Req #63629 [Com]: New constant __ALIAS__ for trait functions to know how they were called
Edit report at https://bugs.php.net/bug.php?id=63629&edit=1
ID: 63629
Comment by: opitz at pluspol-interactive dot de
Reported by: spamfreedave-zend at yahoo dot com
Summary: New constant __ALIAS__ for trait functions to know
how they were called
Status: No Feedback
Type: Feature/Change Request
Package: *General Issues
Operating System: Mac OSX
PHP Version: 5.4.9
Block user comment: N
Private report: N
New Comment:
Following Scenario:
trait TestTrait
{
protected $var = null;
public function setMethod($value) {
$this->var = $value;
}
public function getMethod() {
return $this->var;
}
}
class TestClass {
use TestTrait {
setMethod as setMethod1;
setMethod as setMethod2;
getMethod as getMethod1;
getMethod as getMethod2;
}
}
$class = new TestClass();
$class->setMethod1('A');
$class->setMethod2('B');
echo $class->getMethod1();
echo $class->getMethod2();
This will output "BB" instead of "AB" With __ALIAS__ we could use different
poperties per Trait usage in the getter/setter.
A better aproch would be usage of templates, so the setter assignment can depend on trait inlusion:
Like
trait TestTrait
{
protected $<MyTraitVar> = null;
public function setMethod($value) {
$this-><MyTraitVar> = $value;
}
public function getMethod() {
return $this-><MyTraitVar>;
}
}
class TestClass {
use TestTrait as TestTrait1, TestTrait as TestTrait2 {
TestTrait1::<MyTraitVar> as MyVar1;
TestTrait2::<MyTraitVar> as MyVar2;
TestTrait1::setMethod as setMethod1;
TestTrait2::setMethod as setMethod2;
TestTrait1::getMethod as getMethod1;
TestTrait2::getMethod as getMethod2;
}
}
Previous Comments:
------------------------------------------------------------------------
[2013-02-18 00:36:07] php-bugs at lists dot php dot net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.
------------------------------------------------------------------------
[2012-11-28 09:55:11] gron@php.net
What about:
$backtrace=debug_backtrace();
echo $backtrace[0]['function'];
That seems to be also the common solution for getting the name of the calling
function.
------------------------------------------------------------------------
[2012-11-28 09:50:56] laruence@php.net
could you explain a little more: what i " some interesting dynamic behavior" ?
I mean , the real use case.
------------------------------------------------------------------------
[2012-11-27 18:52:27] spamfreedave-zend at yahoo dot com
Description:
------------
I would like my trait functions to know what alias (if any) was used to call them.
The idea came from discovering that you can give a trait function multiple aliases (see Test
Script).
It occurs to me that you could have some interesting dynamic behavior if the trait function was able
to determine what name (alias) was used to call it.
If possible, a new constant __ALIAS__ could be created to store this value.
Thank you for your consideration.
Test script:
---------------
<?php
trait TestTrait
{
public function test() { print __FUNCTION__ . ', ' . __ALIAS__ . "\n"; }
}
class TestClass
{
use TestTrait { test as test2; test as test1; }
}
$c = new TestClass();
$c->test1();
$c->test2();
Expected result:
----------------
test, test1
test, test2
Actual result:
--------------
test, __ALIAS__
test, __ALIAS__
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=63629&edit=1
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