Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:20807
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Content-class: urn:content-classes:message
MIME-Version: 1.0
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable
Date: Tue, 29 Nov 2005 09:39:01 -0000
Message-ID: <CDA511FF6152D14E922434CE338CE8BB275842@leedsmet-exch1.leedsmet.ac.uk>
Thread-Topic: [PHP-DEV] Re: Labeled Breaks (not the G-word)
Thread-Index: AcX0xkXabEf2jzW5TRiQths85WRbTwAAKIFQ
To: <internals@lists.php.net>
Subject: RE: [PHP-DEV] Re: Labeled Breaks (not the G-word)
From: M.Ford@leedsmet.ac.uk ("Ford, Mike")

On 29 November 2005 09:18, Bart de Boer wrote:

> I feel we're comparing apples with oranges here.
>=20
> Break; is for breaking out of loops. It shouldn't have anything to do
> with jumping to somewhere else. Let's say *if* PHP supported jumping
> through the code. The following should then be two different things:
>=20
> while (loop) {
>     goto LABEL;
> }
> > LABEL
>=20
> while (loop) {
>     break;
> }
>=20
> I think the question here is if we want to implement jumping
> through the
> code or not. If we do jumping in the code, this should be a
> full-fledged feature. If not, there should be no jumping. And it
> should, in my opinion, certainly not change the way break; works.

I'm completely indifferent about goto (in any form), but *PLEASE* can we ha=
ve labelled break/continue -- something like:

  LABEL: while (cond):
    ...
    break LABEL;
    ...
  endwhile;

or

  while LABEL (cond):
    ...
    break LABEL;
    ...
  endwhile;

or

  while (cond) LABEL:
    ...
    break LABEL;
    ...
  endwhile;

I can't tell you the number of times I've broken my own code by adding or r=
emoving an inner loop and failing to notice that a break/continue count nee=
ds incrementing/decrementing.  Labelled breaks are a relatively simple addi=
tion to the syntax that would improve the programming experience out of all=
 proportion.  Yes it's complete syntactic sugar -- it doesn't do anything y=
ou can't currently do, just does it in a much more friendly way -- but incr=
edibly helpful sugar ;)

Cheers!

Mike

---------------------------------------------------------------------
Mike Ford,  Electronic Information Services Adviser,
Learning Support Services, Learning & Information Services,
JG125, James Graham Building, Leeds Metropolitan University,
Headingley Campus, LEEDS,  LS6 3QS,  United Kingdom
Email: m.ford@leedsmet.ac.uk
Tel: +44 113 283 2600 extn 4730      Fax:  +44 113 283 3211=20


To view the terms under which this email is distributed, please go to http:=
//disclaimer.leedsmet.ac.uk/email.htm