X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=0d4a7d6ad8f703d14239f1b960aa9341c94e4590;hb=cba53fea01b27f46668e9025f8b04ce7a85e62d8;hp=92f1d51d4860276b98a5bef237cce59b90e48807;hpb=022b8166504765b2c84138fc83dfdfaa23fe5774;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index 92f1d51..0d4a7d6 100644
--- a/sem.dcl
+++ b/sem.dcl
@@ -1,7 +1,20 @@
 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, :: FieldSelector
+from StdOverloaded import class toString
 
-semanticAnalysis :: AST -> Either String AST
+:: SemError 
+	= ParseError Pos String 
+	| UnifyError Pos Type Type 
+    | FieldSelectorError Pos Type FieldSelector 
+    | UndeclaredVariableError Pos String
+	| Error String
+:: Gamma
+:: SemOutput :== Either [SemError] (AST, Gamma)
+
+instance toString SemError
+instance toString Gamma
+
+sem :: AST -> SemOutput