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From: jenings@hpfcbig.SDE.HP.COM (Byron Jenings)
Newsgroups: comp.lang.c++
Subject: Re: const vs. static in class declaration
Message-ID: <7180016@hpfcbig.SDE.HP.COM>
Date: 29 Mar 91 02:59:20 GMT
References: <286@dayton.stanford.edu>
Organization: HP SESD, Fort Collins, CO
Lines: 44


 Larry Augustin <lma@dayton.Stanford.EDU> writes:
|I have a number of integer constants that are part of a class.  What
|is the correct way to go about doing this?  I have been using:

|   class foo {
|    private:
|	...
|    protected:
|	...
|    public:
|      const int ID      = 258;
|      const int NUMBER  = 259;
|      const int IPORT   = 260;
|	...
|    };

|But I've been told that this only works in g++, and isn't standard.  I
|would like to avoid doing anything in my my application that isn't
|portable.

I believe that this is the proper way to do this:


In the header file:

   class foo {
    private:
       ...
    protected:
       ...
    public:
      static const int ID;	// note that 'static' doesn't refer to linking
      static const int NUMBER;
      static const int IPORT;
       ...
    };

Then, in the corresponding C++ source file that implements the members
of class foo:

const int foo::ID      = 258;
const int foo::NUMBER  = 259;
const int foo::IPORT   = 260;