X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=2b13436634edc08c5e11765533dd8d4d7b12a448;hb=483bcde4dbb75d1901cffad6cc2c45307b7e90a2;hp=e981361a44e0f6f41e100c6788fccc497caacff2;hpb=2953e6cc260d8243e5434b7e787258ab073d34d2;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index e981361..2b13436 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