Let me see if I'm understanding you correctly, because that sounds like the
line I'd been thinking along.
----------
function baz() {
$var = 5;
$foo = function($a, $b) {
lexical $var;
return $a + $b + $var;
}
return $foo;
}
$func = baz();
function bar($func) {
return $func(2, 3);
}
echo bar($foo); // prints 10
----------
Right? Would it be possible to push the heavy lifting onto the compiler
rather than runtime in the above case?
I'm assuming that making the function above GC-able would be a herculean task
at this point, based on previous comments, but I do not actually know myself.
On Monday 17 December 2007, Jeff Moore wrote:
> Hello,
>
> Reading the prior discussion, I think either $_SCOPE['x'] or the
> lexical $x syntax is fine for accessing local variables in the
> enclosing scope. But closures also should also support $this and
> static:: when the closure is defined in a method.
>
> I think a solution for closures should add a new variable type. That
> way, the code can compiled at compile time, while the enclosing
> context (local variables plus $this for methods) can be captured at
> run time in the new variable type. Also, when the closure value is
> garbage collected, the references to the enclosing scope and object
> instance can also be freed.
>
> Additionally, the callback psuedo-type could be promoted to the new
> type, with the string or array representation converted when
> required. It wouldn't be necessary, but a callback literal along the
> lines of Array() could also be added to make the conversion
> unnecessary. I find the following to be easier to understand:
>
> set_error_handler(Callback("foo"));
>
> Than
>
> set_error_handler("foo");
>
> The current syntax would still work because of automatic type
> conversion.
>
> Best Regards,
>
> Jeff
--
Larry Garfield AIM: LOLG42
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exclusive property, it is the action of the thinking power called an idea,
which an individual may exclusively possess as long as he keeps it to
himself; but the moment it is divulged, it forces itself into the possession
of every one, and the receiver cannot dispossess himself of it." -- Thomas
Jefferson
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