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// Copyright (C) 2016-2022 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++17 } }
#include <unordered_map>
#include <testsuite_hooks.h>
using test_type = std::unordered_map<int, int>;
void
test01()
{
test_type c{ {1, 10}, {2, 20}, {3, 30} };
test_type::node_type node;
test_type::insert_return_type ins;
test_type::iterator pos;
node = c.extract(0);
VERIFY( !node );
VERIFY( node.empty() );
VERIFY( c.size() == 3 );
ins = c.insert(std::move(node));
VERIFY( !node );
VERIFY( node.empty() );
VERIFY( c.size() == 3 );
VERIFY( !ins.inserted );
VERIFY( !ins.node );
VERIFY( ins.position == c.end() );
node = c.extract(1);
VERIFY( (bool)node );
VERIFY( !node.empty() );
VERIFY( c.size() == 2 );
VERIFY( node.get_allocator() == c.get_allocator() );
VERIFY( node.key() == 1 );
VERIFY( node.mapped() == 10 );
node.key() = 4;
node.mapped() = 40;
VERIFY( node.key() == 4 );
VERIFY( node.mapped() == 40 );
ins = c.insert(std::move(node));
VERIFY( !node );
VERIFY( node.empty() );
VERIFY( c.size() == 3 );
VERIFY( ins.inserted );
VERIFY( !ins.node );
VERIFY( ins.position != c.end() );
VERIFY( ins.position->first == 4 );
VERIFY( ins.position->second == 40 );
VERIFY( c.count(1) == 0 );
VERIFY( c.count(4) == 1 );
pos = c.insert(c.begin(), std::move(node));
VERIFY( !node );
VERIFY( node.empty() );
VERIFY( c.size() == 3 );
VERIFY( pos == c.end() );
pos = c.insert(c.begin(), c.extract(2));
VERIFY( c.size() == 3 );
VERIFY( pos != c.end() );
VERIFY( pos->first == 2 );
VERIFY( pos->second == 20 );
test_type c2 = c;
node = c2.extract(3);
ins = c.insert(std::move(node));
VERIFY( node.empty() );
VERIFY( ins.position != c.end() );
VERIFY( !ins.inserted );
VERIFY( !ins.node.empty() );
VERIFY( ins.node.key() == 3 );
VERIFY( ins.node.mapped() == 30 );
auto hasher = c.hash_function();
VERIFY( hasher(ins.position->first) == hasher(ins.node.key()) );
auto eq = c.key_eq();
VERIFY( eq(ins.position->first, ins.node.key()) );
}
void
test02()
{
test_type c{ {1, 10}, {2, 20}, {3, 30} };
test_type::node_type node;
test_type::insert_return_type ins;
const int key = c.begin()->first;
node = c.extract(c.begin());
VERIFY( (bool)node );
VERIFY( !node.empty() );
VERIFY( c.size() == 2 );
VERIFY( node.get_allocator() == c.get_allocator() );
VERIFY( node.key() == key );
VERIFY( node.mapped() == (key * 10) );
ins = c.insert(std::move(node));
VERIFY( node.empty() );
VERIFY( c.size() == 3 );
VERIFY( ins.inserted );
VERIFY( !ins.node );
VERIFY( ins.position != c.end() );
VERIFY( ins.position->first == key );
VERIFY( ins.position->second == (key * 10) );
}
void
test03()
{
struct hash : std::hash<int> { };
struct equal : std::equal_to<int> { };
using std::is_same_v;
using compat_type1 = std::unordered_map<int, int, hash, equal>;
static_assert( is_same_v<test_type::node_type, compat_type1::node_type> );
using compat_type2 = std::unordered_multimap<int, int>;
static_assert( is_same_v<test_type::node_type, compat_type2::node_type> );
using compat_type3 = std::unordered_multimap<int, int, hash, equal>;
static_assert( is_same_v<test_type::node_type, compat_type3::node_type> );
}
void
test04()
{
// Check order of members in insert_return_type
auto [pos, ins, node] = test_type::insert_return_type{};
using std::is_same_v;
static_assert( is_same_v<test_type::iterator, decltype(pos)> );
static_assert( is_same_v<bool, decltype(ins)> );
static_assert( is_same_v<test_type::node_type, decltype(node)> );
}
int
main()
{
test01();
test02();
test03();
}