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To: "'Aimeos | Norbert Sendetzky'" <norbert@aimeos.com>,
	<internals@lists.php.net>
References: <461958fe-182e-59bf-9fdb-b110fd09e2b2@aimeos.com>
In-Reply-To: <461958fe-182e-59bf-9fdb-b110fd09e2b2@aimeos.com>
Date: Mon, 18 Nov 2019 16:54:03 +0800
Message-ID: <003201d59ded$ba7d6e10$2f784a30$@jhdxr.com>
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Feedback-ID: Yeas:jhdxr.com:qybgforeign:qybgforeign7
Subject: RE: [PHP-DEV] Concept: "arrayable" pseudo type and \Arrayable interface
From: me@jhdxr.com (=?utf-8?b?Q0hVIFpoYW93ZWk=?=)

The union types RFC passed, so I didn't see much value in the arrayable =
pseudo except pressing less keys.=20

Regarding the Arrayable interface, or toArray method. Since it extends =
Iterator, iterator_to_array can do the job already.=20
So what's the benfits for introducing this new interface?=20

I would suggest to find a way to make those built-in array_* functions =
support the arraylike objects, no matter which interface it requires, =
existing ArrayAccess, or any new interface.

Regards,
CHU Zhaowei

> -----Original Message-----
> From: Aimeos | Norbert Sendetzky <norbert@aimeos.com>
> Sent: Sunday, November 17, 2019 10:41 PM
> To: internals@lists.php.net
> Subject: [PHP-DEV] Concept: "arrayable" pseudo type and \Arrayable
> interface
>=20
> Since PHP 7.1 there's the "iterable" pseudo type hint that matches =
"array"
> and "Traversable".
>=20
> PHP frameworks would profit from support of an "arrayable" pseudo type
> hint that matches "array" and all objects that implements =
"Traversable",
> "ArrayAccess" and "Countable".
>=20
> Thus, we could pass arrays or all objects that behave like arrays to =
methods
> and do:
>=20
> function useArrayable( arrayable $arg ) : arrayable {
>     $cnt =3D count( $arg );
>     $value =3D $arg['key'];
>     foreach( $arg as $key =3D> $entry ) { ... }
>     return $arg;
> }
>=20
> It would be useful to implement an Arrayable interface too:
>=20
> interface Arrayable extends \Iterator, \Countable, \ArrayAccess {
>     public function toArray() : array;
> }
>=20
> Then, we can use array like objects:
>=20
> class Test implements \Arrayable
> {
>     // ...
> }
>=20
> $arrayable =3D new Test();
> $arrayable['key'] =3D $value;
> $arrayable =3D useArrayable( $arrayable );
>=20
> And if necessary, we can convert them to native arrays:
>=20
> if( $arrayable instanceof \Arrayable ) {
>     $arrayable =3D $arrayable->toArray();
> }
>=20
> --
> PHP Internals - PHP Runtime Development Mailing List To unsubscribe, =
visit:
> http://www.php.net/unsub.php
>=20