| //===----------------------------------------------------------------------===// |
| // |
| // 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> |
| |
| template <class T, bool Result> |
| void test_is_default_constructible() |
| { |
| static_assert(std::is_default_constructible<T>::value == Result, ""); |
| static_assert(std::is_default_constructible<const T>::value == Result, ""); |
| static_assert(std::is_default_constructible<volatile T>::value == Result, ""); |
| static_assert(std::is_default_constructible<const volatile T>::value == Result, ""); |
| } |
| |
| class Empty |
| { |
| }; |
| |
| 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<void, false>(); |
| test_is_default_constructible<int&, false>(); |
| test_is_default_constructible<char[], false>(); |
| test_is_default_constructible<Abstract, false>(); |
| |
| test_is_default_constructible<A, true>(); |
| test_is_default_constructible<B, false>(); |
| test_is_default_constructible<Union, true>(); |
| test_is_default_constructible<Empty, true>(); |
| test_is_default_constructible<int, true>(); |
| test_is_default_constructible<double, true>(); |
| test_is_default_constructible<int*, true>(); |
| test_is_default_constructible<const int*, true>(); |
| test_is_default_constructible<char[3], true>(); |
| test_is_default_constructible<NotEmpty, true>(); |
| test_is_default_constructible<bit_zero, true>(); |
| } |