std::get(std::tuple)

 

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Os operadores relacionais 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>=

Pares e tuplas 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.

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std::tuple

Funções de membro 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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Não-membros funções Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

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get

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template< std::size_t I, class... Types > typename std::tuple_element<I, tuple<Types...> >::type&     get( tuple<Types...>& t );	(1)	(desde C++11)
template< std::size_t I, class... Types > typename std::tuple_element<I, tuple<Types...> >::type&&     get( tuple<Types...>&& t );	(2)	(desde C++11)
template< std::size_t I, class... Types > typename std::tuple_element<I, tuple<Types...> >::type const&     get( const tuple<Types...>& t );	(3)	(desde C++11)

Extrai o elemento elemento Ith da tupla. I é um valor inteiro em [0, sizeof...(Types)).

Original:

Extracts the Ith element element from the tuple. I is an integer value in [0, sizeof...(Types)).

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Parâmetros

t

-

tupla cujo conteúdo para extrair Original: tuple whose contents to extract The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

Valor de retorno

1)

Referência para o elemento de Ith t.

Original:

Reference to the Ith element of t.

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2)

Rvalue referência para o elemento de Ith t, a menos que o elemento é de lvalue tipo de referência, neste caso, é devolvido lvalue referência.

Original:

Rvalue reference to the Ith element of t, unless the element is of lvalue reference type, in which case lvalue reference is returned.

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3)

Const referência ao elemento Ith de t.

Original:

Const reference to the Ith element of t.

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Exceções

noexcept specification:  

noexcept

  (desde C++11)

Exemplo

#include <iostream>
#include <string>
#include <tuple>
 
int main()
{
    auto t = std::make_tuple(1, "Foo", 3.14);
    std::cout << "(" << std::get<0>(t) << ", " << std::get<1>(t)
              << ", " << std::get<2>(t) << ")\n";
}

Saída:

(1, Foo, 3.14)

Veja também

std::get(std::array)	accesses an element of an array (modelo de função)
std::get(std::pair) (C++11)	acede a um elemento de um pair Original: accesses an element of a pair The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (modelo de função)