From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from lists.gentoo.org ([140.105.134.102] helo=robin.gentoo.org)
	by finch.gentoo.org with esmtp (Exim 4.60)
	(envelope-from <gentoo-dev+bounces-27469-garchives=archives.gentoo.org@gentoo.org>)
	id 1IonTg-0005AN-0e
	for garchives@archives.gentoo.org; Sun, 04 Nov 2007 21:57:56 +0000
Received: from robin.gentoo.org (localhost [127.0.0.1])
	by robin.gentoo.org (8.14.1/8.14.0) with SMTP id lA4Lv5YO010423;
	Sun, 4 Nov 2007 21:57:05 GMT
Received: from nf-out-0910.google.com (nf-out-0910.google.com [64.233.182.191])
	by robin.gentoo.org (8.14.1/8.14.0) with ESMTP id lA4LsXx8007014
	for <gentoo-dev@lists.gentoo.org>; Sun, 4 Nov 2007 21:54:33 GMT
Received: by nf-out-0910.google.com with SMTP id f5so1361735nfh
        for <gentoo-dev@lists.gentoo.org>; Sun, 04 Nov 2007 13:54:32 -0800 (PST)
Received: by 10.78.137.7 with SMTP id k7mr3271879hud.1194213272164;
        Sun, 04 Nov 2007 13:54:32 -0800 (PST)
Received: by 10.78.21.9 with HTTP; Sun, 4 Nov 2007 13:54:32 -0800 (PST)
Message-ID: <b41005390711041354k451e6ce6pcdd0b52e1855ec6e@mail.gmail.com>
Date: Sun, 4 Nov 2007 14:54:32 -0700
From: "Alec Warner" <antarus@gentoo.org>
Sender: antarus@scriptkitty.com
To: gentoo-dev@lists.gentoo.org
Subject: Re: [gentoo-dev] Re: More general interface to use flags
Cc: gentoo-portage-dev@lists.gentoo.org
In-Reply-To: <fgk860$gv$1@ger.gmane.org>
Precedence: bulk
List-Post: <mailto:gentoo-dev@lists.gentoo.org>
List-Help: <mailto:gentoo-dev+help@gentoo.org>
List-Unsubscribe: <mailto:gentoo-dev+unsubscribe@gentoo.org>
List-Subscribe: <mailto:gentoo-dev+subscribe@gentoo.org>
List-Id: Gentoo Linux mail <gentoo-dev.gentoo.org>
X-BeenThere: gentoo-dev@gentoo.org
Reply-to: gentoo-dev@lists.gentoo.org
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
References: <472B29B9.50002@gentoo.org> <fgk860$gv$1@ger.gmane.org>
X-Google-Sender-Auth: 9d21e30f65a312b1
X-Archives-Salt: 2d943b27-7a2c-402e-a465-925bf5d0a880
X-Archives-Hash: 31b10da2393e00e5bed8a00e5c2342db

On 11/4/07, Steve Long <slong@rathaus.eclipse.co.uk> wrote:
> Marijn Schouten (hkBst) wrote:
> > the current interface to use flags, useq, usev, use_with, use_enable, as
> > defined in /usr/lib/portage/bin/ebuild.sh lacks generality. The common
> > thing is testing a use flag and possibly echoing a string, but there is no
> > function that implements this common behaviour.
> >
> > I propose that we add such a function. Proposed name for the function is
> > "ifuse".
> >
> I like the overall API that is enabled (and that it doesn't break anything.)
>
> > I also propose to add the utility function "ifv" which is useful for
> > writing concise and clean code.
> >
> This one seems a bit light-weight to me, but if it makes your life easier,
> why not?
>
> One minor thing; -n is the default test, so:
> [[ $1 ]] is the same as [[ -n $1 ]]
> and:
> [[ ! $1 ]] is the same as [[ -z $1 ]]
> ''help test'' is very revealing, for those who haven't read it. ;-)

Code Clarity over shortcuts.  Use the explicit version.
-- 
gentoo-dev@gentoo.org mailing list