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    std::char_traits

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    C++
     
    Strings Bibliothek
    Null-terminierte Strings
    Original:
    Null-terminated strings
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    Byte-Strings
    Multibyte-Strings
    Wide Strings
    Classes
    Original:
    Classes
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    basic_string
    char_traits
     
    std::char_traits
     
    definiert in Header <string>
    template<

        class CharT

    >class char_traits;
    Die char_traits Klasse definiert den Strom-und String-Betrieb Eigenschaften eines Charakter-Typ, wie die Typen für die Manipulation der Zeichen und Zeichenketten, sowie alle die gemeinsamen Operationen für den gegebenen Charakter-Typ verwendet .
    Original:
    The char_traits class defines the stream and string operation properties of a character type, such as the types used for manipulating the characters and character strings, as well as all the common operations for the given character type.
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    Es gibt Klassen-Template char_traits definiert, die als Grundlage für die explizite Instantiierung dient. Es erfüllt alle Anforderungen der Traits Konzept .
    Original:
    There is class template char_traits defined, which serves as a basis for explicit instantiations. It fulfills all requirements of Traits concept.
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    Auch mehrere Spezialisierungen für die meisten gängigen Arten von Zeichen, die das hat folgende Mitglieder festlegen definiert:
    Original:
    Also, several specializations are defined for most common character types which which has to specify the following members:
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    Instantiation char_typeint_typeoff_typepos_typestate_type
    char_traits<char>charintstreamoffstreamposmbstate_t
    char_traits<wchar_t>wchar_twint_twstreamoffwstreamposmbstate_t
    char_traits<char16_t>(C++11)char16_tint_least16_tstreamoffu16streamposmbstate_t
    char_traits<char32_t>(C++11)char32_tint_least32_tstreamoffu32streamposmbstate_t
    This section is incomplete
    Reason: simplify the description, emphasize that char_traits can be user defined

    Inhaltsverzeichnis

    [Bearbeiten]Mitglied Typen

    Type
    Original:
    Type
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    		 Definition
    char_typeCharT
    int_type
    ein Integer-Typ, der alle Werte des char_type halten kann und EOF
    Original:
    an integer type that can hold all values of char_type plus EOF
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    off_type
    Implementierung definiert
    Original:
    implementation-defined
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    pos_type
    Implementierung definiert
    Original:
    implementation-defined
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    state_type
    Implementierung definiert
    Original:
    implementation-defined
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    [Bearbeiten]Member-Funktionen

    [statisch]
    weist einen Charakter
    Original:
    assigns a character
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    (public static Elementfunktion)[edit]
    [statisch]
    vergleicht zwei Zeichen
    Original:
    compares two characters
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    (public static Elementfunktion)[edit]
    [statisch]
    bewegt sich ein Zeichenfolge auf eine andere
    Original:
    moves one character sequence onto another
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    (public static Elementfunktion)[edit]
    [statisch]
    kopiert eine Zeichenkette
    Original:
    copies a character sequence
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    (public static Elementfunktion)[edit]
    [statisch]
    lexikographisch vergleicht zwei Zeichenfolgen
    Original:
    lexicographically compares two character sequences
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    (public static Elementfunktion)[edit]
    [statisch]
    gibt die Länge einer Zeichensequenz
    Original:
    returns the length of a character sequence
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    (public static Elementfunktion)[edit]
    [statisch]
    		 finds a character in a character sequence
    (public static Elementfunktion)[edit]
    [statisch]
    wandelt int_type gleichwertige char_type
    Original:
    converts int_type to equivalent char_type
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    (public static Elementfunktion)[edit]
    [statisch]
    wandelt char_type gleichwertige int_type
    Original:
    converts char_type to equivalent int_type
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    (public static Elementfunktion)[edit]
    [statisch]
    vergleicht zwei int_type Werte
    Original:
    compares two int_type values
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    (public static Elementfunktion)[edit]
    [statisch]
    gibt ein eof Wert
    Original:
    returns an eof value
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    (public static Elementfunktion)[edit]
    [statisch]
    prüft, ob ein Zeichen eof Wert ist
    Original:
    checks whether a character is eof value
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    (public static Elementfunktion)[edit]

    [Bearbeiten]Beispiel

    Benutzer-definierte Zeichen Merkmale können verwendet werden, um case-insensitive comparison bereitzustellen
    Original:
    User-defined character traits may be used to provide case-insensitive comparison
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    #include <string>#include <iostream>#include <cctype>   struct ci_char_traits :public std::char_traits<char>{staticbool eq(char c1, char c2){returnstd::toupper(c1)==std::toupper(c2);}staticbool ne(char c1, char c2){returnstd::toupper(c1)!=std::toupper(c2);}staticbool lt(char c1, char c2){returnstd::toupper(c1)<std::toupper(c2);}staticint compare(constchar* s1, constchar* s2, size_t n){while( n--!=0){if(std::toupper(*s1)<std::toupper(*s2))return-1;if(std::toupper(*s1)>std::toupper(*s2))return1;++s1;++s2;}return0;}staticconstchar* find(constchar* s, int n, char a){while( n-->0&&std::toupper(*s)!=std::toupper(a)){++s;}return s;}};   typedefstd::basic_string<char, ci_char_traits> ci_string;   std::ostream& operator<<(std::ostream& os, const ci_string& str){return os.write(str.data(), str.size());}   int main(){ ci_string s1 ="Hello"; ci_string s2 ="heLLo";if(s1 == s2)std::cout<< s1 <<" and "<< s2 <<" are equal\n";}

    Output: 

    Hello and heLLo are equal

    [Bearbeiten]Siehe auch

    speichert und bearbeitet Sequenzen von Zeichen
    Original:
    stores and manipulates sequences of characters
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    (Klassen-Template)[edit]
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/string/char_traits&oldid=27905“
    close