int main()
{
using Language = derp::Language<char>;
using GC = Language::GarbageCollector;
using Factory = derp::Factory<Language>;
GC gc;
Factory F(gc);
// Language = ("foo" | "bar")*
Language l = *(F("foo") | "bar");
std::cout << "grammar: " << l.toString() << std::endl;
std::cout << "input: " << std::flush;
std::string input;
std::getline(std::cin, input);
std::cout << "matches? " << derp::matches(input, l) << std::endl;
}
