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Date: Tue, 10 Feb 2015 16:06:43 +0900
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Message-ID: <CAGa2bXZgFwX48=xmw3embGig7gXdke7PuziyhFhHDSxj56A67A@mail.gmail.com>
To: Joe Watkins <pthreads@pthreads.org>
Cc: Dmitry Stogov <dmitry@zend.com>, PHP Internals <internals@lists.php.net>, 
	Stanislav Malyshev <smalyshev@gmail.com>
Content-Type: multipart/alternative; boundary=001a11c13054f5c63f050eb68991
Subject: Re: [PHP-DEV] Design by Contract
From: yohgaki@ohgaki.net (Yasuo Ohgaki)

--001a11c13054f5c63f050eb68991
Content-Type: text/plain; charset=UTF-8

Hi Joe,

On Tue, Feb 10, 2015 at 3:59 PM, Joe Watkins <pthreads@pthreads.org> wrote:

> I'm not sure we can always enforce invariant contracts ...
>
> Evaluating invariant expressions on entry and exit is not enough, since a
> property can be changed without the use of a method.
>
> Can or should, we do anything about that ?
>
> This should also be covered in the RFC, I think.
>

One reason I would like to use __invariant() is to allow overriding parents.
I think we should have way for it, but I don't have good idea now.
I'm still thinking.

Regards,

--
Yasuo Ohgaki
yohgaki@ohgaki.net

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