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std::ios_base — cppreference.com

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<ios>

class ios_base;

Le ios_base classe est une classe polyvalente qui sert de classe de base pour toutes les classes de flux d'E / S. Il maintient plusieurs types de données:

Original:

The class ios_base is a multipurpose class that serves as the base class for all I/O stream classes. It maintains several kinds of data:

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1)

informations d'état: indicateurs d'état des cours d'eau

Original:

state information: stream status flags

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2)

informations de contrôle: indicateurs qui contrôlent la mise en forme à la fois d'entrée et de sortie des séquences et les paramètres régionaux imprégnée

Original:

control information: flags that control formatting of both input and output sequences and the imbued locale

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3)

stockage privé: indexé structure extensible qui permet à la fois de données long et les membres void*, qui peut être mis en œuvre sous forme de deux tableaux de longueur arbitraire ou un tableau de deux éléments struct ou un autre récipient .

Original:

private storage: indexed extensible data structure that allows both long and void* members, which may be implemented as two arbitrary-length arrays or a single array of two-element structs or another container.

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4)

rappels: nombre arbitraire de fonctions définies par l'utilisateur pour être appelés à partir imbue (), copyfmt (), et ~ ios_base ()

Original:

callbacks: arbitrary number of user-defined functions to be called from imbue(), copyfmt(), and ~ios_base()

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Mise en œuvre typique détient constantes membre correspondant à toutes les valeurs de fmtflags, iostate, openmode et seekdir-dessous, les variables membres pour maintenir la précision actuelle, la largeur et codes de formatage, le masque d'exception, l'état d'erreur de tampon, un conteneur redimensionnable la tenue des rappels, de la locale courante imprégné, le stockage privé, et une variable statique entier pour xalloc () .

Original:

Typical implementation holds member constants corresponding to all values of fmtflags, iostate, openmode, and seekdir shown below, member variables to maintain current precision, width, and formatting flags, the exception mask, the buffer error state, a resizeable container holding the callbacks, the currently imbued locale, the private storage, and a static integer variable for xalloc().

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Fonctions membres

Construit l'objet

Original:

constructs the object

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(fonction membre protégée) [edit]

[

virtuel

Original:

virtual

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Détruit l'objet

Original:

destructs the object

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(function membre virtuelle publique) [edit]

Mise en forme

Original:

Formatting

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gère indicateurs de format

Original:

manages format flags

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(fonction membre publique) [edit]

active l'indicateur de format spécifique

Original:

sets specific format flag

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(fonction membre publique) [edit]
clears specific format flag
(fonction membre publique) [edit]

gère précision décimale des opérations en virgule flottante

Original:

manages decimal precision of floating point operations

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(fonction membre publique) [edit]
manages field width
(fonction membre publique) [edit]

Locales

Original:

Locales

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fixe locale

Original:

sets locale

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(fonction membre publique) [edit]

retourne localisation en cours

Original:

returns current locale

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(fonction membre publique) [edit]

Interne gamme extensible

Original:

Internal extensible array

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[

statique

Original:

static

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]

renvoie un entier ensemble du programme unique qui est sûr à utiliser comme indice de motpasse () et iword ()

Original:

returns a program-wide unique integer that is safe to use as index to pword() and iword()

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(fonction membre publique statique) [edit]

redimensionne le stockage privé et le cas échéant un accès à l'élément de long à l'index donné

Original:

resizes the private storage if necessary and access to the long element at the given index

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(fonction membre publique) [edit]

redimensionne le stockage privé et le cas échéant un accès à l'élément de void* à l'index donné

Original:

resizes the private storage if necessary and access to the void* element at the given index

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(fonction membre publique) [edit]

Divers

Original:

Miscellaneous

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enregistre fonction de rappel d'événement

Original:

registers event callback function

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(fonction membre publique) [edit]

[

statique

Original:

static

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]

définit si le C + + et C des bibliothèques d'entrées-sorties sont interopérables

Original:

sets whether C++ and C IO libraries are interoperable

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(fonction membre publique statique) [edit]

Classes de membres

Original:

Member classes

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exception ruisseau

Original:

stream exception

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(classe membre publique) [edit]

initialise les objets de flux standard

Original:

initializes standard stream objects

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(classe membre publique) [edit]

Types de membres et de constantes

Original:

Member types and constants

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Type d'

Original:

Type

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 Explanation

type de mode de flux ouvert Les constantes suivantes sont également définis:

Original:

stream open mode type The following constants are also defined:

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Constante

Original:

Constant

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 Explanation[edit]
app

demander à l'extrémité du flux avant chaque écriture

Original:

seek to the end of stream before each write

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[edit]
binary

ouvrir en mode binaire

Original:

open in binary mode

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[edit]
in

ouvrir en lecture

Original:

open for reading

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[edit]
out

ouvrir en écriture

Original:

open for writing

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[edit]
trunc

jeter le contenu du courant lors de l'ouverture

Original:

discard the contents of the stream when opening

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[edit]
ate

demander à l'extrémité du flux immédiatement après ouverture

Original:

seek to the end of stream immediately after open

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[edit]

