[webkit-dev] Interface design question

2012-10-11 Thread Siva B
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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Re: [webkit-dev] Interface design question

2012-10-11 Thread 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.s...@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.

 ___
 webkit-dev mailing list
 webkit-dev@lists.webkit.org
 http://lists.webkit.org/mailman/listinfo/webkit-dev


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Re: [webkit-dev] Interface design question

2012-10-11 Thread Siva B
I'am Sorry.

Siva.





 From: Ryosuke Niwa rn...@webkit.org
To: Siva B bvs.s...@yahoo.com 
Cc: webkit-dev@lists.webkit.org webkit-dev@lists.webkit.org 
Sent: Thursday, October 11, 2012 2:43 PM
Subject: Re: [webkit-dev] Interface design question
 

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.s...@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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webkit-dev@lists.webkit.org
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___
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