| // Copyright (C) 2017-2021 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/>. |
| |
| // { dg-options "-std=gnu++2a" } |
| // { dg-do run { target c++2a } } |
| |
| #include <memory> |
| #include <testsuite_hooks.h> |
| |
| class P1 |
| { |
| public: |
| using element_type = int; |
| |
| explicit P1(int* p) |
| : p_(p) { } |
| |
| int* operator->() const noexcept |
| { return p_; } |
| |
| private: |
| int* p_; |
| }; |
| |
| class P2 |
| { |
| public: |
| using element_type = int; |
| |
| explicit P2(int* p) |
| : p_(p) { } |
| |
| P1 operator->() const noexcept |
| { return p_; } |
| |
| private: |
| P1 p_; |
| }; |
| |
| class P3 |
| { |
| public: |
| explicit P3(int* p) |
| : p_(p) { } |
| |
| int* get() const noexcept |
| { return p_; } |
| |
| private: |
| int* p_; |
| }; |
| |
| namespace std |
| { |
| template<> |
| struct pointer_traits<::P3> |
| { |
| static int* to_address(const ::P3& p) noexcept |
| { return p.get(); } |
| }; |
| } |
| |
| class P4 |
| { |
| public: |
| explicit P4(int* p) |
| : p_(p) { } |
| |
| int* operator->() const noexcept |
| { return nullptr; } |
| |
| int* get() const noexcept |
| { return p_; } |
| |
| private: |
| int* p_; |
| }; |
| |
| namespace std |
| { |
| template<> |
| struct pointer_traits<::P4> |
| { |
| static int* to_address(const ::P4& p) noexcept |
| { return p.get(); } |
| }; |
| } |
| |
| void test01() |
| { |
| int i = 0; |
| int* p = &i; |
| VERIFY( std::to_address(p) == &i ); |
| } |
| |
| void test02() |
| { |
| int i = 0; |
| P1 p(&i); |
| VERIFY( std::to_address(p) == &i ); |
| } |
| |
| void test03() |
| { |
| int i = 0; |
| P2 p(&i); |
| VERIFY( std::to_address(p) == &i ); |
| } |
| |
| void test04() |
| { |
| int i = 0; |
| P3 p(&i); |
| VERIFY( std::to_address(p) == &i ); |
| } |
| |
| void test05() |
| { |
| int i = 0; |
| P4 p(&i); |
| VERIFY( std::to_address(p) == &i ); |
| } |
| |
| int main() |
| { |
| test01(); |
| test02(); |
| test03(); |
| test04(); |
| test05(); |
| return 0; |
| } |