<b_jonas> learn can\'t is the most frequent word whose pronunciation varies between /\xc9\x91\xcb\x90/ and /\xc3\xa6/ depending on dialect. The list is: advance after answer ask aunt brass can\'t cast castle chance class command dance demand draft enhance example fast father glass graph grass half last laugh mask master nasty pass past path plant rather sample shan\'t staff task vast

#ifndef SUB_H_
#define SUB_H_

#include "config.h"

#include <stddef.h>

struct expr;
struct sub;

struct sub *sub_new(const struct expr *);
struct sub *sub_incr(struct sub *);
void sub_decr(struct sub *);
ATTR_PURE
struct expr *sub_expr(const struct sub *);
size_t sub_id(const struct sub *);

#endif /* SUB_H_ */