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    std::tuple

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    C++
     
    Utilities-Bibliothek
     
    std::tuple
    Member-Funktionen
    Original:
    Member functions
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    tuple::tuple
    tuple::operator=
    tuple::swap
    Non-Member-Funktionen
    Original:
    Non-member functions
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    make_tuple
    tie
    forward_as_tuple
    None
    operator=
    operator!=
    operator<
    operator<=
    operator>
    operator>=
    std::swap
    get
    Helper-Klassen
    Original:
    Helper classes
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    tuple_size
    tuple_element
    uses_allocator
    ignore
     
    definiert in Header <tuple>
    template<class... Types>
    class tuple;
    		(seit C++11)
    Das Klassentemplate std::tuple ist eine Collection fester Größe mit heterogenen Werte. Es ist die Verallgemeinerung von std::pair .
    Original:
    Class template std::tuple is a fixed-size collection of heterogeneous values. It is a generalization of std::pair.
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    Inhaltsverzeichnis

    [Bearbeiten]Member-Funktionen

    baut eine neue tuple
    Original:
    constructs a new tuple
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    (öffentliche Elementfunktion)
    ordnet den Inhalt eines tuple zum anderen
    Original:
    assigns the contents of one tuple to another
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    (öffentliche Elementfunktion)
    tauscht die Inhalte von zwei tuples
    Original:
    swaps the contents of two tuples
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    (öffentliche Elementfunktion)

    [Bearbeiten]Non-Member-Funktionen

    erzeugt eine tuple Objekt des Typs von den Argumenttypen definiert
    Original:
    creates a tuple object of the type defined by the argument types
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    (Funktions-Template)[edit]
    erzeugt ein tuple aus lvalue Referenzen oder entpackt ein Tupel in einzelne Objekte
    Original:
    creates a tuple of lvalue references or unpacks a tuple into individual objects
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    (Funktions-Template)[edit]
    erzeugt ein tuple aus rvalue Referenzen
    Original:
    creates a tuple of rvalue references
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    (Funktions-Template)[edit]
    erzeugt ein tuple durch Verketten einer beliebigen Anzahl von Tupeln
    Original:
    creates a tuple by concatenating any number of tuples
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    (Funktions-Template)[edit]
    Zugriff auf das angegebene Element des Tupels
    Original:
    tuple accesses specified element
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    (Funktions-Template)[edit]
    lexikographisch vergleicht die Werte in dem Tupel
    Original:
    lexicographically compares the values in the tuple
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    (Funktions-Template)[edit]
    (C++11)
    spezialisiert den std::swap Algorithmus
    Original:
    specializes the std::swap algorithm
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    (Funktions-Template)[edit]

    [Bearbeiten]Helper-Klassen

    erhält die Größe der tuple bei der Kompilierung
    Original:
    obtains the size of tuple at compile time
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    (class Template-Spezialisierung)[edit]
    erhält den Typ des angegebenen Elements
    Original:
    obtains the type of the specified element
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    (class Template-Spezialisierung)[edit]
    (C++11)
    spezialisiert die std::uses_allocator Typ Merkmal
    Original:
    specializes the std::uses_allocator type trait
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    (class Template-Spezialisierung)[edit]
    Platzhalter, um ein Element zu überspringen, wenn Auspacken einer tuple mit tie
    Original:
    placeholder to skip an element when unpacking a tuple using tie
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    (konstanten)[edit]

    [Bearbeiten]Beispiel

    #include <tuple>#include <iostream>#include <string>#include <stdexcept>   std::tuple<double, char, std::string> get_student(int id){if(id ==0)returnstd::make_tuple(3.8, 'A', "Lisa Simpson");if(id ==1)returnstd::make_tuple(2.9, 'C', "Milhouse Van Houten");if(id ==2)returnstd::make_tuple(1.7, 'D', "Ralph Wiggum");throwstd::invalid_argument("id");}   int main(){auto student0 = get_student(0);std::cout<<"ID: 0, "<<"GPA: "<<std::get<0>(student0)<<", "<<"grade: "<<std::get<1>(student0)<<", "<<"name: "<<std::get<2>(student0)<<'\n';   double gpa1;char grade1;std::string name1;std::tie(gpa1, grade1, name1)= get_student(1);std::cout<<"ID: 1, "<<"GPA: "<< gpa1 <<", "<<"grade: "<< grade1 <<", "<<"name: "<< name1 <<'\n';}

    Output: 

    ID: 0, GPA: 3.8, grade: A, name: Lisa Simpson ID: 1, GPA: 2.9, grade: C, name: Milhouse Van Houten
    Von „https://de.cppreference.com/mwiki/index.php?title=cpp/utility/tuple&oldid=32196“
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