//********************************************************
// The following code example is taken from the book
//  C++23 - The Complete Guide
//  by Nicolai M. Josuttis (www.josuttis.com)
//  https://www.cppstd23.com
//
// The code is licensed under a
//  Creative Commons Attribution 4.0 International License
//  https://creativecommons.org/licenses/by/4.0/
//********************************************************


#include <print>
#include <vector>
#include <ranges>
#include <algorithm>
#include <functional>

int main()
{
  std::vector<int> coll{8, 15, 7, 11, 8, 0};

  // check whether the first three elements are less than 10:
  auto sub1 = std::views::repeat(10, 3);  // 10, 10, 10
  std::println("{} starts below {}: {}",
               coll, sub1, 
               std::ranges::starts_with(coll, sub1, 
                                        std::ranges::less{}));

  // check whether the first three elements are less than 20:
  auto sub2 = std::views::repeat(20, 3);  // 20, 20, 20
  std::println("{} starts below {}: {}",
               coll, sub2, 
               std::ranges::ends_with(coll, sub2,
                                      std::ranges::less{}));
}