std::basic_stringbuf::str

<metanoindex/>

 

C++

Linguaggio

Concetti

Libreria di Utilità

Stringhe

Contenitori

Algoritmi

Iteratori

Libreria matematca

Input/output

Localizzazione

Espressioni regolari (C++11)

Operazioni atomicche (C++11)

Multithreading (C++11)

 

Ingresso / libreria di output

I / O manipolatori

C-style I / O

Buffer Original: Buffers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_streambuf

basic_filebuf

basic_stringbuf

strstreambuf (deprecato)

Streams Original: Streams The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Astrazioni Original: Abstractions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

ios_base

basic_ios

basic_istream

basic_ostream

basic_iostream

File I / O Original: File I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_ifstream

basic_ofstream

basic_fstream

String I / O Original: String I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_istringstream

basic_ostringstream

basic_stringstream

Array I / O Original: Array I/O The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

istrstream (deprecato)

ostrstream (deprecato)

strstream (deprecato)

Tipi Original: Types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

streamoff

streamsize

fpos

Errore categoria interfaccia Original: Error category interface The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

iostream_category (C++11)

io_errc (C++11)

 

std::basic_stringbuf

Funzioni membro pubbliche Original: Public member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_stringbuf::basic_stringbuf

basic_stringbuf::operator= (C++11)

basic_stringbuf::swap (C++11)

basic_stringbuf::str

Protetto funzioni membro Original: Protected member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

basic_stringbuf::underflow

basic_stringbuf::pbackfail

basic_stringbuf::overflow

basic_stringbuf::setbuf

basic_stringbuf::seekoff

basic_stringbuf::seekpos

Non membri funzioni Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

swap(std::basic_stringbuf) (C++11)

 

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std::basic_string<CharT, Traits, Allocator> str() const;	(1)
void str( const std::basic_string<CharT, Traits, Allocator>& s);	(2)

Ottiene e imposta la stringa sottostante.

Original:

Gets and sets the underlying string.

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1)

Crea e restituisce un oggetto std::basic_string contenente una copia di questa sequenza di caratteri di base del std::basic_stringbuf. Per l'ingresso solo i flussi, la stringa restituita contiene i caratteri della [eback(), egptr()) gamma. Per i flussi di input / output o di sola scrittura, contiene i caratteri da pbase() all'ultimo carattere della sequenza, indipendentemente egptr() e 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)

Cancella l'intera sequenza di caratteri di fondo di questo std::basic_stringbuf e poi configura una nuova sequenza di caratteri di base contenente una copia del contenuto di s. I puntatori di std::basic_streambuf vengono inizializzate come segue:

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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Per i flussi di input (mode & ios_base::in == true), eback() punti al primo carattere, gptr() == eback(), e egptr() == eback() + s.size(): l'ingresso successivo leggerà il primo carattere copiato da 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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Per i flussi di uscita (mode & ios_base::out == true), pbase() punti al primo carattere e epptr() >= pbase() + s.size() (epptr è consentito al punto più lontano in modo che il sputc() seguente non chiamare immediatamente 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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Per i flussi di append (mode & ios_base::ate == true), pptr() == pbase() + s.size(), in modo che l'uscita successiva verrà aggiunto l'ultimo carattere copiato da s (dal 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 (dal C++11)

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Per nessun-aggiungendo i flussi in uscita, pptr() == pbase(), in modo che l'uscita successiva sovrascriverà i caratteri copiati da s.

Original:

For no-appending output streams, pptr() == pbase(), so that subsequent output will overwrite the characters copied from s.

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Parametri

s

-

un oggetto stringa contenente la sequenza di caratteri di sostituzione Original: a string object holding the replacement character sequence The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

1)

Un oggetto stringa in possesso di una copia della sequenza di caratteri di fondo di questa buffer.

Original:

A string object holding a copy of this buffer's underlying character sequence.

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2)

(Nessuno)

Original:

(none)

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Note

Questa funzione è in genere accessibile tramite std::basic_stringstream::str().

Original:

This function is typically accessed through std::basic_stringstream::str().

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Esempio

#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";
}

Output:

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"

Vedi anche

str	ottiene o imposta il contenuto di oggetto sottostante dispositivo stringa Original: gets or sets the contents of underlying string device object The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (metodo pubblico)