1// RUN: %clang_cc1 -std=c++11 -verify %s
2
3// expected-no-diagnostics
4using size_t = decltype(sizeof(0));
5
6template<typename T, typename U>
7constexpr T max(T t, U u) { return t > u ? t : u; }
8
9template<typename T, typename ...Ts>
10constexpr auto max(T t, Ts ...ts) -> decltype(max(t, max(ts...))) {
11  return max(t, max(ts...));
12}
13
14template<typename...T> struct my_union {
15  alignas(T...) char buffer[max(sizeof(T)...)];
16};
17
18struct alignas(8) A { char c; };
19struct alignas(4) B { short s; };
20struct C { char a[16]; };
21
22static_assert(sizeof(my_union<A, B, C>) == 16, "");
23static_assert(alignof(my_union<A, B, C>) == 8, "");
24