| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <memory> |
| |
| // unique_ptr |
| |
| // Test unique_ptr converting move assignment |
| |
| #include <memory> |
| #include <utility> |
| #include <cassert> |
| |
| #include "unique_ptr_test_helper.h" |
| |
| template <class APtr, class BPtr> |
| void testAssign(APtr& aptr, BPtr& bptr) { |
| A* p = bptr.get(); |
| assert(A::count == 2); |
| aptr = std::move(bptr); |
| assert(aptr.get() == p); |
| assert(bptr.get() == 0); |
| assert(A::count == 1); |
| assert(B::count == 1); |
| } |
| |
| template <class LHS, class RHS> |
| void checkDeleter(LHS& lhs, RHS& rhs, int LHSState, int RHSState) { |
| assert(lhs.get_deleter().state() == LHSState); |
| assert(rhs.get_deleter().state() == RHSState); |
| } |
| |
| template <class T> |
| struct NCConvertingDeleter { |
| NCConvertingDeleter() = default; |
| NCConvertingDeleter(NCConvertingDeleter const&) = delete; |
| NCConvertingDeleter(NCConvertingDeleter&&) = default; |
| |
| template <class U> |
| NCConvertingDeleter(NCConvertingDeleter<U>&&) {} |
| |
| void operator()(T*) const {} |
| }; |
| |
| template <class T> |
| struct NCConvertingDeleter<T[]> { |
| NCConvertingDeleter() = default; |
| NCConvertingDeleter(NCConvertingDeleter const&) = delete; |
| NCConvertingDeleter(NCConvertingDeleter&&) = default; |
| |
| template <class U> |
| NCConvertingDeleter(NCConvertingDeleter<U>&&) {} |
| |
| void operator()(T*) const {} |
| }; |
| |
| struct GenericDeleter { |
| void operator()(void*) const; |
| }; |
| |
| struct NCGenericDeleter { |
| NCGenericDeleter() = default; |
| NCGenericDeleter(NCGenericDeleter const&) = delete; |
| NCGenericDeleter(NCGenericDeleter&&) = default; |
| |
| void operator()(void*) const {} |
| }; |
| |
| void test_sfinae() { |
| using DA = NCConvertingDeleter<A[]>; // non-copyable deleters |
| using DAC = NCConvertingDeleter<const A[]>; // non-copyable deleters |
| |
| using UA = std::unique_ptr<A[]>; |
| using UAC = std::unique_ptr<const A[]>; |
| using UAD = std::unique_ptr<A[], DA>; |
| using UACD = std::unique_ptr<const A[], DAC>; |
| |
| { // cannot move from an lvalue |
| static_assert(std::is_assignable<UAC, UA&&>::value, ""); |
| static_assert(!std::is_assignable<UAC, UA&>::value, ""); |
| static_assert(!std::is_assignable<UAC, const UA&>::value, ""); |
| } |
| { // cannot move if the deleter-types cannot convert |
| static_assert(std::is_assignable<UACD, UAD&&>::value, ""); |
| static_assert(!std::is_assignable<UACD, UAC&&>::value, ""); |
| static_assert(!std::is_assignable<UAC, UACD&&>::value, ""); |
| } |
| { // cannot move-convert with reference deleters of different types |
| using UA1 = std::unique_ptr<A[], DA&>; |
| using UA2 = std::unique_ptr<A[], DAC&>; |
| static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); |
| } |
| { // cannot move-convert with reference deleters of different types |
| using UA1 = std::unique_ptr<A[], const DA&>; |
| using UA2 = std::unique_ptr<A[], const DAC&>; |
| static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); |
| } |
| { // cannot move-convert from unique_ptr<Single> |
| using UA1 = std::unique_ptr<A[]>; |
| using UA2 = std::unique_ptr<A>; |
| static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); |
| } |
| { // cannot move-convert from unique_ptr<Array[]> |
| using UA1 = std::unique_ptr<A[], NCGenericDeleter>; |
| using UA2 = std::unique_ptr<A, NCGenericDeleter>; |
| static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); |
| } |
| } |
| |
| int main() { |
| test_sfinae(); |
| // FIXME: add tests |
| } |