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    std::ctype

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    <metanoindex/>

     
    C++
     
    Lokalisierungen Bibliothek
    Locales und Facetten
    Original:
    Locales and facets
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    locale
    Buchstaben-Klassifikation
    Original:
    Character classification
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    Conversions
    Original:
    Conversions
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    Facet Kategorie Basisklassen
    Original:
    Facet category base classes
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    Facet Kategorien
    Original:
    Facet categories
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    Locale-spezifische Facetten
    Original:
    Locale-specific facets
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    Code-Konvertierung Facetten
    Original:
    Code conversion facets
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    codecvt_utf8(C++11)
    codecvt_utf16(C++11)
    C locale
    Original:
    C locale
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    std::ctype
    Member-Funktionen
    Original:
    Member functions
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    ctype::ctype
    ctype::~ctype
    ctype::is
    ctype::do_is
    ctype::scan_id
    ctype::do_scan_id
    ctype::scan_not
    ctype::do_scan_not
    ctype::toupper
    ctype::do_toupper
    ctype::tolower
    ctype::do_tolower
    ctype::widen
    ctype::do_widen
    ctype::narrow
    ctype::do_narrow
     
    <tbody> </tbody>
    definiert in Header <locale>
    template< class CharT > class ctype;
    Klasse ctype kapselt Charakter Klassifizierung Funktionen. Alle Stream Input Operationen durch std::basic_istream<charT> durchgeführt verwenden std::ctype<charT> des Gebietsschemas in dem Strom Leerzeichen zur Eingabe tokenization identifizieren durchdrungen. Stream Output-Operationen gelten std::ctype<charT>::widen() zu schmalen Zeichen Argumente vor der Ausgabe .
    Original:
    Class ctype encapsulates character classification features. All stream input operations performed through std::basic_istream<charT> use the std::ctype<charT> of the locale imbued in the stream to identify whitespace characters for input tokenization. Stream output operations apply std::ctype<charT>::widen() to narrow-character arguments prior to output.
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    cpp/locale/ctype basecpp/locale/locale/facet

    Inheritance diagram

    Zwei Spezialisierungen werden durch die Standard-Bibliothek zur Verfügung gestellt
    Original:
    Two specializations are provided by the standard library
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    definiert in Header <locale>
    std::ctype<char>
    bietet Äquivalente des "C"-Locale Klassifizierung. Diese Spezialisierung verwendet Lookup-Tabelle für Zeichen Klassifizierung
    Original:
    provides equivalents of the "C" locale classification. This specialization uses table lookup for character classification
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    std::ctype<wchar_t>
    bietet Breitzeichen Äquivalente des "C"-Locale Klassifizierung
    Original:
    provides wide character equivalents of the "C" locale classification
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    Mitglied Typen

    Mitglied Typ
    Original:
    Member type
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    		 Definition
    char_type CharT

    Member-Funktionen
    baut eine neue ctype Facette
    Original:
    constructs a new ctype facet
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    (öffentliche Elementfunktion)
    zerstört sich eine ctype Facette
    Original:
    destructs a ctype facet
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    (geschützt Member-Funktion)
    Beruft do_is
    Original:
    invokes do_is
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    (öffentliche Elementfunktion) [edit]
    Beruft do_scan_is
    Original:
    invokes do_scan_is
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    (öffentliche Elementfunktion) [edit]
    Beruft do_scan_not
    Original:
    invokes do_scan_not
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    (öffentliche Elementfunktion) [edit]
    Beruft do_toupper
    Original:
    invokes do_toupper
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    (öffentliche Elementfunktion) [edit]
    Beruft do_tolower
    Original:
    invokes do_tolower
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    (öffentliche Elementfunktion) [edit]
    Beruft do_widen
    Original:
    invokes do_widen
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    (öffentliche Elementfunktion) [edit]
    Beruft do_narrow
    Original:
    invokes do_narrow
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    (öffentliche Elementfunktion) [edit]

    Geschützt Member-Funktionen

    [virtuell]
    stuft ein Zeichen oder eine Zeichenfolge
    Original:
    classifies a character or a character sequence
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    (virtuellen geschützten Member-Funktion) [edit]
    [virtuell]
    ortet das erste Zeichen in einer Sequenz, die zu bestimmten Klassifizierung entspricht
    Original:
    locates the first character in a sequence that conforms to given classification
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    (virtuellen geschützten Member-Funktion) [edit]
    [virtuell]
    findet das erste Zeichen in einer Sequenz, die givne Klassifizierung ausfällt
    Original:
    locates the first character in a sequence that fails givne classification
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    (virtuellen geschützten Member-Funktion) [edit]
    [virtuell]
    wandelt ein oder mehrere Zeichen in Großbuchstaben
    Original:
    converts a character or characters to uppercase
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    (virtuellen geschützten Member-Funktion) [edit]
    [virtuell]
    wandelt ein oder mehrere Zeichen in Kleinbuchstaben
    Original:
    converts a character or characters to lowercase
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    (virtuellen geschützten Member-Funktion) [edit]
    [virtuell]
    wandelt ein Zeichen oder Zeichen aus char um charT
    Original:
    converts a character or characters from char to charT
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    (virtuellen geschützten Member-Funktion) [edit]
    [virtuell]
    wandelt ein Zeichen oder Zeichen aus charT um char
    Original:
    converts a character or characters from charT to char
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    (virtuellen geschützten Member-Funktion) [edit]

