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
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// XFAIL: availability=macosx10.13
// XFAIL: availability=macosx10.12
// XFAIL: availability=macosx10.11
// XFAIL: availability=macosx10.10
// XFAIL: availability=macosx10.9
// XFAIL: availability=macosx10.8
// XFAIL: availability=macosx10.7
// <any>
// template <class Value> any(Value &&)
// Test construction from a value.
// Concerns:
// ---------
// 1. The value is properly move/copied depending on the value category.
// 2. Both small and large values are properly handled.
#include <any>
#include <cassert>
#include "any_helpers.h"
#include "count_new.hpp"
#include "test_macros.h"
using std::any;
using std::any_cast;
template <class Type>
void test_copy_value_throws()
{
#if !defined(TEST_HAS_NO_EXCEPTIONS)
assert(Type::count == 0);
{
Type const t(42);
assert(Type::count == 1);
try {
any const a2(t);
assert(false);
} catch (my_any_exception const &) {
// do nothing
} catch (...) {
assert(false);
}
assert(Type::count == 1);
assert(t.value == 42);
}
assert(Type::count == 0);
#endif
}
void test_move_value_throws()
{
#if !defined(TEST_HAS_NO_EXCEPTIONS)
assert(throws_on_move::count == 0);
{
throws_on_move v;
assert(throws_on_move::count == 1);
try {
any const a(std::move(v));
assert(false);
} catch (my_any_exception const &) {
// do nothing
} catch (...) {
assert(false);
}
assert(throws_on_move::count == 1);
}
assert(throws_on_move::count == 0);
#endif
}
template <class Type>
void test_copy_move_value() {
// constructing from a small type should perform no allocations.
DisableAllocationGuard g(isSmallType<Type>()); ((void)g);
assert(Type::count == 0);
Type::reset();
{
Type t(42);
assert(Type::count == 1);
any a(t);
assert(Type::count == 2);
assert(Type::copied == 1);
assert(Type::moved == 0);
assertContains<Type>(a, 42);
}
assert(Type::count == 0);
Type::reset();
{
Type t(42);
assert(Type::count == 1);
any a(std::move(t));
assert(Type::count == 2);
assert(Type::copied == 0);
assert(Type::moved == 1);
assertContains<Type>(a, 42);
}
}
// Test that any(ValueType&&) is *never* selected for a std::in_place_type_t specialization.
void test_sfinae_constraints() {
using BadTag = std::in_place_type_t<int>;
using OKTag = std::in_place_t;
// Test that the tag type is properly handled in SFINAE
BadTag t = std::in_place_type<int>;
OKTag ot = std::in_place;
{
std::any a(t);
assertContains<int>(a, 0);
}
{
std::any a(std::move(t));
assertContains<int>(a, 0);
}
{
std::any a(ot);
assert(containsType<OKTag>(a));
}
{
struct Dummy { Dummy() = delete; };
using T = std::in_place_type_t<Dummy>;
static_assert(!std::is_constructible<std::any, T>::value, "");
}
{
// Test that the ValueType&& constructor SFINAE's away when the
// argument is non-copyable
struct NoCopy {
NoCopy() = default;
NoCopy(NoCopy const&) = delete;
NoCopy(int) {}
};
static_assert(!std::is_constructible<std::any, NoCopy>::value, "");
static_assert(!std::is_constructible<std::any, NoCopy&>::value, "");
static_assert(!std::is_convertible<NoCopy, std::any>::value, "");
}
}
int main() {
test_copy_move_value<small>();
test_copy_move_value<large>();
test_copy_value_throws<small_throws_on_copy>();
test_copy_value_throws<large_throws_on_copy>();
test_move_value_throws();
test_sfinae_constraints();
}
|
