From: dagbrown@... (Dave Brown)
Date: 2004-04-19T04:14:10+09:00
Subject: Re: New Local Variable Scope rule

In article <4082CA8A.7010605@weirichhouse.org>,
Jim Weirich  <jim@weirichhouse.org> wrote:
: David Alan Black wrote:
: > Is a 'local' keyword being introduced in 2.0?  I can't find mention of
: > it.
: 
: All local would be is ...
: 
:    def local
:      yield
:    end

Hrmm.  Not QUITE.  It complained at me when I tried that.

    irb(main):001:0> def local;yield;end
    => nil
    irb(main):002:0> local do |x| x=32;p x;end
    (irb):2: warning: multiple values for a block parameter (0 for 1)
            from (irb):1
    32
    => nil

A slight variation on that though...

    irb(main):007:0> def local(&block);yield block;end
    => nil
    irb(main):008:0> local do |x| x=32; p x; end
    32
    => nil
    irb(main):009:0> x
    NameError: undefined local variable or method `x' for main:Object

That works nicely.

--Dave