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
|
//===----------------------------------------------------------------------===//
//
// 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>
// constexpr optional() noexcept;
#include <optional>
#include <type_traits>
#include <cassert>
#include "test_macros.h"
#include "archetypes.h"
using std::optional;
template <class Opt>
void
test_constexpr()
{
static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
static_assert(std::is_trivially_destructible<Opt>::value, "");
static_assert(std::is_trivially_destructible<typename Opt::value_type>::value, "");
constexpr Opt opt;
static_assert(static_cast<bool>(opt) == false, "");
struct test_constexpr_ctor
: public Opt
{
constexpr test_constexpr_ctor() {}
};
}
template <class Opt>
void
test()
{
static_assert(std::is_nothrow_default_constructible<Opt>::value, "");
static_assert(!std::is_trivially_destructible<Opt>::value, "");
static_assert(!std::is_trivially_destructible<typename Opt::value_type>::value, "");
{
Opt opt;
assert(static_cast<bool>(opt) == false);
}
{
const Opt opt;
assert(static_cast<bool>(opt) == false);
}
struct test_constexpr_ctor
: public Opt
{
constexpr test_constexpr_ctor() {}
};
}
int main(int, char**)
{
test_constexpr<optional<int>>();
test_constexpr<optional<int*>>();
test_constexpr<optional<ImplicitTypes::NoCtors>>();
test_constexpr<optional<NonTrivialTypes::NoCtors>>();
test_constexpr<optional<NonConstexprTypes::NoCtors>>();
test<optional<NonLiteralTypes::NoCtors>>();
// EXTENSIONS
#if defined(_LIBCPP_VERSION) && 0 // FIXME these extensions are currently disabled.
test_constexpr<optional<int&>>();
test_constexpr<optional<const int&>>();
test_constexpr<optional<int&>>();
test_constexpr<optional<NonLiteralTypes::NoCtors&>>();
test_constexpr<optional<NonLiteralTypes::NoCtors&&>>();
#endif
return 0;
}
|
