symbol_table.hpp

#pragma once
#include <string>
#include <unordered_map>
#include <utility>
#include <vector>
 
enum symbol_type { NO_TERMINAL, TERMINAL };
 
struct symbol_table {
    inline static std::string EOL_{"$"};

    inline static std::string EPSILON_{"EPSILON"};

    inline static std::unordered_map<std::string,
                                     std::pair<symbol_type, std::string>>
        st_{{EOL_, {TERMINAL, EOL_}}, {EPSILON_, {TERMINAL, EPSILON_}}};

    inline static std::unordered_map<std::string, unsigned long> token_types_{
        {EOL_, 1}};

    inline static std::unordered_map<unsigned long, std::string> token_types_r_{
        {1, EOL_}};

    inline static std::vector<unsigned long> order_{1};

    inline static unsigned long i_{2};

    static void PutSymbol(const std::string& identifier,
                          const std::string& regex);

    static void PutSymbol(const std::string& identifier);

    static bool In(const std::string& s);

    static bool IsTerminal(const std::string& s);

    static std::string GetValue(const std::string& terminal);

    static void Debug();

    static void SetEol(const std::string& eol);
};