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 #include "test_macros.h"
18
19 // std::array is explicitly allowed to be initialized with A a = { init-list };.
20 // Disable the missing braces warning for this reason.
21 #include "disable_missing_braces_warning.h"
22
23
24 #if TEST_STD_VER > 11
25 struct S {
26 std::array<int, 3> a;
27 int k;
SS28 constexpr S() : a{1,2,3}, k(std::get<2>(a)) {}
29 };
30
getArr()31 constexpr std::array<int, 2> getArr () { return { 3, 4 }; }
32 #endif
33
main()34 int main()
35 {
36 {
37 typedef double T;
38 typedef std::array<T, 3> C;
39 C c = {1, 2, 3.5};
40 std::get<1>(c) = 5.5;
41 assert(c[0] == 1);
42 assert(c[1] == 5.5);
43 assert(c[2] == 3.5);
44 }
45 #if TEST_STD_VER > 11
46 {
47 typedef double T;
48 typedef std::array<T, 3> C;
49 constexpr C c = {1, 2, 3.5};
50 static_assert(std::get<0>(c) == 1, "");
51 static_assert(std::get<1>(c) == 2, "");
52 static_assert(std::get<2>(c) == 3.5, "");
53 }
54 {
55 static_assert(S().k == 3, "");
56 static_assert(std::get<1>(getArr()) == 4, "");
57 }
58 #endif
59 }
60