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 // <string>
10
11 // size_type rfind(const charT* s, size_type pos = npos) const; // constexpr since C++20
12
13 #include <string>
14 #include <cassert>
15
16 #include "test_macros.h"
17 #include "min_allocator.h"
18
19 template <class S>
20 TEST_CONSTEXPR_CXX20 void
test(const S & s,const typename S::value_type * str,typename S::size_type pos,typename S::size_type x)21 test(const S& s, const typename S::value_type* str, typename S::size_type pos,
22 typename S::size_type x)
23 {
24 LIBCPP_ASSERT_NOEXCEPT(s.rfind(str, pos));
25 assert(s.rfind(str, pos) == x);
26 if (x != S::npos)
27 {
28 typename S::size_type n = S::traits_type::length(str);
29 assert(x <= pos && x + n <= s.size());
30 }
31 }
32
33 template <class S>
34 TEST_CONSTEXPR_CXX20 void
test(const S & s,const typename S::value_type * str,typename S::size_type x)35 test(const S& s, const typename S::value_type* str, typename S::size_type x)
36 {
37 LIBCPP_ASSERT_NOEXCEPT(s.rfind(str));
38 assert(s.rfind(str) == x);
39 if (x != S::npos)
40 {
41 typename S::size_type pos = s.size();
42 typename S::size_type n = S::traits_type::length(str);
43 assert(x <= pos && x + n <= s.size());
44 }
45 }
46
47 template <class S>
test0()48 TEST_CONSTEXPR_CXX20 void test0()
49 {
50 test(S(""), "", 0, 0);
51 test(S(""), "abcde", 0, S::npos);
52 test(S(""), "abcdeabcde", 0, S::npos);
53 test(S(""), "abcdeabcdeabcdeabcde", 0, S::npos);
54 test(S(""), "", 1, 0);
55 test(S(""), "abcde", 1, S::npos);
56 test(S(""), "abcdeabcde", 1, S::npos);
57 test(S(""), "abcdeabcdeabcdeabcde", 1, S::npos);
58 test(S("abcde"), "", 0, 0);
59 test(S("abcde"), "abcde", 0, 0);
60 test(S("abcde"), "abcdeabcde", 0, S::npos);
61 test(S("abcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
62 test(S("abcde"), "", 1, 1);
63 test(S("abcde"), "abcde", 1, 0);
64 test(S("abcde"), "abcdeabcde", 1, S::npos);
65 test(S("abcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
66 test(S("abcde"), "", 2, 2);
67 test(S("abcde"), "abcde", 2, 0);
68 test(S("abcde"), "abcdeabcde", 2, S::npos);
69 test(S("abcde"), "abcdeabcdeabcdeabcde", 2, S::npos);
70 test(S("abcde"), "", 4, 4);
71 test(S("abcde"), "abcde", 4, 0);
72 test(S("abcde"), "abcdeabcde", 4, S::npos);
73 test(S("abcde"), "abcdeabcdeabcdeabcde", 4, S::npos);
74 test(S("abcde"), "", 5, 5);
75 test(S("abcde"), "abcde", 5, 0);
76 test(S("abcde"), "abcdeabcde", 5, S::npos);
77 test(S("abcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
78 test(S("abcde"), "", 6, 5);
79 test(S("abcde"), "abcde", 6, 0);
80 test(S("abcde"), "abcdeabcde", 6, S::npos);
81 test(S("abcde"), "abcdeabcdeabcdeabcde", 6, S::npos);
82 test(S("abcdeabcde"), "", 0, 0);
83 test(S("abcdeabcde"), "abcde", 0, 0);
84 test(S("abcdeabcde"), "abcdeabcde", 0, 0);
85 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 0, S::npos);
86 test(S("abcdeabcde"), "", 1, 1);
87 test(S("abcdeabcde"), "abcde", 1, 0);
88 test(S("abcdeabcde"), "abcdeabcde", 1, 0);
89 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 1, S::npos);
90 test(S("abcdeabcde"), "", 5, 5);
91 test(S("abcdeabcde"), "abcde", 5, 5);
92 test(S("abcdeabcde"), "abcdeabcde", 5, 0);
93 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 5, S::npos);
