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std::unordered_map::at

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
 
T& at( const Key& key );
(1) (a partir do C++ 11)
const T & at( const Key& key ) const;
(2) (a partir do C++ 11)
Retorna uma referência para o valor mapeado do elemento com chave equivalente a key. Se tal elemento não existe, uma exceção do tipo std::out_of_range é jogado.
Original:
Returns a reference to the mapped value of the element with key equivalent to key. If no such element exists, an exception of type std::out_of_range is thrown.
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Índice

[editar] Parâmetros

key -
a chave do elemento de encontrar
Original:
the key of the element to find
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[editar] Valor de retorno

Referência ao valor mapeado do elemento solicitado
Original:
Reference to the mapped value of the requested element
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[editar] Exceções

std::out_of_range se o recipiente não tem um elemento com a key especificado
Original:
std::out_of_range if the container does not have an element with the specified key
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[editar] Complexidade

Average case: constant, worst case: linear in size.

[editar] Veja também

acessar o elemento especificado
Original:
access specified element
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(função pública membro) [edit]