TYPEMAP
Detector *	O_OBJECT

INPUT
O_OBJECT
	if (sv_isobject($arg) && (SvTYPE(SvRV($arg)) == SVt_PVMG)) {
	    $var = ($type)SvIV((SV*)SvRV( $arg ));
	} else {
	    warn(\"${Package}::$func_name() -- $var is not a blessed SV reference\");
	    XSRETURN_UNDEF;
	}

OUTPUT
# The Perl object is blessed into 'CLASS', which should be a
# char * having the name of the package for the blessing.
O_OBJECT
	sv_setref_pv($arg, CLASS, (void*)$var);