grammar.hpp

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#pragma once
#include "symbol_table.hpp"
#include <string>
#include <unordered_map>
#include <vector>

using production = std::vector<std::string>;

struct Grammar {
 
    Grammar();
    explicit Grammar(
        const std::unordered_map<std::string, std::vector<production>>&
            grammar);
 

    void SetAxiom(const std::string& axiom);

    bool HasEmptyProduction(const std::string& antecedent) const;

    std::vector<std::pair<const std::string, production>> FilterRulesByConsequent(
        const std::string& arg) const;

    void Debug() const; //NOSONAR

    void AddProduction(const std::string&              antecedent,
                       const std::vector<std::string>& consequent);

    std::vector<std::string> Split(const std::string& s);

    std::unordered_map<std::string, std::vector<production>> g_;

    std::string axiom_;

    SymbolTable st_;
};