http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51222
--- Comment #2 from Daniel Krügler <daniel.kruegler at googlemail dot com>
2011-11-21 07:51:49 UTC ---
When fixing this problem, I suggest to add the following tests as well, which
also fail currently (In previous builds sometimes one of these forms worked
when the other failed):
//---
template<class T>
struct add_rref {
typedef T&& type;
};
template<>
struct add_rref<void> {
typedef void type;
};
template<class T>
typename add_rref<T>::type declval();
template<class T, class U>
auto f2(int) -> decltype(::delete ::new T(declval<U>()), char());
template<class, class>
auto f2(...) -> char(&)[2];
template<class T>
auto g2(int) -> decltype(::delete ::new T(), char());
template<class>
auto g2(...) -> char(&)[2];
struct C { };
struct A {
virtual ~A() = 0;
};
struct D1 {
D1() = delete;
};
struct D2 {
~D2() = delete;
};
static_assert(sizeof(g2<void>(0)) == 2, "Ouch");
static_assert(sizeof(g2<void()>(0)) == 2, "Ouch");
static_assert(sizeof(g2<void() const>(0)) == 2, "Ouch");
static_assert(sizeof(g2<A>(0)) == 2, "Ouch");
static_assert(sizeof(g2<D1>(0)) == 2, "Ouch");
static_assert(sizeof(g2<D2>(0)) == 2, "Ouch");
static_assert(sizeof(g2<int&>(0)) == 2, "Ouch");
static_assert(sizeof(g2<int&&>(0)) == 2, "Ouch");
static_assert(sizeof(g2<void(&)()>(0)) == 2, "Ouch");
static_assert(sizeof(g2<void(&&)()>(0)) == 2, "Ouch");
static_assert(sizeof(f2<void, void>(0)) == 2, "Ouch");
static_assert(sizeof(f2<void(), void()>(0)) == 2, "Ouch");
static_assert(sizeof(f2<void() const, void() const>(0)) == 2, "Ouch");
static_assert(sizeof(f2<int, void>(0)) == 2, "Ouch");
static_assert(sizeof(f2<void, int>(0)) == 2, "Ouch");
static_assert(sizeof(f2<C, void>(0)) == 2, "Ouch");
static_assert(sizeof(f2<C, int>(0)) == 2, "Ouch");
static_assert(sizeof(f2<int&, int&>(0)) == 2, "Ouch");
static_assert(sizeof(f2<int&&, int&&>(0)) == 2, "Ouch");
static_assert(sizeof(f2<void(&)(), void(&)()>(0)) == 2, "Ouch");
static_assert(sizeof(f2<void(&&)(), void(&&)()>(0)) == 2, "Ouch");
//---
