Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:52057 Return-Path: Mailing-List: contact internals-help@lists.php.net; run by ezmlm Delivered-To: mailing list internals@lists.php.net Received: (qmail 90143 invoked from network); 28 Apr 2011 13:39:22 -0000 Received: from unknown (HELO lists.php.net) (127.0.0.1) by localhost with SMTP; 28 Apr 2011 13:39:22 -0000 Authentication-Results: pb1.pair.com header.from=addw@phcomp.co.uk; sender-id=permerror Authentication-Results: pb1.pair.com smtp.mail=addw@phcomp.co.uk; spf=pass; sender-id=pass Received-SPF: pass (pb1.pair.com: domain phcomp.co.uk designates 80.68.91.63 as permitted sender) X-PHP-List-Original-Sender: addw@phcomp.co.uk X-Host-Fingerprint: 80.68.91.63 bytemark.phcomp.co.uk Received: from [80.68.91.63] ([80.68.91.63:57421] helo=bytemark.phcomp.co.uk) by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP id AE/CA-28716-90E69BD4 for ; Thu, 28 Apr 2011 09:39:22 -0400 Received: from freshmint.phcomp.co.uk ([78.32.209.33] helo=mint.phcomp.co.uk) by bytemark.phcomp.co.uk with esmtps (TLSv1:AES256-SHA:256) (Exim 4.71) (envelope-from ) id 1QFRR6-0001K5-6p for internals@lists.php.net; Thu, 28 Apr 2011 14:39:16 +0100 Received: from addw by mint.phcomp.co.uk with local (Exim 4.63) (envelope-from ) id 1QFRR5-0006MV-MS for internals@lists.php.net; Thu, 28 Apr 2011 14:39:15 +0100 Date: Thu, 28 Apr 2011 14:39:15 +0100 To: "internals@lists.php.net" Message-ID: <20110428133915.GR8496@phcomp.co.uk> Mail-Followup-To: "internals@lists.php.net" References: <4DB923E6.3020307@sugarcrm.com> <4DB925D4.5090107@thelounge.net> <4DB926B4.5000307@sugarcrm.com> <20110428085859.GJ8496@phcomp.co.uk> <4DB936C8.2080801@lerdorf.com> <20110428095958.GM8496@phcomp.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.2i Organization: Parliament Hill Computers Ltd Subject: Re: [PHP-DEV] [RFC] Return type-hint From: addw@phcomp.co.uk (Alain Williams) On Thu, Apr 28, 2011 at 10:30:43AM -0300, Martin Scotta wrote: > Hey All, > I'm really interested on this topic. > > What would be the result of this? > > function Foo foo($something) { > if ( $something ) { > return new Foo; > } > // no return implies return null > } > > How do you force to return a Type with null allowed? That is why I suggested, in addition to the above, a syntax like: function (Foo | NULL) foo($something) { to be able to specify where a function can return more than one type. The 'extra' types/values are nearly always either NULL or FALSE. Regards -- Alain Williams Linux/GNU Consultant - Mail systems, Web sites, Networking, Programmer, IT Lecturer. +44 (0) 787 668 0256 http://www.phcomp.co.uk/ Parliament Hill Computers Ltd. Registration Information: http://www.phcomp.co.uk/contact.php #include