| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <memory> |
| |
| // unique_ptr |
| |
| // Test unique_ptr converting move assignment |
| |
| #include <memory> |
| #include <utility> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "deleter_types.h" |
| #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 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 DB = NCConvertingDeleter<B>; |
| using UA = std::unique_ptr<A>; |
| using UB = std::unique_ptr<B>; |
| using UAD = std::unique_ptr<A, DA>; |
| using UBD = std::unique_ptr<B, DB>; |
| { // cannot move from an lvalue |
| static_assert(std::is_assignable<UA, UB&&>::value, ""); |
| static_assert(!std::is_assignable<UA, UB&>::value, ""); |
| static_assert(!std::is_assignable<UA, const UB&>::value, ""); |
| } |
| { // cannot move if the deleter-types cannot convert |
| static_assert(std::is_assignable<UAD, UBD&&>::value, ""); |
| static_assert(!std::is_assignable<UAD, UB&&>::value, ""); |
| static_assert(!std::is_assignable<UA, UBD&&>::value, ""); |
| } |
| { // cannot move-convert with reference deleters of different types |
| using UA1 = std::unique_ptr<A, DA&>; |
| using UB1 = std::unique_ptr<B, DB&>; |
| static_assert(!std::is_assignable<UA1, UB1&&>::value, ""); |
| } |
| { // cannot move-convert with reference deleters of different types |
| using UA1 = std::unique_ptr<A, const DA&>; |
| using UB1 = std::unique_ptr<B, const DB&>; |
| static_assert(!std::is_assignable<UA1, UB1&&>::value, ""); |
| } |
| { // cannot move-convert from unique_ptr<Array[]> |
| using UA1 = std::unique_ptr<A>; |
| using UA2 = std::unique_ptr<A[]>; |
| using UB1 = std::unique_ptr<B[]>; |
| static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); |
| static_assert(!std::is_assignable<UA1, UB1&&>::value, ""); |
| } |
| { // cannot move-convert from unique_ptr<Array[]> |
| using UA1 = std::unique_ptr<A, NCGenericDeleter>; |
| using UA2 = std::unique_ptr<A[], NCGenericDeleter>; |
| using UB1 = std::unique_ptr<B[], NCGenericDeleter>; |
| static_assert(!std::is_assignable<UA1, UA2&&>::value, ""); |
| static_assert(!std::is_assignable<UA1, UB1&&>::value, ""); |
| } |
| } |
| |
| int main(int, char**) { |
| test_sfinae(); |
| { |
| std::unique_ptr<B> bptr(new B); |
| std::unique_ptr<A> aptr(new A); |
| testAssign(aptr, bptr); |
| } |
| assert(A::count == 0); |
| assert(B::count == 0); |
| { |
| Deleter<B> del(42); |
| std::unique_ptr<B, Deleter<B> > bptr(new B, std::move(del)); |
| std::unique_ptr<A, Deleter<A> > aptr(new A); |
| testAssign(aptr, bptr); |
| checkDeleter(aptr, bptr, 42, 0); |
| } |
| assert(A::count == 0); |
| assert(B::count == 0); |
| { |
| CDeleter<A> adel(6); |
| CDeleter<B> bdel(42); |
| std::unique_ptr<B, CDeleter<B>&> bptr(new B, bdel); |
| std::unique_ptr<A, CDeleter<A>&> aptr(new A, adel); |
| testAssign(aptr, bptr); |
| checkDeleter(aptr, bptr, 42, 42); |
| } |
| assert(A::count == 0); |
| assert(B::count == 0); |
| |
| return 0; |
| } |