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;
SS21 constexpr S() : a{1,2,3}, k(std::get<2>(a)) {}
22 };
23
getArr()24 constexpr std::array<int, 2> getArr () { return { 3, 4 }; }
25 #endif
26
main()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