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Define a smart constructor for Lam binding with Fin.

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This commit is contained in:
Rob Rix 2019-11-04 16:29:08 -05:00
parent ea2b679049
commit 4811adddae
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1 changed files with 7 additions and 1 deletions
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8
semantic-analysis/src/Analysis/Intro.hs
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@ -1,10 +1,11 @@
{-# LANGUAGE DeriveGeneric, DeriveTraversable, FlexibleContexts, GeneralizedNewtypeDeriving, QuantifiedConstraints, StandaloneDeriving #-}
{-# LANGUAGE DataKinds, DeriveGeneric, DeriveTraversable, FlexibleContexts, GeneralizedNewtypeDeriving, QuantifiedConstraints, StandaloneDeriving #-}
module Analysis.Intro
( unit
, bool
, string
, record
, lam
, lamFin
, lams
, unlam
, Intro(..)
@ -16,9 +17,11 @@ import Control.Effect.Carrier
import Data.String (IsString)
import Data.Text (Text)
import GHC.Generics (Generic1)
import Syntax.Fin
import Syntax.Module
import Syntax.Scope
import Syntax.Term
import Syntax.Var
unit :: (Carrier sig m, Member Intro sig) => m a
unit = send Unit
@ -35,6 +38,9 @@ record fs = send (Record fs)
lam :: (Eq a, Carrier sig m, Member Intro sig) => Maybe Name -> a -> m a -> m a
lam u n b = send (Lam u (abstract1 n b))
lamFin :: (Carrier sig m, Member Intro sig) => Maybe Name -> m (Var (Fin ('S n)) a) -> m (Var (Fin n) a)
lamFin u b = send (Lam u (toScopeFin b))
lams :: (Eq a, Foldable t, Carrier sig m, Member Intro sig) => t (Maybe Name, a) -> m a -> m a
lams names body = foldr (uncurry lam) body names