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Construct nested let-bindings.

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Rob Rix 2022-02-01 14:29:13 -05:00
parent f60b256846
commit fe46c706ea
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1 changed files with 2 additions and 2 deletions
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semantic-analysis/src/Analysis/Syntax.hs
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@ -32,7 +32,7 @@ module Analysis.Syntax
import Analysis.Effect.Domain
import Analysis.Effect.Env (Env, bind)
import Analysis.Effect.Store
import Analysis.Name (Name, formatName)
import Analysis.Name (Name, formatName, nameI)
import Control.Applicative (Alternative(..), liftA3)
import Control.Effect.Labelled
import Control.Monad (guard)
@ -161,7 +161,7 @@ parseNode o = do
"false" -> pure (const (bool False))
"throw" -> fmap throw <$> resolve (head edges)
"if" -> liftA3 iff <$> findEdge (edgeNamed "condition") <*> findEdge (edgeNamed "consequence") <*> findEdge (edgeNamed "alternative") <|> pure (const noop)
"block" -> pure (const (bool True))
"block" -> fmap (foldl' (\ l (i, r) -> let_ (nameI i) l (const r)) noop . zip [0..]) . sequenceA <$> traverse resolve edges
t -> A.parseFail ("unrecognized type: " <> t)
edge :: (IntMap.Key -> A.Object -> A.Parser a) -> A.Value -> A.Parser a
edge f = A.withObject "edge" (\ edge -> do