accept string literal as case labels

kazuho · kazuho · commit 5b40c150616f · 2012-04-11T17:01:07.000+09:00
diff --git a/lib/parser.js b/lib/parser.js
@@ -667,7 +667,8 @@ var Parser = exports.Parser = Class.extend({
 					if (! (labelExpr instanceof NullExpression
 						|| labelExpr instanceof BooleanLiteralExpression
 						|| labelExpr instanceof IntegerLiteralExpression
-						|| labelExpr instanceof NumberLiteralExpression)) {
+						|| labelExpr instanceof NumberLiteralExpression
+						|| labelExpr instanceof StringLiteralExpression)) {
 						this._newError("case label is not a constant");
 						return false;
 					}
