From 2231d67cef5ab10d91a3ec6c0cf7f860c8782ad5 Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Thu, 31 Dec 2009 13:26:38 -0500
Subject: [PATCH] making assignment token detection a regex like all the others

---
 lib/coffee_script/lexer.rb | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/lib/coffee_script/lexer.rb b/lib/coffee_script/lexer.rb
index 56f45c8c..3fb03c7b 100644
--- a/lib/coffee_script/lexer.rb
+++ b/lib/coffee_script/lexer.rb
@@ -29,6 +29,7 @@ module CoffeeScript
     REGEX      = /\A(\/(.*?)[^\\]\/[imgy]{0,4})/
     MULTI_DENT = /\A((\n([ \t]*)?)+)/
     LAST_DENT  = /\n([ \t]*)/
+    ASSIGNMENT = /\A(:|=)\Z/
 
     # Token cleaning regexes.
     JS_CLEANER = /(\A`|`\Z)/
@@ -36,9 +37,6 @@ module CoffeeScript
     COMMENT_CLEANER = /(^\s*#|\n\s*$)/
     NO_NEWLINE = /\A([+\*&|\/\-%=<>:!.\\][<>=&|]*|and|or|is|isnt|not|delete|typeof|instanceof)\Z/
 
-    # Assignment tokens.
-    ASSIGN     = [':', '=']
-
     # Scan by attempting to match tokens one character at a time. Slow and steady.
     def tokenize(code)
       @code = code.chomp  # Cleanup code by remove extra line breaks
@@ -174,7 +172,7 @@ module CoffeeScript
       value = @chunk[OPERATOR, 1]
       tag_parameters if value && value.match(CODE)
       value ||= @chunk[0,1]
-      tag = ASSIGN.include?(value) ? :ASSIGN : value
+      tag = value.match(ASSIGNMENT) ? :ASSIGN : value
       token(tag, value)
       @i += value.length
     end