Re: Idea for better function callbacks (another syntactic sugar)

On Fri, Oct 26, 2018 at 9:57 AM Kalle Sommer Nielsen <kalle@php.net> wrote: > > Den fre. 26. okt. 2018 kl. 17.43 skrev Larry Garfield <larry@garfieldtech.com>: > > I believe the proposal for short lambas (which should get resurrected at some > > point) would handle this case well enough as well as help a dozen other > > things. To wit: > > > > array_filter($names, |$x| ==> trim($x)) > > I still fail to see why it would be considered to have that over a > perfectly encapsulted string for a callback, using a lambda/closure is > just an extra runtime call for syntax sugar, that seems poor in my > eyes. > > What would be ideal here, would be for functions to be first class > citizens in callback contexts, like in C to avoid the quotation, > however it clashes with constants. A hack you can do in userland could > be something like: > > const trim = 'trim'; > array_filter($names, trim); In my opinion "ideal" here is that our symbol tables are merged, so referring to "trim" in any context will resolve to at most one symbol, *and* that we also have a short-closure syntax for times when there isn't a *perfect* function to use. In the next version of PHP I would really like to see some warnings for when symbol names get re-used so that in the future we can merge them with less of a BC break.