { name: "compileOnSave", type: "boolean" };
+
+    // NOTE: The order here is important to default lib ordering as entries will have the same
+    //       order in the generated program (see `getDefaultLibPriority` in program.ts). This
+    //       order also affects overload resolution when a type declared in one lib is
+    //       augmented in another lib.
+    const libEntries: [string, string][] = [
+        // JavaScript only
+        ["es5", "lib.es5.d.ts"],
+        ["es6", "lib.es2015.d.ts"],
+        ["es2015", "lib.es2015.d.ts"],
+        ["es7", "lib.es2016.d.ts"],
+        ["es2016", "lib.es2016.d.ts"],
+        ["es2017", "lib.es2017.d.ts"],
+        ["es2018", "lib.es2018.d.ts"],
+        ["esnext", "lib.esnext.d.ts"],
+        // Host only
+        ["dom", "lib.dom.d.ts"],
+        ["dom.iterable", "lib.dom.iterable.d.ts"],
+        ["webworker", "lib.webworker.d.ts"],
+        ["webworker.importscripts", "lib.webworker.importscripts.d.ts"],
+        ["scripthost", "lib.scripthost.d.ts"],
+        // ES2015 Or ESNext By-feature options
+        ["es2015.core", "lib.es2015.core.d.ts"],
+        ["es2015.collection", "lib.es2015.collection.d.ts"],
+        ["es2015.generator", "lib.es2015.generator.d.ts"],
+        ["es2015.iterable", "lib.es2015.iterable.d.ts"],
+        ["es2015.promise", "lib.es2015.promise.d.ts"],
+        ["es2015.proxy", "lib.es2015.proxy.d.ts"],
+        ["es2015.reflect", "lib.es2015.reflect.d.ts"],
+        ["es2015.symbol", "lib.es2015.symbol.d.ts"],
+        ["es2015.symbol.wellknown", "lib.es2015.symbol.wellknown.d.ts"],
+        ["es2016.array.include", "lib.es2016.array.include.d.ts"],
+        ["es2017.object", "lib.es2017.object.d.ts"],
+        ["es2017.sharedmemory", "lib.es2017.sharedmemory.d.ts"],
+        ["es2017.string", "lib.es2017.string.d.ts"],
+        ["es2017.intl", "lib.es2017.intl.d.ts"],
+        ["es2017.typedarrays", "lib.es2017.typedarrays.d.ts"],
+        ["es2018.intl", "lib.es2018.intl.d.ts"],
+        ["es2018.promise", "lib.es2018.promise.d.ts"],
+        ["es2018.regexp", "lib.es2018.regexp.d.ts"],
+        ["esnext.array", "lib.esnext.array.d.ts"],
+        ["esnext.symbol", "lib.esnext.symbol.d.ts"],
+        ["esnext.asynciterable", "lib.esnext.asynciterable.d.ts"],
+    ];
+
+    /**
+     * An array of supported "lib" reference file names used to determine the order for inclusion
+     * when referenced, as well as for spelling suggestions. This ensures the correct ordering for
+     * overload resolution when a type declared in one lib is extended by another.
+     */
+    /* @internal */
+    export const libs = libEntries.map(entry => entry[0]);
+
+    /**
+     * A map of lib names to lib files. This map is used both for parsing the "lib" command line
+     * option as well as for resolving lib reference directives.
+     */
+    /* @internal */
+    export const libMap = createMapFromEntries(libEntries);
+
     /* @internal */
     export const optionDeclarations: CommandLineOption[] = [
         // CommandLine only options
@@ -122,43 +182,7 @@ namespace ts {
             type: "list",
             element: {
                 name: "lib",
-                type: createMapFromTemplate({
-                    // JavaScript only
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    "es2018": "lib.es2018.d.ts",
-                    "esnext": "lib.esnext.d.ts",
-                    // Host only
-                    "dom": "lib.dom.d.ts",
-                    "dom.iterable": "lib.dom.iterable.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    // ES2015 Or ESNext By-feature options
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts",
-                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts",
-                    "es2017.string": "lib.es2017.string.d.ts",
-                    "es2017.intl": "lib.es2017.intl.d.ts",
-                    "es2017.typedarrays": "lib.es2017.typedarrays.d.ts",
-                    "es2018.intl": "lib.es2018.intl.d.ts",
-                    "es2018.promise": "lib.es2018.promise.d.ts",
-                    "es2018.regexp": "lib.es2018.regexp.d.ts",
-                    "esnext.array": "lib.esnext.array.d.ts",
-                    "esnext.asynciterable": "lib.esnext.asynciterable.d.ts",
-                }),
+                type: libMap
             },
             showInSimplifiedHelpView: true,
             category: Diagnostics.Basic_Options,
@@ -937,7 +961,8 @@ namespace ts {
         }
     }
 
-    function getOptionFromName(optionName: string, allowShort = false): CommandLineOption | undefined {
+    /** @internal */
+    export function getOptionFromName(optionName: string, allowShort = false): CommandLineOption | undefined {
         optionName = optionName.toLowerCase();
         const { optionNameMap, shortOptionNames } = getOptionNameMap();
         // Try to translate short option names to their full equivalents.

src/compiler/core.ts

@@ -59,6 +59,14 @@ namespace ts {
         return result;
     }
 
+    export function createMapFromEntries<T>(entries: [string, T][]): Map<T> {
+        const map = createMap<T>();
+        for (const [key, value] of entries) {
+            map.set(key, value);
+        }
+        return map;
+    }
+
     export function createMapFromTemplate<T>(template: MapLike<T>): Map<T> {
         const map: Map<T> = new MapCtr<T>();
 
@@ -169,6 +177,10 @@ namespace ts {
         return array ? array.length : 0;
     }
 
+    export function hasEntries(map: ReadonlyUnderscoreEscapedMap<any> | undefined): map is ReadonlyUnderscoreEscapedMap<any> {
+        return !!map && !!map.size;
+    }
+
     /**
      * Iterates through 'array' by index and performs the callback on each element of array until the callback
      * returns a truthy value, then returns that value.
@@ -1792,7 +1804,7 @@ namespace ts {
      * Case-insensitive comparisons compare both strings one code-point at a time using the integer
      * value of each code-point after applying `toUpperCase` to each string. We always map both
      * strings to their upper-case form as some unicode characters do not properly round-trip to
-     * lowercase (such as `ẞ` (German sharp capital s)).
+     * lowercase (such as `ẞ` (German sharp capital s)).
      */
     export function compareStringsCaseInsensitive(a: string, b: string) {
         if (a === b) return Comparison.EqualTo;
@@ -1864,7 +1876,7 @@ namespace ts {
             //
             // For case insensitive comparisons we always map both strings to their
             // upper-case form as some unicode characters do not properly round-trip to
-            // lowercase (such as `ẞ` (German sharp capital s)).
+            // lowercase (such as `ẞ` (German sharp capital s)).
             return (a, b) => compareWithCallback(a, b, compareDictionaryOrder);
 
             function compareDictionaryOrder(a: string, b: string) {
@@ -1989,6 +2001,103 @@ namespace ts {
         return text1 ? Comparison.GreaterThan : Comparison.LessThan;
     }
 
+    /**
+     * Given a name and a list of names that are *not* equal to the name, return a spelling suggestion if there is one that is close enough.
+     * Names less than length 3 only check for case-insensitive equality, not Levenshtein distance.
+     *
+     * If there is a candidate that's the same except for case, return that.
+     * If there is a candidate that's within one edit of the name, return that.
+     * Otherwise, return the candidate with the smallest Levenshtein distance,
+     *    except for candidates:
+     *      * With no name
+     *      * Whose length differs from the target name by more than 0.34 of the length of the name.
+     *      * Whose levenshtein distance is more than 0.4 of the length of the name
+     *        (0.4 allows 1 substitution/transposition for every 5 characters,
+     *         and 1 insertion/deletion at 3 characters)
+     */
+    export function getSpellingSuggestion<T>(name: string, candidates: T[], getName: (candidate: T) => string | undefined): T | undefined {
+        const maximumLengthDifference = Math.min(2, Math.floor(name.length * 0.34));
+        let bestDistance = Math.floor(name.length * 0.4) + 1; // If the best result isn't better than this, don't bother.
+        let bestCandidate: T | undefined;
+        let justCheckExactMatches = false;
+        const nameLowerCase = name.toLowerCase();
+        for (const candidate of candidates) {
+            const candidateName = getName(candidate);
+            if (candidateName !== undefined && Math.abs(candidateName.length - nameLowerCase.length) <= maximumLengthDifference) {
+                const candidateNameLowerCase = candidateName.toLowerCase();
+                if (candidateNameLowerCase === nameLowerCase) {
+                    return candidate;
+                }
+                if (justCheckExactMatches) {
+                    continue;
+                }
+                if (candidateName.length < 3) {
+                    // Don't bother, user would have noticed a 2-character name having an extra character
+                    continue;
+                }
+                // Only care about a result better than the best so far.
+                const distance = levenshteinWithMax(nameLowerCase, candidateNameLowerCase, bestDistance - 1);
+                if (distance === undefined) {
+                    continue;
+                }
+                if (distance < 3) {
+                    justCheckExactMatches = true;
+                    bestCandidate = candidate;
+                }
+                else {
+                    Debug.assert(distance < bestDistance); // Else `levenshteinWithMax` should return undefined
+                    bestDistance = distance;
+                    bestCandidate = candidate;
+                }
+            }
+        }
+        return bestCandidate;
+    }
+
+    function levenshteinWithMax(s1: string, s2: string, max: number): number | undefined {
+        let previous = new Array(s2.length + 1);
+        let current = new Array(s2.length + 1);
+        /** Represents any value > max. We don't care about the particular value. */
+        const big = max + 1;
+
+        for (let i = 0; i <= s2.length; i++) {
+            previous[i] = i;
+        }
+
+        for (let i = 1; i <= s1.length; i++) {
+            const c1 = s1.charCodeAt(i - 1);
+            const minJ = i > max ? i - max : 1;
+            const maxJ = s2.length > max + i ? max + i : s2.length;
+            current[0] = i;
+            /** Smallest value of the matrix in the ith column. */
+            let colMin = i;
+            for (let j = 1; j < minJ; j++) {
+                current[j] = big;
+            }
+            for (let j = minJ; j <= maxJ; j++) {
+                const dist = c1 === s2.charCodeAt(j - 1)
+                    ? previous[j - 1]
+                    : Math.min(/*delete*/ previous[j] + 1, /*insert*/ current[j - 1] + 1, /*substitute*/ previous[j - 1] + 2);
+                current[j] = dist;
+                colMin = Math.min(colMin, dist);
+            }
+            for (let j = maxJ + 1; j <= s2.length; j++) {
+                current[j] = big;
+            }
+            if (colMin > max) {
+                // Give up -- everything in this column is > max and it can't get better in future columns.
+                return undefined;
+            }
+
+            const temp = previous;
+            previous = current;
+            current = temp;
+        }
+
+        const res = previous[s2.length];
+        return res > max ? undefined : res;
+    }
+
     export function getEmitScriptTarget(compilerOptions: CompilerOptions) {
         return compilerOptions.target || ScriptTarget.ES3;
     }
@@ -2588,6 +2697,22 @@ namespace ts {
         return startsWith(str, prefix) ? str.substr(prefix.length) : str;
     }
 
+    export function tryRemovePrefix(str: string, prefix: string): string | undefined {
+        return startsWith(str, prefix) ? str.substring(prefix.length) : undefined;
+    }
+
+    export function tryRemoveDirectoryPrefix(path: string, dirPath: string): string | undefined {
+        const a = tryRemovePrefix(path, dirPath);
+        if (a === undefined) return undefined;
+        switch (a.charCodeAt(0)) {
+            case CharacterCodes.slash:
+            case CharacterCodes.backslash:
+                return a.slice(1);
+            default:
+                return undefined;
+        }
+    }
+
     export function endsWith(str: string, suffix: string): boolean {
         const expectedPos = str.length - suffix.length;
         return expectedPos >= 0 && str.indexOf(suffix, expectedPos) === expectedPos;
@@ -2597,6 +2722,10 @@ namespace ts {
         return endsWith(str, suffix) ? str.slice(0, str.length - suffix.length) : str;
     }
 
+    export function tryRemoveSuffix(str: string, suffix: string): string | undefined {
+        return endsWith(str, suffix) ? str.slice(0, str.length - suffix.length) : undefined;
+    }
+
     export function stringContains(str: string, substring: string): boolean {
         return str.indexOf(substring) !== -1;
     }
@@ -2797,6 +2926,7 @@ namespace ts {
         basePaths: ReadonlyArray<string>;
     }
 
+    /** @param path directory of the tsconfig.json */
     export function getFileMatcherPatterns(path: string, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
@@ -2811,16 +2941,20 @@ namespace ts {
         };
     }
 
+    export function getRegexFromPattern(pattern: string, useCaseSensitiveFileNames: boolean): RegExp {
+        return new RegExp(pattern, useCaseSensitiveFileNames ? "" : "i");
+    }
+
+    /** @param path directory of the tsconfig.json */
     export function matchFiles(path: string, extensions: ReadonlyArray<string> | undefined, excludes: ReadonlyArray<string> | undefined, includes: ReadonlyArray<string> | undefined, useCaseSensitiveFileNames: boolean, currentDirectory: string, depth: number | undefined, getFileSystemEntries: (path: string) => FileSystemEntries): string[] {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
 
         const patterns = getFileMatcherPatterns(path, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
 
-        const regexFlag = useCaseSensitiveFileNames ? "" : "i";
-        const includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(pattern => new RegExp(pattern, regexFlag));
-        const includeDirectoryRegex = patterns.includeDirectoryPattern && new RegExp(patterns.includeDirectoryPattern, regexFlag);
-        const excludeRegex = patterns.excludePattern && new RegExp(patterns.excludePattern, regexFlag);
+        const includeFileRegexes = patterns.includeFilePatterns && patterns.includeFilePatterns.map(pattern => getRegexFromPattern(pattern, useCaseSensitiveFileNames));
+        const includeDirectoryRegex = patterns.includeDirectoryPattern && getRegexFromPattern(patterns.includeDirectoryPattern, useCaseSensitiveFileNames);
+        const excludeRegex = patterns.excludePattern && getRegexFromPattern(patterns.excludePattern, useCaseSensitiveFileNames);
 
         // Associate an array of results with each include regex. This keeps results in order of the "include" order.
         // If there are no "includes", then just put everything in results[0].

src/compiler/diagnosticMessages.json

@@ -219,6 +219,10 @@
         "category": "Error",
         "code": 1068
     },
+    "Unexpected token. A type parameter name was expected without curly braces.": {
+        "category": "Error",
+        "code": 1069
+    },
     "'{0}' modifier cannot appear on a type member.": {
         "category": "Error",
         "code": 1070
@@ -2365,6 +2369,14 @@
         "category": "Error",
         "code": 2725
     },
+    "Cannot find lib definition for '{0}'.": {
+        "category": "Error",
+        "code": 2726
+    },
+    "Cannot find lib definition for '{0}'. Did you mean '{1}'?": {
+        "category": "Error",
+        "code": 2727
+    },
 
