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Date: Wed, 14 Sep 2011 18:21:48 +0100
From: Stephane Chazelas <stephane_chazelas@yahoo.fr>
To: zsh-users@zsh.org
Subject: {fd}< and compound commands
Message-ID: <20110914172148.GA7325@yahoo.fr>
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User-Agent: Mutt/1.5.21 (2010-09-15)

Hiya,

$ echo $ZSH_VERSION
4.3.12
$ zsh -c '{echo foo >&$fd;}  {fd}> a'
zsh:1: parse error near `{'
(same for while/do/done constructs at least)

Is that the expected behavior? I can't see it being documented.

That would be useful in

while read <&$fd var; do
  ...
done {fd}< file

to avoid having to worry about overriding fds 3-9.

-- 
Stephane