#pragma once

#include <deque>
#include <map>
#include <set>
#include <string>
#include <utility>
#include <vector>

using namespace std::string_literals;

using BNF = std::map<std::string, std::vector<std::vector<std::string>>>;
using Terminals = std::set<std::string>;
using PathElement = std::pair<std::string, size_t>; // Name, Index

std::map<std::string, std::set<std::string>> Reverse(BNF bnf);