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// A string is a contiguous container
12
13#include <string>
14#include <cassert>
15
16#include "test_macros.h"
17#include "test_allocator.h"
18#include "min_allocator.h"
19
20template <class C>
21TEST_CONSTEXPR_CXX20 void test_contiguous(const C& c) {
22 for (std::size_t i = 0; i < c.size(); ++i)
23 assert(*(c.begin() + static_cast<typename C::difference_type>(i)) == *(std::addressof(*c.begin()) + i));
24}
25
26template <class Alloc>
27TEST_CONSTEXPR_CXX20 void test_string(const Alloc& a) {
28 typedef std::basic_string<char, std::char_traits<char>, Alloc> S;
29
30 {
31 test_contiguous(S());
32 test_contiguous(S("1"));
33 test_contiguous(S("1234567890123456789012345678901234567890123456789012345678901234567890"));
34 }
35 {
36 test_contiguous(S(Alloc()));
37 test_contiguous(S("1", Alloc()));
38 test_contiguous(S("1234567890123456789012345678901234567890123456789012345678901234567890", Alloc()));
39 }
40 {
41 test_contiguous(S(Alloc(a)));
42 test_contiguous(S("1", Alloc(a)));
43 test_contiguous(S("1234567890123456789012345678901234567890123456789012345678901234567890", Alloc(a)));
44 }
45}
46
47TEST_CONSTEXPR_CXX20 bool test() {
48 test_string(std::allocator<char>());
49 test_string(test_allocator<char>());
50 test_string(test_allocator<char>(3));
51#if TEST_STD_VER >= 11
52 test_string(min_allocator<char>());
53#endif
54
55 return true;
56}
57
58int main(int, char**) {
59 test();
60#if TEST_STD_VER > 17
61 static_assert(test());
62#endif
63
64 return 0;
65}
66

source code of libcxx/test/std/strings/basic.string/string.require/contiguous.pass.cpp