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nicer exceptions

This commit is contained in:
voidlizard 2024-10-19 04:52:33 +03:00
parent 1315989fcf
commit 96327477f1
1 changed files with 6 additions and 8 deletions
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14
miscellaneous/suckless-conf/lib/Data/Config/Suckless/Script/Internal.hs
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@ -336,14 +336,10 @@ newtype NameNotBoundException =
deriving stock Show
deriving newtype (Generic,Typeable)
newtype NotLambda = NotLambda Id
deriving stock Show
deriving newtype (Generic,Typeable)
instance Exception NotLambda
data BadFormException c = BadFormException (Syntax c)
| ArityMismatch (Syntax c)
| NotLambda (Syntax c)
newtype TypeCheckError c = TypeCheckError (Syntax c)
@ -358,6 +354,7 @@ instance Exception NameNotBoundException
instance IsContext c => Show (BadFormException c) where
show (BadFormException sy) = show $ "BadFormException" <+> pretty sy
show (ArityMismatch sy) = show $ "ArityMismatch" <+> pretty sy
show (NotLambda sy) = show $ "NotLambda" <+> pretty sy
instance IsContext c => Show (TypeCheckError c) where
show (TypeCheckError sy) = show $ "TypeCheckError" <+> pretty sy
@ -491,7 +488,7 @@ apply_ s args = case s of
ListVal [SymbolVal "builtin:lambda", SymbolVal n] -> apply n args
SymbolVal what -> apply what args
Lambda d body -> applyLambda d body args
e -> throwIO $ BadFormException @c s
e -> throwIO $ NotLambda e
apply :: forall c m . ( IsContext c
, MonadUnliftIO m
@ -511,7 +508,7 @@ apply name args' = do
applyLambda argz body args'
Just (BindValue _) -> do
throwIO (NotLambda name)
throwIO (NotLambda (mkSym @c name))
Nothing -> throwIO (NameNotBound name)
@ -611,7 +608,7 @@ eval syn = handle (handleForm syn) $ do
e@Literal{} -> pure e
e -> throwIO $ BadFormException @c e
e -> throwIO $ NotLambda @c e
where
handleForm syn = \case
@ -619,6 +616,7 @@ eval syn = handle (handleForm syn) $ do
throwIO (BadFormException syn)
(ArityMismatch s :: BadFormException c) -> do
throwIO (ArityMismatch syn)
other -> throwIO other
runM :: forall c m a. ( IsContext c
, MonadUnliftIO m