C++17: std::reduce()

C++17 added std::reduce(), which applies applies a binary operation on a range of elements. The default binary operation is addition. Here is an example (simulated with C++14):

#include <iostream>
#include <vector>

namespace std17
{
  template<class InputIt>
  typename std::iterator_traits<InputIt>::value_type
  reduce(InputIt first, InputIt last)
  {
    std::iterator_traits<InputIt>::value_type sum =
                 std::iterator_traits<InputIt>::value_type();
    for (auto iter = first; iter != last; iter++)
    {
      sum = sum + *iter;
    }
    return sum;
  }
}

int main()
{
  std::vector<int> myInputVector{1, 2, 3, 4, 5};
  int              result;

  result = std17::reduce(myInputVector.begin() ,
                         myInputVector.end()   );

  std::cout << result << " ";
  std::cout << std::endl;
  return 0;
}
// Output: 15

Reference: http://en.cppreference.com/w/cpp/algorithm/reduce