+EXTERN_C const struct regexp_engine reh_regexp_engine;
+
EXTERN_C void reh_call_comp_begin_hook(pTHX_ regexp *);
EXTERN_C void reh_call_comp_node_hook(pTHX_ regexp *, regnode *);
EXTERN_C void reh_call_exec_node_hook(pTHX_ regexp *, regnode *, regmatch_info *, regmatch_state *);