libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/has_virtual_destructor.pass.cpp

   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 // type_traits
  10
  11 // has_virtual_destructor
  12
  13 #include <type_traits>
  14
  15 #include "test_macros.h"
  16
  17 template <class T>
  18 void test_has_virtual_destructor()
  19 {
  20     static_assert( std::has_virtual_destructor<T>::value, "");
  21     static_assert( std::has_virtual_destructor<const T>::value, "");
  22     static_assert( std::has_virtual_destructor<volatile T>::value, "");
  23     static_assert( std::has_virtual_destructor<const volatile T>::value, "");
  24 #if TEST_STD_VER > 14
  25     static_assert( std::has_virtual_destructor_v<T>, "");
  26     static_assert( std::has_virtual_destructor_v<const T>, "");
  27     static_assert( std::has_virtual_destructor_v<volatile T>, "");
  28     static_assert( std::has_virtual_destructor_v<const volatile T>, "");
  29 #endif
  30 }
  31
  32 template <class T>
  33 void test_has_not_virtual_destructor()
  34 {
  35     static_assert(!std::has_virtual_destructor<T>::value, "");
  36     static_assert(!std::has_virtual_destructor<const T>::value, "");
  37     static_assert(!std::has_virtual_destructor<volatile T>::value, "");
  38     static_assert(!std::has_virtual_destructor<const volatile T>::value, "");
  39 #if TEST_STD_VER > 14
  40     static_assert(!std::has_virtual_destructor_v<T>, "");
  41     static_assert(!std::has_virtual_destructor_v<const T>, "");
  42     static_assert(!std::has_virtual_destructor_v<volatile T>, "");
  43     static_assert(!std::has_virtual_destructor_v<const volatile T>, "");
  44 #endif
  45 }
  46
  47 class Empty
  48 {
  49 };
  50
  51 class NotEmpty
  52 {
  53     virtual ~NotEmpty();
  54 };
  55
  56 union Union {};
  57
  58 struct bit_zero
  59 {
  60     int :  0;
  61 };
  62
  63 class Abstract
  64 {
  65     virtual ~Abstract() = 0;
  66 };
  67
  68 struct A
  69 {
  70     ~A();
  71 };
  72
  73 int main(int, char**)
  74 {
  75     test_has_not_virtual_destructor<void>();
  76     test_has_not_virtual_destructor<A>();
  77     test_has_not_virtual_destructor<int&>();
  78     test_has_not_virtual_destructor<Union>();
  79     test_has_not_virtual_destructor<Empty>();
  80     test_has_not_virtual_destructor<int>();
  81     test_has_not_virtual_destructor<double>();
  82     test_has_not_virtual_destructor<int*>();
  83     test_has_not_virtual_destructor<const int*>();
  84     test_has_not_virtual_destructor<char[3]>();
  85     test_has_not_virtual_destructor<char[]>();
  86     test_has_not_virtual_destructor<bit_zero>();
  87
  88     test_has_virtual_destructor<Abstract>();
  89     test_has_virtual_destructor<NotEmpty>();
  90
  91   return 0;
  92 }