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",

src/compiler/emitter.ts

@@ -50,7 +50,7 @@ namespace ts {
         }
         else {
             const jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, getOutputExtension(sourceFile, options));
-            const sourceMapFilePath = getSourceMapFilePath(jsFilePath, options);
+            const sourceMapFilePath = isJsonSourceFile(sourceFile) ? undefined : getSourceMapFilePath(jsFilePath, options);
             // For legacy reasons (ie, we have baselines capturing the behavior), js files don't report a .d.ts output path - this would only matter if `declaration` and `allowJs` were both on, which is currently an error
             const isJs = isSourceFileJavaScript(sourceFile);
             const declarationFilePath = ((forceDtsPaths || options.declaration) && !isJs) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined;
@@ -1458,7 +1458,7 @@ namespace ts {
             }
 
             const preferNewLine = node.multiLine ? ListFormat.PreferNewLine : ListFormat.None;
-            const allowTrailingComma = currentSourceFile.languageVersion >= ScriptTarget.ES5 ? ListFormat.AllowTrailingComma : ListFormat.None;
+            const allowTrailingComma = currentSourceFile.languageVersion >= ScriptTarget.ES5 && !isJsonSourceFile(currentSourceFile) ? ListFormat.AllowTrailingComma : ListFormat.None;
             emitList(node, node.properties, ListFormat.ObjectLiteralExpressionProperties | allowTrailingComma | preferNewLine);
 
             if (indentedFlag) {

src/compiler/factory.ts

@@ -2432,12 +2432,13 @@ namespace ts {
 
     // Top-level nodes
 
-    export function updateSourceFileNode(node: SourceFile, statements: ReadonlyArray<Statement>, isDeclarationFile?: boolean, referencedFiles?: SourceFile["referencedFiles"], typeReferences?: SourceFile["typeReferenceDirectives"], hasNoDefaultLib?: boolean) {
+    export function updateSourceFileNode(node: SourceFile, statements: ReadonlyArray<Statement>, isDeclarationFile?: boolean, referencedFiles?: SourceFile["referencedFiles"], typeReferences?: SourceFile["typeReferenceDirectives"], hasNoDefaultLib?: boolean, libReferences?: SourceFile["libReferenceDirectives"]) {
         if (
             node.statements !== statements ||
             (isDeclarationFile !== undefined && node.isDeclarationFile !== isDeclarationFile) ||
             (referencedFiles !== undefined && node.referencedFiles !== referencedFiles) ||
             (typeReferences !== undefined && node.typeReferenceDirectives !== typeReferences) ||
+            (libReferences !== undefined && node.libReferenceDirectives !== libReferences) ||
             (hasNoDefaultLib !== undefined && node.hasNoDefaultLib !== hasNoDefaultLib)
         ) {
             const updated = <SourceFile>createSynthesizedNode(SyntaxKind.SourceFile);
@@ -2451,6 +2452,7 @@ namespace ts {
             updated.referencedFiles = referencedFiles === undefined ? node.referencedFiles : referencedFiles;
             updated.typeReferenceDirectives = typeReferences === undefined ? node.typeReferenceDirectives : typeReferences;
             updated.hasNoDefaultLib = hasNoDefaultLib === undefined ? node.hasNoDefaultLib : hasNoDefaultLib;
+            updated.libReferenceDirectives = libReferences === undefined ? node.libReferenceDirectives : libReferences;
             if (node.amdDependencies !== undefined) updated.amdDependencies = node.amdDependencies;
             if (node.moduleName !== undefined) updated.moduleName = node.moduleName;
             if (node.languageVariant !== undefined) updated.languageVariant = node.languageVariant;

src/compiler/moduleNameResolver.ts

@@ -132,10 +132,6 @@ namespace ts {
         }
     }
 
-    export interface GetEffectiveTypeRootsHost {
-        directoryExists?(directoryName: string): boolean;
-        getCurrentDirectory?(): string;
-    }
     export function getEffectiveTypeRoots(options: CompilerOptions, host: GetEffectiveTypeRootsHost): string[] | undefined {
         if (options.typeRoots) {
             return options.typeRoots;

src/compiler/moduleSpecifiers.ts

@@ -1,92 +1,129 @@
 // Used by importFixes to synthesize import module specifiers.
 /* @internal */
 namespace ts.moduleSpecifiers {
+    export interface ModuleSpecifierPreferences {
+        importModuleSpecifierPreference?: "relative" | "non-relative";
+    }
+
+    // Note: fromSourceFile is just for usesJsExtensionOnImports
+    export function getModuleSpecifier(compilerOptions: CompilerOptions, fromSourceFile: SourceFile, fromSourceFileName: string, toFileName: string, host: ModuleSpecifierResolutionHost, preferences: ModuleSpecifierPreferences = {}) {
+        const info = getInfo(compilerOptions, fromSourceFile, fromSourceFileName, host);
+        return getGlobalModuleSpecifier(toFileName, info, host, compilerOptions) ||
+            first(getLocalModuleSpecifiers(toFileName, info, compilerOptions, preferences));
+    }
+
     // For each symlink/original for a module, returns a list of ways to import that file.
     export function getModuleSpecifiers(
         moduleSymbol: Symbol,
         program: Program,
         importingSourceFile: SourceFile,
-        host: LanguageServiceHost,
-        preferences: UserPreferences,
+        host: ModuleSpecifierResolutionHost,
+        preferences: ModuleSpecifierPreferences,
     ): ReadonlyArray<ReadonlyArray<string>> {
-        const compilerOptions = program.getCompilerOptions();
-        const { baseUrl, paths, rootDirs } = compilerOptions;
-        const moduleResolutionKind = getEmitModuleResolutionKind(compilerOptions);
-        const addJsExtension = usesJsExtensionOnImports(importingSourceFile);
-        const getCanonicalFileName = hostGetCanonicalFileName(host);
-        const sourceDirectory = getDirectoryPath(importingSourceFile.fileName);
-
         const ambient = tryGetModuleNameFromAmbientModule(moduleSymbol);
         if (ambient) return [[ambient]];
 
-        const modulePaths = getAllModulePaths(program, moduleSymbol.valueDeclaration.getSourceFile());
+        const compilerOptions = program.getCompilerOptions();
+        const info = getInfo(compilerOptions, importingSourceFile, importingSourceFile.fileName, host);
+        const modulePaths = getAllModulePaths(program, getSourceFileOfNode(moduleSymbol.valueDeclaration));
 
-        const global = mapDefined(modulePaths, moduleFileName =>
-            tryGetModuleNameFromTypeRoots(compilerOptions, host, getCanonicalFileName, moduleFileName, addJsExtension) ||
-            tryGetModuleNameAsNodeModule(compilerOptions, moduleFileName, host, getCanonicalFileName, sourceDirectory) ||
-            rootDirs && tryGetModuleNameFromRootDirs(rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName));
-        if (global.length) return global.map(g => [g]);
+        const global = mapDefined(modulePaths, moduleFileName => getGlobalModuleSpecifier(moduleFileName, info, host, compilerOptions));
+        return global.length ? global.map(g => [g]) : modulePaths.map(moduleFileName =>
+            getLocalModuleSpecifiers(moduleFileName, info, compilerOptions, preferences));
+    }
 
-        return modulePaths.map(moduleFileName => {
-            const relativePath = removeExtensionAndIndexPostFix(ensurePathIsNonModuleName(getRelativePathFromDirectory(sourceDirectory, moduleFileName, getCanonicalFileName)), moduleResolutionKind, addJsExtension);
-            if (!baseUrl || preferences.importModuleSpecifierPreference === "relative") {
-                return [relativePath];
+    interface Info {
+        readonly moduleResolutionKind: ModuleResolutionKind;
+        readonly addJsExtension: boolean;
+        readonly getCanonicalFileName: GetCanonicalFileName;
+        readonly sourceDirectory: string;
+    }
+    // importingSourceFileName is separate because getEditsForFileRename may need to specify an updated path
+    function getInfo(compilerOptions: CompilerOptions, importingSourceFile: SourceFile, importingSourceFileName: string, host: ModuleSpecifierResolutionHost): Info {
+        const moduleResolutionKind = getEmitModuleResolutionKind(compilerOptions);
+        const addJsExtension = usesJsExtensionOnImports(importingSourceFile);
+        const getCanonicalFileName = createGetCanonicalFileName(host.useCaseSensitiveFileNames ? host.useCaseSensitiveFileNames() : true);
+        const sourceDirectory = getDirectoryPath(importingSourceFileName);
+        return { moduleResolutionKind, addJsExtension, getCanonicalFileName, sourceDirectory };
+    }
+
+    function getGlobalModuleSpecifier(
+        moduleFileName: string,
+        { addJsExtension, getCanonicalFileName, sourceDirectory }: Info,
+        host: ModuleSpecifierResolutionHost,
+        compilerOptions: CompilerOptions,
+    ) {
+        return tryGetModuleNameFromTypeRoots(compilerOptions, host, getCanonicalFileName, moduleFileName, addJsExtension)
+            || tryGetModuleNameAsNodeModule(compilerOptions, moduleFileName, host, getCanonicalFileName, sourceDirectory)
+            || compilerOptions.rootDirs && tryGetModuleNameFromRootDirs(compilerOptions.rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName);
+    }
+
+    function getLocalModuleSpecifiers(
+        moduleFileName: string,
+        { moduleResolutionKind, addJsExtension, getCanonicalFileName, sourceDirectory }: Info,
+        compilerOptions: CompilerOptions,
+        preferences: ModuleSpecifierPreferences,
+    ) {
+        const { baseUrl, paths } = compilerOptions;
+
+        const relativePath = removeExtensionAndIndexPostFix(ensurePathIsNonModuleName(getRelativePathFromDirectory(sourceDirectory, moduleFileName, getCanonicalFileName)), moduleResolutionKind, addJsExtension);
+        if (!baseUrl || preferences.importModuleSpecifierPreference === "relative") {
+            return [relativePath];
+        }
+
+        const relativeToBaseUrl = getRelativePathIfInDirectory(moduleFileName, baseUrl, getCanonicalFileName);
+        if (!relativeToBaseUrl) {
+            return [relativePath];
+        }
+
+        const importRelativeToBaseUrl = removeExtensionAndIndexPostFix(relativeToBaseUrl, moduleResolutionKind, addJsExtension);
+        if (paths) {
+            const fromPaths = tryGetModuleNameFromPaths(removeFileExtension(relativeToBaseUrl), importRelativeToBaseUrl, paths);
+            if (fromPaths) {
+                return [fromPaths];
             }
+        }
 
-            const relativeToBaseUrl = getRelativePathIfInDirectory(moduleFileName, baseUrl, getCanonicalFileName);
-            if (!relativeToBaseUrl) {
-                return [relativePath];
-            }
+        if (preferences.importModuleSpecifierPreference === "non-relative") {
+            return [importRelativeToBaseUrl];
+        }
 
-            const importRelativeToBaseUrl = removeExtensionAndIndexPostFix(relativeToBaseUrl, moduleResolutionKind, addJsExtension);
-            if (paths) {
-                const fromPaths = tryGetModuleNameFromPaths(removeFileExtension(relativeToBaseUrl), importRelativeToBaseUrl, paths);
-                if (fromPaths) {
-                    return [fromPaths];
-                }
-            }
+        if (preferences.importModuleSpecifierPreference !== undefined) Debug.assertNever(preferences.importModuleSpecifierPreference);
 
-            if (preferences.importModuleSpecifierPreference === "non-relative") {
-                return [importRelativeToBaseUrl];
-            }
+        if (isPathRelativeToParent(relativeToBaseUrl)) {
+            return [relativePath];
+        }
 
-            if (preferences.importModuleSpecifierPreference !== undefined) Debug.assertNever(preferences.importModuleSpecifierPreference);
+        /*
+        Prefer a relative import over a baseUrl import if it doesn't traverse up to baseUrl.
 
-            if (isPathRelativeToParent(relativeToBaseUrl)) {
-                return [relativePath];
-            }
+        Suppose we have:
+            baseUrl = /base
+            sourceDirectory = /base/a/b
+            moduleFileName = /base/foo/bar
+        Then:
+            relativePath = ../../foo/bar
+            getRelativePathNParents(relativePath) = 2
+            pathFromSourceToBaseUrl = ../../
+            getRelativePathNParents(pathFromSourceToBaseUrl) = 2
+            2 < 2 = false
+        In this case we should prefer using the baseUrl path "/a/b" instead of the relative path "../../foo/bar".
 
-            /*
-            Prefer a relative import over a baseUrl import if it doesn't traverse up to baseUrl.
-
-            Suppose we have:
-                baseUrl = /base
-                sourceDirectory = /base/a/b
-                moduleFileName = /base/foo/bar
-            Then:
-                relativePath = ../../foo/bar
-                getRelativePathNParents(relativePath) = 2
-                pathFromSourceToBaseUrl = ../../
-                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
-                2 < 2 = false
-            In this case we should prefer using the baseUrl path "/a/b" instead of the relative path "../../foo/bar".
-
-            Suppose we have:
-                baseUrl = /base
-                sourceDirectory = /base/foo/a
-                moduleFileName = /base/foo/bar
-            Then:
-                relativePath = ../a
-                getRelativePathNParents(relativePath) = 1
-                pathFromSourceToBaseUrl = ../../
-                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
-                1 < 2 = true
-            In this case we should prefer using the relative path "../a" instead of the baseUrl path "foo/a".
-            */
-            const pathFromSourceToBaseUrl = ensurePathIsNonModuleName(getRelativePathFromDirectory(sourceDirectory, baseUrl, getCanonicalFileName));
-            const relativeFirst = getRelativePathNParents(relativePath) < getRelativePathNParents(pathFromSourceToBaseUrl);
-            return relativeFirst ? [relativePath, importRelativeToBaseUrl] : [importRelativeToBaseUrl, relativePath];
-        });
+        Suppose we have:
+            baseUrl = /base
+            sourceDirectory = /base/foo/a
+            moduleFileName = /base/foo/bar
+        Then:
+            relativePath = ../a
+            getRelativePathNParents(relativePath) = 1
+            pathFromSourceToBaseUrl = ../../
+            getRelativePathNParents(pathFromSourceToBaseUrl) = 2
+            1 < 2 = true
+        In this case we should prefer using the relative path "../a" instead of the baseUrl path "foo/a".
+        */
+        const pathFromSourceToBaseUrl = ensurePathIsNonModuleName(getRelativePathFromDirectory(sourceDirectory, baseUrl, getCanonicalFileName));
+        const relativeFirst = getRelativePathNParents(relativePath) < getRelativePathNParents(pathFromSourceToBaseUrl);
+        return relativeFirst ? [relativePath, importRelativeToBaseUrl] : [importRelativeToBaseUrl, relativePath];
     }
 
     function usesJsExtensionOnImports({ imports }: SourceFile): boolean {
@@ -176,7 +213,7 @@ namespace ts.moduleSpecifiers {
     function tryGetModuleNameAsNodeModule(
         options: CompilerOptions,
         moduleFileName: string,
-        host: LanguageServiceHost,
+        host: ModuleSpecifierResolutionHost,
         getCanonicalFileName: (file: string) => string,
         sourceDirectory: string,
     ): string | undefined {
@@ -222,7 +259,8 @@ namespace ts.moduleSpecifiers {
             const fullModulePathWithoutExtension = removeFileExtension(path);
 
             // If the file is /index, it can be imported by its directory name
-            if (getCanonicalFileName(fullModulePathWithoutExtension.substring(parts.fileNameIndex)) === "/index") {
+            // IFF there is not _also_ a file by the same name
+            if (getCanonicalFileName(fullModulePathWithoutExtension.substring(parts.fileNameIndex)) === "/index" && !tryGetAnyFileFromPath(host, fullModulePathWithoutExtension.substring(0, parts.fileNameIndex))) {
                 return fullModulePathWithoutExtension.substring(0, parts.fileNameIndex);
             }
 
@@ -230,6 +268,17 @@ namespace ts.moduleSpecifiers {
         }
     }
 
+    function tryGetAnyFileFromPath(host: ModuleSpecifierResolutionHost, path: string) {
+        // We check all js, `node` and `json` extensions in addition to TS, since node module resolution would also choose those over the directory
+        const extensions = getSupportedExtensions({ allowJs: true }, [{ extension: "node", isMixedContent: false }, { extension: "json", isMixedContent: false, scriptKind: ScriptKind.JSON }]);
+        for (const e of extensions) {
+            const fullPath = path + e;
+            if (host.fileExists!(fullPath)) { // TODO: GH#18217
+                return fullPath;
+            }
+        }
+    }
+
     interface NodeModulePathParts {
         readonly topLevelNodeModulesIndex: number;
         readonly topLevelPackageNameIndex: number;

src/compiler/parser.ts

@@ -4,7 +4,6 @@ namespace ts {
         Yield = 1 << 0,
         Await = 1 << 1,
         Type  = 1 << 2,
-        RequireCompleteParameterList = 1 << 3,
         IgnoreMissingOpenBrace = 1 << 4,
         JSDoc = 1 << 5,
     }
@@ -717,6 +716,7 @@ namespace ts {
             initializeState(sourceText, languageVersion, syntaxCursor, ScriptKind.JSON);
             // Set source file so that errors will be reported with this file name
             sourceFile = createSourceFile(fileName, ScriptTarget.ES2015, ScriptKind.JSON, /*isDeclaration*/ false);
+            sourceFile.flags = contextFlags;
 
             // Prime the scanner.
             nextToken();
@@ -1256,8 +1256,8 @@ namespace ts {
                 new TokenConstructor(kind, p, p);
         }
 
-        function createNodeWithJSDoc(kind: SyntaxKind): Node {
-            const node = createNode(kind);
+        function createNodeWithJSDoc(kind: SyntaxKind, pos?: number): Node {
+            const node = createNode(kind, pos);
             if (scanner.getTokenFlags() & TokenFlags.PrecedingJSDocComment) {
                 addJSDocComment(<HasJSDoc>node);
             }
@@ -2256,6 +2256,24 @@ namespace ts {
             return finishNode(node);
         }
 
+        // If true, we should abort parsing an error function.
+        function typeHasArrowFunctionBlockingParseError(node: TypeNode): boolean {
+            switch (node.kind) {
+                case SyntaxKind.TypeReference:
+                    return nodeIsMissing((node as TypeReferenceNode).typeName);
+                case SyntaxKind.FunctionType:
+                case SyntaxKind.ConstructorType: {
+                    const { parameters, type } = node as FunctionOrConstructorTypeNode;
+                    // parameters.pos === parameters.end only if we used parseMissingList, else should contain at least `()`
+                    return parameters.pos === parameters.end || typeHasArrowFunctionBlockingParseError(type);
+                }
+                case SyntaxKind.ParenthesizedType:
+                    return typeHasArrowFunctionBlockingParseError((node as ParenthesizedTypeNode).type);
+                default:
+                    return false;
+            }
+        }
+
         function parseThisTypePredicate(lhs: ThisTypeNode): TypePredicateNode {
             nextToken();
             const node = createNode(SyntaxKind.TypePredicate, lhs.pos) as TypePredicateNode;
@@ -2342,7 +2360,7 @@ namespace ts {
             return finishNode(parameter);
         }
 
-        function parseJSDocType() {
+        function parseJSDocType(): TypeNode {
             const dotdotdot = parseOptionalToken(SyntaxKind.DotDotDotToken);
             let type = parseType();
             if (dotdotdot) {
@@ -2450,6 +2468,7 @@ namespace ts {
         }
 
