#ifndef __PARSER__H__
#define __PARSER__H__

#include "lexer.hpp"

namespace lex {

    typedef double (*call_function)(double d);
    class Func {
      public:
        std::string name;
        call_function func;
        Func() = default;
        Func(std::string n, call_function f) {
            name = n;
            func = f;
        }
    };

    double app_exit(double d);
    double app_clear(double d);

    extern std::unordered_map<std::string, Func> function;

    class Parser : public Scanner {

      public:
        explicit Parser(std::istream *stream) : Scanner{stream} {}
        explicit Parser(std::istream &stream) : Scanner{stream} {}
        bool eval();
        double prim(bool get);
        double term(bool get);
        double expr(bool get);
        std::string v_assign;
    };
} // namespace lex

#endif