Update LKG (#25470)

2025-11-18 17:21:48 +00:00 · 2018-07-05 16:05:09 -07:00
parent 7ad72d2440
commit fd32cb97a4
27 changed files with 33564 additions and 28066 deletions
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Deklarace oboru názvů nemůže být umístěná před třídou nebo funkcí, se kterou se slučuje.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Deklarace oboru názvů je povolená jenom v oboru názvů nebo v modulu.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Import stylu oboru názvů není možné vyvolat nebo konstruovat a způsobí selhání za běhu.",
-  "A_non_dry_build_would_build_project_0_6357": "Build nedodržující princip DRY by vytvořil projekt {0}.",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Build nedodržující princip DRY by odstranil následující soubory: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Build bez příznaku -dry by vytvořil projekt {0}.",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Build bez příznaku -dry by odstranil následující soubory: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Inicializátor parametru je povolený jenom v implementaci funkce nebo konstruktoru.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Vlastnost parametru se nedá deklarovat pomocí parametru rest.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Vlastnost parametru je povolená jenom v implementaci konstruktoru.",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Eine Namespacedeklaration darf nicht vor der Klasse oder Funktion positioniert werden, mit der sie zusammengeführt wird.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Eine Namespacedeklaration ist nur in einem Namespace oder Modul zulässig.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Ein Import im Namespacestil kann nicht aufgerufen oder erstellt werden und verursacht zur Laufzeit einen Fehler.",
-  "A_non_dry_build_would_build_project_0_6357": "Bei einem echten Build würde das Projekt \"{0}\" erstellt.",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Bei einem echten Build würden die folgenden Dateien gelöscht: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Bei einem Build mit dem Flag \"-dry\" würde das Projekt \"{0}\" erstellt.",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Bei einem Build mit dem Flag \"-dry\" würden die folgenden Dateien gelöscht: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Ein Parameterinitialisierer ist nur in einer Funktions- oder Konstruktorimplementierung zulässig.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Eine Parametereigenschaft darf nicht mithilfe eines rest-Parameters deklariert werden.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Eine Parametereigenschaft ist nur in einer Konstruktorimplementierung zulässig.",
@@ -363,6 +363,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";A_required_element_cannot_follow_an_optional_element_1257" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[A required element cannot follow an optional element.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";A_required_parameter_cannot_follow_an_optional_parameter_1016" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[A required parameter cannot follow an optional parameter.]]></Val>
@@ -393,6 +399,18 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";A_rest_element_must_be_last_in_a_tuple_type_1256" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[A rest element must be last in a tuple type.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
+            <Item ItemId=";A_rest_element_type_must_be_an_array_type_2574" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[A rest element type must be an array type.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";A_rest_parameter_cannot_be_optional_1047" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[A rest parameter cannot be optional.]]></Val>
@@ -495,12 +513,6 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
-            <Item ItemId=";A_tuple_type_element_list_cannot_be_empty_1122" ItemType="0" PsrId="306" Leaf="true">
-              <Str Cat="Text">
-                <Val><![CDATA[A tuple type element list cannot be empty.]]></Val>
-              </Str>
-              <Disp Icon="Str" />
-            </Item>
            <Item ItemId=";A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses.]]></Val>
@@ -603,6 +615,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Add_all_missing_imports_95064" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Add all missing imports]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Add_all_missing_members_95022" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Add all missing members]]></Val>
@@ -657,6 +675,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Add_missing_enum_member_0_95063" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Add missing enum member '{0}']]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Add_missing_super_call_90001" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Add missing 'super()' call]]></Val>
@@ -1683,6 +1707,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Conflicts_are_in_this_file_6201" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Conflicts are in this file.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Construct signature, which lacks return-type annotation, implicitly has an 'any' return type.]]></Val>
@@ -1743,6 +1773,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Convert_default_export_to_named_export_95061" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Convert default export to named export]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Convert_function_0_to_class_95002" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Convert function '{0}' to class]]></Val>
@@ -1755,6 +1791,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Convert_named_export_to_default_export_95062" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Convert named export to default export]]></Val>
+              </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>
@@ -1869,6 +1911,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Definitions_of_the_following_identifiers_conflict_with_those_in_another_file_Colon_0_6200" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Definitions of the following identifiers conflict with those in another file: {0}]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Delete_all_unused_declarations_95024" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Delete all unused declarations]]></Val>
@@ -2805,6 +2853,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";If_the_0_package_actually_exposes_this_module_consider_sending_a_pull_request_to_amend_https_Colon_S_7040" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[If the '{0}' package actually exposes this module, consider sending a pull request to amend 'https://github.com/DefinitelyTyped/DefinitelyTyped/tree/master/types/{0}`]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Ignore_this_error_message_90019" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Ignore this error message]]></Val>
@@ -3405,9 +3459,9 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
-            <Item ItemId=";Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here_1340" ItemType="0" PsrId="306" Leaf="true">
+            <Item ItemId=";Module_0_does_not_refer_to_a_type_but_is_used_as_a_type_here_Did_you_mean_typeof_import_0_1340" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
-                <Val><![CDATA[Module '{0}' does not refer to a type, but is used as a type here.]]></Val>
+                <Val><![CDATA[Module '{0}' does not refer to a type, but is used as a type here. Did you mean 'typeof import('{0}')'?]]></Val>
              </Str>
              <Disp Icon="Str" />
            </Item>
@@ -4203,6 +4257,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Property_0_is_incompatible_with_rest_element_type_2573" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Property '{0}' is incompatible with rest element type.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Property_0_is_missing_in_type_1_2324" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Property '{0}' is missing in type '{1}'.]]></Val>
@@ -4257,6 +4317,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Property_0_is_used_before_its_initialization_2729" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Property '{0}' is used before its initialization.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -4593,6 +4659,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Rest_signatures_are_incompatible_2572" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Rest signatures are incompatible.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Rest_types_may_only_be_created_from_object_types_2700" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Rest types may only be created from object types.]]></Val>
@@ -5109,6 +5181,18 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";The_expected_type_comes_from_property_0_which_is_declared_here_on_type_1_6500" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[The expected type comes from property '{0}' which is declared here on type '{1}']]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
+            <Item ItemId=";The_expected_type_comes_from_this_index_signature_6501" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[The expected type comes from this index signature.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";The_expression_of_an_export_assignment_must_be_an_identifier_or_qualified_name_in_an_ambient_context_2714" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[The expression of an export assignment must be an identifier or qualified name in an ambient context.]]></Val>
@@ -5355,6 +5439,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";This_condition_will_always_return_0_since_the_types_1_and_2_have_no_overlap_2367" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[This condition will always return '{0}' since the types '{1}' and '{2}' have no overlap.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";This_constructor_function_may_be_converted_to_a_class_declaration_80002" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[This constructor function may be converted to a class declaration.]]></Val>
@@ -5619,6 +5709,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";Type_of_computed_property_s_value_is_0_which_is_not_assignable_to_type_1_2418" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[Type of computed property's value is '{0}', which is not assignable to type '{1}'.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";Type_of_iterated_elements_of_a_yield_Asterisk_operand_must_either_be_a_valid_promise_or_must_not_con_1322" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA[Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member.]]></Val>
@@ -6177,6 +6273,18 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";_0_was_also_declared_here_6203" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA['{0}' was also declared here.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
+            <Item ItemId=";_0_was_declared_here_2728" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA['{0}' was declared here.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA['{0}', which lacks return-type annotation, implicitly has an '{1}' return type.]]></Val>
@@ -6189,6 +6297,12 @@
              </Str>
              <Disp Icon="Str" />
            </Item>
+            <Item ItemId=";and_here_6204" ItemType="0" PsrId="306" Leaf="true">
+              <Str Cat="Text">
+                <Val><![CDATA[and here.]]></Val>
+              </Str>
+              <Disp Icon="Str" />
+            </Item>
            <Item ItemId=";await_expression_is_only_allowed_within_an_async_function_1308" ItemType="0" PsrId="306" Leaf="true">
              <Str Cat="Text">
                <Val><![CDATA['await' expression is only allowed within an async function.]]></Val>
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Una declaración de espacio de nombres no se puede situar antes que una clase o función con la que se combina.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Una declaración de espacio de nombres solo se permite en un espacio de nombres o en un módulo.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "No se puede llamar o construir una importación de estilo de espacio de nombres, y provocará un error en tiempo de ejecución.",
-  "A_non_dry_build_would_build_project_0_6357": "Una compilación no DRY compilaría el proyecto \"{0}\"",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Una compilación no DRY eliminaría los siguientes archivos: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Una compilación no -dry compilaría el proyecto \"{0}\"",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Una compilación no -dry eliminaría los archivos siguientes: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Un inicializador de parámetros solo se permite en una implementación de función o de constructor.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Una propiedad de parámetro no se puede declarar mediante un parámetro rest.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Una propiedad de parámetro solo se permite en una implementación de constructor.",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Une déclaration d'espace de noms ne peut pas se trouver avant une classe ou une fonction avec laquelle elle est fusionnée.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Une déclaration d'espace de noms est autorisée uniquement dans un espace de noms ou un module.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Impossible d'appeler ou de construire une importation de style d'espace de noms, ce qui va entraîner un échec au moment de l'exécution.",
