Namespace
Varianti

std::unordered_map::emplace

Da cppreference.com.

 
 
 
std::unordered_map
Membri funzioni
Original:
Member functions
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unordered_map::unordered_map
unordered_map::~unordered_map
unordered_map::operator=
unordered_map::get_allocator
Iteratori
Original:
Iterators
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unordered_map::begin
unordered_map::cbegin
unordered_map::end
unordered_map::cend
Capacità
Original:
Capacity
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unordered_map::erase
unordered_map::size
unordered_map::max_size
Modificatori
Original:
Modifiers
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unordered_map::clear
unordered_map::insert
unordered_map::emplace
unordered_map::emplace_hint
unordered_map::erase
unordered_map::swap
Lookup
Original:
Lookup
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unordered_map::count
unordered_map::find
unordered_map::equal_range
Benna interfaccia
Original:
Bucket interface
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unordered_map::begin2
unordered_map::end2
unordered_map::bucket_count
unordered_map::max_bucket_count
unordered_map::bucket_size
unordered_map::bucket
Politica di Hash
Original:
Hash policy
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unordered_map::load_factor
unordered_map::max_load_factor
unordered_map::rehash
unordered_map::reserve
Osservatori
Original:
Observers
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unordered_map::hash_function
unordered_map::key_eq
 
template< class... Args >
std::pair<iterator,bool> emplace( Args&&... args );
(dal C++11)
Inserisce un nuovo elemento al contenitore. L'elemento è costruito sul posto, cioè non copia o operazioni di spostamento vengono eseguite. The constructor of the element type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....
Original:
Inserts a new element to the container. The element is constructed in-place, i.e. no copy or move operations are performed. The constructor of the element type (value_type, that is, std::pair<const Key, T>) is called with exactly the same arguments as supplied to the function, forwarded with std::forward<Args>(args)....
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If rehashing occurs due to the insertion, all iterators are invalidated. Otherwise iterators are not affected. References are not invalidated. Rehashing occurs only if the new number of elements is higher than max_load_factor()*bucket_count().

Indice

[modifica] Parametri

args -
argomenti da inoltrare al costruttore dell'elemento
Original:
arguments to forward to the constructor of the element
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[modifica] Valore di ritorno

returns a pair consisting of a bool denoting whether the insertion took place and an iterator to the inserted element.

[modifica] Complessità

Amortized constant on average, worst case linear in the size of the container.

[modifica] Vedi anche

costruisce elementi in-place con un suggerimento
Original:
constructs elements in-place using a hint
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(membro pubblico funzione) [edit]
inserti di elementi
Original:
inserts elements
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(membro pubblico funzione) [edit]