From fe9f3fdd200659e88ef72aab5198e552d138ea27 Mon Sep 17 00:00:00 2001
From: Tomoyuki Sahara <tsahara@iij.ad.jp>
Date: Tue, 3 Jun 2014 10:55:26 +0900
Subject: add 'String#%'.

---
 mrbgems/mruby-sprintf/mrblib/string.rb | 9 +++++++++
 mrbgems/mruby-sprintf/test/sprintf.rb  | 9 +++++++--
 2 files changed, 16 insertions(+), 2 deletions(-)
 create mode 100644 mrbgems/mruby-sprintf/mrblib/string.rb

diff --git a/mrbgems/mruby-sprintf/mrblib/string.rb b/mrbgems/mruby-sprintf/mrblib/string.rb
new file mode 100644
index 000000000..d7e55536a
--- /dev/null
+++ b/mrbgems/mruby-sprintf/mrblib/string.rb
@@ -0,0 +1,9 @@
+class String
+  def %(args)
+    if args.is_a? Array
+      sprintf(self, *args)
+    else
+      sprintf(self, args)
+    end
+  end
+end
diff --git a/mrbgems/mruby-sprintf/test/sprintf.rb b/mrbgems/mruby-sprintf/test/sprintf.rb
index 52e94fb83..7007df1fa 100644
--- a/mrbgems/mruby-sprintf/test/sprintf.rb
+++ b/mrbgems/mruby-sprintf/test/sprintf.rb
@@ -1,3 +1,8 @@
-##
-# Kernel#sprintf Kernel#format Test
+#assert('Kernel.sprintf') do
+#end
 
+assert('String#%') do
+  assert_equal "one=1", "one=%d" % 1
+  assert_equal "1 one 1.0", "%d %s %3.1f" % [ 1, "one", 1.01 ]
+  assert_equal "123 < 456", "%{num} < %<str>s" % { num: 123, str: "456" }
+end
-- 
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