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To: Nikita Popov <nikita.ppv@gmail.com>, PHP internals
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Thread-Topic: [PHP-DEV] [RFC] Syntax for variadic functions
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Subject: RE: [PHP-DEV] [RFC] Syntax for variadic functions
From: jbondc@openmv.com ("jbondc@openmv.com")

On Wed Aug 28 11:47 AM, Nikita Popov wrote:
>=20
>     https://wiki.php.net/rfc/variadics=20

Interesting idea, expanding on:

function log($message, ...$options) {}

It would seem convenient to allow ...$options to be passed as a key-value a=
rray of arguments as well:
function logA($message, ...$options[]) {  echo count($options); }

logA("foo"); // 0
logA("foo", 1, 2); // 2
logA("foo", array(1,2,3)); // 3

The difference here is that variadic options is declared as an optional arr=
ay, it would not support a 'typehint' forcing all arguments to be of the sa=
me type.
It could be a way to support ~ named parameters

// requires at least 1 argument named as 'level'
function logB($message, ...$options['level']) {
   echo $options['level'] .' '. count($options);
}

logB("foo");                                    // fails: 'level' argument =
missing
logB("foo", 'notice');                   //notice 1
logB("foo", ['level' =3D> 'notice']); // notice 1
logB("foo", 'notice', 'extra'); // notice 2
logB("foo", ['level' =3D> 'notice'], 'extra'); // notice 2

// requires min 2 arguments
function logC($message, ...$options['level','priority']) {
   echo 'level:'. $options['level'];
   echo 'priority:'. $options['priority'];
}
logC("foo", "notice", 4);                                   =20
logC("foo", ['level' =3D> 'notice', 'priority' =3D> 4]);

That would remove the need for a "splat" or "scatter" operator. The declara=
tion "...$options[]" would mean, I accept an array of arguments followed by=
 extra arguments