From a6569ad637e46eeb93bd28fe1ffe3c173dc43903 Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Sat, 6 Feb 2010 03:02:40 +0000
Subject: * lib/delegate.rb (Delegator#method_missing),  
 (Delegator.delegating_block): don't hide backtrace from   __getobj__ and
 reduced exception messages when $DEBUG.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26592 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/delegate.rb | 24 ++++++++----------------
 1 file changed, 8 insertions(+), 16 deletions(-)

(limited to 'lib/delegate.rb')

diff --git a/lib/delegate.rb b/lib/delegate.rb
index 0d5dc23b6e..2891167fa8 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -139,18 +139,11 @@ class Delegator < BasicObject
 
   # Handles the magic of delegation through \_\_getobj\_\_.
   def method_missing(m, *args, &block)
+    target = self.__getobj__
     begin
-      target = self.__getobj__
-      unless target.respond_to?(m)
-        super(m, *args, &block)
-      else
-        target.__send__(m, *args, &block)
-      end
-    rescue ::Exception
-      if i = $@.index{|s| %r"\A#{Regexp.quote(__FILE__)}:\d+:in `method_missing'\z"o =~ s}
-        $@[0..i] = []
-      end
-      ::Kernel::raise
+      target.respond_to?(m) ? target.__send__(m, *args, &block) : super(m, *args, &block)
+    ensure
+      $@.delete_if {|t| %r"\A#{Regexp.quote(__FILE__)}:#{__LINE__-2}:"o =~ t} if $@
     end
   end
 
@@ -267,12 +260,11 @@ end
 # :stopdoc:
 def Delegator.delegating_block(mid)
   lambda do |*args, &block|
+    target = self.__getobj__
     begin
-      __getobj__.__send__(mid, *args, &block)
-    rescue
-      re = /\A#{Regexp.quote(__FILE__)}:#{__LINE__-2}:/o
-      $!.backtrace.delete_if {|t| re =~ t}
-      raise
+      target.__send__(mid, *args, &block)
+    ensure
+      $@.delete_if {|t| /\A#{Regexp.quote(__FILE__)}:#{__LINE__-2}:/o =~ t} if $@
     end
   end
 end
-- 
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