---- En vie, 08 may 2020 15:07:13 +0200 Dan Ackroyd <dan...@basereality.com>
escribió ----
> On Fri, 8 May 2020 at 07:49, Manuel Canga <p...@manuelcanga.dev> wrote:
> >
> > What is your opinion ? Do you see it useful ?
>
> I can see the need; I strongly dislike the idea of using references for this.
>
> What you're describing is a form of 'out parameters' which have been
> mentioned a few times before on this list.
>
> I've made a note of the general idea here:
> https://github.com/Danack/RfcCodex/blob/master/out_parameters.md
>
> Though the wikipedia article is also good:
> https://en.wikipedia.org/wiki/Parameter_(computer_programming)#Output_parameters
>
> Using references for things like this is a bad idea as references make
> it hard to reason about code. In this specific case, having the
> function mutate the existing variable is horrible.
Hi, Dan,
I think nothing is bad practice. It depends of context.
Example: global variables, __set/__get, public properties and so on could be
considered bad practices,
however, they sometimes are useful.
References could be a priori bad idea, but if you limit your their
dangerousness, they will be less bad.
>
> > If nobody objects to this RFC
>
> While you categorically must do what you must, I don't think you will
> get much benefit from raising this as an RFC until you find someone
> who can and is willing to implement it.
I agree :'(
>
> Actually, just finding any core contributor who is willing to say that
> they would back this idea might be a good idea.
>
> And yes, phpinternals could still really do with an 'informal but only
> to open to voters' feedback mechanism. Someone should do something
> about that....wait I'm _someone_. And I have wiki permissions.
>
> So here's a page for a non-binding 'indication of interest' poll:
> https://wiki.php.net/indication_of_interest/keep_type_of_reference_params
Thanks so much, Dan
>
> If anyone disagrees with the text, either please suggest a change or
> edit it if you have karma.
I'd add( but I don't have karma ):
Add a new`inout` keyword( very similar to 'inout' of Hack ) in order to:
- Check type of out is equal to type of param( like example of my first email
).
- Avoid modifying caller variable value when the function throws an exception.
( Thanks to Mathew for link to inout* of Hacker language )
- Allow explicit call-site pass-by-reference annotation. ( Thanks to Rowands
for link** to Nikita's RFC )
* https://docs.hhvm.com/hack/functions/inout-parameters
** https://wiki.php.net/rfc/explicit_send_by_ref
> cheers
> Dan
> Ack
Thanks again, Dan,
Regards
--
Manuel Canga
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