std::basic_streambuf::uflow - cppreference.com
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Garante que pelo menos um caracter está disponível na área de entrada, actualizando os ponteiros para a área de entrada (se necessário). Em caso de sucesso retorna o valor do caráter e avanços o valor da' ponteiro começar por um caractere. No retorno de falha traits::eof().
Original:
Ensures that at least one character is available in the input area by updating the pointers to the input area (if needed). On success returns the value of that character and advances the value of the get pointer by one character. On failure returns traits::eof().
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A função pode atualizar gptr, egptr e eback ponteiros para definir a localização dos dados recém-carregados (se houver). Em caso de falha, a função que assegura quer gptr() == nullptr ou gptr() == egptr.
Original:
The function may update gptr, egptr and eback pointers to define the location of newly loaded data (if any). On failure, the function ensures that either gptr() == nullptr or gptr() == egptr.
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A versão da classe base da função chama underflow. As classes derivadas podem substituir essa função para permitir atualizações para a área get no caso de exaustão.
Original:
The base class version of the function calls underflow. The derived classes may override this function to allow updates to the get area in the case of exhaustion.
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Parâmetros
(Nenhum)
Original:
(none)
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Valor de retorno
O valor do personagem que foi apontado pelo ponteiro' começar antes de ter sido avançado por um, ou de outro modo traits::eof().
Original:
The value of the character that was pointed to by the get pointer before it was advanced by one, or traits::eof() otherwise.
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A versão classe base da função retorna o valor retornado pelo underflow.
Original:
The base class version of the function returns the value returned by underflow.
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Nota
As funções públicas de std::streambuf chamar esta função somente se gptr() == nullptr ou gptr() >= egptr().
Original:
The public functions of std::streambuf call this function only if gptr() == nullptr or gptr() >= egptr().
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Exemplo
Veja também
lê caracteres da seqüência de entrada associado para a área get Original: reads characters from the associated input sequence to the get area The text has been machine-translated via Google Translate. (virtual protegido função de membro) [edit] | |
escreve caracteres para a seqüência de saída associado da área de venda Original: writes characters to the associated output sequence from the put area The text has been machine-translated via Google Translate. (virtual protegido função de membro) [edit] | |