1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <array>
10
11 // template <size_t I, class T, size_t N> T& get(array<T, N>& a);
12
13 #include <array>
14 #include <cassert>
15
16 #include "test_macros.h"
17
18 template <typename ...T>
tempArray(T...args)19 TEST_CONSTEXPR std::array<int, sizeof...(T)> tempArray(T ...args)
20 {
21 return {args...};
22 }
23
tests()24 TEST_CONSTEXPR_CXX14 bool tests()
25 {
26 {
27 std::array<double, 1> array = {3.3};
28 assert(std::get<0>(array) == 3.3);
29 std::get<0>(array) = 99.1;
30 assert(std::get<0>(array) == 99.1);
31 }
32 {
33 std::array<double, 2> array = {3.3, 4.4};
34 assert(std::get<0>(array) == 3.3);
35 assert(std::get<1>(array) == 4.4);
36 std::get<0>(array) = 99.1;
37 std::get<1>(array) = 99.2;
38 assert(std::get<0>(array) == 99.1);
39 assert(std::get<1>(array) == 99.2);
40 }
41 {
42 std::array<double, 3> array = {3.3, 4.4, 5.5};
43 assert(std::get<0>(array) == 3.3);
44 assert(std::get<1>(array) == 4.4);
45 assert(std::get<2>(array) == 5.5);
46 std::get<1>(array) = 99.2;
47 assert(std::get<0>(array) == 3.3);
48 assert(std::get<1>(array) == 99.2);
49 assert(std::get<2>(array) == 5.5);
50 }
51 {
52 std::array<double, 1> array = {3.3};
53 static_assert(std::is_same<double&, decltype(std::get<0>(array))>::value, "");
54 }
55 {
56 assert(std::get<0>(tempArray(1, 2, 3)) == 1);
57 assert(std::get<1>(tempArray(1, 2, 3)) == 2);
58 assert(std::get<2>(tempArray(1, 2, 3)) == 3);
59 }
60
61 return true;
62 }
63
main(int,char **)64 int main(int, char**)
65 {
66 tests();
67 #if TEST_STD_VER >= 14
68 static_assert(tests(), "");
69 #endif
70 return 0;
71 }
72