    -- Copyright © 2011 National Institute of Aerospace / Galois, Inc.

    {-# LANGUAGE Safe #-}

    -- | Equality applied point-wise on streams.
    module Copilot.Language.Operators.Eq
      ( (==)
      , (/=)
      ) where

    import Copilot.Core (Typed, typeOf)
    import qualified Copilot.Core as Core
    import Copilot.Language.Prelude
    import Copilot.Language.Stream
    import qualified Prelude as P

    -- | Compare two streams point-wise for equality.
    --
    -- The output stream contains the value True at a point in time if both
    -- argument streams contain the same value at that point in time.
    (==) :: (P.Eq a, Typed a) => Stream a -> Stream a -> Stream Bool
    (Const a
    x) == :: forall a. (Eq a, Typed a) => Stream a -> Stream a -> Stream Bool
    == (Const a
    y) = Bool -> Stream Bool
    forall a. Typed a => a -> Stream a
    Const (a
    x a -> a -> Bool
    forall a. Eq a => a -> a -> Bool
    P.== a
    y)
    Stream a
    x == Stream a
    y = Op2 a a Bool -> Stream a -> Stream a -> Stream Bool
    forall a1 b a.
    (Typed a1, Typed b, Typed a) =>
    Op2 a1 b a -> Stream a1 -> Stream b -> Stream a
    Op2 (Type a -> Op2 a a Bool
    forall a. Eq a => Type a -> Op2 a a Bool
    Core.Eq Type a
    forall a. Typed a => Type a
    typeOf) Stream a
    x Stream a
    y

    -- | Compare two streams point-wise for inequality.
    --
    -- The output stream contains the value True at a point in time if both
    -- argument streams contain different values at that point in time.
    (/=) :: (P.Eq a, Typed a) => Stream a -> Stream a -> Stream Bool
    (Const a
    x) /= :: forall a. (Eq a, Typed a) => Stream a -> Stream a -> Stream Bool
    /= (Const a
    y) = Bool -> Stream Bool
    forall a. Typed a => a -> Stream a
    Const (a
    x a -> a -> Bool
    forall a. Eq a => a -> a -> Bool
    P./= a
    y)
    Stream a
    x /= Stream a
    y = Op2 a a Bool -> Stream a -> Stream a -> Stream Bool
    forall a1 b a.
    (Typed a1, Typed b, Typed a) =>
    Op2 a1 b a -> Stream a1 -> Stream b -> Stream a
    Op2 (Type a -> Op2 a a Bool
    forall a. Eq a => Type a -> Op2 a a Bool
    Core.Ne Type a
    forall a. Typed a => Type a
    typeOf) Stream a
    x Stream a
    y