(typedef) [edit]

la mise en forme des drapeaux de type Les constantes suivantes sont également définis:

Original:

formatting flags type The following constants are also defined:

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Constante

Original:

Constant

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 Explanation[edit]
dec

utiliser la base décimale pour l'entier I / O

Original:

use decimal base for integer I/O

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[edit]
oct

utiliser octal de base pour l'entier I / O

Original:

use octal base for integer I/O

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[edit]
hex

utiliser la base hexadécimale entier I / O

Original:

use hexadecimal base for integer I/O

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[edit]
basefield

dec|oct|hex|0. Utile pour masquer les opérations

Original:

dec|oct|hex|0. Useful for masking operations

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[edit]
left

réglage gauche (ajoute des caractères de remplissage à droite)

Original:

left adjustment (adds fill characters to the right)

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[edit]
right

réglage de droite (ajoute des caractères de remplissage à gauche)

Original:

right adjustment (adds fill characters to the left)

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[edit]
internal

ajustement interne (ajoute des caractères de remplissage au point interne désignée)

Original:

internal adjustment (adds fill characters to the internal designated point)

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adjustfield

left|right|internal. Utile pour masquer les opérations

Original:

left|right|internal. Useful for masking operations

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[edit]
scientific

générer des types virgule flottante en utilisant la notation scientifique, ou une notation hexadécimale s'il est combiné avec fixe

Original:

generate floating point types using scientific notation, or hex notation if combined with fixed

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[edit]
fixed

générer des types virgule flottante en utilisant la notation fixe ou notation hexadécimale si elle est combinée avec les scientifiques

Original:

generate floating point types using fixed notation, or hex notation if combined with scientific

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[edit]
floatfield

scientific|fixed|(scientific|fixed)|0. Utile pour masquer les opérations

Original:

scientific|fixed|(scientific|fixed)|0. Useful for masking operations

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[edit]
boolalpha

insérer et d'extraire de type bool au format alphanumérique

Original:

insert and extract bool type in alphanumeric format

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[edit]
showbase

générer un préfixe indiquant la base numérique pour la sortie de nombre entier, nécessitent l'indicateur monnaie monétaire I / O

Original:

generate a prefix indicating the numeric base for integer output, require the currency indicator in monetary I/O

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[edit]
showpoint

générer un caractère point décimal sans condition pour la sortie de nombre à virgule flottante

Original:

generate a decimal-point character unconditionally for floating-point number output

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[edit]
showpos

générer un caractère + pour les non-négative de sortie numérique

Original:

generate a + character for non-negative numeric output

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[edit]
skipws

sauter espaces en tête avant les opérations d'entrée de certains

Original:

skip leading whitespace before certain input operations

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[edit]
unitbuf

rincer la sortie après chaque opération de sortie

Original:

flush the output after each output operation

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[edit]
uppercase

remplacer certaines lettres minuscules avec leurs uppercase
equivalents dans certaines opérations de sortie de sortie

Original:

replace certain lowercase letters with their uppercase
equivalents in certain output output operations

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[edit]

(typedef) [edit]

état du type de flux Les constantes suivantes sont également définis:

Original:

state of the stream type The following constants are also defined:

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Constante

Original:

Constant

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 Explanation[edit]
goodbit

pas d'erreur

Original:

no error

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[edit]
badbit

erreur de flux irrécupérables

Original:

irrecoverable stream error

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[edit]
failbit

d'entrée / sortie de l'opération a échoué (erreur de formatage ou d'extraction)

Original:

input/output operation failed (formatting or extraction error)

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[edit]
eofbit

séquence d'entrée associé a atteint la fin de fichier

Original:

associated input sequence has reached end-of-file

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(typedef) [edit]

cherchant type de direction Les constantes suivantes sont également définis:

Original:

seeking direction type The following constants are also defined:

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Constante

Original:

Constant

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 Explanation[edit]
beg

le début d'un flux

Original:

the beginning of a stream

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[edit]
end

la fin d'un cours d'eau

Original:

the ending of a stream

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[edit]
cur

la position actuelle de l'indicateur de position courant

Original:

the current position of stream position indicator

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[edit]

(typedef) [edit]

spécifie le type d'événement

Original:

specifies event type

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(enum) [edit]

callback type de fonction

Original:

callback function type

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(typedef) [edit]

Obsolète types de membres

Original:

Deprecated member types

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Type d'

Original:

Type

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 Explanation
io_state (obsolète)

type entier qui peut être utilisé comme iostate

Original:

integer type that may be used like iostate

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open_mode (obsolète)

type entier qui peut être utilisé comme openmode

Original:

integer type that may be used like openmode

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seek_dir (obsolète)

type entier qui peut être utilisé comme seekdir

Original:

integer type that may be used like seekdir

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streamoff (obsolète)

type non spécifié qui peut être utilisé comme off_type, pas nécessairement std::streamoff

Original:

unspecified type that may be used like off_type, not necessarily std::streamoff

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streampos (obsolète)

type non spécifié qui peut être utilisé comme pos_type, pas nécessairement std::streampos

Original:

unspecified type that may be used like pos_type, not necessarily std::streampos

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