-  "A_non_dry_build_would_build_project_0_6357": "Une build non-DRY générerait le projet '{0}'",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Une build non-DRY supprimerait les fichiers suivants : {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Une build non-dry va générer le projet '{0}'",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Une build non-dry va supprimer les fichiers suivants : {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Un initialiseur de paramètre est uniquement autorisé dans une implémentation de fonction ou de constructeur.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Impossible de déclarer une propriété de paramètre à l'aide d'un paramètre rest.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Une propriété de paramètre est uniquement autorisée dans une implémentation de constructeur.",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Una dichiarazione di spazio dei nomi non può essere specificata prima di una classe o funzione con cui è stato eseguito il merge.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Una dichiarazione di spazio dei nomi è consentita solo in uno spazio dei nomi o in un modulo.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Non è possibile chiamare o costruire un'importazione in stile spazio dei nomi. Questo comporterà un errore in fase di runtime.",
-  "A_non_dry_build_would_build_project_0_6357": "Se si esegue una compilazione non di prova, verrà compilato il progetto '{0}'",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Se si esegue una compilazione non di prova, i file seguenti verranno eliminati: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Se si esegue una compilazione senza flag -dry, verrà compilato il progetto '{0}'",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Se si esegue una compilazione senza flag -dry, i file seguenti verranno eliminati: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Un inizializzatore di parametro è consentito solo in un'implementazione di funzione o costruttore.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Non è possibile dichiarare una proprietà di parametro usando un parametro REST.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Una proprietà di parametro è consentita solo in un'implementazione di costruttore.",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "名前空間宣言は、それとマージするクラスや関数より前に配置できません。",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "名前空間宣言は、名前空間かモジュールでのみ使用できます。",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "名前空間スタイルのインポートを呼び出したり、構築したりすることはできません。実行時にエラーが発生する原因となります。",
-  "A_non_dry_build_would_build_project_0_6357": "非ドライ ビルドはプロジェクト '{0}' をビルドします",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "非ドライ ビルドは、次のファイルを削除します: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "非 -dry ビルドを実行した場合、プロジェクト '{0}' がビルドされます",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "非 -dry ビルドを実行した場合、次のファイルが削除されます: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "パラメーター初期化子は、関数またはコンストラクターの実装でのみ指定できます。",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "パラメーター プロパティは、rest パラメーターを使用して宣言することはできません。",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "パラメーター プロパティは、コンストラクターの実装でのみ指定できます。",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "네임스페이스 선언은 해당 선언이 병합된 클래스나 함수 앞에 있을 수 없습니다.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "네임스페이스 선언은 네임스페이스 또는 모듈에서만 사용할 수 있습니다.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "네임스페이스 스타일 가져오기를 호출하거나 생성할 수 없으며 런타임 시 오류가 발생합니다.",
-  "A_non_dry_build_would_build_project_0_6357": "DRY가 아닌 빌드는 프로젝트 '{0}'을(를) 빌드합니다.",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "DRY가 아닌 빌드는 다음 파일을 삭제합니다. {0}",
+  "A_non_dry_build_would_build_project_0_6357": "-dry가 아닌 빌드는 프로젝트 '{0}'을(를) 빌드합니다.",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "-dry가 아닌 빌드는 다음 파일을 삭제합니다. {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "매개 변수 이니셜라이저는 함수 또는 생성자 구현에서만 허용됩니다.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "rest 매개 변수를 사용하여 매개 변수 속성을 선언할 수 없습니다.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "매개 변수 속성은 생성자 구현에서만 허용됩니다.",
@@ -29,8 +29,7 @@ interface Map<K, V> {
 }

 interface MapConstructor {
-    new (): Map<any, any>;
-    new <K, V>(entries?: ReadonlyArray<[K, V]> | null): Map<K, V>;
+    new <K = any, V = any>(entries?: ReadonlyArray<[K, V]> | null): Map<K, V>;
    readonly prototype: Map<any, any>;
 }
 declare var Map: MapConstructor;
@@ -50,8 +49,7 @@ interface WeakMap<K extends object, V> {
 }

 interface WeakMapConstructor {
-    new (): WeakMap<object, any>;
-    new <K extends object, V>(entries?: ReadonlyArray<[K, V]> | null): WeakMap<K, V>;
+    new <K extends object = object, V = any>(entries?: ReadonlyArray<[K, V]> | null): WeakMap<K, V>;
    readonly prototype: WeakMap<object, any>;
 }
 declare var WeakMap: WeakMapConstructor;
@@ -66,8 +64,7 @@ interface Set<T> {
 }

 interface SetConstructor {
-    new (): Set<any>;
-    new <T>(values?: ReadonlyArray<T> | null): Set<T>;
+    new <T = any>(values?: ReadonlyArray<T> | null): Set<T>;
    readonly prototype: Set<any>;
 }
 declare var Set: SetConstructor;
@@ -85,8 +82,7 @@ interface WeakSet<T extends object> {
 }

 interface WeakSetConstructor {
-    new (): WeakSet<object>;
-    new <T extends object>(values?: ReadonlyArray<T> | null): WeakSet<T>;
+    new <T extends object = object>(values?: ReadonlyArray<T> | null): WeakSet<T>;
    readonly prototype: WeakSet<object>;
 }
 declare var WeakSet: WeakSetConstructor;
@@ -155,7 +155,7 @@ interface MapConstructor {
 interface WeakMap<K extends object, V> { }

 interface WeakMapConstructor {
-    new <K extends object, V>(iterable: Iterable<[K, V]>): WeakMap<K, V>;
+    new <K extends object = object, V = any>(iterable: Iterable<[K, V]>): WeakMap<K, V>;
 }

 interface Set<T> {
@@ -203,7 +203,7 @@ interface SetConstructor {
 interface WeakSet<T extends object> { }

 interface WeakSetConstructor {
-    new <T extends object>(iterable: Iterable<T>): WeakSet<T>;
+    new <T extends object = object>(iterable: Iterable<T>): WeakSet<T>;
 }

 interface Promise<T> { }
@@ -22,3 +22,4 @@ and limitations under the License.
 /// <reference lib="esnext.asynciterable" />
 /// <reference lib="esnext.array" />
 /// <reference lib="esnext.symbol" />
+/// <reference lib="esnext.intl" />
@@ -0,0 +1,32 @@
+/*! *****************************************************************************
+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"/>
+
+
+declare namespace Intl {
+    type NumberFormatPartTypes = "currency" | "decimal" | "fraction" | "group" | "infinity" | "integer" | "literal" | "minusSign" | "nan" | "plusSign" | "percentSign";
+
+    interface NumberFormatPart {
+        type: NumberFormatPartTypes;
+        value: string;
+    }
+
+    interface NumberFormat {
+        formatToParts(number?: number): NumberFormatPart[];
+    }
+  }
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Deklaracja przestrzeni nazw nie może występować przed klasą lub funkcją, z którą ją scalono.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Deklaracja przestrzeni nazw jest dozwolona tylko w przestrzeni nazw lub module.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Nie można wywołać lub skonstruować importu stylu przestrzeni nazw. Spowoduje to błąd w czasie wykonania.",
-  "A_non_dry_build_would_build_project_0_6357": "Kompilacja inna niż DRY spowodowałaby skompilowanie projektu „{0}”",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Kompilacja inna niż DRY spowodowałaby usunięcie następujących plików: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Kompilacja inna niż -dry spowodowałaby skompilowanie projektu „{0}”",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Kompilacja inna niż -dry spowodowałaby usunięcie następujących plików: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Inicjator parametru jest dozwolony tylko w implementacji funkcji lub konstruktora.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Właściwości parametru nie można zadeklarować za pomocą parametru rest.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Właściwość parametru jest dozwolona tylko w implementacji konstruktora.",
@@ -9,7 +9,9 @@ declare namespace ts.server.protocol {
        GetSpanOfEnclosingComment = "getSpanOfEnclosingComment",
        Change = "change",
        Close = "close",
+        /** @deprecated Prefer CompletionInfo -- see comment on CompletionsResponse */
        Completions = "completions",
+        CompletionInfo = "completionInfo",
        CompletionDetails = "completionEntryDetails",
        CompileOnSaveAffectedFileList = "compileOnSaveAffectedFileList",
        CompileOnSaveEmitFile = "compileOnSaveEmitFile",
@@ -464,7 +466,8 @@ declare namespace ts.server.protocol {
        command: CommandTypes.GetEditsForFileRename;
        arguments: GetEditsForFileRenameRequestArgs;
    }
-    interface GetEditsForFileRenameRequestArgs extends FileRequestArgs {
+    /** Note: Paths may also be directories. */
+    interface GetEditsForFileRenameRequestArgs {
        readonly oldFilePath: string;
        readonly newFilePath: string;
    }
@@ -1343,6 +1346,10 @@ declare namespace ts.server.protocol {
         * Optional prefix to apply to possible completions.
         */
        prefix?: string;
+        /**
+         * Character that was responsible for triggering completion.
+         * Should be `undefined` if a user manually requested completion.
+         */
        triggerCharacter?: CompletionsTriggerCharacter;
        /**
         * @deprecated Use UserPreferences.includeCompletionsForModuleExports
@@ -1485,9 +1492,19 @@ declare namespace ts.server.protocol {
         */
        source?: SymbolDisplayPart[];
    }
+    /** @deprecated Prefer CompletionInfoResponse, which supports several top-level fields in addition to the array of entries. */
    interface CompletionsResponse extends Response {
        body?: CompletionEntry[];
    }
+    interface CompletionInfoResponse extends Response {
+        body?: CompletionInfo;
+    }
+    interface CompletionInfo {
+        readonly isGlobalCompletion: boolean;
+        readonly isMemberCompletion: boolean;
+        readonly isNewIdentifierLocation: boolean;
+        readonly entries: ReadonlyArray<CompletionEntry>;
+    }
    interface CompletionDetailsResponse extends Response {
        body?: CompletionEntryDetails[];
    }
@@ -1570,10 +1587,50 @@ declare namespace ts.server.protocol {
         */
        argumentCount: number;
    }
+    type SignatureHelpTriggerCharacter = "," | "(" | "<";
+    type SignatureHelpRetriggerCharacter = SignatureHelpTriggerCharacter | ")";
    /**
     * Arguments of a signature help request.
     */
    interface SignatureHelpRequestArgs extends FileLocationRequestArgs {
+        /**
+         * Reason why signature help was invoked.
+         * See each individual possible
+         */
+        triggerReason?: SignatureHelpTriggerReason;
+    }
+    type SignatureHelpTriggerReason = SignatureHelpInvokedReason | SignatureHelpCharacterTypedReason | SignatureHelpRetriggeredReason;
+    /**
+     * Signals that the user manually requested signature help.
+     * The language service will unconditionally attempt to provide a result.
+     */
+    interface SignatureHelpInvokedReason {
+        kind: "invoked";
+        triggerCharacter?: undefined;
+    }
+    /**
+     * Signals that the signature help request came from a user typing a character.
+     * Depending on the character and the syntactic context, the request may or may not be served a result.
+     */
+    interface SignatureHelpCharacterTypedReason {
+        kind: "characterTyped";
+        /**
+         * Character that was responsible for triggering signature help.
+         */
+        triggerCharacter: SignatureHelpTriggerCharacter;
+    }
+    /**
+     * Signals that this signature help request came from typing a character or moving the cursor.
+     * This should only occur if a signature help session was already active and the editor needs to see if it should adjust.
+     * The language service will unconditionally attempt to provide a result.
+     * `triggerCharacter` can be `undefined` for a retrigger caused by a cursor move.
+     */
+    interface SignatureHelpRetriggeredReason {
+        kind: "retrigger";
+        /**
+         * Character that was responsible for triggering signature help.
+         */
+        triggerCharacter?: SignatureHelpRetriggerCharacter;
    }
    /**
     * Signature help request; value of command field is "signatureHelp".
@@ -1733,11 +1790,16 @@ declare namespace ts.server.protocol {
    }
    /**
     * Represents additional spans returned with a diagnostic which are relevant to it
-     * Like DiagnosticWithLinePosition, this is provided in two forms:
-     *   - start and length of the span
-     *   - startLocation and endLocation a pair of Location objects storing the start/end line offset of the span
     */
    interface DiagnosticRelatedInformation {
+        /**
+         * The category of the related information message, e.g. "error", "warning", or "suggestion".
