Req #49957 [Com]: Need magic method for every data type
Edit report at http://bugs.php.net/bug.php?id=49957&edit=1
ID: 49957
Comment by: bob_the_builder at gmail dot com
Reported by: greg at imagiclab dot com
Summary: Need magic method for every data type
Status: Bogus
Type: Feature/Change Request
Package: Feature/Change Request
Operating System: unix
PHP Version: 5.3.0
Block user comment: N
New Comment:
@johannes
the problems you are mentioning are not new to OO languages. The same
problem might arise in C++ for example when 2 valid implicit cast exist.
This would simply raise an error. The programmer has to ability to
specify casts as explicit, so they will be invoked only if it is
explicity requested. Therefore he can only provide a single impicit cast
to prevent such an error. The same scheme could be applied in php. If
more than one implicit cast is found an E_USER error could be raised.
Previous Comments:
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[2009-10-23 15:39:34] greg at imagiclab dot com
Ok i see you point but other are not as complex like
__toResource would be create for connect on demand db classes
you can also only have the magic methods for float and int called if you
are specifically cast like (int)$Object
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[2009-10-23 10:24:21] johannes@php.net
This was discussed and leads to too many unclear situations. Like should
$a + $b call toFloat or toInt or what? What about $a < $b? Maybe a
string comparison.
In the end implementing this gives more trouble than where it helps.
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[2009-10-22 15:23:46] greg at imagiclab dot com
Description:
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Need magic method for every data type.
Why have a incomplete magic method list. Why not a __toInt and
__toResource.
We are trying to change a legacy system to connect to mysql on demand
and would love a __toResource magic method.
Also anyone who uses class based enums would like a __toInt to convert
the enum to is int valyue and to use __toSting to convert the enum to
its label.
Reproduce code:
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From manual page: language.oop5.magic
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Edit this bug report at http://bugs.php.net/bug.php?id=49957&edit=1
Thread (4 messages)