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Date: Thu, 19 Feb 2015 19:46:47 +0400
Message-ID: <CA+9eiLua0ckNF4o0-n2Z6QJ70g2Vgi1B1X6OpHbNN-gL67d_QA@mail.gmail.com>
To: Dan Ackroyd <danack@basereality.com>
Cc: Nikita Popov <nikita.ppv@gmail.com>, PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=089e0115f048fae1f9050f72d71b
Subject: Re: [PHP-DEV] Re: [RFC] Exceptions in the engine
From: dmitry@zend.com (Dmitry Stogov)

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Exception declares protected properties that may be used in child classes
directly.
This is not possible with interface.

Thanks. Dmitry.

On Thu, Feb 19, 2015 at 6:31 PM, Dan Ackroyd <danack@basereality.com> wrote:

> On 19 February 2015 at 09:54, Dmitry Stogov <dmitry@zend.com> wrote:
>
> > I think we may introduce the following hierarchy
> > the existing code that caught Exception is going to be unaffected.
>
> We could do that. But it's not obviously correct, and ought to be
> justified as to why it would be the correct thing to do.
>
> The problem of people needing to catch every type of exception could
> also be solved by using a common interface.
>
> class EngineException implements ExceptionInterface {}
> class Exception implements ExceptionInterface {}
>
> try {
>     foo();
> }
> catch(ExceptionInterface $exception) {
>     //catches everything.
> }
>
> This avoids a requirement for all exceptions to extend from a common
> base class. The interface for exceptions would be the current
> Exception classes methods, excluding the constructor.
>
> > We thought about "Throwable" or "Catchable" interface, but this change
> > would require more changes and will make more BC breaks.
>
> Please can you explain what those problems are?
>
>
> cheers
> Dan
>

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