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
10
11 // <string_view>
12
13 // void swap(basic_string_view& _other) noexcept
14
15 #include <experimental/string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19
20 template<typename CharT>
test(const CharT * s,size_t len)21 void test ( const CharT *s, size_t len ) {
22 typedef std::experimental::basic_string_view<CharT> SV;
23 {
24 SV sv1(s);
25 SV sv2;
26
27 assert ( sv1.size() == len );
28 assert ( sv1.data() == s );
29 assert ( sv2.size() == 0 );
30
31 sv1.swap ( sv2 );
32 assert ( sv1.size() == 0 );
33 assert ( sv2.size() == len );
34 assert ( sv2.data() == s );
35 }
36
37 }
38
39 #if TEST_STD_VER > 11
test_ce(size_t n,size_t k)40 constexpr size_t test_ce ( size_t n, size_t k ) {
41 typedef std::experimental::basic_string_view<char> SV;
42 SV sv1{ "ABCDEFGHIJKL", n };
43 SV sv2 { sv1.data(), k };
44 sv1.swap ( sv2 );
45 return sv1.size();
46 }
47 #endif
48
49
main()50 int main () {
51 test ( "ABCDE", 5 );
52 test ( "a", 1 );
53 test ( "", 0 );
54
55 test ( L"ABCDE", 5 );
56 test ( L"a", 1 );
57 test ( L"", 0 );
58
59 #if TEST_STD_VER >= 11
60 test ( u"ABCDE", 5 );
61 test ( u"a", 1 );
62 test ( u"", 0 );
63
64 test ( U"ABCDE", 5 );
65 test ( U"a", 1 );
66 test ( U"", 0 );
67 #endif
68
69 #if TEST_STD_VER > 11
70 {
71 static_assert ( test_ce (2, 3) == 3, "" );
72 static_assert ( test_ce (5, 3) == 3, "" );
73 static_assert ( test_ce (0, 1) == 1, "" );
74 }
75 #endif
76 }
77