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