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std::basic_filebuf::swap

Da cppreference.com.
< cpp‎ | io‎ | basic filebuf

 
 
Ingresso / libreria di output
I / O manipolatori
C-style I / O
Buffer
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf(deprecato)
Streams
Original:
Streams
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Astrazioni
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
File I / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
String I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Array I / O
Original:
Array I/O
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istrstream(deprecato)
ostrstream(deprecato)
strstream(deprecato)
Tipi
Original:
Types
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streamoff
streamsize
fpos
Errore categoria interfaccia
Original:
Error category interface
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iostream_category(C++11)
io_errc(C++11)
 
std::basic_filebuf
Funzioni membro pubbliche
Original:
Public member functions
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basic_filebuf::basic_filebuf
basic_filebuf::~basic_filebuf
basic_filebuf::operator=(C++11)
basic_filebuf::swap(C++11)
basic_filebuf::is_open
basic_filebuf::open
basic_filebuf::close
Protetto funzioni membro
Original:
Protected member functions
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basic_filebuf::showmanyc
basic_filebuf::underflow
basic_filebuf::uflow
basic_filebuf::pbackfail
basic_filebuf::overflow
basic_filebuf::setbuf
basic_filebuf::seekoff
basic_filebuf::seekpos
basic_filebuf::sync
basic_filebuf::imbue
Non membri funzioni
Original:
Non-member functions
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swap(std::basic_filebuf)(C++11)
 
void swap( std::basic_filebuf& rhs )
(dal C++11)
Scambia lo stato e il contenuto di *this e rhs.
Original:
Swaps the state and the contents of *this and rhs.
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Indice

[modifica] Parametri

rhs -
un altro basic_filebuf
Original:
another basic_filebuf
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[modifica] Valore di ritorno

(Nessuno)
Original:
(none)
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[modifica] Note

Questa funzione viene chiamata automaticamente quando si sostituiscono oggetti std::fstream, raramente è necessario chiamare direttamente.
Original:
This function is called automatically when swapping std::fstream objects, it is rarely necessary to call it directly.
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[modifica] Esempio

#include <fstream>
#include <string>
#include <iostream>
 
int main()
{
 
    std::ifstream fin("test.in"); // read-only
    std::ofstream fout("test.out"); // write-only
 
    std::string s;
    getline(fin, s);
    std::cout << s << '\n'; // outputs the first line of test.in
 
    fin.rdbuf()->swap(*fout.rdbuf()); //swap the underlying buffers
 
    getline(fin, s); // fails: cannot read from a write-only filebuf
    std::cout << s << '\n'; // prints empty line
 
}


[modifica] Vedi anche

(C++11)
assegna un oggetto basic_filebuf
Original:
assigns a basic_filebuf object
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(membro pubblico funzione) [edit]
specializzata l'algoritmo std::swap
Original:
specializes the std::swap algorithm
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(funzione di modello) [edit]
(C++11)
Scambia due flussi di file
Original:
swaps two file streams
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(membro pubblico of std::basic_fstream funzione) [edit]