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 // std::array is explicitly allowed to be initialized with A a = { init-list };.
19 // Disable the missing braces warning for this reason.
20 #include "disable_missing_braces_warning.h"
21
22
23 template <typename ...T>
tempArray(T...args)24 TEST_CONSTEXPR std::array<int, sizeof...(T)> tempArray(T ...args)
25 {
26 return {args...};
27 }
28
tests()29 TEST_CONSTEXPR_CXX14 bool tests()
30 {
31 {
32 std::array<double, 1> array = {3.3};
33 assert(std::get<0>(array) == 3.3);
34 std::get<0>(array) = 99.1;
35 assert(std::get<0>(array) == 99.1);
36 }
37 {
38 std::array<double, 2> array = {3.3, 4.4};
39 assert(std::get<0>(array) == 3.3);
40 assert(std::get<1>(array) == 4.4);
41 std::get<0>(array) = 99.1;
42 std::get<1>(array) = 99.2;
43 assert(std::get<0>(array) == 99.1);
44 assert(std::get<1>(array) == 99.2);
45 }
46 {
47 std::array<double, 3> array = {3.3, 4.4, 5.5};
48 assert(std::get<0>(array) == 3.3);
49 assert(std::get<1>(array) == 4.4);
50 assert(std::get<2>(array) == 5.5);
51 std::get<1>(array) = 99.2;
52 assert(std::get<0>(array) == 3.3);
53 assert(std::get<1>(array) == 99.2);
54 assert(std::get<2>(array) == 5.5);
55 }
56 {
57 std::array<double, 1> array = {3.3};
58 static_assert(std::is_same<double&, decltype(std::get<0>(array))>::value, "");
59 }
60 {
61 assert(std::get<0>(tempArray(1, 2, 3)) == 1);
62 assert(std::get<1>(tempArray(1, 2, 3)) == 2);
63 assert(std::get<2>(tempArray(1, 2, 3)) == 3);
64 }
65
66 return true;
67 }
68
main(int,char **)69 int main(int, char**)
70 {
71 tests();
72 #if TEST_STD_VER >= 14
73 static_assert(tests(), "");
74 #endif
75 return 0;
76 }
77