1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
10
11 // <string>
12
13 // bool starts_with(string_view x) const noexcept;
14
15 #include <string>
16 #include <cassert>
17
18 #include "test_macros.h"
19
main()20 int main()
21 {
22 {
23 typedef std::string S;
24 typedef std::string_view SV;
25 const char *s = "abcde";
26
27 S s0;
28 S s1 { s, 1 };
29 S s2 { s, 2 };
30 // S s3 { s, 3 };
31 // S s4 { s, 4 };
32 // S s5 { s, 5 };
33 S sNot { "def", 3 };
34
35 SV sv0;
36 SV sv1 { s, 1 };
37 SV sv2 { s, 2 };
38 SV sv3 { s, 3 };
39 SV sv4 { s, 4 };
40 SV sv5 { s, 5 };
41 SV svNot {"def", 3 };
42
43 ASSERT_NOEXCEPT(s0.starts_with(sv0));
44
45 assert ( s0.starts_with(sv0));
46 assert (!s0.starts_with(sv1));
47
48 assert ( s1.starts_with(sv0));
49 assert ( s1.starts_with(sv1));
50 assert (!s1.starts_with(sv2));
51 assert (!s1.starts_with(sv3));
52 assert (!s1.starts_with(sv4));
53 assert (!s1.starts_with(sv5));
54 assert (!s1.starts_with(svNot));
55
56 assert ( s2.starts_with(sv0));
57 assert ( s2.starts_with(sv1));
58 assert ( s2.starts_with(sv2));
59 assert (!s2.starts_with(sv3));
60 assert (!s2.starts_with(sv4));
61 assert (!s2.starts_with(sv5));
62 assert (!s2.starts_with(svNot));
63
64 assert ( sNot.starts_with(sv0));
65 assert (!sNot.starts_with(sv1));
66 assert (!sNot.starts_with(sv2));
67 assert (!sNot.starts_with(sv3));
68 assert (!sNot.starts_with(sv4));
69 assert (!sNot.starts_with(sv5));
70 assert ( sNot.starts_with(svNot));
71 }
72 }
73