map.h

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/**********************************************************\
 
  This file is part of the
  https://github.com/morzhovets/momo
  project, distributed under the MIT License. See
  https://github.com/morzhovets/momo/blob/branch_cpp11/LICENSE
  for details.
 
  momo/stdish/map.h
 
  namespace momo::stdish:
    class map
    class multimap
 
\**********************************************************/
 
#ifndef MOMO_INCLUDE_GUARD_STDISH_MAP
#define MOMO_INCLUDE_GUARD_STDISH_MAP
 
#include "../TreeMap.h"
#include "set_map_utility.h"
 
namespace momo
{
 
namespace stdish
{
 
namespace internal
{
    template<typename TKey, typename TLessFunc>
    class map_value_compare
    {
    protected:
        typedef TKey Key;
        typedef TLessFunc LessFunc;
 
    public:
        template<typename Value>
        bool operator()(const Value& value1, const Value& value2) const
        {
            MOMO_STATIC_ASSERT(std::is_same<Key,
                typename std::decay<decltype(value1.first)>::type>::value);
            return comp(value1.first, value2.first);
        }
 
    protected:
        map_value_compare(const LessFunc& lessFunc)
            : comp(lessFunc)
        {
        }
 
    protected:
        LessFunc comp;
    };
 
    template<typename TKey, typename TMapped, typename TLessFunc, typename TAllocator,
        typename TTreeMap>
    class map_base
    {
    private:
        typedef TTreeMap TreeMap;
        typedef typename TreeMap::TreeTraits TreeTraits;
        typedef typename TreeMap::MemManager MemManager;
 
        typedef typename TreeMap::Iterator TreeMapIterator;
 
    public:
        typedef TKey key_type;
        typedef TMapped mapped_type;
        typedef TLessFunc key_compare;
        typedef TAllocator allocator_type;
 
        typedef TreeMap nested_container_type;
 
        typedef size_t size_type;
        typedef ptrdiff_t difference_type;
 
        typedef std::pair<const key_type, mapped_type> value_type;
 
        typedef map_value_compare<key_type, key_compare> value_compare;
 
        typedef momo::internal::TreeDerivedIterator<TreeMapIterator,
            momo::internal::MapReferenceStd> iterator;
        typedef typename iterator::ConstIterator const_iterator;
 
        typedef typename iterator::Reference reference;
        typedef typename const_iterator::Reference const_reference;
 
        typedef typename iterator::Pointer pointer;
        typedef typename const_iterator::Pointer const_pointer;
        //typedef typename std::allocator_traits<allocator_type>::pointer pointer;
        //typedef typename std::allocator_traits<allocator_type>::const_pointer const_pointer;
 
        typedef std::reverse_iterator<iterator> reverse_iterator;
        typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
 
        typedef internal::map_node_handle<typename TreeMap::ExtractedPair> node_type;
        typedef internal::insert_return_type<iterator, node_type> insert_return_type;
 
    private:
        template<typename KeyArg>
        struct IsValidKeyArg : public TreeTraits::template IsValidKeyArg<KeyArg>
        {
        };
 
        struct ConstIteratorProxy : public const_iterator
        {
            typedef const_iterator ConstIterator;
            MOMO_DECLARE_PROXY_CONSTRUCTOR(ConstIterator)
            MOMO_DECLARE_PROXY_FUNCTION(ConstIterator, GetBaseIterator,
                typename ConstIterator::BaseIterator)
        };
 
        struct IteratorProxy : public iterator
        {
            typedef iterator Iterator;
            MOMO_DECLARE_PROXY_CONSTRUCTOR(Iterator)
            MOMO_DECLARE_PROXY_FUNCTION(Iterator, GetBaseIterator, TreeMapIterator)
        };
 
        struct NodeTypeProxy : private node_type
        {
            typedef node_type NodeType;
            MOMO_DECLARE_PROXY_FUNCTION(NodeType, GetExtractedPair,
                typename NodeType::MapExtractedPair&)
        };
 
    public:
        map_base()
        {
        }
 
        explicit map_base(const allocator_type& alloc)
            : mTreeMap(TreeTraits(), MemManager(alloc))
        {
        }
 
        explicit map_base(const key_compare& lessFunc, const allocator_type& alloc = allocator_type())
            : mTreeMap(TreeTraits(lessFunc), MemManager(alloc))
        {
        }
 
        template<typename Iterator>
        map_base(Iterator first, Iterator last, const allocator_type& alloc = allocator_type())
            : map_base(alloc)
        {
            insert(first, last);
        }
 
        template<typename Iterator>
        map_base(Iterator first, Iterator last, const key_compare& lessFunc,
            const allocator_type& alloc = allocator_type())
            : map_base(lessFunc, alloc)
        {
            insert(first, last);
        }
 
        map_base(std::initializer_list<momo::internal::Identity<value_type>> values,
            const allocator_type& alloc = allocator_type())
            : map_base(values.begin(), values.end(), alloc)
        {
        }
 
        map_base(std::initializer_list<momo::internal::Identity<value_type>> values,
            const key_compare& lessFunc, const allocator_type& alloc = allocator_type())
            : map_base(values.begin(), values.end(), lessFunc, alloc)
        {
        }
 
