Re: [PATCH] bracketed namespace declarations
| From: | Stan Vassilev | FM | Date: | Fri, 07 Nov 2008 21:49:36 +0000 |
| Subject: | Re: [PATCH] bracketed namespace declarations | ||
| References: | 1 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-41768@lists.php.net to get a copy of this message | ||
Sorry for the second email, I just forgot to mention something regarding how use statements apply from global scope to namespace x {}.
The best way regarding realworld usage and existing state of the art would be to take into account the use statements in the scope above and apply the use statements inside the scope after them.
So if I write this:
<?php
use A;
use B;
namespace {
use C;
}
?>
In the namespace, it's the same as if I wrote use A, B, C in that order explicitly. Implemented this way, in a future version of PHP we could allow this typical scenario (which I suspect won't work with this patch?):
<?php
use A;
function foo() {
use B; // use A applies implicitly, use B applied only for the scope of the function
...code...
}
?>
Which code above is in fact a sugared version of what is actually happening:
<?php
use A;
function foo() { namespace {
use B; // use A applies implicitly, use B applied only for the scope of the namespace scope
...code...
} }
?>
The above significantly helps with larger function/class libraries in a single file, as you can make your use statements more local (typically you will use certain classes globally, and most locally in a function/method), and is supported by most modern languages that handle namespaces.
Regards, Stan Vassilev