From: Nobuyoshi Nakada <nobu@...>
Date: 2006-09-21T12:39:33+09:00
Subject: Re: const_defined? not quite in sync with const_get ??

Date: Thu, 21 Sep 2006 02:06:56 +0900
Posted: Wed, 20 Sep 2006 18:06:54 +0100
From: "Chris Roos" <chrisjroos@gmail.com>
Reply-To: ruby-talk@ruby-lang.org
Subject: const_defined? not quite in sync with const_get ??
To: ruby-talk@ruby-lang.org (ruby-talk ML)
Message-Id: <3a5e51050609201006j5dc6449cyae74e71099fb3f52@mail.gmail.com>
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2006/9/21, Chris Roos <chrisjroos@gmail.com>:
> Assuming the following snippet, I'd expect Foo::const_defined?(:Bar)
> to be routed via Foo::const_missing.  Instead it resolves to top-level
> Bar.  Can someone explain why please?
>
> --code--
>
> class Bar
> end
>
> module Foo
>   def self.const_missing(konst)
>     puts "missing konst #{konst}"
>   end
> end
>
> Foo::Bar
> #=> missing konst Bar # Unsurprising behaviour
>
> p Foo::const_defined?(:Bar)
> false # Unsurprising behaviour
>
> p Foo::const_get(:Bar)
> #=> Bar # Surprising behaviour
>
> --/code--
>
> Cheers,
>
> Chris
>
>


-- 
なかだです。

-- 
--- 僕の前にBugはない。
--- 僕の後ろにBugはできる。
    中田 伸悦