mirror of git://gcc.gnu.org/git/gcc.git
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
// Copyright (C) 2012-2018 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING3. If not see
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// <http://www.gnu.org/licenses/>.
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// { dg-do compile { target c++11 } }
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// libstdc++/52591
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#include <vector>
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#include <memory>
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#include <type_traits>
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// Move-assignment of std::vector<T> is allowed for non-MoveAssignable T when
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// the allocator type propagates. As an extension we also allow it if the
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// allocator type is known to always compare equal.
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struct C
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{
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C& operator=(C&&) = delete;
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};
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void test01()
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{
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std::vector<C> a;
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a = std::vector<C>();
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}
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template<typename T>
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struct A1 : std::allocator<T>
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{
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template<typename U> struct rebind { typedef A1<U> other; };
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A1() = default;
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template<typename U> A1(const A1<U>&) { }
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using propagate_on_container_move_assignment = std::true_type;
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using is_always_equal = std::false_type;
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};
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void test02()
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{
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using test_type = std::vector<C, A1<C>>;
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static_assert(std::is_nothrow_move_assignable<test_type>::value,
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"vector is nothrow move-assignable if allocator propagates");
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}
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template<typename T>
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struct A2 : std::allocator<T>
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{
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template<typename U> struct rebind { typedef A1<U> other; };
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A2() = default;
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template<typename U> A2(const A2<U>&) { }
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using propagate_on_container_move_assignment = std::false_type;
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using is_always_equal = std::true_type;
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};
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void test03()
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{
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using test_type = std::vector<C, A2<C>>;
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static_assert(std::is_nothrow_move_assignable<test_type>::value,
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"vector is nothrow move-assignable if allocator is always equal");
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}
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