| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| |
| //============================================================================= |
| // TESTING std::unique_ptr::unique_ptr(pointer) |
| // |
| // Concerns: |
| // 1 The pointer constructor works for any default constructible deleter types. |
| // 2 The pointer constructor accepts pointers to derived types. |
| // 2 The stored type 'T' is allowed to be incomplete. |
| // |
| // Plan |
| // 1 Construct unique_ptr<T, D>'s with a pointer to 'T' and various deleter |
| // types (C-1) |
| // 2 Construct unique_ptr<T, D>'s with a pointer to 'D' and various deleter |
| // types where 'D' is derived from 'T'. (C-1,2) |
| // 3 Construct a unique_ptr<T, D> with a pointer to 'T' and various deleter |
| // types where 'T' is an incomplete type (C-1,3) |
| |
| // Test unique_ptr(pointer) ctor |
| |
| #include <memory> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "unique_ptr_test_helper.h" |
| |
| // unique_ptr(pointer) ctor should only require default Deleter ctor |
| |
| template <bool IsArray> |
| void test_pointer() { |
| typedef typename std::conditional<!IsArray, A, A[]>::type ValueT; |
| const int expect_alive = IsArray ? 5 : 1; |
| #if TEST_STD_VER >= 11 |
| { |
| using U1 = std::unique_ptr<ValueT>; |
| using U2 = std::unique_ptr<ValueT, Deleter<ValueT> >; |
| |
| // Test for noexcept |
| static_assert(std::is_nothrow_constructible<U1, A*>::value, ""); |
| static_assert(std::is_nothrow_constructible<U2, A*>::value, ""); |
| |
| // Test for explicit |
| static_assert(!std::is_convertible<A*, U1>::value, ""); |
| static_assert(!std::is_convertible<A*, U2>::value, ""); |
| } |
| #endif |
| { |
| A* p = newValue<ValueT>(expect_alive); |
| assert(A::count == expect_alive); |
| std::unique_ptr<ValueT> s(p); |
| assert(s.get() == p); |
| } |
| assert(A::count == 0); |
| { |
| A* p = newValue<ValueT>(expect_alive); |
| assert(A::count == expect_alive); |
| std::unique_ptr<ValueT, NCDeleter<ValueT> > s(p); |
| assert(s.get() == p); |
| assert(s.get_deleter().state() == 0); |
| } |
| assert(A::count == 0); |
| } |
| |
| void test_derived() { |
| { |
| B* p = new B; |
| assert(A::count == 1); |
| assert(B::count == 1); |
| std::unique_ptr<A> s(p); |
| assert(s.get() == p); |
| } |
| assert(A::count == 0); |
| assert(B::count == 0); |
| { |
| B* p = new B; |
| assert(A::count == 1); |
| assert(B::count == 1); |
| std::unique_ptr<A, NCDeleter<A> > s(p); |
| assert(s.get() == p); |
| assert(s.get_deleter().state() == 0); |
| } |
| assert(A::count == 0); |
| assert(B::count == 0); |
| } |
| |
| #if TEST_STD_VER >= 11 |
| struct NonDefaultDeleter { |
| NonDefaultDeleter() = delete; |
| void operator()(void*) const {} |
| }; |
| |
| struct GenericDeleter { |
| void operator()(void*) const; |
| }; |
| #endif |
| |
| template <class T> |
| void test_sfinae() { |
| #if TEST_STD_VER >= 11 |
| { // the constructor does not participate in overload resultion when |
| // the deleter is a pointer type |
| using U = std::unique_ptr<T, void (*)(void*)>; |
| static_assert(!std::is_constructible<U, T*>::value, ""); |
| } |
| { // the constructor does not participate in overload resolution when |
| // the deleter is not default constructible |
| using Del = CDeleter<T>; |
| using U1 = std::unique_ptr<T, NonDefaultDeleter>; |
| using U2 = std::unique_ptr<T, Del&>; |
| using U3 = std::unique_ptr<T, Del const&>; |
| static_assert(!std::is_constructible<U1, T*>::value, ""); |
| static_assert(!std::is_constructible<U2, T*>::value, ""); |
| static_assert(!std::is_constructible<U3, T*>::value, ""); |
| } |
| #endif |
| } |
| |
| static void test_sfinae_runtime() { |
| #if TEST_STD_VER >= 11 |
| { // the constructor does not participate in overload resolution when |
| // a base <-> derived conversion would occur. |
| using UA = std::unique_ptr<A[]>; |
| using UAD = std::unique_ptr<A[], GenericDeleter>; |
| using UAC = std::unique_ptr<const A[]>; |
| using UB = std::unique_ptr<B[]>; |
| using UBD = std::unique_ptr<B[], GenericDeleter>; |
| using UBC = std::unique_ptr<const B[]>; |
| |
| static_assert(!std::is_constructible<UA, B*>::value, ""); |
| static_assert(!std::is_constructible<UB, A*>::value, ""); |
| static_assert(!std::is_constructible<UAD, B*>::value, ""); |
| static_assert(!std::is_constructible<UBD, A*>::value, ""); |
| static_assert(!std::is_constructible<UAC, const B*>::value, ""); |
| static_assert(!std::is_constructible<UBC, const A*>::value, ""); |
| } |
| #endif |
| } |
| |
| DEFINE_AND_RUN_IS_INCOMPLETE_TEST({ |
| { doIncompleteTypeTest(1, getNewIncomplete()); } |
| checkNumIncompleteTypeAlive(0); |
| { |
| doIncompleteTypeTest<IncompleteType, NCDeleter<IncompleteType> >( |
| 1, getNewIncomplete()); |
| } |
| checkNumIncompleteTypeAlive(0); |
| }) |
| |
| int main() { |
| { |
| test_pointer</*IsArray*/ false>(); |
| test_derived(); |
| test_sfinae<int>(); |
| } |
| { |
| test_pointer</*IsArray*/ true>(); |
| test_sfinae<int[]>(); |
| test_sfinae_runtime(); |
| } |
| } |