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Date: Thu, 13 Nov 2008 14:25:06 +0000
From: Stephane Chazelas <Stephane_Chazelas@yahoo.fr>
To: Zsh hackers list <zsh-workers@sunsite.dk>
Subject: Re: f() { ...; } > file
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On Wed, Nov 05, 2008 at 09:20:36PM +0000, Stephane Chazelas wrote:
[...]
> $ bash -c 'foo() { echo a >&3; } 3>&1; foo'
> a
> $ ksh -c 'foo() { echo a >&3; } 3>&1; foo'
> a
> $ zsh -c 'foo() { echo a >&3; } 3>&1; foo'
> foo: 3: bad file descriptor
> $ ARGV0=sh zsh -c 'foo() { command echo a >&3; } 3>&1; foo'
> foo: 3: bad file descriptor
> 
> It looks like zsh evaluates the redirection at the time the
> function is defined rather than when it is called.
> 
> It's OK when declaring the function as
> 
> foo() echo a > file
> or
> foo() (echo a) > file
> 
> instead of
> 
> foo() { echo a; } > file
[...]

Interestingly, foo() > file { echo a; } works:

~$ bash -c 'f() { echo a; } > /dev/null; declare -f'
f ()
{
    echo a
} > /dev/null
~$ ksh -c 'f() { echo a; } > /dev/null; typeset -f'
f() { echo a; } > /dev/null;%                                                                                                                                                        ~$ zsh -c 'f() { echo a; } > /dev/null; typeset -f'
f () {
        echo a
}
~$ zsh -c 'f() > /dev/null { echo a; }; typeset -f'
f () {
        {
                echo a
        } > /dev/null
}


-- 
Stéphane