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 // union 13 14 #include <type_traits> 15 16 template <class T> 17 void test_union_imp() 18 { 19 static_assert(!std::is_reference<T>::value, ""); 20 static_assert(!std::is_arithmetic<T>::value, ""); 21 static_assert(!std::is_fundamental<T>::value, ""); 22 static_assert( std::is_object<T>::value, ""); 23 static_assert(!std::is_scalar<T>::value, ""); 24 static_assert( std::is_compound<T>::value, ""); 25 static_assert(!std::is_member_pointer<T>::value, ""); 26 } 27 28 template <class T> 29 void test_union() 30 { 31 test_union_imp<T>(); 32 test_union_imp<const T>(); 33 test_union_imp<volatile T>(); 34 test_union_imp<const volatile T>(); 35 } 36 37 union Union 38 { 39 int _; 40 double __; 41 }; 42 43 int main() 44 { 45 test_union<Union>(); 46 } 47
