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// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11// <string_view>
12
13// class iterator
14
15#include <cassert>
16#include <concepts>
17#include <iterator>
18#include <string_view>
19
20#include "test_macros.h"
21#include "make_string.h"
22
23template <class CharT>
24TEST_CONSTEXPR_CXX14 void test_type() {
25 using C = std::basic_string_view<CharT>;
26 typename C::iterator ii1 = typename C::iterator(), ii2 = typename C::iterator();
27 typename C::iterator ii4 = ii1;
28 typename C::const_iterator cii = typename C::const_iterator();
29 assert(ii1 == ii2);
30 assert(ii1 == ii4);
31 assert(ii1 == cii);
32
33 assert(!(ii1 != ii2));
34 assert(!(ii1 != cii));
35
36#if TEST_STD_VER >= 17
37 C c = MAKE_STRING_VIEW(CharT, "abc");
38 assert(c.begin() == std::begin(c));
39 assert(c.rbegin() == std::rbegin(c));
40 assert(c.cbegin() == std::cbegin(c));
41 assert(c.crbegin() == std::crbegin(c));
42
43 assert(c.end() == std::end(c));
44 assert(c.rend() == std::rend(c));
45 assert(c.cend() == std::cend(c));
46 assert(c.crend() == std::crend(c));
47
48 assert(std::begin(c) != std::end(c));
49 assert(std::rbegin(c) != std::rend(c));
50 assert(std::cbegin(c) != std::cend(c));
51 assert(std::crbegin(c) != std::crend(c));
52#endif
53
54#if TEST_STD_VER >= 20
55 // P1614 + LWG3352
56 std::same_as<std::strong_ordering> decltype(auto) r1 = ii1 <=> ii2;
57 assert(r1 == std::strong_ordering::equal);
58
59 std::same_as<std::strong_ordering> decltype(auto) r2 = ii1 <=> ii2;
60 assert(r2 == std::strong_ordering::equal);
61#endif
62}
63
64TEST_CONSTEXPR_CXX14 bool test() {
65 test_type<char>();
66#ifndef TEST_HAS_NO_WIDE_CHARACTERS
67 test_type<wchar_t>();
68#endif
69#ifndef TEST_HAS_NO_CHAR8_T
70 test_type<char8_t>();
71#endif
72 test_type<char16_t>();
73 test_type<char32_t>();
74
75 return true;
76}
77
78int main(int, char**) {
79 test();
80#if TEST_STD_VER >= 14
81 static_assert(test(), "");
82#endif
83
84 return 0;
85}
86

source code of libcxx/test/std/strings/string.view/string.view.iterators/iterators.pass.cpp