#ifndef EXPRESSION_H
#define EXPRESSION_H

#include "scanner.h"
#include <stdarg.h>

typedef enum {
    EXPRESSION,
    LITERAL,
    GROUPING,
    UNARY,
    BINARY,
    OPERATOR
} ExpressionType;

typedef struct Expr Expr;

struct binary {
    struct Expr* left;
    Token* op;
    struct Expr* right;
};

struct grouping {
    struct Expr* expression;
};

struct unary {
    Token* op;
    struct Expr* right;
};

struct Expr {
    ExpressionType type;
    union ex {
        struct binary Binary;
        struct grouping Grouping;
        Token* Literal;
        struct unary Unary;
    } expression;
};

// void VisitBinary(struct binary);
// void VisitGrouping(struct grouping);
// void VisitLiteral(Token);
// void VisitUnary(struct unary);

#endif