1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is dual licensed under the MIT and the University of Illinois Open
6// Source Licenses. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <array>
11
12// template <size_t I, class T, size_t N> T& get(array<T, N>& a);
13
14#include <array>
15#include <cassert>
16
17#if __cplusplus > 201103L
18struct S {
19   std::array<int, 3> a;
20   int k;
21   constexpr S() : a{1,2,3}, k(std::get<2>(a)) {}
22   };
23
24constexpr std::array<int, 2> getArr () { return { 3, 4 }; }
25#endif
26
27int main()
28{
29    {
30        typedef double T;
31        typedef std::array<T, 3> C;
32        C c = {1, 2, 3.5};
33        std::get<1>(c) = 5.5;
34        assert(c[0] == 1);
35        assert(c[1] == 5.5);
36        assert(c[2] == 3.5);
37    }
38#if _LIBCPP_STD_VER > 11
39    {
40        typedef double T;
41        typedef std::array<T, 3> C;
42        constexpr C c = {1, 2, 3.5};
43        static_assert(std::get<0>(c) == 1, "");
44        static_assert(std::get<1>(c) == 2, "");
45        static_assert(std::get<2>(c) == 3.5, "");
46    }
47    {
48        static_assert(S().k == 3, "");
49        static_assert(std::get<1>(getArr()) == 4, "");
50    }
51#endif
52}
53