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