Bug #64235 [PATCH]: Insteadof not work for class method in 5.4.11
Edit report at https://bugs.php.net/bug.php?id=64235&edit=1
ID: 64235
Patch added by: larue...@php.net
Reported by:imenem at inox dot ru
Summary:Insteadof not work for class method in 5.4.11
Status: Feedback
Type: Bug
Package:Scripting Engine problem
Operating System: Debian GNU/Linux
PHP Version:5.4.11
Assigned To:dmitry
Block user comment: N
Private report: N
New Comment:
The following patch has been added/updated:
Patch Name: deny_use_with_classes.patch
Revision: 1361437796
URL:
https://bugs.php.net/patch-display.php?bug=64235&patch=deny_use_with_classes.patch&revision=1361437796
Previous Comments:
[2013-02-20 19:33:35] dmi...@php.net
I agree with Stefan.
I think we have to allow only trait names in context of "as" and "insteadof"
statements. Stefan showed a simple workarounds for class names.
I don't think we should fix the behavior we had in early 5.4 versions by
mistake.
[2013-02-20 16:22:55] re...@php.net
currently using class in context of trait 'as' and 'inteadof'
didn't work most of the time (as the code below demonstrated, even after apply
the patch
larucence attached). Only the use case of this bug report, it HAPPENED to work.
To keep the BC of the problem reported, as I suggested in the previous patch we
could
mark it as deprecated in 5.4.
So forbid class in 'as' and 'insteadof' didn't break because most of them
didn't even work.
in the case of parent class insteadof usage, the REAL need is avoid trait's
method overwrite
the method inherited but not refer to parent class.
there is a really easy workaround: rename the conflict method as
a new one `Traits::method as _use_less` or something else,
if we really need the method from parent.
undefined
method
StandAlone::foo as bar; // Child::bar() -> undefined method
StandAlone::foo as foo; // Child::foo() -> "Trait"
GrandParent::foo as bar; // Child::bar() -> undefined method
/* insteadof */
Parent::foo insteadof T; // works by accident -> "Parent"
GrandParent::foo insteadof T; // -> "Parent" but not "Grand"
StandAlone::foo insteadof T; // ->"Parent"
}
}
[2013-02-20 14:40:32] larue...@php.net
@Stefan the current patch is allow use insteadof with classes (as the reporter
said, it used to works),
and forbid use "as" with classes (5.4.11 will result in an unexpected FATAL
error "undefined method", which is very confused message), the new solution is
trigger compiler ERROR
so, for the current patch, I think it is consistent with before, no need to be
RFCed again.
however, if we decide to forbind using both 'as' and 'insteadof' with classes,
that definitely need a RFC
[2013-02-20 13:20:15] g...@php.net
Hi:
The `insteadof` and `as` operators where not intended to be used with classes.
The syntax is intended to convey that the use operation is refined by
specifying how to
resolve conflicts __between__ traits.
That's the idea at least.
My solution for the initial problem presented would be to provide a method such
as follows in
the TestChildClass:
public function method() {
parent::method();
}
I understand that this is not ideal, and requires you to repeat yourself.
However, it is consistent in the sense that traits are traits and not classes,
and both get
mixed up as little as possible,
However, beside the academic notion of purity, I can see that
`TestParentClass::method
insteadof TestTrait;` is useful.
[I wonder whether `parent::method insteadof TestTrait;` should be supported as
well.]
Laruence's example with `TestParentClass::method as methodParent;` is however
problematic.
Traits are not supposed to conflict with classes, but with traits. So, allowing
the
introduction of aliases for method of the super class seems to me as something
that is
problematic, because it mixes up the concepts.
If you need an alias for the method of a parent class, the classic way would be:
public function foo() {
parent::bar();
}
No?
Well, that's my point of view.
So, from a practical point of view, referring to the parent (and only the
direct parent) class
in `insteadof` might be a useful/acceptable feature.
The use in conjunction with `as` seems to be something I would advocate against.
In either way, beside bugs that made this possible in the first place, I would
consider both
ideas as new features that need to be documented/discussed.
