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 <class T, size_t N >
12 // struct array
13
14 // Test the size and alignment matches that of an array of a given type.
15
16 #include <array>
17 #include <iterator>
18 #include <type_traits>
19 #include <cstddef>
20
21 #include "test_macros.h"
22
23
24 template <class T, size_t Size>
25 struct MyArray {
26 T elems[Size];
27 };
28
29 template <class T, size_t Size>
test()30 void test() {
31 typedef T CArrayT[Size == 0 ? 1 : Size];
32 typedef std::array<T, Size> ArrayT;
33 typedef MyArray<T, Size == 0 ? 1 : Size> MyArrayT;
34 static_assert(sizeof(ArrayT) == sizeof(CArrayT), "");
35 static_assert(sizeof(ArrayT) == sizeof(MyArrayT), "");
36 static_assert(TEST_ALIGNOF(ArrayT) == TEST_ALIGNOF(MyArrayT), "");
37 }
38
39 template <class T>
test_type()40 void test_type() {
41 test<T, 1>();
42 test<T, 42>();
43 test<T, 0>();
44 }
45
46 #if TEST_STD_VER >= 11
47 struct alignas(alignof(std::max_align_t) * 2) TestType1 {
48
49 };
50
51 struct alignas(alignof(std::max_align_t) * 2) TestType2 {
52 char data[1000];
53 };
54
55 struct alignas(alignof(std::max_align_t)) TestType3 {
56 char data[1000];
57 };
58 #endif
59
main(int,char **)60 int main(int, char**) {
61 test_type<char>();
62 test_type<int>();
63 test_type<double>();
64 test_type<long double>();
65
66 #if TEST_STD_VER >= 11
67 test_type<std::max_align_t>();
68 test_type<TestType1>();
69 test_type<TestType2>();
70 test_type<TestType3>();
71 #endif
72
73 return 0;
74 }
75