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 
10 // <string_view>
11 
12 // constexpr const _CharT* data() const noexcept;
13 
14 #include <string_view>
15 #include <cassert>
16 
17 #include "test_macros.h"
18 
19 template <typename CharT>
20 void test ( const CharT *s, size_t len ) {
21     std::basic_string_view<CharT> sv ( s, len );
22     assert ( sv.length() == len );
23     assert ( sv.data() == s );
24 #if TEST_STD_VER > 14
25 //  make sure we pick up std::data, too!
26     assert ( sv.data() == std::data(sv));
27 #endif
28     }
29 
30 int main(int, char**) {
31     test ( "ABCDE", 5 );
32     test ( "a", 1 );
33 
34     test ( L"ABCDE", 5 );
35     test ( L"a", 1 );
36 
37 #if TEST_STD_VER >= 11
38     test ( u"ABCDE", 5 );
39     test ( u"a", 1 );
40 
41     test ( U"ABCDE", 5 );
42     test ( U"a", 1 );
43 #endif
44 
45 #if TEST_STD_VER > 11
46     {
47     constexpr const char *s = "ABC";
48     constexpr std::basic_string_view<char> sv( s, 2 );
49     static_assert( sv.length() ==  2,  "" );
50     static_assert( sv.data() == s, "" );
51     }
52 #endif
53 
54   return 0;
55 }
56