+         */
+        category: string;
+        /**
+         * The code used ot identify the related information
+         */
+        code: number;
        /**
         * Text of related or additional information.
         */
@@ -1897,7 +1959,7 @@ declare namespace ts.server.protocol {
    /**
     * An item found in a navto response.
     */
-    interface NavtoItem {
+    interface NavtoItem extends FileSpan {
        /**
         * The symbol's name.
         */
@@ -1909,27 +1971,15 @@ declare namespace ts.server.protocol {
        /**
         * exact, substring, or prefix.
         */
-        matchKind?: string;
+        matchKind: string;
        /**
         * If this was a case sensitive or insensitive match.
         */
-        isCaseSensitive?: boolean;
+        isCaseSensitive: boolean;
        /**
         * Optional modifiers for the kind (such as 'public').
         */
        kindModifiers?: string;
-        /**
-         * The file in which the symbol is found.
-         */
-        file: string;
-        /**
-         * The location within file at which the symbol is found.
-         */
-        start: Location;
-        /**
-         * One past the last character of the symbol.
-         */
-        end: Location;
        /**
         * Name of symbol's container symbol (if any); for example,
         * the class name if symbol is a class member.
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Uma declaração de namespace não pode estar localizada antes de uma classe ou função com a qual ela é mesclada.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Uma declaração de namespace só é permitida e um namespace ou módulo.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Uma importação de estilo do namespace não pode ser chamada nem construída e causará uma falha no tempo de execução.",
-  "A_non_dry_build_would_build_project_0_6357": "Um build não dry compilaria o projeto '{0}'",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Um build não dry excluiria os seguintes arquivos: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "Um build não -dry compilaria o projeto '{0}'",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "Um build não -dry excluiria os seguintes arquivos: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Um inicializador de parâmetro só é permitido em uma implementação de função ou de construtor.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Uma propriedade de parâmetro não pode ser declarada usando um parâmetro rest.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Uma propriedade de parâmetro somente é permitida em uma implementação de construtor.",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Объявление пространства имен не может располагаться раньше класса или функции, с которыми оно объединено.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Объявление пространства имен разрешено использовать только в пространстве имен или модуле.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Импорт стиля пространства имен не может быть вызван или создан и приведет к сбою во время выполнения.",
-  "A_non_dry_build_would_build_project_0_6357": "При выполнении сборки в рабочем режиме будет собран проект \"{0}\"",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "При выполнении сборки в рабочем режиме будут удалены следующие файлы: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "При сборке без флага -dry будет собран проект \"{0}\"",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "При сборке без флага -dry будут удалены следующие файлы: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Инициализатор параметра разрешено использовать только в реализации функции или конструктора.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Свойство параметра невозможно объявить с помощью параметра REST.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Свойство параметра допускается только в реализации конструктора.",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "Bir ad alanı bildirimi, birleştirildiği sınıf veya işlevden önce gelemez.",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "Ad alanı bildirimine yalnızca bir ad alanında veya modülde izin verilir.",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "Bir ad alanı stili içeri aktarma işlemi çağrılamadığından veya oluşturulamadığından çalışma zamanında hataya yol açacak.",
-  "A_non_dry_build_would_build_project_0_6357": "DRY dışı bir derleme '{0}' projesini derler",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "DRY dışı bir derleme şu dosyaları siler: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "non-dry bir derleme '{0}' projesini derler",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "non-dry bir derleme şu dosyaları siler: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "Parametre başlatıcısına yalnızca bir işlevde veya oluşturucu uygulamasında izin verilir.",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "Parametre özelliği, rest parametresi kullanılarak bildirilemez.",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "Parametre özelliğine yalnızca bir oluşturucu uygulamasında izin verilir.",
@@ -242,144 +242,147 @@ declare namespace ts {
        TypeLiteral = 166,
        ArrayType = 167,
        TupleType = 168,
-        UnionType = 169,
-        IntersectionType = 170,
-        ConditionalType = 171,
-        InferType = 172,
-        ParenthesizedType = 173,
-        ThisType = 174,
-        TypeOperator = 175,
-        IndexedAccessType = 176,
-        MappedType = 177,
-        LiteralType = 178,
-        ImportType = 179,
-        ObjectBindingPattern = 180,
-        ArrayBindingPattern = 181,
-        BindingElement = 182,
-        ArrayLiteralExpression = 183,
-        ObjectLiteralExpression = 184,
-        PropertyAccessExpression = 185,
-        ElementAccessExpression = 186,
-        CallExpression = 187,
-        NewExpression = 188,
-        TaggedTemplateExpression = 189,
-        TypeAssertionExpression = 190,
-        ParenthesizedExpression = 191,
-        FunctionExpression = 192,
-        ArrowFunction = 193,
-        DeleteExpression = 194,
-        TypeOfExpression = 195,
-        VoidExpression = 196,
-        AwaitExpression = 197,
-        PrefixUnaryExpression = 198,
-        PostfixUnaryExpression = 199,
-        BinaryExpression = 200,
-        ConditionalExpression = 201,
-        TemplateExpression = 202,
-        YieldExpression = 203,
-        SpreadElement = 204,
-        ClassExpression = 205,
-        OmittedExpression = 206,
-        ExpressionWithTypeArguments = 207,
-        AsExpression = 208,
-        NonNullExpression = 209,
-        MetaProperty = 210,
-        TemplateSpan = 211,
-        SemicolonClassElement = 212,
-        Block = 213,
-        VariableStatement = 214,
-        EmptyStatement = 215,
-        ExpressionStatement = 216,
-        IfStatement = 217,
-        DoStatement = 218,
-        WhileStatement = 219,
-        ForStatement = 220,
-        ForInStatement = 221,
-        ForOfStatement = 222,
-        ContinueStatement = 223,
-        BreakStatement = 224,
-        ReturnStatement = 225,
-        WithStatement = 226,
-        SwitchStatement = 227,
-        LabeledStatement = 228,
-        ThrowStatement = 229,
-        TryStatement = 230,
-        DebuggerStatement = 231,
-        VariableDeclaration = 232,
-        VariableDeclarationList = 233,
-        FunctionDeclaration = 234,
-        ClassDeclaration = 235,
-        InterfaceDeclaration = 236,
-        TypeAliasDeclaration = 237,
-        EnumDeclaration = 238,
-        ModuleDeclaration = 239,
-        ModuleBlock = 240,
-        CaseBlock = 241,
-        NamespaceExportDeclaration = 242,
-        ImportEqualsDeclaration = 243,
-        ImportDeclaration = 244,
-        ImportClause = 245,
-        NamespaceImport = 246,
-        NamedImports = 247,
-        ImportSpecifier = 248,
-        ExportAssignment = 249,
-        ExportDeclaration = 250,
-        NamedExports = 251,
-        ExportSpecifier = 252,
-        MissingDeclaration = 253,
-        ExternalModuleReference = 254,
-        JsxElement = 255,
-        JsxSelfClosingElement = 256,
-        JsxOpeningElement = 257,
-        JsxClosingElement = 258,
-        JsxFragment = 259,
-        JsxOpeningFragment = 260,
-        JsxClosingFragment = 261,
-        JsxAttribute = 262,
-        JsxAttributes = 263,
-        JsxSpreadAttribute = 264,
-        JsxExpression = 265,
-        CaseClause = 266,
-        DefaultClause = 267,
-        HeritageClause = 268,
-        CatchClause = 269,
-        PropertyAssignment = 270,
-        ShorthandPropertyAssignment = 271,
-        SpreadAssignment = 272,
-        EnumMember = 273,
-        SourceFile = 274,
-        Bundle = 275,
-        UnparsedSource = 276,
-        InputFiles = 277,
-        JSDocTypeExpression = 278,
-        JSDocAllType = 279,
-        JSDocUnknownType = 280,
-        JSDocNullableType = 281,
-        JSDocNonNullableType = 282,
-        JSDocOptionalType = 283,
-        JSDocFunctionType = 284,
-        JSDocVariadicType = 285,
-        JSDocComment = 286,
-        JSDocTypeLiteral = 287,
-        JSDocSignature = 288,
-        JSDocTag = 289,
-        JSDocAugmentsTag = 290,
-        JSDocClassTag = 291,
-        JSDocCallbackTag = 292,
-        JSDocParameterTag = 293,
-        JSDocReturnTag = 294,
-        JSDocThisTag = 295,
-        JSDocTypeTag = 296,
-        JSDocTemplateTag = 297,
-        JSDocTypedefTag = 298,
-        JSDocPropertyTag = 299,
-        SyntaxList = 300,
-        NotEmittedStatement = 301,
-        PartiallyEmittedExpression = 302,
-        CommaListExpression = 303,
-        MergeDeclarationMarker = 304,
-        EndOfDeclarationMarker = 305,
-        Count = 306,
+        OptionalType = 169,
+        RestType = 170,
+        UnionType = 171,
+        IntersectionType = 172,
+        ConditionalType = 173,
+        InferType = 174,
+        ParenthesizedType = 175,
+        ThisType = 176,
+        TypeOperator = 177,
+        IndexedAccessType = 178,
+        MappedType = 179,
+        LiteralType = 180,
+        ImportType = 181,
+        ObjectBindingPattern = 182,
+        ArrayBindingPattern = 183,
+        BindingElement = 184,
+        ArrayLiteralExpression = 185,
+        ObjectLiteralExpression = 186,
+        PropertyAccessExpression = 187,
+        ElementAccessExpression = 188,
+        CallExpression = 189,
+        NewExpression = 190,
+        TaggedTemplateExpression = 191,
+        TypeAssertionExpression = 192,
+        ParenthesizedExpression = 193,
+        FunctionExpression = 194,
+        ArrowFunction = 195,
+        DeleteExpression = 196,
+        TypeOfExpression = 197,
+        VoidExpression = 198,
+        AwaitExpression = 199,
+        PrefixUnaryExpression = 200,
+        PostfixUnaryExpression = 201,
+        BinaryExpression = 202,
+        ConditionalExpression = 203,
+        TemplateExpression = 204,
+        YieldExpression = 205,
+        SpreadElement = 206,
+        ClassExpression = 207,
+        OmittedExpression = 208,
+        ExpressionWithTypeArguments = 209,
+        AsExpression = 210,
+        NonNullExpression = 211,
+        MetaProperty = 212,
+        SyntheticExpression = 213,
+        TemplateSpan = 214,
+        SemicolonClassElement = 215,
+        Block = 216,
+        VariableStatement = 217,
+        EmptyStatement = 218,
+        ExpressionStatement = 219,
+        IfStatement = 220,
+        DoStatement = 221,
+        WhileStatement = 222,
+        ForStatement = 223,
+        ForInStatement = 224,
+        ForOfStatement = 225,
+        ContinueStatement = 226,
+        BreakStatement = 227,
+        ReturnStatement = 228,
+        WithStatement = 229,
+        SwitchStatement = 230,
+        LabeledStatement = 231,
+        ThrowStatement = 232,
+        TryStatement = 233,
+        DebuggerStatement = 234,
+        VariableDeclaration = 235,
+        VariableDeclarationList = 236,
+        FunctionDeclaration = 237,
+        ClassDeclaration = 238,
+        InterfaceDeclaration = 239,
+        TypeAliasDeclaration = 240,
