From: Yukihiro Matsumoto <matz@...>
Date: 2011-07-09T23:27:46+09:00
Subject: [ruby-core:37925] [Ruby 1.9 - Feature #5005] Provide convenient access to original methods


Issue #5005 has been updated by Yukihiro Matsumoto.


The idea to address the issue is the "prepend" feature planned for Ruby 2.0.

class Original
  def any_method
    ...
  end
end

module Modifier
  def any_method
    #custom code
    super # call the original any_method, passing *args
    #custom code
  end
end

# reopen class
class Original
  prepend Modifier
end

The prepend method pushes a module in front of a class so that super calls the original method.

matz.

----------------------------------------
Feature #5005: Provide convenient access to original methods
http://redmine.ruby-lang.org/issues/5005

Author: Lazaridis Ilias
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: 2.0


The languag allows a class to be "reopened", thus it's behaviour can be redefined:

class String
  def any_method
    #custom code
  end
end

the original method can be called, using this construct:

class String
  alias_method :original_any_method, :any_method
  def any_method(*args)
    #custom code
    original_any_method(*args)
    #custom code
  end
end

In order to make this more convenient, the following construct could be provided:

class String
  def any_method(*args)
    #custom code
    original # call the original String#any_method, passing *args (similar to "super")
    #custom code
  end
end

 "original" would behave similar to "super"

The term "original" can be replaced by any term which describes this concept better.






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