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1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // type_traits
11 
12 // is_trivially_destructible
13 
14 // Prevent warning when testing the Abstract test type.
15 #if defined(__clang__)
16 #pragma clang diagnostic ignored "-Wdelete-non-virtual-dtor"
17 #endif
18 
19 #include <type_traits>
20 #include "test_macros.h"
21 
22 template <class T>
test_is_trivially_destructible()23 void test_is_trivially_destructible()
24 {
25     static_assert( std::is_trivially_destructible<T>::value, "");
26     static_assert( std::is_trivially_destructible<const T>::value, "");
27     static_assert( std::is_trivially_destructible<volatile T>::value, "");
28     static_assert( std::is_trivially_destructible<const volatile T>::value, "");
29 #if TEST_STD_VER > 14
30     static_assert( std::is_trivially_destructible_v<T>, "");
31     static_assert( std::is_trivially_destructible_v<const T>, "");
32     static_assert( std::is_trivially_destructible_v<volatile T>, "");
33     static_assert( std::is_trivially_destructible_v<const volatile T>, "");
34 #endif
35 }
36 
37 template <class T>
test_is_not_trivially_destructible()38 void test_is_not_trivially_destructible()
39 {
40     static_assert(!std::is_trivially_destructible<T>::value, "");
41     static_assert(!std::is_trivially_destructible<const T>::value, "");
42     static_assert(!std::is_trivially_destructible<volatile T>::value, "");
43     static_assert(!std::is_trivially_destructible<const volatile T>::value, "");
44 #if TEST_STD_VER > 14
45     static_assert(!std::is_trivially_destructible_v<T>, "");
46     static_assert(!std::is_trivially_destructible_v<const T>, "");
47     static_assert(!std::is_trivially_destructible_v<volatile T>, "");
48     static_assert(!std::is_trivially_destructible_v<const volatile T>, "");
49 #endif
50 }
51 
~PublicDestructorPublicDestructor52 struct PublicDestructor           { public:     ~PublicDestructor() {}};
~ProtectedDestructorProtectedDestructor53 struct ProtectedDestructor        { protected:  ~ProtectedDestructor() {}};
~PrivateDestructorPrivateDestructor54 struct PrivateDestructor          { private:    ~PrivateDestructor() {}};
55 
~VirtualPublicDestructorVirtualPublicDestructor56 struct VirtualPublicDestructor           { public:    virtual ~VirtualPublicDestructor() {}};
~VirtualProtectedDestructorVirtualProtectedDestructor57 struct VirtualProtectedDestructor        { protected: virtual ~VirtualProtectedDestructor() {}};
~VirtualPrivateDestructorVirtualPrivateDestructor58 struct VirtualPrivateDestructor          { private:   virtual ~VirtualPrivateDestructor() {}};
59 
60 struct PurePublicDestructor              { public:    virtual ~PurePublicDestructor() = 0; };
61 struct PureProtectedDestructor           { protected: virtual ~PureProtectedDestructor() = 0; };
62 struct PurePrivateDestructor             { private:   virtual ~PurePrivateDestructor() = 0; };
63 
64 
65 class Empty
66 {
67 };
68 
69 union Union {};
70 
71 struct bit_zero
72 {
73     int :  0;
74 };
75 
76 class Abstract
77 {
78     virtual void foo() = 0;
79 };
80 
81 class AbstractDestructor
82 {
83     virtual ~AbstractDestructor() = 0;
84 };
85 
86 struct A
87 {
88     ~A();
89 };
90 
main()91 int main()
92 {
93     test_is_not_trivially_destructible<void>();
94     test_is_not_trivially_destructible<A>();
95     test_is_not_trivially_destructible<char[]>();
96     test_is_not_trivially_destructible<VirtualPublicDestructor>();
97     test_is_not_trivially_destructible<PurePublicDestructor>();
98 
99     test_is_trivially_destructible<Abstract>();
100     test_is_trivially_destructible<Union>();
101     test_is_trivially_destructible<Empty>();
102     test_is_trivially_destructible<int&>();
103     test_is_trivially_destructible<int>();
104     test_is_trivially_destructible<double>();
105     test_is_trivially_destructible<int*>();
106     test_is_trivially_destructible<const int*>();
107     test_is_trivially_destructible<char[3]>();
108     test_is_trivially_destructible<bit_zero>();
109 
110 #if TEST_STD_VER >= 11
111     // requires access control sfinae
112     test_is_not_trivially_destructible<ProtectedDestructor>();
113     test_is_not_trivially_destructible<PrivateDestructor>();
114     test_is_not_trivially_destructible<VirtualProtectedDestructor>();
115     test_is_not_trivially_destructible<VirtualPrivateDestructor>();
116     test_is_not_trivially_destructible<PureProtectedDestructor>();
117     test_is_not_trivially_destructible<PurePrivateDestructor>();
118 #endif
119 }
120