// Copyright (c) 2023, Marvin Borner <dev@marvinborner.de>
// SPDX-License-Identifier: MIT

#ifndef CALM_PARSE_H
#define CALM_PARSE_H

#include <lib/hash.h>

typedef enum { INV, ABS, APP, VAR } term_type_t;

struct term {
	term_type_t type;
	hash_t hash;
	size_t refs;
	size_t depth;
	union {
		struct {
			struct term *term;
		} abs;
		struct {
			struct term *lhs;
			struct term *rhs;
		} app;
		struct {
			int index;
		} var;
	} u;
};

struct term_handle {
	struct term *term;
	hash_t hash;
};

struct term_handle parse_blc(char **term, size_t depth);
int parse_get_max_depth(void);

#endif