diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts index fcea7adcfff..6a25699f0b9 100644 --- a/src/compiler/parser.ts +++ b/src/compiler/parser.ts @@ -1639,12 +1639,7 @@ module ts { function parseTupleType(): TupleTypeNode { var node = createNode(SyntaxKind.TupleType); - var startTokenPos = scanner.getTokenPos(); - var startErrorCount = file.parseDiagnostics.length; node.elementTypes = parseBracketedList(ParsingContext.TupleElementTypes, parseType, SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken); - if (!node.elementTypes.length && file.parseDiagnostics.length === startErrorCount) { - grammarErrorAtPos(startTokenPos, scanner.getStartPos() - startTokenPos, Diagnostics.A_tuple_type_element_list_cannot_be_empty); - } return finishNode(node); } @@ -4422,7 +4417,14 @@ module ts { } function visitTupleType(node: TupleTypeNode) { - checkForTrailingComma(node.elementTypes); + checkForTrailingComma(node.elementTypes) || + checkForAtLeastOneType(node); + } + + function checkForAtLeastOneType(node: TupleTypeNode): boolean { + if (node.elementTypes.length === 0) { + return grammarErrorOnNode(node, Diagnostics.A_tuple_type_element_list_cannot_be_empty) + } } function visitTypeReference(node: TypeReferenceNode) {