From: Mike Austin <noone@...>
Date: 2006-03-21T15:48:50+09:00
Subject: Re: Method overload, care to improve?

Here's a working prototype:

class Test
   #generic :foo (would generate the code below)
   @@foo = Object.new
   define_method :foo do |*args|
     method = args.map { |a| a.class }.join( "_" )
     @@foo.send( method, *args )
   end
end

class Test
   def @@foo.Fixnum_Fixnum( x, y )
     return x * y
   end

   def @@foo.Fixnum_Float( x, y )
     return x / y
   end
end

t = Test.new
t.foo( 10, 20 )
t.foo( 10, 2.0 )

It's inefficient and all that, but I think it looks pretty nice :)
Mike

Trans wrote:
> Thanks Andrew.
> 
> I'm afraid I don't care for how the strongtyping lib handles
> overloading with the #overload call internal to the method. It
> undermines dynamic capabilities. Eg.
> 
>      def bar(*args)
>          overload(args, String, String) {
>             | s1, s2 |
>             ...
>             return
>          }
> 
>          overload(args, String, Integer) {
>             | s, i |
>             ...
>             return
>          }
> 
>          overload_error args
>       end
> 
> It would be tricky to add another overload post defnition of the
> original.