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 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11 // <string_view>
12
13 // constexpr size_type find(const basic_string_view& str, size_type pos = 0) const;
14
15 #include <string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "constexpr_char_traits.h"
20
21 template <class S>
22 void
test(const S & s,const S & str,typename S::size_type pos,typename S::size_type x)23 test(const S& s, const S& str, typename S::size_type pos, typename S::size_type x)
24 {
25 LIBCPP_ASSERT_NOEXCEPT(s.find(str, pos));
26 assert(s.find(str, pos) == x);
27 if (x != S::npos)
28 assert(pos <= x && x + str.size() <= s.size());
29 }
30
31 template <class S>
32 void
test(const S & s,const S & str,typename S::size_type x)33 test(const S& s, const S& str, typename S::size_type x)
34 {
35 LIBCPP_ASSERT_NOEXCEPT(s.find(str));
36 assert(s.find(str) == x);
37 if (x != S::npos)
38 assert(0 <= x && x + str.size() <= s.size());
39 }
40
41 template <class S>
test0()42 void test0()
43 {
44 test(S(""), S(""), 0, 0);
45 test(S(""), S("abcde"), 0, S::npos);
46 test(S(""), S("abcdeabcde"), 0, S::npos);
47 test(S(""), S("abcdeabcdeabcdeabcde"), 0, S::npos);
48 test(S(""), S(""), 1, S::npos);
49 test(S(""), S("abcde"), 1, S::npos);
50 test(S(""), S("abcdeabcde"), 1, S::npos);
51 test(S(""), S("abcdeabcdeabcdeabcde"), 1, S::npos);
52 test(S("abcde"), S(""), 0, 0);
53 test(S("abcde"), S("abcde"), 0, 0);
54 test(S("abcde"), S("abcdeabcde"), 0, S::npos);
55 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
56 test(S("abcde"), S(""), 1, 1);
57 test(S("abcde"), S("abcde"), 1, S::npos);
58 test(S("abcde"), S("abcdeabcde"), 1, S::npos);
59 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
60 test(S("abcde"), S(""), 2, 2);
61 test(S("abcde"), S("abcde"), 2, S::npos);
62 test(S("abcde"), S("abcdeabcde"), 2, S::npos);
63 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 2, S::npos);
64 test(S("abcde"), S(""), 4, 4);
65 test(S("abcde"), S("abcde"), 4, S::npos);
66 test(S("abcde"), S("abcdeabcde"), 4, S::npos);
67 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 4, S::npos);
68 test(S("abcde"), S(""), 5, 5);
69 test(S("abcde"), S("abcde"), 5, S::npos);
70 test(S("abcde"), S("abcdeabcde"), 5, S::npos);
71 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
72 test(S("abcde"), S(""), 6, S::npos);
73 test(S("abcde"), S("abcde"), 6, S::npos);
74 test(S("abcde"), S("abcdeabcde"), 6, S::npos);
75 test(S("abcde"), S("abcdeabcdeabcdeabcde"), 6, S::npos);
76 test(S("abcdeabcde"), S(""), 0, 0);
77 test(S("abcdeabcde"), S("abcde"), 0, 0);
78 test(S("abcdeabcde"), S("abcdeabcde"), 0, 0);
79 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, S::npos);
80 test(S("abcdeabcde"), S(""), 1, 1);
81 test(S("abcdeabcde"), S("abcde"), 1, 5);
82 test(S("abcdeabcde"), S("abcdeabcde"), 1, S::npos);
83 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
84 test(S("abcdeabcde"), S(""), 5, 5);
85 test(S("abcdeabcde"), S("abcde"), 5, 5);
86 test(S("abcdeabcde"), S("abcdeabcde"), 5, S::npos);
87 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 5, S::npos);
88 test(S("abcdeabcde"), S(""), 9, 9);
89 test(S("abcdeabcde"), S("abcde"), 9, S::npos);
90 test(S("abcdeabcde"), S("abcdeabcde"), 9, S::npos);
91 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 9, S::npos);
92 test(S("abcdeabcde"), S(""), 10, 10);
93 test(S("abcdeabcde"), S("abcde"), 10, S::npos);
94 test(S("abcdeabcde"), S("abcdeabcde"), 10, S::npos);
95 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
96 test(S("abcdeabcde"), S(""), 11, S::npos);
97 test(S("abcdeabcde"), S("abcde"), 11, S::npos);
98 test(S("abcdeabcde"), S("abcdeabcde"), 11, S::npos);
99 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), 11, S::npos);
100 test(S("abcdeabcdeabcdeabcde"), S(""), 0, 0);
101 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0, 0);
102 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0, 0);
103 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0, 0);
104 test(S("abcdeabcdeabcdeabcde"), S(""), 1, 1);
105 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 1, 5);
106 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 1, 5);
107 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 1, S::npos);
108 test(S("abcdeabcdeabcdeabcde"), S(""), 10, 10);
109 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 10, 10);
110 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 10, 10);
111 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 10, S::npos);
112 test(S("abcdeabcdeabcdeabcde"), S(""), 19, 19);
113 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 19, S::npos);
114 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 19, S::npos);
115 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 19, S::npos);
116 test(S("abcdeabcdeabcdeabcde"), S(""), 20, 20);
117 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 20, S::npos);
118 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 20, S::npos);
119 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 20, S::npos);
120 test(S("abcdeabcdeabcdeabcde"), S(""), 21, S::npos);
121 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 21, S::npos);
122 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 21, S::npos);
123 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 21, S::npos);
124 }
125
126 template <class S>
test1()127 void test1()
128 {
129 test(S(""), S(""), 0);
130 test(S(""), S("abcde"), S::npos);
131 test(S(""), S("abcdeabcde"), S::npos);
132 test(S(""), S("abcdeabcdeabcdeabcde"), S::npos);
133 test(S("abcde"), S(""), 0);
134 test(S("abcde"), S("abcde"), 0);
135 test(S("abcde"), S("abcdeabcde"), S::npos);
136 test(S("abcde"), S("abcdeabcdeabcdeabcde"), S::npos);
137 test(S("abcdeabcde"), S(""), 0);
138 test(S("abcdeabcde"), S("abcde"), 0);
139 test(S("abcdeabcde"), S("abcdeabcde"), 0);
140 test(S("abcdeabcde"), S("abcdeabcdeabcdeabcde"), S::npos);
141 test(S("abcdeabcdeabcdeabcde"), S(""), 0);
142 test(S("abcdeabcdeabcdeabcde"), S("abcde"), 0);
143 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcde"), 0);
144 test(S("abcdeabcdeabcdeabcde"), S("abcdeabcdeabcdeabcde"), 0);
145 }
146
main(int,char **)147 int main(int, char**)
148 {
149 {
150 typedef std::string_view S;
151 test0<S>();
152 test1<S>();
153 }
154
155 #if TEST_STD_VER > 11
156 {
157 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
158 constexpr SV sv1;
159 constexpr SV sv2 { "abcde", 5 };
160
161 static_assert (sv1.find(sv1) == 0, "" );
162 static_assert (sv1.find(sv2) == SV::npos, "" );
163 static_assert (sv2.find(sv1) == 0, "" );
164 static_assert (sv2.find(sv2) == 0, "" );
165 static_assert (sv2.find(sv2, 1 ) == SV::npos, "" );
166 }
167 #endif
168
169 return 0;
170 }
171