microsoft
diff --git a/‎src/compiler/checker.ts
Copy file name to clipboard
+148-30Lines changed: 148 additions & 30 deletions b/‎src/compiler/checker.ts
Copy file name to clipboard
+148-30Lines changed: 148 additions & 30 deletions
diff --git a/‎src/compiler/emitter.ts
Copy file name to clipboard
+1Lines changed: 1 addition & 0 deletions b/‎src/compiler/emitter.ts
Copy file name to clipboard
+1Lines changed: 1 addition & 0 deletions
diff --git a/‎src/compiler/transformers/declarations.ts
Copy file name to clipboard
+3-1Lines changed: 3 additions & 1 deletion b/‎src/compiler/transformers/declarations.ts
Copy file name to clipboard
+3-1Lines changed: 3 additions & 1 deletion
diff --git a/‎src/compiler/types.ts
Copy file name to clipboard
+2-1Lines changed: 2 additions & 1 deletion b/‎src/compiler/types.ts
Copy file name to clipboard
+2-1Lines changed: 2 additions & 1 deletion
diff --git a/‎tests/baselines/reference/ES5SymbolProperty2.types
Copy file name to clipboard
+4-4Lines changed: 4 additions & 4 deletions b/‎tests/baselines/reference/ES5SymbolProperty2.types
Copy file name to clipboard
+4-4Lines changed: 4 additions & 4 deletions
diff --git a/‎tests/baselines/reference/ES5SymbolProperty3.types
Copy file name to clipboard
+2-1Lines changed: 2 additions & 1 deletion b/‎tests/baselines/reference/ES5SymbolProperty3.types
Copy file name to clipboard
+2-1Lines changed: 2 additions & 1 deletion
diff --git a/‎tests/baselines/reference/ES5SymbolProperty4.types
Copy file name to clipboard
+2-1Lines changed: 2 additions & 1 deletion b/‎tests/baselines/reference/ES5SymbolProperty4.types
Copy file name to clipboard
+2-1Lines changed: 2 additions & 1 deletion
diff --git a/‎tests/baselines/reference/ES5SymbolProperty5.errors.txt
Copy file name to clipboard
+13Lines changed: 13 additions & 0 deletions b/‎tests/baselines/reference/ES5SymbolProperty5.errors.txt
Copy file name to clipboard
+13Lines changed: 13 additions & 0 deletions
diff --git a/‎tests/baselines/reference/ES5SymbolProperty5.types
Copy file name to clipboard
+4-2Lines changed: 4 additions & 2 deletions b/‎tests/baselines/reference/ES5SymbolProperty5.types
Copy file name to clipboard
+4-2Lines changed: 4 additions & 2 deletions
diff --git a/‎tests/baselines/reference/ES5SymbolProperty6.types
Copy file name to clipboard
+2-2Lines changed: 2 additions & 2 deletions b/‎tests/baselines/reference/ES5SymbolProperty6.types
Copy file name to clipboard
+2-2Lines changed: 2 additions & 2 deletions
@@ -1167,6 +1167,7 @@ export const notImplementedResolver: EmitResolver = {
     getDeclarationStatementsForSourceFile: notImplemented,
     isImportRequiredByAugmentation: notImplemented,
     isDefinitelyReferenceToGlobalSymbolObject: notImplemented,
+    createLateBoundIndexSignatures: notImplemented,
 };
 
 const enum PipelinePhase {
 
@@ -12,6 +12,7 @@ import {
     canHaveModifiers,
     canProduceDiagnostics,
     ClassDeclaration,
+    ClassElement,
     compact,
     concatenate,
     ConditionalTypeNode,
@@ -1652,7 +1653,8 @@ export function transformDeclarations(context: TransformationContext): Transform
                         /*initializer*/ undefined,
                     ),
                 ] : undefined;
-                const memberNodes = concatenate(concatenate(privateIdentifier, parameterProperties), visitNodes(input.members, visitDeclarationSubtree, isClassElement));
+                const lateIndexes = resolver.createLateBoundIndexSignatures(input, enclosingDeclaration, declarationEmitNodeBuilderFlags, declarationEmitInternalNodeBuilderFlags, symbolTracker);
+                const memberNodes = concatenate(concatenate(concatenate<ClassElement>(privateIdentifier, lateIndexes), parameterProperties), visitNodes(input.members, visitDeclarationSubtree, isClassElement));
                 const members = factory.createNodeArray(memberNodes);
 
                 const extendsClause = getEffectiveBaseTypeNode(input);
 
