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
|
//===----------------------------------------------------------------------===//
//
// 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++03, c++11, c++14
// <optional>
// template <class U>
// optional(const optional<U>& rhs);
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
using std::optional;
template <class T, class U>
void
test(const optional<U>& rhs, bool is_going_to_throw = false)
{
bool rhs_engaged = static_cast<bool>(rhs);
#ifndef TEST_HAS_NO_EXCEPTIONS
try
{
optional<T> lhs = rhs;
assert(is_going_to_throw == false);
assert(static_cast<bool>(lhs) == rhs_engaged);
if (rhs_engaged)
assert(*lhs == *rhs);
}
catch (int i)
{
assert(i == 6);
}
#else
if (is_going_to_throw) return;
optional<T> lhs = rhs;
assert(static_cast<bool>(lhs) == rhs_engaged);
if (rhs_engaged)
assert(*lhs == *rhs);
#endif
}
class X
{
int i_;
public:
X(int i) : i_(i) {}
X(const X& x) : i_(x.i_) {}
~X() {i_ = 0;}
friend bool operator==(const X& x, const X& y) {return x.i_ == y.i_;}
};
class Y
{
int i_;
public:
Y(int i) : i_(i) {}
friend constexpr bool operator==(const Y& x, const Y& y) {return x.i_ == y.i_;}
};
int count = 0;
class Z
{
int i_;
public:
Z(int i) : i_(i) {TEST_THROW(6);}
friend constexpr bool operator==(const Z& x, const Z& y) {return x.i_ == y.i_;}
};
int main(int, char**)
{
{
typedef short U;
typedef int T;
optional<U> rhs;
test<T>(rhs);
}
{
typedef short U;
typedef int T;
optional<U> rhs(U{3});
test<T>(rhs);
}
{
typedef X T;
typedef int U;
optional<U> rhs;
test<T>(rhs);
}
{
typedef X T;
typedef int U;
optional<U> rhs(U{3});
test<T>(rhs);
}
{
typedef Y T;
typedef int U;
optional<U> rhs;
test<T>(rhs);
}
{
typedef Y T;
typedef int U;
optional<U> rhs(U{3});
test<T>(rhs);
}
{
typedef Z T;
typedef int U;
optional<U> rhs;
test<T>(rhs);
}
{
typedef Z T;
typedef int U;
optional<U> rhs(U{3});
test<T>(rhs, true);
}
static_assert(!(std::is_constructible<optional<X>, const optional<Y>&>::value), "");
return 0;
}
|
