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std::basic_stringbuf::str

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< cpp‎ | io‎ | basic stringbuf

 
 
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_stringbuf
Fonctions membres publiques
Original:
Public member functions
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basic_stringbuf::basic_stringbuf
basic_stringbuf::operator= (C++11)
basic_stringbuf::swap (C++11)
basic_stringbuf::str
Protégé fonctions membres
Original:
Protected member functions
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basic_stringbuf::underflow
basic_stringbuf::pbackfail
basic_stringbuf::overflow
basic_stringbuf::setbuf
basic_stringbuf::seekoff
basic_stringbuf::seekpos
Tiers fonctions
Original:
Non-member functions
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swap(std::basic_stringbuf) (C++11)
 
std::basic_string<CharT, Traits, Allocator> str() const;
(1)
void str( const std::basic_string<CharT, Traits, Allocator>& s);
(2)
Obtient et définit la chaîne sous-jacente .
Original:
Gets and sets the underlying string.
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1)
Crée et retourne un objet std::basic_string contenant une copie de cette séquence std::basic_stringbuf le caractère sous-jacent. Pour l'entrée-seulement les flux, la chaîne retournée contient les caractères de l'[eback(), egptr()) gamme. Pour les flux d'entrée / sortie ou de sortie uniquement, contient les caractères de pbase() le dernier caractère de la séquence indépendamment de egptr() et epptr() .
Original:
Creates and returns a std::basic_string object containing a copy of this std::basic_stringbuf's underlying character sequence. For input-only streams, the returned string contains the characters from the range [eback(), egptr()). For input/output or output-only streams, contains the characters from pbase() to the last character in the sequence regardless of egptr() and epptr().
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2)
Supprime la séquence de caractères entier sous-jacente de cette std::basic_stringbuf puis configure une nouvelle séquence de caractères sous-jacent contenant une copie du contenu de s. Les pointeurs de std::basic_streambuf sont initialisées comme suit:
Original:
Deletes the entire underlying character sequence of this std::basic_stringbuf and then configures a new underlying character sequence containing a copy of the contents of s. The pointers of std::basic_streambuf are initialized as follows:
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Pour les flux d'entrée (mode & ios_base::in == true), eback() points au premier caractère, gptr() == eback() et egptr() == eback() + s.size(): l'entrée suivante va lire le premier caractère copié à partir s .
Original:
For input streams (mode & ios_base::in == true), eback() points at the first character, gptr() == eback(), and egptr() == eback() + s.size(): the subsequent input will read the first character copied from s.
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Pour les flux de sortie (mode & ios_base::out == true), pbase() points au premier caractère et epptr() >= pbase() + s.size() (epptr est autorisé à pointer loin pour que le sputc() suivante serait pas immédiatement overflow())
Original:
For output streams (mode & ios_base::out == true), pbase() points at the first character and epptr() >= pbase() + s.size() (epptr is allowed to point farther so that the following sputc() wouldn't immediately call overflow())
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Pour les flux append (mode & ios_base::ate == true), pptr() == pbase() + s.size(), de sorte que la sortie suivante sera ajouté au dernier caractère copié à partir s (depuis C++11)
Original:
For append streams (mode & ios_base::ate == true), pptr() == pbase() + s.size(), so that subsequent output will be appended to the last character copied from s (depuis C++11)
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Pour aucun-ajout flux de sortie, pptr() == pbase(), de sorte que la production subséquente écrasera les caractères copiés à partir s .
Original:
For no-appending output streams, pptr() == pbase(), so that subsequent output will overwrite the characters copied from s.
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Sommaire

[modifier] Paramètres

s -
un objet chaîne de caractères contenant la séquence de caractères de remplacement
Original:
a string object holding the replacement character sequence
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[modifier] Retourne la valeur

1)
Un objet chaîne contenant une copie de cette séquence tampon de caractère sous-jacent .
Original:
A string object holding a copy of this buffer's underlying character sequence.
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2)
(Aucun)
Original:
(none)
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[modifier] Notes

Cette fonction est généralement accessible via std::basic_stringstream::str() .
Original:
This function is typically accessed through std::basic_stringstream::str().
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[modifier] Exemple

#include <sstream>
#include <iostream>
int main()
{
    int n;
 
    std::istringstream in;  // could also use in("1 2")
    in.rdbuf()->str("1 2"); // set the get area
    in >> n;
    std::cout << "after reading the first int from \"1 2\", the int is " 
              << n << ", str() = \"" << in.rdbuf()->str() << "\"\n"; // or in.str()
 
    std::ostringstream out("1 2");
    out << 3;
    std::cout << "after writing the int '3' to output stream \"1 2\""
              << ", str() = \"" << out.str() << "\"\n";
 
    std::ostringstream ate("1 2", std::ios_base::ate); // C++11
    ate << 3;
    std::cout << "after writing the int '3' to append stream \"1 2\""
              << ", str() = \"" << ate.str() << "\"\n";
}

Résultat :

after reading the first int from "1 2", the int is 1, str() = "1 2"
after writing the int '3' to output stream "1 2", str() = "3 2"
after writing the int '3' to append stream "1 2", str() = "1 23"

[modifier] Voir aussi

obtient ou définit le contenu de l'objet chaîne de périphérique sous-jacent
Original:
gets or sets the contents of underlying string device object
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(fonction membre publique de std::basic_stringstream) [edit]