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 basic_string& str, 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>
test(const S & s,const S & str,typename S::size_type pos,typename S::size_type x)20 TEST_CONSTEXPR_CXX20 void test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x) {
21 LIBCPP_ASSERT_NOEXCEPT(s.rfind(str, pos));
22 assert(s.rfind(str, pos) == x);
23 if (x != S::npos)
24 assert(x <= pos && x + str.size() <= s.size());
25 }
26
27 template <class S>
test(const S & s,const S & str,typename S::size_type x)28 TEST_CONSTEXPR_CXX20 void test(const S& s, const S& str, typename S::size_type x) {
29 LIBCPP_ASSERT_NOEXCEPT(s.rfind(str));
30 assert(s.rfind(str) == x);
31 if (x != S::npos)
32 assert(0 <= x && x + str.size() <= s.size());
33 }
34
35 template <class S>
test_string()36 TEST_CONSTEXPR_CXX20 void test_string() {
37 {
38 test(S(""), S(""), 0, 0);
39 test(S(""), S("abcde"), 0, S::npos);
40 test(S(""), S("abcdeabcde"), 0, S::npos);
41 test(S(""), S("abcdeabcdeabcdeabcde"), 0, S::npos);
42 test(S(""), S(""), 1, 0);
43 test(S(""), S("abcde"), 1, S::npos);
44 test(S(""), S("abcdeabcde"), 1, S::npos);
45 test(S(""), S("abcdeabcdeabcdeabcde"), 1, S::npos);
46 test(S("abcde"), S(""), 0, 0);
47 test(S("abcde"), S("abcde"), 0, 0);
48 test(S("abcde"), S("abcdeabcde"), 0, S::npos);
49 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
50 test(S("abcde"), S(""), 1, 1);
51 test(S("abcde"), S("abcde"), 1, 0);
52 test(S("abcde"), S("abcdeabcde"), 1, S::npos);
53 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
54 test(S("abcde"), S(""), 2, 2);
55 test(S("abcde"), S("abcde"), 2, 0);
56 test(S("abcde"), S("abcdeabcde"), 2, S::npos);
57 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 2, S::npos);
58 test(S("abcde"), S(""), 4, 4);
59 test(S("abcde"), S("abcde"), 4, 0);
60 test(S("abcde"), S("abcdeabcde"), 4, S::npos);
61 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 4, S::npos);
62 test(S("abcde"), S(""), 5, 5);
63 test(S("abcde"), S("abcde"), 5, 0);
64 test(S("abcde"), S("abcdeabcde"), 5, S::npos);
65 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
66 test(S("abcde"), S(""), 6, 5);
67 test(S("abcde"), S("abcde"), 6, 0);
68 test(S("abcde"), S("abcdeabcde"), 6, S::npos);
69 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 6, S::npos);
70 test(S("abcdeabcde"), S(""), 0, 0);
71 test(S("abcdeabcde"), S("abcde"), 0, 0);
72 test(S("abcdeabcde"), S("abcdeabcde"), 0, 0);
73 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
74 test(S("abcdeabcde"), S(""), 1, 1);
75 test(S("abcdeabcde"), S("abcde"), 1, 0);
76 test(S("abcdeabcde"), S("abcdeabcde"), 1, 0);
77 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
78 test(S("abcdeabcde"), S(""), 5, 5);
79 test(S("abcdeabcde"), S("abcde"), 5, 5);
80 test(S("abcdeabcde"), S("abcdeabcde"), 5, 0);
81 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
82 test(S("abcdeabcde"), S(""), 9, 9);
83 test(S("abcdeabcde"), S("abcde"), 9, 5);
84 test(S("abcdeabcde"), S("abcdeabcde"), 9, 0);
85 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 9, S::npos);
86 test(S("abcdeabcde"), S(""), 10, 10);
87 test(S("abcdeabcde"), S("abcde"), 10, 5);
88 test(S("abcdeabcde"), S("abcdeabcde"), 10, 0);
89 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
90 test(S("abcdeabcde"), S(""), 11, 10);
91 test(S("abcdeabcde"), S("abcde"), 11, 5);
92 test(S("abcdeabcde"), S("abcdeabcde"), 11, 0);
93 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 11, S::npos);
94 test(S("abcdeabcdeabcdeabcde"), S(""), 0, 0);
95 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0, 0);
96 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0, 0);
97 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, 0);
98 test(S("abcdeabcdeabcdeabcde"), S(""), 1, 1);
99 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 1, 0);
100 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 1, 0);
101 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, 0);
102 test(S("abcdeabcdeabcdeabcde"), S(""), 10, 10);
103 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 10, 10);
104 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10, 10);
105 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, 0);
106 test(S("abcdeabcdeabcdeabcde"), S(""), 19, 19);
107 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 19, 15);
108 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 19, 10);
109 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 19, 0);
110 test(S("abcdeabcdeabcdeabcde"), S(""), 20, 20);
111 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 20, 15);
112 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 20, 10);
113 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 20, 0);
114 test(S("abcdeabcdeabcdeabcde"), S(""), 21, 20);
115 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 21, 15);
116 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 21, 10);
117 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 21, 0);
118 }
119 {
120 test(S(""), S(""), 0);
121 test(S(""), S("abcde"), S::npos);
122 test(S(""), S("abcdeabcde"), S::npos);
123 test(S(""), S("abcdeabcdeabcdeabcde"), S::npos);
124 test(S("abcde"), S(""), 5);
125 test(S("abcde"), S("abcde"), 0);
126 test(S("abcde"), S("abcdeabcde"), S::npos);
127 test(S("abcde"), S("abcdeabcdeabcdeabcde"), S::npos);
128 test(S("abcdeabcde"), S(""), 10);
129 test(S("abcdeabcde"), S("abcde"), 5);
130 test(S("abcdeabcde"), S("abcdeabcde"), 0);
131 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), S::npos);
132 test(S("abcdeabcdeabcdeabcde"), S(""), 20);
133 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 15);
134 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10);
135 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0);
136 }
137 }
138
tests()139 TEST_CONSTEXPR_CXX20 bool tests() {
140 test_string<std::string>();
141 #if TEST_STD_VER >= 11
142 test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
143 { // LWG 2946
144 std::string s = " !";
145 assert(s.rfind({"abc", 1}) == std::string::npos);
146 }
147 #endif
148
149 return true;
150 }
151
main(int,char **)152 int main(int, char**) {
153 tests();
154 #if TEST_STD_VER > 17
155 static_assert(tests());
156 #endif
157
158 return 0;
159 }
160