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 // GCC 5 doesn't implement the required constexpr support
12 // UNSUPPORTED: gcc-5
13
14 // An array is a contiguous container
15
16 #include <array>
17 #include <cassert>
18
19 #include "test_macros.h"
20
21 template <class Container>
assert_contiguous(Container const & c)22 TEST_CONSTEXPR_CXX14 void assert_contiguous(Container const& c)
23 {
24 for (size_t i = 0; i < c.size(); ++i)
25 assert(*(c.begin() + i) == *(std::addressof(*c.begin()) + i));
26 }
27
tests()28 TEST_CONSTEXPR_CXX17 bool tests()
29 {
30 assert_contiguous(std::array<double, 0>());
31 assert_contiguous(std::array<double, 1>());
32 assert_contiguous(std::array<double, 2>());
33 assert_contiguous(std::array<double, 3>());
34
35 assert_contiguous(std::array<char, 0>());
36 assert_contiguous(std::array<char, 1>());
37 assert_contiguous(std::array<char, 2>());
38 assert_contiguous(std::array<char, 3>());
39
40 return true;
41 }
42
main(int,char **)43 int main(int, char**)
44 {
45 tests();
46 #if TEST_STD_VER >= 17 // begin() & friends are constexpr in >= C++17 only
47 static_assert(tests(), "");
48 #endif
49 return 0;
50 }
51