+        EnumDeclaration = 241,
+        ModuleDeclaration = 242,
+        ModuleBlock = 243,
+        CaseBlock = 244,
+        NamespaceExportDeclaration = 245,
+        ImportEqualsDeclaration = 246,
+        ImportDeclaration = 247,
+        ImportClause = 248,
+        NamespaceImport = 249,
+        NamedImports = 250,
+        ImportSpecifier = 251,
+        ExportAssignment = 252,
+        ExportDeclaration = 253,
+        NamedExports = 254,
+        ExportSpecifier = 255,
+        MissingDeclaration = 256,
+        ExternalModuleReference = 257,
+        JsxElement = 258,
+        JsxSelfClosingElement = 259,
+        JsxOpeningElement = 260,
+        JsxClosingElement = 261,
+        JsxFragment = 262,
+        JsxOpeningFragment = 263,
+        JsxClosingFragment = 264,
+        JsxAttribute = 265,
+        JsxAttributes = 266,
+        JsxSpreadAttribute = 267,
+        JsxExpression = 268,
+        CaseClause = 269,
+        DefaultClause = 270,
+        HeritageClause = 271,
+        CatchClause = 272,
+        PropertyAssignment = 273,
+        ShorthandPropertyAssignment = 274,
+        SpreadAssignment = 275,
+        EnumMember = 276,
+        SourceFile = 277,
+        Bundle = 278,
+        UnparsedSource = 279,
+        InputFiles = 280,
+        JSDocTypeExpression = 281,
+        JSDocAllType = 282,
+        JSDocUnknownType = 283,
+        JSDocNullableType = 284,
+        JSDocNonNullableType = 285,
+        JSDocOptionalType = 286,
+        JSDocFunctionType = 287,
+        JSDocVariadicType = 288,
+        JSDocComment = 289,
+        JSDocTypeLiteral = 290,
+        JSDocSignature = 291,
+        JSDocTag = 292,
+        JSDocAugmentsTag = 293,
+        JSDocClassTag = 294,
+        JSDocCallbackTag = 295,
+        JSDocParameterTag = 296,
+        JSDocReturnTag = 297,
+        JSDocThisTag = 298,
+        JSDocTypeTag = 299,
+        JSDocTemplateTag = 300,
+        JSDocTypedefTag = 301,
+        JSDocPropertyTag = 302,
+        SyntaxList = 303,
+        NotEmittedStatement = 304,
+        PartiallyEmittedExpression = 305,
+        CommaListExpression = 306,
+        MergeDeclarationMarker = 307,
+        EndOfDeclarationMarker = 308,
+        Count = 309,
        FirstAssignment = 58,
        LastAssignment = 70,
        FirstCompoundAssignment = 59,
@@ -391,7 +394,7 @@ declare namespace ts {
        FirstFutureReservedWord = 108,
        LastFutureReservedWord = 116,
        FirstTypeNode = 161,
-        LastTypeNode = 179,
+        LastTypeNode = 181,
        FirstPunctuation = 17,
        LastPunctuation = 70,
        FirstToken = 0,
@@ -405,10 +408,10 @@ declare namespace ts {
        FirstBinaryOperator = 27,
        LastBinaryOperator = 70,
        FirstNode = 146,
-        FirstJSDocNode = 278,
-        LastJSDocNode = 299,
-        FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 299
+        FirstJSDocNode = 281,
+        LastJSDocNode = 302,
+        FirstJSDocTagNode = 292,
+        LastJSDocTagNode = 302
    }
    enum NodeFlags {
        None = 0,
@@ -767,6 +770,14 @@ declare namespace ts {
        kind: SyntaxKind.TupleType;
        elementTypes: NodeArray<TypeNode>;
    }
+    interface OptionalTypeNode extends TypeNode {
+        kind: SyntaxKind.OptionalType;
+        type: TypeNode;
+    }
+    interface RestTypeNode extends TypeNode {
+        kind: SyntaxKind.RestType;
+        type: TypeNode;
+    }
    type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
    interface UnionTypeNode extends TypeNode {
        kind: SyntaxKind.UnionType;
@@ -891,6 +902,11 @@ declare namespace ts {
        asteriskToken?: AsteriskToken;
        expression?: Expression;
    }
+    interface SyntheticExpression extends Expression {
+        kind: SyntaxKind.SyntheticExpression;
+        isSpread: boolean;
+        type: Type;
+    }
    type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
    type MultiplicativeOperator = SyntaxKind.AsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken;
    type MultiplicativeOperatorOrHigher = ExponentiationOperator | MultiplicativeOperator;
@@ -1105,7 +1121,10 @@ declare namespace ts {
    }
    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
    type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
-    type JsxTagNameExpression = PrimaryExpression | PropertyAccessExpression;
+    type JsxTagNameExpression = Identifier | ThisExpression | JsxTagNamePropertyAccess;
+    interface JsxTagNamePropertyAccess extends PropertyAccessExpression {
+        expression: JsxTagNameExpression;
+    }
    interface JsxAttributes extends ObjectLiteralExpressionBase<JsxAttributeLike> {
        parent: JsxOpeningLikeElement;
    }
@@ -1780,6 +1799,7 @@ declare namespace ts {
         */
        getTypeChecker(): TypeChecker;
        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        isSourceFileDefaultLibrary(file: SourceFile): boolean;
        getProjectReferences(): (ResolvedProjectReference | undefined)[] | undefined;
    }
    interface ResolvedProjectReference {
@@ -1818,7 +1838,6 @@ declare namespace ts {
        inputSourceFileNames: string[];
        sourceMapNames?: string[];
        sourceMapMappings: string;
-        sourceMapDecodedMappings: SourceMapSpan[];
    }
    /** Return code used by getEmitOutput function to indicate status of the function */
    enum ExitStatus {
@@ -1838,7 +1857,7 @@ declare namespace ts {
        getPropertiesOfType(type: Type): Symbol[];
        getPropertyOfType(type: Type, propertyName: string): Symbol | undefined;
        getIndexInfoOfType(type: Type, kind: IndexKind): IndexInfo | undefined;
-        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
+        getSignaturesOfType(type: Type, kind: SignatureKind): ReadonlyArray<Signature>;
        getIndexTypeOfType(type: Type, kind: IndexKind): Type | undefined;
        getBaseTypes(type: InterfaceType): BaseType[];
        getBaseTypeOfLiteralType(type: Type): Type;
@@ -1889,11 +1908,6 @@ declare namespace ts {
        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): string;
        typePredicateToString(predicate: TypePredicate, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
-        /**
-         * @deprecated Use the createX factory functions or XToY typechecker methods and `createPrinter` or the `xToString` methods instead
-         * This will be removed in a future version.
-         */
-        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
        getFullyQualifiedName(symbol: Symbol): string;
        getAugmentedPropertiesOfType(type: Type): Symbol[];
        getRootSymbols(symbol: Symbol): Symbol[];
@@ -1920,7 +1934,7 @@ declare namespace ts {
        getAmbientModules(): Symbol[];
        tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
        getApparentType(type: Type): Type;
-        getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
+        getSuggestionForNonexistentProperty(name: Identifier | string, containingType: Type): string | undefined;
        getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
        getSuggestionForNonexistentModule(node: Identifier, target: Symbol): string | undefined;
        getBaseConstraintOfType(type: Type): Type | undefined;
@@ -1992,39 +2006,6 @@ declare namespace ts {
        AllowAnyNodeKind = 4,
        UseAliasDefinedOutsideCurrentScope = 8
    }
-    /**
-     * @deprecated
-     */
-    interface SymbolDisplayBuilder {
-        /** @deprecated */ buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        /** @deprecated */ buildSignatureDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
-        /** @deprecated */ buildIndexSignatureDisplay(info: IndexInfo, writer: SymbolWriter, kind: IndexKind, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]): void;
-        /** @deprecated */ buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildDisplayForParametersAndDelimiters(thisParameter: Symbol, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-    }
-    /**
-     * @deprecated Migrate to other methods of generating symbol names, ex symbolToEntityName + a printer or symbolToString
-     */
-    interface SymbolWriter extends SymbolTracker {
-        writeKeyword(text: string): void;
-        writeOperator(text: string): void;
-        writePunctuation(text: string): void;
-        writeSpace(text: string): void;
-        writeStringLiteral(text: string): void;
-        writeParameter(text: string): void;
-        writeProperty(text: string): void;
-        writeSymbol(text: string, symbol: Symbol): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        clear(): void;
-    }
    enum TypePredicateKind {
        This = 0,
        Identifier = 1
@@ -2214,7 +2195,7 @@ declare namespace ts {
        symbol: Symbol;
        pattern?: DestructuringPattern;
        aliasSymbol?: Symbol;
-        aliasTypeArguments?: Type[];
+        aliasTypeArguments?: ReadonlyArray<Type>;
    }
    interface LiteralType extends Type {
        value: string | number;
@@ -2279,10 +2260,18 @@ declare namespace ts {
     */
    interface TypeReference extends ObjectType {
        target: GenericType;
-        typeArguments?: Type[];
+        typeArguments?: ReadonlyArray<Type>;
    }
    interface GenericType extends InterfaceType, TypeReference {
    }
+    interface TupleType extends GenericType {
+        minLength: number;
+        hasRestElement: boolean;
+        associatedNames?: __String[];
+    }
+    interface TupleTypeReference extends TypeReference {
+        target: TupleType;
+    }
    interface UnionOrIntersectionType extends Type {
        types: Type[];
    }
@@ -2339,8 +2328,8 @@ declare namespace ts {
    }
    interface Signature {
        declaration?: SignatureDeclaration | JSDocSignature;
-        typeParameters?: TypeParameter[];
-        parameters: Symbol[];
+        typeParameters?: ReadonlyArray<TypeParameter>;
+        parameters: ReadonlyArray<Symbol>;
    }
    enum IndexKind {
        String = 0,
@@ -2388,14 +2377,14 @@ declare namespace ts {
        next?: DiagnosticMessageChain;
    }
    interface Diagnostic extends DiagnosticRelatedInformation {
-        category: DiagnosticCategory;
        /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
        reportsUnnecessary?: {};
-        code: number;
        source?: string;
        relatedInformation?: DiagnosticRelatedInformation[];
    }
    interface DiagnosticRelatedInformation {
+        category: DiagnosticCategory;
+        code: number;
        file: SourceFile | undefined;
        start: number | undefined;
        length: number | undefined;
@@ -2929,13 +2918,6 @@ declare namespace ts {
        directoryExists?(directoryName: string): boolean;
        getCurrentDirectory?(): string;
    }
-    /** @deprecated See comment on SymbolWriter */
-    interface SymbolTracker {
-        trackSymbol?(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
-        reportInaccessibleThisError?(): void;
-        reportPrivateInBaseOfClassExpression?(propertyName: string): void;
-        reportInaccessibleUniqueSymbolError?(): void;
-    }
    interface TextSpan {
        start: number;
        length: number;
@@ -3166,7 +3148,8 @@ declare namespace ts {
    function isParameterPropertyDeclaration(node: Node): node is ParameterPropertyDeclaration;
    function isEmptyBindingPattern(node: BindingName): node is BindingPattern;
    function isEmptyBindingElement(node: BindingElement): boolean;
-    function getCombinedModifierFlags(node: Node): ModifierFlags;
+    function walkUpBindingElementsAndPatterns(binding: BindingElement): VariableDeclaration | ParameterDeclaration;
+    function getCombinedModifierFlags(node: Declaration): ModifierFlags;
    function getCombinedNodeFlags(node: Node): NodeFlags;
    /**
     * Checks to see if the locale is in the appropriate format,
@@ -3212,15 +3195,8 @@ declare namespace ts {
    function unescapeLeadingUnderscores(identifier: __String): string;
    function idText(identifier: Identifier): string;
    function symbolName(symbol: Symbol): string;
-    /**
-     * Remove extra underscore from escaped identifier text content.
