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template <typename Key, typename Value, size_t TblPower = 2>
struct HashMap {
	struct Node
	{
		Key k;
		Value v;
		Node *n;

		Node(const Key &key, const Value &value) :
			k(key), v(value), n(NULL) {}

		Node(const Key &key) :
			k(key), v(), n(NULL) {}
	};

	constexpr static size_t TblSize = 1U << TblPower;
	Node *table[TblSize] = {nullptr};

	HashMap() {
	}

	~HashMap() {
		for(size_t i = 0; i < TblSize; i++)
		{
			Node *entry = table[i];
			while(entry)
			{
				Node *prev = entry;
				entry = entry->n;
				delete prev;
			}
			table[i] = NULL;
		}
	}

	size_t HashFunc(const Key &key) const
	{
		/// TODO: string hash?
		// handle hash: handle pointers usually aligned
		return (((size_t) key) >> 8)  & (TblSize - 1);
	}

	// just in case: check existance or constant access
	forceinline Value *GetPtr(const Key &key) const
	{
		size_t hashValue = HashFunc(key);
		Node *entry = table[hashValue];
		while(likely(entry))
		{
			if(entry->k == key)
				return &entry->v;
			entry = entry->n;
		}
		return nullptr;
	}

	Value &operator [] (const Key &key)
	{
		return GetOrAllocate(key);
	}

#define HASHFIND(key) \
		size_t hashValue = HashFunc(key); \
		Node *prev = NULL; \
		Node *entry = table[hashValue]; \
	\
		while(entry && entry->k != key) \
		{ \
			prev = entry; \
			entry = entry->n; \
		}

	Node * noinline _Allocate(Key key, size_t hashValue, Node *prev, Node *entry)
	{
		entry = new Node(key);
		if(unlikely(!entry))
		{
			static Node error(key);
			return &error;
		}

		if(prev == NULL)
			table[hashValue] = entry;
		else
			prev->n = entry;
		return entry;
	}

	Value& GetOrAllocate(const Key &key)
	{
		HASHFIND(key);

		if(unlikely(!entry))
			entry = _Allocate(key,hashValue, prev, entry);

		return entry->v;
	}
// тут был ещё один метод, но в говнокод не влез
}