From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?iso-8859-1?Q?Bj=F6rn?= Steinbrink <B.Steinbrink@gmx.de>
Subject: Re: [PATCH] git-svn: handle leading/trailing whitespace from
	svnsync revprops
Date: Sat, 12 Jan 2008 10:55:05 +0100
Message-ID: <20080112095505.GA5681@atjola.homenet>
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Cc: Junio C Hamano <gitster@pobox.com>,
	Dennis Schridde <devurandom@gmx.net>, git@vger.kernel.org
To: Eric Wong <normalperson@yhbt.net>
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On 2008.01.12 01:12:42 -0800, Eric Wong wrote:
> Junio C Hamano <gitster@pobox.com> wrote:
> > Is it only me who finds that
> >=20
> > 	($var) =3D ($var =3D~ m{^(any regexp)$}) or die "message"
> >=20
> > is extremely a roundabout and hard-to-read way to say:
> >=20
> > 	if ($var !~ m{^(the same regexp)$} {
> >         	die "message";
> > 	}
> >=20
> > which is much easier to read?
>=20
> The statements are not equivalent, however.  I'd have to add
>=20
> 	$var =3D $1;
>=20
> too, because I needed to extract what was inside the ( ) since the '$=
'
> doesn't catch the trailing newline, either.  I also couldn't find any=
 of
> the /sm, /m, /s switches useful for making '$' not accept the trailin=
g
> newline, either.

The \z assertion will do, eg m/^foo\z/ will only match exactly "foo",
not "foo\n". As it is a zero-width assertion, you can also write
m/^foo\z$/ if you prefer that.

Bj=F6rn