#ifdef MOMO_HAS_CONTAINERS_RANGES
        template<std::ranges::input_range Range>
        requires std::convertible_to<std::ranges::range_reference_t<Range>, value_type>
        map_base(std::from_range_t, Range&& values, const allocator_type& alloc = allocator_type())
            : map_base(alloc)
        {
            insert_range(std::forward<Range>(values));
        }
 
        template<std::ranges::input_range Range>
        requires std::convertible_to<std::ranges::range_reference_t<Range>, value_type>
        map_base(std::from_range_t, Range&& values, const key_compare& lessFunc,
            const allocator_type& alloc = allocator_type())
            : map_base(lessFunc, alloc)
        {
            insert_range(std::forward<Range>(values));
        }
#endif // MOMO_HAS_CONTAINERS_RANGES
 
        map_base(map_base&& right) noexcept
            : mTreeMap(std::move(right.mTreeMap))
        {
        }
 
        map_base(map_base&& right, const momo::internal::Identity<allocator_type>& alloc)
            noexcept(std::is_empty<allocator_type>::value)
            : mTreeMap(pvCreateMap(std::move(right), alloc))
        {
        }
 
        map_base(const map_base& right)
            : mTreeMap(right.mTreeMap)
        {
        }
 
        map_base(const map_base& right, const momo::internal::Identity<allocator_type>& alloc)
            : mTreeMap(right.mTreeMap, MemManager(alloc))
        {
        }
 
        ~map_base() = default;
 
        map_base& operator=(map_base&& right)
            noexcept(std::is_empty<allocator_type>::value ||
                std::allocator_traits<allocator_type>::propagate_on_container_move_assignment::value)
        {
            if (this != &right)
            {
                bool propagate = std::is_empty<allocator_type>::value ||
                    std::allocator_traits<allocator_type>::propagate_on_container_move_assignment::value;
                allocator_type alloc = (propagate ? &right : this)->get_allocator();
                mTreeMap = pvCreateMap(std::move(right), alloc);
            }
            return *this;
        }
 
        map_base& operator=(const map_base& right)
        {
            if (this != &right)
            {
                bool propagate = std::is_empty<allocator_type>::value ||
                    std::allocator_traits<allocator_type>::propagate_on_container_copy_assignment::value;
                allocator_type alloc = (propagate ? &right : this)->get_allocator();
                mTreeMap = TreeMap(right.mTreeMap, MemManager(alloc));
            }
            return *this;
        }
 
        void swap(map_base& right) noexcept
        {
            MOMO_ASSERT(std::allocator_traits<allocator_type>::propagate_on_container_swap::value
                || get_allocator() == right.get_allocator());
            mTreeMap.Swap(right.mTreeMap);
        }
 
        const nested_container_type& get_nested_container() const noexcept
        {
            return mTreeMap;
        }
 
        nested_container_type& get_nested_container() noexcept
        {
            return mTreeMap;
        }
 
        const_iterator begin() const noexcept
        {
            return ConstIteratorProxy(mTreeMap.GetBegin());
        }
 
        iterator begin() noexcept
        {
            return IteratorProxy(mTreeMap.GetBegin());
        }
 
        const_iterator end() const noexcept
        {
            return ConstIteratorProxy(mTreeMap.GetEnd());
        }
 
        iterator end() noexcept
        {
            return IteratorProxy(mTreeMap.GetEnd());
        }
 
        const_reverse_iterator rbegin() const noexcept
        {
            return const_reverse_iterator(end());
        }
 
        reverse_iterator rbegin() noexcept
        {
            return reverse_iterator(end());
        }
 
        const_reverse_iterator rend() const noexcept
        {
            return const_reverse_iterator(begin());
        }
 
        reverse_iterator rend() noexcept
        {
            return reverse_iterator(begin());
        }
 
        const_iterator cbegin() const noexcept
        {
            return begin();
        }
 
        const_iterator cend() const noexcept
        {
            return end();
        }
 
        const_reverse_iterator crbegin() const noexcept
        {
            return rbegin();
        }
 
        const_reverse_iterator crend() const noexcept
        {
            return rend();
        }
 
        key_compare key_comp() const
        {
            return mTreeMap.GetTreeTraits().GetLessFunc();
        }
 
        value_compare value_comp() const
        {
            struct ValueCompareProxy : public value_compare
            {
                explicit ValueCompareProxy(const key_compare& keyComp)
                    : value_compare(keyComp)
                {
                }
            };
            return ValueCompareProxy(key_comp());
        }
 
        allocator_type get_allocator() const noexcept
        {
            return allocator_type(mTreeMap.GetMemManager().GetByteAllocator());
        }
 
        size_type max_size() const noexcept
        {
            return std::allocator_traits<allocator_type>::max_size(get_allocator());
        }
 
        size_type size() const noexcept
        {
            return mTreeMap.GetCount();
        }
 
