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 template<typename CharT>
test(const CharT * s,size_t len)19 void test ( const CharT *s, size_t len ) {
20 typedef std::experimental::basic_string_view<CharT> SV;
21 {
22 SV sv1(s);
23 SV sv2;
24
25 assert ( sv1.size() == len );
26 assert ( sv1.data() == s );
27 assert ( sv2.size() == 0 );
28
29 sv1.swap ( sv2 );
30 assert ( sv1.size() == 0 );
31 assert ( sv2.size() == len );
32 assert ( sv2.data() == s );
33 }
34
35 }
36
37 #if _LIBCPP_STD_VER > 11
test_ce(size_t n,size_t k)38 constexpr size_t test_ce ( size_t n, size_t k ) {
39 typedef std::experimental::basic_string_view<char> SV;
40 SV sv1{ "ABCDEFGHIJKL", n };
41 SV sv2 { sv1.data(), k };
42 sv1.swap ( sv2 );
43 return sv1.size();
44 }
45 #endif
46
47
main()48 int main () {
49 test ( "ABCDE", 5 );
50 test ( "a", 1 );
51 test ( "", 0 );
52
53 test ( L"ABCDE", 5 );
54 test ( L"a", 1 );
55 test ( L"", 0 );
56
57 #if __cplusplus >= 201103L
58 test ( u"ABCDE", 5 );
59 test ( u"a", 1 );
60 test ( u"", 0 );
61
62 test ( U"ABCDE", 5 );
63 test ( U"a", 1 );
64 test ( U"", 0 );
65 #endif
66
67 #if _LIBCPP_STD_VER > 11
68 {
69 static_assert ( test_ce (2, 3) == 3, "" );
70 static_assert ( test_ce (5, 3) == 3, "" );
71 static_assert ( test_ce (0, 1) == 1, "" );
72 }
73 #endif
74 }
75