std::basic_streambuf::uflow - cppreference.com
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      std::basic_streambuf::uflow

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      <metanoindex/>

       
      C++
       
      De entrada / saída da biblioteca
      I / O manipuladores
      C estilo de I / O
      Buffers
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      Buffers
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      (obsoleta)
      Streams
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      Streams
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      Abstrações
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      Abstractions
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      File I / O
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      File I/O
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      Cordas I / O
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      String I/O
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      Matriz de I / O
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      Array I/O
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      (obsoleta)
      (obsoleta)
      (obsoleta)
      Tipos
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      Types
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      Interface de categoria de erro
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      Error category interface
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      (C++11)
      (C++11)
       
      std::basic_streambuf
      Membro funções públicas
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      Public member functions
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      basic_streambuf::~basic_streambuf
      Localidades
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      Locales
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      basic_streambuf::pubimbue
      basic_streambuf::getloc
      Posicionamento
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      Positioning
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      basic_streambuf::pubsetbuf
      basic_streambuf::pubseekoff
      basic_streambuf::pubseekpos
      basic_streambuf::pubsync
      Obter área
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      Get area
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      basic_streambuf::in_avail
      basic_streambuf::snextc
      basic_streambuf::sbumpc
      basic_streambuf::sgetc
      basic_streambuf::sgetn
      Coloque área
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      Put area
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      basic_streambuf::sputc
      basic_streambuf::sputn
      Putback
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      Putback
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      basic_streambuf::sputbackc
      basic_streambuf::sungetc
      Protegido funções de membro
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      Protected member functions
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      basic_streambuf::basic_streambuf
      basic_streambuf::operator=(C++11)
      basic_streambuf::swap(C++11)
      Localidades
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      Locales
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      basic_streambuf::imbue
      Posicionamento
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      Positioning
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      basic_streambuf::setbuf
      basic_streambuf::seekoff
      basic_streambuf::seekpos
      basic_streambuf::sync
      Obter área
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      Get area
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      basic_streambuf::showmanyc
      basic_streambuf::underflow
      basic_streambuf::uflow
      basic_streambuf::xsgetn
      basic_streambuf::eback
      basic_streambuf::gptr
      basic_streambuf::egptr
      basic_streambuf::gbump
      basic_streambuf::setg
      Coloque área
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      Put area
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      basic_streambuf::xsputn
      basic_streambuf::overflow
      basic_streambuf::pbase
      basic_streambuf::pptr
      basic_streambuf::epptr
      basic_streambuf::pbump
      basic_streambuf::setp
      Putback
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      Putback
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      basic_streambuf::pbackfail
       
      <tbody> </tbody>
      int_type uflow();
      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)
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      (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().
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      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.
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      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

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      Motivo: sem exemplo

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