23 lines
620 B
C++
23 lines
620 B
C++
// RUN: %clang_cc1 -std=c++11 -verify %s
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// expected-no-diagnostics
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using size_t = decltype(sizeof(0));
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template<typename T, typename U>
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constexpr T max(T t, U u) { return t > u ? t : u; }
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template<typename T, typename ...Ts>
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constexpr auto max(T t, Ts ...ts) -> decltype(max(t, max(ts...))) {
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return max(t, max(ts...));
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}
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template<typename...T> struct my_union {
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alignas(T...) char buffer[max(sizeof(T)...)];
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};
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struct alignas(8) A { char c; };
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struct alignas(4) B { short s; };
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struct C { char a[16]; };
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static_assert(sizeof(my_union<A, B, C>) == 16, "");
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static_assert(alignof(my_union<A, B, C>) == 8, "");
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