From: Harry Ohlsen <harryo@...>
Date: 2004-04-30T14:14:32+09:00
Subject: Re: coerce(), what protocol to implement it

> Is there something like
>   Class.implementers( meth)
> that would return a list of all known classes that implement
> some method ? It could not returned the classes that where
> never required but it may help understand the protocols for
> common methods that where designed to be redefined

If you have ri installed (and if you don't, I'd definitely recommend doing so), try something like

  ri <method>

For example, "ri open" gives me

  The method named `open' is not unique among Ruby's classes and modules:
       Dir::open, File::open, Kernel::open

Cheers,

Harry O.