| //===----------------------------------------------------------------------===// |
| // |
| // 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 <type_traits> |
| #include "test_macros.h" |
| |
| template <class T> |
| void test_is_default_constructible() |
| { |
| static_assert( std::is_default_constructible<T>::value, ""); |
| static_assert( std::is_default_constructible<const T>::value, ""); |
| static_assert( std::is_default_constructible<volatile T>::value, ""); |
| static_assert( std::is_default_constructible<const volatile T>::value, ""); |
| #if TEST_STD_VER > 14 |
| static_assert( std::is_default_constructible_v<T>, ""); |
| static_assert( std::is_default_constructible_v<const T>, ""); |
| static_assert( std::is_default_constructible_v<volatile T>, ""); |
| static_assert( std::is_default_constructible_v<const volatile T>, ""); |
| #endif |
| } |
| |
| template <class T> |
| void test_is_not_default_constructible() |
| { |
| static_assert(!std::is_default_constructible<T>::value, ""); |
| static_assert(!std::is_default_constructible<const T>::value, ""); |
| static_assert(!std::is_default_constructible<volatile T>::value, ""); |
| static_assert(!std::is_default_constructible<const volatile T>::value, ""); |
| #if TEST_STD_VER > 14 |
| static_assert(!std::is_default_constructible_v<T>, ""); |
| static_assert(!std::is_default_constructible_v<const T>, ""); |
| static_assert(!std::is_default_constructible_v<volatile T>, ""); |
| static_assert(!std::is_default_constructible_v<const volatile T>, ""); |
| #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<A>(); |
| test_is_default_constructible<Union>(); |
| test_is_default_constructible<Empty>(); |
| test_is_default_constructible<int>(); |
| test_is_default_constructible<double>(); |
| test_is_default_constructible<int*>(); |
| test_is_default_constructible<const int*>(); |
| test_is_default_constructible<char[3]>(); |
| test_is_default_constructible<char[5][3]>(); |
| |
| test_is_default_constructible<NotEmpty>(); |
| test_is_default_constructible<bit_zero>(); |
| |
| test_is_not_default_constructible<void>(); |
| test_is_not_default_constructible<int&>(); |
| test_is_not_default_constructible<char[]>(); |
| test_is_not_default_constructible<char[][3]>(); |
| |
| test_is_not_default_constructible<Abstract>(); |
| test_is_not_default_constructible<NoDefaultConstructor>(); |
| #if TEST_STD_VER >= 11 |
| test_is_not_default_constructible<B>(); |
| test_is_not_default_constructible<int&&>(); |
| |
| // 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<void()>(); |
| test_is_not_default_constructible<void() const> (); |
| test_is_not_default_constructible<void() volatile> (); |
| test_is_not_default_constructible<void() &> (); |
| test_is_not_default_constructible<void() &&> (); |
| #endif |
| #endif |
| } |