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 size_type rfind(const basic_string& str, size_type pos = npos) const;
14
15#include <string_view>
16#include <cassert>
17
18#include "test_macros.h"
19#include "constexpr_char_traits.h"
20
21template <class S>
22void test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x) {
23 LIBCPP_ASSERT_NOEXCEPT(s.rfind(str, pos));
24 assert(s.rfind(str, pos) == x);
25 if (x != S::npos)
26 assert(x <= pos && x + str.size() <= s.size());
27}
28
29template <class S>
30void test(const S& s, const S& str, typename S::size_type x) {
31 LIBCPP_ASSERT_NOEXCEPT(s.rfind(str));
32 assert(s.rfind(str) == x);
33 if (x != S::npos)
34 assert(0 <= x && x + str.size() <= s.size());
35}
36
37template <class S>
38void test0() {
39 test(S(""), S(""), 0, 0);
40 test(S(""), S("abcde"), 0, S::npos);
41 test(S(""), S("abcdeabcde"), 0, S::npos);
42 test(S(""), S("abcdeabcdeabcdeabcde"), 0, S::npos);
43 test(S(""), S(""), 1, 0);
44 test(S(""), S("abcde"), 1, S::npos);
45 test(S(""), S("abcdeabcde"), 1, S::npos);
46 test(S(""), S("abcdeabcdeabcdeabcde"), 1, S::npos);
47 test(S("abcde"), S(""), 0, 0);
48 test(S("abcde"), S("abcde"), 0, 0);
49 test(S("abcde"), S("abcdeabcde"), 0, S::npos);
50 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
51 test(S("abcde"), S(""), 1, 1);
52 test(S("abcde"), S("abcde"), 1, 0);
53 test(S("abcde"), S("abcdeabcde"), 1, S::npos);
54 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
55 test(S("abcde"), S(""), 2, 2);
56 test(S("abcde"), S("abcde"), 2, 0);
57 test(S("abcde"), S("abcdeabcde"), 2, S::npos);
58 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 2, S::npos);
59 test(S("abcde"), S(""), 4, 4);
60 test(S("abcde"), S("abcde"), 4, 0);
61 test(S("abcde"), S("abcdeabcde"), 4, S::npos);
62 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 4, S::npos);
63 test(S("abcde"), S(""), 5, 5);
64 test(S("abcde"), S("abcde"), 5, 0);
65 test(S("abcde"), S("abcdeabcde"), 5, S::npos);
66 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
67 test(S("abcde"), S(""), 6, 5);
68 test(S("abcde"), S("abcde"), 6, 0);
69 test(S("abcde"), S("abcdeabcde"), 6, S::npos);
70 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 6, S::npos);
71 test(S("abcdeabcde"), S(""), 0, 0);
72 test(S("abcdeabcde"), S("abcde"), 0, 0);
73 test(S("abcdeabcde"), S("abcdeabcde"), 0, 0);
74 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
75 test(S("abcdeabcde"), S(""), 1, 1);
76 test(S("abcdeabcde"), S("abcde"), 1, 0);
77 test(S("abcdeabcde"), S("abcdeabcde"), 1, 0);
78 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
79 test(S("abcdeabcde"), S(""), 5, 5);
80 test(S("abcdeabcde"), S("abcde"), 5, 5);
81 test(S("abcdeabcde"), S("abcdeabcde"), 5, 0);
82 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
83 test(S("abcdeabcde"), S(""), 9, 9);
84 test(S("abcdeabcde"), S("abcde"), 9, 5);
85 test(S("abcdeabcde"), S("abcdeabcde"), 9, 0);
86 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 9, S::npos);
87 test(S("abcdeabcde"), S(""), 10, 10);
88 test(S("abcdeabcde"), S("abcde"), 10, 5);
89 test(S("abcdeabcde"), S("abcdeabcde"), 10, 0);
90 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
91 test(S("abcdeabcde"), S(""), 11, 10);
92 test(S("abcdeabcde"), S("abcde"), 11, 5);
93 test(S("abcdeabcde"), S("abcdeabcde"), 11, 0);
94 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 11, S::npos);
95 test(S("abcdeabcdeabcdeabcde"), S(""), 0, 0);
96 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0, 0);
97 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0, 0);
98 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, 0);
99 test(S("abcdeabcdeabcdeabcde"), S(""), 1, 1);
100 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 1, 0);
101 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 1, 0);
102 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, 0);
103 test(S("abcdeabcdeabcdeabcde"), S(""), 10, 10);
104 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 10, 10);
105 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10, 10);
106 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, 0);
107 test(S("abcdeabcdeabcdeabcde"), S(""), 19, 19);
108 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 19, 15);
109 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 19, 10);
110 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 19, 0);
111 test(S("abcdeabcdeabcdeabcde"), S(""), 20, 20);
112 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 20, 15);
113 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 20, 10);
114 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 20, 0);
115 test(S("abcdeabcdeabcdeabcde"), S(""), 21, 20);
116 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 21, 15);
117 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 21, 10);
118 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 21, 0);
119}
120
121template <class S>
122void test1() {
123 test(S(""), S(""), 0);
124 test(S(""), S("abcde"), S::npos);
125 test(S(""), S("abcdeabcde"), S::npos);
126 test(S(""), S("abcdeabcdeabcdeabcde"), S::npos);
127 test(S("abcde"), S(""), 5);
128 test(S("abcde"), S("abcde"), 0);
129 test(S("abcde"), S("abcdeabcde"), S::npos);
130 test(S("abcde"), S("abcdeabcdeabcdeabcde"), S::npos);
131 test(S("abcdeabcde"), S(""), 10);
132 test(S("abcdeabcde"), S("abcde"), 5);
133 test(S("abcdeabcde"), S("abcdeabcde"), 0);
134 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), S::npos);
135 test(S("abcdeabcdeabcdeabcde"), S(""), 20);
136 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 15);
137 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10);
138 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0);
139}
140
141int main(int, char**) {
142 {
143 typedef std::string_view S;
144 test0<S>();
145 test1<S>();
146 }
147
148#if TEST_STD_VER > 11
149 {
150 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
151 constexpr SV sv1;
152 constexpr SV sv2{"abcde", 5};
153
154 static_assert(sv1.rfind(sv1) == 0, "");
155 static_assert(sv1.rfind(sv2) == SV::npos, "");
156 static_assert(sv2.rfind(sv1) == 5, "");
157 static_assert(sv2.rfind(sv2) == 0, "");
158 static_assert(sv2.rfind(sv2, 1) == 0, "");
159 }
160#endif
161
162 return 0;
163}
164

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