tuple_element Class <tuple>
Wraps the type of a tuple element.
template<int Idx, class Tuple>
class tuple_element {
typedef Ti type;
};
Parameters
Idx
The index of the designated element.Tuple
The type of the tuple.
Remarks
The template class has a nested typedef type that is a synonym for the type at index Idx of the tuple type Tuple.
Example
// std_tr1__tuple__tuple_element.cpp
// compile with: /EHsc
#include <tuple>
#include <iostream>
#include <utility>
typedef std::tuple<int, double, int, double> Mytuple;
int main()
{
Mytuple c0(0, 1, 2, 3);
// display contents " 0 1 2 3"
std::cout << " " << std::get<0>(c0);
std::cout << " " << std::get<1>(c0);
std::cout << " " << std::get<2>(c0);
std::cout << " " << std::get<3>(c0);
std::cout << std::endl;
// display first element " 0"
std::tuple_element<0, Mytuple>::type val = std::get<0>(c0);
std::cout << " " << val;
std::cout << std::endl;
return (0);
}
0 1 2 3 0
Requirements
Header: <tuple>
Namespace: std