Re: [PHP-DEV] [VOTE] Abstract Syntax Tree

On Wed, Aug 20, 2014 at 2:57 PM, Nikita Popov <[email protected]> wrote:

> On Wed, Aug 20, 2014 at 3:30 PM, Paul Dragoonis <[email protected]>
> wrote:
>
>> Hi Nikita,
>>
>> I second some of Andi's concerns about behavioural changes, some things
>> working from right-to-left and not left-to-right. Are these things that we
>> can adapt the AST part or tweak another part to make this more consistent
>> with previous versions of PHP. Improving consistency when changing
>> underlying parts is a good migration technique. Facebook done this when
>> they implemented HHMV, they didn't fix bugs but made a like-for-like stable
>> copy before tackling improvements.
>>
>> Do you feel it's an important goal to keep consistency from PHP 5.x to
>> PHP 7, with regards to the behaviour of syntax parsing/behaviour, or do you
>> feel that you can live with these non-BC changes?
>>
>> Many thanks,
>> Paul
>>
>
> Is there some *particular* change that concerns you? This is something
> that needs to be decided on a case-by-case basis. The RFC contains a list
> of changes. All of them are minor adjustments verging on bug fixes, which
> imho are all within the bounds of reasonable changes for a major version.
> However if you can provide argument why one of the listed changes is
> incorrect (as in, introduces less intuitive/consistent/... behavior) or has
> larger BC impact than anticipated, then I'm open to discussion that.
>

I will get back to you with some specific use cases that I see could be
potentially problematic and non-intuitive.


>
>
> Nikita
>