    Mitglied widerspricht

    static std::locale::id id
    ID des Gebietsschemas
    Original:
    id of the locale
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    (öffentliche Member-Objekt)

    Inherited from std::ctype_base

    Member types

    Type
    Original:
    Type
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    		 Definition
    mask
    unbestimmte Bitmaske Typ (Aufzählung, Integer-Typ oder bitset)
    Original:
    unspecified bitmask type (enumeration, integer type, or bitset)
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    Member constants

    space
    [statisch]
    der Wert mask Identifizieren Leerzeichen Klassifizierung
    Original:
    the value of mask identifying whitespace character classification
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    (public static Mitglied konstanten)
    print
    [statisch]
    der Wert mask identifizieren druckbare Zeichen Klassifizierung
    Original:
    the value of mask identifying printable character classification
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    (public static Mitglied konstanten)
    cntrl
    [statisch]
    der Wert mask identifizieren Steuerzeichen Klassifizierung
    Original:
    the value of mask identifying control character classification
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    (public static Mitglied konstanten)
    upper
    [statisch]
    der Wert mask identifizieren Großbuchstaben Klassifizierung
    Original:
    the value of mask identifying uppercase character classification
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    (public static Mitglied konstanten)
    lower
    [statisch]
    der Wert mask identifizieren Kleinbuchstaben Klassifizierung
    Original:
    the value of mask identifying lowercase character classification
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    (public static Mitglied konstanten)
    alpha
    [statisch]
    der Wert mask identifizieren Buchstaben Klassifizierung
    Original:
    the value of mask identifying alphabetic character classification
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    (public static Mitglied konstanten)
    digit
    [statisch]
    der Wert mask identifizieren Ziffernzeichen Klassifizierung
    Original:
    the value of mask identifying digit character classification
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    (public static Mitglied konstanten)
    punct
    [statisch]
    der Wert mask identifizieren Satzzeichen Klassifizierung
    Original:
    the value of mask identifying punctuation character classification
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    (public static Mitglied konstanten)
    xdigit
    [statisch]
    der Wert mask identifizieren Hexadezimalziffer Charakter Klassifizierung
    Original:
    the value of mask identifying hexadecimal digit character classification
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    (public static Mitglied konstanten)
    blank
    [statisch] (C++11)
    der Wert mask identifizieren Leerzeichen Klassifizierung
    Original:
    the value of mask identifying blank character classification
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    (public static Mitglied konstanten)
    alnum
    [statisch]
    		 alpha | digit
    (public static Mitglied konstanten)
    graph
    [statisch]
    		 alnum | punct
    (public static Mitglied konstanten)

    Beispiel

    Das folgende Beispiel demonstriert Modifikation eines ctype andere als ctype <char> zu einer CSV-Datei tokenize
    Original:
    The following example demonstrates modification of a ctype other than ctype<char> to tokenize of a CSV file
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    #include <iostream>
#include <locale>
#include <sstream>
 
struct csv_whitespace : std::ctype<wchar_t> {
    bool do_is(mask m, char_type c) const
    {   
        if ((m & space) && c == L' ') {
            return false; // space will NOT be classified as whitespace
        }
        if ((m & space) && c == L',') {
            return true; // comma will be classified as whitespace
        }
        return ctype::do_is(m, c); // leave the rest to the parent class
    } 
};
 
int main()
{
    std::wstring in = L"Column 1,Column 2,Column 3\n123,456,789";
    std::wstring token;
 
    std::wcout << "default locale:\n";
    std::wistringstream s1(in);
    while (s1 >> token) {
        std::wcout << "  " << token << '\n';
    }
 
    std::wcout << "locale with modified ctype:\n";
    std::wistringstream s2(in);
    s2.imbue(std::locale(s2.getloc(), new csv_whitespace()));
    while (s2 >> token) {
        std::wcout << "  " << token<< '\n';
    }
}

    Output: 

    default locale:
  Column
  1,Column
  2,Column
  3
  123,456,789
locale with modified ctype:
  Column 1
  Column 2
  Column 3
  123
  456
  789

    Siehe auch
    Spezialisierung std::ctype für Typ char
    Original:
    specialization of std::ctype for type char
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    (class Template-Spezialisierung)
    definiert Charakter Klassifizierungskategorien
    Original:
    defines character classification categories
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    (Klassen-Template)
    schafft eine ctype Facette für die benannte locale
    Original:
    creates a ctype facet for the named locale
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    (Klassen-Template)