X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=a2bcd572e08683f42b0d5d8d953dc98c4157a8c7;hb=3b2d959ee14ecfd95008dfe536c87b8b1629c1ae;hp=92f1d51d4860276b98a5bef237cce59b90e48807;hpb=022b8166504765b2c84138fc83dfdfaa23fe5774;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index 92f1d51..a2bcd57 100644
--- a/sem.dcl
+++ b/sem.dcl
@@ -1,7 +1,19 @@
 definition module sem
 
+import qualified Data.Map as Map
 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
+:: Gamma
+:: SemOutput :== Either [SemError] (AST, Gamma)
+
+instance toString SemError
+instance toString Gamma
+
+sem :: AST -> SemOutput