Andrea Faulds wrote (on 04/08/2014):
On 4 Aug 2014, at 01:53, Thomas Bley <ma...@thomasbley.de> wrote:
from userland perspective, I would prefer to open the Closure constructor
instead of adding new syntax:
$qux = new FooBar(3);
// $func = &FooBar::getStatic;
$func = new Closure(array('FooBar', 'getStatic'));
$func($qux); // 3
You can actually do that already in a convoluted way:
$func = (new ReflectionMethod(“FooBar::getStatic”)->getClosure());
Though it must be explicitly bound in the case of a non-static method.
The advantage of a constructor / factory method approach is that it
allows you to promote existing "callable" arguments to Closures. If
passed a Closure, it could return it unchanged. Thus:
function rebind_callable(callable $c, $newthis) { return (new
Closure($c))->bindTo($newthis); }
$foo_rebound = rebind_callable( [$foo, 'doSomething'], $bar );
I guess the disadvantage is it requires an intermediate value
(string/array) rather than being something as low-level as a parser
rule. I tend to agree with Stas that overloading the & operator here
could be confusing.
--
Rowan Collins
[IMSoP]
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