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std::get(std::tuple)

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< cpp‎ | utility‎ | tuple

 
 
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initializer_list(C++11)
bitset
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Os operadores relacionais
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Pares e tuplas
Original:
Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
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std::tuple
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Original:
Member functions
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get
Classes auxiliares
Original:
Helper classes
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tuple_size
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template< std::size_t I, class... Types >

typename std::tuple_element<I, tuple<Types...> >::type&

    get( tuple<Types...>& t );
(1) (a partir do C++ 11)
template< std::size_t I, class... Types >

typename std::tuple_element<I, tuple<Types...> >::type&&

    get( tuple<Types...>&& t );
(2) (a partir do C++ 11)
template< std::size_t I, class... Types >

typename std::tuple_element<I, tuple<Types...> >::type const&

    get( const tuple<Types...>& t );
(3) (a partir do 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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Índice

[editar] Parâmetros

t -
tupla cujo conteúdo para extrair
Original:
tuple whose contents to extract
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[editar] 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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[editar] Exceções

noexcept specification:  
noexcept
  (a partir do C++ 11)

[editar] 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";
}

Output:

(1, Foo, 3.14)

[editar] Veja também

accesses an element of an array
(modelo de função) [edit]
acede a um elemento de um pair
Original:
accesses an element of a pair
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(modelo de função) [edit]