[Bug c++/17112] default operator= for struct with packed bitfield is wrong
bangerth at dealii dot org
gcc-bugzilla@gcc.gnu.org
Fri Aug 20 12:50:00 GMT 2004
------- Additional Comments From bangerth at dealii dot org 2004-08-20 12:50 -------
To see what really happens, here's a way to get a dump of the
contents of the entire field:
------------------
#include <iostream>
using namespace std;
struct myint24 {
int int24:24 __attribute__ ((packed));
};
myint24 x[3] = {
0x010203,
0x040506,
0x070809
};
myint24 y[3]; // starts out as zeros
int main(int ac, char* av[])
{
y[1] = x[1];
for ( int i=0; i<sizeof(y); ++i )
cout << (int)*((char*)y + i) << endl;
}
--------------------------
This, for me, prints
g/x> ./a.out
0
0
0
6
5
4
9
0
0
W.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17112
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