libstdc++-v3/testsuite/23_containers/unordered_set/allocator/move_assign.cc

// Copyright (C) 2013-2021 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-do run { target c++11 } }

#include <unordered_set>

#include <testsuite_hooks.h>
#include <testsuite_allocator.h>
#include <testsuite_counter_type.h>

using __gnu_test::propagating_allocator;
using __gnu_test::counter_type;
using __gnu_test::tracker_allocator;
using __gnu_test::tracker_allocator_counter;

void test01()
{
  tracker_allocator_counter::reset();
  {
    typedef propagating_allocator<counter_type, false,
				  tracker_allocator<counter_type>> alloc_type;
    typedef __gnu_test::counter_type_hasher hash;
    typedef std::unordered_set<counter_type, hash,
			       std::equal_to<counter_type>,
			       alloc_type> test_type;

    test_type v1(alloc_type(1));
    v1.emplace(0);

    test_type v2(alloc_type(2));
    v2.emplace(1);

    counter_type::reset();

    v2 = std::move(v1);

    VERIFY( 1 == v1.get_allocator().get_personality() );
    VERIFY( 2 == v2.get_allocator().get_personality() );

    VERIFY( counter_type::move_count == 1  );
    VERIFY( counter_type::destructor_count == 2 );
  }

  // Check there's nothing left allocated or constructed.
  VERIFY( tracker_allocator_counter::get_construct_count()
	  == tracker_allocator_counter::get_destruct_count() );
  VERIFY( tracker_allocator_counter::get_allocation_count()
	  == tracker_allocator_counter::get_deallocation_count() );
}

void test02()
{
  tracker_allocator_counter::reset();
  {
    typedef propagating_allocator<counter_type, true,
				  tracker_allocator<counter_type>> alloc_type;
    typedef __gnu_test::counter_type_hasher hash;
    typedef std::unordered_set<counter_type, hash,
			       std::equal_to<counter_type>,
			       alloc_type> test_type;

    test_type v1(alloc_type(1));
    v1.emplace(0);

    auto it = v1.begin();

    test_type v2(alloc_type(2));
    v2.emplace(0);

    counter_type::reset();

    v2 = std::move(v1);

    VERIFY(1 == v1.get_allocator().get_personality());
    VERIFY(1 == v2.get_allocator().get_personality());

    VERIFY( counter_type::move_count == 0 );
    VERIFY( counter_type::copy_count == 0 );
    VERIFY( counter_type::destructor_count == 1 );

    VERIFY( it == v2.begin() );
  }

  // Check there's nothing left allocated or constructed.
  VERIFY( tracker_allocator_counter::get_construct_count()
	  == tracker_allocator_counter::get_destruct_count() );
  VERIFY( tracker_allocator_counter::get_allocation_count()
	  == tracker_allocator_counter::get_deallocation_count() );
}

void test03()
{
  tracker_allocator_counter::reset();
  {
    typedef propagating_allocator<counter_type, false,
				  tracker_allocator<counter_type>> alloc_type;
    typedef __gnu_test::counter_type_hasher hash;
    typedef std::unordered_set<counter_type, hash,
			       std::equal_to<counter_type>,
			       alloc_type> test_type;

    test_type v1(alloc_type(1));
    v1.emplace(0);

    test_type v2(alloc_type(2));
    int i = 0;
    v2.emplace(i++);
    for (; v2.bucket_count() == v1.bucket_count(); ++i)
      v2.emplace(i);

    counter_type::reset();

    v2 = std::move(v1);

    VERIFY( 1 == v1.get_allocator().get_personality() );
    VERIFY( 2 == v2.get_allocator().get_personality() );

    VERIFY( counter_type::move_count == 1  );
    VERIFY( counter_type::destructor_count == i + 1 );
  }

  // Check there's nothing left allocated or constructed.
  VERIFY( tracker_allocator_counter::get_construct_count()
	  == tracker_allocator_counter::get_destruct_count() );
  VERIFY( tracker_allocator_counter::get_allocation_count()
	  == tracker_allocator_counter::get_deallocation_count() );
}

int main()
{
  test01();
  test02();
  test03();
  return 0;
}