definition module sem
+import qualified Data.Map as Map
from Data.Either import :: Either
-from AST import :: AST, :: Pos, :: Type
+from AST import :: AST, :: Pos, :: Type, :: FieldSelector, :: Op2
+from StdOverloaded import class toString
:: SemError
- = ParseError Pos String
- | UnifyError Pos Type Type
- | Error String
-:: SemOutput :== Either [SemError] AST
-
+:: Gamma
+:: SemOutput :== Either [SemError] (AST, Gamma)
+:: Constraints :== [(Type, Type)]
instance toString SemError
+instance toString Gamma
-sem :: AST -> SemOutput
+sem :: AST -> Either [SemError] AST