libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_polymorphic.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_polymorphic
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_is_polymorphic()
  18 {
  19     static_assert( std::is_polymorphic<T>::value, "");
  20     static_assert( std::is_polymorphic<const T>::value, "");
  21     static_assert( std::is_polymorphic<volatile T>::value, "");
  22     static_assert( std::is_polymorphic<const volatile T>::value, "");
  23 #if TEST_STD_VER > 14
  24     static_assert( std::is_polymorphic_v<T>, "");
  25     static_assert( std::is_polymorphic_v<const T>, "");
  26     static_assert( std::is_polymorphic_v<volatile T>, "");
  27     static_assert( std::is_polymorphic_v<const volatile T>, "");
  28 #endif
  29 }
  30
  31 template <class T>
  32 void test_is_not_polymorphic()
  33 {
  34     static_assert(!std::is_polymorphic<T>::value, "");
  35     static_assert(!std::is_polymorphic<const T>::value, "");
  36     static_assert(!std::is_polymorphic<volatile T>::value, "");
  37     static_assert(!std::is_polymorphic<const volatile T>::value, "");
  38 #if TEST_STD_VER > 14
  39     static_assert(!std::is_polymorphic_v<T>, "");
  40     static_assert(!std::is_polymorphic_v<const T>, "");
  41     static_assert(!std::is_polymorphic_v<volatile T>, "");
  42     static_assert(!std::is_polymorphic_v<const volatile T>, "");
  43 #endif
  44 }
  45
  46 class Empty
  47 {
  48 };
  49
  50 class NotEmpty
  51 {
  52     virtual ~NotEmpty();
  53 };
  54
  55 union Union {};
  56
  57 struct bit_zero
  58 {
  59     int :  0;
  60 };
  61
  62 class Abstract
  63 {
  64     virtual ~Abstract() = 0;
  65 };
  66
  67 #if TEST_STD_VER >= 11
  68 class Final final {
  69 };
  70 #else
  71 class Final {
  72 };
  73 #endif
  74
  75 int main(int, char**)
  76 {
  77     test_is_not_polymorphic<void>();
  78     test_is_not_polymorphic<int&>();
  79     test_is_not_polymorphic<int>();
  80     test_is_not_polymorphic<double>();
  81     test_is_not_polymorphic<int*>();
  82     test_is_not_polymorphic<const int*>();
  83     test_is_not_polymorphic<char[3]>();
  84     test_is_not_polymorphic<char[]>();
  85     test_is_not_polymorphic<Union>();
  86     test_is_not_polymorphic<Empty>();
  87     test_is_not_polymorphic<bit_zero>();
  88     test_is_not_polymorphic<Final>();
  89     test_is_not_polymorphic<NotEmpty&>();
  90     test_is_not_polymorphic<Abstract&>();
  91
  92     test_is_polymorphic<NotEmpty>();
  93     test_is_polymorphic<Abstract>();
  94
  95   return 0;
  96 }