From c6149370b05d6e775022501a607055c44b01cf5a Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Fri, 5 Feb 2021 21:43:15 +0900
Subject: Refactor method overriding.

* Use `class_eval` instead of `instance_eval`.
* Reduce `class_eval` calls
* define `Numeric#i`
* undefine `Complex#i`
---
 mrbgems/mruby-complex/mrblib/complex.rb | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'mrbgems/mruby-complex')

diff --git a/mrbgems/mruby-complex/mrblib/complex.rb b/mrbgems/mruby-complex/mrblib/complex.rb
index 26a3b206f..f54151c7b 100644
--- a/mrbgems/mruby-complex/mrblib/complex.rb
+++ b/mrbgems/mruby-complex/mrblib/complex.rb
@@ -109,8 +109,8 @@ class Complex < Numeric
   alias_method :imag, :imaginary
 
   [Integer, Float].each do |cls|
-    [:+, :-, :*, :/, :==].each do |op|
-      cls.instance_eval do
+    cls.class_eval do
+      [:+, :-, :*, :/, :==].each do |op|
         original_operator_name = :"__original_operator_#{op}_complex"
         alias_method original_operator_name, op
         define_method op do |rhs|
@@ -123,4 +123,10 @@ class Complex < Numeric
       end
     end
   end
+  Numeric.class_eval do
+    def i
+      Complex(0, self)
+    end
+  end
+  undef i
 end
-- 
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