        MOMO_NODISCARD bool empty() const noexcept
        {
            return mTreeMap.IsEmpty();
        }
 
        void clear() noexcept
        {
            mTreeMap.Clear();
        }
 
        const_iterator find(const key_type& key) const
        {
            return ConstIteratorProxy(mTreeMap.Find(key));
        }
 
        iterator find(const key_type& key)
        {
            return IteratorProxy(mTreeMap.Find(key));
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        const_iterator> find(const KeyArg& key) const
        {
            return ConstIteratorProxy(mTreeMap.Find(key));
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        iterator> find(const KeyArg& key)
        {
            return IteratorProxy(mTreeMap.Find(key));
        }
 
        size_type count(const key_type& key) const
        {
            return mTreeMap.GetKeyCount(key);
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        size_type> count(const KeyArg& key) const
        {
            return mTreeMap.GetKeyCount(key);
        }
 
        bool contains(const key_type& key) const
        {
            return mTreeMap.ContainsKey(key);
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        bool> contains(const KeyArg& key) const
        {
            return mTreeMap.ContainsKey(key);
        }
 
        const_iterator lower_bound(const key_type& key) const
        {
            return ConstIteratorProxy(mTreeMap.GetLowerBound(key));
        }
 
        iterator lower_bound(const key_type& key)
        {
            return IteratorProxy(mTreeMap.GetLowerBound(key));
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        const_iterator> lower_bound(const KeyArg& key) const
        {
            return ConstIteratorProxy(mTreeMap.GetLowerBound(key));
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        iterator> lower_bound(const KeyArg& key)
        {
            return IteratorProxy(mTreeMap.GetLowerBound(key));
        }
 
        const_iterator upper_bound(const key_type& key) const
        {
            return ConstIteratorProxy(mTreeMap.GetUpperBound(key));
        }
 
        iterator upper_bound(const key_type& key)
        {
            return IteratorProxy(mTreeMap.GetUpperBound(key));
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        const_iterator> upper_bound(const KeyArg& key) const
        {
            return ConstIteratorProxy(mTreeMap.GetUpperBound(key));
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        iterator> upper_bound(const KeyArg& key)
        {
            return IteratorProxy(mTreeMap.GetUpperBound(key));
        }
 
        std::pair<const_iterator, const_iterator> equal_range(const key_type& key) const
        {
            const_iterator iter = lower_bound(key);
            if (TreeTraits::multiKey)
                return { iter, upper_bound(key) };
            if (iter == end() || mTreeMap.GetTreeTraits().IsLess(key, iter->first))
                return { iter, iter };
            return { iter, std::next(iter) };
        }
 
        std::pair<iterator, iterator> equal_range(const key_type& key)
        {
            iterator iter = lower_bound(key);
            if (TreeTraits::multiKey)
                return { iter, upper_bound(key) };
            if (iter == end() || mTreeMap.GetTreeTraits().IsLess(key, iter->first))
                return { iter, iter };
            return { iter, std::next(iter) };
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        std::pair<const_iterator, const_iterator>> equal_range(const KeyArg& key) const
        {
            return { lower_bound(key), upper_bound(key) };
        }
 
        template<typename KeyArg>
        momo::internal::EnableIf<IsValidKeyArg<KeyArg>::value,
        std::pair<iterator, iterator>> equal_range(const KeyArg& key)
        {
            return { lower_bound(key), upper_bound(key) };
        }
 
        template<typename ValueArg = std::pair<key_type, mapped_type>>
        momo::internal::EnableIf<std::is_constructible<value_type, ValueArg&&>::value,
        std::pair<iterator, bool>> insert(ValueArg&& valueArg)
        {
            return emplace(std::forward<ValueArg>(valueArg));
        }
 
        template<typename ValueArg = std::pair<key_type, mapped_type>>
        momo::internal::EnableIf<std::is_constructible<value_type, ValueArg&&>::value,
        iterator> insert(const_iterator hint, ValueArg&& valueArg)
        {
            return emplace_hint(hint, std::forward<ValueArg>(valueArg));
        }
 
