From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <zsh-users-return-2686-mason-zsh=primenet.com.au@sunsite.auc.dk>
Received: (qmail 22714 invoked from network); 15 Oct 1999 09:18:46 -0000
Received: from sunsite.auc.dk (130.225.51.30)
  by ns1.primenet.com.au with SMTP; 15 Oct 1999 09:18:46 -0000
Received: (qmail 26685 invoked by alias); 15 Oct 1999 09:18:10 -0000
Mailing-List: contact zsh-users-help@sunsite.auc.dk; run by ezmlm
Precedence: bulk
X-No-Archive: yes
X-Seq: 2686
Received: (qmail 26676 invoked from network); 15 Oct 1999 09:18:09 -0000
From: "Bart Schaefer" <schaefer@candle.brasslantern.com>
Message-Id: <991015091801.ZM22985@candle.brasslantern.com>
Date: Fri, 15 Oct 1999 09:18:01 +0000
In-Reply-To: <19991014165452.A31729@thelonious.new.ox.ac.uk>
Comments: In reply to Adam Spiers <adam@thelonious.new.ox.ac.uk>
        "autoloading questions" (Oct 14,  4:54pm)
References: <19991014165452.A31729@thelonious.new.ox.ac.uk>
X-Mailer: Z-Mail (5.0.0 30July97)
To: zsh users mailing list <zsh-users@sunsite.auc.dk>
Subject: Re: autoloading questions
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii

On Oct 14,  4:54pm, Adam Spiers wrote:
} Subject: autoloading questions
}
} 1. What's the best way of checking whether an autoload of a function
}    will succeed?  (I mean the actual loading, rather than the
}    invocation of the `autoload' built-in.)

I can't think of anything except

    function testauto {
	emulate -L zsh
	local f
	f=( $^fpath/$1(N) )
	[[ -n $f[1] ]] && $ZSH_NAME -ns < $f[1]
    }

That requires forking an extra shell, though, and it's still nothing
more than a syntax check.

} 2. How can I manually cause an autoloaded function to be loaded
}    without actually running it

Try this:

    function loadauto {
	emulate -L zsh
	local f
	f=( $^fpath/$1(N) )
	eval "function $1 {
	    $(< $f[1])
	}"
    }

(You can replace $(< $f[1]) with $mapfile[$f[1]] if you use that module,
but $(<...) is already a non-forking special-case.)

Actually, I guess calling loadauto would tell you whether the autoload
succeeds, so it sort of answers both questions ....


BTW, this question made me notice that it's not a good idea to do

    autoload fun
    zmodload parameter
    noglob vared functions[fun]

unless you're very careful about whether you press enter.

-- 
Bart Schaefer                                 Brass Lantern Enterprises
http://www.well.com/user/barts              http://www.brasslantern.com