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Thread-Topic: Opt-in "use function *;" for skipping check for function/const
 in alternate namespace 
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Date: Thu, 28 Nov 2019 23:33:51 +0000
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X-Envelope-From: <tysonandre775@hotmail.com>
Subject: Re: Opt-in "use function *;" for skipping check for function/const in
 alternate namespace
From: tysonandre775@hotmail.com (tyson andre)


My previous message can be seen at https://news-web.php.net/php.internals/1=
07887=0A=
(marc.info seems to show it as base 64 encoded text.)=0A=
It links to a PR https://github.com/php/php-src/pull/4951 implementing this=
=0A=
=0A=
>A more cosmetic consideration is that the more generic the syntax looks, =
=0A=
>the more people will want it to work for other use cases. I can imagine =
=0A=
>"use function * works but use Foo\* doesn't" ending up on websites like =
=0A=
>PHPSadness. A more specific statement, like a declare, or "use global =0A=
>functions", is more obviously a one-off.=0A=
=0A=
Good point. My original thinking was that it'd allow `use function Foo\*;` =
to be used in the future, but:=0A=
=0A=
- With the way namespaces work, using more than one "wildcard" would result=
 in unintuitive behavior.=0A=
  (based on what files were loaded at call time, and what the order of the =
`use` was.=0A=
=0A=
  Also, instead of checking 2 namespaces, php would have to check an arbitr=
ary list of namespaces.=0A=
- People new to the language would assume `count` would keep working =0A=
  despite adding `use function Foo\*;` (e.g. seeing that require/print/isse=
t/empty/eval resemble functions,=0A=
  and would continue to work)=0A=
=0A=
Also, there's the large difference between PHP and Python/Java.=0A=
The functions in the module are known at the time of import for those, but =
not for "use" in PHP.=0A=
=0A=
So rethinking it, something non-generic like "use global functions;" would =
be my preference.=0A=
=0A=
Initial plan for a voting structure:=0A=
1. Whether a way to opt into exclusively checking global functions and cons=
tants should exist=0A=
2. Whether this should be part of declare(lookup_functions_in_current_names=
pace=3D1) or a "use" statement, if it does exist=0A=
3. The preferred "use" syntax, if there is not clear preference ("use globa=
l functions;" or "use function *;" or otherwise)=0A=