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