int main(int argc, const char* argv[]) {
  flow::lang::Interpreter interpreter;
  interpreter.registerFunction("greetings").param<std::string>("from").bind([](Params& params) {
    std::cout << "Greetings, " << params.getString(1) << '\n';
  });

  interpreter.compileSource(R"|
    main {
      greetings "World";
    }
  |");

  interpreter.run("main");
}