        insert_return_type insert(node_type&& node)
        {
            if (node.empty())
                return { end(), false, node_type() };
            typename TreeMap::InsertResult res = mTreeMap.Insert(
                std::move(NodeTypeProxy::GetExtractedPair(node)));
            return { IteratorProxy(res.position), res.inserted,
                res.inserted ? node_type() : std::move(node) };
        }
 
        iterator insert(const_iterator hint, node_type&& node)
        {
            if (node.empty())
                return end();
            std::pair<iterator, bool> res = pvFind(hint, node.key());
            if (!res.second)
                return res.first;
            return IteratorProxy(mTreeMap.Add(IteratorProxy::GetBaseIterator(res.first),
                std::move(NodeTypeProxy::GetExtractedPair(node))));
        }
 
        template<typename Iterator>
        void insert(Iterator first, Iterator last)
        {
            pvInsertRange(first, last);
        }
 
        void insert(std::initializer_list<value_type> values)
        {
            mTreeMap.Insert(values.begin(), values.end());
        }
 
#ifdef MOMO_HAS_CONTAINERS_RANGES
        template<std::ranges::input_range Range>
        requires std::convertible_to<std::ranges::range_reference_t<Range>, value_type>
        void insert_range(Range&& values)
        {
            pvInsertRange(std::ranges::begin(values), std::ranges::end(values));
        }
#endif // MOMO_HAS_CONTAINERS_RANGES
 
        std::pair<iterator, bool> emplace()
        {
            return ptEmplace(nullptr, std::tuple<>(), std::tuple<>());
        }
 
        iterator emplace_hint(const_iterator hint)
        {
            return ptEmplace(hint, std::tuple<>(), std::tuple<>()).first;
        }
 
        template<typename ValueArg>
        std::pair<iterator, bool> emplace(ValueArg&& valueArg)
        {
            return ptEmplace(nullptr,
                std::forward_as_tuple(std::get<0>(std::forward<ValueArg>(valueArg))),
                std::forward_as_tuple(std::get<1>(std::forward<ValueArg>(valueArg))));
        }
 
        template<typename ValueArg>
        iterator emplace_hint(const_iterator hint, ValueArg&& valueArg)
        {
            return ptEmplace(hint,
                std::forward_as_tuple(std::get<0>(std::forward<ValueArg>(valueArg))),
                std::forward_as_tuple(std::get<1>(std::forward<ValueArg>(valueArg)))).first;
        }
 
        template<typename KeyArg, typename MappedArg>
        std::pair<iterator, bool> emplace(KeyArg&& keyArg, MappedArg&& mappedArg)
        {
            return ptEmplace(nullptr, std::forward_as_tuple(std::forward<KeyArg>(keyArg)),
                std::forward_as_tuple(std::forward<MappedArg>(mappedArg)));
        }
 
        template<typename KeyArg, typename MappedArg>
        iterator emplace_hint(const_iterator hint, KeyArg&& keyArg, MappedArg&& mappedArg)
        {
            return ptEmplace(hint, std::forward_as_tuple(std::forward<KeyArg>(keyArg)),
                std::forward_as_tuple(std::forward<MappedArg>(mappedArg))).first;
        }
 
        template<typename... KeyArgs, typename... MappedArgs>
        std::pair<iterator, bool> emplace(std::piecewise_construct_t,
            std::tuple<KeyArgs...> keyArgs, std::tuple<MappedArgs...> mappedArgs)
        {
            return ptEmplace(nullptr, std::move(keyArgs), std::move(mappedArgs));
        }
 
        template<typename... KeyArgs, typename... MappedArgs>
        iterator emplace_hint(const_iterator hint, std::piecewise_construct_t,
            std::tuple<KeyArgs...> keyArgs, std::tuple<MappedArgs...> mappedArgs)
        {
            return ptEmplace(hint, std::move(keyArgs), std::move(mappedArgs)).first;
        }
 
        iterator erase(const_iterator where)
        {
            return IteratorProxy(mTreeMap.Remove(ConstIteratorProxy::GetBaseIterator(where)));
        }
 
        iterator erase(iterator where)
        {
            return erase(static_cast<const_iterator>(where));
        }
 
        iterator erase(const_iterator first, const_iterator last)
        {
            return IteratorProxy(mTreeMap.Remove(ConstIteratorProxy::GetBaseIterator(first),
                ConstIteratorProxy::GetBaseIterator(last)));
        }
 
        size_type erase(const key_type& key)
        {
            return mTreeMap.Remove(key);
        }
 
        node_type extract(const_iterator where)
        {
            return node_type(*this, where); // need RVO for exception safety
        }
 
        node_type extract(const key_type& key)
        {
            const_iterator iter = find(key);
            return (iter != end()) ? extract(iter) : node_type();
        }
 
        template<typename Map>
        void merge(Map&& map)
        {
            mTreeMap.MergeFrom(map.get_nested_container());
        }
 
        friend bool operator==(const map_base& left, const map_base& right)
        {
            return left.size() == right.size()
                && std::equal(left.begin(), left.end(), right.begin());
        }
 
