| // { dg-do run { target c++11 } } |
| // { dg-require-effective-target hosted } |
| |
| // Copyright (C) 2016-2023 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING3. If not see |
| // <http://www.gnu.org/licenses/>. |
| |
| #include <memory> |
| #include <testsuite_hooks.h> |
| |
| // C++17 20.11.2.2.1 shared_ptr constructors [util.smartptr.shared.const] |
| |
| template<typename To, typename From> |
| constexpr bool check() |
| { |
| using std::shared_ptr; |
| using std::is_constructible; |
| return !is_constructible<shared_ptr<To>, shared_ptr<From>>::value |
| && !is_constructible<shared_ptr<To>, shared_ptr<From>&>::value; |
| } |
| |
| static_assert( check<int, int[]>() ); |
| static_assert( check<int, int[2]>() ); |
| static_assert( check<int[2], void>() ); |
| static_assert( check<int[2], int>() ); |
| static_assert( check<int[2], int[]>() ); |
| static_assert( check<int[], void>() ); |
| static_assert( check<int[], int>() ); |
| |
| int count = 0; |
| |
| struct A { |
| A() { ++count; } |
| ~A() { --count; } |
| }; |
| |
| struct B : A { }; |
| |
| static_assert( check<A, B[2]>() ); |
| static_assert( check<A, B[]>() ); |
| static_assert( check<A[2], B>() ); |
| static_assert( check<A[2], B[2]>() ); |
| static_assert( check<A[2], B[]>() ); |
| static_assert( check<A[], B>() ); |
| static_assert( check<A[], B[2]>() ); |
| static_assert( check<A[], B[]>() ); |
| |
| void |
| test01() |
| { |
| std::shared_ptr<A[2]> p; |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p.use_count() == 0 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test02() |
| { |
| std::shared_ptr<A[]> p; |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p.use_count() == 0 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test03() |
| { |
| std::shared_ptr<A[2]> p(nullptr); |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p.use_count() == 0 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test04() |
| { |
| std::shared_ptr<A[]> p(nullptr); |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p.use_count() == 0 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| // Construction from pointer |
| |
| void |
| test05() |
| { |
| A * const a = nullptr; |
| std::shared_ptr<A[2]> p(a); |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p.use_count() == 1 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test06() |
| { |
| A * const a = nullptr; |
| std::shared_ptr<A[]> p(a); |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p.use_count() == 1 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test07() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| VERIFY( p.get() == a ); |
| VERIFY( p.use_count() == 1 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test08() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[]> p(a); |
| VERIFY( p.get() == a ); |
| VERIFY( p.use_count() == 1 ); |
| p.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| // Converting constructor |
| |
| void |
| test09() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| std::shared_ptr<const A[2]> p2(p); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 2 ); |
| VERIFY( p2.use_count() == 2 ); |
| p.reset(); |
| VERIFY( count != 0 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test10() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[]> p(a); |
| std::shared_ptr<const A[]> p2(p); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 2 ); |
| VERIFY( p2.use_count() == 2 ); |
| p.reset(); |
| VERIFY( count != 0 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test11() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| std::shared_ptr<const A[]> p2(p); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 2 ); |
| VERIFY( p2.use_count() == 2 ); |
| p.reset(); |
| VERIFY( count != 0 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| // Copy construction |
| |
| void |
| test12() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| std::shared_ptr<A[2]> p2(p); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 2 ); |
| VERIFY( p2.use_count() == 2 ); |
| p.reset(); |
| VERIFY( count != 0 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test13() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| std::shared_ptr<A[]> p2(p); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 2 ); |
| VERIFY( p2.use_count() == 2 ); |
| p.reset(); |
| VERIFY( count != 0 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| // Move construction |
| |
| void |
| test14() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| std::shared_ptr<A[2]> p2(std::move(p)); |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 0 ); |
| VERIFY( p2.use_count() == 1 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| void |
| test15() |
| { |
| A * const a = new A[2]; |
| std::shared_ptr<A[2]> p(a); |
| std::shared_ptr<A[]> p2(std::move(p)); |
| VERIFY( p.get() == nullptr ); |
| VERIFY( p2.get() == a ); |
| VERIFY( p.use_count() == 0 ); |
| VERIFY( p2.use_count() == 1 ); |
| p2.reset(); |
| VERIFY( count == 0 ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| test04(); |
| test05(); |
| test06(); |
| test07(); |
| test08(); |
| test09(); |
| test10(); |
| test11(); |
| test12(); |
| test13(); |
| test14(); |
| test15(); |
| } |