| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <iterator> |
| |
| // move_iterator |
| |
| // template <class U> |
| // requires HasConstructor<Iter, const U&> |
| // move_iterator(const move_iterator<U> &u); |
| // |
| // constexpr in C++17 |
| |
| #include <iterator> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| template <class It, class U> |
| void |
| test(U u) |
| { |
| const std::move_iterator<U> r2(u); |
| std::move_iterator<It> r1 = r2; |
| assert(r1.base() == u); |
| } |
| |
| struct Base {}; |
| struct Derived : Base {}; |
| |
| int main() |
| { |
| Derived d; |
| |
| test<input_iterator<Base*> >(input_iterator<Derived*>(&d)); |
| test<forward_iterator<Base*> >(forward_iterator<Derived*>(&d)); |
| test<bidirectional_iterator<Base*> >(bidirectional_iterator<Derived*>(&d)); |
| test<random_access_iterator<const Base*> >(random_access_iterator<Derived*>(&d)); |
| test<Base*>(&d); |
| |
| #if TEST_STD_VER > 14 |
| { |
| constexpr const Derived *p = nullptr; |
| constexpr std::move_iterator<const Derived *> it1 = std::make_move_iterator(p); |
| constexpr std::move_iterator<const Base *> it2(it1); |
| static_assert(it2.base() == p); |
| } |
| #endif |
| } |