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
9 
10 // <string_view>
11 
12 //   constexpr bool ends_with(string_view x) const noexcept;
13 
14 #include <string_view>
15 #include <cassert>
16 
17 #include "test_macros.h"
18 #include "constexpr_char_traits.h"
19 
20 int main(int, char**)
21 {
22     {
23     typedef std::string_view SV;
24     const char *s = "abcde";
25     SV  sv0;
26     SV  sv1 { s + 4, 1 };
27     SV  sv2 { s + 3, 2 };
28     SV  sv3 { s + 2, 3 };
29     SV  sv4 { s + 1, 4 };
30     SV  sv5 { s    , 5 };
31     SV  svNot {"def", 3 };
32 
33     ASSERT_NOEXCEPT(sv0.ends_with(sv0));
34 
35     assert ( sv0.ends_with(sv0));
36     assert (!sv0.ends_with(sv1));
37 
38     assert ( sv1.ends_with(sv0));
39     assert ( sv1.ends_with(sv1));
40     assert (!sv1.ends_with(sv2));
41     assert (!sv1.ends_with(sv3));
42     assert (!sv1.ends_with(sv4));
43     assert (!sv1.ends_with(sv5));
44     assert (!sv1.ends_with(svNot));
45 
46     assert ( sv2.ends_with(sv0));
47     assert ( sv2.ends_with(sv1));
48     assert ( sv2.ends_with(sv2));
49     assert (!sv2.ends_with(sv3));
50     assert (!sv2.ends_with(sv4));
51     assert (!sv2.ends_with(sv5));
52     assert (!sv2.ends_with(svNot));
53 
54     assert ( svNot.ends_with(sv0));
55     assert (!svNot.ends_with(sv1));
56     assert (!svNot.ends_with(sv2));
57     assert (!svNot.ends_with(sv3));
58     assert (!svNot.ends_with(sv4));
59     assert (!svNot.ends_with(sv5));
60     assert ( svNot.ends_with(svNot));
61     }
62 
63 #if TEST_STD_VER > 11
64     {
65     typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
66     constexpr const char *s = "abcde";
67     constexpr SV  sv0 {};
68     constexpr SV  sv1 { s + 4, 1 };
69     constexpr SV  sv2 { s + 3, 2 };
70     constexpr SV  sv3 { s + 2, 3 };
71     constexpr SV  sv4 { s + 1, 4 };
72     constexpr SV  sv5 { s,     5 };
73     constexpr SV  svNot {"def", 3 };
74 
75     static_assert ( sv0.ends_with(sv0), "" );
76     static_assert (!sv0.ends_with(sv1), "" );
77 
78     static_assert ( sv1.ends_with(sv0), "" );
79     static_assert ( sv1.ends_with(sv1), "" );
80     static_assert (!sv1.ends_with(sv2), "" );
81     static_assert (!sv1.ends_with(sv3), "" );
82     static_assert (!sv1.ends_with(sv4), "" );
83     static_assert (!sv1.ends_with(sv5), "" );
84     static_assert (!sv1.ends_with(svNot), "" );
85 
86     static_assert ( sv2.ends_with(sv0), "" );
87     static_assert ( sv2.ends_with(sv1), "" );
88     static_assert ( sv2.ends_with(sv2), "" );
89     static_assert (!sv2.ends_with(sv3), "" );
90     static_assert (!sv2.ends_with(sv4), "" );
91     static_assert (!sv2.ends_with(sv5), "" );
92     static_assert (!sv2.ends_with(svNot), "" );
93 
94     static_assert ( svNot.ends_with(sv0), "" );
95     static_assert (!svNot.ends_with(sv1), "" );
96     static_assert (!svNot.ends_with(sv2), "" );
97     static_assert (!svNot.ends_with(sv3), "" );
98     static_assert (!svNot.ends_with(sv4), "" );
99     static_assert (!svNot.ends_with(sv5), "" );
100     static_assert ( svNot.ends_with(svNot), "" );
101     }
102 #endif
103 
104   return 0;
105 }
106