std::codecvt::unshift, std::codecvt::do_unshift - cppreference.com
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      std::codecvt::unshift, std::codecvt::do_unshift

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      <metanoindex/>

       
      C++
       
      Biblioteca localizações
      Localidades e facetas
      Original:
      Locales and facets
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      Classificação de caracteres
      Original:
      Character classification
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      Conversões
      Original:
      Conversions
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      Facet classes base da categoria
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      Facet category base classes
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      Categorias faceta
      Original:
      Facet categories
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      Específicos da localidade facetas
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      Locale-specific facets
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      Facetas de conversão de código
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      Code conversion facets
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      (C++11)
      (C++11)
      C localidade
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      C locale
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      std::codecvt
       
      <tbody> </tbody>
      Definido no cabeçalho <locale>
      public: result unshift( stateT& state, externT* to, externT* to_end, externT*& to_next) const
      		 (1)
      protected: result do_unshift( stateT& state, externT* to, externT* to_end, externT*& to_next) const
      		 (2)

      1)

      função de membro público, chama a do_unshift função de membro da classe derivada mais.
      Original:
      public member function, calls the member function do_unshift of the most derived class.
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      2)

      se a codificação representado por esta faceta codecvt é dependente do estado, e state representa um estado de conversão que não é o estado inicial turno, escreve os caracteres necessários para regressar ao estado inicial turno. Os caracteres são escritos para uma matriz de caracteres cujo primeiro elemento é apontado por to. Não mais do que personagens to_end-to são escritos. O to_next parâmetro é atualizado para apontar um passado o último caractere escrito.
      Original:
      if the encoding represented by this codecvt facet is state-dependent, and state represents a conversion state that is not the initial shift state, writes the characters necessary to return to the initial shift state. The characters are written to a character array whose first element is pointed to by to. No more than to_end-to characters are written. The parameter to_next is updated to point one past the last character written.
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      Valor de retorno

      Um valor de std::codecvt_base::result tipo, que indica o estado de sucesso da seguinte forma:
      Original:
      A value of type std::codecvt_base::result, indicating the success status as follows:
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      ok
      todos os caracteres necessários foram escritos. state agora representa o estado deslocamento inicial
      Original:
      all necessary characters were written. state now represents initial shift state
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      partial
      não há espaço suficiente no buffer de saída. to_next == to_end
      Original:
      not enough space in the output buffer. to_next == to_end
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      error
      erro não especificado ocorreu
      Original:
      unspecified error occurred
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      noconv
      a codificação não é dependente do estado, nenhuma seqüência de terminação necessário
      Original:
      the encoding is not state-dependent, no termination sequence necessary
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      A especialização não-conversão std::codecvt<char, char, std::mbstate_t> sempre retorna std::codecvt_base::noconv
      Original:
      The non-converting specialization std::codecvt<char, char, std::mbstate_t> always returns std::codecvt_base::noconv
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      Notas

      Esta função é chamada por std::basic_filebuf::close() e em outras situações de finalização de um estado-dependente sequência de caracteres multibyte.
      Original:
      This function is called by std::basic_filebuf::close() and in other situations when finalizing a state-dependent multibyte character sequence.
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      Exemplo

      Esta seção está incompleta
      Motivo: sem exemplo

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