         /**
+         * Note: If returnToken is EqualsGreaterThanToken, `signature.type` will always be defined.
          * @returns If return type parsing succeeds
          */
         function fillSignature(
@@ -2459,12 +2478,12 @@ namespace ts {
             if (!(flags & SignatureFlags.JSDoc)) {
                 signature.typeParameters = parseTypeParameters();
             }
-            signature.parameters = parseParameterList(flags)!; // TODO: GH#18217
+            const parametersParsedSuccessfully = parseParameterList(signature, flags);
             if (shouldParseReturnType(returnToken, !!(flags & SignatureFlags.Type))) {
                 signature.type = parseTypeOrTypePredicate();
-                return signature.type !== undefined;
+                if (typeHasArrowFunctionBlockingParseError(signature.type)) return false;
             }
-            return true;
+            return parametersParsedSuccessfully;
         }
 
         function shouldParseReturnType(returnToken: SyntaxKind.ColonToken | SyntaxKind.EqualsGreaterThanToken, isType: boolean): boolean {
@@ -2484,7 +2503,8 @@ namespace ts {
             return false;
         }
 
-        function parseParameterList(flags: SignatureFlags) {
+        // Returns true on success.
+        function parseParameterList(signature: SignatureDeclaration, flags: SignatureFlags): boolean {
             // FormalParameters [Yield,Await]: (modified)
             //      [empty]
             //      FormalParameterList[?Yield,Await]
@@ -2498,31 +2518,23 @@ namespace ts {
             //
             // SingleNameBinding [Yield,Await]:
             //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            if (parseExpected(SyntaxKind.OpenParenToken)) {
-                const savedYieldContext = inYieldContext();
-                const savedAwaitContext = inAwaitContext();
-
-                setYieldContext(!!(flags & SignatureFlags.Yield));
-                setAwaitContext(!!(flags & SignatureFlags.Await));
-
-                const result = parseDelimitedList(ParsingContext.Parameters, flags & SignatureFlags.JSDoc ? parseJSDocParameter : parseParameter);
-
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-
-                if (!parseExpected(SyntaxKind.CloseParenToken) && (flags & SignatureFlags.RequireCompleteParameterList)) {
-                    // Caller insisted that we had to end with a )   We didn't.  So just return
-                    // undefined here.
-                    return undefined;
-                }
-
-                return result;
+            if (!parseExpected(SyntaxKind.OpenParenToken)) {
+                signature.parameters = createMissingList<ParameterDeclaration>();
+                return false;
             }
 
-            // We didn't even have an open paren.  If the caller requires a complete parameter list,
-            // we definitely can't provide that.  However, if they're ok with an incomplete one,
-            // then just return an empty set of parameters.
-            return (flags & SignatureFlags.RequireCompleteParameterList) ? undefined : createMissingList<ParameterDeclaration>();
+            const savedYieldContext = inYieldContext();
+            const savedAwaitContext = inAwaitContext();
+
+            setYieldContext(!!(flags & SignatureFlags.Yield));
+            setAwaitContext(!!(flags & SignatureFlags.Await));
+
+            signature.parameters = parseDelimitedList(ParsingContext.Parameters, flags & SignatureFlags.JSDoc ? parseJSDocParameter : parseParameter);
+
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+
+            return parseExpected(SyntaxKind.CloseParenToken);
         }
 
         function parseTypeMemberSemicolon() {
@@ -2771,28 +2783,19 @@ namespace ts {
             return finishNode(node);
         }
 
-        function parseParenthesizedType(): ParenthesizedTypeNode {
+        function parseParenthesizedType(): TypeNode {
             const node = <ParenthesizedTypeNode>createNode(SyntaxKind.ParenthesizedType);
             parseExpected(SyntaxKind.OpenParenToken);
             node.type = parseType();
-            if (!node.type) {
-                return undefined!; // TODO: GH#18217
-            }
             parseExpected(SyntaxKind.CloseParenToken);
             return finishNode(node);
         }
 
-        function parseFunctionOrConstructorType(kind: SyntaxKind): FunctionOrConstructorTypeNode | undefined {
-            const node = <FunctionOrConstructorTypeNode>createNodeWithJSDoc(kind);
-            if (kind === SyntaxKind.ConstructorType) {
-                parseExpected(SyntaxKind.NewKeyword);
-            }
-            if (!fillSignature(SyntaxKind.EqualsGreaterThanToken, SignatureFlags.Type | (sourceFile.languageVariant === LanguageVariant.JSX ? SignatureFlags.RequireCompleteParameterList : 0), node)) {
-                return undefined;
-            }
-            if (!node.parameters) {
-                return undefined;
-            }
+        function parseFunctionOrConstructorType(): TypeNode {
+            const pos = getNodePos();
+            const kind = parseOptional(SyntaxKind.NewKeyword) ? SyntaxKind.ConstructorType : SyntaxKind.FunctionType;
+            const node = <FunctionOrConstructorTypeNode>createNodeWithJSDoc(kind, pos);
+            fillSignature(SyntaxKind.EqualsGreaterThanToken, SignatureFlags.Type, node);
             return finishNode(node);
         }
 
@@ -3133,11 +3136,8 @@ namespace ts {
         }
 
         function parseTypeWorker(noConditionalTypes?: boolean): TypeNode {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(SyntaxKind.FunctionType)!; // TODO: GH#18217
-            }
-            if (token() === SyntaxKind.NewKeyword) {
-                return parseFunctionOrConstructorType(SyntaxKind.ConstructorType)!;
+            if (isStartOfFunctionType() || token() === SyntaxKind.NewKeyword) {
+                return parseFunctionOrConstructorType();
             }
             const type = parseUnionTypeOrHigher();
             if (!noConditionalTypes && !scanner.hasPrecedingLineBreak() && parseOptional(SyntaxKind.ExtendsKeyword)) {
@@ -3625,12 +3625,7 @@ namespace ts {
             // a => (b => c)
             // And think that "(b =>" was actually a parenthesized arrow function with a missing
             // close paren.
-            if (!fillSignature(SyntaxKind.ColonToken, isAsync | (allowAmbiguity ? SignatureFlags.None : SignatureFlags.RequireCompleteParameterList), node)) {
-                return undefined;
-            }
-
-            // If we couldn't get parameters, we definitely could not parse out an arrow function.
-            if (!node.parameters) {
+            if (!fillSignature(SyntaxKind.ColonToken, isAsync, node) && !allowAmbiguity) {
                 return undefined;
             }
 
@@ -4147,27 +4142,6 @@ namespace ts {
             return finishNode(node);
         }
 
-        function tagNamesAreEquivalent(lhs: JsxTagNameExpression, rhs: JsxTagNameExpression): boolean {
-            if (lhs.kind !== rhs.kind) {
-                return false;
-            }
-
-            if (lhs.kind === SyntaxKind.Identifier) {
-                return (<Identifier>lhs).escapedText === (<Identifier>rhs).escapedText;
-            }
-
-            if (lhs.kind === SyntaxKind.ThisKeyword) {
-                return true;
-            }
-
-            // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
-            // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
-            // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
-            return (<PropertyAccessExpression>lhs).name.escapedText === (<PropertyAccessExpression>rhs).name.escapedText &&
-                tagNamesAreEquivalent((<PropertyAccessExpression>lhs).expression as JsxTagNameExpression, (<PropertyAccessExpression>rhs).expression as JsxTagNameExpression);
-        }
-
-
         function parseJsxElementOrSelfClosingElementOrFragment(inExpressionContext: boolean): JsxElement | JsxSelfClosingElement | JsxFragment {
             const opening = parseJsxOpeningOrSelfClosingElementOrOpeningFragment(inExpressionContext);
             let result: JsxElement | JsxSelfClosingElement | JsxFragment;
@@ -6385,17 +6359,14 @@ namespace ts {
                         indent += text.length;
                     }
 
-                    let t = nextJSDocToken();
-                    while (t === SyntaxKind.WhitespaceTrivia) {
-                        t = nextJSDocToken();
-                    }
-                    if (t === SyntaxKind.NewLineTrivia) {
+                    nextJSDocToken();
+                    while (parseOptionalJsdoc(SyntaxKind.WhitespaceTrivia));
+                    if (parseOptionalJsdoc(SyntaxKind.NewLineTrivia)) {
                         state = JSDocState.BeginningOfLine;
                         indent = 0;
-                        t = nextJSDocToken();
                     }
                     loop: while (true) {
-                        switch (t) {
+                        switch (token()) {
                             case SyntaxKind.AtToken:
                                 if (state === JSDocState.BeginningOfLine || state === JSDocState.SawAsterisk) {
                                     removeTrailingNewlines(comments);
@@ -6455,12 +6426,11 @@ namespace ts {
                                 pushComment(scanner.getTokenText());
                                 break;
                         }
-                        t = nextJSDocToken();
+                        nextJSDocToken();
                     }
                     removeLeadingNewlines(comments);
                     removeTrailingNewlines(comments);
                     result = createJSDocComment();
-
                 });
 
                 return result;
@@ -6516,54 +6486,42 @@ namespace ts {
 
                     const tagName = parseJSDocIdentifierName();
                     skipWhitespace();
-                    if (!tagName) {
-                        return;
-                    }
 
                     let tag: JSDocTag | undefined;
-                    if (tagName) {
-                        switch (tagName.escapedText) {
-                            case "augments":
-                            case "extends":
-                                tag = parseAugmentsTag(atToken, tagName);
-                                break;
-                            case "class":
-                            case "constructor":
-                                tag = parseClassTag(atToken, tagName);
-                                break;
-                            case "arg":
-                            case "argument":
-                            case "param":
-                                return parseParameterOrPropertyTag(atToken, tagName, PropertyLikeParse.Parameter, indent);
-                            case "return":
-                            case "returns":
-                                tag = parseReturnTag(atToken, tagName);
-                                break;
-                            case "template":
-                                tag = parseTemplateTag(atToken, tagName);
-                                break;
-                            case "type":
-                                tag = parseTypeTag(atToken, tagName);
-                                break;
-                            case "typedef":
-                                tag = parseTypedefTag(atToken, tagName, indent);
-                                break;
-                            case "callback":
-                                tag = parseCallbackTag(atToken, tagName, indent);
-                                break;
-                            default:
-                                tag = parseUnknownTag(atToken, tagName);
-                                break;
-                        }
-                    }
-                    else {
-                        tag = parseUnknownTag(atToken, tagName);
+                    switch (tagName.escapedText) {
+                        case "augments":
+                        case "extends":
+                            tag = parseAugmentsTag(atToken, tagName);
+                            break;
+                        case "class":
+                        case "constructor":
+                            tag = parseClassTag(atToken, tagName);
+                            break;
+                        case "arg":
+                        case "argument":
+                        case "param":
+                            return parseParameterOrPropertyTag(atToken, tagName, PropertyLikeParse.Parameter, indent);
+                        case "return":
+                        case "returns":
+                            tag = parseReturnTag(atToken, tagName);
+                            break;
+                        case "template":
+                            tag = parseTemplateTag(atToken, tagName);
+                            break;
+                        case "type":
+                            tag = parseTypeTag(atToken, tagName);
+                            break;
+                        case "typedef":
+                            tag = parseTypedefTag(atToken, tagName, indent);
+                            break;
+                        case "callback":
+                            tag = parseCallbackTag(atToken, tagName, indent);
+                            break;
+                        default:
+                            tag = parseUnknownTag(atToken, tagName);
+                            break;
                     }
 
-                    if (!tag) {
-                        // a badly malformed tag should not be added to the list of tags
-                        return;
-                    }
                     if (!tag.comment) {
                         // some tags, like typedef and callback, have already parsed their comments earlier
                         tag.comment = parseTagComments(indent + tag.end - tag.pos);
@@ -6793,11 +6751,11 @@ namespace ts {
                 }
 
                 function parsePropertyAccessEntityNameExpression() {
-                    let node: Identifier | PropertyAccessEntityNameExpression = parseJSDocIdentifierName(/*createIfMissing*/ true);
+                    let node: Identifier | PropertyAccessEntityNameExpression = parseJSDocIdentifierName();
                     while (parseOptional(SyntaxKind.DotToken)) {
                         const prop: PropertyAccessEntityNameExpression = createNode(SyntaxKind.PropertyAccessExpression, node.pos) as PropertyAccessEntityNameExpression;
                         prop.expression = node;
-                        prop.name = parseJSDocIdentifierName()!; // TODO: GH#18217
+                        prop.name = parseJSDocIdentifierName();
                         node = finishNode(prop);
                     }
                     return node;
@@ -6862,9 +6820,11 @@ namespace ts {
 
                 function parseJSDocTypeNameWithNamespace(nested?: boolean) {
                     const pos = scanner.getTokenPos();
+                    if (!tokenIsIdentifierOrKeyword(token())) {
+                        return undefined;
+                    }
                     const typeNameOrNamespaceName = parseJSDocIdentifierName();
-
-                    if (typeNameOrNamespaceName && parseOptional(SyntaxKind.DotToken)) {
+                    if (parseOptional(SyntaxKind.DotToken)) {
                         const jsDocNamespaceNode = <JSDocNamespaceDeclaration>createNode(SyntaxKind.ModuleDeclaration, pos);
                         if (nested) {
                             jsDocNamespaceNode.flags |= NodeFlags.NestedNamespace;
@@ -6874,7 +6834,7 @@ namespace ts {
                         return finishNode(jsDocNamespaceNode);
                     }
 
-                    if (typeNameOrNamespaceName && nested) {
+                    if (nested) {
                         typeNameOrNamespaceName.isInJSDocNamespace = true;
                     }
                     return typeNameOrNamespaceName;
@@ -6897,8 +6857,7 @@ namespace ts {
                         jsdocSignature.parameters = append(jsdocSignature.parameters as MutableNodeArray<JSDocParameterTag>, child);
                     }
                     const returnTag = tryParse(() => {
-                        if (token() === SyntaxKind.AtToken) {
-                            nextJSDocToken();
+                        if (parseOptionalJsdoc(SyntaxKind.AtToken)) {
                             const tag = parseTag(indent);
                             if (tag && tag.kind === SyntaxKind.JSDocReturnTag) {
                                 return tag as JSDocReturnTag;
@@ -6985,9 +6944,6 @@ namespace ts {
 
                     const tagName = parseJSDocIdentifierName();
                     skipWhitespace();
-                    if (!tagName) {
-                        return false;
-                    }
                     let t: PropertyLikeParse;
                     switch (tagName.escapedText) {
                         case "type":
@@ -7012,36 +6968,26 @@ namespace ts {
                     return tag;
                 }
 
-                function parseTemplateTag(atToken: AtToken, tagName: Identifier): JSDocTemplateTag | undefined {
-                    if (some(tags, isJSDocTemplateTag)) {
-                        parseErrorAt(tagName.pos, scanner.getTokenPos(), Diagnostics._0_tag_already_specified, tagName.escapedText);
+                function parseTemplateTag(atToken: AtToken, tagName: Identifier): JSDocTemplateTag {
+                    // the template tag looks like '@template {Constraint} T,U,V'
+                    let constraint: JSDocTypeExpression | undefined;
+                    if (token() === SyntaxKind.OpenBraceToken) {
+                        constraint = parseJSDocTypeExpression();
                     }
 
-                    // Type parameter list looks like '@template T,U,V'
                     const typeParameters = [];
                     const typeParametersPos = getNodePos();
-
-                    while (true) {
+                    do {
+                        skipWhitespace();
                         const typeParameter = <TypeParameterDeclaration>createNode(SyntaxKind.TypeParameter);
-                        const name = parseJSDocIdentifierNameWithOptionalBraces();
+                        typeParameter.name = parseJSDocIdentifierName(Diagnostics.Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces);
                         skipWhitespace();
-                        if (!name) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-
-                        typeParameter.name = name;
                         finishNode(typeParameter);
-
                         typeParameters.push(typeParameter);
+                    } while (parseOptionalJsdoc(SyntaxKind.CommaToken));
 
-                        if (token() === SyntaxKind.CommaToken) {
-                            nextJSDocToken();
-                            skipWhitespace();
-                        }
-                        else {
-                            break;
-                        }
+                    if (constraint) {
+                        first(typeParameters).constraint = constraint.type;
                     }
 
                     const result = <JSDocTemplateTag>createNode(SyntaxKind.JSDocTemplateTag, atToken.pos);
@@ -7052,21 +6998,20 @@ namespace ts {
                     return result;
                 }
 
-                function parseJSDocIdentifierNameWithOptionalBraces(): Identifier | undefined {
-                    const parsedBrace = parseOptional(SyntaxKind.OpenBraceToken);
-                    const res = parseJSDocIdentifierName();
-                    if (parsedBrace) {
-                        parseExpected(SyntaxKind.CloseBraceToken);
-                    }
-                    return res;
-                }
-
                 function nextJSDocToken(): JsDocSyntaxKind {
                     return currentToken = scanner.scanJSDocToken();
                 }
 
+                function parseOptionalJsdoc(t: JsDocSyntaxKind): boolean {
+                    if (token() === t) {
+                        nextJSDocToken();
+                        return true;
+                    }
+                    return false;
+                }
+
                 function parseJSDocEntityName(): EntityName {
-                    let entity: EntityName = parseJSDocIdentifierName(/*createIfMissing*/ true);
+                    let entity: EntityName = parseJSDocIdentifierName();
                     if (parseOptional(SyntaxKind.OpenBracketToken)) {
                         parseExpected(SyntaxKind.CloseBracketToken);
                         // Note that y[] is accepted as an entity name, but the postfix brackets are not saved for checking.
@@ -7074,7 +7019,7 @@ namespace ts {
                         // but it's not worth it to enforce that restriction.
                     }
                     while (parseOptional(SyntaxKind.DotToken)) {
-                        const name = parseJSDocIdentifierName(/*createIfMissing*/ true);
+                        const name = parseJSDocIdentifierName();
                         if (parseOptional(SyntaxKind.OpenBracketToken)) {
                             parseExpected(SyntaxKind.CloseBracketToken);
                         }
@@ -7083,17 +7028,9 @@ namespace ts {
                     return entity;
                 }
 
