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In-Reply-To: <35fd7cd8-ee18-7cc3-68ea-543429c1f6dc@telia.com>
Date: Tue, 22 Jan 2019 17:39:44 +0100
Message-ID: <CAF+90c_RyVM2wpZ+zLco7ShHwEbfzEh18cV4wvEV_1UtkuHx6Q@mail.gmail.com>
To: =?UTF-8?Q?Bj=C3=B6rn_Larsson?= <bjorn.x.larsson@telia.com>
Cc: Sara Golemon <pollita@php.net>, PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Coalesce assign operator (??=) implemented
From: nikita.ppv@gmail.com (Nikita Popov)

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On Tue, Jan 22, 2019 at 4:51 PM Bj=C3=B6rn Larsson <bjorn.x.larsson@telia.c=
om>
wrote:

> Hi,
>
> Excellent work! I have been waiting for this :)
>
> Sara, I came to think on the Short ternary Assignment Operator RFC.
> Would this implementation make that one more feasible, given it
> passes a vote?
>

From an implementation perspective ?:=3D is nearly identical to ??=3D, so
implementing it should be quite simple now. Whether an RFC for it would
pass is a different question, I'm not a big fan personally...

Nikita


> r//Bj=C3=B6rn Larsson
>
> Den 2019-01-22 kl. 11:33, skrev Nikita Popov:
>
> > Hi internals,
> >
> > Some time ago an RFC for the ??=3D operator has been accepted:
> > https://wiki.php.net/rfc/null_coalesce_equal_operator
> >
> > However, due to implementation difficulties, the RFC hasn't landed sinc=
e
> > then. I'm happy to say that these difficulties are resolved now, and ??=
=3D
> > has landed with
> >
> https://github.com/php/php-src/commit/a50198d0fef652ca052cda642d6e98a9101=
eb73f
> > .
> >
> > To summarize the important ??=3D semantics: $a ??=3D $b is roughly equi=
valent
> > to $a ?? ($a =3D $b). In $a[foo()] ??=3D bar() the function foo() will =
be
> > evaluated exactly once, and bar() will be evaluated iff $a[foo()] is nu=
ll
> > (or unset).
> >
> > Regards,
> > Nikita
> >
>

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