ranges/istreamview.cpp

The following code example is taken from the book
C++20 - The Complete Guide by Nicolai M. Josuttis, Leanpub, 2021
The code is licensed under a Creative Commons Attribution 4.0 International License. Creative Commons License

// raw code

#include <iostream>
#include <string>
#include <sstream>
#include <ranges>

void print(std::ranges::input_range auto&& coll)
{
  for (const auto& elem : coll) {
    std::cout << elem << "  ";
  }
  std::cout << '\n';
}

int main()
{
  std::string s{"2 4 6 8 Motorway 1977 by Tom Robinson"};

  std::istringstream mystream1{s};
  std::ranges::istream_view<std::string> vs{mystream1};
  print(vs);

  std::istringstream mystream2{s};
  auto vi = std::views::istream<int>(mystream2);
  print(vi);
}