7 #define SYMNULL (struct symbol *)NULL
15 struct symbol *tab_clone(struct symbol *tab);
16 struct symbol *tab_new(void);
17 struct symbol *tab_add_symbol(struct symbol *tab, char *ident, short type, short check);
18 struct symbol *tab_lookup(struct symbol *tab, char *ident, short type);
19 struct symbol *tab_remove_symbol(struct symbol *tab, char *ident, short type);
20 struct symbol *tab_merge(struct symbol *tab, struct symbol *to_add, short check);
21 void check(struct symbol *tab, char *ident, short type);