| //===----------------------------------------------------------------------===// |
| // |
| // 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. |
| // |
| |
| //===----------------------------------------------------------------------===// |
| |
| // <memory> |
| |
| // unique_ptr |
| |
| // Test unique_ptr converting move ctor |
| |
| // NOTE: unique_ptr does not provide converting constructors in C++03 |
| // UNSUPPORTED: c++98, c++03 |
| |
| #include <memory> |
| #include <type_traits> |
| #include <utility> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "unique_ptr_test_helper.h" |
| |
| // test converting move ctor. Should only require a MoveConstructible deleter, or if |
| // deleter is a reference, not even that. |
| // Explicit version |
| |
| template <class LHS, class RHS> |
| void checkReferenceDeleter(LHS& lhs, RHS& rhs) { |
| typedef typename LHS::deleter_type NewDel; |
| static_assert(std::is_reference<NewDel>::value, ""); |
| rhs.get_deleter().set_state(42); |
| assert(rhs.get_deleter().state() == 42); |
| assert(lhs.get_deleter().state() == 42); |
| lhs.get_deleter().set_state(99); |
| assert(lhs.get_deleter().state() == 99); |
| assert(rhs.get_deleter().state() == 99); |
| } |
| |
| template <class LHS, class RHS> |
| void checkDeleter(LHS& lhs, RHS& rhs, int LHSVal, int RHSVal) { |
| assert(lhs.get_deleter().state() == LHSVal); |
| assert(rhs.get_deleter().state() == RHSVal); |
| } |
| |
| template <class LHS, class RHS> |
| void checkCtor(LHS& lhs, RHS& rhs, A* RHSVal) { |
| assert(lhs.get() == RHSVal); |
| assert(rhs.get() == nullptr); |
| assert(A::count == 1); |
| assert(B::count == 1); |
| } |
| |
| void checkNoneAlive() { |
| assert(A::count == 0); |
| assert(B::count == 0); |
| } |
| |
| 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_constructible<UA, UB&&>::value, ""); |
| static_assert(!std::is_constructible<UA, UB&>::value, ""); |
| static_assert(!std::is_constructible<UA, const UB&>::value, ""); |
| } |
| { // cannot move if the deleter-types cannot convert |
| static_assert(std::is_constructible<UAD, UBD&&>::value, ""); |
| static_assert(!std::is_constructible<UAD, UB&&>::value, ""); |
| static_assert(!std::is_constructible<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_constructible<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_constructible<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_constructible<UA1, UA2&&>::value, ""); |
| static_assert(!std::is_constructible<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_constructible<UA1, UA2&&>::value, ""); |
| static_assert(!std::is_constructible<UA1, UB1&&>::value, ""); |
| } |
| } |
| |
| void test_noexcept() { |
| { |
| typedef std::unique_ptr<A> APtr; |
| typedef std::unique_ptr<B> BPtr; |
| static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, ""); |
| } |
| { |
| typedef std::unique_ptr<A, Deleter<A> > APtr; |
| typedef std::unique_ptr<B, Deleter<B> > BPtr; |
| static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, ""); |
| } |
| { |
| typedef std::unique_ptr<A, NCDeleter<A>&> APtr; |
| typedef std::unique_ptr<B, NCDeleter<A>&> BPtr; |
| static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, ""); |
| } |
| { |
| typedef std::unique_ptr<A, const NCConstDeleter<A>&> APtr; |
| typedef std::unique_ptr<B, const NCConstDeleter<A>&> BPtr; |
| static_assert(std::is_nothrow_constructible<APtr, BPtr>::value, ""); |
| } |
| } |
| |
| int main() { |
| { |
| test_sfinae(); |
| test_noexcept(); |
| } |
| { |
| typedef std::unique_ptr<A> APtr; |
| typedef std::unique_ptr<B> BPtr; |
| { // explicit |
| BPtr b(new B); |
| A* p = b.get(); |
| APtr a(std::move(b)); |
| checkCtor(a, b, p); |
| } |
| checkNoneAlive(); |
| { // implicit |
| BPtr b(new B); |
| A* p = b.get(); |
| APtr a = std::move(b); |
| checkCtor(a, b, p); |
| } |
| checkNoneAlive(); |
| } |
| { // test with moveable deleters |
| typedef std::unique_ptr<A, Deleter<A> > APtr; |
| typedef std::unique_ptr<B, Deleter<B> > BPtr; |
| { |
| Deleter<B> del(5); |
| BPtr b(new B, std::move(del)); |
| A* p = b.get(); |
| APtr a(std::move(b)); |
| checkCtor(a, b, p); |
| checkDeleter(a, b, 5, 0); |
| } |
| checkNoneAlive(); |
| { |
| Deleter<B> del(5); |
| BPtr b(new B, std::move(del)); |
| A* p = b.get(); |
| APtr a = std::move(b); |
| checkCtor(a, b, p); |
| checkDeleter(a, b, 5, 0); |
| } |
| checkNoneAlive(); |
| } |
| { // test with reference deleters |
| typedef std::unique_ptr<A, NCDeleter<A>&> APtr; |
| typedef std::unique_ptr<B, NCDeleter<A>&> BPtr; |
| NCDeleter<A> del(5); |
| { |
| BPtr b(new B, del); |
| A* p = b.get(); |
| APtr a(std::move(b)); |
| checkCtor(a, b, p); |
| checkReferenceDeleter(a, b); |
| } |
| checkNoneAlive(); |
| { |
| BPtr b(new B, del); |
| A* p = b.get(); |
| APtr a = std::move(b); |
| checkCtor(a, b, p); |
| checkReferenceDeleter(a, b); |
| } |
| checkNoneAlive(); |
| } |
| { |
| typedef std::unique_ptr<A, CDeleter<A> > APtr; |
| typedef std::unique_ptr<B, CDeleter<B>&> BPtr; |
| CDeleter<B> del(5); |
| { |
| BPtr b(new B, del); |
| A* p = b.get(); |
| APtr a(std::move(b)); |
| checkCtor(a, b, p); |
| checkDeleter(a, b, 5, 5); |
| } |
| checkNoneAlive(); |
| { |
| BPtr b(new B, del); |
| A* p = b.get(); |
| APtr a = std::move(b); |
| checkCtor(a, b, p); |
| checkDeleter(a, b, 5, 5); |
| } |
| checkNoneAlive(); |
| } |
| } |