Show token hints for missing closing braces

src/compiler/parser.ts

@@ -5032,13 +5032,22 @@ namespace ts {
 
         function parseObjectLiteralExpression(): ObjectLiteralExpression {
             const node = <ObjectLiteralExpression>createNode(SyntaxKind.ObjectLiteralExpression);
+            const openBracePosition = scanner.getTokenPos();
             parseExpected(SyntaxKind.OpenBraceToken);
             if (scanner.hasPrecedingLineBreak()) {
                 node.multiLine = true;
             }
 
             node.properties = parseDelimitedList(ParsingContext.ObjectLiteralMembers, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
-            parseExpected(SyntaxKind.CloseBraceToken);
+            if (!parseExpected(SyntaxKind.CloseBraceToken)) {
+                const lastError = lastOrUndefined(parseDiagnostics);
+                if (lastError && lastError.code === Diagnostics._0_expected.code) {
+                    addRelatedInfo(
+                        lastError,
+                        createFileDiagnostic(sourceFile, openBracePosition, 1, Diagnostics.The_parser_expected_to_find_a_to_match_the_token_here)
+                    );
+                }
+            }
             return finishNode(node);
         }
 

tests/baselines/reference/missingCloseBraceInObjectLiteral.errors.txt

@@ -0,0 +1,12 @@
+tests/cases/compiler/missingCloseBraceInObjectLiteral.ts(5,1): error TS1005: '}' expected.
+
+
+==== tests/cases/compiler/missingCloseBraceInObjectLiteral.ts (1 errors) ====
+    var foo = {
+        a: 'a',
+        b: 'b',
+        c: 'c'
+
+
+!!! error TS1005: '}' expected.
+!!! related TS1007 tests/cases/compiler/missingCloseBraceInObjectLiteral.ts:1:11: The parser expected to find a '}' to match the '{' token here.

tests/baselines/reference/missingCloseBraceInObjectLiteral.js

@@ -0,0 +1,13 @@
+//// [missingCloseBraceInObjectLiteral.ts]
+var foo = {
+    a: 'a',
+    b: 'b',
+    c: 'c'
+
+
+//// [missingCloseBraceInObjectLiteral.js]
+var foo = {
+    a: 'a',
+    b: 'b',
+    c: 'c'
+};

tests/baselines/reference/missingCloseBraceInObjectLiteral.symbols

@@ -0,0 +1,13 @@
+=== tests/cases/compiler/missingCloseBraceInObjectLiteral.ts ===
+var foo = {
+>foo : Symbol(foo, Decl(missingCloseBraceInObjectLiteral.ts, 0, 3))
+
+    a: 'a',
+>a : Symbol(a, Decl(missingCloseBraceInObjectLiteral.ts, 0, 11))
+
+    b: 'b',
+>b : Symbol(b, Decl(missingCloseBraceInObjectLiteral.ts, 1, 11))
+
+    c: 'c'
+>c : Symbol(c, Decl(missingCloseBraceInObjectLiteral.ts, 2, 11))
+

tests/baselines/reference/missingCloseBraceInObjectLiteral.types

@@ -0,0 +1,17 @@
+=== tests/cases/compiler/missingCloseBraceInObjectLiteral.ts ===
+var foo = {
+>foo : { a: string; b: string; c: string; }
+>{    a: 'a',    b: 'b',    c: 'c' : { a: string; b: string; c: string; }
+
+    a: 'a',
+>a : string
+>'a' : "a"
+
+    b: 'b',
+>b : string
+>'b' : "b"
+
+    c: 'c'
+>c : string
+>'c' : "c"
+

tests/baselines/reference/nestedClassDeclaration.errors.txt

@@ -32,6 +32,7 @@ tests/cases/conformance/classes/nestedClassDeclaration.ts(17,1): error TS1128: D
 !!! error TS2304: Cannot find name 'C4'.
                  ~
 !!! error TS1005: ',' expected.
+!!! related TS1007 tests/cases/conformance/classes/nestedClassDeclaration.ts:14:9: The parser expected to find a '}' to match the '{' token here.
         }
     }
     ~

