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From: Michael_Hoennig@hh.maus.de (Michael Hoennig)
Newsgroups: comp.lang.c
Subject: MEMBER ACCESS ReadOnly
Message-ID: <4197@hh.maus.de>
Date: 4 Jun 91 19:39:00 GMT
Article-I.D.: hh.4197
Distribution: world,comp
Organization: Maus Mailbox Netz - UUCP-Gateway Bremen
Lines: 43


Hi Phil,

PC> A language feature I'd like to see...
PC>
PC> A class has certain data members, for efficiency reasons, I would like
PC>to grant the USER read-only access.
PC>
PC> class COORD
PC>   {
PC> public:
PC>   // Don't modify just read..
PC>   int x,y;
PC>   ...
PC>   };

Try this:

class COORD
{
    int x, y;

public:
    COORD() { x=0; y=0; }
    //...
    const int &theX() const { return(x); }
    const int &theY() const { return(y); }
};

int main()
{
    COORD aCoord;
    int   x;
    x = aCoord.theX();
    aCoord.theY() = x;
    return 0;
}

Bye

--
Michael Hoennig -- Dobbelersweg 45 -- D-2000 Hamburg 26 -- ++49 40 219 24 58
office: mi1@starlab.UUCP -- ++49 40 23 08 56 (StarDivision Hamburg)