From: "banister (john mair)" <jrmair@...>
Date: 2013-02-15T06:05:26+09:00
Subject: [ruby-core:52266] [ruby-trunk - Bug #7836] Need a way to get Method and UnboundMethod objects to methods overridden by prepended modules


Issue #7836 has been updated by banister (john mair).


@ marcandre. Another possible approach is to provide `UnboundMethod#super`. We do something similar in our Method wrapper for Pry: https://github.com/pry/pry/blob/master/lib/pry/method.rb#L394-L402

While we're at it, other useful methods for `Method/UnboundMethod` could be private?, public?, aliases, singleton? :) but that could be asking for too much ;)

John
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Bug #7836: Need a way to get Method and UnboundMethod objects to methods overridden by prepended modules
https://bugs.ruby-lang.org/issues/7836#change-36297

Author: banister (john mair)
Status: Open
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: 
Target version: 
ruby -v: 2.0.0dev


=begin
See the following code:

  module P
    def hello
      puts "from P"
      super
    end
  end

  class A
    def hello
      puts 'from A'
    end

    prepend P
  end

  A.instance_method(:hello).source_location == P.instance_method(:hello).source_location  #=> true

== Discussion

Since (({A.instance_method(:hello)})) effectively returns (({P.instance_method(:hello)})) it is impossible to get an (({UnboundMethod})) object to the original (({A#hello})) method.

Tools like ((<[Pry]|URL:http://pryrepl.org>)) need to access (({UnboundMethod})) objects to every active method in the system for debugging purposes.

== Possible solution

Simply allow (({instance_method()})) to take a second boolean parameter, indicating whether methods injected by prepended modules are to be included, it would default to true:

example:

  A.instance_method(:hello) #=> same as P#hello
  A.instance_method(:hello, false) #=> return strictly A#hello

=end



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