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Date: Thu, 19 Feb 2015 15:31:30 +0000
Message-ID: <CA+kxMuSbX_gZKmLE_+hKkhbS_ag8k+HYKpa9=_fVuj4xrjhhuA@mail.gmail.com>
To: Dmitry Stogov <dmitry@zend.com>
Cc: Nikita Popov <nikita.ppv@gmail.com>, PHP internals <internals@lists.php.net>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [PHP-DEV] Re: [RFC] Exceptions in the engine
From: danack@basereality.com (Dan Ackroyd)

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