X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=a5705977b29780197eb20ccbb152a641a1422df9;hb=c5fb28639ae923d9b55f5832e45186911e610991;hp=e981361a44e0f6f41e100c6788fccc497caacff2;hpb=2953e6cc260d8243e5434b7e787258ab073d34d2;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index e981361..a570597 100644
--- a/sem.dcl
+++ b/sem.dcl
@@ -6,16 +6,11 @@ from AST import :: AST, :: Pos, :: Type, :: FieldSelector, :: Op2
 from StdOverloaded import class toString
 
 :: SemError 
-	= ParseError Pos String 
-	| UnifyError Pos Type Type 
-    | FieldSelectorError Pos Type FieldSelector 
-	| OperatorError Pos Op2 Type
-    | UndeclaredVariableError Pos String
-	| Error String
 :: Gamma
 :: SemOutput :== Either [SemError] (AST, Gamma)
+:: Constraints :== [(Type, Type)]
 
 instance toString SemError
 instance toString Gamma
 
-sem :: AST -> SemOutput
+sem :: AST -> Either [SemError] (AST, Gamma)