CPM.cmake/examples/simple_match/main.cpp

#include <simple_match/simple_match.hpp>

#include <iostream>

int main(int argc, char ** argv){
  using namespace simple_match;
  using namespace simple_match::placeholders;

  std::string input;
  std::cout << "please enter a number or 'quit' to exit" << std::endl;

  while (true) {
    std::cout << "> ";
    std::getline(std::cin, input);
    if (input == "quit") { break; }
    int x;
    try {
      x = std::stoi(input);
    } catch(std::invalid_argument &) {
      std::cout << "invalid input" << std::endl;
      continue;
    }
    
    match(x,
      1, []() {std::cout << "The answer is one\n"; },
      2, []() {std::cout << "The answer is two\n"; },
      _x < 10, [](auto&& a) {std::cout << "The answer " << a << " is less than 10\n"; },
      10 < _x < 20,	[](auto&& a) {std::cout << "The answer " << a  << " is between 10 and 20 exclusive\n"; },
      _, []() {std::cout << "Did not match\n"; }
    );
  }

  return 0;
}