-                function parseJSDocIdentifierName(): Identifier | undefined;
-                function parseJSDocIdentifierName(createIfMissing: true): Identifier;
-                function parseJSDocIdentifierName(createIfMissing = false): Identifier | undefined {
+                function parseJSDocIdentifierName(message?: DiagnosticMessage): Identifier {
                     if (!tokenIsIdentifierOrKeyword(token())) {
-                        if (createIfMissing) {
-                            return createMissingNode<Identifier>(SyntaxKind.Identifier, /*reportAtCurrentPosition*/ true, Diagnostics.Identifier_expected);
-                        }
-                        else {
-                            parseErrorAtCurrentToken(Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
+                        return createMissingNode<Identifier>(SyntaxKind.Identifier, /*reportAtCurrentPosition*/ !message, message || Diagnostics.Identifier_expected);
                     }
 
                     const pos = scanner.getTokenPos();
@@ -7691,6 +7628,7 @@ namespace ts {
         checkJsDirective?: CheckJsDirective;
         referencedFiles: FileReference[];
         typeReferenceDirectives: FileReference[];
+        libReferenceDirectives: FileReference[];
         amdDependencies: AmdDependency[];
         hasNoDefaultLib?: boolean;
         moduleName?: string;
@@ -7744,6 +7682,7 @@ namespace ts {
         context.checkJsDirective = undefined;
         context.referencedFiles = [];
         context.typeReferenceDirectives = [];
+        context.libReferenceDirectives = [];
         context.amdDependencies = [];
         context.hasNoDefaultLib = false;
         context.pragmas!.forEach((entryOrList, key) => { // TODO: GH#18217
@@ -7753,6 +7692,7 @@ namespace ts {
                 case "reference": {
                     const referencedFiles = context.referencedFiles;
                     const typeReferenceDirectives = context.typeReferenceDirectives;
+                    const libReferenceDirectives = context.libReferenceDirectives;
                     forEach(toArray(entryOrList), (arg: PragmaPsuedoMap["reference"]) => {
                         // TODO: GH#18217
                         if (arg!.arguments["no-default-lib"]) {
@@ -7761,6 +7701,9 @@ namespace ts {
                         else if (arg!.arguments.types) {
                             typeReferenceDirectives.push({ pos: arg!.arguments.types!.pos, end: arg!.arguments.types!.end, fileName: arg!.arguments.types!.value });
                         }
+                        else if (arg!.arguments.lib) {
+                            libReferenceDirectives.push({ pos: arg!.arguments.lib!.pos, end: arg!.arguments.lib!.end, fileName: arg!.arguments.lib!.value });
+                        }
                         else if (arg!.arguments.path) {
                             referencedFiles.push({ pos: arg!.arguments.path!.pos, end: arg!.arguments.path!.end, fileName: arg!.arguments.path!.value });
                         }
@@ -7906,4 +7849,25 @@ namespace ts {
         }
         return argMap;
     }
+
+    /** @internal */
+    export function tagNamesAreEquivalent(lhs: JsxTagNameExpression, rhs: JsxTagNameExpression): boolean {
+        if (lhs.kind !== rhs.kind) {
+            return false;
+        }
+
+        if (lhs.kind === SyntaxKind.Identifier) {
+            return (<Identifier>lhs).escapedText === (<Identifier>rhs).escapedText;
+        }
+
+        if (lhs.kind === SyntaxKind.ThisKeyword) {
+            return true;
+        }
+
+        // If we are at this statement then we must have PropertyAccessExpression and because tag name in Jsx element can only
+        // take forms of JsxTagNameExpression which includes an identifier, "this" expression, or another propertyAccessExpression
+        // it is safe to case the expression property as such. See parseJsxElementName for how we parse tag name in Jsx element
+        return (<PropertyAccessExpression>lhs).name.escapedText === (<PropertyAccessExpression>rhs).name.escapedText &&
+            tagNamesAreEquivalent((<PropertyAccessExpression>lhs).expression as JsxTagNameExpression, (<PropertyAccessExpression>rhs).expression as JsxTagNameExpression);
+    }
 }

src/compiler/program.ts

@@ -491,6 +491,17 @@ namespace ts {
         };
     }
 
+    /**
+     * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
+     * that represent a compilation unit.
+     *
+     * Creating a program proceeds from a set of root files, expanding the set of inputs by following imports and
+     * triple-slash-reference-path directives transitively. '@types' and triple-slash-reference-types are also pulled in.
+     *
+     * @param createProgramOptions - The options for creating a program.
+     * @returns A 'Program' object.
+     */
+    export function createProgram(createProgramOptions: CreateProgramOptions): Program;
     /**
      * Create a new 'Program' instance. A Program is an immutable collection of 'SourceFile's and a 'CompilerOptions'
      * that represent a compilation unit.
@@ -505,7 +516,6 @@ namespace ts {
      * @param configFileParsingDiagnostics - error during config file parsing
      * @returns A 'Program' object.
      */
-    export function createProgram(createProgramOptions: CreateProgramOptions): Program;
     export function createProgram(rootNames: ReadonlyArray<string>, options: CompilerOptions, host?: CompilerHost, oldProgram?: Program, configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): Program;
     export function createProgram(rootNamesOrOptions: ReadonlyArray<string> | CreateProgramOptions, _options?: CompilerOptions, _host?: CompilerHost, _oldProgram?: Program, _configFileParsingDiagnostics?: ReadonlyArray<Diagnostic>): Program {
         const createProgramOptions = isArray(rootNamesOrOptions) ? createCreateProgramOptions(rootNamesOrOptions, _options!, _host, _oldProgram, _configFileParsingDiagnostics) : rootNamesOrOptions; // TODO: GH#18217
@@ -513,7 +523,9 @@ namespace ts {
         let { oldProgram } = createProgramOptions;
 
         let program: Program;
-        let files: SourceFile[] = [];
+        let processingDefaultLibFiles: SourceFile[] | undefined;
+        let processingOtherFiles: SourceFile[] | undefined;
+        let files: SourceFile[];
         let commonSourceDirectory: string;
         let diagnosticsProducingTypeChecker: TypeChecker;
         let noDiagnosticsTypeChecker: TypeChecker;
@@ -613,7 +625,7 @@ namespace ts {
                 if (parsedRef) {
                     if (parsedRef.commandLine.options.outFile) {
                         const dtsOutfile = changeExtension(parsedRef.commandLine.options.outFile, ".d.ts");
-                        processSourceFile(dtsOutfile, /*isDefaultLib*/ false, /*packageId*/ undefined);
+                        processSourceFile(dtsOutfile, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, /*packageId*/ undefined);
                     }
                     addProjectReferenceRedirects(parsedRef.commandLine, projectReferenceRedirects);
                 }
@@ -623,7 +635,9 @@ namespace ts {
         const shouldCreateNewSourceFile = shouldProgramCreateNewSourceFiles(oldProgram, options);
         const structuralIsReused = tryReuseStructureFromOldProgram();
         if (structuralIsReused !== StructureIsReused.Completely) {
-            forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
+            processingDefaultLibFiles = [];
+            processingOtherFiles = [];
+            forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false));
 
             // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
             const typeReferences: string[] = getAutomaticTypeDirectiveNames(options, host);
@@ -647,16 +661,19 @@ namespace ts {
                 // otherwise, using options specified in '--lib' instead of '--target' default library file
                 const defaultLibraryFileName = getDefaultLibraryFileName();
                 if (!options.lib && defaultLibraryFileName) {
-                    processRootFile(defaultLibraryFileName, /*isDefaultLib*/ true);
+                    processRootFile(defaultLibraryFileName, /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ false);
                 }
                 else {
                     forEach(options.lib, libFileName => {
-                        processRootFile(combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true);
+                        processRootFile(combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ false);
                     });
                 }
             }
 
             missingFilePaths = arrayFrom(filesByName.keys(), p => <Path>p).filter(p => !filesByName.get(p));
+            files = stableSort(processingDefaultLibFiles, compareDefaultLibFiles).concat(processingOtherFiles);
+            processingDefaultLibFiles = undefined;
+            processingOtherFiles = undefined;
         }
 
         Debug.assert(!!missingFilePaths);
@@ -686,6 +703,7 @@ namespace ts {
             getOptionsDiagnostics,
             getGlobalDiagnostics,
             getSemanticDiagnostics,
+            getSuggestionDiagnostics,
             getDeclarationDiagnostics,
             getTypeChecker,
             getClassifiableNames,
@@ -703,6 +721,7 @@ namespace ts {
             isSourceFileDefaultLibrary,
             dropDiagnosticsProducingTypeChecker,
             getSourceFileFromReference,
+            getLibFileFromReference,
             sourceFileToPackageName,
             redirectTargetsSet,
             isEmittedFile,
@@ -717,6 +736,21 @@ namespace ts {
 
         return program;
 
+        function compareDefaultLibFiles(a: SourceFile, b: SourceFile) {
+            return compareValues(getDefaultLibFilePriority(a), getDefaultLibFilePriority(b));
+        }
+
+        function getDefaultLibFilePriority(a: SourceFile) {
+            if (containsPath(defaultLibraryPath, a.fileName, /*ignoreCase*/ false)) {
+                const basename = getBaseFileName(a.fileName);
+                if (basename === "lib.d.ts" || basename === "lib.es6.d.ts") return 0;
+                const name = removeSuffix(removePrefix(basename, "lib."), ".d.ts");
+                const index = libs.indexOf(name);
+                if (index !== -1) return index + 1;
+            }
+            return libs.length + 2;
+        }
+
         function getResolvedModuleWithFailedLookupLocationsFromCache(moduleName: string, containingFile: string): ResolvedModuleWithFailedLookupLocations | undefined {
             return moduleResolutionCache && resolveModuleNameFromCache(moduleName, containingFile, moduleResolutionCache);
         }
@@ -1039,6 +1073,11 @@ namespace ts {
                 if (fileChanged) {
                     // The `newSourceFile` object was created for the new program.
 
+                    if (!arrayIsEqualTo(oldSourceFile.libReferenceDirectives, newSourceFile.libReferenceDirectives, fileReferenceIsEqualTo)) {
+                        // 'lib' references has changed. Matches behavior in changesAffectModuleResolution
+                        return oldProgram.structureIsReused = StructureIsReused.Not;
+                    }
+
                     if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
                         // value of no-default-lib has changed
                         // this will affect if default library is injected into the list of files
@@ -1171,6 +1210,9 @@ namespace ts {
                 writeFile: writeFileCallback || (
                     (fileName, data, writeByteOrderMark, onError, sourceFiles) => host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles)),
                 isEmitBlocked,
+                readFile: f => host.readFile(f),
+                fileExists: f => host.fileExists(f),
+                ...(host.directoryExists ? { directoryExists: f => host.directoryExists!(f) } : {}),
             };
         }
 
@@ -1427,6 +1469,12 @@ namespace ts {
             });
         }
 
+        function getSuggestionDiagnostics(sourceFile: SourceFile, cancellationToken: CancellationToken): ReadonlyArray<DiagnosticWithLocation> {
+            return runWithCancellationToken(() => {
+                return getDiagnosticsProducingTypeChecker().getSuggestionDiagnostics(sourceFile, cancellationToken);
+            });
+        }
+
         /**
          * Skip errors if previous line start with '// @ts-ignore' comment, not counting non-empty non-comment lines
          */
@@ -1696,8 +1744,8 @@ namespace ts {
             return configFileParsingDiagnostics || emptyArray;
         }
 
-        function processRootFile(fileName: string, isDefaultLib: boolean) {
-            processSourceFile(normalizePath(fileName), isDefaultLib, /*packageId*/ undefined);
+        function processRootFile(fileName: string, isDefaultLib: boolean, ignoreNoDefaultLib: boolean) {
+            processSourceFile(normalizePath(fileName), isDefaultLib, ignoreNoDefaultLib, /*packageId*/ undefined);
         }
 
         function fileReferenceIsEqualTo(a: FileReference, b: FileReference): boolean {
@@ -1807,11 +1855,9 @@ namespace ts {
                 else if (isLiteralImportTypeNode(node)) {
                     imports = append(imports, node.argument.literal);
                 }
-                else {
-                    collectDynamicImportOrRequireCallsForEachChild(node);
-                    if (hasJSDocNodes(node)) {
-                        forEach(node.jsDoc, collectDynamicImportOrRequireCallsForEachChild);
-                    }
+                collectDynamicImportOrRequireCallsForEachChild(node);
+                if (hasJSDocNodes(node)) {
+                    forEach(node.jsDoc, collectDynamicImportOrRequireCallsForEachChild);
                 }
             }
 
@@ -1820,6 +1866,14 @@ namespace ts {
             }
         }
 
+        function getLibFileFromReference(ref: FileReference) {
+            const libName = ref.fileName.toLocaleLowerCase();
+            const libFileName = libMap.get(libName);
+            if (libFileName) {
+                return getSourceFile(combinePaths(defaultLibraryPath, libFileName));
+            }
+        }
+
         /** This should have similar behavior to 'processSourceFile' without diagnostics or mutation. */
         function getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined {
             return getSourceFileFromReferenceWorker(resolveTripleslashReference(ref.fileName, referencingFile.fileName), fileName => filesByName.get(toPath(fileName)));
@@ -1870,9 +1924,9 @@ namespace ts {
         }
 
         /** This has side effects through `findSourceFile`. */
-        function processSourceFile(fileName: string, isDefaultLib: boolean, packageId: PackageId | undefined, refFile?: SourceFile, refPos?: number, refEnd?: number): void {
+        function processSourceFile(fileName: string, isDefaultLib: boolean, ignoreNoDefaultLib: boolean, packageId: PackageId | undefined, refFile?: SourceFile, refPos?: number, refEnd?: number): void {
             getSourceFileFromReferenceWorker(fileName,
-                fileName => findSourceFile(fileName, toPath(fileName), isDefaultLib, refFile!, refPos!, refEnd!, packageId), // TODO: GH#18217
+                fileName => findSourceFile(fileName, toPath(fileName), isDefaultLib, ignoreNoDefaultLib, refFile!, refPos!, refEnd!, packageId), // TODO: GH#18217
                 (diagnostic, ...args) => {
                     fileProcessingDiagnostics.add(refFile !== undefined && refEnd !== undefined && refPos !== undefined
                         ? createFileDiagnostic(refFile, refPos, refEnd - refPos, diagnostic, ...args)
@@ -1910,7 +1964,7 @@ namespace ts {
         }
 
         // Get source file from normalized fileName
-        function findSourceFile(fileName: string, path: Path, isDefaultLib: boolean, refFile: SourceFile, refPos: number, refEnd: number, packageId: PackageId | undefined): SourceFile | undefined {
+        function findSourceFile(fileName: string, path: Path, isDefaultLib: boolean, ignoreNoDefaultLib: boolean, refFile: SourceFile, refPos: number, refEnd: number, packageId: PackageId | undefined): SourceFile | undefined {
             if (filesByName.has(path)) {
                 const file = filesByName.get(path);
                 // try to check if we've already seen this file but with a different casing in path
@@ -1928,6 +1982,8 @@ namespace ts {
                         processTypeReferenceDirectives(file);
                     }
 
+                    processLibReferenceDirectives(file);
+
                     modulesWithElidedImports.set(file.path, false);
                     processImportedModules(file);
                 }
@@ -1978,7 +2034,7 @@ namespace ts {
                     redirectTargetsSet.set(fileFromPackageId.path, true);
                     filesByName.set(path, dupFile);
                     sourceFileToPackageName.set(path, packageId.name);
-                    files.push(dupFile);
+                    processingOtherFiles!.push(dupFile);
                     return dupFile;
                 }
                 else if (file) {
@@ -2010,21 +2066,23 @@ namespace ts {
                     }
                 }
 
-                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
+                skipDefaultLib = skipDefaultLib || (file.hasNoDefaultLib && !ignoreNoDefaultLib);
 
                 if (!options.noResolve) {
                     processReferencedFiles(file, isDefaultLib);
                     processTypeReferenceDirectives(file);
                 }
 
+                processLibReferenceDirectives(file);
+
                 // always process imported modules to record module name resolutions
                 processImportedModules(file);
 
                 if (isDefaultLib) {
-                    files.unshift(file);
+                    processingDefaultLibFiles!.push(file);
                 }
                 else {
-                    files.push(file);
+                    processingOtherFiles!.push(file);
                 }
             }
 
@@ -2051,7 +2109,7 @@ namespace ts {
         function processReferencedFiles(file: SourceFile, isDefaultLib: boolean) {
             forEach(file.referencedFiles, ref => {
                 const referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*packageId*/ undefined, file, ref.pos, ref.end);
+                processSourceFile(referencedFileName, isDefaultLib, /*ignoreNoDefaultLib*/ false, /*packageId*/ undefined, file, ref.pos, ref.end);
             });
         }
 
