TUPLE: v+ { x read-only } { y read-only } ;
C: <v+> v+

M: v+ length x>> length ; inline

M: v+ nth-unsafe [ x>> ] [ y>> ] bi [ nth-unsafe ] bi-curry@ bi + ; inline

INSTANCE: v+ sequence

TUPLE: v*n { x read-only } { y read-only } ;
C: <v*n> v*n

M: v*n length x>> length ; inline

M: v*n nth-unsafe [ x>> nth-unsafe ] [ y>> ] bi * ; inline

INSTANCE: v*n sequence

[ { float-array float-array } declare <v+> 5.0 <v*n> float-array{ } clone-like ] optimized.