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Define a lifting of cons2.

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Rob Rix 2017-01-05 14:40:16 -05:00
parent fe6a0852c5
commit e5f4aed989
1 changed files with 4 additions and 0 deletions
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4
src/Data/Functor/Listable.hs
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@ -13,6 +13,7 @@ module Data.Functor.Listable
, Listable2(..)
, tiers2
, liftCons1
, liftCons2
) where
import Prologue
@ -35,6 +36,9 @@ tiers2 = liftTiers2 tiers tiers
liftCons1 :: [[a]] -> (a -> b) -> [[b]]
liftCons1 tiers f = mapT f tiers `addWeight` 1
liftCons2 :: [[a]] -> [[b]] -> (a -> b -> c) -> [[c]]
liftCons2 tiers1 tiers2 f = mapT (uncurry f) (productWith (,) tiers1 tiers2) `addWeight` 1
-- Instances