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

source code of libcxx/test/std/strings/basic.string/string.ops/string_find/pointer_size.pass.cpp