[Bug c++/46643] warn_unused_result is not enforced if return type is templated

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46643

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2010-11-24 
18:27:58 UTC ---
It has nothing to do with templates but rather non-PODs:

class foo {
public:
    int baz() __attribute__((warn_unused_result));
private:
int a;
};

foo g(void) __attribute__((warn_unused_result));

int main(void) {
    foo b;
    g();
    return 0;
}