libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_nothrow_destructible.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 // is_nothrow_destructible
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_is_nothrow_destructible()
  18 {
  19     static_assert( std::is_nothrow_destructible<T>::value, "");
  20     static_assert( std::is_nothrow_destructible<const T>::value, "");
  21     static_assert( std::is_nothrow_destructible<volatile T>::value, "");
  22     static_assert( std::is_nothrow_destructible<const volatile T>::value, "");
  23 #if TEST_STD_VER > 14
  24     static_assert( std::is_nothrow_destructible_v<T>, "");
  25     static_assert( std::is_nothrow_destructible_v<const T>, "");
  26     static_assert( std::is_nothrow_destructible_v<volatile T>, "");
  27     static_assert( std::is_nothrow_destructible_v<const volatile T>, "");
  28 #endif
  29 }
  30
  31 template <class T>
  32 void test_is_not_nothrow_destructible()
  33 {
  34     static_assert(!std::is_nothrow_destructible<T>::value, "");
  35     static_assert(!std::is_nothrow_destructible<const T>::value, "");
  36     static_assert(!std::is_nothrow_destructible<volatile T>::value, "");
  37     static_assert(!std::is_nothrow_destructible<const volatile T>::value, "");
  38 #if TEST_STD_VER > 14
  39     static_assert(!std::is_nothrow_destructible_v<T>, "");
  40     static_assert(!std::is_nothrow_destructible_v<const T>, "");
  41     static_assert(!std::is_nothrow_destructible_v<volatile T>, "");
  42     static_assert(!std::is_nothrow_destructible_v<const volatile T>, "");
  43 #endif
  44 }
  45
  46
  47 struct PublicDestructor           { public:     ~PublicDestructor() {}};
  48 struct ProtectedDestructor        { protected:  ~ProtectedDestructor() {}};
  49 struct PrivateDestructor          { private:    ~PrivateDestructor() {}};
  50
  51 struct VirtualPublicDestructor           { public:    virtual ~VirtualPublicDestructor() {}};
  52 struct VirtualProtectedDestructor        { protected: virtual ~VirtualProtectedDestructor() {}};
  53 struct VirtualPrivateDestructor          { private:   virtual ~VirtualPrivateDestructor() {}};
  54
  55 struct PurePublicDestructor              { public:    virtual ~PurePublicDestructor() = 0; };
  56 struct PureProtectedDestructor           { protected: virtual ~PureProtectedDestructor() = 0; };
  57 struct PurePrivateDestructor             { private:   virtual ~PurePrivateDestructor() = 0; };
  58
  59 struct ExplicitlyNoThrowDestructor {
  60     ~ExplicitlyNoThrowDestructor() TEST_NOEXCEPT {}
  61 };
  62
  63 class Empty
  64 {
  65 };
  66
  67
  68 union Union {};
  69
  70 struct bit_zero
  71 {
  72     int :  0;
  73 };
  74
  75 class Abstract
  76 {
  77     virtual void foo() = 0;
  78 };
  79
  80
  81 int main(int, char**)
  82 {
  83     test_is_not_nothrow_destructible<void>();
  84     test_is_not_nothrow_destructible<char[]>();
  85     test_is_not_nothrow_destructible<char[][3]>();
  86
  87     test_is_nothrow_destructible<int&>();
  88     test_is_nothrow_destructible<int>();
  89     test_is_nothrow_destructible<double>();
  90     test_is_nothrow_destructible<int*>();
  91     test_is_nothrow_destructible<const int*>();
  92     test_is_nothrow_destructible<char[3]>();
  93
  94 #if TEST_STD_VER >= 11
  95     // requires noexcept. These are all destructible.
  96     test_is_nothrow_destructible<PublicDestructor>();
  97     test_is_nothrow_destructible<VirtualPublicDestructor>();
  98     test_is_nothrow_destructible<PurePublicDestructor>();
  99 #endif
 100     test_is_nothrow_destructible<ExplicitlyNoThrowDestructor>();
 101     test_is_nothrow_destructible<bit_zero>();
 102     test_is_nothrow_destructible<Abstract>();
 103     test_is_nothrow_destructible<Empty>();
 104     test_is_nothrow_destructible<Union>();
 105     // requires access control
 106     test_is_not_nothrow_destructible<ProtectedDestructor>();
 107     test_is_not_nothrow_destructible<PrivateDestructor>();
 108     test_is_not_nothrow_destructible<VirtualProtectedDestructor>();
 109     test_is_not_nothrow_destructible<VirtualPrivateDestructor>();
 110     test_is_not_nothrow_destructible<PureProtectedDestructor>();
 111     test_is_not_nothrow_destructible<PurePrivateDestructor>();
 112
 113
 114   return 0;
 115 }