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      std::map::operator[]

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      <metanoindex/>

       
      C++
       
      Recipientes biblioteca
       
      std::map
      Funções de membro
      Original:
      Member functions
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      map::map
      map::~map
      map::operator=
      map::get_allocator
      acesso. Elemento
      Original:
      Element access
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      map::at
      map::operator[]
      Iteradores
      Original:
      Iterators
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      map::begin
      map::cbegin
      (C++11)
      map::end
      map::cend
      (C++11)
      map::rbegin
      map::crbegin
      (C++11)
      map::rend
      map::crend
      (C++11)
      Capacidade
      Original:
      Capacity
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      map::empty
      map::size
      map::max_size
      Modificadores
      Original:
      Modifiers
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      map::clear
      map::insert
      map::emplace(C++11)
      map::emplace_hint(C++11)
      map::erase
      map::swap
      Pesquisa
      Original:
      Lookup
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      map::count
      map::find
      map::equal_range
      map::lower_bound
      map::upper_bound
      Observadores
      Original:
      Observers
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      map::key_comp
      map::value_comp
       
      <tbody> </tbody>
      T& operator[]( const Key& key );
      		 (1)
      T& operator[]( Key&& key );
      		 (2) (desde C++11)
      Insere um novo elemento para o recipiente utilizando key como a chave padrão e valor calculado mapeada e retorna uma referência para o valor recém-construído mapeados. Se um elemento com key chave já existe, não é realizada de inserção e uma referência ao seu valor mapeado é devolvido.
      Original:
      Inserts a new element to the container using key as the key and default constructed mapped value and returns a reference to the newly constructed mapped value. If an element with key key already exists, no insertion is performed and a reference to its mapped value is returned.
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      1)

      Executa essencialmente (insert(std::make_pair(key, T())).first)->second.
      Original:
      Essentially performs (insert(std::make_pair(key, T())).first)->second.
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      2)

      Executa essencialmente (insert(std::make_pair(std::move(key), T())).first)->second.
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      Essentially performs (insert(std::make_pair(std::move(key), T())).first)->second.
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      No iterators or references are invalidated.

      Parâmetros

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

      Referência ao valor mapeada do elemento novo se nenhum elemento com chave key existiu. Caso contrário, uma referência ao valor do elemento mapeada existente é retornado.
      Original:
      Reference to the mapped value of the new element if no element with key key existed. Otherwise a reference to the mapped value of the existing element is returned.
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      Complexidade

      Logarithmic in the size of the container.

      Exemplo

      Esta seção está incompleta
      Motivo: sem exemplo

      Veja também

      (C++11)
      acessar o elemento especificado com verificação de limites
      Original:
      access specified element with bounds checking
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      (função pública membro) [edit]