From 9af2bbffde2653237b36a06b005209be9f6cc1e6 Mon Sep 17 00:00:00 2001
From: Justin Lau <justin@tclau.com>
Date: Mon, 6 May 2013 02:45:41 +0800
Subject: [PATCH] Fixed dot properties not optimizing unicode identifiers.
 Signed-off-by: Justin Lau <justin@tclau.com>

---
 lib/compress.js | 4 ++--
 lib/parse.js    | 8 ++++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/compress.js b/lib/compress.js
index 623fe45e..992d78f8 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -1962,8 +1962,8 @@ merge(Compressor.prototype, {
         var prop = self.property;
         if (prop instanceof AST_String && compressor.option("properties")) {
             prop = prop.getValue();
-            if (is_identifier(prop)
-                || (compressor.option("screw_ie8") && /^[a-z_$][a-z0-9_$]*$/i.test(prop))) {
+            if (compressor.option("screw_ie8") && RESERVED_WORDS(prop)
+                || !(RESERVED_WORDS(prop)) && is_identifier_string(prop)) {
                 return make_node(AST_Dot, self, {
                     expression : self.expression,
                     property   : prop
diff --git a/lib/parse.js b/lib/parse.js
index da39b5b1..b3687201 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -167,6 +167,14 @@ function is_identifier_char(ch) {
     ;
 };
 
+function is_identifier_string(str){
+    for (var i = str.length; --i >= 0;) {
+        if (!is_identifier_char(str.charAt(i)))
+            return false;
+    }
+    return true;
+};
+
 function parse_js_number(num) {
     if (RE_HEX_NUMBER.test(num)) {
         return parseInt(num.substr(2), 16);
-- 
2.34.1