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/*
* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
*
* This program 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 2 of the License, or (at your
* option) any later version.
*
* This program 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef TRINITYCORE_FLAT_SET_H
#define TRINITYCORE_FLAT_SET_H
#include <functional>
#include <vector>
namespace Trinity::Containers
{
template <class Key, class Compare = std::less<Key>, class KeyContainer = std::vector<Key>>
class FlatSet
{
public:
using iterator = typename KeyContainer::iterator;
using const_iterator = typename KeyContainer::const_iterator;
bool empty() const { return _storage.empty(); }
auto size() const { return _storage.size(); }
auto begin() { return _storage.begin(); }
auto begin() const { return _storage.begin(); }
auto end() { return _storage.end(); }
auto end() const { return _storage.end(); }
auto find(Key const& value) const
{
auto end = this->end();
auto itr = std::lower_bound(this->begin(), end, value, Compare());
if (itr != end && Compare()(value, *itr))
itr = end;
return itr;
}
auto find(Key const& value)
{
auto end = this->end();
auto itr = std::lower_bound(this->begin(), end, value, Compare());
if (itr != end && Compare()(value, *itr))
itr = end;
return itr;
}
template <class... Args>
std::pair<iterator, bool> emplace(Args&&... args)
{
Key newElement(std::forward<Args>(args)...);
auto end = this->end();
auto itr = std::lower_bound(this->begin(), end, newElement, Compare());
if (itr != end && !Compare()(newElement, *itr))
return { itr, false };
return { _storage.emplace(itr, std::move(newElement)), true };
}
std::pair<iterator, bool> insert(Key const& key) { return emplace(key); }
std::size_t erase(Key const& key)
{
auto itr = this->find(key);
if (itr == this->end())
return 0;
this->erase(itr);
return 1;
}
auto erase(const_iterator itr) { return _storage.erase(itr); }
void clear() { _storage.clear(); }
void shrink_to_fit() { _storage.shrink_to_fit(); }
friend bool operator==(FlatSet const& left, FlatSet const& right)
{
return left._storage == right._storage;
}
friend bool operator!=(FlatSet const& left, FlatSet const& right)
{
return !(left == right);
}
private:
KeyContainer _storage;
};
}
#endif // TRINITYCORE_FLAT_SET_H
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