Adding error message for empty tuple types.

Author: ahejlsberg

src/compiler/diagnosticInformationMap.generated.ts

@@ -106,6 +106,7 @@ module ts {
         An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: DiagnosticCategory.Error, key: "An object literal cannot have property and accessor with the same name." },
         An_export_assignment_cannot_have_modifiers: { code: 1120, category: DiagnosticCategory.Error, key: "An export assignment cannot have modifiers." },
         Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: DiagnosticCategory.Error, key: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: DiagnosticCategory.Error, key: "A tuple type element list cannot be empty." },
         Duplicate_identifier_0: { code: 2000, category: DiagnosticCategory.Error, key: "Duplicate identifier '{0}'." },
         Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 2018, category: DiagnosticCategory.Error, key: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
         Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 2019, category: DiagnosticCategory.Error, key: "Implements clause of exported class '{0}' has or is using private name '{1}'." },

src/compiler/diagnosticMessages.json

@@ -416,6 +416,10 @@
         "category": "Error",
         "code": 1121
     },
+    "A tuple type element list cannot be empty.": {
+        "category": "Error",
+        "code": 1122
+    },
     "Duplicate identifier '{0}'.": {
         "category": "Error",
         "code": 2000
@@ -1042,7 +1046,7 @@
     "File change detected. Compiling...": {
         "category": "Message",
         "code": 6032
-    },
+    },
     "STRING": {
         "category": "Message",
         "code": 6033
@@ -1078,8 +1082,8 @@
     "Additional locations:": {
         "category": "Message",
         "code": 6041
-    },
-    "Compilation complete. Watching for file changes.": {
+    },
+    "Compilation complete. Watching for file changes.": {
         "category": "Message",
         "code": 6042
     },

src/compiler/parser.ts

@@ -1402,7 +1402,7 @@ module ts {
             var startErrorCount = file.syntacticErrors.length;
             node.elementTypes = parseBracketedList(ParsingContext.TupleElementTypes, parseType, SyntaxKind.OpenBracketToken, SyntaxKind.CloseBracketToken);
             if (!node.elementTypes.length && file.syntacticErrors.length === startErrorCount) {
-                grammarErrorAtPos(startTokenPos, scanner.getStartPos() - startTokenPos, Diagnostics.Type_argument_list_cannot_be_empty);
+                grammarErrorAtPos(startTokenPos, scanner.getStartPos() - startTokenPos, Diagnostics.A_tuple_type_element_list_cannot_be_empty);
             }
             return finishNode(node);
         }