symbol_table.hpp

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#pragma once
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>

enum class symbol_type { NO_TERMINAL, TERMINAL };

struct SymbolTable {
    std::string EOL_{"$"};

    std::string EPSILON_{"EPSILON"};

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

    std::unordered_set<std::string> terminals_{EOL_};

    std::unordered_set<std::string> terminals_wtho_eol_{};

    std::unordered_set<std::string> non_terminals_;

    void PutSymbol(const std::string& identifier, bool isTerminal);

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

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

    bool IsTerminalWthoEol(const std::string& s) const;
};