Merge pull request #3698 from Microsoft/noObjectBindingBuilder

Don't show a builder for property names in object binding patterns

src/services/services.ts

@@ -3013,21 +3013,30 @@ namespace ts {
                 let objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken);
                 let jsxContainer = tryGetContainingJsxElement(contextToken);
                 if (objectLikeContainer) {
-                    // Object literal expression, look up possible property names from contextual type
+                    // We're looking up possible property names from contextual/inferred/declared type.
                     isMemberCompletion = true;
-                    isNewIdentifierLocation = true;
 
                     let typeForObject: Type;
                     let existingMembers: Declaration[];
 
                     if (objectLikeContainer.kind === SyntaxKind.ObjectLiteralExpression) {
+                        // We are completing on contextual types, but may also include properties
+                        // other than those within the declared type.
+                        isNewIdentifierLocation = true;
+
                         typeForObject = typeChecker.getContextualType(<ObjectLiteralExpression>objectLikeContainer);
                         existingMembers = (<ObjectLiteralExpression>objectLikeContainer).properties;
                     }
-                    else {
+                    else if (objectLikeContainer.kind === SyntaxKind.ObjectBindingPattern) {
+                        // We are *only* completing on properties from the type being destructured.
+                        isNewIdentifierLocation = false;
+
                         typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
                         existingMembers = (<BindingPattern>objectLikeContainer).elements;
                     }
+                    else {
+                        Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
+                    }
 
                     if (!typeForObject) {
                         return false;

tests/cases/fourslash/completionListInObjectBindingPattern01.ts

@@ -10,4 +10,5 @@
 
 goTo.marker();
 verify.completionListContains("property1");
-verify.completionListContains("property2");
+verify.completionListContains("property2");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern02.ts

@@ -10,4 +10,5 @@
 
 goTo.marker();
 verify.completionListContains("property2");
-verify.not.completionListContains("property1");
+verify.not.completionListContains("property1");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern04.ts

@@ -10,4 +10,5 @@
 
 goTo.marker();
 verify.completionListContains("property1");
-verify.completionListContains("property2");
+verify.completionListContains("property2");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern05.ts

@@ -9,4 +9,5 @@
 ////var { property1/**/ } = foo;
 
 goTo.marker();
-verify.completionListContains("property1");
+verify.completionListContains("property1");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern07.ts

@@ -15,4 +15,5 @@
 goTo.marker();
 verify.completionListContains("propertyOfI_1");
 verify.completionListContains("propertyOfI_2");
-verify.not.completionListContains("property2");
+verify.not.completionListContains("property2");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern08.ts

@@ -15,4 +15,5 @@
 goTo.marker();
 verify.completionListContains("propertyOfI_2");
 verify.not.completionListContains("propertyOfI_1");
-verify.not.completionListContains("property2");
+verify.not.completionListContains("property2");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern09.ts

@@ -16,4 +16,5 @@ goTo.marker();
 verify.completionListContains("property2");
 verify.not.completionListContains("property1");
 verify.not.completionListContains("propertyOfI_2");
-verify.not.completionListContains("propertyOfI_1");
+verify.not.completionListContains("propertyOfI_1");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern10.ts

@@ -17,7 +17,9 @@ verify.completionListContains("property2");
 verify.not.completionListContains("property1");
 verify.not.completionListContains("propertyOfI_2");
 verify.not.completionListContains("propertyOfI_1");
+verify.not.completionListAllowsNewIdentifier();
 
 goTo.marker("2");
 verify.completionListContains("property1");
-verify.completionListContains("property2");
+verify.completionListContains("property2");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern11.ts

@@ -10,4 +10,5 @@
 goTo.marker("");
 verify.completionListContains("property2");
 verify.not.completionListContains("property1");
-verify.not.completionListContains("prop1");
+verify.not.completionListContains("prop1");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern12.ts

@@ -10,4 +10,5 @@
 
 goTo.marker("");
 verify.completionListContains("property2");
-verify.not.completionListContains("property1");
+verify.not.completionListContains("property1");
+verify.not.completionListAllowsNewIdentifier();

tests/cases/fourslash/completionListInObjectBindingPattern13.ts

@@ -16,4 +16,5 @@
 goTo.marker();
 verify.completionListContains("x");
 verify.completionListContains("y");
-verify.not.completionListContains("z");
+verify.not.completionListContains("z");
+verify.not.completionListAllowsNewIdentifier();