From 211792757cf8cb8529f99122efa52f5f5d558132 Mon Sep 17 00:00:00 2001
From: Mihai Bazon <mihai@bazon.net>
Date: Tue, 2 Oct 2012 12:45:17 +0300
Subject: [PATCH] more constant folding (for names defined with `const`)

---
 lib/compress.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/compress.js b/lib/compress.js
index 86d1ce7c..a6edf413 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -582,6 +582,16 @@ merge(Compressor.prototype, {
                 ? ev(this.consequent)
                 : ev(this.alternative);
         });
+        def(AST_SymbolRef, function(){
+            var d = this.definition();
+            if (d && d.constant) {
+                var orig = d.orig[0];
+                if (orig) orig = orig.init[0];
+                orig = orig && orig.value;
+                if (orig) return ev(orig);
+            }
+            throw def;
+        });
     })(function(node, func){
         node.DEFMETHOD("_eval", func);
     });
-- 
2.34.1