struct reg_data *data; /* Additional data. */
char *subbeg; /* saved or original string
so \digit works forever. */
-#ifdef PERL_COPY_ON_WRITE
+#ifdef PERL_OLD_COPY_ON_WRITE
SV *saved_copy; /* If non-NULL, SV which is COW from original */
#endif
U32 *offsets; /* offset annotations 20001228 MJD */
? RX_MATCH_COPIED_on(prog) \
: RX_MATCH_COPIED_off(prog))
-#ifdef PERL_COPY_ON_WRITE
+#ifdef PERL_OLD_COPY_ON_WRITE
#define RX_MATCH_COPY_FREE(rx) \
STMT_START {if (rx->saved_copy) { \
SV_CHECK_THINKFIRST_COW_DROP(rx->saved_copy); \