#ifndef INTERPRETER_H
#define INTERPRETER_H

#include <variant>
#include <string>
#include <stdexcept>
using namespace std;

using EvalResult = variant<int, monostate>;

class RuntimeError : public runtime_error {
public:
    explicit RuntimeError(const string& message)
        : runtime_error(message) {}
};

/*
    Evaluates the AST, returning the latest calulated value
*/
EvalResult eval(Node &ast);

#endif