From: "David A. Black" <dblack@...>
Date: 2008-10-18T04:45:18+09:00
Subject: [ruby-core:19369] Re: Yet another block semantic/syntax question

Hi --

On Fri, 17 Oct 2008, Yukihiro Matsumoto wrote:

> Hi,
>
> In message "Re: [ruby-core:19343] Yet another block semantic/syntax question"
>    on Wed, 15 Oct 2008 23:03:20 +0900, "David A. Black" <dblack@rubypal.com> writes:
>
> |I just want to make sure I'm right that this is what happens, and that
> |it's supposed to happen:
> |
> |>>  pr = Proc.new {|a,b=1| p a, b }
> |=> #<Proc:0x1ee114@(irb):10>
> |>>   pr.call(10,20)
> |10
> |1
> |=> [10, 1]
>
> |In other words, Proc.new accepts the method-argument syntax, but does
> |not use method-argument semantics (it sets b unconditionally to 1).
> |(lambda uses method-arg semantics all the way in similar cases.)
>
> It's a bug.  ;-<

What is it supposed to do? Meaning: should Proc.new {|a,b=1| } behave
like lambda, or should it be a syntax error (because it's using "yield
semantics")?


David

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