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Date: Wed, 16 Oct 2019 17:01:02 +0100
Message-ID: <CALKiJKp4zne=nrrC=txj2iFhYJ26m25cneG3Nj1g-SktcsOMTQ@mail.gmail.com>
To: PHP Internals List <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="000000000000d408f70595093515"
Subject: Re: [PHP-DEV] Inline switch as alternative to nested inline conditional
From: rowan.collins@gmail.com (Rowan Tommins)

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On Wed, 16 Oct 2019 at 14:58, Robert Hickman <robehickman@gmail.com> wrote:

> > > <?php
> > > $say = switch (date("w")) {
> > >     case 0 => "weekend!";
> > >     case 1, 2, 3, 4, 5 => "weekday :(";
> > >     case 6 => "weekend!";
> > > };
> > > echo "Today is {$say}";
>
> If you had a really long expression, it may be easier to read if the
> assignment was moved to the end, perhaps like this:
>
> switch (date("w")) {
>     case 0 => "weekend!";
>     case 1, 2, 3, 4, 5 => "weekday :(";
>     case 6 => "weekend!";
>     // lots more cases ...
> } => $say;
>
> echo "Today is {$say}";
>


The assignment is not part of the switch syntax, the proposal is for a
switch expression which evaluates to a value, and can be used anywhere a
value is wanted. Your example is no different from a complex function call:

$say = doSomething(
    $foo,
    'weekend',
    [ 'blah => 42, 'bob' => 'smith' ],
    moreStuff()
);

It might be nice if there was a left-to-right assignment operator (there
are some languages which write it that way around), but that should be a
separate feature, where you could also write this:

doSomething(
    $foo,
    'weekend',
    [ 'blah => 42, 'bob' => 'smith' ],
    moreStuff()
) => $say;

Regards,
-- 
Rowan Tommins
[IMSoP]

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