2013/2/25 Nikita Popov <nikita....@gmail.com>
> Hi internals!
>
> PHP 5.4 added support for expressions of the kind (new Foo)->bar(), (new
> Foo)->bar and (new Foo)['bar'].
>
> I'd like to extend this support to any expression instead of just new.
>
> Why should be do this? Because it's just an arbitrary restriction. Removing
> it would for example allow clone calls in the parens, so you could do
> something like (clone $date)->modify('...'). Which - you may have already
> noticed this - is more or less a replacement for the DateTimeImmutable
> class that was added for 5.5 (with the nice benefit of being fully
> compatible and not being an object oriented abomination :) That's just one
> example, but I think there are a lot more (especially if you also consider
> that it allows array dereferencing too). One further use that is of
> interest to me personally is for https://github.com/nikic/scalar_objects,
> so I can do calls like ("foo")->bar().
>
> Out of curiosity, will the parser blow up if we remove the requirement for
parentheses, so that things like "foo"->bar() would be possible?
> A nice side benefit from this is that it removes a shift/reduce conflict
> from the parser.
>
> The patch for the change can be found here:
> https://github.com/php/php-src/pull/291/files. It's a very simple patch,
> it
> basically just changes one parser rule and adjusts the allowed opp types
> for some opcodes. The rest is just the vm regeneration for the new op
> types.
>
> I hope that this change is trivial enough to not require dragging it
> through the whole RFC process. If there are no objections I'd commit it
> sometime soon.
>
> Thoughts?
> Nikita
>
