63 lines · 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-exception6//7//===----------------------------------------------------------------------===//8 9// type_traits10 11// is_standard_layout12 13#include <type_traits>14#include "test_macros.h"15 16template <class T>17void test_is_standard_layout()18{19 static_assert( std::is_standard_layout<T>::value, "");20 static_assert( std::is_standard_layout<const T>::value, "");21 static_assert( std::is_standard_layout<volatile T>::value, "");22 static_assert( std::is_standard_layout<const volatile T>::value, "");23#if TEST_STD_VER > 1424 static_assert( std::is_standard_layout_v<T>, "");25 static_assert( std::is_standard_layout_v<const T>, "");26 static_assert( std::is_standard_layout_v<volatile T>, "");27 static_assert( std::is_standard_layout_v<const volatile T>, "");28#endif29}30 31template <class T>32void test_is_not_standard_layout()33{34 static_assert(!std::is_standard_layout<T>::value, "");35 static_assert(!std::is_standard_layout<const T>::value, "");36 static_assert(!std::is_standard_layout<volatile T>::value, "");37 static_assert(!std::is_standard_layout<const volatile T>::value, "");38#if TEST_STD_VER > 1439 static_assert(!std::is_standard_layout_v<T>, "");40 static_assert(!std::is_standard_layout_v<const T>, "");41 static_assert(!std::is_standard_layout_v<volatile T>, "");42 static_assert(!std::is_standard_layout_v<const volatile T>, "");43#endif44}45 46template <class T1, class T2>47struct pair48{49 T1 first;50 T2 second;51};52 53int main(int, char**)54{55 test_is_standard_layout<int> ();56 test_is_standard_layout<int[3]> ();57 test_is_standard_layout<pair<int, double> > ();58 59 test_is_not_standard_layout<int&> ();60 61 return 0;62}63