Hi,
On Wed, 2010-05-19 at 13:03 +0200, fqqdk wrote:
> 2010/5/19 Tjerk Anne Meesters <datib...@php.net>
> > I wrote a small article that gives an idea of the speed differences:
> > http://shwup.blogspot.com/2010/04/about-constants.html
Unfortunately this doesn't tell, what you actually measured. And note
that as of 5.3 the "class constant" syntax can be used in the global
scope, too.
> How about extending the usage of the 'final' keyword to support a java-like
> syntax?
No. We have a const keyword. Rather somebody interested in this topic
might try to come up with a patch to at least allow "constant
expressions" this should serve most needs.
constant expressions might be stuff like __DIR__.'/foobar.php' or
CONST_A | CONST_B.
We already have two steps in the constant resolution for constructs like
these:
php > class A { const C = FOOBAR; }
php > define('FOOBAR', 42);
php > echo A::C;
42
See zval_update_constant_ex in zend_API.c as a starting point. While
such an approach would also require some parser work and some clever
idea where/how to store the expression to be evaluated etc.
johannes
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