1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14
10 // <optional>
11
12 // ~optional();
13
14 #include <optional>
15 #include <type_traits>
16 #include <cassert>
17
18 #include "test_macros.h"
19
20 using std::optional;
21
22 struct PODType {
23 int value;
24 int value2;
25 };
26
27 class X
28 {
29 public:
30 static bool dtor_called;
31 X() = default;
32 X(const X&) = default;
33 X& operator=(const X&) = default;
~X()34 ~X() {dtor_called = true;}
35 };
36
37 bool X::dtor_called = false;
38
main(int,char **)39 int main(int, char**)
40 {
41 {
42 typedef int T;
43 static_assert(std::is_trivially_destructible<T>::value, "");
44 static_assert(std::is_trivially_destructible<optional<T>>::value, "");
45 }
46 {
47 typedef double T;
48 static_assert(std::is_trivially_destructible<T>::value, "");
49 static_assert(std::is_trivially_destructible<optional<T>>::value, "");
50 }
51 {
52 typedef PODType T;
53 static_assert(std::is_trivially_destructible<T>::value, "");
54 static_assert(std::is_trivially_destructible<optional<T>>::value, "");
55 }
56 {
57 typedef X T;
58 static_assert(!std::is_trivially_destructible<T>::value, "");
59 static_assert(!std::is_trivially_destructible<optional<T>>::value, "");
60 {
61 X x;
62 optional<X> opt{x};
63 assert(X::dtor_called == false);
64 }
65 assert(X::dtor_called == true);
66 }
67
68 return 0;
69 }
70