From 58ecfeb81501020222bbdcd958d2183560581fda Mon Sep 17 00:00:00 2001
From: Jeremy Ashkenas <jashkenas@gmail.com>
Date: Thu, 17 Dec 2009 20:59:19 -0500
Subject: [PATCH] added exponential and hex numbers

---
 TODO                       | 6 ++++++
 examples/code.cs           | 4 +++-
 lib/coffee_script/lexer.rb | 5 ++---
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/TODO b/TODO
index 93dbd7f7..3eedb434 100644
--- a/TODO
+++ b/TODO
@@ -1,5 +1,11 @@
 TODO:
 
+* Add TextMate syntax highlighter to the download.
+
+* Code Cleanup.
+
+* Add JS-style exponential number literals.
+
 * Is it possible to close blocks (functions, ifs, trys) without an explicit
   block delimiter or significant whitespace?
   
diff --git a/examples/code.cs b/examples/code.cs
index aa497f1e..67899925 100644
--- a/examples/code.cs
+++ b/examples/code.cs
@@ -19,7 +19,9 @@ spaced_out_multiline_object: {
 
   pi: 3.14159
 
-  list: [1, 2, 3, 4]
+  a_googol: 1e100
+
+  list: [-1, 0, 1, 2, 3, 4]
 
   regex: /match[ing](every|thing|\/)/gi
 
diff --git a/lib/coffee_script/lexer.rb b/lib/coffee_script/lexer.rb
index 17b2d486..41bec240 100644
--- a/lib/coffee_script/lexer.rb
+++ b/lib/coffee_script/lexer.rb
@@ -11,7 +11,7 @@ class Lexer
                 "super"]
 
   IDENTIFIER = /\A([a-zA-Z$_]\w*)/
-  NUMBER     = /\A([0-9]+(\.[0-9]+)?)/
+  NUMBER     = /\A\b((0(x|X)[0-9a-fA-F]+)|([0-9]+(\.[0-9]+)?(e[+\-]?[0-9]+)?))\b/i
   STRING     = /\A("(.*?)[^\\]"|'(.*?)[^\\]')/m
   JS         = /\A(`(.*?)`)/
   OPERATOR   = /\A([+\*&|\/\-%=<>]+)/
@@ -65,8 +65,7 @@ class Lexer
 
   def number_token
     return false unless number = @chunk[NUMBER, 1]
-    float = number.include?('.')
-    token(:NUMBER, float ? number.to_f : number.to_i)
+    token(:NUMBER, number)
     @i += number.length
   end