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 const _CharT& back();
14
15 #include <experimental/string_view>
16 #include <cassert>
17
18 template <typename CharT>
test(const CharT * s,size_t len)19 bool test ( const CharT *s, size_t len ) {
20 std::experimental::basic_string_view<CharT> sv ( s, len );
21 assert ( sv.length() == len );
22 assert ( sv.front() == s[0] );
23 return &sv.front() == s;
24 }
25
main()26 int main () {
27 assert ( test ( "ABCDE", 5 ));
28 assert ( test ( "a", 1 ));
29
30 assert ( test ( L"ABCDE", 5 ));
31 assert ( test ( L"a", 1 ));
32
33 #if __cplusplus >= 201103L
34 assert ( test ( u"ABCDE", 5 ));
35 assert ( test ( u"a", 1 ));
36
37 assert ( test ( U"ABCDE", 5 ));
38 assert ( test ( U"a", 1 ));
39 #endif
40
41 #if __cplusplus >= 201103L
42 {
43 constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 );
44 static_assert ( sv.length() == 2, "" );
45 static_assert ( sv.front() == 'A', "" );
46 }
47 #endif
48 }
49