I thought that we had a test that only the traits listed in the `use` clause
can be used for
the `as`/`insteadof` operators, but
Bug #64235 [PATCH]: Insteadof not work for class method in 5.4.11
Edit report at https://bugs.php.net/bug.php?id=64235&edit=1 ID: 64235 Patch added by: larue...@php.net Reported by:imenem at inox dot ru Summary:Insteadof not work for class method in 5.4.11 Status: Feedback Type: Bug Package:Scripting Engine problem Operating System: Debian GNU/Linux PHP Version:5.4.11 Assigned To:dmitry Block user comment: N Private report: N New Comment: The following patch has been added/updated: Patch Name: bug64235.patch Revision: 1361347678 URL: https://bugs.php.net/patch-display.php?bug=64235&patch=bug64235.patch&revision=1361347678 Previous Comments: [2013-02-20 08:04:11] dmi...@php.net It's hard to say what is expected :) I thought only traits may be used in context of "insteadof", now I'm not sure. I sent the question to Stefan Marr. Lets wait for his opinion. [2013-02-20 08:00:02] re...@php.net insteadof and 'as' bother for traits, I thought after the trait refactor, it's works as expected. If we keep 'insteadof' could been used for class method as feature I'm fine:0 [2013-02-20 07:58:32] dmi...@php.net Yet another traits mess :( I suppose, it worked in 5.4.4 because of mistake. RFC and traits documentation don't say if class names may be used in context of "as" and "insteadof" operators. In my opinion, class names must not be used in contest of "as". However, their usage in context of "inseadof" may make sense (I'm not sure). Anyway, it has to be defined in documentation first. [2013-02-20 07:44:12] larue...@php.net fix attached, which fix this bug, and trigger fatal error in compile time for the test script I pasted before. [2013-02-20 07:41:23] larue...@php.net The following patch has been added/updated: Patch Name: bug64235.phpt Revision: 1361346083 URL: https://bugs.php.net/patch-display.php?bug=64235&patch=bug64235.phpt&revision=1361346083 The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=64235 -- Edit this bug report at https://bugs.php.net/bug.php?id=64235&edit=1
Bug #64235 [PATCH]: Insteadof not work for class method in 5.4.11
Edit report at https://bugs.php.net/bug.php?id=64235&edit=1 ID: 64235 Patch added by: larue...@php.net Reported by:imenem at inox dot ru Summary:Insteadof not work for class method in 5.4.11 Status: Assigned Type: Bug Package:Scripting Engine problem Operating System: Debian GNU/Linux PHP Version:5.4.11 Assigned To:dmitry Block user comment: N Private report: N New Comment: The following patch has been added/updated: Patch Name: bug64235.phpt Revision: 1361346083 URL: https://bugs.php.net/patch-display.php?bug=64235&patch=bug64235.phpt&revision=1361346083 Previous Comments: [2013-02-20 07:39:40] larue...@php.net The following patch has been added/updated: Patch Name: bug64235.patch Revision: 1361345980 URL: https://bugs.php.net/patch-display.php?bug=64235&patch=bug64235.patch&revision=1361345980 [2013-02-20 07:15:37] larue...@php.net actually, I was looking into this, I have thought the similar fix of you, but unfortunatly, it is wrong, thinking of this: methodParent(); ~ [2013-02-20 07:00:53] re...@php.net Hi dmitry, will you take a look please. [2013-02-18 11:58:23] imenem at inox dot ru Description: In PHP 5.4.4 test script works as expected, in 5.4.11 script caused fatal error. Test script: --- method(); (new TestChildClass)->methodAlias(); Expected result: Parent method Trait method Actual result: -- Fatal error: Trait TestParentClass is not used in test.php on line 28 -- Edit this bug report at https://bugs.php.net/bug.php?id=64235&edit=1
Bug #64235 [PATCH]: Insteadof not work for class method in 5.4.11
Edit report at https://bugs.php.net/bug.php?id=64235&edit=1 ID: 64235 Patch added by: larue...@php.net Reported by:imenem at inox dot ru Summary:Insteadof not work for class method in 5.4.11 Status: Assigned Type: Bug Package:Scripting Engine problem Operating System: Debian GNU/Linux PHP Version:5.4.11 Assigned To:dmitry Block user comment: N Private report: N New Comment: The following patch has been added/updated: Patch Name: bug64235.patch Revision: 1361345980 URL: https://bugs.php.net/patch-display.php?bug=64235&patch=bug64235.patch&revision=1361345980 Previous Comments: [2013-02-20 07:15:37] larue...@php.net actually, I was looking into this, I have thought the similar fix of you, but unfortunatly, it is wrong, thinking of this: methodParent(); ~ [2013-02-20 07:00:53] re...@php.net Hi dmitry, will you take a look please. [2013-02-18 11:58:23] imenem at inox dot ru Description: In PHP 5.4.4 test script works as expected, in 5.4.11 script caused fatal error. Test script: --- method(); (new TestChildClass)->methodAlias(); Expected result: Parent method Trait method Actual result: -- Fatal error: Trait TestParentClass is not used in test.php on line 28 -- Edit this bug report at https://bugs.php.net/bug.php?id=64235&edit=1
