From: nobuyoshi nakada <nobuyoshi.nakada@...>
Date: 2006-01-16T17:45:41+09:00
Subject: Re: const_defined? behavior

Hi

At Mon, 16 Jan 2006 17:05:29 +0900,
Daniel Amelang wrote in [ruby-talk:175899]:
> Is this the intended behavior of const_defined?
> 
> >> IO::SYNC
> => 4096
> >> IO.const_defined? :SYNC
> => false
> 
> It appears that const_defined? only returns true if the class is the
> originator of the constant. If the constant was borrowed from
> somewhere else (in this case, File::Constants), it returns false.

Yes.

> That's on purpose, right? If that's the case, I must resort to
> IO.constants.member?('SYNC') for my intended behavior, I suppose.
> Seems a little strange.

defined?(IO::SYNC)

-- 
Nobu Nakada