C++ Array Library tuple_element() Function

Description

The C++ function std::tuple_element(std::array) provides compile-type indexed access to the type of the elements of the array using tuple-like interface.

Declaration

Following is the declaration for std::tuple_element(std::array) function form std::array header.

template< std::size_t I, class T, std::size_t N >
struct tuple_element<I, array<T, N> >;

Parameters

• T − type for which the tuple size is obtained.

• I − index of the element.

• N − size of the array.

Example

The following example shows the usage of std::tuple_element(std::array) function.

#include <iostream>
#include <array>

using namespace std;

int main(void) {

   array <int, 5> arr = {1, 2, 3, 4, 5};

   /* iterator pointing at the start of the array */
   auto itr = arr.begin();

   /* traverse complete container */
   while (itr != arr.end()) {
      cout << *itr << " ";
      ++itr;   /* increment iterator */
   }

   cout << endl;

   return 0;
}

Let us compile and run the above program, this will produce the following result −

1 2 3 4 5