From: nobu.nokada@...
Date: 2004-08-06T12:14:25+09:00
Subject: Re: help from *nix ruby users

Hi,

At Thu, 5 Aug 2004 22:02:48 +0900,
Nicholas Van Weerdenburg wrote in [ruby-talk:108380]:
> How would I normally determine if something is deprecated in ruby? After 
> your email, I tried "ruby -w -e 'p PLATFORM'" but didn't see any 
> warnings of deprecation (if that would be one way to check).

Constants are not accessed with a method, so we don't have a
way to check about it.  Only I think out is a trick using
const_missing.

  class Object
    class << self
      depr = [:VERSION, :PLATFORM, :RELEASE_DATE]
      define_method(:const_missing) do |i|
        if depr.include?(i)
          warn "#{caller(2)[0]}: #{i} is deprecated, use RUBY_#{i}"
          const_get("RUBY_#{i}")
        else
          begin
            super(i)
          rescue NameError
            $@[0,2] = nil
            raise
          end
        end
      end
      depr
    end.each(&method(:remove_const))
  end

-- 
Nobu Nakada