From: ts <decoux@...>
Date: 2002-09-29T17:45:29+09:00
Subject: Re: thoughts on typelessness

>>>>> "d" == dblack  <dblack@candle.superlink.net> writes:

d> I don't have any conclusive, ummm, conclusions to draw.  Just
d> wondering what people think of all of this.  There was talk briefly of
d> the idea of multi-dispatch and method signatures on respond_to?
d> criteria, rather than type.  Maybe that's a way to bring that more
d> accessibly and concisely into the syntax.  (Though I'm not sure
d> exactly what that way would consist of, syntactially.)

 Why do you think that I've added module in the signature (see
 (ruby-talk:50139)) ? 

 an enumerable is just an object which respond to #each

pigeon% cat b.rb
#!./ruby
class A
   def tt(Enumerable a)
      p "I respond to #each : #{a.inspect}"
   end

   def tt(Kernel a)
      p "I don't know #each : #{a.inspect}"
   end
end

a = A.new
a.tt([1, 2])
a.tt("string")
a.tt(A.new)

pigeon% 

pigeon% b.rb
"I respond to #each : [1, 2]"
"I respond to #each : \"string\""
"I don't know #each : #<A:0x401ad360>"
pigeon%


Guy Decoux