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 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
9 
10 // <string>
11 
12 //   constexpr bool contains(basic_string_view x) const noexcept;
13 
14 #include <string>
15 #include <cassert>
16 
17 #include "test_macros.h"
18 
19 void test()
20 {
21     using S = std::string;
22     using SV = std::string_view;
23 
24     const char* s = "abcde";
25     S s0;
26     S s1 {s + 1, 1};
27     S s3 {s + 1, 3};
28     S s5 {s    , 5};
29     S sNot {"xyz", 3};
30 
31     SV sv0;
32     SV sv1 {s + 1, 1};
33     SV sv2 {s + 1, 2};
34     SV sv3 {s + 1, 3};
35     SV sv4 {s + 1, 4};
36     SV sv5 {s    , 5};
37     SV svNot  {"xyz", 3};
38     SV svNot2 {"bd" , 2};
39     SV svNot3 {"dcb", 3};
40 
41     ASSERT_NOEXCEPT(s0.contains(sv0));
42 
43     assert( s0.contains(sv0));
44     assert(!s0.contains(sv1));
45 
46     assert( s1.contains(sv0));
47     assert( s1.contains(sv1));
48     assert(!s1.contains(sv2));
49     assert(!s1.contains(sv3));
50     assert(!s1.contains(sv4));
51     assert(!s1.contains(sv5));
52     assert(!s1.contains(svNot));
53     assert(!s1.contains(svNot2));
54     assert(!s1.contains(svNot3));
55 
56     assert( s3.contains(sv0));
57     assert( s3.contains(sv1));
58     assert( s3.contains(sv2));
59     assert( s3.contains(sv3));
60     assert(!s3.contains(sv4));
61     assert(!s3.contains(sv5));
62     assert(!s3.contains(svNot));
63     assert(!s3.contains(svNot2));
64     assert(!s3.contains(svNot3));
65 
66     assert( s5.contains(sv0));
67     assert( s5.contains(sv1));
68     assert( s5.contains(sv2));
69     assert( s5.contains(sv3));
70     assert( s5.contains(sv4));
71     assert( s5.contains(sv5));
72     assert(!s5.contains(svNot));
73     assert(!s5.contains(svNot2));
74     assert(!s5.contains(svNot3));
75 
76     assert( sNot.contains(sv0));
77     assert(!sNot.contains(sv1));
78     assert(!sNot.contains(sv2));
79     assert(!sNot.contains(sv3));
80     assert(!sNot.contains(sv4));
81     assert(!sNot.contains(sv5));
82     assert( sNot.contains(svNot));
83     assert(!sNot.contains(svNot2));
84     assert(!sNot.contains(svNot3));
85 }
86 
87 int main(int, char**)
88 {
89     test();
90 
91     return 0;
92 }
93