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