sv_svtype#
Return the SV type as a numeric SVt_* code.
Synopsis#
if ($sv->SvTYPE == B::SVt_PVCV) { ... }
Compare against B::SVt_NULL, B::SVt_IV, B::SVt_PVCV, etc. The
blessed class of the wrapper already encodes the type at a coarser
granularity; SvTYPE is the precise value.