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 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10 
11 // <string_view>
12 
13 // constexpr const _CharT* data() const noexcept;
14 
15 #include <string_view>
16 #include <cassert>
17 #include <iterator>
18 
19 #include "test_macros.h"
20 
21 template <typename CharT>
22 void test ( const CharT *s, size_t len ) {
23     std::basic_string_view<CharT> sv ( s, len );
24     assert ( sv.length() == len );
25     assert ( sv.data() == s );
26 #if TEST_STD_VER > 14
27 //  make sure we pick up std::data, too!
28     assert ( sv.data() == std::data(sv));
29 #endif
30     }
31 
32 int main(int, char**) {
33     test ( "ABCDE", 5 );
34     test ( "a", 1 );
35 
36     test ( L"ABCDE", 5 );
37     test ( L"a", 1 );
38 
39 #if TEST_STD_VER >= 11
40     test ( u"ABCDE", 5 );
41     test ( u"a", 1 );
42 
43     test ( U"ABCDE", 5 );
44     test ( U"a", 1 );
45 #endif
46 
47 #if TEST_STD_VER > 11
48     {
49     constexpr const char *s = "ABC";
50     constexpr std::basic_string_view<char> sv( s, 2 );
51     static_assert( sv.length() ==  2,  "" );
52     static_assert( sv.data() == s, "" );
53     }
54 #endif
55 
56   return 0;
57 }
58