linear-base-0.3.0: src/Data/Tuple/Linear.hs

{-# LANGUAGE LinearTypes #-}
{-# LANGUAGE NoImplicitPrelude #-}

-- | This module provides linear functions commonly used on tuples.
module Data.Tuple.Linear
  ( fst,
    snd,
    swap,
    curry,
    uncurry,
  )
where

import Data.Unrestricted.Linear.Internal.Consumable
import Prelude.Linear.Internal (curry, uncurry)

fst :: Consumable b => (a, b) %1 -> a
fst (a, b) = lseq b a

snd :: Consumable a => (a, b) %1 -> b
snd (a, b) = lseq a b

swap :: (a, b) %1 -> (b, a)
swap (a, b) = (b, a)