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From: jk@cs.man.ac.uk (John Kewley ICL)
Newsgroups: comp.lang.c++
Subject: Re: Private Enumerations?
Message-ID: <1683@m1.cs.man.ac.uk>
Date: 7 Sep 90 15:02:54 GMT
References: <15414@reed.UUCP>
Sender: news@cs.man.ac.uk
Reply-To: jk@cs.man.ac.uk (John Kewley ICL)
Organization: Department of Computer Science, University of Manchester UK
Lines: 56

The following is not particularly useful, does not involve private enumerations,
yet could be of some interest:

// Boolean.hxx

#ifndef BOOLEAN_H
#define BOOLEAN_H

class Boolean
{
public:
    Boolean();
    Boolean(int n);

private:
    int value;
};

extern const Boolean true;
extern const Boolean false;
#endif /* BOOLEAN_H */
---------------------------------------------
// Boolean.cxx
#include "Boolean.hxx"

#define FALSE 0
#define TRUE 1

const Boolean true= FALSE;
const Boolean false= TRUE;

Boolean::Boolean()
{
        value= FALSE;
}
Boolean::Boolean(int n)
{
        value= (!n)?FALSE:TRUE;
}
---------------------------------------------
// use.cxx
#include "Boolean.hxx"

main()
{
    Boolean bool;
    int foo;
    bool = true;
    foo = true;
};

--
        J.K.
 
John M. Kewley, ICL, Wenlock Way, West Gorton, Manchester. M12 5DR
Tel:   (+44) 61 223 1301 X2138  Email: jk@r6.cs.man.ac.uk / jk@nw.stl.stc.co.uk