94 test(S("abcdeabcde"), "", 9, 9);
95 test(S("abcdeabcde"), "abcde", 9, 5);
96 test(S("abcdeabcde"), "abcdeabcde", 9, 0);
97 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 9, S::npos);
98 test(S("abcdeabcde"), "", 10, 10);
99 test(S("abcdeabcde"), "abcde", 10, 5);
100 test(S("abcdeabcde"), "abcdeabcde", 10, 0);
101 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 10, S::npos);
102 test(S("abcdeabcde"), "", 11, 10);
103 test(S("abcdeabcde"), "abcde", 11, 5);
104 test(S("abcdeabcde"), "abcdeabcde", 11, 0);
105 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", 11, S::npos);
106 test(S("abcdeabcdeabcdeabcde"), "", 0, 0);
107 test(S("abcdeabcdeabcdeabcde"), "abcde", 0, 0);
108 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 0, 0);
109 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0, 0);
110 test(S("abcdeabcdeabcdeabcde"), "", 1, 1);
111 test(S("abcdeabcdeabcdeabcde"), "abcde", 1, 0);
112 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 1, 0);
113 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 1, 0);
114 test(S("abcdeabcdeabcdeabcde"), "", 10, 10);
115 test(S("abcdeabcdeabcdeabcde"), "abcde", 10, 10);
116 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10, 10);
117 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 10, 0);
118 test(S("abcdeabcdeabcdeabcde"), "", 19, 19);
119 test(S("abcdeabcdeabcdeabcde"), "abcde", 19, 15);
120 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 19, 10);
121 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 19, 0);
122 test(S("abcdeabcdeabcdeabcde"), "", 20, 20);
123 test(S("abcdeabcdeabcdeabcde"), "abcde", 20, 15);
124 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 20, 10);
125 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 20, 0);
126 test(S("abcdeabcdeabcdeabcde"), "", 21, 20);
127 test(S("abcdeabcdeabcdeabcde"), "abcde", 21, 15);
128 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 21, 10);
129 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 21, 0);
130 }
131
132 template <class S>
test1()133 TEST_CONSTEXPR_CXX20 void test1()
134 {
135 test(S(""), "", 0);
136 test(S(""), "abcde", S::npos);
137 test(S(""), "abcdeabcde", S::npos);
138 test(S(""), "abcdeabcdeabcdeabcde", S::npos);
139 test(S("abcde"), "", 5);
140 test(S("abcde"), "abcde", 0);
141 test(S("abcde"), "abcdeabcde", S::npos);
142 test(S("abcde"), "abcdeabcdeabcdeabcde", S::npos);
143 test(S("abcdeabcde"), "", 10);
144 test(S("abcdeabcde"), "abcde", 5);
145 test(S("abcdeabcde"), "abcdeabcde", 0);
146 test(S("abcdeabcde"), "abcdeabcdeabcdeabcde", S::npos);
147 test(S("abcdeabcdeabcdeabcde"), "", 20);
148 test(S("abcdeabcdeabcdeabcde"), "abcde", 15);
149 test(S("abcdeabcdeabcdeabcde"), "abcdeabcde", 10);
150 test(S("abcdeabcdeabcdeabcde"), "abcdeabcdeabcdeabcde", 0);
151 }
152
test()153 TEST_CONSTEXPR_CXX20 bool test() {
154 {
155 typedef std::string S;
156 test0<S>();
157 test1<S>();
158 }
159 #if TEST_STD_VER >= 11
160 {
161 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
162 test0<S>();
163 test1<S>();
164 }
165 #endif
166
167 return true;
168 }
169
main(int,char **)170 int main(int, char**)
171 {
172 test();
173 #if TEST_STD_VER > 17
174 static_assert(test());
175 #endif
176
177 return 0;
178 }
179