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From: Peter Stephenson <p.w.stephenson@ntlworld.com>
To: zsh-users@zsh.org
Subject: Re: {fd}< and compound commands
In-Reply-To: Message from Stephane Chazelas <stephane_chazelas@yahoo.fr>
   of "Wed, 14 Sep 2011 20:31:41 BST." <20110914193141.GB7325@yahoo.fr>
Date: Wed, 14 Sep 2011 22:05:35 +0100

Stephane Chazelas wrote:
> 2011-09-14 20:06:01 +0100, Peter Stephenson:
> [...]
> > {
> >   exec {fd}<file
> > 
> >   while read; do
> >     ...
> >   done <&$fd
> > } always {
> >   exec {fd}<&-
> > }
> 
> Thanks Peter,
> 
> Why the "always" here?

That's extended { ... } syntax to ensure the clean-up gets executed even
if there's an error in the main block.  In fact, if I'd known Ruby when
I wrote it, I'd probably have called it "ensure" instead.

-- 
Peter Stephenson <p.w.stephenson@ntlworld.com>
Web page now at http://homepage.ntlworld.com/p.w.stephenson/