[webkit-dev] Interface design question

[Ryosuke Niwa]

webkit-dev doesn't seem like an appropriate place to discuss this topic
unless you have a specific WebKit patch or bug that relates this design
question.

On Thu, Oct 11, 2012 at 1:19 PM, Siva B <bvs.siva at yahoo.com> wrote:

> Hello,
>
>       Have a design related question and hope to hear some insights.
>
>       Interfaces using abstract classes impose restriction(s) on it's
> derived implementations.
>         - The most widely used restriction is to IMPLEMENT Function(s)
>
>       Question:
>         Is it permissible to have similar kind of  restriction for any
> data members in the interface?
>         In a way that if some one wants to implement the interface it also
> must initialize certain variable.
>
>      Ex:
>
>         Say for a TCP/IP it absolutely necessary to have peer's IP address
> and Port number.
>         So, is wise to impose a restriction to pass above variable to
> initialize the class.
>
>         class IP4Connection
>         {
>                public:
>                     explicit IP4Connection( string ip, uint port);
>                     virtual int send() = 0;
>                     virtual int listen() = 0;
>                     virtual int reconnect() = 0;
>                protected:
>                     std::string ip;
>                     uint port;
>         };
>
> Thanks,
> Siva.
>
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>
>
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