From: justcolin@...
Date: 2015-12-06T03:13:48+00:00
Subject: [ruby-core:71849] [Ruby trunk - Feature #9451] Refinements and	unary & (to_proc)

Issue #9451 has been updated by Colin Fulton.


Is there any update on this feature? In Ruby 2.2.3 I still run into a problem where the unary & can not be used when the method was added with a refinement, such as the following:

`
module Example
  refine String do
    def pugs
      "Pugs!"
    end
  end
end

using Example

puts ('a'..'z').map(&:pugs)
`

I can understand why they currently do not work, but it leads to uglier code.

----------------------------------------
Feature #9451: Refinements and unary & (to_proc)
https://bugs.ruby-lang.org/issues/9451#change-55254

* Author: Jan Lelis
* Status: Assigned
* Priority: Normal
* Assignee: Yukihiro Matsumoto
----------------------------------------
Not sure if this is a bug or feature request:

~~~ruby
require 'minitest/autorun'
require 'set'

module ClassToProc
  refine Class do
    def to_proc
      lambda{ |*args| self.new(*args) }
    end
  end
end

using ClassToProc

describe 'Class#to_proc' do
  it 'works when called directly' do
    Set.to_proc[[1,2]].must_equal Set[1,2]
  end

  it 'fails when called via ampersand' do
    [[1,2]].map(&Set).must_equal [Set[1,2]]
  end
end
~~~

The second example errors with *NoMethodError: super: no superclass method `to_proc' for Set:Class*

Would be great to have it, though.




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