From 3a9caad8ebe63dfe2b8583c72fc5e275f13e25c3 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 20 Sep 2018 12:06:53 +0900
Subject: Move `Symbol#to_proc` to the core from `mruby-symbol-ext` gem.

Even though `Symbol#to_proc` is not included in ISO standard, the
`some_method(&:method_name)` is used very widely and convenient.
So we moved it to the core.
---
 mrbgems/mruby-symbol-ext/mrblib/symbol.rb | 6 ------
 mrbgems/mruby-symbol-ext/test/symbol.rb   | 4 ----
 mrblib/symbol.rb                          | 7 +++++++
 test/t/symbol.rb                          | 4 ++++
 4 files changed, 11 insertions(+), 10 deletions(-)
 create mode 100644 mrblib/symbol.rb

diff --git a/mrbgems/mruby-symbol-ext/mrblib/symbol.rb b/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
index 28cce3156..99fa275d5 100644
--- a/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
+++ b/mrbgems/mruby-symbol-ext/mrblib/symbol.rb
@@ -3,12 +3,6 @@ class Symbol
 
   alias intern to_sym
 
-  def to_proc
-    ->(obj,*args,&block) do
-      obj.__send__(self, *args, &block)
-    end
-  end
-
   ##
   # call-seq:
   #   sym.capitalize  -> symbol
diff --git a/mrbgems/mruby-symbol-ext/test/symbol.rb b/mrbgems/mruby-symbol-ext/test/symbol.rb
index 6070d1418..63c1bd826 100644
--- a/mrbgems/mruby-symbol-ext/test/symbol.rb
+++ b/mrbgems/mruby-symbol-ext/test/symbol.rb
@@ -1,10 +1,6 @@
 ##
 # Symbol(Ext) Test
 
-assert('Symbol#to_proc') do
-  assert_equal 5, :abs.to_proc[-5]
-end
-
 assert('Symbol.all_symbols') do
   foo = [:__symbol_test_1, :__symbol_test_2, :__symbol_test_3].sort
   symbols = Symbol.all_symbols.select{|sym|sym.to_s.include? '__symbol_test'}.sort
diff --git a/mrblib/symbol.rb b/mrblib/symbol.rb
new file mode 100644
index 000000000..9c981dd9e
--- /dev/null
+++ b/mrblib/symbol.rb
@@ -0,0 +1,7 @@
+class Symbol
+  def to_proc
+    ->(obj,*args,&block) do
+      obj.__send__(self, *args, &block)
+    end
+  end
+end
diff --git a/test/t/symbol.rb b/test/t/symbol.rb
index 9059f45c2..fdce0f378 100644
--- a/test/t/symbol.rb
+++ b/test/t/symbol.rb
@@ -28,3 +28,7 @@ end
 assert('Symbol#to_sym', '15.2.11.3.4') do
   assert_equal :abc, :abc.to_sym
 end
+
+assert('Symbol#to_proc') do
+  assert_equal 5, :abs.to_proc[-5]
+end
-- 
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