X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=b34bbc35e8f98f60f5e71a6c73b40d461df60f09;hb=6e5d435a99f84ad4f4f7cb4f6a41c28b79c29ab3;hp=92f1d51d4860276b98a5bef237cce59b90e48807;hpb=022b8166504765b2c84138fc83dfdfaa23fe5774;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index 92f1d51..b34bbc3 100644
--- a/sem.dcl
+++ b/sem.dcl
@@ -1,7 +1,17 @@
 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 
+	| UnifyErrorStub Type Type 
+	| Error String
+:: SemOutput :== Either [SemError] AST
+
+
+instance toString SemError
+
+sem :: AST -> SemOutput