From: ts <decoux@...>
Date: 2004-01-30T20:05:03+09:00
Subject: Re: Bignums and return

>>>>> "A" == Andre Nathan <andre@digirati.com.br> writes:

A> That gives me the same results the explicit return version gave me.

 Well, here the explanation

svg% ruby -rii -e 'dump; def a() return a; end; def b() b; end'
eval_tree
BLOCK
  NEWLINE <-e:1>
  VCALL dump 
  NEWLINE <-e:1>

  DEFN a 
    SCOPE
      BLOCK
        ARGS
        NEWLINE <-e:1>
        RETURN
          VCALL a 

  NEWLINE <-e:1>

  DEFN b 
    SCOPE
      BLOCK
        ARGS
        NEWLINE <-e:1>
        VCALL b 


svg% 


 because there is an explicit return, ruby has added a NODE RETURN (which
 call rb_eval()).

 When ruby call the method #a it will use more stack (there is one more
 call) than when it call the method #b


Guy Decoux