1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <string_view>
// constexpr const _CharT& operator[](size_type _pos) const;
#include <experimental/string_view>
#include <cassert>
template <typename CharT>
void test ( const CharT *s, size_t len ) {
std::experimental::basic_string_view<CharT> sv ( s, len );
assert ( sv.length() == len );
for ( size_t i = 0; i < len; ++i ) {
assert ( sv[i] == s[i] );
assert ( &sv[i] == s + i );
}
}
int main () {
test ( "ABCDE", 5 );
test ( "a", 1 );
test ( L"ABCDE", 5 );
test ( L"a", 1 );
#if __cplusplus >= 201103L
test ( u"ABCDE", 5 );
test ( u"a", 1 );
test ( U"ABCDE", 5 );
test ( U"a", 1 );
#endif
#if _LIBCPP_STD_VER > 11
{
constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 );
static_assert ( sv.length() == 2, "" );
static_assert ( sv[0] == 'A', "" );
static_assert ( sv[1] == 'B', "" );
}
#endif
}
|
