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_standard_layout 13 14 #include <type_traits> 15 #include "test_macros.h" 16 17 template <class T> 18 void test_is_standard_layout() 19 { 20 static_assert( std::is_standard_layout<T>::value, ""); 21 static_assert( std::is_standard_layout<const T>::value, ""); 22 static_assert( std::is_standard_layout<volatile T>::value, ""); 23 static_assert( std::is_standard_layout<const volatile T>::value, ""); 24 #if TEST_STD_VER > 14 25 static_assert( std::is_standard_layout_v<T>, ""); 26 static_assert( std::is_standard_layout_v<const T>, ""); 27 static_assert( std::is_standard_layout_v<volatile T>, ""); 28 static_assert( std::is_standard_layout_v<const volatile T>, ""); 29 #endif 30 } 31 32 template <class T> 33 void test_is_not_standard_layout() 34 { 35 static_assert(!std::is_standard_layout<T>::value, ""); 36 static_assert(!std::is_standard_layout<const T>::value, ""); 37 static_assert(!std::is_standard_layout<volatile T>::value, ""); 38 static_assert(!std::is_standard_layout<const volatile T>::value, ""); 39 #if TEST_STD_VER > 14 40 static_assert(!std::is_standard_layout_v<T>, ""); 41 static_assert(!std::is_standard_layout_v<const T>, ""); 42 static_assert(!std::is_standard_layout_v<volatile T>, ""); 43 static_assert(!std::is_standard_layout_v<const volatile T>, ""); 44 #endif 45 } 46 47 template <class T1, class T2> 48 struct pair 49 { 50 T1 first; 51 T2 second; 52 }; 53 54 int main() 55 { 56 test_is_standard_layout<int> (); 57 test_is_standard_layout<int[3]> (); 58 test_is_standard_layout<pair<int, double> > (); 59 60 test_is_not_standard_layout<int&> (); 61 } 62
