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|
{-# LANGUAGE NoImplicitPrelude #-}
-- declarations of builtin functions and data types used by the compiler
module Internals where
undefined :: forall (a :: Type) . a
data Unit = TT
data String
data Empty (a :: String)
-- TODO: generate?
data Tuple0 = Tuple0
data Tuple1 a = Tuple1 a
data Tuple2 a b = Tuple2 a b
data Tuple3 a b c = Tuple3 a b c
data Tuple4 a b c d = Tuple4 a b c d
data Tuple5 a b c d e = Tuple5 a b c d e
-- ... TODO
-- builtin used for overlapping instances
parEval :: forall a -> a -> a -> a
type family EqCT (t :: Type) (a :: t) (b :: t) -- equality constraints
type family T2 a b -- conjuction of constraints
-- builtin conjuction of constraint witnesses
t2C :: Unit -> Unit -> Unit
-- builtin type constructors
data Int
data Word
data Float
data Char
data Bool = False | True
data Ordering = LT | EQ | GT
-- builtin primitives
primIntToWord :: Int -> Word
primIntToFloat :: Int -> Float
primCompareInt :: Int -> Int -> Ordering
primCompareWord :: Word -> Word -> Ordering
primCompareFloat :: Float -> Float -> Ordering
primCompareString :: String -> String -> Ordering
primNegateInt :: Int -> Int
primNegateWord :: Word -> Word
primNegateFloat :: Float -> Float
primAddInt :: Int -> Int -> Int
primSubInt :: Int -> Int -> Int
primModInt :: Int -> Int -> Int
primSqrtFloat :: Float -> Float
primRound :: Float -> Int
primIfThenElse :: Bool -> a -> a -> a
primIfThenElse True a b = a
primIfThenElse False a b = b
-- fromInt is needed for integer literal
class Num a where
fromInt :: Int -> a
compare :: a -> a -> Ordering
negate :: a -> a
instance Num Int where
fromInt = \x -> x
compare = primCompareInt
negate = primNegateInt
instance Num Word where
fromInt = primIntToWord
compare = primCompareWord
negate = primNegateWord
instance Num Float where
fromInt = primIntToFloat
compare = primCompareFloat
negate = primNegateFloat
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