@@ -2086,7 +2144,7 @@ namespace ts {
             if (resolvedTypeReferenceDirective) {
                 if (resolvedTypeReferenceDirective.primary) {
                     // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName!, /*isDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd); // TODO: GH#18217
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName!, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd); // TODO: GH#18217
                 }
                 else {
                     // If we already resolved to this file, it must have been a secondary reference. Check file contents
@@ -2109,7 +2167,7 @@ namespace ts {
                     }
                     else {
                         // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName!, /*isDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd);
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName!, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, resolvedTypeReferenceDirective.packageId, refFile, refPos, refEnd);
                     }
                 }
             }
@@ -2122,6 +2180,23 @@ namespace ts {
             }
         }
 
+        function processLibReferenceDirectives(file: SourceFile) {
+            forEach(file.libReferenceDirectives, libReference => {
+                const libName = libReference.fileName.toLocaleLowerCase();
+                const libFileName = libMap.get(libName);
+                if (libFileName) {
+                    // we ignore any 'no-default-lib' reference set on this file.
+                    processRootFile(combinePaths(defaultLibraryPath, libFileName), /*isDefaultLib*/ true, /*ignoreNoDefaultLib*/ true);
+                }
+                else {
+                    const unqualifiedLibName = removeSuffix(removePrefix(libName, "lib."), ".d.ts");
+                    const suggestion = getSpellingSuggestion(unqualifiedLibName, libs, identity);
+                    const message = suggestion ? Diagnostics.Cannot_find_lib_definition_for_0_Did_you_mean_1 : Diagnostics.Cannot_find_lib_definition_for_0;
+                    fileProcessingDiagnostics.add(createDiagnostic(file, libReference.pos, libReference.end, message, libName, suggestion));
+                }
+            });
+        }
+
         function createDiagnostic(refFile: SourceFile, refPos: number, refEnd: number, message: DiagnosticMessage, ...args: any[]): Diagnostic {
             if (refFile === undefined || refPos === undefined || refEnd === undefined) {
                 return createCompilerDiagnostic(message, ...args);
@@ -2182,7 +2257,7 @@ namespace ts {
                     else if (shouldAddFile) {
                         const path = toPath(resolvedFileName);
                         const pos = skipTrivia(file.text, file.imports[i].pos);
-                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, file, pos, file.imports[i].end, resolution.packageId);
+                        findSourceFile(resolvedFileName, path, /*isDefaultLib*/ false, /*ignoreNoDefaultLib*/ false, file, pos, file.imports[i].end, resolution.packageId);
                     }
 
                     if (isFromNodeModulesSearch) {

src/compiler/sourcemap.ts

@@ -129,7 +129,7 @@ namespace ts {
          * @param sourceFileOrBundle The input source file or bundle for the program.
          */
         function initialize(filePath: string, sourceMapFilePath: string, sourceFileOrBundle: SourceFile | Bundle, outputSourceMapDataList?: SourceMapData[]) {
-            if (disabled) {
+            if (disabled || fileExtensionIs(filePath, Extension.Json)) {
                 return;
             }
 
@@ -336,7 +336,7 @@ namespace ts {
          * @param pos The position.
          */
         function emitPos(pos: number) {
-            if (disabled || positionIsSynthesized(pos)) {
+            if (disabled || positionIsSynthesized(pos) || isJsonSourceMapSource(currentSource)) {
                 return;
             }
 
@@ -403,7 +403,7 @@ namespace ts {
          * @param emitCallback The callback used to emit the node.
          */
         function emitNodeWithSourceMap(hint: EmitHint, node: Node, emitCallback: (hint: EmitHint, node: Node) => void) {
-            if (disabled) {
+            if (disabled || isInJsonFile(node)) {
                 return emitCallback(hint, node);
             }
 
@@ -485,7 +485,7 @@ namespace ts {
          * @param emitCallback The callback used to emit the token.
          */
         function emitTokenWithSourceMap(node: Node, token: SyntaxKind, writer: (s: string) => void, tokenPos: number, emitCallback: (token: SyntaxKind, writer: (s: string) => void, tokenStartPos: number) => number) {
-            if (disabled) {
+            if (disabled || isInJsonFile(node)) {
                 return emitCallback(token, writer, tokenPos);
             }
 
@@ -508,6 +508,10 @@ namespace ts {
             return tokenPos;
         }
 
+        function isJsonSourceMapSource(sourceFile: SourceMapSource) {
+            return fileExtensionIs(sourceFile.fileName, Extension.Json);
+        }
+
         /**
          * Set the current source file.
          *
@@ -521,6 +525,10 @@ namespace ts {
             currentSource = sourceFile;
             currentSourceText = currentSource.text;
 
+            if (isJsonSourceMapSource(sourceFile)) {
+                return;
+            }
+
             // Add the file to tsFilePaths
             // If sourceroot option: Use the relative path corresponding to the common directory path
             // otherwise source locations relative to map file location
@@ -550,7 +558,7 @@ namespace ts {
          * Gets the text for the source map.
          */
         function getText() {
-            if (disabled) {
+            if (disabled || isJsonSourceMapSource(currentSource)) {
                 return undefined!; // TODO: GH#18217
             }
 
@@ -563,7 +571,7 @@ namespace ts {
          * Gets the SourceMappingURL for the source map.
          */
         function getSourceMappingURL() {
-            if (disabled) {
+            if (disabled || isJsonSourceMapSource(currentSource)) {
                 return undefined!; // TODO: GH#18217
             }
 
@@ -615,4 +623,4 @@ namespace ts {
 
         return encodedStr;
     }
-}
+}

src/compiler/transformers/declarations.ts

@@ -171,12 +171,12 @@ namespace ts {
                                 [createModifier(SyntaxKind.DeclareKeyword)],
                                 createLiteral(getResolvedExternalModuleName(context.getEmitHost(), sourceFile)),
                                 createModuleBlock(setTextRange(createNodeArray(transformAndReplaceLatePaintedStatements(statements)), sourceFile.statements))
-                            )], /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false);
+                            )], /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false, /*libReferences*/ []);
                             return newFile;
                         }
                         needsDeclare = true;
                         const updated = visitNodes(sourceFile.statements, visitDeclarationStatements);
-                        return updateSourceFileNode(sourceFile, transformAndReplaceLatePaintedStatements(updated), /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false);
+                        return updateSourceFileNode(sourceFile, transformAndReplaceLatePaintedStatements(updated), /*isDeclarationFile*/ true, /*referencedFiles*/ [], /*typeReferences*/ [], /*hasNoDefaultLib*/ false, /*libReferences*/ []);
                     }
                 ), mapDefined(node.prepends, prepend => {
                     if (prepend.kind === SyntaxKind.InputFiles) {

src/compiler/transformers/ts.ts

@@ -552,7 +552,9 @@ namespace ts {
 
         function visitSourceFile(node: SourceFile) {
             const alwaysStrict = getStrictOptionValue(compilerOptions, "alwaysStrict") &&
-                !(isExternalModule(node) && moduleKind >= ModuleKind.ES2015);
+                !(isExternalModule(node) && moduleKind >= ModuleKind.ES2015) &&
+                !isJsonSourceFile(node);
+
             return updateSourceFileNode(
                 node,
                 visitLexicalEnvironment(node.statements, sourceElementVisitor, context, /*start*/ 0, alwaysStrict));

src/compiler/tsconfig.json

@@ -44,6 +44,7 @@
         "builderState.ts",
         "builder.ts",
         "resolutionCache.ts",
+        "moduleSpecifiers.ts",
         "watch.ts",
         "commandLineParser.ts",
         "tsbuild.ts",

src/compiler/types.ts

@@ -1098,11 +1098,16 @@ namespace ts {
 
     export type FunctionOrConstructorTypeNode = FunctionTypeNode | ConstructorTypeNode;
 
-    export interface FunctionTypeNode extends TypeNode, SignatureDeclarationBase {
+    export interface FunctionOrConstructorTypeNodeBase extends TypeNode, SignatureDeclarationBase {
+        kind: SyntaxKind.FunctionType | SyntaxKind.ConstructorType;
+        type: TypeNode;
+    }
+
+    export interface FunctionTypeNode extends FunctionOrConstructorTypeNodeBase {
         kind: SyntaxKind.FunctionType;
     }
 
-    export interface ConstructorTypeNode extends TypeNode, SignatureDeclarationBase {
+    export interface ConstructorTypeNode extends FunctionOrConstructorTypeNodeBase {
         kind: SyntaxKind.ConstructorType;
     }
 
@@ -2566,6 +2571,7 @@ namespace ts {
         moduleName?: string;
         referencedFiles: ReadonlyArray<FileReference>;
         typeReferenceDirectives: ReadonlyArray<FileReference>;
+        libReferenceDirectives: ReadonlyArray<FileReference>;
         languageVariant: LanguageVariant;
         isDeclarationFile: boolean;
 
@@ -2759,6 +2765,7 @@ namespace ts {
         getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<Diagnostic>;
         getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
         getConfigFileParsingDiagnostics(): ReadonlyArray<Diagnostic>;
+        /* @internal */ getSuggestionDiagnostics(sourceFile: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
 
         /**
          * Gets a type checker that can be used to semantically analyze source files in the program.
@@ -2788,6 +2795,7 @@ namespace ts {
         /* @internal */ structureIsReused?: StructureIsReused;
 
         /* @internal */ getSourceFileFromReference(referencingFile: SourceFile, ref: FileReference): SourceFile | undefined;
+        /* @internal */ getLibFileFromReference(ref: FileReference): SourceFile | undefined;
 
         /** Given a source file, get the name of the package it was imported from. */
         /* @internal */ sourceFileToPackageName: Map<string>;
@@ -3080,7 +3088,7 @@ namespace ts {
          * Does *not* get *all* suggestion diagnostics, just the ones that were convenient to report in the checker.
          * Others are added in computeSuggestionDiagnostics.
          */
-        /* @internal */ getSuggestionDiagnostics(file: SourceFile): ReadonlyArray<DiagnosticWithLocation>;
+        /* @internal */ getSuggestionDiagnostics(file: SourceFile, cancellationToken?: CancellationToken): ReadonlyArray<DiagnosticWithLocation>;
 
         /**
          * Depending on the operation performed, it may be appropriate to throw away the checker
@@ -5029,8 +5037,9 @@ namespace ts {
     }
 
     /* @internal */
-    export interface EmitHost extends ScriptReferenceHost {
+    export interface EmitHost extends ScriptReferenceHost, ModuleSpecifierResolutionHost {
         getSourceFiles(): ReadonlyArray<SourceFile>;
+        getCurrentDirectory(): string;
 
         /* @internal */
         isSourceFileFromExternalLibrary(file: SourceFile): boolean;
@@ -5292,11 +5301,15 @@ namespace ts {
         isAtStartOfLine(): boolean;
     }
 
-    /* @internal */
-    export interface ModuleNameResolverHost {
-        getCanonicalFileName(f: string): string;
-        getCommonSourceDirectory(): string;
-        getCurrentDirectory(): string;
+    export interface GetEffectiveTypeRootsHost {
+        directoryExists?(directoryName: string): boolean;
+        getCurrentDirectory?(): string;
+    }
+    /** @internal */
+    export interface ModuleSpecifierResolutionHost extends GetEffectiveTypeRootsHost {
+        useCaseSensitiveFileNames?(): boolean;
+        fileExists?(path: string): boolean;
+        readFile?(path: string): string | undefined;
     }
 
     /** @deprecated See comment on SymbolWriter */
@@ -5310,7 +5323,7 @@ namespace ts {
         reportPrivateInBaseOfClassExpression?(propertyName: string): void;
         reportInaccessibleUniqueSymbolError?(): void;
         /* @internal */
-        moduleResolverHost?: ModuleNameResolverHost;
+        moduleResolverHost?: ModuleSpecifierResolutionHost;
         /* @internal */
         trackReferencedAmbientModule?(decl: ModuleDeclaration): void;
     }
@@ -5464,8 +5477,12 @@ namespace ts {
     }
 
     /* @internal */
-    export interface PragmaDefinition<T1 extends string = string, T2 extends string = string, T3 extends string = string> {
-        args?: [PragmaArgumentSpecification<T1>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>] | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>];
+    export interface PragmaDefinition<T1 extends string = string, T2 extends string = string, T3 extends string = string, T4 extends string = string> {
+        args?:
+            | [PragmaArgumentSpecification<T1>]
+            | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>]
+            | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>]
+            | [PragmaArgumentSpecification<T1>, PragmaArgumentSpecification<T2>, PragmaArgumentSpecification<T3>, PragmaArgumentSpecification<T4>];
         // If not present, defaults to PragmaKindFlags.Default
         kind?: PragmaKindFlags;
     }
@@ -5474,7 +5491,7 @@ namespace ts {
      * This function only exists to cause exact types to be inferred for all the literals within `commentPragmas`
      */
     /* @internal */
-    function _contextuallyTypePragmas<T extends {[name: string]: PragmaDefinition<K1, K2, K3>}, K1 extends string, K2 extends string, K3 extends string>(args: T): T {
+    function _contextuallyTypePragmas<T extends {[name: string]: PragmaDefinition<K1, K2, K3, K4>}, K1 extends string, K2 extends string, K3 extends string, K4 extends string>(args: T): T {
         return args;
     }
 
@@ -5485,6 +5502,7 @@ namespace ts {
         "reference": {
             args: [
                 { name: "types", optional: true, captureSpan: true },
+                { name: "lib", optional: true, captureSpan: true },
                 { name: "path", optional: true, captureSpan: true },
                 { name: "no-default-lib", optional: true }
             ],
@@ -5525,13 +5543,15 @@ namespace ts {
      */
     /* @internal */
     type PragmaArgumentType<T extends PragmaDefinition> =
-        T extends { args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>] }
-        ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3>
-        : T extends { args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>] }
-            ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2>
-            : T extends { args: [PragmaArgumentSpecification<infer TName>] }
-                ? PragmaArgTypeOptional<T["args"][0], TName>
-                : object;
+        T extends { args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>, PragmaArgumentSpecification<infer TName4>] }
+            ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3> & PragmaArgTypeOptional<T["args"][2], TName4>
+            : T extends { args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>, PragmaArgumentSpecification<infer TName3>] }
+                ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2> & PragmaArgTypeOptional<T["args"][2], TName3>
+                : T extends { args: [PragmaArgumentSpecification<infer TName1>, PragmaArgumentSpecification<infer TName2>] }
+                    ? PragmaArgTypeOptional<T["args"][0], TName1> & PragmaArgTypeOptional<T["args"][1], TName2>
+                    : T extends { args: [PragmaArgumentSpecification<infer TName>] }
+                        ? PragmaArgTypeOptional<T["args"][0], TName>
+                        : object;
     // The above fallback to `object` when there's no args to allow `{}` (as intended), but not the number 2, for example
     // TODO: Swap to `undefined` for a cleaner API once strictNullChecks is enabled
 

src/compiler/utilities.ts

@@ -641,11 +641,6 @@ namespace ts {
         return createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2, arg3);
     }
 
-    export function createDiagnosticForNodeSpan(sourceFile: SourceFile, startNode: Node, endNode: Node, message: DiagnosticMessage, arg0?: string | number, arg1?: string | number, arg2?: string | number, arg3?: string | number): DiagnosticWithLocation {
-        const start = skipTrivia(sourceFile.text, startNode.pos);
-        return createFileDiagnostic(sourceFile, start, endNode.end - start, message, arg0, arg1, arg2, arg3);
-    }
-
     export function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): DiagnosticWithLocation {
         const sourceFile = getSourceFileOfNode(node);
         const span = getErrorSpanForNode(sourceFile, node);
@@ -1088,7 +1083,7 @@ namespace ts {
     }
 
     export function getPropertyAssignment(objectLiteral: ObjectLiteralExpression, key: string, key2?: string): ReadonlyArray<PropertyAssignment> {
-        return filter(objectLiteral.properties, (property): property is PropertyAssignment => {
+        return objectLiteral.properties.filter((property): property is PropertyAssignment => {
             if (property.kind === SyntaxKind.PropertyAssignment) {
                 const propName = getTextOfPropertyName(property.name);
                 return key === propName || (!!key2 && key2 === propName);
@@ -1105,12 +1100,15 @@ namespace ts {
     }
 
     export function getTsConfigPropArrayElementValue(tsConfigSourceFile: TsConfigSourceFile | undefined, propKey: string, elementValue: string): StringLiteral | undefined {
+        return firstDefined(getTsConfigPropArray(tsConfigSourceFile, propKey), property =>
+            isArrayLiteralExpression(property.initializer) ?
+                find(property.initializer.elements, (element): element is StringLiteral => isStringLiteral(element) && element.text === elementValue) :
+                undefined);
+    }
+
+    export function getTsConfigPropArray(tsConfigSourceFile: TsConfigSourceFile | undefined, propKey: string): ReadonlyArray<PropertyAssignment> {
         const jsonObjectLiteral = getTsConfigObjectLiteralExpression(tsConfigSourceFile);
-        return jsonObjectLiteral &&
-            firstDefined(getPropertyAssignment(jsonObjectLiteral, propKey), property =>
-                isArrayLiteralExpression(property.initializer) ?
-                    find(property.initializer.elements, (element): element is StringLiteral => isStringLiteral(element) && element.text === elementValue) :
-                    undefined);
+        return jsonObjectLiteral ? getPropertyAssignment(jsonObjectLiteral, propKey) : emptyArray;
     }
 
     export function getContainingFunction(node: Node): SignatureDeclaration | undefined {
@@ -1560,28 +1558,49 @@ namespace ts {
         return getSourceTextOfNodeFromSourceFile(sourceFile, str).charCodeAt(0) === CharacterCodes.doubleQuote;
     }
 