tests/baselines/reference/objectLiteralWithSemicolons4.errors.txt

@@ -9,4 +9,5 @@ tests/cases/compiler/objectLiteralWithSemicolons4.ts(3,1): error TS1005: ',' exp
 !!! error TS18004: No value exists in scope for the shorthand property 'a'. Either declare one or provide an initializer.
     ;
     ~
-!!! error TS1005: ',' expected.
+!!! error TS1005: ',' expected.
+!!! related TS1007 tests/cases/compiler/objectLiteralWithSemicolons4.ts:1:9: The parser expected to find a '}' to match the '{' token here.

tests/baselines/reference/objectSpreadNegativeParse.errors.txt

@@ -28,6 +28,7 @@ tests/cases/conformance/types/spread/objectSpreadNegativeParse.ts(4,20): error T
 !!! error TS2304: Cannot find name 'matchMedia'.
                                ~
 !!! error TS1005: ',' expected.
+!!! related TS1007 tests/cases/conformance/types/spread/objectSpreadNegativeParse.ts:3:10: The parser expected to find a '}' to match the '{' token here.
                                   ~
 !!! error TS1128: Declaration or statement expected.
     let o10 = { ...get x() { return 12; }};

tests/baselines/reference/parseErrorIncorrectReturnToken.errors.txt

@@ -25,6 +25,7 @@ tests/cases/compiler/parseErrorIncorrectReturnToken.ts(12,1): error TS1128: Decl
         m(n: number) => string {
                      ~~
 !!! error TS1005: '{' expected.
+!!! related TS1007 tests/cases/compiler/parseErrorIncorrectReturnToken.ts:8:9: The parser expected to find a '}' to match the '{' token here.
                         ~~~~~~
 !!! error TS2693: 'string' only refers to a type, but is being used as a value here.
                                ~

tests/baselines/reference/parserErrorRecovery_ObjectLiteral2.errors.txt

@@ -14,4 +14,5 @@ tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserEr
           ~
 !!! error TS1005: ':' expected.
 
-!!! error TS1005: '}' expected.
+!!! error TS1005: '}' expected.
+!!! related TS1007 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserErrorRecovery_ObjectLiteral2.ts:1:9: The parser expected to find a '}' to match the '{' token here.

tests/baselines/reference/parserErrorRecovery_ObjectLiteral3.errors.txt

@@ -11,4 +11,5 @@ tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserEr
           ~
 !!! error TS1005: ':' expected.
 
-!!! error TS1005: '}' expected.
+!!! error TS1005: '}' expected.
+!!! related TS1007 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserErrorRecovery_ObjectLiteral3.ts:1:9: The parser expected to find a '}' to match the '{' token here.

tests/baselines/reference/parserErrorRecovery_ObjectLiteral4.errors.txt

@@ -11,4 +11,5 @@ tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserEr
           ~
 !!! error TS1005: ':' expected.
 
-!!! error TS1005: '}' expected.
+!!! error TS1005: '}' expected.
+!!! related TS1007 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserErrorRecovery_ObjectLiteral4.ts:1:9: The parser expected to find a '}' to match the '{' token here.

tests/baselines/reference/parserErrorRecovery_ObjectLiteral5.errors.txt

@@ -8,4 +8,5 @@ tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserEr
           ~
 !!! error TS1005: ':' expected.
 
-!!! error TS1005: '}' expected.
+!!! error TS1005: '}' expected.
+!!! related TS1007 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ObjectLiterals/parserErrorRecovery_ObjectLiteral5.ts:1:9: The parser expected to find a '}' to match the '{' token here.

tests/cases/compiler/missingCloseBraceInObjectLiteral.ts

@@ -0,0 +1,4 @@
+var foo = {
+    a: 'a',
+    b: 'b',
+    c: 'c'