X-Git-Url: https://git.martlubbers.net/?a=blobdiff_plain;f=sem.dcl;h=584deb567792c7e75b67360be3fab9646c8bd3a6;hb=6d70a636ed3b4573c4c81ba068ae2b46523c9465;hp=92f1d51d4860276b98a5bef237cce59b90e48807;hpb=022b8166504765b2c84138fc83dfdfaa23fe5774;p=cc1516.git

diff --git a/sem.dcl b/sem.dcl
index 92f1d51..584deb5 100644
--- a/sem.dcl
+++ b/sem.dcl
@@ -1,7 +1,22 @@
 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, :: Op2
+from StdOverloaded import class toString
 
-semanticAnalysis :: AST -> Either String AST
+:: SemError 
+	= ParseError Pos String 
+	| UnifyError Pos Type Type 
+    | FieldSelectorError Pos Type FieldSelector 
+	| OperatorError Pos Op2 Type
+    | UndeclaredVariableError Pos String
+    | ArgumentMisMatchError Pos String
+	| Error String
+:: Gamma
+:: SemOutput :== Either [SemError] (AST, Gamma)
+
+instance toString SemError
+instance toString Gamma
+
+sem :: AST -> SemOutput