Edit report at https://bugs.php.net/bug.php?id=34502&edit=1
ID: 34502
Updated by: ni...@php.net
Reported by: goat at daholygoat dot com
Summary: method chaining on constructor causes parse error
-Status: Open
+Status: Closed
Type: Feature/Change Request
-Package: Feature/Change Request
+Package: *General Issues
Operating System: Linux
PHP Version: 5.0.5
-Assigned To:
+Assigned To: nikic
Block user comment: N
Private report: N
New Comment:
Closing as PHP 5.4 supports with with the (new A)->b() syntax.
Previous Comments:
------------------------------------------------------------------------
[2010-06-15 21:05:58] jacob at jacobweber dot com
Here's a workaround: use a static factory method:
class A {
public static function create($str) {
return new A($str);
}
...
}
echo A::create("hello")->returnStr();
------------------------------------------------------------------------
[2010-02-14 23:34:49] jaka at kubje dot org
You're complicating things too much.
You can solve this by simply making 'new' bind stronger than '->'.
And even if it doesn't, this should still work:
(new A('foo'))->someMethod();
------------------------------------------------------------------------
[2009-07-18 21:38:04] spidgorny at gmail dot com
Here's the ugly trick how to do object instantiation and chaining in one line:
$view->loginForm = end($_ = array(
$l = new Login(),
$l->render()->chain()->everything()->you()->like()
));
$_ and $l are two unnecessary variables. I told you - it's ugly.
Anybody can make it better?
Any ETA for implementing it in PHP directly?
Hello visitor. Please vote.
------------------------------------------------------------------------
[2005-09-16 10:00:51] goat at daholygoat dot com
@Johannes:
I don't really get your interpretion of the problem. A() is of course the
constructor (A() in A). The constructor returns an object of type A.
returnStr() is a method of A, so when calling returnStr() on a new A(), it
should invoke returnStr() on a new object of A. For example, in Java it's fine
to do this:
System.out.println(new Object().toString());
Which makes sense because when you _can_ do method chaining (which you can in
PHP5), there are many times where you just want to call one chain on a new
object, instead of seperately instantiating the class.
So I have to go with Derick pointing out it's simply not supported right now.
------------------------------------------------------------------------
[2005-09-14 23:25:33] johan...@php.net
By reading the code I'd expect that A is some function
returning an object. returnStr() being a method of that
object returning a class name used for new. (Somehow a
combination of "new $a;" and a simple
"function_call()->methodCallOnReturnedObject()" which is
possible since PHP 5) I would like some syntax like this,
too - but thinking about it I see too much confusion and
didn't find a nice solution which is clear when reading
code.
I set this to bogus since I think it's too much confusion,
but if you have a nice and clear syntax feel free to
re-open it - I'd be happy, but don't see how this is
possible without logic conflicts :-)
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