std::tuple_cat

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C++

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Tipo di supporto (basic types, RTTI, type traits)

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Gli operatori relazionali Original: Relational operators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

rel_ops::operator!= rel_ops::operator> rel_ops::operator<= rel_ops::operator>=

Coppie e tuple Original: Pairs and tuples The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

pair

tuple (C++11)

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swap

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std::tuple

Membri funzioni Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

tuple::tuple

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make_tuple

tie

forward_as_tuple

None

operator= operator!= operator< operator<= operator> operator>=

std::swap

get

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tuple_size

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<tbody> </tbody>

Elemento definito nell'header <tuple>
template< class... Tuples > tuple<CTypes...> tuple_cat(Tuples&&... args);		(dal C++11)

Costruisce una tupla che è una concatenazione di tutte le tuple in args.

Original:

Constructs a tuple that is a concatenation of all tuples in args.

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Parametri

args

-

zero o più tuple da concatenare Original: zero or more tuples to concatenate The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valore di ritorno

Un oggetto std::tuple composto da tutti gli elementi di tutte le tuple degli argomenti costruiti da std::get<i>(std::forward<Ti>(arg)) per ogni singolo elemento.

Original:

A std::tuple object composed of all elements of all argument tuples constructed from std::get<i>(std::forward<Ti>(arg)) for each individual element.

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Esempio

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

// helper function to print a tuple of any size
template<class Tuple, std::size_t N>
struct TuplePrinter {
    static void print(const Tuple& t) 
    {
        TuplePrinter<Tuple, N-1>::print(t);
        std::cout << ", " << std::get<N-1>(t);
    }
};

template<class Tuple>
struct TuplePrinter<Tuple, 1> {
    static void print(const Tuple& t) 
    {
        std::cout << std::get<0>(t);
    }
};

template<class... Args>
void print(const std::tuple<Args...>& t) 
{
    std::cout << "(";
    TuplePrinter<decltype(t), sizeof...(Args)>::print(t);
    std::cout << ")\n";
}
// end helper function

int main()
{
    std::tuple<int, std::string, float> t1(10, "Test", 3.14);
    int n = 7;
    auto t2 = std::tuple_cat(t1, std::make_pair("Foo", "bar"), t1, std::tie(n));
    n = 10;
    print(t2);
}

Output:

(10, Test, 3.14, Foo, bar, 10, Test, 3.14, 10)

make_tuple	crea un oggetto tuple del tipo definito dai tipi di argomenti 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. (funzione di modello)
tie	crea un tuple di riferimenti lvalue o spacchetta una tupla in singoli oggetti 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. (funzione di modello)
forward_as_tuple	crea un tuple di riferimenti rvalue 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. (funzione di modello)