From: Jilles Tjoelker <jilles@stack.nl>
To: zsh-workers@zsh.org
Subject: Re: syntax error with anonymous functions when an argument begins with (
Date: Sun, 31 Jul 2011 16:17:15 +0200 [thread overview]
Message-ID: <20110731141715.GA66652@stack.nl> (raw)
> [people want stuff like () { echo yay } (a|b)]
In fact, the closing brace may validly be followed by certain keywords
in older zsh, for example
if :; then () { echo hi; } else () { echo bye; } fi
prints "hi" in zsh 4.3.12 from FreeBSD ports.
If a regular function definition is used, like
if :; then f() { echo hi; } else f() { echo bye; } fi; f
then the construct is POSIX compliant and works in all shells I tried
(not including patched versions of zsh).
The same applies if the function definition contains a different kind of
compound command such as if, which is unusual but POSIX compliant and
portable. For example, between two "fi" keywords a space suffices.
(On the other hand, if another command follows, such as ... fi; if ...,
a separator is required.)
So I think that unfortunately passing arguments to anonymous functions
requires an uglier syntax to avoid breaking compatibility. In any case,
placing a keyword after a closing brace that is not an anonymous
function's main command is valid and should be recognized as such.
--
Jilles Tjoelker
next reply other threads:[~2011-07-31 14:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-31 14:17 Jilles Tjoelker [this message]
2011-07-31 18:39 ` Peter Stephenson
2011-08-08 4:29 ` Mikael Magnusson
2011-08-08 8:34 ` Peter Stephenson
2011-08-08 8:40 ` Mikael Magnusson
-- strict thread matches above, loose matches on Subject: below --
2011-07-27 16:48 Mikael Magnusson
2011-07-27 19:22 ` Peter Stephenson
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