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
18 struct S {
19    std::array<int, 3> a;
20    int k;
21    constexpr S() : a{1,2,3}, k(std::get<2>(a)) {}
22    };
23 
24 constexpr std::array<int, 2> getArr () { return { 3, 4 }; }
25 #endif
26 
27 int 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