From 1988110a284678a7068ed90eaef138371b619f44 Mon Sep 17 00:00:00 2001
From: David Majda <david@majda.cz>
Date: Wed, 21 Nov 2012 08:24:08 +0100
Subject: [PATCH] Fix code generated for classes starting with "\^"

Before this commit, incorrect regexps were produced for classes starting
with "\^". For example, this grammar:

  start = [\^a]

didn't match "a" because the generated regexp inside the parser was
/^[^a]/, not /^[\^a]/ as it should be.

This commit fixes the issue by escaping "^" in |quoteForRegexpClass|.

Fixes GH-125.
---
 lib/utils.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/utils.js b/lib/utils.js
index 564dedc..358bf0c 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -183,6 +183,7 @@ var utils = {
       .replace(/\\/g, '\\\\')  // backslash
       .replace(/\//g, '\\/')   // closing slash
       .replace(/\]/g, '\\]')   // closing bracket
+      .replace(/^/g,  '\\^')   // caret
       .replace(/-/g,  '\\-')   // dash
       .replace(/\0/g, '\\0')   // null
       .replace(/\t/g, '\\t')   // horizontal tab