From: matz@... (Yukihiro Matsumoto)
Date: 2003-02-05T04:42:55+09:00
Subject: Re: Local variables & blocks

Hi,

In message "Re: Local variables & blocks"
    on 03/02/05, Brian Candler <B.Candler@pobox.com> writes:

|(1) Matz wants a compulsory warning here:
|
|  foo = 0
|  [1,2,3].each { |foo|         # << HERE
|    ..
|  }
|
|Myself, and several others on this list, feel that this warning should be
|optional. It's not really necessary at all, unless you're concerned about
|making your scripts run on earlier versions of Ruby.

But I still hate shadowing, strong enough to raise warning.

|(2) I asked for a warning (optional, with -w) if a local variable is
|assigned but not used. Examples would be:

Nobu once made a patch for this.  I didn't merge it because it's
little bit ugly in the current implementation.  But I like the idea.
I will definitely add this check in the future release.

							matz.