From: Daniel Schierbeck <daniel.schierbeck@...>
Date: 2006-05-28T18:04:22+09:00
Subject: Re: Crazy thought -- Rubyish type conversion?

I even got an implementation, although it obviously differs a lot from 
the proposed syntax.

   class Module
     alias_method :__define_method__, :define_method
     def define_method(name, *types, &block)
       if types.length > 0
         __define_method__(name) do |*args|
           args.each_index do |i|
             unless types[i].nil?
               args[i] = args[i].send("to_#{types[i]}")
             end
           end
           block.call(*args)
         end
       else
         __define_method__(name, &block)
       end
     end
   end

   class Test
     define_method(:foo, :sym, nil, :s) do |a, b, c|
       p a, b, c
     end
   end

   Test.new.foo("bar", 5, 6)   #=> :bar, 5, "6"


Cheers,
Daniel