Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:78807
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain ajf.me designates 192.64.116.208 as permitted sender)
Content-Type: text/plain; charset=utf-8
Mime-Version: 1.0 (Mac OS X Mail 8.0 \(1990.1\))
In-Reply-To: <CAHpw9AeNHLKFPmAF8AmZUeauz4_x+p7ayyN-pi2PBnZ6wV=CYg@mail.gmail.com>
Date: Thu, 6 Nov 2014 11:36:39 +0000
Cc: Stas Malyshev <smalyshev@sugarcrm.com>,
 PHP internals <internals@lists.php.net>
Content-Transfer-Encoding: quoted-printable
Message-ID: <6FB6D82E-CF77-462D-8420-A1E37915EA13@ajf.me>
References: <CAHpw9Ac0oapNSV=y4Gj3WCdZ1ckik+WOJt-yMdMjGt3u7iJpJg@mail.gmail.com> <545B3900.6070208@sugarcrm.com> <CAHpw9AeNHLKFPmAF8AmZUeauz4_x+p7ayyN-pi2PBnZ6wV=CYg@mail.gmail.com>
To: Daniel Ribeiro <drgomesp@gmail.com>
Subject: Re: [PHP-DEV] Allow arbitrary expressions when using instanceof operator
From: ajf@ajf.me (Andrea Faulds)


> On 6 Nov 2014, at 09:29, Daniel Ribeiro <drgomesp@gmail.com> wrote:
>=20
> On Thu, Nov 6, 2014 at 1:01 PM, Stas Malyshev <smalyshev@sugarcrm.com>
> wrote:
>=20
>> You could of course require the expression to always be enclosed in =
(),
>> but that produces weird syntax where some forms of instanceof work
>> without () and some only with (). Given that you can easily assign =
your
>> value to a variable, is it worth it?
>>=20
>> Also, you can always use is_a($foo, $bar->getClassName()).
>>=20
>=20
> This is exactly what I'm doing right now, requiring the expression to
> always be enclosed in parenthesis. I think it's way better to be able =
to do
> this instead of creating temporary variables just to assign a class =
name.
> Also, is_a, since it's a function, is significantly slower than =
instanceof,
> which is a construct (but of course you already now that).

This is still pretty weird, $foo instanceof Bar and $foo instanceof =
(Bar) shouldn=E2=80=99t be different.

Perhaps, dare I say it, we should merge the constant and class =
namespaces in PHP7? Those are perhaps the least likely to conflict. =
It=E2=80=99d mean we could handle instanceof expressions, and we =
wouldn=E2=80=99t need to use ::class.

--
Andrea Faulds
http://ajf.me/