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Date: Fri, 16 Sep 2005 08:49:22 +0200
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Subject: Re: [PHP-DEV] PHP 6.0 Wishlist
From: r.korving@xit.nl ("Ron Korving")

The problem with this would be that it can't be decided on a per-case basis,
but only for the whole switch, which would make the execution slower. That's
why I'd prefer a "regcase", but I guess this can be considered ugly becuase
e.g. C(++) doesn't have a "regcase" either and it's quite a diversion from
the known syntax.

Ron

"Hartmut Holzgraefe" <hartmut@php.net> schreef in bericht
news:4329DEBE.3080204@php.net...
> Ron Korving wrote:
> > I have another idea I came up with today: regular expression switches,
but
> > it would be difficult without adding to the syntax.
>
> no, its actually pretty easy from a syntax point of view,
> you don't need to add another keyword, just add an optional
> callback parameter to switch() which is a comparison function
> similar to what you pass to e.g. usort()
>
> that way you are not limited to one type of reges but could
> have ereg or preg style or could do other things like case
> insensitive switches:
>
> switch ($str, "ereg") {
>    case "[[:alpha:]]+":...
> }
>
> switch ($str, "preg_match") {
>    case "/^[A-Za-z]+$/": ...
> }
>
> switch ($str, "strcasecmp") {
>    ...
> }
>
> or even
>
> function my_cmp($str1, $str2) {
>    return strcmp(str_rev($str1, $str2));
> }
>
> switch ($str, "my_cmp") ...
>
>
> i have looked into implementing that quite a while ago
> but hat to give up due to lack of time and understanding
> at that point in time though