sem.dcl

   1 definition module sem
   2
   3 import qualified Data.Map as Map
   4 from Data.Either import :: Either
   5 from AST import :: AST, :: Pos, :: Type, :: FieldSelector
   6 from StdOverloaded import class toString
   7
   8 :: SemError
   9         = ParseError Pos String
  10         | UnifyError Pos Type Type
  11     | FieldSelectorError Pos Type FieldSelector
  12         | Error String
  13 :: Gamma
  14 :: SemOutput :== Either [SemError] (AST, Gamma)
  15
  16 instance toString SemError
  17 instance toString Gamma
  18
  19 sem :: AST -> SemOutput