From 7802f01d4fcb9f237cac480364a09f788265fbbd Mon Sep 17 00:00:00 2001
From: nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Fri, 6 Jan 2017 03:11:45 +0000
Subject: [PATCH] prelude.rb: Binding#irb [ci skip]

* prelude.rb (Binding#irb): [EXPERIMENTAL] automatically require
  irb and run.  [ruby-core:78960] [Bug #13099]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57274 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 lib/irb.rb | 1 +
 prelude.rb | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/lib/irb.rb b/lib/irb.rb
index 676abe42cd..ca36acd569 100644
--- a/lib/irb.rb
+++ b/lib/irb.rb
@@ -708,6 +708,7 @@ end
 
 class Binding
   # :nodoc:
+  undef irb if method_defined?(:irb)
   def irb
     IRB.setup(eval("__FILE__"))
     IRB::Irb.new(IRB::WorkSpace.new(self)).run(IRB.conf)
diff --git a/prelude.rb b/prelude.rb
index 740aba5b79..231c64e95a 100644
--- a/prelude.rb
+++ b/prelude.rb
@@ -133,3 +133,10 @@ class IO
     __write_nonblock(buf, exception)
   end
 end
+
+class Binding
+  def irb
+    require 'irb'
+    irb
+  end
+end