char *to;
} substring_t;
-int match_token(char *, match_table_t table, substring_t args[]);
+int match_token(char *, const match_table_t table, substring_t args[]);
int match_int(substring_t *, int *result);
int match_octal(substring_t *, int *result);
int match_hex(substring_t *, int *result);