size_type size() const;

size_type bucket( const Key& key ) const;

iterator begin();

allocator_type get_allocator() const;

key_compare key_comp() const;

void merge( forward_list& other ); (1)

float load_factor() const;

template< class Key, class Hash, class KeyEqual, class Alloc >

hasher hash_function() const;

void clear();