I'm very concerned about the practical consequences of introducing traits without state.
Lacking support for properties (state) in traits, programmers will immediately start hacking properties in anyway. I see two approaches: A. They could do this using static hashes in global variables or a separate class. The result is a garbage collection failure as these references to $this will never go away. Designed-in GC failures are unacceptable post PHP 5.3. B. PHP allows you to define properties at runtime. That is, you can write: $this->title = 'my title'; Without declaring var $title; at the class level. But PHP 6 seems to be moving toward more strictness, not less, and this style encourages the use of undeclared variables with the resulting potential for missed bugs. * * * Also, the 'instead' keyword is baffling - it could mean replace A with B or replace B with A depending on how you place your mental comma - I much prefer the assignment syntax alternative, or 'insteadof' which is unambiguous. On Wed, Oct 14, 2009 at 4:07 PM, Lukas Kahwe Smith <m...@pooteeweet.org> wrote: > > On 14.10.2009, at 22:03, Stanislav Malyshev wrote: > >> Hi! >> >>>> So lets warm this up again. >>>> HEAD is for development .. so lets get this into HEAD so that it will be >>>> part of the next bigger PHP release for sure! >>> >>> Well, the code is sitting here >>> http://github.com/gron/php-src/tree/PHP_6-traits >>> and waits to be merged. :) >> >> I thought before merging code it would be useful to have some discussion >> on if the code is actually doing what we want. If it's based on >> http://wiki.php.net/rfc/horizontalreuse then for example I can see some >> potential issues for bytecode caching related to renaming and changing >> visibility. >> Also, it is not clear that we want grafts there at all, some aspects of >> them seem to get too hairy, esp. $this issue or statics. >> > > i think Stefan is fully aware of that probably there will be a discussion > first .. > but i think we all agree that this feature is very high on the list of what > people want and therefore i wanted to get this discussion going, so that > after its concluded traits can be commited to HEAD. > > regards, > Lukas Kahwe Smith > m...@pooteeweet.org > > > > > -- > PHP Internals - PHP Runtime Development Mailing List > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Tom Boutell P'unk Avenue 215 755 1330 punkave.com window.punkave.com -- PHP Internals - PHP Runtime Development Mailing List To unsubscribe, visit: http://www.php.net/unsub.php
