Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:67193
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: error (pb1.pair.com: domain ralphschindler.com from 209.85.214.179 cause and error)
Message-ID: <517E953B.9050403@ralphschindler.com>
Date: Mon, 29 Apr 2013 10:43:55 -0500
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.8; rv:17.0) Gecko/20130328 Thunderbird/17.0.5
MIME-Version: 1.0
To: internals@lists.php.net
References: <CAMUwpuTUVhZ23kCz8C0abU9FDzxrAat6y8mbOFKTd8gVifUV1Q@mail.gmail.com>
In-Reply-To: <CAMUwpuTUVhZ23kCz8C0abU9FDzxrAat6y8mbOFKTd8gVifUV1Q@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Re: [PHP-DEV] Continued try blocks
From: ralph@ralphschindler.com (Ralph Schindler)


> So, in this example, if, say, bar() throws a SomeException , the code
> would then resume and execute baz() after the catch block.
>
> Just presenting the idea here, no RFC actually , I'm collecting
> thoughts and notices.

It seems like you want application specific flow control (caller 
specific) when particular exceptions are raised.  This is achievable 
through goto, why not use that?

http://3v4l.org/HsdlD

<?php

class SomeException extends Exception {}

function foo() {
     echo 'attempting 1' . PHP_EOL;
}

function bar($someCondition) {
     echo 'attempting 2 with ' . $someCondition . PHP_EOL;
     if ($someCondition == null) {
         throw new SomeException('Foo foo fooey');
     }
}

function baz() {
     echo 'attempting 3' . PHP_EOL;
     throw new Exception('Boo boo bar');
}

function fixupforbar(&$someCondition) {
     $someCondition = 5;
}



/** main() **/


$someCondition = null;

try {
     foo();
     BAR: bar($someCondition);
     baz();
} catch (SomeException $e) {
     fixupforbar($someCondition);
     goto BAR;
} catch (Exception $e) {
     echo 'Exception caught: ' . $e->getMessage() . PHP_EOL;
} finally {
     echo 'Cleaning up' . PHP_EOL;
}




-ralph