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;
~X()32 ~X() {dtor_called = true;}
33 };
34
35 bool X::dtor_called = false;
36
main(int,char **)37 int main(int, char**)
38 {
39 {
40 typedef int T;
41 static_assert(std::is_trivially_destructible<T>::value, "");
42 static_assert(std::is_trivially_destructible<optional<T>>::value, "");
43 }
44 {
45 typedef double T;
46 static_assert(std::is_trivially_destructible<T>::value, "");
47 static_assert(std::is_trivially_destructible<optional<T>>::value, "");
48 }
49 {
50 typedef PODType T;
51 static_assert(std::is_trivially_destructible<T>::value, "");
52 static_assert(std::is_trivially_destructible<optional<T>>::value, "");
53 }
54 {
55 typedef X T;
56 static_assert(!std::is_trivially_destructible<T>::value, "");
57 static_assert(!std::is_trivially_destructible<optional<T>>::value, "");
58 {
59 X x;
60 optional<X> opt{x};
61 assert(X::dtor_called == false);
62 }
63 assert(X::dtor_called == true);
64 }
65
66 return 0;
67 }
68