From 2120de36af601277daa232ec7f72a2c48d491437 Mon Sep 17 00:00:00 2001
From: David Majda <david@majda.cz>
Date: Tue, 28 Sep 2010 21:02:11 +0200
Subject: [PATCH] Behave like CommonJS module in CommonJS context

---
 src/peg.js   | 10 +++++++---
 src/utils.js |  6 ++++++
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/peg.js b/src/peg.js
index 7958148..83ca2cf 100644
--- a/src/peg.js
+++ b/src/peg.js
@@ -1,4 +1,4 @@
-(function(global) {
+(function() {
 
 var undefined;
 
@@ -32,6 +32,10 @@ PEG.GrammarError.prototype = Error.prototype;
 // @include "parser.js"
 // @include "compiler.js"
 
-global.PEG = PEG;
+if (typeof exports !== "undefined") { // Looks like we're in CommonJS environment.
+  extend(exports, PEG);
+} else {                              // Okay, assume this is a browser.
+  window.PEG = PEG;
+}
 
-})(this);
+})();
diff --git a/src/utils.js b/src/utils.js
index 7afdf88..14f1018 100644
--- a/src/utils.js
+++ b/src/utils.js
@@ -1,3 +1,9 @@
+function extend(target, source) {
+  for (var key in source) {
+    target[key] = source[key];
+  }
+}
+
 function contains(array, value) {
   /*
    * Stupid IE does not have Array.prototype.indexOf, otherwise this function