[ruby-core:45322] [ruby-trunk - Feature #6513] Make method_missing to lookup in constants too

Issue #6513 has been updated by egor.homakov (egor homakov).


@sorah it's probably the best possible example - I met it a while ago in nokogiri and was confused to see "def XML". dirty.Nokogiri.XML.new("<foo />").class - neat

@matz every "new" thing confuses until user learns how it works now. I've been using dot syntax for a while and now :: looks very verbose to me. I aliased method_missing with const_get and happy with that but ... it's slower.

ok let's close it :'(
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Feature #6513: Make method_missing to lookup in constants too
https://bugs.ruby-lang.org/issues/6513#change-26903

Author: egor.homakov (egor homakov)
Status: Feedback
Priority: Normal
Assignee: 
Category: 
Target version: 


=begin
First letter of constant is always a capital letter(in Ruby).
if you define method:

  def Hi
    1
  end

You're not able to use it w/o ():
  Hi
it looks up for constant and raises error. only:
  Hi() or send(:Hi)

None of code style guides teaches to use capital letters in methods' names. It's not convinient and bad practise.
At the same time we use constants(it's modules/classes too) a lot. To access constant we use '(({::}))'

The idea is to change the way how ruby looks up:
(1) if first letter is capital - looking for constant. if not found - moving directly to step 2
(2) looking for local variable and method as we do it now

This change will make syntax much more awesome & sexy:
  ActiveSupport::Autoload -> ActiveSupport.Autoload
  class Request < Rack::Request -> class Request < Rack.Request

Currently I can give you a hence using this monkey patch:
  class Module
    alias method_missing const_get
  end
  module A
    module B
      class C
      end
    end
  end
  #A.B.C instead of A::B::C - awesome?!

For me it is similar to changing hash syntax( => to sym: ''). I know, it is only 1 character less BUT it's 3 visible dots less too :)
Thank you for considering this proposal.
=end



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