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From: Bart Schaefer <schaefer@brasslantern.com>
Message-id: <120220105301.ZM436@torch.brasslantern.com>
Date: Mon, 20 Feb 2012 10:53:01 -0800
In-reply-to: <20120220183335.GE7797@xvii.vinc17.org>
Comments: In reply to Vincent Lefevre <vincent@vinc17.net>
 "Re: suspend (^Z) behavior while a function is running is unclear" (Feb 20,
 7:33pm)
References: <20120220130259.GB7797@xvii.vinc17.org>
	<20120220151309.4cc1a83d@pwslap01u.europe.root.pri>
	<20120220160944.GC7797@xvii.vinc17.org>
	<20120220163557.672588e2@pwslap01u.europe.root.pri>
	<120220094100.ZM359@torch.brasslantern.com>
	<20120220183335.GE7797@xvii.vinc17.org>
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Subject: Re: suspend (^Z) behavior while a function is running is unclear
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On Feb 20,  7:33pm, Vincent Lefevre wrote:
} Subject: Re: suspend (^Z) behavior while a function is running is unclear
}
} > torch% foreach foo (a b c) { sleep 5 } | :  
} > zsh: job can't be suspended
} 
} However if the command outputs something, one loses the output.

I didn't really mean to imply that you should use this, just that some
of the plumbing is in place if we wanted to provide direct control.

On the other hand:

foreach foo (a b c) { print $foo; sleep 5 } | while { read -rE } { : }

(Using shortloops syntax to emphasize zsh-ness of this trick.)
 
} But with the encapsulation (to save typing), this is very limited.

As a hack, one could do:

    alias -g NOSUSP='|while { read -rE } { : }'

    foreach foo (a b c) { print $foo; sleep 5 } NOSUSP

This is similar to the "alias -g M='|more'" trick that I know a number
of people have used at one time or another.