STATIC char* S_regwhite(pTHX_ char *, char *);
STATIC char* S_nextchar(pTHX);
STATIC regnode* S_dumpuntil(pTHX_ regnode *start, regnode *node, regnode *last, SV* sv, I32 l);
-STATIC void S_scan_commit(pTHX_ scan_data_t *data);
-STATIC I32 S_study_chunk(pTHX_ regnode **scanp, I32 *deltap, regnode *last, scan_data_t *data, U32 flags);
+STATIC void S_scan_commit(pTHX_ struct scan_data_t *data);
+STATIC I32 S_study_chunk(pTHX_ regnode **scanp, I32 *deltap, regnode *last, struct scan_data_t *data, U32 flags);
STATIC I32 S_add_data(pTHX_ I32 n, char *s);
STATIC void S_re_croak2(pTHX_ const char* pat1, const char* pat2, ...) __attribute__((noreturn));
STATIC I32 S_regpposixcc(pTHX_ I32 value);