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56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
#pragma once
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#include <DB/Common/HashTable/TwoLevelHashTable.h>
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#include <DB/Common/HashTable/HashMap.h>
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template
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<
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typename Key,
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typename Cell,
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typename Hash = DefaultHash<Key>,
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typename Grower = TwoLevelHashTableGrower<>,
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typename Allocator = HashTableAllocator
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>
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class TwoLevelHashMapTable : public TwoLevelHashTable<Key, Cell, Hash, Grower, Allocator, HashMapTable<Key, Cell, Hash, Grower, Allocator> >
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{
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public:
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typedef Key key_type;
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typedef typename Cell::Mapped mapped_type;
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typedef typename Cell::value_type value_type;
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mapped_type & operator[](Key x)
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{
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typename TwoLevelHashMapTable::iterator it;
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bool inserted;
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this->emplace(x, it, inserted);
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if (!__has_trivial_constructor(mapped_type) && inserted)
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new(&it->second) mapped_type();
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return it->second;
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}
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};
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template
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<
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typename Key,
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typename Mapped,
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typename Hash = DefaultHash<Key>,
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typename Grower = TwoLevelHashTableGrower<>,
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typename Allocator = HashTableAllocator
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>
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using TwoLevelHashMap = TwoLevelHashMapTable<Key, HashMapCell<Key, Mapped, Hash>, Hash, Grower, Allocator>;
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template
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<
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typename Key,
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typename Mapped,
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typename Hash = DefaultHash<Key>,
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typename Grower = TwoLevelHashTableGrower<>,
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typename Allocator = HashTableAllocator
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>
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using TwoLevelHashMapWithSavedHash = TwoLevelHashMapTable<Key, HashMapCellWithSavedHash<Key, Mapped, Hash>, Hash, Grower, Allocator>;
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