#ifdef MOMO_HAS_THREE_WAY_COMPARISON
        friend auto operator<=>(const map_base& left, const map_base& right)
            requires requires (const_reference ref) { ref <=> ref; }
        {
            return std::lexicographical_compare_three_way(left.begin(), left.end(),
                right.begin(), right.end());
        }
#else
        friend bool operator<(const map_base& left, const map_base& right)
        {
            return std::lexicographical_compare(left.begin(), left.end(),
                right.begin(), right.end());
        }
#endif
 
        MOMO_MORE_COMPARISON_OPERATORS(const map_base&)
 
    protected:  //?
        void ptAssign(std::initializer_list<value_type> values)
        {
            TreeMap treeMap(mTreeMap.GetTreeTraits(), MemManager(get_allocator()));
            treeMap.Insert(values.begin(), values.end());
            mTreeMap = std::move(treeMap);
        }
 
        template<typename Hint, typename... KeyArgs, typename... MappedArgs>
        std::pair<iterator, bool> ptEmplace(Hint hint, std::tuple<KeyArgs...>&& keyArgs,
            std::tuple<MappedArgs...>&& mappedArgs)
        {
            typedef typename TreeMap::KeyValueTraits
                ::template ValueCreator<MappedArgs...> MappedCreator;
            return pvInsert(hint, std::move(keyArgs),
                MappedCreator(mTreeMap.GetMemManager(), std::move(mappedArgs)));
        }
 
    private:
        static TreeMap pvCreateMap(map_base&& right, const allocator_type& alloc)
        {
            if (right.get_allocator() == alloc)
                return std::move(right.mTreeMap);
            TreeMap treeMap(right.mTreeMap.GetTreeTraits(), MemManager(alloc));
            treeMap.MergeFrom(right.mTreeMap);
            return treeMap;
        }
 
        bool pvIsOrdered(const key_type& key1, const key_type& key2) const
        {
            const TreeTraits& treeTraits = mTreeMap.GetTreeTraits();
            return TreeTraits::multiKey ? !treeTraits.IsLess(key2, key1)
                : treeTraits.IsLess(key1, key2);
        }
 
        std::pair<iterator, bool> pvFind(std::nullptr_t /*hint*/, const key_type& key)
        {
            iterator iter = upper_bound(key);
            if (!TreeTraits::multiKey && iter != begin())
            {
                iterator prevIter = std::prev(iter);
                if (!mTreeMap.GetTreeTraits().IsLess(prevIter->first, key))
                    return { prevIter, false };
            }
            return { iter, true };
        }
 
        std::pair<iterator, bool> pvFind(const_iterator hint, const key_type& key)
        {
            if (hint != begin() && !pvIsOrdered(std::prev(hint)->first, key))
                return pvFind(nullptr, key);
            if (hint != end() && !pvIsOrdered(key, hint->first))
            {
                if (TreeTraits::multiKey)
                    return { lower_bound(key), true };
                else
                    return pvFind(nullptr, key);
            }
            return { IteratorProxy(mTreeMap.MakeMutableIterator(
                ConstIteratorProxy::GetBaseIterator(hint))), true };
        }
 
        template<typename Hint, typename... KeyArgs, typename MappedCreator>
        std::pair<iterator, bool> pvInsert(Hint hint, std::tuple<KeyArgs...>&& keyArgs,
            MappedCreator&& mappedCreator)
        {
            MemManager& memManager = mTreeMap.GetMemManager();
            typedef momo::internal::ObjectBuffer<key_type,
                TreeMap::KeyValueTraits::keyAlignment> KeyBuffer;
            typedef momo::internal::ObjectManager<key_type, MemManager> KeyManager;
            typedef typename KeyManager::template Creator<KeyArgs...> KeyCreator;
            KeyBuffer keyBuffer;
            KeyCreator(memManager, std::move(keyArgs))(keyBuffer.GetPtr());
            key_type* keyPtr = keyBuffer.template GetPtr<true>();
            try
            {
                std::pair<iterator, bool> res = pvFind(hint, *keyPtr);
                if (!res.second)
                {
                    KeyManager::Destroy(memManager, *keyPtr);
                    keyPtr = nullptr;
                    return res;
                }
                auto valueCreator = [&memManager, &keyPtr, &mappedCreator]
                    (key_type* newKey, mapped_type* newMapped)
                {
                    KeyManager::Relocate(memManager, *keyPtr, newKey);
                    keyPtr = nullptr;
                    try
                    {
                        std::forward<MappedCreator>(mappedCreator)(newMapped);
                    }
                    catch (...)
                    {
                        KeyManager::Destroy(memManager, *newKey);
                        throw;
                    }
                };
                TreeMapIterator resIter = mTreeMap.AddCrt(
                    IteratorProxy::GetBaseIterator(res.first), valueCreator);
                return { IteratorProxy(resIter), true };
            }
            catch (...)
            {
                if (keyPtr != nullptr)
                    KeyManager::Destroy(memManager, *keyPtr);
                throw;
            }
        }
 
