#ifndef INTERPRETER_H_
#define INTERPRETER_H_

#include <stdbool.h>
#include "expr.h"

struct EvalResult
{
    bool is_error;
    union
    {
        struct Expr expr;
        const char *error;
    };
};

struct EvalResult eval_success(struct Expr result);
struct EvalResult eval_failure(const char *error);

struct EvalResult eval(struct Expr scope, struct Expr expr);

#endif  // INTERPRETER_H_