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

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.

Nikita