Path: utzoo!utgpu!utstat!jarvis.csri.toronto.edu!mailrus!ames!ncar!boulder!sunybcs!rutgers!att!whuts!homxb!dean
From: dean@homxb.ATT.COM (D.JONES)
Newsgroups: comp.lang.c++
Subject: Re: CFRONT braindamaged? (Or me?)
Summary: this,  what's this this ???
Message-ID: <2944@homxb.ATT.COM>
Date: 8 Feb 89 00:08:00 GMT
References: <2205@galaxy>
Organization: AT&T BL Holmdel NJ USA
Lines: 48

In article <2205@galaxy>, dave@andromeda.rutgers.edu (Dave Bloom) writes:
> Hi there. We're running AT&T's C++ Ver 1.2.1, and as far as I'm
> concerned, the following should work hunky-dorey. Does anybody
> see anything wrong with my syntax?
> 
> 	class zz {
> 	    public:
> 		void (*xx)(char*);
> 		void b(char* s) { printf("function b: %s\n", s); }
> 		zz(int i) {
> 			if(i==0)	xx= &(zz::a);
> 		    	else if(i==1)	xx= &(zz::b);
> 		    	else		xx= &(zz::c);
> 			}
> 	};
> 	main()
> 	{
> 		zz dave(1);
> 		dave.xx("Yes!!!");
> 	}
> rutgers\                                                 | Dave Bloom
>  galaxy >!andromeda!dave -or- dave@andromeda.rutgers.edu | Work: (201)648-5085
> pyramid/                                                 |

Dave,
	The problem seems to be that the compiler does not recognize xx as
a `member function',  where a,b, & c are member functions.  Since they are
member functions they expect a pointer to the object or a ``this'' pointer
as the first argument. If you call them indirectly through xx the ``this''
pointer is not added to the stack of xx, it pulls off "Yes!!!" as ``this''
and as for where the second argument, or s points,  all bets are off .....

							Dean S Jones
							UNICAD/IDS
							AT&T Bell Labs
							Holmdel, NJ

							dean@homxb.ATT.COM

Line.Eater()
Line.Eater()
Line.Eater()
Line.Eater()
Line.Eater()
Line.Eater()
Line.Eater()
Line.Eater()
Line.Eater()