        template<typename Hint, typename RKey, typename MappedCreator,
            typename Key = typename std::decay<RKey>::type>
        momo::internal::EnableIf<std::is_same<key_type, Key>::value,
        std::pair<iterator, bool>> pvInsert(Hint hint, std::tuple<RKey>&& key,
            MappedCreator&& mappedCreator)
        {
            std::pair<iterator, bool> res = pvFind(hint,
                static_cast<const key_type&>(std::get<0>(key)));
            if (!res.second)
                return res;
            TreeMapIterator resIter = mTreeMap.AddCrt(IteratorProxy::GetBaseIterator(res.first),
                std::forward<RKey>(std::get<0>(key)), std::forward<MappedCreator>(mappedCreator));
            return { IteratorProxy(resIter), true };
        }
 
        template<typename Iterator, typename Sentinel>
        momo::internal::EnableIf<momo::internal::IsMapArgIteratorStd<Iterator, key_type>::value,
        void> pvInsertRange(Iterator begin, Sentinel end)
        {
            mTreeMap.Insert(std::move(begin), std::move(end));
        }
 
        template<typename Iterator, typename Sentinel>
        momo::internal::EnableIf<!momo::internal::IsMapArgIteratorStd<Iterator, key_type>::value,
        void> pvInsertRange(Iterator begin, Sentinel end)
        {
            for (Iterator iter = std::move(begin); iter != end; ++iter)
                insert(*iter);
        }
 
    private:
        TreeMap mTreeMap;
    };
}
 
template<typename TKey, typename TMapped,
    typename TLessFunc = std::less<TKey>,
    typename TAllocator = std::allocator<std::pair<const TKey, TMapped>>,
    typename TTreeMap = TreeMap<TKey, TMapped, TreeTraitsStd<TKey, TLessFunc>,
        MemManagerStd<TAllocator>>>
class map : public internal::map_base<TKey, TMapped, TLessFunc, TAllocator, TTreeMap>
{
private:
    typedef internal::map_base<TKey, TMapped, TLessFunc, TAllocator, TTreeMap> BaseMap;
    typedef TTreeMap TreeMap;
 
public:
    using typename BaseMap::key_type;
    using typename BaseMap::mapped_type;
    using typename BaseMap::size_type;
    using typename BaseMap::value_type;
    using typename BaseMap::const_reference;
    using typename BaseMap::const_iterator;
    using typename BaseMap::iterator;
 
public:
    using BaseMap::BaseMap;
 
    map& operator=(std::initializer_list<value_type> values)
    {
        BaseMap::ptAssign(values);
        return *this;
    }
 
    friend void swap(map& left, map& right) noexcept
    {
        left.swap(right);
    }
 
    typename TreeMap::ValueReferenceRKey operator[](key_type&& key)
    {
        return BaseMap::get_nested_container()[std::move(key)];
    }
 
    typename TreeMap::ValueReferenceCKey operator[](const key_type& key)
    {
        return BaseMap::get_nested_container()[key];
    }
 
    const mapped_type& at(const key_type& key) const
    {
        const_iterator iter = BaseMap::find(key);
        if (iter == BaseMap::end())
            throw std::out_of_range("invalid map key");
        return iter->second;
    }
 
    mapped_type& at(const key_type& key)
    {
        iterator iter = BaseMap::find(key);
        if (iter == BaseMap::end())
            throw std::out_of_range("invalid map key");
        return iter->second;
    }
 
    template<typename... MappedArgs>
    std::pair<iterator, bool> try_emplace(key_type&& key, MappedArgs&&... mappedArgs)
    {
        return BaseMap::ptEmplace(nullptr, std::forward_as_tuple(std::move(key)),
            std::forward_as_tuple(std::forward<MappedArgs>(mappedArgs)...));
    }
 
    template<typename... MappedArgs>
    iterator try_emplace(const_iterator hint, key_type&& key, MappedArgs&&... mappedArgs)
    {
        return BaseMap::ptEmplace(hint, std::forward_as_tuple(std::move(key)),
            std::forward_as_tuple(std::forward<MappedArgs>(mappedArgs)...)).first;
    }
 
    template<typename... MappedArgs>
    std::pair<iterator, bool> try_emplace(const key_type& key, MappedArgs&&... mappedArgs)
    {
        return BaseMap::ptEmplace(nullptr, std::forward_as_tuple(key),
            std::forward_as_tuple(std::forward<MappedArgs>(mappedArgs)...));
    }
 