-     * @deprecated Use `id.text` for the unescaped text.
-     * @param identifier The escaped identifier text.
-     * @returns The unescaped identifier text.
-     */
-    function unescapeIdentifier(id: string): string;
    function getNameOfJSDocTypedef(declaration: JSDocTypedefTag): Identifier | undefined;
-    function getNameOfDeclaration(declaration: Declaration | Expression): DeclarationName;
+    function getNameOfDeclaration(declaration: Declaration | Expression): DeclarationName | undefined;
    /**
     * Gets the JSDoc parameter tags for the node if present.
     *
@@ -3655,7 +3631,7 @@ declare namespace ts {
    /** Create a unique name based on the supplied text. This does not consider names injected by the transformer. */
    function createFileLevelUniqueName(text: string): Identifier;
    /** Create a unique name generated for a node. */
-    function getGeneratedNameForNode(node: Node): Identifier;
+    function getGeneratedNameForNode(node: Node | undefined): Identifier;
    function createToken<TKind extends SyntaxKind>(token: TKind): Token<TKind>;
    function createSuper(): SuperExpression;
    function createThis(): ThisExpression & Token<SyntaxKind.ThisKeyword>;
@@ -3710,7 +3686,11 @@ declare namespace ts {
    function createArrayTypeNode(elementType: TypeNode): ArrayTypeNode;
    function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode;
    function createTupleTypeNode(elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
-    function updateTypleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function createOptionalTypeNode(type: TypeNode): OptionalTypeNode;
+    function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode;
+    function createRestTypeNode(type: TypeNode): RestTypeNode;
+    function updateRestTypeNode(node: RestTypeNode, type: TypeNode): RestTypeNode;
    function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode;
    function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
    function createIntersectionTypeNode(types: ReadonlyArray<TypeNode>): IntersectionTypeNode;
@@ -3763,7 +3743,7 @@ declare namespace ts {
    function createFunctionExpression(modifiers: ReadonlyArray<Modifier> | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration> | undefined, type: TypeNode | undefined, body: Block): FunctionExpression;
    function updateFunctionExpression(node: FunctionExpression, modifiers: ReadonlyArray<Modifier> | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, body: Block): FunctionExpression;
    function createArrowFunction(modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, equalsGreaterThanToken: EqualsGreaterThanToken | undefined, body: ConciseBody): ArrowFunction;
-    function updateArrowFunction(node: ArrowFunction, modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, body: ConciseBody): ArrowFunction;
+    /** @deprecated */ function updateArrowFunction(node: ArrowFunction, modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, body: ConciseBody): ArrowFunction;
    function updateArrowFunction(node: ArrowFunction, modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, equalsGreaterThanToken: Token<SyntaxKind.EqualsGreaterThanToken>, body: ConciseBody): ArrowFunction;
    function createDelete(expression: Expression): DeleteExpression;
    function updateDelete(node: DeleteExpression, expression: Expression): DeleteExpression;
@@ -3781,7 +3761,7 @@ declare namespace ts {
    function updateBinary(node: BinaryExpression, left: Expression, right: Expression, operator?: BinaryOperator | BinaryOperatorToken): BinaryExpression;
    function createConditional(condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
    function createConditional(condition: Expression, questionToken: QuestionToken, whenTrue: Expression, colonToken: ColonToken, whenFalse: Expression): ConditionalExpression;
-    function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    /** @deprecated */ function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
    function updateConditional(node: ConditionalExpression, condition: Expression, questionToken: Token<SyntaxKind.QuestionToken>, whenTrue: Expression, colonToken: Token<SyntaxKind.ColonToken>, whenFalse: Expression): ConditionalExpression;
    function createTemplateExpression(head: TemplateHead, templateSpans: ReadonlyArray<TemplateSpan>): TemplateExpression;
    function updateTemplateExpression(node: TemplateExpression, head: TemplateHead, templateSpans: ReadonlyArray<TemplateSpan>): TemplateExpression;
@@ -3813,8 +3793,12 @@ declare namespace ts {
    function createVariableStatement(modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList | ReadonlyArray<VariableDeclaration>): VariableStatement;
    function updateVariableStatement(node: VariableStatement, modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList): VariableStatement;
    function createEmptyStatement(): EmptyStatement;
-    function createStatement(expression: Expression): ExpressionStatement;
-    function updateStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
+    function createExpressionStatement(expression: Expression): ExpressionStatement;
+    function updateExpressionStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
+    /** @deprecated Use `createExpressionStatement` instead.  */
+    const createStatement: typeof createExpressionStatement;
+    /** @deprecated Use `updateExpressionStatement` instead.  */
+    const updateStatement: typeof updateExpressionStatement;
    function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement): IfStatement;
    function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement | undefined): IfStatement;
    function createDo(statement: Statement, expression: Expression): DoStatement;
@@ -4504,12 +4488,12 @@ declare namespace ts {
         */
        interface UpToDate {
            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes;
-            newestInputFileTime: Date;
-            newestInputFileName: string;
-            newestDeclarationFileContentChangedTime: Date;
-            newestOutputFileTime: Date;
-            newestOutputFileName: string;
-            oldestOutputFileName: string;
+            newestInputFileTime?: Date;
+            newestInputFileName?: string;
+            newestDeclarationFileContentChangedTime?: Date;
+            newestOutputFileTime?: Date;
+            newestOutputFileName?: string;
+            oldestOutputFileName?: string;
        }
        /**
         * One or more of the outputs of the project does not exist.
@@ -4629,8 +4613,8 @@ declare namespace ts {
        getProperties(): Symbol[];
        getProperty(propertyName: string): Symbol | undefined;
        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
+        getCallSignatures(): ReadonlyArray<Signature>;
+        getConstructSignatures(): ReadonlyArray<Signature>;
        getStringIndexType(): Type | undefined;
        getNumberIndexType(): Type | undefined;
        getBaseTypes(): BaseType[] | undefined;
@@ -4771,7 +4755,7 @@ declare namespace ts {
        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo | undefined;
        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan | undefined;
        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan | undefined;
-        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems | undefined;
+        getSignatureHelpItems(fileName: string, position: number, options: SignatureHelpItemsOptions | undefined): SignatureHelpItems | undefined;
        getRenameInfo(fileName: string, position: number): RenameInfo;
        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[] | undefined;
        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[] | undefined;
@@ -4831,13 +4815,54 @@ declare namespace ts {
    type OrganizeImportsScope = CombinedCodeFixScope;
    type CompletionsTriggerCharacter = "." | '"' | "'" | "`" | "/" | "@" | "<";
    interface GetCompletionsAtPositionOptions extends UserPreferences {
-        /** If the editor is asking for completions because a certain character was typed, and not because the user explicitly requested them, this should be set. */
+        /**
+         * If the editor is asking for completions because a certain character was typed
+         * (as opposed to when the user explicitly requested them) this should be set.
+         */
        triggerCharacter?: CompletionsTriggerCharacter;
        /** @deprecated Use includeCompletionsForModuleExports */
        includeExternalModuleExports?: boolean;
        /** @deprecated Use includeCompletionsWithInsertText */
        includeInsertTextCompletions?: boolean;
    }
+    type SignatureHelpTriggerCharacter = "," | "(" | "<";
+    type SignatureHelpRetriggerCharacter = SignatureHelpTriggerCharacter | ")";
+    interface SignatureHelpItemsOptions {
+        triggerReason?: SignatureHelpTriggerReason;
+    }
+    type SignatureHelpTriggerReason = SignatureHelpInvokedReason | SignatureHelpCharacterTypedReason | SignatureHelpRetriggeredReason;
+    /**
+     * Signals that the user manually requested signature help.
+     * The language service will unconditionally attempt to provide a result.
+     */
+    interface SignatureHelpInvokedReason {
+        kind: "invoked";
+        triggerCharacter?: undefined;
+    }
+    /**
+     * Signals that the signature help request came from a user typing a character.
+     * Depending on the character and the syntactic context, the request may or may not be served a result.
+     */
+    interface SignatureHelpCharacterTypedReason {
+        kind: "characterTyped";
+        /**
+         * Character that was responsible for triggering signature help.
+         */
+        triggerCharacter: SignatureHelpTriggerCharacter;
+    }
+    /**
+     * Signals that this signature help request came from typing a character or moving the cursor.
+     * This should only occur if a signature help session was already active and the editor needs to see if it should adjust.
+     * The language service will unconditionally attempt to provide a result.
+     * `triggerCharacter` can be `undefined` for a retrigger caused by a cursor move.
+     */
+    interface SignatureHelpRetriggeredReason {
+        kind: "retrigger";
+        /**
+         * Character that was responsible for triggering signature help.
