Andy Dougherty wrote:
On Wed, 30 Oct 2002, Leopold Toetsch wrote:
[sundry 'const' warnings]
Nicholas Clark suggested that we could perhaps use a union, something like
Nice idea - works for me (gcc 2.95.2)
Slightly modified - please try this (cc -Wall -Wcast-qual ..)
static union {
const void * __c_ptr;
void * __ptr;
} __ptr_u;
#define const_cast(b) (__ptr_u.__c_ptr = (b), __ptr_u.__ptr)
char *f(const void *b)
{
char *s = (char*) const_cast(b);
return s;
}
int main() {
char *s = f("abc");
return *s != 'a';
}
leo