    template<typename... MappedArgs>
    iterator try_emplace(const_iterator hint, const key_type& key, MappedArgs&&... mappedArgs)
    {
        return BaseMap::ptEmplace(hint, std::forward_as_tuple(key),
            std::forward_as_tuple(std::forward<MappedArgs>(mappedArgs)...)).first;
    }
 
    template<typename MappedArg>
    std::pair<iterator, bool> insert_or_assign(key_type&& key, MappedArg&& mappedArg)
    {
        return pvInsertOrAssign(nullptr, std::move(key), std::forward<MappedArg>(mappedArg));
    }
 
    template<typename MappedArg>
    iterator insert_or_assign(const_iterator hint, key_type&& key, MappedArg&& mappedArg)
    {
        return pvInsertOrAssign(hint, std::move(key), std::forward<MappedArg>(mappedArg)).first;
    }
 
    template<typename MappedArg>
    std::pair<iterator, bool> insert_or_assign(const key_type& key, MappedArg&& mappedArg)
    {
        return pvInsertOrAssign(nullptr, key, std::forward<MappedArg>(mappedArg));
    }
 
    template<typename MappedArg>
    iterator insert_or_assign(const_iterator hint, const key_type& key, MappedArg&& mappedArg)
    {
        return pvInsertOrAssign(hint, key, std::forward<MappedArg>(mappedArg)).first;
    }
 
    template<typename ValueFilter>
    friend size_type erase_if(map& cont, const ValueFilter& valueFilter)
    {
        auto pairFilter = [&valueFilter] (const key_type& key, const mapped_type& mapped)
            { return valueFilter(const_reference(key, mapped)); };
        return cont.get_nested_container().Remove(pairFilter);
    }
 
private:
    template<typename Hint, typename RKey, typename MappedArg>
    std::pair<iterator, bool> pvInsertOrAssign(Hint hint, RKey&& key, MappedArg&& mappedArg)
    {
        std::pair<iterator, bool> res = BaseMap::ptEmplace(hint,
            std::forward_as_tuple(std::forward<RKey>(key)),
            std::forward_as_tuple(std::forward<MappedArg>(mappedArg)));
        if (!res.second)
            res.first->second = std::forward<MappedArg>(mappedArg);
        return res;
    }
};
 
template<typename TKey, typename TMapped,
    typename TLessFunc = std::less<TKey>,
    typename TAllocator = std::allocator<std::pair<const TKey, TMapped>>,
    typename TTreeMap = TreeMap<TKey, TMapped, TreeTraitsStd<TKey, TLessFunc, true>,
        MemManagerStd<TAllocator>>>
class multimap : public internal::map_base<TKey, TMapped, TLessFunc, TAllocator, TTreeMap>
{
private:
    typedef internal::map_base<TKey, TMapped, TLessFunc, TAllocator, TTreeMap> BaseMap;
 
public:
    using typename BaseMap::key_type;
    using typename BaseMap::mapped_type;
    using typename BaseMap::size_type;
    using typename BaseMap::value_type;
    using typename BaseMap::iterator;
    using typename BaseMap::const_reference;
    using typename BaseMap::const_iterator;
    using typename BaseMap::node_type;
 
    typedef iterator insert_return_type;
 
public:
    using BaseMap::BaseMap;
 
    multimap& operator=(std::initializer_list<value_type> values)
    {
        BaseMap::ptAssign(values);
        return *this;
    }
 
    friend void swap(multimap& left, multimap& right) noexcept
    {
        left.swap(right);
    }
 
    //using BaseMap::insert;    // gcc 5 & 6
 
    template<typename ValueArg = std::pair<key_type, mapped_type>>
    momo::internal::EnableIf<std::is_constructible<value_type, ValueArg&&>::value,
    iterator> insert(ValueArg&& valueArg)
    {
        return BaseMap::insert(std::forward<ValueArg>(valueArg)).first;
    }
 
    template<typename ValueArg = std::pair<key_type, mapped_type>>
    momo::internal::EnableIf<std::is_constructible<value_type, ValueArg&&>::value,
    iterator> insert(const_iterator hint, ValueArg&& valueArg)
    {
        return BaseMap::insert(hint, std::forward<ValueArg>(valueArg));
    }
 
    iterator insert(node_type&& node)
    {
        return BaseMap::insert(std::move(node)).position;
    }
 
    iterator insert(const_iterator hint, node_type&& node)
    {
        return BaseMap::insert(hint, std::move(node));
    }
 
    template<typename Iterator>
    void insert(Iterator first, Iterator last)
    {
        BaseMap::insert(first, last);
    }
 
    void insert(std::initializer_list<value_type> values)
    {
        BaseMap::insert(values);
    }
 
    template<typename... ValueArgs>
    iterator emplace(ValueArgs&&... valueArgs)
    {
        return BaseMap::emplace(std::forward<ValueArgs>(valueArgs)...).first;
    }
 
    template<typename ValueFilter>
    friend size_type erase_if(multimap& cont, const ValueFilter& valueFilter)
    {
        auto pairFilter = [&valueFilter] (const key_type& key, const mapped_type& mapped)
            { return valueFilter(const_reference(key, mapped)); };
        return cont.get_nested_container().Remove(pairFilter);
    }
};
 
