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From: gyro@kestrel.edu (Scott Layson)
Newsgroups: comp.lang.c++
Subject: Re: possible to overload << and pass an object ptr?
Message-ID: <1991Mar25.192002.6392@kestrel.edu>
Date: 25 Mar 91 19:20:02 GMT
References: <todd.669759003@premises1.Quotron.COM> <1991Mar24.074308.28666@kestrel.edu> <ARI.HUTTUNEN.91Mar24212428@punisher.hut.fi>
Reply-To: Gyro@Reasoning.COM
Organization: Kestrel Institute, Palo Alto, CA
Lines: 27

In article <ARI.HUTTUNEN.91Mar24212428@punisher.hut.fi> Ari.Huttunen@hut.fi (Ari Juhani Huttunen) writes:
>In article <1991Mar24.074308.28666@kestrel.edu> gyro@kestrel.edu (Scott Layson) writes:
>
>>For these reasons I have toyed with the idea of proposing to the
>>committee a system for declaring "member functions" on the type `C*'
>>where C is some class, so that your first example could be made to
>>work without the two-level class structure.  Unfortunately, I have
>>never managed to come up with a proposal I find adequately elegant.
>
>How about this one?
>
>struct S {
>friend  void operator<<(S *s, char p1) { *s << p1; }
>	void operator<<(char p1) { cout << p1; }
>};

Ah.  Indeed that works for the specific example under consideration.
I was thinking of the example I had encountered in the past, where I
basically wanted to hide from the outside world the fact that a class
was implemented as a pointer.  So, I wanted to say `obj.mfunc()'
rather than `obj->mfunc()'.

Granted, overloadable `.' would accomplish this.  I seem to recall,
however, that that still isn't all I wanted.  Let me think about this.

-- Scott Layson Burson
Gyro@Reasoning.COM