g++4.3.0 is wrongly eliding the copy constructor and the assignment of a
struct. Look at the following code:
#include <iostream>
#include <complex>
struct Complex {
std::complex<double> value;
};
const Complex one = { 1 };
int main() {
Complex z = one, w;
w = one;
std::cout << "one = " << one.value << std::endl;
std::cout << "z = " << z.value << std::endl;
std::cout << "w = " << w.value << std::endl;
}
It prints:
one = (1,0)
z = (0,0)
w = (0,0)
When the value is of type double instead of complex<double> the problem doesn't
occur. Also, this doesn't happen using the compiler switch
-fno-elide-constructors .
--
Summary: Default copy constructor and assignment operator ignored
Product: gcc
Version: 4.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: mjdcc at cftp dot ist dot utl dot pt
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41381
