Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:42063
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain mac.com designates 17.148.16.87 as permitted sender)
MIME-version: 1.0
Content-transfer-encoding: 7BIT
Content-type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Message-ID: <48D535F0-CCAE-4151-AC6B-94A0BBFC59BA@mac.com>
To: internals@lists.php.net
In-reply-to: <492B62A1.2000207@rwth-aachen.de>
Date: Wed, 26 Nov 2008 18:07:44 -0500
References: <002b01c92d67$ae92fdc0$0bb8f940$@de>
 <79.C8.07308.CDE4C194@pb1.pair.com> <49203DF2.1020006@stefan-marr.de>
 <45289205.20081125005213@marcus-boerger.de> <492B62A1.2000207@rwth-aachen.de>
Subject: Re: [PHP-DEV] Grafts, Traits, horizontal reuse
From: apinstein@mac.com (Alan Pinstein)

On Nov 24, 2008, at 9:27 PM, Christopher Vogt wrote:

> Interfaces are helpful in combination with type hinting, but for  
> people who prefer
> duck typing, it is reasonable to not explicitly define them.

It sounds like you are saying that if you prefer duck typing then  
interfaces have no use.

If this is what you mean, I disagree strongly.

Interfaces are primarily to create a set of methods that define an  
interface. Then the compiler can enforce implementation of that  
interface in any class that claims to implement the interface. This is  
the core utility of interfaces.

Alan