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Date: Wed, 24 Sep 2014 22:33:17 +0100
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References: <CAEp07h9-mX3SdJPG0CRsjbr0ZKmPXsx=UjdEpUAT_kbM5VZXiQ@mail.gmail.com> <CAA8DMBv0GOwPjru=rzMijmZ+=4gvc6z1oHN6TNH0ohFSxBLWxA@mail.gmail.com> <54233506.8080102@gmail.com>
To: Rowan Collins <rowan.collins@gmail.com>
Subject: Re: [PHP-DEV] Little switch improvement: get the used variable
From: ajf@ajf.me (Andrea Faulds)


On 24 Sep 2014, at 22:17, Rowan Collins <rowan.collins@gmail.com> wrote:

> Perhaps rather than a magic function or constant, though, the switch =
statement could be extended with an "as" argument, which would store the =
evaluated expression into a normal variable, allowing nesting, and =
easier optimisation of the engine where the feature isn't used. Thus you =
could write this:
>=20
> switch( some_expression() as $switch_value ){
>  case 1:
>    do_something();
>  break;
>  //...
>  default:
>    throw new Exception('Undefined input: ' . $switch_value);
>    break;
> }

Incredibly, some brave soul has gone back in time and already =
implemented this, when none of us was looking!

    switch($switch_value =3D some_expression()) {
        ...
    }
--
Andrea Faulds
http://ajf.me/