Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:70017
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.214.179 as permitted sender)
MIME-Version: 1.0
In-Reply-To: <CAMhKfba+uk=cN3v_gSkc5rkf9MUc06Muv3mQ2bNURiNZ64fcqQ@mail.gmail.com>
References: <CAMhKfba+uk=cN3v_gSkc5rkf9MUc06Muv3mQ2bNURiNZ64fcqQ@mail.gmail.com>
Date: Tue, 5 Nov 2013 19:09:47 +0100
Message-ID: <CAF+90c_XTc-hX3DQK-4rWnGGJZ2hK=WLKxYN5-Kn7wn8LZ5o5g@mail.gmail.com>
To: Oleg Poludnenko <oleg@poludnenko.info>
Cc: PHP internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary=e89a8ff1ce02224edc04ea71f0c3
Subject: Re: [PHP-DEV] PHP RFC: Deffering functions by arguments (count or/and type)
From: nikita.ppv@gmail.com (Nikita Popov)

--e89a8ff1ce02224edc04ea71f0c3
Content-Type: text/plain; charset=ISO-8859-1

On Tue, Nov 5, 2013 at 2:03 PM, Oleg Poludnenko <oleg@poludnenko.info>wrote:

> Hi,
>
> My idea is somehow related to this one: Syntax for variadic
> functions<https://wiki.php.net/rfc/variadics>
> It is not a competitive idea but a supplemental one.
>
> So, the main point is to write different implementations for the functions
> with the same name, but with different of arguments count or/and type:
>
> class Config { /** * Returns property value * @param string $key *
> @returnmixed */
> public function prop($key) { return isset($this->prop[$key]) ? $this->prop[
> $key] : null; } /** * Sets property value * @param string $key *
> @parammixed $value *@returnConfig */
> public function prop($key, $value) { $this->prop[$key] = $value; return
> $this; } }
>
> Also it will be possible to change arguments during inheritance:
>
> class Figure { /** * Calculate perimeter of an arbitrary figure *
> @paramarray $angles *@returnint */
> public function calcPerimeter(array $angles) { return array_sum($angles); }
> } class Square extends Figure { /** * Calculate perimeter of a square
> *@paramint $angle *@returnint */
> public function calcPerimeter($angle) { return 4 * $angle; } } class
> Rectangle extends Figure { /** * Calculate perimeter of a rectangle *
> @paramint $height *@paramint $width *@returnint */
> public function calcPerimeter($height, $width) { return 2 * ($height +
> $width); } }
>
> The advantages of the syntax are:
>
>    - It's immediately clear what function implements.
>    - The function becomes cleaner, without a lot of if-else constructions.
>    - A great opportunity to change function arguments during inheritance.
>
>
> Regards,
> Oleg Poludnenko
>

Would you mind putting your code in a gist/pastebin (or re-sending the mail
with proper formatting)? It's hard to understand what this is about when
the code is all in one line :)

Nikita

--e89a8ff1ce02224edc04ea71f0c3--