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Date: Mon, 2 Sep 2013 14:48:04 +0200
Message-ID: <CAOWwgp=6wSCWOGo4YHcVT5r15s_+zA2GbfvZsbEAbfM-mOofMg@mail.gmail.com>
To: Anthony Ferrara <ircmaxell@gmail.com>
Cc: "internals@lists.php.net" <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=047d7b604d02e7908704e565fcec
Subject: Re: [PHP-DEV] Re: Function autoloading
From: nicolas.grekas+php@gmail.com (Nicolas Grekas)

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Content-Type: text/plain; charset=ISO-8859-1

>
>  namespace foo {
>     something(); // autoloaded as "something"
> }
>

That makes sense *for me* for many reasons, but IMHO that's too confusing
for a wider adoption.
Because this doesn't work for function foo\strlen, the only reasonable way
to work with such an autoloader would be to avoid using dynamic namespace
resolution by always using some "use function" or "use namespace".
That's very fragile...

I order not to be the one who kills a proposal and be constructive:

Would some kind of namespace initializers be a good idea?

That could work this way:

Any time a non existing function or constant is required, a registered
namespace initializer would be loaded. The big difference being that it
would happen *BEFORE* fallback namespace resolution. The registered
namespace loader would be given only the namespace part of the required
symbol, and that would happen only once per namespace.

That would have a performance impact, but I would be interested in seeing
real benchmarks. May be we can find a way to make the mechanism light
enough.

For this performance reason, I would suggest having a registering function
that take the exact namespace for which the loader matches as first
argument:
spl_namespace_register($namespace[, callable $autoload_function)

$autoload_function would be called only for symbols in $namespace.

What do you think ?
Is it worth discussing that further?

Nicolas

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