//===----------------------------------------------------------------------===// // // The LLVM Compiler Infrastructure // // This file is dual licensed under the MIT and the University of Illinois Open // Source Licenses. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // type_traits // is_default_constructible #include #include "test_macros.h" template void test_is_default_constructible() { static_assert( std::is_default_constructible::value, ""); static_assert( std::is_default_constructible::value, ""); static_assert( std::is_default_constructible::value, ""); static_assert( std::is_default_constructible::value, ""); #if TEST_STD_VER > 14 static_assert( std::is_default_constructible_v, ""); static_assert( std::is_default_constructible_v, ""); static_assert( std::is_default_constructible_v, ""); static_assert( std::is_default_constructible_v, ""); #endif } template void test_is_not_default_constructible() { static_assert(!std::is_default_constructible::value, ""); static_assert(!std::is_default_constructible::value, ""); static_assert(!std::is_default_constructible::value, ""); static_assert(!std::is_default_constructible::value, ""); #if TEST_STD_VER > 14 static_assert(!std::is_default_constructible_v, ""); static_assert(!std::is_default_constructible_v, ""); static_assert(!std::is_default_constructible_v, ""); static_assert(!std::is_default_constructible_v, ""); #endif } class Empty { }; class NoDefaultConstructor { NoDefaultConstructor(int) {} }; class NotEmpty { public: virtual ~NotEmpty(); }; union Union {}; struct bit_zero { int : 0; }; class Abstract { public: virtual ~Abstract() = 0; }; struct A { A(); }; class B { B(); }; int main() { test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_default_constructible(); test_is_not_default_constructible(); test_is_not_default_constructible(); test_is_not_default_constructible(); test_is_not_default_constructible(); test_is_not_default_constructible(); test_is_not_default_constructible(); #if TEST_STD_VER >= 11 test_is_not_default_constructible(); test_is_not_default_constructible(); // TODO: Remove this workaround once Clang <= 3.7 are no longer used regularly. // In those compiler versions the __is_constructible builtin gives the wrong // results for abominable function types. #if (defined(TEST_APPLE_CLANG_VER) && TEST_APPLE_CLANG_VER < 703) \ || (defined(TEST_CLANG_VER) && TEST_CLANG_VER < 308) #define WORKAROUND_CLANG_BUG #endif #if !defined(WORKAROUND_CLANG_BUG) test_is_not_default_constructible(); test_is_not_default_constructible (); test_is_not_default_constructible (); test_is_not_default_constructible (); test_is_not_default_constructible (); #endif #endif }