mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-24 12:14:26 +03:00
20 lines
577 B
Idris
20 lines
577 B
Idris
data Vect : Nat -> Type -> Type where
|
|
Nil : Vect Z a
|
|
(::) : a -> (1 xs : Vect k a) -> Vect (S k) a
|
|
|
|
partial
|
|
append : (1 _ : Vect n a) -> Vect m a -> Vect (n + m) a
|
|
append (x :: zs@(y :: ws)) ys = ?foo -- zs usable, y+ws not
|
|
|
|
cappend : (1 _ : Vect n a) -> Vect m a -> Vect (plus n m) $a
|
|
cappend xs ys
|
|
= case xs of
|
|
Nil => ys
|
|
x :: zs => ?bar -- zs usable, xs not
|
|
|
|
cappend2 : (1 _ : Vect n a) -> Vect m a -> Vect (plus n m) a
|
|
cappend2 xs ys
|
|
= case xs of
|
|
Nil => ys
|
|
x :: zs => let ts = zs in ?baz -- ts usable, xs+zs not
|