mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-11-24 15:07:37 +03:00
a972778eab
They don't all pass yet, for minor reasons. Coming shortly... Unfortunately the startup overhead for chez is really noticeable here!
65 lines
1.2 KiB
Idris
65 lines
1.2 KiB
Idris
-- a mini prelude
|
|
|
|
module Stuff
|
|
|
|
public export
|
|
data Bool = True | False
|
|
|
|
public export
|
|
not : Bool -> Bool
|
|
not True = False
|
|
not False = True
|
|
|
|
public export
|
|
data Maybe : Type -> Type where
|
|
Nothing : Maybe a
|
|
Just : (1 x : a) -> Maybe a
|
|
|
|
public export
|
|
data Either : Type -> Type -> Type where
|
|
Left : (1 x : a) -> Either a b
|
|
Right : (1 y : b) -> Either a b
|
|
|
|
public export
|
|
intToBool : Int -> Bool
|
|
intToBool 0 = False
|
|
intToBool x = True
|
|
|
|
public export
|
|
ifThenElse : Bool -> Lazy a -> Lazy a -> a
|
|
ifThenElse True t e = t
|
|
ifThenElse False t e = e
|
|
|
|
public export
|
|
data Nat = Z | S Nat
|
|
|
|
public export
|
|
fromInteger : Integer -> Nat
|
|
fromInteger x = ifThenElse (intToBool (prim__eq_Integer x 0))
|
|
Z (S (fromInteger (prim__sub_Integer x 1)))
|
|
|
|
public export
|
|
plus : Nat -> Nat -> Nat
|
|
plus Z y = y
|
|
plus (S k) y = S (plus k y)
|
|
|
|
infixr 5 ::
|
|
|
|
public export
|
|
data List a = Nil | (::) a (List a)
|
|
|
|
public export
|
|
data Eq : a -> b -> Type where
|
|
Refl : (x : a) -> Eq x x
|
|
|
|
public export
|
|
data Unit = MkUnit
|
|
|
|
public export
|
|
data Pair : Type -> Type -> Type where
|
|
MkPair : {a, b : Type} -> a -> b -> Pair a b
|
|
|
|
public export
|
|
the : (a : Type) -> a -> a
|
|
the _ x = x
|