Re: PHP RFC: Deffering functions by arguments (count or/and type)
| From: | Johannes Schlüter | Date: | Fri, 22 Nov 2013 12:03:36 +0000 |
| Subject: | Re: PHP RFC: Deffering functions by arguments (count or/and type) | ||
| References: | 1 2 3 4 5 | Groups: | php.internals |
| Request: | Send a blank email to internals+get-70281@lists.php.net to get a copy of this message | ||
On Fri, 2013-11-22 at 11:54 +0200, Oleg Poludnenko wrote:
> Here there is a code sample:
> https://gist.github.com/uaoleg/7596995
That sample fails the Liskov substitution principle. Any instance of
figure has to have a calcPerimeter method taking zero arguments else you
can't use them interchangeably what the base class should guarantee.
http://en.wikipedia.org/wiki/Liskov_substitution_principle
johannes