xav_fill AvFILLp(bstate->bs_sv) SSize_t
xav_max AvMAX(bstate->bs_sv) SSize_t
xhv_riter HvRITER(bstate->bs_sv) I32
-xhv_name HvNAME(bstate->bs_sv) pvindex
+xhv_name bstate->bs_sv pvindex x
hv_store bstate->bs_sv svindex x
sv_magic bstate->bs_sv char x
mg_obj SvMAGIC(bstate->bs_sv)->mg_obj svindex