jscript: Allow trailing comma in object literals.

dlls/jscript/parser.y

@@ -778,6 +778,14 @@ ObjectLiteral
         : '{' '}'               { $$ = new_prop_and_value_expression(ctx, NULL); }
         | '{' PropertyNameAndValueList '}'
                                 { $$ = new_prop_and_value_expression(ctx, $2); }
+        | '{' PropertyNameAndValueList ',' '}'
+        {
+            if(ctx->script->version < 2) {
+                WARN("Trailing comma in object literal is illegal in legacy mode.\n");
+                YYABORT;
+            }
+            $$ = new_prop_and_value_expression(ctx, $2);
+        }
 
 /* ECMA-262 3rd Edition    11.1.5 */
 PropertyNameAndValueList

dlls/jscript/tests/lang.js

@@ -480,6 +480,20 @@ ok(obj3.prop1 === 1, "obj3.prop1 is not 1");
 ok(obj3.prop2 === "boolean", "obj3.prop2 is not \"boolean\"");
 ok(obj3.constructor === Object, "unexpected obj3.constructor");
 
+if(invokeVersion >= 2) {
+    eval("tmp = {prop: 'value',}");
+    ok(tmp.prop === "value", "tmp.prop = " + tmp.prop);
+    eval("tmp = {prop: 'value',second:2,}");
+    ok(tmp.prop === "value", "tmp.prop = " + tmp.prop);
+}else {
+    try {
+        eval("tmp = {prop: 'value',}");
+    }catch(e) {
+        tmp = true;
+    }
+    ok(tmp === true, "exception not fired");
+}
+
 {
     var blockVar = 1;
     blockVar = 2;