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https://github.com/idris-lang/Idris2.git
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a972778eab
They don't all pass yet, for minor reasons. Coming shortly... Unfortunately the startup overhead for chez is really noticeable here!
114 lines
1.9 KiB
Idris
114 lines
1.9 KiB
Idris
-- a mini prelude
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module Stuff
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public export
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data Bool = True | False
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public export
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not : Bool -> Bool
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not True = False
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not False = True
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public export
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data Maybe a = Nothing | Just a
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infixl 4 &&
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public export
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(&&) : Bool -> Bool -> Bool
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(&&) True x = x
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(&&) False x = False
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public export
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intToBool : Int -> Bool
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intToBool 0 = False
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intToBool x = True
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public export
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ifThenElse : Bool -> Lazy a -> Lazy a -> a
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ifThenElse True t e = t
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ifThenElse False t e = e
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public export
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data Nat = Z | S Nat
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public export
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fromInteger : Integer -> Nat
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fromInteger x = ifThenElse (intToBool (prim__eq_Integer x 0))
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Z (S (fromInteger (prim__sub_Integer x 1)))
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public export
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plus : Nat -> Nat -> Nat
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plus Z y = y
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plus (S k) y = S (plus k y)
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infixr 5 ::
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public export
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data List a = Nil | (::) a (List a)
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public export
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data Equal : a -> b -> Type where
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Refl : {0 x : a} -> Equal x x
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infix 9 ===, ~=~
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public export
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(===) : (x : a) -> (y : a) -> Type
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(===) = Equal
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public export
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(~=~) : (x : a) -> (y : b) -> Type
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(~=~) = Equal
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public export
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data Unit = MkUnit
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namespace Builtin -- hardcoded in elaborator!
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public export
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data Pair : Type -> Type -> Type where
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MkPair : {0 a, b : Type} -> (1 x : a) -> (1 y : b) -> Pair a b
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public export
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fst : {0 a, b : Type} -> (a, b) -> a
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fst (x, y) = x
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public export
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snd : {0 a, b : Type} -> (a, b) -> b
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snd (x, y) = y
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%pair Pair fst snd
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namespace DPair
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public export
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data DPair : (a : Type) -> (a -> Type) -> Type where
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MkDPair : (x : a) -> prop x -> DPair a prop
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fst : DPair a p -> a
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fst (MkDPair x y) = x
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snd : (x : DPair a p) -> p (fst x)
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snd (MkDPair x y) = y
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public export
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data Unrestricted : Type -> Type where
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Un : (x : a) -> Unrestricted a
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public export
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the : (a : Type) -> a -> a
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the _ x = x
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public export
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id : a -> a
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id x = x
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public export
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data Void : Type where
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public export
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data Dec : Type -> Type where
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Yes : a -> Dec a
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No : (a -> Void) -> Dec a
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