ADT, SPL

Stanislav Malyshev wrote:

Can't it be done without keeping another copy of entire Zend engine?

As Sterling already mentioned, it should be merged into Zend at some
point in time, preferably before PHP 5 :)

--
Sebastian Bergmann
http://sebastian-bergmann.de/ http://phpOpenTracker.de/

     http://www.professionelle-softwareentwicklung-mit-php5.de/

SB>> > Anybody cares to explain what SPL is?
SB>>
SB>> http://cvs.php.net/cvs.php/spl

From the initial look at the code, it seems it contains a large parts of
duplicated engine code. Which means, unless I am missing something,
constant maintenance nightmare. Can't it be done without keeping another
copy of entire Zend engine?

SPL, or at least the parts I'm interested in provide a standard set of
interfaces for PHP5, and then it overloads certain ops to allow for, for
example, foreach() overloading. So you can do:

class PHP_Devs implements spl_iterator {
function next() {
return $nextphpdev;
}
}

$p = new PHP_Devs;

foreach ($p as $dev) {
echo $p;
}

This stuff is very useful, especially internally (its actually only the
internal ramifications that i personally care about). Imagine
developing a database extension, where you can go:

$result = $sth->result;
foreach ($result as $row) {
echo $row[0];
}

And every part of that is overloaded, and lazy initialized. That
provides a great speed boost compared to the traditional database
extensions (you save a lot of unnecessary function calls, and in some
cases, fetches).

Marcus can probably expound on some of the other features of SPL.

-Sterling

--
"Microsoft isn't evil, they just make really crappy operating systems."
- Linus Torvalds