mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-28 22:22:10 +03:00
47 lines
1.0 KiB
Plaintext
47 lines
1.0 KiB
Plaintext
data Nat : Type where
|
|
Z : Nat
|
|
S : Nat -> Nat
|
|
|
|
plus : Nat -> Nat -> Nat
|
|
plus Z y = y
|
|
plus (S k) y = S (plus k y)
|
|
|
|
data Vect : ? -> Type -> Type where
|
|
Nil : Vect Z a
|
|
Cons : a -> Vect k a -> Vect (S k) a
|
|
|
|
record MyDPair a (p : a -> Type) where
|
|
constructor MkMyDPair
|
|
dfst : a
|
|
dsnd : p dfst
|
|
|
|
testPair : MyDPair Nat (\n => Vect n Integer)
|
|
testPair = MkMyDPair _ (Cons 1 (Cons 2 (Cons 3 Nil)))
|
|
|
|
cons : t -> MyDPair Nat (\n => Vect n t) -> MyDPair Nat (\n => Vect n t)
|
|
cons val xs
|
|
= record { dfst = S (dfst xs),
|
|
dsnd = Cons val (dsnd xs) } xs
|
|
|
|
cons' : t -> MyDPair Nat (\n => Vect n t) -> MyDPair Nat (\n => Vect n t)
|
|
cons' val xs
|
|
= record { dfst $= S,
|
|
dsnd $= Cons val } xs
|
|
|
|
record Stats where
|
|
constructor MkStats
|
|
height : Integer
|
|
weight : Integer
|
|
|
|
record Person where
|
|
constructor MkPerson
|
|
name : String
|
|
age, shoesize : Integer
|
|
more : Stats
|
|
|
|
testPerson : Person
|
|
testPerson = MkPerson "Fred" 1337 10 (MkStats 10 10)
|
|
|
|
grow : Person -> Person
|
|
grow p = record { more->height $= prim__add_Integer 1 } p
|