From: Josh Cheek <josh.cheek@...>
Date: 2010-11-26T02:54:02+09:00
Subject: Re: VERSION constant issue

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On Thu, Nov 25, 2010 at 7:54 AM, Intransition <transfire@gmail.com> wrote:

> Ruby's VERSION constant is getting in the way of using #const_missing
> in my module. Here's some example code:
>
>  module Foo
>    def self.const_data
>      @const_data ||= { 'version' => '1.0.0' }
>    end
>
>    def self.const_missing(name)
>      key = name.to_s.downcase
>      const_data[key] || super(name)
>    end
>  end
>
>  Foo::VERSION  #=> '1.8.7'
>
> How can I fix this?
>
> I tried `remove_const(:VERSION)` at the toplevel but discovered that
> some Ruby library don't like that (sorry, can't recall which it was
> off hand).
>
>
Here are my results.

module Foo
  def self.const_data
    @const_data ||= { 'version' => '1.0.0' }
  end

  def self.const_missing(name)
    key = name.to_s.downcase
    const_data[key] || super(name)
  end

  VERSION       # => "1.8.7"
  self::VERSION # => "1.0.0"

  def self.method
    VERSION     # => "1.8.7"
  end
  method
end

# going back through ruby versions
# I wasn't able to get these to print
# the ruby version until 1.7.1
# thanks, ruby-versions.net :)
Foo::VERSION # => "1.0.0"
Foo::VERSION # => "1.0.0"

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