X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=6351c04369b0c83b12d447c031feb6c40c5b427a;hb=5b1c37a52f0d63d4972665f672df100a231a2f57;hp=92f1d51d4860276b98a5bef237cce59b90e48807;hpb=022b8166504765b2c84138fc83dfdfaa23fe5774;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index 92f1d51..6351c04 100644
--- a/sem.dcl
+++ b/sem.dcl
@@ -1,7 +1,16 @@
 definition module sem
 
 from Data.Either import :: Either
-from AST import :: AST
-from lex import :: Error
+from AST import :: AST, :: Pos, :: Type
+from StdOverloaded import class toString
 
-semanticAnalysis :: AST -> Either String AST
+:: SemError 
+	= ParseError Pos String 
+	| UnifyError Pos Type Type 
+	| Error String
+:: SemOutput :== Either [SemError] AST
+
+
+instance toString SemError
+
+sem :: AST -> SemOutput