-    /**
-     * Given the symbol of a declaration, find the symbol of its Javascript container-like initializer,
-     * if it has one. Otherwise just return the original symbol.
-     *
-     * Container-like initializer behave like namespaces, so the binder needs to add contained symbols
-     * to their exports. An example is a function with assignments to `this` inside.
-     */
-    export function getJSInitializerSymbol(symbol: Symbol | undefined) {
-        if (!symbol || !symbol.valueDeclaration) {
-            return symbol;
+    export function getDeclarationOfJSInitializer(node: Node): Node | undefined {
+        if (!isInJavaScriptFile(node) || !node.parent) {
+            return undefined;
         }
-        const declaration = symbol.valueDeclaration;
-        const e = getDeclaredJavascriptInitializer(declaration) || getAssignedJavascriptInitializer(declaration);
-        return e && e.symbol ? e.symbol : symbol;
+        let name: Expression | BindingName | undefined;
+        let decl: Node | undefined;
+        if (isVariableDeclaration(node.parent) && node.parent.initializer === node) {
+            name = node.parent.name;
+            decl = node.parent;
+        }
+        else if (isBinaryExpression(node.parent) && node.parent.operatorToken.kind === SyntaxKind.EqualsToken && node.parent.right === node) {
+            name = node.parent.left;
+            decl = name;
+        }
+        else if (isBinaryExpression(node.parent) && node.parent.operatorToken.kind === SyntaxKind.BarBarToken) {
+            if (isVariableDeclaration(node.parent.parent) && node.parent.parent.initializer === node.parent) {
+                name = node.parent.parent.name;
+                decl = node.parent.parent;
+            }
+            else if (isBinaryExpression(node.parent.parent) && node.parent.parent.operatorToken.kind === SyntaxKind.EqualsToken && node.parent.parent.right === node.parent) {
+                name = node.parent.parent.left;
+                decl = name;
+            }
+
+            if (!name || !isEntityNameExpression(name) || !isSameEntityName(name, node.parent.left)) {
+                return undefined;
+            }
+        }
+
+        if (!name || !getJavascriptInitializer(node, isPrototypeAccess(name))) {
+            return undefined;
+        }
+        return decl;
     }
 
-    /** Get the declaration initializer, when the initializer is container-like (See getJavascriptInitializer) */
-    export function getDeclaredJavascriptInitializer(node: Node) {
-        if (node && isVariableDeclaration(node) && node.initializer) {
-            return getJavascriptInitializer(node.initializer, /*isPrototypeAssignment*/ false) ||
-                isIdentifier(node.name) && getDefaultedJavascriptInitializer(node.name, node.initializer, /*isPrototypeAssignment*/ false);
+    /** Get the initializer, taking into account defaulted Javascript initializers */
+    export function getEffectiveInitializer(node: HasExpressionInitializer) {
+        if (isInJavaScriptFile(node) && node.initializer &&
+            isBinaryExpression(node.initializer) && node.initializer.operatorToken.kind === SyntaxKind.BarBarToken &&
+            node.name && isEntityNameExpression(node.name) && isSameEntityName(node.name, node.initializer.left)) {
+            return node.initializer.right;
         }
+        return node.initializer;
     }
 
     /**
@@ -1636,6 +1655,13 @@ namespace ts {
         }
     }
 
+    export function isDefaultedJavascriptInitializer(node: BinaryExpression) {
+        const name = isVariableDeclaration(node.parent) ? node.parent.name :
+            isBinaryExpression(node.parent) && node.parent.operatorToken.kind === SyntaxKind.EqualsToken ? node.parent.left :
+            undefined;
+        return name && getJavascriptInitializer(node.right, isPrototypeAccess(name)) && isEntityNameExpression(name) && isSameEntityName(name, node.left);
+    }
+
     /** Given a Javascript initializer, return the outer name. That is, the lhs of the assignment or the declaration name. */
     export function getOuterNameOfJsInitializer(node: Declaration): DeclarationName | undefined {
         if (isBinaryExpression(node.parent)) {
@@ -1658,7 +1684,7 @@ namespace ts {
      * var min = window.min || {}
      * my.app = self.my.app || class { }
      */
-    function isSameEntityName(name: EntityNameExpression, initializer: EntityNameExpression): boolean {
+    function isSameEntityName(name: Expression, initializer: Expression): boolean {
         if (isIdentifier(name) && isIdentifier(initializer)) {
             return name.escapedText === initializer.escapedText;
         }
@@ -2916,11 +2942,11 @@ namespace ts {
         };
     }
 
-    export function getResolvedExternalModuleName(host: ModuleNameResolverHost, file: SourceFile, referenceFile?: SourceFile): string {
+    export function getResolvedExternalModuleName(host: EmitHost, file: SourceFile, referenceFile?: SourceFile): string {
         return file.moduleName || getExternalModuleNameFromPath(host, file.fileName, referenceFile && referenceFile.fileName);
     }
 
-    export function getExternalModuleNameFromDeclaration(host: ModuleNameResolverHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration | ImportTypeNode): string | undefined {
+    export function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration | ImportTypeNode): string | undefined {
         const file = resolver.getExternalModuleFileFromDeclaration(declaration);
         if (!file || file.isDeclarationFile) {
             return undefined;
@@ -2931,7 +2957,7 @@ namespace ts {
     /**
      * Resolves a local path to a path which is absolute to the base of the emit
      */
-    export function getExternalModuleNameFromPath(host: ModuleNameResolverHost, fileName: string, referencePath?: string): string {
+    export function getExternalModuleNameFromPath(host: EmitHost, fileName: string, referencePath?: string): string {
         const getCanonicalFileName = (f: string) => host.getCanonicalFileName(f);
         const dir = toPath(referencePath ? getDirectoryPath(referencePath) : host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
         const filePath = getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
@@ -3146,21 +3172,18 @@ namespace ts {
         }
         if (isJSDocTypeAlias(node)) {
             Debug.assert(node.parent.kind === SyntaxKind.JSDocComment);
-            const templateTags = flatMap(filter(node.parent.tags, isJSDocTemplateTag), tag => tag.typeParameters) as ReadonlyArray<TypeParameterDeclaration>;
-            const templateTagNodes = templateTags as NodeArray<TypeParameterDeclaration>;
-            templateTagNodes.pos = templateTagNodes.length > 0 ? first(templateTagNodes).pos : node.pos;
-            templateTagNodes.end = templateTagNodes.length > 0 ? last(templateTagNodes).end : node.end;
-            templateTagNodes.hasTrailingComma = false;
-            return templateTagNodes;
+            return flatMap(node.parent.tags, tag => isJSDocTemplateTag(tag) ? tag.typeParameters : undefined) as ReadonlyArray<TypeParameterDeclaration>;
         }
         return node.typeParameters || (isInJavaScriptFile(node) ? getJSDocTypeParameterDeclarations(node) : emptyArray);
     }
 
     export function getJSDocTypeParameterDeclarations(node: DeclarationWithTypeParameters): ReadonlyArray<TypeParameterDeclaration> {
-        // template tags are only available when a typedef isn't already using them
-        const tag = find(getJSDocTags(node), (tag): tag is JSDocTemplateTag =>
-            isJSDocTemplateTag(tag) && !(tag.parent.kind === SyntaxKind.JSDocComment && tag.parent.tags!.some(isJSDocTypeAlias)));
-        return (tag && tag.typeParameters) || emptyArray;
+        return flatMap(getJSDocTags(node), tag => isNonTypeAliasTemplate(tag) ? tag.typeParameters : undefined);
+    }
+
+    /** template tags are only available when a typedef isn't already using them */
+    function isNonTypeAliasTemplate(tag: JSDocTag): tag is JSDocTemplateTag {
+        return isJSDocTemplateTag(tag) && !(tag.parent.kind === SyntaxKind.JSDocComment && tag.parent.tags!.some(isJSDocTypeAlias));
     }
 
     /**
@@ -3656,15 +3679,15 @@ namespace ts {
         return output;
     }
 
-    export function base64encode(host: { base64encode?(input: string): string }, input: string): string {
-        if (host.base64encode) {
+    export function base64encode(host: { base64encode?(input: string): string } | undefined, input: string): string {
+        if (host && host.base64encode) {
             return host.base64encode(input);
         }
         return convertToBase64(input);
     }
 
-    export function base64decode(host: { base64decode?(input: string): string }, input: string): string {
-        if (host.base64decode) {
+    export function base64decode(host: { base64decode?(input: string): string } | undefined, input: string): string {
+        if (host && host.base64decode) {
             return host.base64decode(input);
         }
         const length = input.length;

src/compiler/visitor.ts

@@ -1468,7 +1468,7 @@ namespace ts {
         }
 
         return isNodeArray(statements)
-            ? setTextRange(createNodeArray(concatenate(declarations, statements)), statements)
+            ? setTextRange(createNodeArray(prependStatements(statements.slice(), declarations)), statements)
             : prependStatements(statements, declarations);
     }
 

src/harness/compiler.ts

@@ -183,7 +183,7 @@ namespace compiler {
 
         public getSourceMapRecord(): string | undefined {
             if (this.result!.sourceMaps && this.result!.sourceMaps!.length > 0) {
-                return Harness.SourceMapRecorder.getSourceMapRecord(this.result!.sourceMaps!, this.program!, Array.from(this.js.values()), Array.from(this.dts.values()));
+                return Harness.SourceMapRecorder.getSourceMapRecord(this.result!.sourceMaps!, this.program!, Array.from(this.js.values()).filter(d => !ts.fileExtensionIs(d.file, ts.Extension.Json)), Array.from(this.dts.values()));
             }
         }
 
@@ -216,6 +216,16 @@ namespace compiler {
             }
             return vpath.changeExtension(path, ext);
         }
+
+        public getNumberOfJsFiles() {
+            let count = this.js.size;
+            this.js.forEach(document => {
+                if (ts.fileExtensionIs(document.file, ts.Extension.Json)) {
+                    count--;
+                }
+            });
+            return count;
+        }
     }
 
     export function compileFiles(host: fakes.CompilerHost, rootFiles: string[] | undefined, compilerOptions: ts.CompilerOptions): CompilationResult {

src/harness/fourslash.ts

@@ -1090,7 +1090,7 @@ namespace FourSlash {
         }
 
         private getNode(): ts.Node {
-            return ts.getTouchingPropertyName(this.getSourceFile(), this.currentCaretPosition, /*includeJsDocComment*/ false);
+            return ts.getTouchingPropertyName(this.getSourceFile(), this.currentCaretPosition);
         }
 
         private goToAndGetNode(range: Range): ts.Node {
@@ -2743,6 +2743,14 @@ Actual: ${stringify(fullActual)}`);
             }
         }
 
+        public verifyJsxClosingTag(map: { [markerName: string]: ts.JsxClosingTagInfo | undefined }): void {
+            for (const markerName in map) {
+                this.goToMarker(markerName);
+                const actual = this.languageService.getJsxClosingTagAtPosition(this.activeFile.fileName, this.currentCaretPosition);
+                assert.deepEqual(actual, map[markerName]);
+            }
+        }
+
         public verifyMatchingBracePosition(bracePosition: number, expectedMatchPosition: number) {
             const actual = this.languageService.getBraceMatchingAtPosition(this.activeFile.fileName, bracePosition);
 
@@ -3131,8 +3139,12 @@ Actual: ${stringify(fullActual)}`);
             assert(action.name === "Move to a new file" && action.description === "Move to a new file");
 
             const editInfo = this.languageService.getEditsForRefactor(this.activeFile.fileName, this.formatCodeSettings, range, refactor.name, action.name, options.preferences || ts.defaultPreferences)!;
-            for (const edit of editInfo.edits) {
-                const newContent = options.newFileContents[edit.fileName];
+            this.testNewFileContents(editInfo.edits, options.newFileContents);
+        }
+
+        private testNewFileContents(edits: ReadonlyArray<ts.FileTextChanges>, newFileContents: { [fileName: string]: string }): void {
+            for (const edit of edits) {
+                const newContent = newFileContents[edit.fileName];
                 if (newContent === undefined) {
                     this.raiseError(`There was an edit in ${edit.fileName} but new content was not specified.`);
                 }
@@ -3149,8 +3161,8 @@ Actual: ${stringify(fullActual)}`);
                 }
             }
 
-            for (const fileName in options.newFileContents) {
-                assert(editInfo.edits.some(e => e.fileName === fileName));
+            for (const fileName in newFileContents) {
+                assert(edits.some(e => e.fileName === fileName));
             }
         }
 
@@ -3360,12 +3372,8 @@ Actual: ${stringify(fullActual)}`);
         }
 
         public getEditsForFileRename(options: FourSlashInterface.GetEditsForFileRenameOptions): void {
-            const changes = this.languageService.getEditsForFileRename(options.oldPath, options.newPath, this.formatCodeSettings);
-            this.applyChanges(changes);
-            for (const fileName in options.newFileContents) {
-                this.openFile(fileName);
-                this.verifyCurrentFileContent(options.newFileContents[fileName]);
-            }
+            const changes = this.languageService.getEditsForFileRename(options.oldPath, options.newPath, this.formatCodeSettings, ts.defaultPreferences);
+            this.testNewFileContents(changes, options.newFileContents);
         }
 
         private getApplicableRefactors(positionOrRange: number | ts.TextRange, preferences = ts.defaultPreferences): ReadonlyArray<ts.ApplicableRefactorInfo> {
@@ -4079,6 +4087,10 @@ namespace FourSlashInterface {
             this.state.verifyBraceCompletionAtPosition(this.negative, openingBrace);
         }
 
+        public jsxClosingTag(map: { [markerName: string]: ts.JsxClosingTagInfo | undefined }): void {
+            this.state.verifyJsxClosingTag(map);
+        }
+
         public isInCommentAtPosition(onlyMultiLineDiverges?: boolean) {
             this.state.verifySpanOfEnclosingComment(this.negative, onlyMultiLineDiverges);
         }

src/harness/harness.ts

@@ -1270,7 +1270,7 @@ namespace Harness {
                         throw new Error("Only declaration files should be generated when emitDeclarationOnly:true");
                     }
                 }
-                else if (result.dts.size !== result.js.size) {
+                else if (result.dts.size !== result.getNumberOfJsFiles()) {
                     throw new Error("There were no errors and declFiles generated did not match number of js files generated");
                 }
             }
@@ -1645,7 +1645,7 @@ namespace Harness {
                 return;
             }
             else if (options.sourceMap || declMaps) {
-                if (result.maps.size !== (result.js.size * (declMaps && options.sourceMap ? 2 : 1))) {
+                if (result.maps.size !== (result.getNumberOfJsFiles() * (declMaps && options.sourceMap ? 2 : 1))) {
                     throw new Error("Number of sourcemap files should be same as js files.");
                 }
 

src/harness/harnessLanguageService.ts

@@ -509,6 +509,9 @@ namespace Harness.LanguageService {
         isValidBraceCompletionAtPosition(fileName: string, position: number, openingBrace: number): boolean {
             return unwrapJSONCallResult(this.shim.isValidBraceCompletionAtPosition(fileName, position, openingBrace));
         }
+        getJsxClosingTagAtPosition(): never {
+            throw new Error("Not supported on the shim.");
+        }
         getSpanOfEnclosingComment(fileName: string, position: number, onlyMultiLine: boolean): ts.TextSpan {
             return unwrapJSONCallResult(this.shim.getSpanOfEnclosingComment(fileName, position, onlyMultiLine));
         }
@@ -573,7 +576,8 @@ namespace Harness.LanguageService {
                 importedFiles: [],
                 ambientExternalModules: [],
                 isLibFile: shimResult.isLibFile,
-                typeReferenceDirectives: []
+                typeReferenceDirectives: [],
+                libReferenceDirectives: []
             };
 
             ts.forEach(shimResult.referencedFiles, refFile => {
@@ -794,7 +798,7 @@ namespace Harness.LanguageService {
                                 const proxy = makeDefaultProxy(info);
                                 proxy.getSemanticDiagnostics = filename => {
                                     const prev = info.languageService.getSemanticDiagnostics(filename);
-                                    const sourceFile: ts.SourceFile = info.languageService.getSourceFile(filename);
+                                    const sourceFile: ts.SourceFile = info.project.getSourceFile(ts.toPath(filename, /*basePath*/ undefined, ts.createGetCanonicalFileName(info.serverHost.useCaseSensitiveFileNames)))!;
                                     prev.push({
                                         category: ts.DiagnosticCategory.Warning,
                                         file: sourceFile,

src/harness/tsconfig.json

@@ -51,6 +51,7 @@
         "../compiler/builderState.ts",
         "../compiler/builder.ts",
         "../compiler/resolutionCache.ts",
+        "../compiler/moduleSpecifiers.ts",
         "../compiler/watch.ts",
         "../compiler/tsbuild.ts",
         "../compiler/commandLineParser.ts",
@@ -116,7 +117,6 @@
         "../services/codefixes/inferFromUsage.ts",
         "../services/codefixes/fixInvalidImportSyntax.ts",
         "../services/codefixes/fixStrictClassInitialization.ts",
-        "../services/codefixes/moduleSpecifiers.ts",
         "../services/codefixes/requireInTs.ts",
         "../services/codefixes/useDefaultImport.ts",
         "../services/codefixes/fixAddModuleReferTypeMissingTypeof.ts",

src/harness/unittests/cancellableLanguageServiceOperations.ts

@@ -56,9 +56,19 @@ namespace ts {
                 r => assert.exists(r.displayParts)
             );
         });
+
+        it("can cancel suggestion diagnostics mid-request", () => {
+            verifyOperationCancelledAfter(file, 1, service => // The LS doesn't do any top-level checks on the token for suggestion diagnostics, so the first check is within the checker
+                service.getSuggestionDiagnostics("file.js"),
+                r => assert.notEqual(r.length, 0),
+                "file.js",
+                "function foo() { let a = 10; }",
+                { allowJs: true }
+            );
+        });
     });
 
