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// constexpr const_iterator end() const;
14
15#include <string_view>
16#include <cassert>
17#include <cstddef>
18
19#include "test_macros.h"
20
21template <class S>
22void test(S s) {
23 const S& cs = s;
24 typename S::iterator e = s.end();
25 typename S::const_iterator ce1 = cs.end();
26 typename S::const_iterator ce2 = s.cend();
27
28 if (s.empty()) {
29 assert(e == s.begin());
30 assert(ce1 == cs.begin());
31 assert(ce2 == s.begin());
32 } else {
33 assert(e != s.begin());
34 assert(ce1 != cs.begin());
35 assert(ce2 != s.begin());
36 }
37
38 assert(static_cast<std::size_t>(e - s.begin()) == s.size());
39 assert(static_cast<std::size_t>(ce1 - cs.begin()) == cs.size());
40 assert(static_cast<std::size_t>(ce2 - s.cbegin()) == s.size());
41
42 assert(e == ce1);
43 assert(e == ce2);
44 assert(ce1 == ce2);
45}
46
47int main(int, char**) {
48 typedef std::string_view string_view;
49#ifndef TEST_HAS_NO_CHAR8_T
50 typedef std::u8string_view u8string_view;
51#endif
52 typedef std::u16string_view u16string_view;
53 typedef std::u32string_view u32string_view;
54
55 test(string_view());
56 test(u16string_view());
57 test(u32string_view());
58 test(string_view("123"));
59#ifndef TEST_HAS_NO_CHAR8_T
60 test(u8string_view{u8"123"});
61#endif
62#if TEST_STD_VER >= 11
63 test(u16string_view{u"123"});
64 test(u32string_view{U"123"});
65#endif
66
67#ifndef TEST_HAS_NO_WIDE_CHARACTERS
68 typedef std::wstring_view wstring_view;
69 test(wstring_view());
70 test(wstring_view(L"123"));
71#endif
72
73#if TEST_STD_VER > 11
74 {
75 constexpr string_view sv{"123", 3};
76# ifndef TEST_HAS_NO_CHAR8_T
77 constexpr u8string_view u8sv{u8"123", 3};
78# endif
79 constexpr u16string_view u16sv{u"123", 3};
80 constexpr u32string_view u32sv{U"123", 3};
81
82 static_assert(sv.begin() != sv.end(), "");
83# ifndef TEST_HAS_NO_CHAR8_T
84 static_assert(u8sv.begin() != u8sv.end(), "");
85# endif
86 static_assert(u16sv.begin() != u16sv.end(), "");
87 static_assert(u32sv.begin() != u32sv.end(), "");
88
89 static_assert(sv.begin() != sv.cend(), "");
90# ifndef TEST_HAS_NO_CHAR8_T
91 static_assert(u8sv.begin() != u8sv.cend(), "");
92# endif
93 static_assert(u16sv.begin() != u16sv.cend(), "");
94 static_assert(u32sv.begin() != u32sv.cend(), "");
95
96# ifndef TEST_HAS_NO_WIDE_CHARACTERS
97 {
98 constexpr wstring_view wsv{L"123", 3};
99 static_assert(wsv.begin() != wsv.end(), "");
100 static_assert(wsv.begin() != wsv.cend(), "");
101 }
102# endif
103 }
104#endif // TEST_STD_VER > 11
105
106 return 0;
107}
108

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