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References: <461958fe-182e-59bf-9fdb-b110fd09e2b2@aimeos.com>
In-Reply-To: <461958fe-182e-59bf-9fdb-b110fd09e2b2@aimeos.com>
Date: Sun, 17 Nov 2019 11:10:22 -0500
Message-ID: <CAN=NbAJ_6K2WZ8YwVL6B5ubZmtS-BwrN_kx5-0=LFj_NU_5Grw@mail.gmail.com>
To: "Aimeos | Norbert Sendetzky" <norbert@aimeos.com>
Cc: internals@lists.php.net
Content-Type: multipart/alternative; boundary="000000000000117b6905978d1284"
Subject: Re: [PHP-DEV] Concept: "arrayable" pseudo type and \Arrayable interface
From: dohpaz@gmail.com (Ken Stanley)

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On Sun, Nov 17, 2019 at 9:42 AM Aimeos | Norbert Sendetzky <
norbert@aimeos.com> wrote:

> Since PHP 7.1 there's the "iterable" pseudo type hint that matches
> "array" and "Traversable".
>
> PHP frameworks would profit from support of an "arrayable" pseudo type
> hint that matches "array" and all objects that implements "Traversable",
> "ArrayAccess" and "Countable".
>
> Thus, we could pass arrays or all objects that behave like arrays to
> methods and do:
>
> function useArrayable( arrayable $arg ) : arrayable {
>     $cnt =3D count( $arg );
>     $value =3D $arg['key'];
>     foreach( $arg as $key =3D> $entry ) { ... }
>     return $arg;
> }
>
> It would be useful to implement an Arrayable interface too:
>
> interface Arrayable extends \Iterator, \Countable, \ArrayAccess
> {
>     public function toArray() : array;
> }
>
> Then, we can use array like objects:
>
> class Test implements \Arrayable
> {
>     // ...
> }
>
> $arrayable =3D new Test();
> $arrayable['key'] =3D $value;
> $arrayable =3D useArrayable( $arrayable );
>
> And if necessary, we can convert them to native arrays:
>
> if( $arrayable instanceof \Arrayable ) {
>     $arrayable =3D $arrayable->toArray();
> }
>
> --
> PHP Internals - PHP Runtime Development Mailing List
> To unsubscribe, visit: http://www.php.net/unsub.php


Also the toArray() should be called when an Arrayable is cast to an array:
(array)$arrayable.

And shouldn=E2=80=99t the toArray match the same naming semantics as __toSt=
ring?
--=20
"Do not go gentle into that good night. Rage, rage against the dying of the
light." =E2=80=94 Dylan Thomas

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