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std::basic_filebuf::swap

De cppreference.com
< cpp‎ | io‎ | basic filebuf

 
 
D'entrée / sortie de bibliothèque
I / O manipulateurs
C-style I / O
Tampons
Original:
Buffers
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basic_streambuf
basic_filebuf
basic_stringbuf
strstreambuf (obsolète)
Cours d'eau
Original:
Streams
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Abstractions
Original:
Abstractions
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ios_base
basic_ios
basic_istream
basic_ostream
basic_iostream
Fichier E / O
Original:
File I/O
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basic_ifstream
basic_ofstream
basic_fstream
Chaîne I / O
Original:
String I/O
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basic_istringstream
basic_ostringstream
basic_stringstream
Tableau I / O
Original:
Array I/O
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istrstream (obsolète)
ostrstream (obsolète)
strstream (obsolète)
Types
Original:
Types
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streamoff
streamsize
fpos
Interface catégorie d'erreur
Original:
Error category interface
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iostream_category (C++11)
io_errc (C++11)
 
std::basic_filebuf
Fonctions membres publiques
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
Protégé fonctions membres
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
Tiers fonctions
Original:
Non-member functions
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swap(std::basic_filebuf) (C++11)
 
void swap( std::basic_filebuf& rhs )
(depuis C++11)
Échanges de l'état et le contenu de *this et rhs .
Original:
Swaps the state and the contents of *this and rhs.
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Sommaire

[modifier] Paramètres

rhs -
basic_filebuf autre
Original:
another basic_filebuf
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[modifier] Retourne la valeur

(Aucun)
Original:
(none)
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[modifier] Notes

Cette fonction est appelée automatiquement quand vous échangez des objets std::fstream, il est rarement nécessaire de l'appeler directement .
Original:
This function is called automatically when swapping std::fstream objects, it is rarely necessary to call it directly.
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[modifier] Exemple

#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
 
}


[modifier] Voir aussi

(C++11)
assigne un objet basic_filebuf
Original:
assigns a basic_filebuf object
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(fonction membre publique) [edit]
l'algorithme spécialisé std::swap
Original:
specializes the std::swap algorithm
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(fonction générique) [edit]
(C++11)
swaps de deux flux de fichiers
Original:
swaps two file streams
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(fonction membre publique de std::basic_fstream) [edit]