curry gotcha

[cc1516.git] / sem.dcl

diff --git a/sem.dcl b/sem.dcl
index e981361..a570597 100644 (file)
--- 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)