From 9970cb0124aa464cc0e7f8f063754bb0cfa83c22 Mon Sep 17 00:00:00 2001
From: cloudhead <self@cloudhead.net>
Date: Thu, 25 Feb 2010 22:32:13 -0500
Subject: [PATCH] parse IE's alpha()

---
 lib/less/adapters/server.js |  2 +-
 lib/less/parser.js          | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/lib/less/adapters/server.js b/lib/less/adapters/server.js
index b77de3a..a17dce6 100644
--- a/lib/less/adapters/server.js
+++ b/lib/less/adapters/server.js
@@ -9,7 +9,7 @@ process.mixin(less, require('less/parser'));
 ['color',    'directive', 'operation',  'dimension',
  'keyword',  'variable',  'ruleset',    'element',
  'selector', 'quoted',    'expression', 'rule',
- 'call',     'url'
+ 'call',     'url',       'alpha'
 ].forEach(function (n) {
     process.mixin(less.parser, require(path.join('less', 'node', n)));
 });
diff --git a/lib/less/parser.js b/lib/less/parser.js
index ab12923..0bbd2c1 100644
--- a/lib/less/parser.js
+++ b/lib/less/parser.js
@@ -295,6 +295,15 @@ less.parser = {
                 }
             }
         },
+        alpha: function alpha() {
+            var value;
+
+            if (! $(/alpha\(opacity=/g)) return;
+            if (value = $(/[0-9]+/g) || $(this.entities.variable)) {
+                if (! $(')')) throw new(Error)("missing closing ) for alpha()");
+                return new(node.Alpha)(value);
+            }
+        },
         combinator: function combinator() {
             var match;
             if (match = $(/[+>~]/g) || $('&') || $(/::/g)) {
@@ -404,6 +413,8 @@ less.parser = {
                 expressions.push(e);
                 if (! $(',')) { break }
             }
+
+            if (expressions.length === 0 && (e = $(this.alpha))) { expressions.push(e) }
             important = $(/!\s*important/g);
 
             if (expressions.length > 0) {