#ifdef MOMO_HAS_DEDUCTION_GUIDES
 
#define MOMO_DECLARE_DEDUCTION_GUIDES(map) \
template<typename Iterator, \
    typename Value = typename std::iterator_traits<Iterator>::value_type, \
    typename Key = std::decay_t<typename Value::first_type>, \
    typename Mapped = std::decay_t<typename Value::second_type>, \
    typename Allocator = std::allocator<std::pair<const Key, Mapped>>, \
    typename = internal::ordered_checker<Key, Allocator>> \
map(Iterator, Iterator, Allocator = Allocator()) \
    -> map<Key, Mapped, std::less<Key>, Allocator>; \
template<typename Iterator, typename LessFunc, \
    typename Value = typename std::iterator_traits<Iterator>::value_type, \
    typename Key = std::decay_t<typename Value::first_type>, \
    typename Mapped = std::decay_t<typename Value::second_type>, \
    typename Allocator = std::allocator<std::pair<const Key, Mapped>>, \
    typename = internal::ordered_checker<Key, Allocator, LessFunc>> \
map(Iterator, Iterator, LessFunc, Allocator = Allocator()) \
    -> map<Key, Mapped, LessFunc, Allocator>; \
template<typename CKey, typename Mapped, \
    typename Key = std::remove_const_t<CKey>, \
    typename Allocator = std::allocator<std::pair<const Key, Mapped>>, \
    typename = internal::ordered_checker<Key, Allocator>> \
map(std::initializer_list<std::pair<CKey, Mapped>>, Allocator = Allocator()) \
    -> map<Key, Mapped, std::less<Key>, Allocator>; \
template<typename CKey, typename Mapped, typename LessFunc, \
    typename Key = std::remove_const_t<CKey>, \
    typename Allocator = std::allocator<std::pair<const Key, Mapped>>, \
    typename = internal::ordered_checker<Key, Allocator, LessFunc>> \
map(std::initializer_list<std::pair<CKey, Mapped>>, LessFunc, Allocator = Allocator()) \
    -> map<Key, Mapped, LessFunc, Allocator>;
 
MOMO_DECLARE_DEDUCTION_GUIDES(map)
MOMO_DECLARE_DEDUCTION_GUIDES(multimap)
 
#undef MOMO_DECLARE_DEDUCTION_GUIDES
 
#ifdef MOMO_HAS_CONTAINERS_RANGES
 
#define MOMO_DECLARE_DEDUCTION_GUIDES_RANGES(map) \
template<std::ranges::input_range Range, \
    typename Value = std::ranges::range_value_t<Range>, \
    typename Key = std::decay_t<typename Value::first_type>, \
    typename Mapped = std::decay_t<typename Value::second_type>, \
    typename Allocator = std::allocator<std::pair<const Key, Mapped>>, \
    typename = internal::ordered_checker<Key, Allocator>> \
map(std::from_range_t, Range&&, Allocator = Allocator()) \
    -> map<Key, Mapped, std::less<Key>, Allocator>; \
template<std::ranges::input_range Range, typename LessFunc, \
    typename Value = std::ranges::range_value_t<Range>, \
    typename Key = std::decay_t<typename Value::first_type>, \
    typename Mapped = std::decay_t<typename Value::second_type>, \
    typename Allocator = std::allocator<std::pair<const Key, Mapped>>, \
    typename = internal::ordered_checker<Key, Allocator, LessFunc>> \
map(std::from_range_t, Range&&, LessFunc, Allocator = Allocator()) \
    -> map<Key, Mapped, LessFunc, Allocator>;
 
MOMO_DECLARE_DEDUCTION_GUIDES_RANGES(map)
MOMO_DECLARE_DEDUCTION_GUIDES_RANGES(multimap)
 
#undef MOMO_DECLARE_DEDUCTION_GUIDES_RANGES
 
#endif // MOMO_HAS_CONTAINERS_RANGES
 
#endif // MOMO_HAS_DEDUCTION_GUIDES
 
} // namespace stdish
 
} // namespace momo
 
#endif // MOMO_INCLUDE_GUARD_STDISH_MAP