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Date: Tue, 17 Jan 2017 21:51:20 +0100
In-Reply-To: <CAF+90c8jVhaOu_GF9hAR-_VTkm9cQMV86RS09-P_cKtORFrQVg@mail.gmail.com>
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To: Nikita Popov <nikita.ppv@gmail.com>
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Subject: Re: [PHP-DEV] [RFC][DISCUSSION] - Disallow Multiple Constructor Calls
From: tim.bezhashvyly@gmail.com (Tim Bezhashvyly)

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Hi Nikita,

thank you for your feedback. Would you suggest to convert RFC into =
prohibition of explicit __construct calls except parent::__construct?

Regards,
Tim

> On 17 Jan 2017, at 21:48, Nikita Popov <nikita.ppv@gmail.com> wrote:
>=20
> On Tue, Jan 17, 2017 at 9:17 PM, Tim Bezhashvyly =
<tim.bezhashvyly@gmail.com <mailto:tim.bezhashvyly@gmail.com>> wrote:
> Dear internals,
>=20
> me and Richard Fussenegger came up with a RFC draft disallowing =
multiple constructor calls - =
https://wiki.php.net/rfc/disallow-multiple-constructor-calls =
<https://wiki.php.net/rfc/disallow-multiple-constructor-calls> =
<https://wiki.php.net/rfc/disallow-multiple-constructor-calls =
<https://wiki.php.net/rfc/disallow-multiple-constructor-calls>>
>=20
> Here is a Reddit discussion thread - =
https://www.reddit.com/r/PHP/comments/5okdac/php_rfc_disallow_multiple_con=
structor_calls/ =
<https://www.reddit.com/r/PHP/comments/5okdac/php_rfc_disallow_multiple_co=
nstructor_calls/> =
<https://www.reddit.com/r/PHP/comments/5okdac/php_rfc_disallow_multiple_co=
nstructor_calls/ =
<https://www.reddit.com/r/PHP/comments/5okdac/php_rfc_disallow_multiple_co=
nstructor_calls/>>
>=20
> Any suggestions are highly welcome. Thank you.
>=20
> Regards,
> Tim
>=20
> Without putting a lot of though into this, the restriction sounds =
reasonable.
>=20
> However, it is not immediately clear to me how this can be implemented =
without adding a disproportionate amount of overhead for something which =
I would consider a rather minor feature. If an object only had a single =
constructor this would be a simple flag, but if you want to allow one =
call per each constructor in the hierarchy (i.e. you can call the =
constructor and each parent constructor once), this information needs to =
be stored somehow. The obvious way would be a hashset containing the =
constructors (or CEs) that have been called on the object, but I don't =
think this would be acceptable.
>=20
> Regards,
> Nikita


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