+         */
+        triggerCharacter?: SignatureHelpRetriggerCharacter;
+    }
    interface ApplyCodeActionCommandResult {
        successMessage: string;
    }
@@ -5025,7 +5050,7 @@ declare namespace ts {
        name: string;
        kind: ScriptElementKind;
        kindModifiers: string;
-        matchKind: string;
+        matchKind: "exact" | "prefix" | "substring" | "camelCase";
        isCaseSensitive: boolean;
        fileName: string;
        textSpan: TextSpan;
@@ -242,144 +242,147 @@ declare namespace ts {
        TypeLiteral = 166,
        ArrayType = 167,
        TupleType = 168,
-        UnionType = 169,
-        IntersectionType = 170,
-        ConditionalType = 171,
-        InferType = 172,
-        ParenthesizedType = 173,
-        ThisType = 174,
-        TypeOperator = 175,
-        IndexedAccessType = 176,
-        MappedType = 177,
-        LiteralType = 178,
-        ImportType = 179,
-        ObjectBindingPattern = 180,
-        ArrayBindingPattern = 181,
-        BindingElement = 182,
-        ArrayLiteralExpression = 183,
-        ObjectLiteralExpression = 184,
-        PropertyAccessExpression = 185,
-        ElementAccessExpression = 186,
-        CallExpression = 187,
-        NewExpression = 188,
-        TaggedTemplateExpression = 189,
-        TypeAssertionExpression = 190,
-        ParenthesizedExpression = 191,
-        FunctionExpression = 192,
-        ArrowFunction = 193,
-        DeleteExpression = 194,
-        TypeOfExpression = 195,
-        VoidExpression = 196,
-        AwaitExpression = 197,
-        PrefixUnaryExpression = 198,
-        PostfixUnaryExpression = 199,
-        BinaryExpression = 200,
-        ConditionalExpression = 201,
-        TemplateExpression = 202,
-        YieldExpression = 203,
-        SpreadElement = 204,
-        ClassExpression = 205,
-        OmittedExpression = 206,
-        ExpressionWithTypeArguments = 207,
-        AsExpression = 208,
-        NonNullExpression = 209,
-        MetaProperty = 210,
-        TemplateSpan = 211,
-        SemicolonClassElement = 212,
-        Block = 213,
-        VariableStatement = 214,
-        EmptyStatement = 215,
-        ExpressionStatement = 216,
-        IfStatement = 217,
-        DoStatement = 218,
-        WhileStatement = 219,
-        ForStatement = 220,
-        ForInStatement = 221,
-        ForOfStatement = 222,
-        ContinueStatement = 223,
-        BreakStatement = 224,
-        ReturnStatement = 225,
-        WithStatement = 226,
-        SwitchStatement = 227,
-        LabeledStatement = 228,
-        ThrowStatement = 229,
-        TryStatement = 230,
-        DebuggerStatement = 231,
-        VariableDeclaration = 232,
-        VariableDeclarationList = 233,
-        FunctionDeclaration = 234,
-        ClassDeclaration = 235,
-        InterfaceDeclaration = 236,
-        TypeAliasDeclaration = 237,
-        EnumDeclaration = 238,
-        ModuleDeclaration = 239,
-        ModuleBlock = 240,
-        CaseBlock = 241,
-        NamespaceExportDeclaration = 242,
-        ImportEqualsDeclaration = 243,
-        ImportDeclaration = 244,
-        ImportClause = 245,
-        NamespaceImport = 246,
-        NamedImports = 247,
-        ImportSpecifier = 248,
-        ExportAssignment = 249,
-        ExportDeclaration = 250,
-        NamedExports = 251,
-        ExportSpecifier = 252,
-        MissingDeclaration = 253,
-        ExternalModuleReference = 254,
-        JsxElement = 255,
-        JsxSelfClosingElement = 256,
-        JsxOpeningElement = 257,
-        JsxClosingElement = 258,
-        JsxFragment = 259,
-        JsxOpeningFragment = 260,
-        JsxClosingFragment = 261,
-        JsxAttribute = 262,
-        JsxAttributes = 263,
-        JsxSpreadAttribute = 264,
-        JsxExpression = 265,
-        CaseClause = 266,
-        DefaultClause = 267,
-        HeritageClause = 268,
-        CatchClause = 269,
-        PropertyAssignment = 270,
-        ShorthandPropertyAssignment = 271,
-        SpreadAssignment = 272,
-        EnumMember = 273,
-        SourceFile = 274,
-        Bundle = 275,
-        UnparsedSource = 276,
-        InputFiles = 277,
-        JSDocTypeExpression = 278,
-        JSDocAllType = 279,
-        JSDocUnknownType = 280,
-        JSDocNullableType = 281,
-        JSDocNonNullableType = 282,
-        JSDocOptionalType = 283,
-        JSDocFunctionType = 284,
-        JSDocVariadicType = 285,
-        JSDocComment = 286,
-        JSDocTypeLiteral = 287,
-        JSDocSignature = 288,
-        JSDocTag = 289,
-        JSDocAugmentsTag = 290,
-        JSDocClassTag = 291,
-        JSDocCallbackTag = 292,
-        JSDocParameterTag = 293,
-        JSDocReturnTag = 294,
-        JSDocThisTag = 295,
-        JSDocTypeTag = 296,
-        JSDocTemplateTag = 297,
-        JSDocTypedefTag = 298,
-        JSDocPropertyTag = 299,
-        SyntaxList = 300,
-        NotEmittedStatement = 301,
-        PartiallyEmittedExpression = 302,
-        CommaListExpression = 303,
-        MergeDeclarationMarker = 304,
-        EndOfDeclarationMarker = 305,
-        Count = 306,
+        OptionalType = 169,
+        RestType = 170,
+        UnionType = 171,
+        IntersectionType = 172,
+        ConditionalType = 173,
+        InferType = 174,
+        ParenthesizedType = 175,
+        ThisType = 176,
+        TypeOperator = 177,
+        IndexedAccessType = 178,
+        MappedType = 179,
+        LiteralType = 180,
+        ImportType = 181,
+        ObjectBindingPattern = 182,
+        ArrayBindingPattern = 183,
+        BindingElement = 184,
+        ArrayLiteralExpression = 185,
+        ObjectLiteralExpression = 186,
+        PropertyAccessExpression = 187,
+        ElementAccessExpression = 188,
+        CallExpression = 189,
+        NewExpression = 190,
+        TaggedTemplateExpression = 191,
+        TypeAssertionExpression = 192,
+        ParenthesizedExpression = 193,
+        FunctionExpression = 194,
+        ArrowFunction = 195,
+        DeleteExpression = 196,
+        TypeOfExpression = 197,
+        VoidExpression = 198,
+        AwaitExpression = 199,
+        PrefixUnaryExpression = 200,
+        PostfixUnaryExpression = 201,
+        BinaryExpression = 202,
+        ConditionalExpression = 203,
+        TemplateExpression = 204,
+        YieldExpression = 205,
+        SpreadElement = 206,
+        ClassExpression = 207,
+        OmittedExpression = 208,
+        ExpressionWithTypeArguments = 209,
+        AsExpression = 210,
+        NonNullExpression = 211,
+        MetaProperty = 212,
+        SyntheticExpression = 213,
+        TemplateSpan = 214,
+        SemicolonClassElement = 215,
+        Block = 216,
+        VariableStatement = 217,
+        EmptyStatement = 218,
+        ExpressionStatement = 219,
+        IfStatement = 220,
+        DoStatement = 221,
+        WhileStatement = 222,
+        ForStatement = 223,
+        ForInStatement = 224,
+        ForOfStatement = 225,
+        ContinueStatement = 226,
+        BreakStatement = 227,
+        ReturnStatement = 228,
+        WithStatement = 229,
+        SwitchStatement = 230,
+        LabeledStatement = 231,
+        ThrowStatement = 232,
+        TryStatement = 233,
+        DebuggerStatement = 234,
+        VariableDeclaration = 235,
+        VariableDeclarationList = 236,
+        FunctionDeclaration = 237,
+        ClassDeclaration = 238,
+        InterfaceDeclaration = 239,
+        TypeAliasDeclaration = 240,
+        EnumDeclaration = 241,
+        ModuleDeclaration = 242,
+        ModuleBlock = 243,
+        CaseBlock = 244,
+        NamespaceExportDeclaration = 245,
+        ImportEqualsDeclaration = 246,
+        ImportDeclaration = 247,
+        ImportClause = 248,
+        NamespaceImport = 249,
+        NamedImports = 250,
+        ImportSpecifier = 251,
+        ExportAssignment = 252,
+        ExportDeclaration = 253,
+        NamedExports = 254,
+        ExportSpecifier = 255,
+        MissingDeclaration = 256,
+        ExternalModuleReference = 257,
+        JsxElement = 258,
+        JsxSelfClosingElement = 259,
+        JsxOpeningElement = 260,
+        JsxClosingElement = 261,
+        JsxFragment = 262,
+        JsxOpeningFragment = 263,
+        JsxClosingFragment = 264,
+        JsxAttribute = 265,
+        JsxAttributes = 266,
+        JsxSpreadAttribute = 267,
+        JsxExpression = 268,
+        CaseClause = 269,
+        DefaultClause = 270,
+        HeritageClause = 271,
+        CatchClause = 272,
+        PropertyAssignment = 273,
+        ShorthandPropertyAssignment = 274,
+        SpreadAssignment = 275,
+        EnumMember = 276,
+        SourceFile = 277,
+        Bundle = 278,
+        UnparsedSource = 279,
+        InputFiles = 280,
+        JSDocTypeExpression = 281,
+        JSDocAllType = 282,
+        JSDocUnknownType = 283,
+        JSDocNullableType = 284,
+        JSDocNonNullableType = 285,
+        JSDocOptionalType = 286,
+        JSDocFunctionType = 287,
+        JSDocVariadicType = 288,
+        JSDocComment = 289,
+        JSDocTypeLiteral = 290,
+        JSDocSignature = 291,
+        JSDocTag = 292,
+        JSDocAugmentsTag = 293,
+        JSDocClassTag = 294,
+        JSDocCallbackTag = 295,
+        JSDocParameterTag = 296,
+        JSDocReturnTag = 297,
+        JSDocThisTag = 298,
+        JSDocTypeTag = 299,
+        JSDocTemplateTag = 300,
+        JSDocTypedefTag = 301,
+        JSDocPropertyTag = 302,
+        SyntaxList = 303,
+        NotEmittedStatement = 304,
+        PartiallyEmittedExpression = 305,
+        CommaListExpression = 306,
+        MergeDeclarationMarker = 307,
+        EndOfDeclarationMarker = 308,
+        Count = 309,
        FirstAssignment = 58,
        LastAssignment = 70,
        FirstCompoundAssignment = 59,
@@ -391,7 +394,7 @@ declare namespace ts {
        FirstFutureReservedWord = 108,
        LastFutureReservedWord = 116,
        FirstTypeNode = 161,
-        LastTypeNode = 179,
+        LastTypeNode = 181,
        FirstPunctuation = 17,
        LastPunctuation = 70,
        FirstToken = 0,
@@ -405,10 +408,10 @@ declare namespace ts {
        FirstBinaryOperator = 27,
        LastBinaryOperator = 70,
        FirstNode = 146,
