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std::basic_ostream::sentry

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< cpp‎ | io‎ | basic ostream

 
 
De entrada / saída da biblioteca
I / O manipuladores
C estilo de I / O
Buffers
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Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(obsoleta)
Streams
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Streams
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Abstrações
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Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
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File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Cordas I / O
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String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Matriz de I / O
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Array I/O
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istrstream(obsoleta)
ostrstream(obsoleta)
strstream(obsoleta)
Tipos
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Types
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streamoff
streamsize
fpos
Interface de categoria de erro
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Error category interface
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iostream_category(C++11)
io_errc(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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operator<<(std::basic_ostream)
 
basic_ostream::sentry
Funções
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Functions
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sentry::sentry
sentry::operator bool
 
Defined in header <ostream>
template< class CharT, class Traits = std::char_traits<CharT> >
class std::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
Original:
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
Original:
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
Original:
the assignment operator is deleted
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(função pública membro)
verifica se a preparação de objeto de fluxo foi bem sucedida
Original:
checks if the preparation of the stream object was successful
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(função pública membro) [edit]

[editar] Exemplo


[editar] Veja também

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