From a9511dfbe5c0d96d8cacb87582aa9a19737bbb98 Mon Sep 17 00:00:00 2001
From: Mihai Bazon <mihai@bazon.net>
Date: Thu, 9 May 2013 08:58:47 +0300
Subject: [PATCH] Use the negation hack rather than parens for a toplevel
 function expression call

(only in !beautify mode)
---
 lib/output.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/output.js b/lib/output.js
index defd0215..a13c92ea 100644
--- a/lib/output.js
+++ b/lib/output.js
@@ -351,7 +351,9 @@ function OutputStream(options) {
     AST_Node.DEFMETHOD("print", function(stream, force_parens){
         var self = this, generator = self._codegen;
         stream.push_node(self);
-        if (force_parens || self.needs_parens(stream)) {
+        var needs_parens = self.needs_parens(stream);
+        var fc = self instanceof AST_Function && !stream.option("beautify");
+        if (force_parens || (needs_parens && !fc)) {
             stream.with_parens(function(){
                 self.add_comments(stream);
                 self.add_source_map(stream);
@@ -359,6 +361,7 @@ function OutputStream(options) {
             });
         } else {
             self.add_comments(stream);
+            if (needs_parens && fc) stream.print("!");
             self.add_source_map(stream);
             generator(self, stream);
         }
-- 
2.34.1