From: thorn0 <georgii.dolzhykov@stuzo.com>
Date: Sat, 18 Jan 2014 13:16:43 +0000 (+0200)
Subject: Advanced way to specify if a function call might have side effects. #400
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=252fc65558e40e5e0a451f8fe3f2d5ae7a639457;p=UglifyJS.git

Advanced way to specify if a function call might have side effects. #400
---

diff --git a/lib/compress.js b/lib/compress.js
index 4c4cf977..401a1c75 100644
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -896,6 +896,7 @@ merge(Compressor.prototype, {
         def(AST_Call, function(compressor){
             var pure = compressor.option("pure_funcs");
             if (!pure) return true;
+            if (typeof pure == "function") return pure(this);
             return pure.indexOf(this.expression.print_to_string()) < 0;
         });