std::tuple – cppreference.com

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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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Member-Funktionen


(constructor)	baut eine neue `tuple` Original: constructs a new `tuple` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)

operator=	ordnet den Inhalt eines `tuple` zum anderen Original: assigns the contents of one `tuple` to another The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)

swap	tauscht die Inhalte von zwei `tuple`s Original: swaps the contents of two `tuple`s The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion)

Non-Member-Funktionen


make_tuple	erzeugt eine `tuple` Objekt des Typs von den Argumenttypen definiert Original: creates a `tuple` object of the type defined by the argument types The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

tie	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 The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

forward_as_tuple	erzeugt ein `tuple` aus rvalue Referenzen Original: creates a `tuple` of rvalue references The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

tuple_cat	erzeugt ein `tuple` durch Verketten einer beliebigen Anzahl von Tupeln Original: creates a `tuple` by concatenating any number of tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

std::get(std::tuple)	Zugriff auf das angegebene Element des Tupels Original: tuple accesses specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

operator== operator!= operator< operator<= operator> operator>=	lexikographisch vergleicht die Werte in dem Tupel Original: lexicographically compares the values in the tuple The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

std::swap(std::tuple) (C++11)	spezialisiert den std::swap Algorithmus Original: specializes the std::swap algorithm The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (Funktions-Template) [edit]

Helper-Klassen


tuple_size	erhält die Größe der `tuple` bei der Kompilierung Original: obtains the size of `tuple` at compile time The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (class Template-Spezialisierung) [edit]

tuple_element	erhält den Typ des angegebenen Elements Original: obtains the type of the specified element The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (class Template-Spezialisierung) [edit]

std::uses_allocator<std::tuple> (C++11)	spezialisiert die std::uses_allocator Typ Merkmal Original: specializes the std::uses_allocator type trait The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (class Template-Spezialisierung) [edit]

ignore	Platzhalter, um ein Element zu überspringen, wenn Auspacken einer `tuple` mit `tie` Original: placeholder to skip an element when unpacking a `tuple` using `tie` The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (konstanten) [edit]

Beispiel

#include <tuple>
#include <iostream>
#include <string>
#include <stdexcept>

std::tuple<double, char, std::string> get_student(int id)
{
    if (id == 0) return std::make_tuple(3.8, 'A', "Lisa Simpson");
    if (id == 1) return std::make_tuple(2.9, 'C', "Milhouse Van Houten");
    if (id == 2) return std::make_tuple(1.7, 'D', "Ralph Wiggum");
    throw std::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