@@ -5048,7 +5048,7 @@ export interface TypeChecker {
     /** @internal */ getTypeOfPropertyOfType(type: Type, propertyName: string): Type | undefined;
     getIndexInfoOfType(type: Type, kind: IndexKind): IndexInfo | undefined;
     getIndexInfosOfType(type: Type): readonly IndexInfo[];
-    getIndexInfosOfIndexSymbol: (indexSymbol: Symbol) => IndexInfo[];
+    getIndexInfosOfIndexSymbol: (indexSymbol: Symbol, siblingSymbols?: Symbol[] | undefined) => IndexInfo[];
     getSignaturesOfType(type: Type, kind: SignatureKind): readonly Signature[];
     getIndexTypeOfType(type: Type, kind: IndexKind): Type | undefined;
     /** @internal */ getIndexType(type: Type): Type;
@@ -5867,6 +5867,7 @@ export interface EmitResolver {
     getDeclarationStatementsForSourceFile(node: SourceFile, flags: NodeBuilderFlags, internalFlags: InternalNodeBuilderFlags, tracker: SymbolTracker): Statement[] | undefined;
     isImportRequiredByAugmentation(decl: ImportDeclaration): boolean;
     isDefinitelyReferenceToGlobalSymbolObject(node: Node): boolean;
+    createLateBoundIndexSignatures(cls: ClassLikeDeclaration, enclosingDeclaration: Node, flags: NodeBuilderFlags, internalFlags: InternalNodeBuilderFlags, tracker: SymbolTracker): IndexSignatureDeclaration[] | undefined;
 }
 
 // dprint-ignore
 
@@ -24,8 +24,8 @@ module M {
 >         : ^^^
     }
     (new C)[Symbol.iterator];
->(new C)[Symbol.iterator] : any
->                         : ^^^
+>(new C)[Symbol.iterator] : () => void
+>                         : ^^^^^^^^^^
 >(new C) : C
 >        : ^
 >new C : C
@@ -41,8 +41,8 @@ module M {
 }
 
 (new M.C)[Symbol.iterator];
->(new M.C)[Symbol.iterator] : any
->                           : ^^^
+>(new M.C)[Symbol.iterator] : () => void
+>                           : ^^^^^^^^^^
 >(new M.C) : M.C
 >          : ^^^
 >new M.C : M.C
 
@@ -19,7 +19,8 @@ class C {
 }
 
 (new C)[Symbol.iterator]
->(new C)[Symbol.iterator] : error
+>(new C)[Symbol.iterator] : () => void
+>                         : ^^^^^^^^^^
 >(new C) : C
 >        : ^
 >new C : C
 
@@ -23,7 +23,8 @@ class C {
 }
 
 (new C)[Symbol.iterator]
->(new C)[Symbol.iterator] : error
+>(new C)[Symbol.iterator] : () => void
+>                         : ^^^^^^^^^^
 >(new C) : C
 >        : ^
 >new C : C
 
@@ -0,0 +1,13 @@
+ES5SymbolProperty5.ts(7,26): error TS2554: Expected 0 arguments, but got 1.
+
+
+==== ES5SymbolProperty5.ts (1 errors) ====
+    var Symbol: { iterator: symbol };
+    
+    class C {
+        [Symbol.iterator]() { }
+    }
+    
+    (new C)[Symbol.iterator](0) // Should error
+                             ~
+!!! error TS2554: Expected 0 arguments, but got 1.
@@ -23,8 +23,10 @@ class C {
 }
 
 (new C)[Symbol.iterator](0) // Should error
->(new C)[Symbol.iterator](0) : error
->(new C)[Symbol.iterator] : error
+>(new C)[Symbol.iterator](0) : void
+>                            : ^^^^
+>(new C)[Symbol.iterator] : () => void
+>                         : ^^^^^^^^^^
 >(new C) : C
 >        : ^
 >new C : C
 
@@ -17,8 +17,8 @@ class C {
 }
 
 (new C)[Symbol.iterator]
->(new C)[Symbol.iterator] : any
->                         : ^^^
+>(new C)[Symbol.iterator] : () => void
+>                         : ^^^^^^^^^^
 >(new C) : C
 >        : ^
 >new C : C
Original file line number	Diff line number	Diff line change
`@@ -19,7 +19,8 @@ class C {`
`19`	`19`	`}`
`20`	`20`
`21`	`21`	`(new C)[Symbol.iterator]`
`22`		`->(new C)[Symbol.iterator] : error`
	`22`	`+>(new C)[Symbol.iterator] : () => void`
	`23`	`+> : ^^^^^^^^^^`
`23`	`24`	`>(new C) : C`
`24`	`25`	`> : ^`
`25`	`26`	`>new C : C`
Original file line number	Diff line number	Diff line change
`@@ -23,7 +23,8 @@ class C {`
`23`	`23`	`}`
`24`	`24`
`25`	`25`	`(new C)[Symbol.iterator]`
`26`		`->(new C)[Symbol.iterator] : error`
	`26`	`+>(new C)[Symbol.iterator] : () => void`
	`27`	`+> : ^^^^^^^^^^`
`27`	`28`	`>(new C) : C`
`28`	`29`	`> : ^`
`29`	`30`	`>new C : C`