From: Regis d'Aubarede <regis.aubarede@...>
Date: 2010-06-04T03:28:56+09:00
Subject: Re: dynamicaly define a method which body can contain yield

Here a (partial) solution :

class B
 def p1 ; puts "p1"; end

 def self.add_tag(name,&blk)
   define_method(name) do |*args,&blocs|
      instance_eval { blk.call(*args,&blocs) }
   end
 end

end

b=B.new
b.instance_eval {
 B.add_tag("p5") { |*a,&bb|    p1 ; bb.call(*a) ; p1 }
}

b.p5(1,2,3) {|*a| puts "in bloc p5 : #{a.inspect}" }
> p1
> in bloc p5 : [1, 2, 3]
> p1

'b.instance_eval'  seem necessary for that p1() call in add_tag() bloc 
bind
to 'b' instance

Thank you ,
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