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std::basic_ios::bad

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< cpp‎ | io‎ | basic ios

 
 
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_ios
Les fonctions membres
Original:
Member functions
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basic_ios::basic_ios
basic_ios::~basic_ios
Fonctions de l'État
Original:
State functions
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basic_ios::good
basic_ios::eof
basic_ios::fail
basic_ios::bad
basic_ios::operator!
basic_ios::operator bool
basic_ios::rdstate
basic_ios::setstate
basic_ios::clear
Mise en forme
Original:
Formatting
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basic_ios::copyfmt
basic_ios::fill
Divers
Original:
Miscellaneous
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basic_ios::exceptions
basic_ios::imbue
basic_ios::rdbuf
basic_ios::tie
basic_ios::narrow
basic_ios::widen
Protégé fonctions membres
Original:
Protected member functions
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basic_ios::init
basic_ios::move
basic_ios::swap
basic_ios::set_rdbuf
 
bool bad() const;
Retours true si erreur non récupérable s'est produite sur le flux associé. Plus précisément, les rendements true si badbit est situé dans rdstate() .
Original:
Returns true if non-recoverable error has occurred on the associated stream. Specifically, returns true if badbit is set in rdstate().
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La bibliothèque standard définit BadBit dans les situations suivantes:
Original:
The standard library sets badbit in the following situations:
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  • L'insertion dans le flux de sortie par put () ou write () échoue pour une raison quelconque .
    Original:
    Insertion into the output stream by put() or write() fails for any reason.
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  • L'insertion dans le flux de sortie par << opérateur, std::put_money ou std::put_time, n'a pas pu terminer parce que la fin du flux de sortie a été atteint (fonction La facette de formatage de sortie tels que num_put::put() ou money_put::put(), retourne un itérateur iter tels que iter.failed()==true)
    Original:
    Insertion into the output stream by << opérateur, std::put_money or std::put_time, could not complete because the end of the output stream was reached (The facet's formatting output function such as num_put::put() or money_put::put(), returns an iterator iter such that iter.failed()==true)
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  • Stream est construit avec un pointeur NULL pour rdbuf (), ou putback () / unget () est appelée sur un ruisseau avec un rdbuf nulle (), ou un pointeur NULL passé à l'opérateur << (* basic_streambuf)
    Original:
    Stream is constructed with a null pointer for rdbuf(), or putback()/unget() is called on a stream with a null rdbuf(), or a null pointer passed to operator<<(basic_streambuf*)
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  • rdbuf () -> sputbackc () ou rdbuf () -> sungetc () de retour traits :: eof () à putback () ou unget ()
    Original:
    rdbuf()->sputbackc() or rdbuf()->sungetc() return traits::eof() to putback() or unget()
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  • rdbuf () -> pubsync () retourne -1 pour synchroniser (), pour flush (), ou le destructeur de ostream :: sentinelle sur un flux unitbuf
    Original:
    rdbuf()->pubsync() returns -1 to sync(), to flush(), or to the destructor of ostream::sentry on a unitbuf stream
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  • Exception est levée au cours d'une opération d'E / S par une fonction membre de la mémoire tampon de flux associé (par exemple sbumpc (), xsputn (), sgetc (), de trop-plein (), etc)
    Original:
    Exception is thrown during an I/O operation by any member function of the associated stream buffer (e.g. sbumpc(), xsputn(), sgetc(), overflow(), etc)
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  • Exception est levée dans iword () ou motpasse () (par exemple std :: bad_alloc)
    Original:
    Exception is thrown in iword() or pword() (e.g. std::bad_alloc)
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Sommaire

[modifier] Paramètres

(Aucun)
Original:
(none)
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[modifier] Retourne la valeur

true si une erreur irrécupérable s'est produite, false autrement .
Original:
true if a non-recoverable error has occurred, false otherwise.
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[modifier] Exemple

[edit]
#include <iostream>
#include <fstream>
#include <cstdlib>
int main()
{
    std::ifstream file("test.txt");
    if(!file)  // operator! is used here
    {  
        std::cout << "File opening failed\n";
        return EXIT_FAILURE;
    }
 
    // typical C++ I/O loop uses the return value of the I/O function
    // as the loop controlling condition, operator bool() is used here
    for(int n; file >> n; ) {
       std::cout << n << ' ';
    }
    std::cout << '\n';
 
    if (file.bad())
        std::cout << "I/O error while reading\n";
    else if (file.eof())
        std::cout << "End of file reached successfully\n";
    else if (file.fail())
        std::cout << "Non-integer data encountered\n";
}


[modifier] Voir aussi

ios_base::iostate flags basic_ios accessors
eofbit failbit badbit good() fail() bad() eof() operator bool() operator!()
false false false true false false false true false
false false true false true true false false true
false true false false true false false false true
false true true false true true false false true
true false false false false false true true false
true false true false true true true false true
true true false false true false true false true
true true true false true true true false true