-        FirstJSDocNode = 278,
-        LastJSDocNode = 299,
-        FirstJSDocTagNode = 289,
-        LastJSDocTagNode = 299
+        FirstJSDocNode = 281,
+        LastJSDocNode = 302,
+        FirstJSDocTagNode = 292,
+        LastJSDocTagNode = 302
    }
    enum NodeFlags {
        None = 0,
@@ -767,6 +770,14 @@ declare namespace ts {
        kind: SyntaxKind.TupleType;
        elementTypes: NodeArray<TypeNode>;
    }
+    interface OptionalTypeNode extends TypeNode {
+        kind: SyntaxKind.OptionalType;
+        type: TypeNode;
+    }
+    interface RestTypeNode extends TypeNode {
+        kind: SyntaxKind.RestType;
+        type: TypeNode;
+    }
    type UnionOrIntersectionTypeNode = UnionTypeNode | IntersectionTypeNode;
    interface UnionTypeNode extends TypeNode {
        kind: SyntaxKind.UnionType;
@@ -891,6 +902,11 @@ declare namespace ts {
        asteriskToken?: AsteriskToken;
        expression?: Expression;
    }
+    interface SyntheticExpression extends Expression {
+        kind: SyntaxKind.SyntheticExpression;
+        isSpread: boolean;
+        type: Type;
+    }
    type ExponentiationOperator = SyntaxKind.AsteriskAsteriskToken;
    type MultiplicativeOperator = SyntaxKind.AsteriskToken | SyntaxKind.SlashToken | SyntaxKind.PercentToken;
    type MultiplicativeOperatorOrHigher = ExponentiationOperator | MultiplicativeOperator;
@@ -1105,7 +1121,10 @@ declare namespace ts {
    }
    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
    type JsxAttributeLike = JsxAttribute | JsxSpreadAttribute;
-    type JsxTagNameExpression = PrimaryExpression | PropertyAccessExpression;
+    type JsxTagNameExpression = Identifier | ThisExpression | JsxTagNamePropertyAccess;
+    interface JsxTagNamePropertyAccess extends PropertyAccessExpression {
+        expression: JsxTagNameExpression;
+    }
    interface JsxAttributes extends ObjectLiteralExpressionBase<JsxAttributeLike> {
        parent: JsxOpeningLikeElement;
    }
@@ -1780,6 +1799,7 @@ declare namespace ts {
         */
        getTypeChecker(): TypeChecker;
        isSourceFileFromExternalLibrary(file: SourceFile): boolean;
+        isSourceFileDefaultLibrary(file: SourceFile): boolean;
        getProjectReferences(): (ResolvedProjectReference | undefined)[] | undefined;
    }
    interface ResolvedProjectReference {
@@ -1818,7 +1838,6 @@ declare namespace ts {
        inputSourceFileNames: string[];
        sourceMapNames?: string[];
        sourceMapMappings: string;
-        sourceMapDecodedMappings: SourceMapSpan[];
    }
    /** Return code used by getEmitOutput function to indicate status of the function */
    enum ExitStatus {
@@ -1838,7 +1857,7 @@ declare namespace ts {
        getPropertiesOfType(type: Type): Symbol[];
        getPropertyOfType(type: Type, propertyName: string): Symbol | undefined;
        getIndexInfoOfType(type: Type, kind: IndexKind): IndexInfo | undefined;
-        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
+        getSignaturesOfType(type: Type, kind: SignatureKind): ReadonlyArray<Signature>;
        getIndexTypeOfType(type: Type, kind: IndexKind): Type | undefined;
        getBaseTypes(type: InterfaceType): BaseType[];
        getBaseTypeOfLiteralType(type: Type): Type;
@@ -1889,11 +1908,6 @@ declare namespace ts {
        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): string;
        typePredicateToString(predicate: TypePredicate, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
-        /**
-         * @deprecated Use the createX factory functions or XToY typechecker methods and `createPrinter` or the `xToString` methods instead
-         * This will be removed in a future version.
-         */
-        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
        getFullyQualifiedName(symbol: Symbol): string;
        getAugmentedPropertiesOfType(type: Type): Symbol[];
        getRootSymbols(symbol: Symbol): Symbol[];
@@ -1920,7 +1934,7 @@ declare namespace ts {
        getAmbientModules(): Symbol[];
        tryGetMemberInModuleExports(memberName: string, moduleSymbol: Symbol): Symbol | undefined;
        getApparentType(type: Type): Type;
-        getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
+        getSuggestionForNonexistentProperty(name: Identifier | string, containingType: Type): string | undefined;
        getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
        getSuggestionForNonexistentModule(node: Identifier, target: Symbol): string | undefined;
        getBaseConstraintOfType(type: Type): Type | undefined;
@@ -1992,39 +2006,6 @@ declare namespace ts {
        AllowAnyNodeKind = 4,
        UseAliasDefinedOutsideCurrentScope = 8
    }
-    /**
-     * @deprecated
-     */
-    interface SymbolDisplayBuilder {
-        /** @deprecated */ buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        /** @deprecated */ buildSignatureDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
-        /** @deprecated */ buildIndexSignatureDisplay(info: IndexInfo, writer: SymbolWriter, kind: IndexKind, enclosingDeclaration?: Node, globalFlags?: TypeFormatFlags, symbolStack?: Symbol[]): void;
-        /** @deprecated */ buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildDisplayForParametersAndDelimiters(thisParameter: Symbol, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        /** @deprecated */ buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-    }
-    /**
-     * @deprecated Migrate to other methods of generating symbol names, ex symbolToEntityName + a printer or symbolToString
-     */
-    interface SymbolWriter extends SymbolTracker {
-        writeKeyword(text: string): void;
-        writeOperator(text: string): void;
-        writePunctuation(text: string): void;
-        writeSpace(text: string): void;
-        writeStringLiteral(text: string): void;
-        writeParameter(text: string): void;
-        writeProperty(text: string): void;
-        writeSymbol(text: string, symbol: Symbol): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        clear(): void;
-    }
    enum TypePredicateKind {
        This = 0,
        Identifier = 1
@@ -2214,7 +2195,7 @@ declare namespace ts {
        symbol: Symbol;
        pattern?: DestructuringPattern;
        aliasSymbol?: Symbol;
-        aliasTypeArguments?: Type[];
+        aliasTypeArguments?: ReadonlyArray<Type>;
    }
    interface LiteralType extends Type {
        value: string | number;
@@ -2279,10 +2260,18 @@ declare namespace ts {
     */
    interface TypeReference extends ObjectType {
        target: GenericType;
-        typeArguments?: Type[];
+        typeArguments?: ReadonlyArray<Type>;
    }
    interface GenericType extends InterfaceType, TypeReference {
    }
+    interface TupleType extends GenericType {
+        minLength: number;
+        hasRestElement: boolean;
+        associatedNames?: __String[];
+    }
+    interface TupleTypeReference extends TypeReference {
+        target: TupleType;
+    }
    interface UnionOrIntersectionType extends Type {
        types: Type[];
    }
@@ -2339,8 +2328,8 @@ declare namespace ts {
    }
    interface Signature {
        declaration?: SignatureDeclaration | JSDocSignature;
-        typeParameters?: TypeParameter[];
-        parameters: Symbol[];
+        typeParameters?: ReadonlyArray<TypeParameter>;
+        parameters: ReadonlyArray<Symbol>;
    }
    enum IndexKind {
        String = 0,
@@ -2388,14 +2377,14 @@ declare namespace ts {
        next?: DiagnosticMessageChain;
    }
    interface Diagnostic extends DiagnosticRelatedInformation {
-        category: DiagnosticCategory;
        /** May store more in future. For now, this will simply be `true` to indicate when a diagnostic is an unused-identifier diagnostic. */
        reportsUnnecessary?: {};
-        code: number;
        source?: string;
        relatedInformation?: DiagnosticRelatedInformation[];
    }
    interface DiagnosticRelatedInformation {
+        category: DiagnosticCategory;
+        code: number;
        file: SourceFile | undefined;
        start: number | undefined;
        length: number | undefined;
@@ -2929,13 +2918,6 @@ declare namespace ts {
        directoryExists?(directoryName: string): boolean;
        getCurrentDirectory?(): string;
    }
-    /** @deprecated See comment on SymbolWriter */
-    interface SymbolTracker {
-        trackSymbol?(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
-        reportInaccessibleThisError?(): void;
-        reportPrivateInBaseOfClassExpression?(propertyName: string): void;
-        reportInaccessibleUniqueSymbolError?(): void;
-    }
    interface TextSpan {
        start: number;
        length: number;
@@ -3166,7 +3148,8 @@ declare namespace ts {
    function isParameterPropertyDeclaration(node: Node): node is ParameterPropertyDeclaration;
    function isEmptyBindingPattern(node: BindingName): node is BindingPattern;
    function isEmptyBindingElement(node: BindingElement): boolean;
-    function getCombinedModifierFlags(node: Node): ModifierFlags;
+    function walkUpBindingElementsAndPatterns(binding: BindingElement): VariableDeclaration | ParameterDeclaration;
+    function getCombinedModifierFlags(node: Declaration): ModifierFlags;
    function getCombinedNodeFlags(node: Node): NodeFlags;
    /**
     * Checks to see if the locale is in the appropriate format,
@@ -3212,15 +3195,8 @@ declare namespace ts {
    function unescapeLeadingUnderscores(identifier: __String): string;
    function idText(identifier: Identifier): string;
    function symbolName(symbol: Symbol): string;
-    /**
-     * Remove extra underscore from escaped identifier text content.
-     * @deprecated Use `id.text` for the unescaped text.
-     * @param identifier The escaped identifier text.
-     * @returns The unescaped identifier text.
-     */
-    function unescapeIdentifier(id: string): string;
    function getNameOfJSDocTypedef(declaration: JSDocTypedefTag): Identifier | undefined;
-    function getNameOfDeclaration(declaration: Declaration | Expression): DeclarationName;
+    function getNameOfDeclaration(declaration: Declaration | Expression): DeclarationName | undefined;
    /**
     * Gets the JSDoc parameter tags for the node if present.
