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 
9 // <string_view>
10 
11 //  constexpr basic_string_view(const _CharT* _s, size_type _len)
12 //      : __data (_s), __size(_len) {}
13 
14 
15 #include <string_view>
16 #include <string>
17 #include <cassert>
18 
19 #include "test_macros.h"
20 
21 template<typename CharT>
22 void test ( const CharT *s, size_t sz ) {
23     {
24     typedef std::basic_string_view<CharT> SV;
25     LIBCPP_ASSERT_NOEXCEPT(SV(s, sz));
26 
27     SV sv1 ( s, sz );
28     assert ( sv1.size() == sz );
29     assert ( sv1.data() == s );
30     }
31 }
32 
33 int main(int, char**) {
34 
35     test ( "QBCDE", 5 );
36     test ( "QBCDE", 2 );
37     test ( "", 0 );
38 #if TEST_STD_VER > 11
39     {
40     constexpr const char *s = "QBCDE";
41     constexpr std::basic_string_view<char> sv1 ( s, 2 );
42     static_assert ( sv1.size() == 2, "" );
43     static_assert ( sv1.data() == s, "" );
44     }
45 #endif
46 
47     test ( L"QBCDE", 5 );
48     test ( L"QBCDE", 2 );
49     test ( L"", 0 );
50 #if TEST_STD_VER > 11
51     {
52     constexpr const wchar_t *s = L"QBCDE";
53     constexpr std::basic_string_view<wchar_t> sv1 ( s, 2 );
54     static_assert ( sv1.size() == 2, "" );
55     static_assert ( sv1.data() == s, "" );
56     }
57 #endif
58 
59 #if TEST_STD_VER >= 11
60     test ( u"QBCDE", 5 );
61     test ( u"QBCDE", 2 );
62     test ( u"", 0 );
63 #if TEST_STD_VER > 11
64     {
65     constexpr const char16_t *s = u"QBCDE";
66     constexpr std::basic_string_view<char16_t> sv1 ( s, 2 );
67     static_assert ( sv1.size() == 2, "" );
68     static_assert ( sv1.data() == s, "" );
69     }
70 #endif
71 
72     test ( U"QBCDE", 5 );
73     test ( U"QBCDE", 2 );
74     test ( U"", 0 );
75 #if TEST_STD_VER > 11
76     {
77     constexpr const char32_t *s = U"QBCDE";
78     constexpr std::basic_string_view<char32_t> sv1 ( s, 2 );
79     static_assert ( sv1.size() == 2, "" );
80     static_assert ( sv1.data() == s, "" );
81     }
82 #endif
83 #endif
84 
85   return 0;
86 }
87