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Date: Tue, 9 Sep 2014 03:16:47 +0300
Message-ID: <CAPhkiZxjRr4vFO_f-2pjMcwUSnQaNwYKRh5CKuTOOzJZox_f6w@mail.gmail.com>
To: Andrea Faulds <ajf@ajf.me>
Cc: Adam Harvey <aharvey@php.net>, Christoph Becker <cmbecker69@gmx.de>, 
	PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] [RFC] Implicit isset() in Shorthand Ternary Operator
From: narf@devilix.net (Andrey Andreev)

On Tue, Sep 9, 2014 at 3:07 AM, Andrea Faulds <ajf@ajf.me> wrote:
>
> On 8 Sep 2014, at 23:58, Adam Harvey <aharvey@php.net> wrote:
>
>> +1 on ?? =E2=80=94 there's precedent for it, and it means we don't have =
to
>> explain why the shorthand form of an operator behaves differently to
>> the long form, which is just going to confuse users.
>
> FWIW, it already behaves differently:
>
>     oa-res-27-90:~ ajf$ php -r 'function foo() { echo "foo\n"; return tru=
e; } $x =3D foo() ?: false;'
>     foo
>     oa-res-27-90:~ ajf$ php -r 'function foo() { echo "foo\n"; return tru=
e; } $x =3D foo() ? foo() : false;'
>     foo
>     foo

That's arguable ... I'd say that ($x =3D foo()) ? $x : false; is the
logical equivalent of your first example.

Cheers,
Andrey.