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// constexpr basic_string_view(const _CharT* _s)
14//    : __data (_s), __size(_Traits::length(_s)) {}
15
16
17#include <experimental/string_view>
18#include <string>
19#include <cassert>
20
21#include "constexpr_char_traits.hpp"
22
23template<typename CharT>
24size_t StrLen ( const CharT *s ) {
25    size_t retVal = 0;
26    while ( *s != 0 ) { ++retVal; ++s; }
27    return retVal;
28    }
29
30template<typename CharT>
31void test ( const CharT *s ) {
32    std::experimental::basic_string_view<CharT> sv1 ( s );
33    assert ( sv1.size() == StrLen( s ));
34    assert ( sv1.data() == s );
35    }
36
37
38int main () {
39
40    test ( "QBCDE" );
41    test ( "A" );
42    test ( "" );
43
44    test ( L"QBCDE" );
45    test ( L"A" );
46    test ( L"" );
47
48#if __cplusplus >= 201103L
49    test ( u"QBCDE" );
50    test ( u"A" );
51    test ( u"" );
52
53    test ( U"QBCDE" );
54    test ( U"A" );
55    test ( U"" );
56#endif
57
58#if _LIBCPP_STD_VER > 11
59    {
60    constexpr std::experimental::basic_string_view<char, constexpr_char_traits<char>> sv1 ( "ABCDE" );
61    static_assert ( sv1.size() == 5, "");
62    }
63#endif
64}
65