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52 lines
1.6 KiB
C++
52 lines
1.6 KiB
C++
/*
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* This file is part of the TrinityCore Project. See AUTHORS file for Copyright information
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TRINITYCORE_MAP_UTILS_H
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#define TRINITYCORE_MAP_UTILS_H
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#include <type_traits>
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namespace Trinity::Containers
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{
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/**
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* Returns a pointer to mapped value (or the value itself if map stores pointers)
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*/
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template<class M>
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auto MapGetValuePtr(M& map, typename M::key_type const& key)
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{
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auto itr = map.find(key);
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if constexpr (std::is_pointer_v<typename M::mapped_type>)
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return itr != map.end() ? itr->second : nullptr;
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else
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return itr != map.end() ? &itr->second : nullptr;
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}
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template<class K, class V, template<class, class, class...> class M, class... Rest>
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void MultimapErasePair(M<K, V, Rest...>& multimap, K const& key, V const& value)
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{
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auto range = multimap.equal_range(key);
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for (auto itr = range.first; itr != range.second;)
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{
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if (itr->second == value)
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itr = multimap.erase(itr);
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else
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++itr;
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}
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}
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}
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#endif // TRINITYCORE_MAP_UTILS_H
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