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& front();
14
15 #include <string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19
20 template <typename CharT>
test(const CharT * s,size_t len)21 bool test ( const CharT *s, size_t len ) {
22 std::basic_string_view<CharT> sv ( s, len );
23 assert ( sv.length() == len );
24 assert ( sv.back() == s[len-1] );
25 return &sv.back() == s + len - 1;
26 }
27
main()28 int main () {
29 assert ( test ( "ABCDE", 5 ));
30 assert ( test ( "a", 1 ));
31
32 assert ( test ( L"ABCDE", 5 ));
33 assert ( test ( L"a", 1 ));
34
35 #if TEST_STD_VER >= 11
36 assert ( test ( u"ABCDE", 5 ));
37 assert ( test ( u"a", 1 ));
38
39 assert ( test ( U"ABCDE", 5 ));
40 assert ( test ( U"a", 1 ));
41 #endif
42
43 #if TEST_STD_VER >= 11
44 {
45 constexpr std::basic_string_view<char> sv ( "ABC", 2 );
46 static_assert ( sv.length() == 2, "" );
47 static_assert ( sv.back() == 'B', "" );
48 }
49 #endif
50 }
51