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      std::basic_ostream::sentry

      Da cppreference.com
      < cpp‎ | io‎ | basic ostream

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      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_ostream
      Objetos globais
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      Global objects
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      Funções de membro
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      Member functions
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      basic_ostream::basic_ostream
      basic_ostream::~basic_ostream
      basic_ostream::operator=(C++11)
      Entrada formatada
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      Formatted input
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      basic_ostream::operator<<
      Entrada não formatado
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      Unformatted input
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      basic_ostream::put
      basic_ostream::write
      Posicionamento
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      Positioning
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      basic_ostream::tellp
      basic_ostream::seekp
      Diversos
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      Miscellaneous
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      basic_ostream::flush
      basic_ostream::swap(C++11)
      Aulas-Membros
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      Member classes
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      basic_ostream::sentry
      Não-membros funções
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      Non-member functions
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      basic_ostream::sentry
      Funções
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      Functions
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      sentry::sentry
      sentry::operator bool
       
      Definido no cabeçalho <ostream>
      template<class CharT, class Traits =std::char_traits<CharT>>
      classstd::basic_istream<charT,traits>::sentry
      Um objeto da classe basic_ostream::sentry é construído em âmbito local, no início de cada função de membro de std::basic_ostream que realiza a saída (ambos formatados e não formatados). Seu construtor prepara o fluxo de saída: verifica se o fluxo já está em um estado falido, libera o empate () 'd fluxos de saída, e executa outras tarefas de execução definidos, se necessário. Definido pela implementação de limpeza, bem como a lavagem da corrente de saída, se necessário, é realizada no processo de destruição, de modo que é garantido que aconteceria se excepções são lançados durante a saída.
      Original:
      An object of class basic_ostream::sentry is constructed in local scope at the beginning of each member function of std::basic_ostream that performs output (both formatted and unformatted). Its constructor prepares the output stream: checks if the stream is already in a failed state, flushes the tie()'d output streams, and performs other implementation-defined tasks if necessary. Implementation-defined cleanup, as well as flushing of the output stream if necessary, is performed in the destructor, so that it is guaranteed to happen if exceptions are thrown during output.
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      [editar]Funções de membro

      constrói o object.
      All sentinela as tarefas de preparação é feito aqui
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      constructs the sentry object.
      All the preparation tasks are done here
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      (função pública membro)[edit]
      finaliza o objeto de fluxo após saída formatada ou depois de exceção, se for necessário
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      finalizes the stream object after formatted output or after exception, if necessary
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      (função pública membro)
      operator=
      o operador de atribuição é excluído
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      the assignment operator is deleted
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      (função pública membro)
      verifica se a preparação de objeto de fluxo foi bem sucedida
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      checks if the preparation of the stream object was successful
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      (função pública membro)[edit]

      [editar]Exemplo

      Esta seção está incompleta
      Motivo: sem exemplo


      [editar]Veja também

      insere dados formatados
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      inserts formatted data
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      (função pública membro)[edit]
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