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
|
//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// XFAIL: with_system_cxx_lib=macosx10.12
// XFAIL: with_system_cxx_lib=macosx10.11
// XFAIL: with_system_cxx_lib=macosx10.10
// XFAIL: with_system_cxx_lib=macosx10.9
// XFAIL: with_system_cxx_lib=macosx10.7
// XFAIL: with_system_cxx_lib=macosx10.8
// <optional>
// constexpr optional(const T& v);
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "archetypes.hpp"
using std::optional;
int main()
{
{
typedef int T;
constexpr T t(5);
constexpr optional<T> opt(t);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == 5, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
{
typedef double T;
constexpr T t(3);
constexpr optional<T> opt(t);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(*opt == 3, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
{
const int x = 42;
optional<const int> o(x);
assert(*o == x);
}
{
typedef TestTypes::TestType T;
T::reset();
const T t(3);
optional<T> opt = t;
assert(T::alive == 2);
assert(T::copy_constructed == 1);
assert(static_cast<bool>(opt) == true);
assert(opt.value().value == 3);
}
{
typedef ExplicitTestTypes::TestType T;
static_assert(!std::is_convertible<T const&, optional<T>>::value, "");
T::reset();
const T t(3);
optional<T> opt(t);
assert(T::alive == 2);
assert(T::copy_constructed == 1);
assert(static_cast<bool>(opt) == true);
assert(opt.value().value == 3);
}
{
typedef ConstexprTestTypes::TestType T;
constexpr T t(3);
constexpr optional<T> opt = {t};
static_assert(static_cast<bool>(opt) == true, "");
static_assert(opt.value().value == 3, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
{
typedef ExplicitConstexprTestTypes::TestType T;
static_assert(!std::is_convertible<const T&, optional<T>>::value, "");
constexpr T t(3);
constexpr optional<T> opt(t);
static_assert(static_cast<bool>(opt) == true, "");
static_assert(opt.value().value == 3, "");
struct test_constexpr_ctor
: public optional<T>
{
constexpr test_constexpr_ctor(const T&) {}
};
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
struct Z {
Z(int) {}
Z(const Z&) {throw 6;}
};
typedef Z T;
try
{
const T t(3);
optional<T> opt(t);
assert(false);
}
catch (int i)
{
assert(i == 6);
}
}
#endif
}
|