-    function verifyOperationCancelledAfter<T>(content: string, cancelAfter: number, operation: (service: LanguageService) => T, validator: (arg: T) => void) {
+    function verifyOperationCancelledAfter<T>(content: string, cancelAfter: number, operation: (service: LanguageService) => T, validator: (arg: T) => void, fileName?: string, fileContent?: string, options?: CompilerOptions) {
         let checks = 0;
         const token: HostCancellationToken = {
             isCancellationRequested() {
@@ -70,9 +80,9 @@ namespace ts {
                 return result;
             }
         };
-        const adapter = new Harness.LanguageService.NativeLanguageServiceAdapter(token);
+        const adapter = new Harness.LanguageService.NativeLanguageServiceAdapter(token, options);
         const host = adapter.getHost();
-        host.addScript("file.ts", content, /*isRootFile*/ true);
+        host.addScript(fileName || "file.ts", fileContent || content, /*isRootFile*/ true);
         const service = adapter.getLanguageService();
         assertCancelled(() => operation(service));
         validator(operation(service));
@@ -92,4 +102,4 @@ namespace ts {
         assert.exists(caught, "Expected operation to be cancelled, but was not");
         assert.instanceOf(caught, OperationCanceledException);
     }
-}
+}

src/harness/unittests/commandLineParsing.ts

@@ -60,7 +60,7 @@ namespace ts {
             assertParseResult(["--lib", "es5,invalidOption", "0.ts"],
                 {
                     errors: [{
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         file: undefined,
@@ -262,7 +262,7 @@ namespace ts {
             assertParseResult(["--lib", "es5,", "es7", "0.ts"],
                 {
                     errors: [{
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         file: undefined,
@@ -281,7 +281,7 @@ namespace ts {
             assertParseResult(["--lib", "es5, ", "es7", "0.ts"],
                 {
                     errors: [{
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         file: undefined,

src/harness/unittests/convertCompilerOptionsFromJson.ts

@@ -268,7 +268,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]
@@ -299,7 +299,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]
@@ -330,7 +330,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]
@@ -361,7 +361,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.asynciterable'.",
+                        messageText: "Argument for '--lib' option must be: 'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'es2018', 'esnext', 'dom', 'dom.iterable', 'webworker', 'webworker.importscripts', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory', 'es2017.string', 'es2017.intl', 'es2017.typedarrays', 'es2018.intl', 'es2018.promise', 'es2018.regexp', 'esnext.array', 'esnext.symbol', 'esnext.asynciterable'.",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]

src/harness/unittests/evaluation/forAwaitOf.ts

@@ -9,7 +9,7 @@ describe("forAwaitOfEvaluation", () => {
                     case 0: return { value: 1, done: false };
                     case 1: return { value: Promise.resolve(2), done: false };
                     case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
-                    default: return { value: undefined: done: true };
+                    default: return { value: undefined, done: true };
                 }
             }
         };
@@ -35,7 +35,7 @@ describe("forAwaitOfEvaluation", () => {
                     case 0: return { value: 1, done: false };
                     case 1: return { value: Promise.resolve(2), done: false };
                     case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
-                    default: return { value: undefined: done: true };
+                    default: return { value: undefined, done: true };
                 }
             }
         };
@@ -61,7 +61,7 @@ describe("forAwaitOfEvaluation", () => {
                     case 0: return { value: 1, done: false };
                     case 1: return { value: Promise.resolve(2), done: false };
                     case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
-                    default: return { value: undefined: done: true };
+                    default: return { value: undefined, done: true };
                 }
             }
         };
@@ -87,7 +87,7 @@ describe("forAwaitOfEvaluation", () => {
                     case 0: return { value: 1, done: false };
                     case 1: return { value: Promise.resolve(2), done: false };
                     case 2: return { value: new Promise<number>(resolve => setTimeout(resolve, 100, 3)), done: false };
-                    default: return { value: undefined: done: true };
+                    default: return { value: undefined, done: true };
                 }
             }
         };
@@ -102,4 +102,4 @@ describe("forAwaitOfEvaluation", () => {
         assert.instanceOf(result.output[1], Promise);
         assert.instanceOf(result.output[2], Promise);
     });
-});
+});

src/harness/unittests/services/preProcessFile.ts

@@ -9,6 +9,7 @@ describe("PreProcessFile:", () => {
         checkFileReferenceList("Imported files", expectedPreProcess.importedFiles, resultPreProcess.importedFiles);
         checkFileReferenceList("Referenced files", expectedPreProcess.referencedFiles, resultPreProcess.referencedFiles);
         checkFileReferenceList("Type reference directives", expectedPreProcess.typeReferenceDirectives, resultPreProcess.typeReferenceDirectives);
+        checkFileReferenceList("Lib reference directives", expectedPreProcess.libReferenceDirectives, resultPreProcess.libReferenceDirectives);
 
         assert.deepEqual(resultPreProcess.ambientExternalModules, expectedPreProcess.ambientExternalModules);
     }
@@ -41,6 +42,7 @@ describe("PreProcessFile:", () => {
                         { fileName: "refFile3.ts", pos: 94, end: 105 }, { fileName: "..\\refFile4d.ts", pos: 131, end: 146 }],
                     importedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     ambientExternalModules: undefined,
                     isLibFile: false
                 });
@@ -54,6 +56,7 @@ describe("PreProcessFile:", () => {
                     referencedFiles: <ts.FileReference[]>[],
                     importedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     ambientExternalModules: undefined,
                     isLibFile: false
                 });
@@ -67,6 +70,7 @@ describe("PreProcessFile:", () => {
                     referencedFiles: <ts.FileReference[]>[],
                     importedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     ambientExternalModules: undefined,
                     isLibFile: false
                 });
@@ -80,6 +84,7 @@ describe("PreProcessFile:", () => {
                     referencedFiles: <ts.FileReference[]>[],
                     importedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     ambientExternalModules: undefined,
                     isLibFile: false
                 });
@@ -92,6 +97,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [{ fileName: "r1.ts", pos: 20, end: 25 }, { fileName: "r2.ts", pos: 49, end: 54 }, { fileName: "r3.ts", pos: 78, end: 83 },
                         { fileName: "r4.ts", pos: 106, end: 111 }, { fileName: "r5.ts", pos: 138, end: 143 }],
                     ambientExternalModules: undefined,
@@ -106,6 +112,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: <ts.FileReference[]>[],
                     ambientExternalModules: undefined,
                     isLibFile: false
@@ -119,6 +126,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [{ fileName: "r3.ts", pos: 73, end: 78 }],
                     ambientExternalModules: undefined,
                     isLibFile: false
@@ -132,6 +140,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [{ fileName: "refFile1.ts", pos: 20, end: 31 }, { fileName: "refFile2.ts", pos: 57, end: 68 }],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [{ fileName: "r1.ts", pos: 92, end: 97 }, { fileName: "r2.ts", pos: 121, end: 126 }],
                     ambientExternalModules: undefined,
                     isLibFile: false
@@ -145,6 +154,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [{ fileName: "refFile1.ts", pos: 20, end: 31 }],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [{ fileName: "r1.ts", pos: 91, end: 96 }, { fileName: "r3.ts", pos: 148, end: 153 }],
                     ambientExternalModules: undefined,
                     isLibFile: false
@@ -164,6 +174,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [
                         { fileName: "m1", pos: 20, end: 22 },
                         { fileName: "m2", pos: 51, end: 53 },
@@ -188,6 +199,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [
                         { fileName: "m1", pos: 14, end: 16 },
                         { fileName: "m2", pos: 36, end: 38 },
@@ -212,6 +224,7 @@ describe("PreProcessFile:", () => {
                {
                    referencedFiles: [],
                    typeReferenceDirectives: [],
+                   libReferenceDirectives: [],
                    importedFiles: [],
                    ambientExternalModules: ["B"],
                    isLibFile: false
@@ -225,6 +238,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [
                         { fileName: "m1", pos: 26, end: 28 }
                     ],
@@ -244,6 +258,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [
                         { fileName: "m1", pos: 39, end: 41 },
                         { fileName: "m2", pos: 74, end: 76 },
@@ -264,6 +279,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [
                         { fileName: "mod1", pos: 21, end: 25 },
                         { fileName: "mod2", pos: 29, end: 33 },
@@ -282,6 +298,7 @@ describe("PreProcessFile:", () => {
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
+                    libReferenceDirectives: [],
                     importedFiles: [
                         { fileName: "mod1", pos: 28, end: 32 },
                         { fileName: "mod2", pos: 36, end: 40 },
@@ -303,6 +320,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "../Observable", pos: 28, end: 41 }
                 ],
@@ -323,6 +341,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "m", pos: 123, end: 124 },
                     { fileName: "../Observable", pos: 28, end: 41 }
@@ -344,6 +363,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "m", pos: 123, end: 124 },
                     { fileName: "../Observable", pos: 28, end: 41 }
@@ -365,6 +385,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "../Observable", pos: 28, end: 41 }
                 ],
@@ -385,6 +406,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "../Observable", pos: 28, end: 41 }
                 ],
@@ -404,6 +426,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "../Observable", pos: 28, end: 41 }
                 ],
@@ -425,6 +448,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "m2", pos: 65, end: 67 },
                     { fileName: "augmentation", pos: 102, end: 114 }
@@ -449,6 +473,7 @@ describe("PreProcessFile:", () => {
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
+                libReferenceDirectives: [],
                 importedFiles: [
                     { fileName: "m2", pos: 127, end: 129 },
                     { fileName: "augmentation", pos: 164, end: 176 }
@@ -475,6 +500,32 @@ describe("PreProcessFile:", () => {
                     { pos: 73, end: 75, fileName: "a1" },
                     { pos: 152, end: 154, fileName: "a3" }
                 ],
+                libReferenceDirectives: [],
+                importedFiles: [],
+                ambientExternalModules: undefined,
+                isLibFile: false
+            });
+        });
+        it ("correctly recognizes lib reference directives", () => {
+            test(`
+            /// <reference path="a"/>
+            /// <reference lib="a1"/>
+            /// <reference path="a2"/>
+            /// <reference lib="a3"/>
+            `,
+            /*readImportFile*/ true,
+            /*detectJavaScriptImports*/ false,
+            {
+                referencedFiles: [
+                    { pos: 34, end: 35, fileName: "a" },
+                    { pos: 110, end: 112, fileName: "a2" }
+                ],
+                typeReferenceDirectives: [
+                ],
+                libReferenceDirectives: [
+                    { pos: 71, end: 73, fileName: "a1" },
+                    { pos: 148, end: 150, fileName: "a3" }
+                ],
                 importedFiles: [],
                 ambientExternalModules: undefined,
                 isLibFile: false

src/harness/unittests/session.ts

@@ -224,6 +224,7 @@ namespace ts.server {
                 CommandNames.Occurrences,
                 CommandNames.DocumentHighlights,
                 CommandNames.DocumentHighlightsFull,
+                CommandNames.JsxClosingTag,
                 CommandNames.Open,
                 CommandNames.Quickinfo,
                 CommandNames.QuickinfoFull,

src/harness/unittests/transform.ts

@@ -267,7 +267,7 @@ namespace ts {
             const fs = vfs.createFromFileSystem(Harness.IO, /*caseSensitive*/ true, { documents: [new documents.TextDocument("/.src/index.ts", text)] });
             const host = new fakes.CompilerHost(fs, opts.compilerOptions);
             const program = createProgram(["/.src/index.ts"], opts.compilerOptions!, host);
-            program.emit(program.getSourceFiles()[1], (p, s, bom) => host.writeFile(p, s, bom), /*cancellationToken*/ undefined, /*onlyDts*/ true, opts.transformers);
+            program.emit(program.getSourceFile("/.src/index.ts"), (p, s, bom) => host.writeFile(p, s, bom), /*cancellationToken*/ undefined, /*onlyDts*/ true, opts.transformers);
             return fs.readFileSync("/.src/index.d.ts").toString();
         }
 

src/harness/unittests/tsserverProjectSystem.ts

@@ -8400,15 +8400,23 @@ new C();`
                 path: "/user.ts",
                 content: 'import { x } from "./old";',
             };
+            const newTs: File = {
+                path: "/new.ts",
+                content: "export const x = 0;",
+            };
+            const tsconfig: File = {
+                path: "/tsconfig.json",
+                content: "{}",
+            };
 
-            const host = createServerHost([userTs]);
+            const host = createServerHost([userTs, newTs, tsconfig]);
             const projectService = createProjectService(host);
             projectService.openClientFile(userTs.path);
-            const project = first(projectService.inferredProjects);
+            const project = projectService.configuredProjects.get(tsconfig.path)!;
 
             Debug.assert(!!project.resolveModuleNames);
 
-            const edits = project.getLanguageService().getEditsForFileRename("/old.ts", "/new.ts", testFormatOptions);
+            const edits = project.getLanguageService().getEditsForFileRename("/old.ts", "/new.ts", testFormatOptions, defaultPreferences);
             assert.deepEqual<ReadonlyArray<FileTextChanges>>(edits, [{
                 fileName: "/user.ts",
                 textChanges: [{

src/harness/unittests/typingsInstaller.ts

@@ -1340,6 +1340,27 @@ namespace ts.projectSystem {
             assert.deepEqual(result.newTypingNames, ["bar"]);
         });
 
+        it("should gracefully handle packages that have been removed from the types-registry", () => {
+            const f = {
+                path: "/a/b/app.js",
+                content: ""
+            };
+            const node = {
+                path: "/a/b/node.d.ts",
+                content: ""
+            };
+            const host = createServerHost([f, node]);
+            const cache = createMapFromTemplate<JsTyping.CachedTyping>({ node: { typingLocation: node.path, version: Semver.parse("1.3.0") } });
+            const logger = trackingLogger();
+            const result = JsTyping.discoverTypings(host, logger.log, [f.path], getDirectoryPath(<Path>f.path), emptySafeList, cache, { enable: true }, ["fs", "bar"], emptyMap);
+            assert.deepEqual(logger.finish(), [
+                'Inferred typings from unresolved imports: ["node","bar"]',
+                'Result: {"cachedTypingPaths":[],"newTypingNames":["node","bar"],"filesToWatch":["/a/b/bower_components","/a/b/node_modules"]}',
+            ]);
+            assert.deepEqual(result.cachedTypingPaths, []);
+            assert.deepEqual(result.newTypingNames, ["node", "bar"]);
+        });
+
         it("should search only 2 levels deep", () => {
             const app = {
                 path: "/app.js",

src/lib/dom.iterable.d.ts

@@ -1,4 +1,4 @@
-/// <reference path="lib.dom.d.ts" />
+/// <reference lib="dom" />
 
 interface DOMTokenList {
     [Symbol.iterator](): IterableIterator<string>;

