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std::basic_istream::basic_istream

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< cpp‎ | io‎ | basic istream

 
 
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_istream
Les objets globaux
Original:
Global objects
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cin
wcin
Les fonctions membres
Original:
Member functions
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basic_istream::basic_istream
basic_istream::~basic_istream
basic_istream::operator= (C++11)
Entrée formaté
Original:
Formatted input
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basic_istream::operator>>
Entrée non formaté
Original:
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
Positionnement
Original:
Positioning
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basic_istream::tellg
basic_istream::seekg
Divers
Original:
Miscellaneous
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basic_istream::sync
basic_istream::swap (C++11)
Classes de membres
Original:
Member classes
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basic_istream::sentry
Tiers fonctions
Original:
Non-member functions
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operator>>(std::basic_istream)
 
explicit basic_istream( std::basic_streambuf<CharT,Traits>* sb);
(1)
protected:
basic_istream( const basic_istream& rhs ) = delete;
(2)
protected:
basic_istream( basic_istream&& rhs );
(3) (depuis C++11)
1)
Construit l'objet basic_istream, en assignant des valeurs initiales pour la classe de base en appelant basic_ios::init(sb). La valeur de gcount() est initialisé à zéro .
Original:
Constructs the basic_istream object, assigning initial values to the base class by calling basic_ios::init(sb). The value of gcount() is initialized to zero.
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2)
Le constructeur de copie est protégé, et est supprimé. Flux d'entrée ne sont pas copiable .
Original:
The copy constructor is protected, and is deleted. Input streams are not copyable.
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3)
Le constructeur mouvement copie la valeur de gcount() de rhs, définit la gcount () la valeur de RHS à zéro, et basic_ios<charT, traits>::move(rhs) utilise pour déplacer tous les éléments basic_ios, à l'exception de la rdbuf(), de rhs en *this. Ce constructeur mouvement est protégé: il est appelé par les constructeurs de mobiles se déplacent classes de flux d'entrée et de std::basic_ifstream std::basic_istringstream, qui savent correctement déplacer le streambuffer associé .
Original:
The move constructor copies the value of gcount() from rhs, sets the gcount() value of rhs to zero, and uses basic_ios<charT, traits>::move(rhs) to move all basic_ios members, except for the rdbuf(), from rhs into *this. This move constructor is protected: it is called by the move constructors of movable input stream classes std::basic_ifstream and std::basic_istringstream, which know how to correctly move the associated streambuffer.
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[modifier] Paramètres

sb -
streambuffer à utiliser comme périphérique sous-jacent
Original:
streambuffer to use as underlying device
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[modifier] Exemple

#include <sstream>
#include <iostream>
int main()
{
    std::istringstream s1("hello");
    std::istream s2(s1.rdbuf());                        // OK: s2 shares the buffer with s1
 
//    std::istream s3(std::istringstream("test"));      // ERROR: move constructor is protected
//    std::istream s4(s2);                              // ERROR: copy constructor is deleted
    std::istringstream s5(std::istringstream("world")); // OK: move ctor called by derived class
 
    std::cout << s2.rdbuf() << ' ' << s5.rdbuf() << '\n';
}

Résultat :

hello world