From: Navindra Umanee <navindra@...>
Date: 2005-03-14T04:18:39+09:00
Subject: Re: how do you duck-type something to String, so String believes you?

> What you can do is override String.== to take this into consideration.
> 
> class String
>         alias :_equals :==
>         def ==(o)
>                 _equals(o.to_s)
>         end
> end

ES is right, you don't need to redefine == in String if you do it in
Str.  I didn't notice that str1 and str2 were swapped around in the
call to rb_equal.

    if (TYPE(str2) != T_STRING) {
        if (!rb_respond_to(str2, rb_intern("to_str"))) {
            return Qfalse;
        }
        return rb_equal(str2, str1);               
    }

Clever.  :-)

Cheers,
Navin.