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std::unordered_map::emplace

Da cppreference.com

 
 
 
std::unordered_map
Funções de membro
Original:
Member functions
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unordered_map::unordered_map
unordered_map::~unordered_map
unordered_map::operator=
unordered_map::get_allocator
Iteradores
Original:
Iterators
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unordered_map::begin
unordered_map::cbegin
unordered_map::end
unordered_map::cend
Capacidade
Original:
Capacity
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unordered_map::erase
unordered_map::size
unordered_map::max_size
Modificadores
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
Pesquisa
Original:
Lookup
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unordered_map::count
unordered_map::find
unordered_map::equal_range
Interface de balde
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
Política de hash
Original:
Hash policy
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unordered_map::load_factor
unordered_map::max_load_factor
unordered_map::rehash
unordered_map::reserve
Observadores
Original:
Observers
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unordered_map::hash_function
unordered_map::key_eq
 
template< class... Args >
std::pair<iterator,bool> emplace( Args&&... args );
(a partir do C++ 11)
Insere um novo elemento ao recipiente. O elemento é construído no local, ou seja, nenhuma cópia ou operações de movimentação são executadas. 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().

Índice

[editar] Parâmetros

args -
argumentos para encaminhar para o construtor do elemento
Original:
arguments to forward to the constructor of the element
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[editar] Valor de retorno

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

[editar] Complexidade

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

[editar] Veja também

constrói elementos no local usando uma dica
Original:
constructs elements in-place using a hint
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(função pública membro) [edit]
insere elementos
Original:
inserts elements
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(função pública membro) [edit]