//********************************************************
// 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 <string>
#include <vector>
#include <ranges>
#include <flat_set>

int main()
{
  // init from an initializer list:
  std::flat_set<std::string> fs1{"Kiev", "Tokyo", "Berlin", "Rio"};
  std::println("fs1:   {}\n", fs1);

  // init from a range/view:
  std::vector<std::string> names{"tic", "tac", "toe"};
  std::println("names: {}", names);
  std::flat_set fs2{std::from_range, names};
  std::println("fs2:   {}\n", fs2);

  // init with a sorting criterion for ascending:
  std::flat_set<std::string, std::greater<>> 
         fs3{std::from_range, names | std::views::stride(2)};
  std::println("fs3:   {}\n", fs3);
}