[aspectc-user] keyword volatile and bid structures

[J. Liebig]

Hi everyone,

I'm using AspectC++ for static introductions (via slice classes)
to existing structures, that contain bitstructures. The weaving
works fine, but when I try to compile, it fails with:

avr-gcc -o main -mmcu=at90can128 -O2 main.cc     
Led.ah: In member function 'const void* LED0::__attr(unsigned int) const':
Led.ah:26: error: invalid conversion from 'const volatile void*' to
'const void*'
Led.ah:26: error: attempt to take address of bit-field structure member
'LED0::LEDPIN'
Led.ah:26: error: attempt to take address of bit-field structure member
'LED0::LEDDDR'
Led.ah:26: error: attempt to take address of bit-field structure member
'LED0::LEDPORT'

I'm using:
ac++ 1.0pre4 svn (Jul  9 2008) and
gcc version 4.0.2



The examle is as follows:
// Led.h
#include <inttypes.h>

class LED0 {
public:
        volatile uint8_t _pad[0x20];

        // PINA
        volatile uint8_t
                LEDPIN  : 1,
                                : 7;

        // DDRA
        volatile uint8_t
                LEDDDR  : 1,
                                : 7;

        // PORTA
        volatile uint8_t
                LEDPORT : 1,
                                : 7;
};


// Led.ah
#ifndef __LED_AH__
#define __LED_AH__

aspect Led {
        pointcut ledfunc() = "LED%";

        advice ledfunc() : slice class S {
        public:
                S() {
                        LEDPORT = 0;
                        LEDDDR  = 1;
                }

                void on() {
                        LEDPORT = 1;
                }

                void off() {
                        LEDPORT = 0;
                }
        };
};

#endif // __LED_AH__



// main.cc
#include "Led.h"

int main(int argc, char** argv) {
        LED0& l0 = *((LED0*) 0x00);
        l0.on();

        while(1)
                ;
}


kind regards
Joerg Liebig