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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// Note: libc++ supports string_view before C++17, but literals were introduced in C++14
// UNSUPPORTED: c++03, c++11
// UNSUPPORTED: !stdlib=libc++ && c++14
#include <string_view>
#include <cassert>
#include "test_macros.h"
#ifndef TEST_HAS_NO_CHAR8_T
typedef std::u8string_view u8string_view;
#else
typedef std::string_view u8string_view;
#endif
int main(int, char**) {
{
using namespace std::literals::string_view_literals;
ASSERT_SAME_TYPE(decltype("Hi"sv), std::string_view);
ASSERT_SAME_TYPE(decltype(u8"Hi"sv), u8string_view);
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
ASSERT_SAME_TYPE(decltype(L"Hi"sv), std::wstring_view);
#endif
ASSERT_SAME_TYPE(decltype(u"Hi"sv), std::u16string_view);
ASSERT_SAME_TYPE(decltype(U"Hi"sv), std::u32string_view);
std::string_view foo;
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
std::wstring_view Lfoo;
#endif
u8string_view u8foo;
std::u16string_view ufoo;
std::u32string_view Ufoo;
foo = ""sv;
assert(foo.size() == 0);
u8foo = u8""sv;
assert(u8foo.size() == 0);
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
Lfoo = L""sv;
assert(Lfoo.size() == 0);
#endif
ufoo = u""sv;
assert(ufoo.size() == 0);
Ufoo = U""sv;
assert(Ufoo.size() == 0);
foo = " "sv;
assert(foo.size() == 1);
u8foo = u8" "sv;
assert(u8foo.size() == 1);
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
Lfoo = L" "sv;
assert(Lfoo.size() == 1);
#endif
ufoo = u" "sv;
assert(ufoo.size() == 1);
Ufoo = U" "sv;
assert(Ufoo.size() == 1);
foo = "ABC"sv;
assert(foo == "ABC");
assert(foo == std::string_view("ABC"));
u8foo = u8"ABC"sv;
assert(u8foo == u8"ABC");
assert(u8foo == u8string_view(u8"ABC"));
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
Lfoo = L"ABC"sv;
assert(Lfoo == L"ABC");
assert(Lfoo == std::wstring_view(L"ABC"));
#endif
ufoo = u"ABC"sv;
assert(ufoo == u"ABC");
assert(ufoo == std::u16string_view(u"ABC"));
Ufoo = U"ABC"sv;
assert(Ufoo == U"ABC");
assert(Ufoo == std::u32string_view(U"ABC"));
static_assert("ABC"sv.size() == 3, "");
static_assert(u8"ABC"sv.size() == 3, "");
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
static_assert(L"ABC"sv.size() == 3, "");
#endif
static_assert(u"ABC"sv.size() == 3, "");
static_assert(U"ABC"sv.size() == 3, "");
ASSERT_NOEXCEPT("ABC"sv);
ASSERT_NOEXCEPT(u8"ABC"sv);
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
ASSERT_NOEXCEPT(L"ABC"sv);
#endif
ASSERT_NOEXCEPT(u"ABC"sv);
ASSERT_NOEXCEPT(U"ABC"sv);
}
{
using namespace std::literals;
std::string_view foo = ""sv;
assert(foo.length() == 0);
}
{
using namespace std;
std::string_view foo = ""sv;
assert(foo.length() == 0);
}
return 0;
}
|
