+ |const bool silence_non_portable \
+ |NULLOK SV** ret_invlist
+Es |bool|could_it_be_POSIX |NN struct RExC_state_t *pRExC_state
+Es |regnode*|handle_sets |NN struct RExC_state_t *pRExC_state \
+ |NN I32 *flagp|U32 depth \
+ |NN char * const oregcomp_parse