aboutsummaryrefslogtreecommitdiffstats
path: root/test/libcxx/utilities/optional/optional.object/special_member_gen.pass.cpp
blob: 9493d6bb766cf2fcf3cf2692bb4f0e74a7ad312d (plain) (blame)
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
//===----------------------------------------------------------------------===//
//
//                     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
// <optional>


#include <optional>
#include <type_traits>
#include <cassert>

#include "archetypes.hpp"

template <class T>
struct SpecialMemberTest {
    using O = std::optional<T>;

    template <template <class> class TestMF>
    static constexpr bool check_same() {
        return TestMF<O>::value == TestMF<T>::value;
    }

    // Test that optional inherits the correct trivial/non-trivial members
    static_assert(check_same<std::is_trivially_destructible>(), "");
    static_assert(check_same<std::is_trivially_copyable>(), "");
};

template <class ...Args> static void sink(Args&&...) {}

template <class ...TestTypes>
struct DoTestsMetafunction {
    DoTestsMetafunction() { sink(SpecialMemberTest<TestTypes>{}...); }
};

struct TrivialMoveNonTrivialCopy {
    TrivialMoveNonTrivialCopy() = default;
    TrivialMoveNonTrivialCopy(const TrivialMoveNonTrivialCopy&) {}
    TrivialMoveNonTrivialCopy(TrivialMoveNonTrivialCopy&&) = default;
    TrivialMoveNonTrivialCopy& operator=(const TrivialMoveNonTrivialCopy&) { return *this; }
    TrivialMoveNonTrivialCopy& operator=(TrivialMoveNonTrivialCopy&&) = default;
};

struct TrivialCopyNonTrivialMove {
    TrivialCopyNonTrivialMove() = default;
    TrivialCopyNonTrivialMove(const TrivialCopyNonTrivialMove&) = default;
    TrivialCopyNonTrivialMove(TrivialCopyNonTrivialMove&&) {}
    TrivialCopyNonTrivialMove& operator=(const TrivialCopyNonTrivialMove&) = default;
    TrivialCopyNonTrivialMove& operator=(TrivialCopyNonTrivialMove&&) { return *this; }
};

int main()
{
    sink(
        ImplicitTypes::ApplyTypes<DoTestsMetafunction>{},
        ExplicitTypes::ApplyTypes<DoTestsMetafunction>{},
        NonLiteralTypes::ApplyTypes<DoTestsMetafunction>{},
        NonTrivialTypes::ApplyTypes<DoTestsMetafunction>{},
        DoTestsMetafunction<TrivialMoveNonTrivialCopy, TrivialCopyNonTrivialMove>{}
    );
}