Ruby

Refinements are enabled with various contexts and methods.

• #send
• #__send__
• Symbol#to_proc
• #to_s
  • called by "#{hoge}"
• #to_proc
  • call to &:hoge
  • since ruby 2.6

I want to enable refinements for #respond_to?
I want to use it in the following case.

module StringEx refine String do def twice self + self end end end class X using StringEx def meth a a.twice if a.respond_to? :twice end end class Y def twice 42 + 42 end end x = X.new p x.meth Y.new # => 84 p x.meth "homu" # => "homuhomu" p x.meth 42 # nil 

pull request : https://github.com/ruby/ruby/pull/2020