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std::basic_istream::peek

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< cpp‎ | io‎ | basic istream

 
 
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_istream
Objetos globais
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Global objects
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cin
wcin
Funções de membro
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Member functions
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basic_istream::basic_istream
basic_istream::~basic_istream
basic_istream::operator=(C++11)
Entrada formatada
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Formatted input
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basic_istream::operator>>
Entrada não formatado
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Unformatted input
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basic_istream::get
basic_istream::peek
basic_istream::unget
basic_istream::putback
basic_istream::getline
basic_istream::ignore
basic_istream::read
basic_istream::readsome
basic_istream::gcount
Posicionamento
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Positioning
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basic_istream::tellg
basic_istream::seekg
Diversos
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Miscellaneous
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basic_istream::sync
basic_istream::swap(C++11)
Aulas-Membros
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Member classes
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basic_istream::sentry
Não-membros funções
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Non-member functions
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operator>>(std::basic_istream)
 
int_type peek();
Se comporta como UnformattedInputFunction. Depois de construir e testar o objeto de sentinela, lê o próximo caractere do fluxo de entrada sem extraí-lo.
Original:
Behaves as UnformattedInputFunction. After constructing and testing the sentry object, reads the next character from the input stream without extracting it.
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Índice

[editar] Parâmetros

(Nenhum)
Original:
(none)
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[editar] Valor de retorno

Se good() == true, retorna o próximo caractere como obtido por rdbuf()->sgetc()
Original:
If good() == true, returns the next character as obtained by rdbuf()->sgetc()
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Caso contrário, retorna Traits::eof().
Original:
Otherwise, returns Traits::eof().
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[editar] Exemplo

#include <sstream>
#include <iostream>
int main()
{
    std::istringstream s1("Hello, world.");
    char c1 = s1.peek();
    char c2 = s1.get();
    std::cout << "Peeked: " << c1 << " got: " << c2 << '\n';
}

Output:

Peeked: H got: H

[editar] Veja também

extratos personagens
Original:
extracts characters
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(função pública membro) [edit]
unextracts um personagem
Original:
unextracts a character
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(função pública membro) [edit]