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std::collate

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< cpp‎ | locale

 
 
Lokalisierungen Bibliothek
Locales und Facetten
Original:
Locales and facets
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locale
Buchstaben-Klassifikation
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Character classification
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Conversions
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Conversions
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Facet Kategorie Basisklassen
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Facet category base classes
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Facet Kategorien
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Facet categories
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Locale-spezifische Facetten
Original:
Locale-specific facets
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Code-Konvertierung Facetten
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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::collate
Member-Funktionen
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Member functions
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collate::collate
collate::~collate
collate::compare
collate::do_compare
collate::transform
collate::do_transform
collate::hash
collate::do_hash
 
Defined in header <locale>
template< class CharT >
class collate;
Klasse std::collate kapselt locale-spezifischen Zusammenstellung (Vergleich) und Hashing von Strings. Diese Facette durch std::basic_regex verwendet und können angewendet, mittels std::locale::operator() werden, direkt zu allen Standard-Algorithmen, die eine Zeichenfolge Vergleichsprädikat erwarten .
Original:
Class std::collate encapsulates locale-specific collation (comparison) and hashing of strings. This facet is used by std::basic_regex and can be applied, by means of std::locale::operator(), directly to all standard algorithms that expect a string comparison predicate.
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cpp/locale/locale/facetstd-collate-inheritance.svg
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Inheritance diagram

Zwei Spezialisierungen werden durch die Standard-Bibliothek zur Verfügung gestellt und werden von allen locale Objekte in einem C + +-Programm erstellt implementiert:
Original:
Two specializations are provided by the standard library and are implemented by all locale objects created in a C++ program:
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Defined in header <locale>
std::collate<char>
Geräte lexikographische Ordnung der Byte-Strings
Original:
implements lexicographical ordering of byte strings
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std::collate<wchar_t>
Geräte lexikographische Ordnung der breiten Strings
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implements lexicographical ordering of wide strings
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Inhaltsverzeichnis

[Bearbeiten] Mitglied Typen

Mitglied Typ
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Member type
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Definition
char_type charT
string_type std::basic_string<charT>

[Bearbeiten] Member-Funktionen

baut eine neue Sortierfunktion Facette
Original:
constructs a new collate facet
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(öffentliche Elementfunktion)
zerstört sich eine Sortierfunktion Facette
Original:
destructs a collate facet
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(geschützt Member-Funktion)
Beruft do_compare
Original:
invokes do_compare
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(öffentliche Elementfunktion) [edit]
Beruft do_transform
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invokes do_transform
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(öffentliche Elementfunktion) [edit]
Beruft do_hash
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invokes do_hash
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(öffentliche Elementfunktion) [edit]

[Bearbeiten] Mitglied widerspricht

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

[Bearbeiten] Geschützt Member-Funktionen

[virtuell]
vergleicht zwei Strings mit dieser Facette der Kollatierung Regeln
Original:
compares two strings using this facet's collation rules
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(virtuellen geschützten Member-Funktion) [edit]
[virtuell]
wandelt einen String, so dass collation durch Vergleich ersetzt werden können
Original:
transforms a string so that collation can be replaced by comparison
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(virtuellen geschützten Member-Funktion) [edit]
[virtuell]
erzeugt einen Integer-Hash-Wert mit dieser Facette der Kollatierung Regeln
Original:
generates an integer hash value using this facet's collation rules
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(virtuellen geschützten Member-Funktion) [edit]

[Bearbeiten] Beispiel

#include <locale>
#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
int main()
{
    std::wcout.imbue(std::locale(""));
    std::vector<std::wstring> v = {L"ar", L"zebra", L"\u00f6grupp", L"Zebra", L"\u00e4ngel",
                                   L"\u00e5r", L"f\u00f6rnamn"};
 
    std::wcout << "Default locale collation order: ";
    std::sort(v.begin(), v.end());
    for(auto s : v) std::wcout << s << ' '; std::wcout << '\n';
 
    std::wcout << "English locale collation order: ";
    std::sort(v.begin(), v.end(), std::locale("en_US.UTF-8"));
    for(auto s : v) std::wcout << s << ' '; std::wcout << '\n';
 
    std::wcout << "Swedish locale collation order: ";
    std::sort(v.begin(), v.end(), std::locale("sv_SE.UTF-8"));
    for(auto s : v) std::wcout << s << ' '; std::wcout << '\n';
}

Output:

Default locale collation order: Zebra ar förnamn zebra ängel år ögrupp
English locale collation order: ängel ar år förnamn ögrupp zebra Zebra
Swedish locale collation order: ar förnamn zebra Zebra år ängel ögrupp

[Bearbeiten] Siehe auch

lexicographically compares two strings using this locale's collate facet
(öffentliche Elementfunktion of std::locale) [edit]
schafft eine Sortierfunktion Facette für die benannte locale
Original:
creates a collate facet for the named locale
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(Klassen-Template)