src/lib/dom.iterable.generated.d.ts

@@ -0,0 +1,188 @@
+/////////////////////////////
+/// DOM Iterable APIs
+/////////////////////////////
+
+interface AudioParamMap extends ReadonlyMap<string, AudioParam> {
+}
+
+interface AudioTrackList {
+    [Symbol.iterator](): IterableIterator<AudioTrack>;
+}
+
+interface CSSRuleList {
+    [Symbol.iterator](): IterableIterator<CSSRule>;
+}
+
+interface CSSStyleDeclaration {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface ClientRectList {
+    [Symbol.iterator](): IterableIterator<ClientRect>;
+}
+
+interface DOMRectList {
+    [Symbol.iterator](): IterableIterator<DOMRect>;
+}
+
+interface DOMStringList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface DOMTokenList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface DataTransferItemList {
+    [Symbol.iterator](): IterableIterator<File>;
+}
+
+interface FileList {
+    [Symbol.iterator](): IterableIterator<File>;
+}
+
+interface FormData {
+    [Symbol.iterator](): IterableIterator<[string, FormDataEntryValue]>;
+    /**
+     * Returns an array of key, value pairs for every entry in the list.
+     */
+    entries(): IterableIterator<[string, FormDataEntryValue]>;
+    /**
+     * Returns a list of keys in the list.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the list.
+     */
+    values(): IterableIterator<FormDataEntryValue>;
+}
+
+interface HTMLAllCollection {
+    [Symbol.iterator](): IterableIterator<Element>;
+}
+
+interface HTMLCollectionBase {
+    [Symbol.iterator](): IterableIterator<Element>;
+}
+
+interface HTMLCollectionOf<T extends Element> {
+    [Symbol.iterator](): IterableIterator<T>;
+    entries(): IterableIterator<[number, T]>;
+    keys(): IterableIterator<number>;
+    values(): IterableIterator<T>;
+}
+
+interface HTMLSelectElement {
+    [Symbol.iterator](): IterableIterator<Element>;
+}
+
+interface Headers {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all key/value pairs contained in this object.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns an iterator allowing to go through all keys of the key/value pairs contained in this object.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns an iterator allowing to go through all values of the key/value pairs contained in this object.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface MediaList {
+    [Symbol.iterator](): IterableIterator<string>;
+}
+
+interface MimeTypeArray {
+    [Symbol.iterator](): IterableIterator<Plugin>;
+}
+
+interface NamedNodeMap {
+    [Symbol.iterator](): IterableIterator<Attr>;
+}
+
+interface NodeList {
+    [Symbol.iterator](): IterableIterator<Node>;
+    /**
+     * Returns an array of key, value pairs for every entry in the list.
+     */
+    entries(): IterableIterator<[number, Node]>;
+    /**
+     * Returns an list of keys in the list.
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list.
+     */
+    values(): IterableIterator<Node>;
+}
+
+interface NodeListOf<TNode extends Node> {
+    [Symbol.iterator](): IterableIterator<TNode>;
+    /**
+     * Returns an array of key, value pairs for every entry in the list.
+     */
+    entries(): IterableIterator<[number, TNode]>;
+    /**
+     * Returns an list of keys in the list.
+     */
+    keys(): IterableIterator<number>;
+    /**
+     * Returns an list of values in the list.
+     */
+    values(): IterableIterator<TNode>;
+}
+
+interface Plugin {
+    [Symbol.iterator](): IterableIterator<MimeType>;
+}
+
+interface PluginArray {
+    [Symbol.iterator](): IterableIterator<Plugin>;
+}
+
+interface RTCStatsReport extends ReadonlyMap<string, any> {
+}
+
+interface SourceBufferList {
+    [Symbol.iterator](): IterableIterator<SourceBuffer>;
+}
+
+interface StyleSheetList {
+    [Symbol.iterator](): IterableIterator<StyleSheet>;
+}
+
+interface TextTrackCueList {
+    [Symbol.iterator](): IterableIterator<TextTrackCue>;
+}
+
+interface TextTrackList {
+    [Symbol.iterator](): IterableIterator<TextTrack>;
+}
+
+interface TouchList {
+    [Symbol.iterator](): IterableIterator<Touch>;
+}
+
+interface URLSearchParams {
+    [Symbol.iterator](): IterableIterator<[string, string]>;
+    /**
+     * Returns an array of key, value pairs for every entry in the search params.
+     */
+    entries(): IterableIterator<[string, string]>;
+    /**
+     * Returns a list of keys in the search params.
+     */
+    keys(): IterableIterator<string>;
+    /**
+     * Returns a list of values in the search params.
+     */
+    values(): IterableIterator<string>;
+}
+
+interface VideoTrackList {
+    [Symbol.iterator](): IterableIterator<VideoTrack>;
+}

src/lib/es2015.d.ts

@@ -1,10 +1,10 @@
-/// <reference path="lib.es2015.core.d.ts" />
-/// <reference path="lib.es2015.collection.d.ts" />
-/// <reference path="lib.es2015.generator.d.ts" />
-/// <reference path="lib.es2015.promise.d.ts" />
-/// <reference path="lib.es2015.iterable.d.ts" />
-/// <reference path="lib.es2015.proxy.d.ts" />
-/// <reference path="lib.es2015.reflect.d.ts" />
-/// <reference path="lib.es2015.symbol.d.ts" />
-/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
-/// <reference path="lib.es5.d.ts" />
+/// <reference lib="es5" />
+/// <reference lib="es2015.core" />
+/// <reference lib="es2015.collection" />
+/// <reference lib="es2015.generator" />
+/// <reference lib="es2015.promise" />
+/// <reference lib="es2015.iterable" />
+/// <reference lib="es2015.proxy" />
+/// <reference lib="es2015.reflect" />
+/// <reference lib="es2015.symbol" />
+/// <reference lib="es2015.symbol.wellknown" />

src/lib/es2015.full.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="es2015" />
+/// <reference lib="dom" />
+/// <reference lib="dom.iterable" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />

src/lib/es2015.iterable.d.ts

@@ -1,4 +1,4 @@
-/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference lib="es2015.symbol" />
 
 interface SymbolConstructor {
     /**

src/lib/es2015.symbol.wellknown.d.ts

@@ -1,4 +1,4 @@
-/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference lib="es2015.symbol" />
 
 interface SymbolConstructor {
     /**

src/lib/es2016.d.ts

@@ -1,2 +1,2 @@
-/// <reference path="lib.es2015.d.ts" />
-/// <reference path="lib.es2016.array.include.d.ts" />
+/// <reference lib="es2015" />
+/// <reference lib="es2016.array.include" />

src/lib/es2016.full.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="es2016" />
+/// <reference lib="dom" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />
+/// <reference lib="dom.iterable" />

src/lib/es2017.d.ts

@@ -1,6 +1,6 @@
-/// <reference path="lib.es2016.d.ts" />
-/// <reference path="lib.es2017.object.d.ts" />
-/// <reference path="lib.es2017.sharedmemory.d.ts" />
-/// <reference path="lib.es2017.string.d.ts" />
-/// <reference path="lib.es2017.intl.d.ts" />
-/// <reference path="lib.es2017.typedarrays.d.ts" />
+/// <reference lib="es2016" />
+/// <reference lib="es2017.object" />
+/// <reference lib="es2017.sharedmemory" />
+/// <reference lib="es2017.string" />
+/// <reference lib="es2017.intl" />
+/// <reference lib="es2017.typedarrays" />

src/lib/es2017.full.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="es2017" />
+/// <reference lib="dom" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />
+/// <reference lib="dom.iterable" />

src/lib/es2017.sharedmemory.d.ts

@@ -1,5 +1,5 @@
-/// <reference path="lib.es2015.symbol.d.ts" />
-/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
+/// <reference lib="es2015.symbol" />
+/// <reference lib="es2015.symbol.wellknown" />
 
 interface SharedArrayBuffer {
     /**

src/lib/es2018.d.ts

@@ -1,4 +1,4 @@
-/// <reference path="lib.es2017.d.ts" />
-/// <reference path="lib.es2018.promise.d.ts" />
-/// <reference path="lib.es2018.regexp.d.ts" />
-/// <reference path="lib.es2018.intl.d.ts" />
+/// <reference lib="es2017" />
+/// <reference lib="es2018.promise" />
+/// <reference lib="es2018.regexp" />
+/// <reference lib="es2018.intl" />

src/lib/es2018.full.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="es2018" />
+/// <reference lib="dom" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />
+/// <reference lib="dom.iterable" />

src/lib/es5.full.d.ts

@@ -0,0 +1,4 @@
+/// <reference lib="es5" />
+/// <reference lib="dom" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />

src/lib/esnext.array.d.ts

@@ -3,7 +3,7 @@ interface ReadonlyArray<T> {
     /**
      * Calls a defined callback function on each element of an array. Then, flattens the result into
      * a new array.
-     * This is identical to a map followed by a flatten of depth 1.
+     * This is identical to a map followed by flat with depth 1.
      *
      * @param callback A function that accepts up to three arguments. The flatMap method calls the
      * callback function one time for each element in the array.
@@ -22,7 +22,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[][][][]> |
 
         ReadonlyArray<ReadonlyArray<U[][][]>> |
@@ -51,7 +51,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[][][]> |
 
         ReadonlyArray<ReadonlyArray<U>[][]> |
@@ -71,7 +71,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[][]> |
 
         ReadonlyArray<ReadonlyArray<U[]>> |
@@ -86,7 +86,7 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U[]> |
         ReadonlyArray<ReadonlyArray<U>>,
         depth?: 1
@@ -98,18 +98,18 @@ interface ReadonlyArray<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this:
+    flat<U>(this:
         ReadonlyArray<U>,
         depth: 0
     ): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
-     * specified depth. If no depth is provided, flatten method defaults to the depth of 1.
+     * specified depth. If no depth is provided, flat method defaults to the depth of 1.
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(depth?: number): any[];
+    flat<U>(depth?: number): any[];
   }
 
 interface Array<T> {
@@ -117,7 +117,7 @@ interface Array<T> {
     /**
      * Calls a defined callback function on each element of an array. Then, flattens the result into
      * a new array.
-     * This is identical to a map followed by a flatten of depth 1.
+     * This is identical to a map followed by flat with depth 1.
      *
      * @param callback A function that accepts up to three arguments. The flatMap method calls the
      * callback function one time for each element in the array.
@@ -135,7 +135,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][][][][], depth: 7): U[];
+    flat<U>(this: U[][][][][][][][], depth: 7): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -143,7 +143,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][][][], depth: 6): U[];
+    flat<U>(this: U[][][][][][][], depth: 6): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -151,7 +151,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][][], depth: 5): U[];
+    flat<U>(this: U[][][][][][], depth: 5): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -159,7 +159,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][][], depth: 4): U[];
+    flat<U>(this: U[][][][][], depth: 4): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -167,7 +167,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][][], depth: 3): U[];
+    flat<U>(this: U[][][][], depth: 3): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -175,7 +175,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][][], depth: 2): U[];
+    flat<U>(this: U[][][], depth: 2): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -183,7 +183,7 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[][], depth?: 1): U[];
+    flat<U>(this: U[][], depth?: 1): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
@@ -191,13 +191,13 @@ interface Array<T> {
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(this: U[], depth: 0): U[];
+    flat<U>(this: U[], depth: 0): U[];
 
     /**
      * Returns a new array with all sub-array elements concatenated into it recursively up to the
-     * specified depth. If no depth is provided, flatten method defaults to the depth of 1.
+     * specified depth. If no depth is provided, flat method defaults to the depth of 1.
      *
      * @param depth The maximum recursion depth
      */
-    flatten<U>(depth?: number): any[];
+    flat<U>(depth?: number): any[];
 }

src/lib/esnext.asynciterable.d.ts

@@ -1,5 +1,5 @@
-/// <reference path="lib.es2015.symbol.d.ts" />
-/// <reference path="lib.es2015.iterable.d.ts" />
+/// <reference lib="es2015.symbol" />
+/// <reference lib="es2015.iterable" />
 
 interface SymbolConstructor {
     /**

src/lib/esnext.d.ts

@@ -1,3 +1,4 @@
-/// <reference path="lib.es2018.d.ts" />
-/// <reference path="lib.esnext.asynciterable.d.ts" />
-/// <reference path="lib.esnext.array.d.ts" />
+/// <reference lib="es2018" />
+/// <reference lib="esnext.asynciterable" />
+/// <reference lib="esnext.array" />
+/// <reference lib="esnext.symbol" />

src/lib/esnext.full.d.ts

@@ -0,0 +1,5 @@
+/// <reference lib="esnext" />
+/// <reference lib="dom" />
+/// <reference lib="webworker.importscripts" />
+/// <reference lib="scripthost" />
+/// <reference lib="dom.iterable" />

src/lib/esnext.symbol.d.ts

@@ -0,0 +1,6 @@
+interface Symbol {
+    /**
+     * expose the [[Description]] internal slot of a symbol directly
+     */
+    readonly description: string;
+}

src/lib/libs.json

@@ -9,8 +9,9 @@
         "esnext",
         // Host only
         "dom.generated",
-        "dom.iterable",
+        "dom.iterable.generated",
         "webworker.generated",
+        "webworker.importscripts",
         "scripthost",
         // By-feature options
         "es2015.core",
@@ -33,6 +34,7 @@
         "es2018.intl",
         "esnext.asynciterable",
         "esnext.array",
+        "esnext.symbol",
         // Default libraries
         "es5.full",
         "es2015.full",
@@ -43,60 +45,9 @@
     ],
     "paths": {
         "dom.generated": "lib.dom.d.ts",
+        "dom.iterable.generated": "lib.dom.iterable.d.ts",
         "webworker.generated": "lib.webworker.d.ts",
         "es5.full": "lib.d.ts",
         "es2015.full": "lib.es6.d.ts"
-    },
-    "sources": {
-        "es5.full": [
-            "es5.d.ts",
-            "dom.generated.d.ts",
-            "webworker.importscripts.d.ts",
-            "scripthost.d.ts"
-        ],
-        "es2015.full": [
-            "es5.d.ts",
-            "es2015.core.d.ts",
-            "es2015.collection.d.ts",
-            "es2015.generator.d.ts",
-            "es2015.iterable.d.ts",
-            "es2015.promise.d.ts",
-            "es2015.proxy.d.ts",
-            "es2015.reflect.d.ts",
-            "es2015.symbol.d.ts",
-            "es2015.symbol.wellknown.d.ts",
-            "dom.generated.d.ts",
-            "webworker.importscripts.d.ts",
-            "scripthost.d.ts",
-            "dom.iterable.d.ts"
-        ],
-        "es2016.full": [
-            "es2016.d.ts",
-            "dom.generated.d.ts",
-            "webworker.importscripts.d.ts",
-            "scripthost.d.ts",
-            "dom.iterable.d.ts"
-        ],
-        "es2017.full": [
-            "es2017.d.ts",
-            "dom.generated.d.ts",
-            "webworker.importscripts.d.ts",
-            "scripthost.d.ts",
-            "dom.iterable.d.ts"
-        ],
-        "es2018.full": [
-            "es2018.d.ts",
-            "dom.generated.d.ts",
-            "webworker.importscripts.d.ts",
-            "scripthost.d.ts",
-            "dom.iterable.d.ts"
-        ],
-        "esnext.full": [
-            "esnext.d.ts",
-            "dom.generated.d.ts",
-            "webworker.importscripts.d.ts",
-            "scripthost.d.ts",
-            "dom.iterable.d.ts"
-        ]
     }
 }

src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2619,6 +2619,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[将命名导入转换为命名空间导入]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[将命名空间导入转换为命名导入]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5433,6 +5451,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[对象的类型为 "unknown"。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2619,6 +2619,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[將具名匯入轉換為命名空間匯入]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[將命名空間匯入轉換為具名匯入]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5433,6 +5451,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[物件的類型為 '未知'。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2628,6 +2628,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Převést pojmenované importy na import oboru názvů]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Převést import oboru názvů na pojmenované importy]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5442,6 +5460,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Objekt je typu Neznámý.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2616,6 +2616,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Benannte Importe in Namespaceimport konvertieren]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Namespaceimport in benannte Importe konvertieren]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5430,6 +5448,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Das Objekt ist vom Typ "Unbekannt".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>
@@ -8676,6 +8703,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces_1069" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Unexpected token. A type parameter name was expected without curly braces.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Unexpected_token_expected_1179" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Unexpected token. '{' expected.]]></Val>

src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2406,6 +2406,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Class_name_cannot_be_Object_when_targeting_ES5_with_module_0_2725" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Class name cannot be 'Object' when targeting ES5 with module {0}.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El nombre de clase no puede ser "Object" cuando el destino es ES5 con un módulo {0}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Class static side '{0}' incorrectly extends base class static side '{1}'.]]></Val>
@@ -2571,6 +2580,9 @@
       <Item ItemId=";Convert_0_to_mapped_object_type_95055" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert '{0}' to mapped object type]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertir "{0}" en el tipo de objeto asignado]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2619,6 +2631,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertir importaciones con nombre en una importación de espacio de nombres]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertir una importación de espacio de nombres en importaciones con nombre]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5433,6 +5463,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El objeto es de tipo "desconocido".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2631,6 +2631,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertir les importations nommées en importation d'espace de noms]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertir l'importation d'espace de noms en importations nommées]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5445,6 +5463,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[L'objet est de type 'unknown'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2619,6 +2619,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertire le importazioni denominate in importazione spazi dei nomi]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Convertire l'importazione spazi dei nomi in importazioni denominate]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5433,6 +5451,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[L'oggetto è di tipo 'unknown'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2619,6 +2619,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[名前付きインポートを名前空間インポートに変換します]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[名前空間インポートを名前付きインポートに変換します]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5433,6 +5451,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[オブジェクト型は 'unknown' です。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>
@@ -8682,6 +8709,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Unexpected_token_A_type_parameter_name_was_expected_without_curly_braces_1069" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Unexpected token. A type parameter name was expected without curly braces.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Unexpected_token_expected_1179" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Unexpected token. '{' expected.]]></Val>

src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2619,6 +2619,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[명명된 가져오기를 네임스페이스 가져오기로 변환]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[네임스페이스 가져오기를 명명된 가져오기로 변환]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5433,6 +5451,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[개체가 '알 수 없는' 형식입니다.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2609,6 +2609,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Konwertuj importy nazwane na import przestrzeni nazw]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Konwertuj import przestrzeni nazw na importy nazwane]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5423,6 +5441,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Obiekt jest typu „nieznany”.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2612,6 +2612,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Converter importações nomeadas em importação de namespace]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Converter importação de namespace em importações nomeadas]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5426,6 +5444,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O objeto é do tipo 'desconhecido'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>

src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl

@@ -2618,6 +2618,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Convert_named_imports_to_namespace_import_95057" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert named imports to namespace import]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Преобразовать операции импорта имен в импорт пространства имен]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Convert_namespace_import_to_named_imports_95056" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Convert namespace import to named imports]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Преобразовать импорт пространства имен в операции импорта имен]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Convert_require_to_import_95047" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Convert 'require' to 'import']]></Val>
@@ -5432,6 +5450,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Object_is_of_type_unknown_2571" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Object is of type 'unknown'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Объект имеет тип "Неизвестный".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Object_is_possibly_null_2531" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Object is possibly 'null'.]]></Val>