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 // An array is a contiguous container
12 
13 #include <array>
14 #include <cassert>
15 
16 #include "test_macros.h"
17 
18 template <class Container>
19 TEST_CONSTEXPR_CXX14 void assert_contiguous(Container const& c)
20 {
21     for (size_t i = 0; i < c.size(); ++i)
22         assert(*(c.begin() + i) == *(std::addressof(*c.begin()) + i));
23 }
24 
25 TEST_CONSTEXPR_CXX17 bool tests()
26 {
27     assert_contiguous(std::array<double, 0>());
28     assert_contiguous(std::array<double, 1>());
29     assert_contiguous(std::array<double, 2>());
30     assert_contiguous(std::array<double, 3>());
31 
32     assert_contiguous(std::array<char, 0>());
33     assert_contiguous(std::array<char, 1>());
34     assert_contiguous(std::array<char, 2>());
35     assert_contiguous(std::array<char, 3>());
36 
37     return true;
38 }
39 
40 int main(int, char**)
41 {
42     tests();
43 #if TEST_STD_VER >= 17 // begin() & friends are constexpr in >= C++17 only
44     static_assert(tests(), "");
45 #endif
46     return 0;
47 }
48