| // Copyright (C) 2020-2023 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/>. |
| |
| // { dg-do run { target c++11 } } |
| |
| #include <unordered_set> |
| |
| #include <testsuite_allocator.h> |
| #include <testsuite_hooks.h> |
| |
| int moves = 0; |
| |
| struct X |
| { |
| X() = default; |
| X(const X&) = default; |
| X(int i) : _i(i) {} |
| |
| // Move constructor might throw |
| X(X&& x) noexcept(false) |
| { |
| this->_i = x._i; |
| x._i = -1; |
| ++moves; |
| } |
| |
| int _i; |
| }; |
| |
| struct XHasher |
| { |
| std::size_t |
| operator()(const X& x) const noexcept |
| { return x._i; } |
| }; |
| |
| struct XEqualTo |
| { |
| bool |
| operator()(const X& lhs, const X& rhs) const noexcept |
| { return lhs._i == rhs._i; } |
| }; |
| |
| void |
| test01() |
| { |
| using A = __gnu_test::propagating_allocator<X, false>; |
| A a1(1), a2(2); |
| std::unordered_set<X, XHasher, XEqualTo, A> u1(a1), u2(a2); |
| u1 = { X(0), X(1), X(2) }; |
| u2 = { X(3), X(4), X(5) }; |
| |
| moves = 0; |
| u1 = std::move(u2); |
| |
| VERIFY( moves == 3 ); |
| VERIFY( u1.count(X(1)) == 0 ); |
| VERIFY( u1.count(X(3)) == 1 ); |
| } |
| |
| int |
| main() |
| { |
| test01(); |
| } |