     *
@@ -3655,7 +3631,7 @@ declare namespace ts {
    /** Create a unique name based on the supplied text. This does not consider names injected by the transformer. */
    function createFileLevelUniqueName(text: string): Identifier;
    /** Create a unique name generated for a node. */
-    function getGeneratedNameForNode(node: Node): Identifier;
+    function getGeneratedNameForNode(node: Node | undefined): Identifier;
    function createToken<TKind extends SyntaxKind>(token: TKind): Token<TKind>;
    function createSuper(): SuperExpression;
    function createThis(): ThisExpression & Token<SyntaxKind.ThisKeyword>;
@@ -3710,7 +3686,11 @@ declare namespace ts {
    function createArrayTypeNode(elementType: TypeNode): ArrayTypeNode;
    function updateArrayTypeNode(node: ArrayTypeNode, elementType: TypeNode): ArrayTypeNode;
    function createTupleTypeNode(elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
-    function updateTypleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function updateTupleTypeNode(node: TupleTypeNode, elementTypes: ReadonlyArray<TypeNode>): TupleTypeNode;
+    function createOptionalTypeNode(type: TypeNode): OptionalTypeNode;
+    function updateOptionalTypeNode(node: OptionalTypeNode, type: TypeNode): OptionalTypeNode;
+    function createRestTypeNode(type: TypeNode): RestTypeNode;
+    function updateRestTypeNode(node: RestTypeNode, type: TypeNode): RestTypeNode;
    function createUnionTypeNode(types: ReadonlyArray<TypeNode>): UnionTypeNode;
    function updateUnionTypeNode(node: UnionTypeNode, types: NodeArray<TypeNode>): UnionTypeNode;
    function createIntersectionTypeNode(types: ReadonlyArray<TypeNode>): IntersectionTypeNode;
@@ -3763,7 +3743,7 @@ declare namespace ts {
    function createFunctionExpression(modifiers: ReadonlyArray<Modifier> | undefined, asteriskToken: AsteriskToken | undefined, name: string | Identifier | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration> | undefined, type: TypeNode | undefined, body: Block): FunctionExpression;
    function updateFunctionExpression(node: FunctionExpression, modifiers: ReadonlyArray<Modifier> | undefined, asteriskToken: AsteriskToken | undefined, name: Identifier | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, body: Block): FunctionExpression;
    function createArrowFunction(modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, equalsGreaterThanToken: EqualsGreaterThanToken | undefined, body: ConciseBody): ArrowFunction;
-    function updateArrowFunction(node: ArrowFunction, modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, body: ConciseBody): ArrowFunction;
+    /** @deprecated */ function updateArrowFunction(node: ArrowFunction, modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, body: ConciseBody): ArrowFunction;
    function updateArrowFunction(node: ArrowFunction, modifiers: ReadonlyArray<Modifier> | undefined, typeParameters: ReadonlyArray<TypeParameterDeclaration> | undefined, parameters: ReadonlyArray<ParameterDeclaration>, type: TypeNode | undefined, equalsGreaterThanToken: Token<SyntaxKind.EqualsGreaterThanToken>, body: ConciseBody): ArrowFunction;
    function createDelete(expression: Expression): DeleteExpression;
    function updateDelete(node: DeleteExpression, expression: Expression): DeleteExpression;
@@ -3781,7 +3761,7 @@ declare namespace ts {
    function updateBinary(node: BinaryExpression, left: Expression, right: Expression, operator?: BinaryOperator | BinaryOperatorToken): BinaryExpression;
    function createConditional(condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
    function createConditional(condition: Expression, questionToken: QuestionToken, whenTrue: Expression, colonToken: ColonToken, whenFalse: Expression): ConditionalExpression;
-    function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
+    /** @deprecated */ function updateConditional(node: ConditionalExpression, condition: Expression, whenTrue: Expression, whenFalse: Expression): ConditionalExpression;
    function updateConditional(node: ConditionalExpression, condition: Expression, questionToken: Token<SyntaxKind.QuestionToken>, whenTrue: Expression, colonToken: Token<SyntaxKind.ColonToken>, whenFalse: Expression): ConditionalExpression;
    function createTemplateExpression(head: TemplateHead, templateSpans: ReadonlyArray<TemplateSpan>): TemplateExpression;
    function updateTemplateExpression(node: TemplateExpression, head: TemplateHead, templateSpans: ReadonlyArray<TemplateSpan>): TemplateExpression;
@@ -3813,8 +3793,12 @@ declare namespace ts {
    function createVariableStatement(modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList | ReadonlyArray<VariableDeclaration>): VariableStatement;
    function updateVariableStatement(node: VariableStatement, modifiers: ReadonlyArray<Modifier> | undefined, declarationList: VariableDeclarationList): VariableStatement;
    function createEmptyStatement(): EmptyStatement;
-    function createStatement(expression: Expression): ExpressionStatement;
-    function updateStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
+    function createExpressionStatement(expression: Expression): ExpressionStatement;
+    function updateExpressionStatement(node: ExpressionStatement, expression: Expression): ExpressionStatement;
+    /** @deprecated Use `createExpressionStatement` instead.  */
+    const createStatement: typeof createExpressionStatement;
+    /** @deprecated Use `updateExpressionStatement` instead.  */
+    const updateStatement: typeof updateExpressionStatement;
    function createIf(expression: Expression, thenStatement: Statement, elseStatement?: Statement): IfStatement;
    function updateIf(node: IfStatement, expression: Expression, thenStatement: Statement, elseStatement: Statement | undefined): IfStatement;
    function createDo(statement: Statement, expression: Expression): DoStatement;
@@ -4504,12 +4488,12 @@ declare namespace ts {
         */
        interface UpToDate {
            type: UpToDateStatusType.UpToDate | UpToDateStatusType.UpToDateWithUpstreamTypes;
-            newestInputFileTime: Date;
-            newestInputFileName: string;
-            newestDeclarationFileContentChangedTime: Date;
-            newestOutputFileTime: Date;
-            newestOutputFileName: string;
-            oldestOutputFileName: string;
+            newestInputFileTime?: Date;
+            newestInputFileName?: string;
+            newestDeclarationFileContentChangedTime?: Date;
+            newestOutputFileTime?: Date;
+            newestOutputFileName?: string;
+            oldestOutputFileName?: string;
        }
        /**
         * One or more of the outputs of the project does not exist.
@@ -4629,8 +4613,8 @@ declare namespace ts {
        getProperties(): Symbol[];
        getProperty(propertyName: string): Symbol | undefined;
        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
+        getCallSignatures(): ReadonlyArray<Signature>;
+        getConstructSignatures(): ReadonlyArray<Signature>;
        getStringIndexType(): Type | undefined;
        getNumberIndexType(): Type | undefined;
        getBaseTypes(): BaseType[] | undefined;
@@ -4771,7 +4755,7 @@ declare namespace ts {
        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo | undefined;
        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan | undefined;
        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan | undefined;
-        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems | undefined;
+        getSignatureHelpItems(fileName: string, position: number, options: SignatureHelpItemsOptions | undefined): SignatureHelpItems | undefined;
        getRenameInfo(fileName: string, position: number): RenameInfo;
        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[] | undefined;
        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[] | undefined;
@@ -4831,13 +4815,54 @@ declare namespace ts {
    type OrganizeImportsScope = CombinedCodeFixScope;
    type CompletionsTriggerCharacter = "." | '"' | "'" | "`" | "/" | "@" | "<";
    interface GetCompletionsAtPositionOptions extends UserPreferences {
-        /** If the editor is asking for completions because a certain character was typed, and not because the user explicitly requested them, this should be set. */
+        /**
+         * If the editor is asking for completions because a certain character was typed
+         * (as opposed to when the user explicitly requested them) this should be set.
+         */
        triggerCharacter?: CompletionsTriggerCharacter;
        /** @deprecated Use includeCompletionsForModuleExports */
        includeExternalModuleExports?: boolean;
        /** @deprecated Use includeCompletionsWithInsertText */
        includeInsertTextCompletions?: boolean;
    }
+    type SignatureHelpTriggerCharacter = "," | "(" | "<";
+    type SignatureHelpRetriggerCharacter = SignatureHelpTriggerCharacter | ")";
+    interface SignatureHelpItemsOptions {
+        triggerReason?: SignatureHelpTriggerReason;
+    }
+    type SignatureHelpTriggerReason = SignatureHelpInvokedReason | SignatureHelpCharacterTypedReason | SignatureHelpRetriggeredReason;
+    /**
+     * Signals that the user manually requested signature help.
+     * The language service will unconditionally attempt to provide a result.
+     */
+    interface SignatureHelpInvokedReason {
+        kind: "invoked";
+        triggerCharacter?: undefined;
+    }
+    /**
+     * Signals that the signature help request came from a user typing a character.
+     * Depending on the character and the syntactic context, the request may or may not be served a result.
+     */
+    interface SignatureHelpCharacterTypedReason {
+        kind: "characterTyped";
+        /**
+         * Character that was responsible for triggering signature help.
+         */
+        triggerCharacter: SignatureHelpTriggerCharacter;
+    }
+    /**
+     * Signals that this signature help request came from typing a character or moving the cursor.
+     * This should only occur if a signature help session was already active and the editor needs to see if it should adjust.
+     * The language service will unconditionally attempt to provide a result.
+     * `triggerCharacter` can be `undefined` for a retrigger caused by a cursor move.
+     */
+    interface SignatureHelpRetriggeredReason {
+        kind: "retrigger";
+        /**
+         * Character that was responsible for triggering signature help.
+         */
+        triggerCharacter?: SignatureHelpRetriggerCharacter;
+    }
    interface ApplyCodeActionCommandResult {
        successMessage: string;
    }
@@ -5025,7 +5050,7 @@ declare namespace ts {
        name: string;
        kind: ScriptElementKind;
        kindModifiers: string;
-        matchKind: string;
+        matchKind: "exact" | "prefix" | "substring" | "camelCase";
        isCaseSensitive: boolean;
        fileName: string;
        textSpan: TextSpan;
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "命名空间声明不能位于与之合并的类或函数前",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "只允许在命名空间或模块中使用命名空间声明。",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "命名空间样式导入不能调用或构造，并将在运行时导致失败。",
-  "A_non_dry_build_would_build_project_0_6357": "非干燥生成将生成项目“{0}”",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "非干燥生成将删除以下文件: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "非 -dry 生成将生成项目“{0}”",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "非 -dry 生成将删除以下文件: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "只允许在函数或构造函数实现中使用参数初始化表达式。",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "不能使用 rest 参数声明参数属性。",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "只允许在构造函数实现中使用参数属性。",
@@ -49,8 +49,8 @@
  "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434": "命名空間宣告的位置不得先於其要合併的類別或函式。",
  "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235": "只有命名空間或模組才允許命名空間宣告。",
  "A_namespace_style_import_cannot_be_called_or_constructed_and_will_cause_a_failure_at_runtime_7038": "命名空間樣式的匯入無法加以呼叫或建構，而且會導致執行階段失敗。",
-  "A_non_dry_build_would_build_project_0_6357": "非 DRY 的組建會建置專案 '{0}'",
-  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "非 DRY 的組建會刪除下列檔案: {0}",
+  "A_non_dry_build_would_build_project_0_6357": "非 -dry 組建會建置專案 '{0}'",
+  "A_non_dry_build_would_delete_the_following_files_Colon_0_6356": "非 -dry 組建會刪除下列檔案: {0}",
  "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371": "只有函式或建構函式實作才可使用參數初始設定式。",
  "A_parameter_property_cannot_be_declared_using_a_rest_parameter_1317": "無法使用剩餘參數宣告參數屬性。",
  "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369": "建構函式實作中只可有一個參數屬性。",