Path: utzoo!attcan!uunet!mcvax!cernvax!ethz!peter
From: peter@ethz.UUCP (Peter Beadle)
Newsgroups: comp.lang.c++
Subject: overloading array indexing
Keywords: [] bugs? array indexing
Message-ID: <451@ethz.UUCP>
Date: 13 May 88 16:22:05 GMT
Organization: ETH Zuerich
Lines: 41


I have been trying to overload the array indexing operation as part of
a simulator I am writing. I am getting nowhere fast. I have a
small program below and the C code it produces.

The translator produces a _tiny__vec function when I don't inline the
overload.  This function contains the correct code but it never gets
called in main.  Similarly when the overload is inlined nothing but a
reference to the name of the array is produced in main.  This is the
smallest example I can produce.

Anybody got any ideas.

Peter Beadle
peter@eiger.uucp
mcvax!cernvax!iis!peter

/* test program */
#include    <stream.h>
class tiny{
    int v;
public:
    tiny() {v=0;}
    void operator[](int i) { cerr << "in overloaded []\n"; }
};

main() {
    tiny    fred[5];

    fred[2];
}

/* the main program it produces */
int main (){ 
    _main(); 
    { 
        struct tiny _auto_fred [5];
        _vec_new ( (int *)_auto_fred , 5, 4, (int *)_tiny__ctor ) ;
        _auto_fred ;
    }
};