From df529a83d6572ed5e06f7d2689ba6ace83699a41 Mon Sep 17 00:00:00 2001
From: Akira Yumiyama <yumiyama.akira@gmail.com>
Date: Wed, 8 May 2013 20:22:29 +0900
Subject: add $stdin $stdout $stderr STDIN STDOUT STDERR

---
 mrblib/io.rb | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/mrblib/io.rb b/mrblib/io.rb
index 37eaed4be..011f1dc21 100644
--- a/mrblib/io.rb
+++ b/mrblib/io.rb
@@ -278,3 +278,33 @@ class IO
 
   alias_method :to_i, :fileno
 end
+
+STDIN  = IO.open(0, "r")
+STDOUT = IO.open(1, "w")
+STDERR = IO.open(1, "w")
+
+$stdin  = STDIN
+$stdout = STDOUT
+$stderr = STDERR
+
+module Kernel
+  def print(*args)
+    STDOUT.print(*args)
+  end
+
+  def puts(*args)
+    STDOUT.puts(*args)
+  end
+
+  def printf(*args)
+    STDOUT.printf(*args)
+  end
+
+  def gets(*args)
+    STDIN.gets(*args)
+  end
+
+  def getc(*args)
+    STDIN.getc(*args)
+  end
+end
-- 
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