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Date: Tue, 22 Jul 2008 13:04:03 +0200
Subject: closures questions
From: mls@pooteeweet.org (Lukas Kahwe Smith)

Hi,

I am sending this on behalf of Kalle:

1) Closures on class properties just don't work, the only way to do it  
is
to do something like:

$c = $a->b;
$c();

Calling: $a->b(); will result in method A::B() does not exists.

2) Closures can be defined as constants values because of its toString  
method:

define('Closure', function(){ echo 'Test'; });

echo constant('Closure'); /* (string) Closure object */

3) Since Closures have this toString method, but its not showing up in  
Reflection:

Reflection::export(new ReflectionClass('Closure'));

4) var_export() and Closures is useless, any call to var_export() like  
the example
below will all be the same:

$lambda = function()
{
     echo '&#923; Lambda';
};

var_export($lambda);

/*
Closure::__set_state(array(
))
*/

Maybe it could return some relevant information for exporting the  
closure across
data

5) Its impossible to clone a closure using the cloning keyword:

$a = function(){};
$b = clone $a;

This makes it hard to make a copy of the closure because of objects  
always are
passed by reference.

regards,
Lukas Kahwe Smith
mls@pooteeweet.org