TYPEMAP
YamCha::Parser*            O_OBJECT
YamCha::Param*             O_OBJECT

OUTPUT
O_OBJECT
	  sv_setref_pv( $arg, CLASS, (void*)$var );

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;
        }
