C++ Array Library tuple_element() Function

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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