[ruby-talk:10342] Re: OT: Smoking (was Re: ANN: Slide show available)

>>>>> "J" == Joseph McDonald <[e-mail]> writes:

J> Now Guy, what about mmap... I know it's brewing in pigeon lab...
J> raa.puts(decoux.mmap)  :-)

 There is a *BIG* problem actually because I've found something *VERY STUPID*
 to do. This is why I'm not looking at mmap actually.

 First I've written this

pigeon% cat b.rb
#!/usr/bin/ruby -rgeneric
class F
   extend Generic
 
   generic :toto
 
   private
   def toto (a, b)
      [Object, Object]
      puts "[Object, Object]"
   end
 
   public
 
   def toto (a, b)
      [Array, Object]
      yield 12 if block_given?
      puts "[Array, Object]"
      next_method
   end
 
   def toto (a, b)
      [Hash, Object]
      puts "[Hash, Object]"
      next_method
   end
end
 
f = F.new
f.toto([], []) {|a| puts "Hello #{a}" }
f.toto({}, [])
begin
   f.toto(12, [])
rescue
   puts $!
end
 
class F
   def toto(a, b)
      [Object, Array]
   end
end
pigeon% 

pigeon% b.rb
Hello 12
[Array, Object]
[Object, Object]
[Hash, Object]
[Object, Object]
private method `toto' called
./b.rb:39:in `method_added': Possible ambiguous call [Hash, Object] -- [Object, Array] (GenericError)
        from ./b.rb:39
pigeon% 


 But it's stupid because you have something slow (i.e. you replace a method
 call by 3 method call) and you have some other problems.

 This is why the next step was (but I've not yet finished) and it's even
 more stupid :-)

pigeon% cat b.rb
#!./ruby
class B
   class C
   end
end
class A
   def toto(Object a,  B::C b, Array c)
      puts "Object -- B::C -- Array"
   end
   def toto(Object a, Array b, B::C c)
      puts "Object -- Array -- B::C"
   end
   def toto(B::C e, Array a, Array b)
      puts "B::C -- Array -- Array"
   end
end
 
b1 = B::C.new
b2 = B::C.new
a = A.new
 
a.toto([1, 2], b1, [3, 4])
a.toto([1, 2], [3, 4], b2)
a.toto(b1, [1, 2], [3, 4])
a.toto(b1, [1, 2], "2")
pigeon% 

pigeon% b.rb
Object -- B::C -- Array
Object -- Array -- B::C
B::C -- Array -- Array
./b.rb:25: undefined method `toto' for #<A:0x40198cbc> (NameError)
pigeon% 



Guy Decoux