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& operator[](size_type _pos) const;
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 void test ( const CharT *s, size_t len ) {
22 std::basic_string_view<CharT> sv ( s, len );
23 assert ( sv.length() == len );
24 for ( size_t i = 0; i < len; ++i ) {
25 assert ( sv[i] == s[i] );
26 assert ( &sv[i] == s + i );
27 }
28 }
29
main()30 int main () {
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 std::basic_string_view<char> sv ( "ABC", 2 );
48 static_assert ( sv.length() == 2, "" );
49 static_assert ( sv[0] == 'A', "" );
50 static_assert ( sv[1] == 'B', "" );
51 }
52 #endif
53 }
54