On 22.02.2008, at 06:56, Gregory Beaver wrote:
Another detail: The implementation of the parser changes should still
allow a class or function called "trait", i.e. "trait" should only
be a
keyword at specific positions in the source to avoid unneccesary BC
breaks. The current patch has this BC problem.
This is not possible to implement, having tried to do a similar thing
for 'import' and 'namespace.' The reason is that we can encounter a
classname at any point thanks to "classname::whatever" syntax, so it
slows the lexer down a bit in that for every T_TRAIT we would have to
check to see if the next 2 characters are ::, and makes the lexer
uber-complicated. It's a big mess.
Not yet at any rate. From what I hear the next step after migration to
re2c [1] is to migrate to lemon, which should make stuff like this
possible. However while re2c has a chance of making it into PHP 5.3,
the lemon part seems a bit further off.
regards,
Lukas
[1] http://blog.somabo.de/2008/02/php-on-re2c.html
--
PHP Internals - PHP Runtime Development Mailing List
To unsubscribe, visit: http://www.php.net/unsub.php
