From: Mathieu Bouchard <matju@...>
Date: 2005-04-02T19:26:05+09:00
Subject: Re: Hash::MixIn and Python style Object#dict


On Sat, 2 Apr 2005, Mathieu Bouchard wrote:
> class MyHash; include HollowHash # (3)
>   def each_key(&b)
>     # blah blah blah
>   end
>   # further blah
> end
> class MyVerifiedHash < MyHash; include SimpleHashP; end

woops, make that:


class MyHash; include HollowHash; include SimpleStringP # (3)
  def each_key(&b)
    # blah blah blah
  end
  # further blah
end
class MyVerifiedHash < MyHash; include SimpleHashP::Contract; end


SimpleHashP is the "declarator" module, that asserts that a given module
supports a feature set. SimpleHashP::Contract is a "verifier" module.
However there is currently still no hint that a given module _wants_ an
implementation of a given feature set in the way that HollowHash wants a
SimpleHashP without providing a default implementation of it.

_____________________________________________________________________
Mathieu Bouchard -=- Montr�al QC Canada -=- http://artengine.ca/matju