ruby-dev

まつもと ゆきひろです

In message "[ruby-dev:12069] Re: break from proc-closure (Re: [ruby-list:27277])"
    on 01/01/23, m_seki@mva.biglobe.ne.jp <m_seki@mva.biglobe.ne.jp> writes:

|>   [args].each(&proc)
|> 
|> がbreakでLocalJumpErrorを返せば妥協できますか？
|
|おおcool。break, retryでLocalJumpErrorですね。
|できると思います。うれしぃ。

それは良かった。今日か明日には1.7系でコミットできると思いま
す。で、確認できれば1.6系にバックポートと。

|それはそれとして、
|   ary.each { なんとか; break if かんとか }
|と 
|   proc = Proc.new { なんとか; break if かんとか }
|   ary.each(&proc)
|は同じ振る舞いにしなくても良いですか?

私も考えたんですが、上でのbreakは明らかにeachを中断するため
のbreakですが、下でのbreakはprocを中断するだけなのか曖昧なの
で、切り捨ててもかまわないだろうと考えました。ただし、これは
procがorphan、つまりコンテキストから切り離されたときだけのこ
とです。
                                まつもと ゆきひろ /:|)

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