Parse type declarations

lib/Language/Elna/Frontend/NameAnalysis.hs

@@ -71,12 +71,19 @@ program symbolTable (AST.Program declarations) = do
     foldM declaration globalTable declarations
 
 procedureDeclaration :: SymbolTable -> AST.Declaration -> NameAnalysis SymbolTable
-procedureDeclaration globalTable (AST.ProcedureDeclaration identifier parameters _ _) = do
-    parametersInfo <- mapM (parameter globalTable) parameters
-    let procedureInfo = ProcedureInfo SymbolTable.empty
-            $ Vector.fromList parametersInfo
-    maybe (NameAnalysis $ throwE $ IdentifierAlreadyDefinedError identifier) pure
-        $ SymbolTable.enter identifier procedureInfo globalTable
+procedureDeclaration globalTable = \case
+    (AST.ProcedureDeclaration identifier parameters _ _)
+        -> mapM (parameter globalTable) parameters
+        >>= enterOrFail identifier
+        . ProcedureInfo SymbolTable.empty
+        . Vector.fromList
+    (AST.TypeDefinition identifier typeExpression)
+        -> dataType globalTable typeExpression
+        >>= enterOrFail identifier . SymbolTable.TypeInfo
+  where
+    enterOrFail identifier declarationInfo =
+        maybe (NameAnalysis $ throwE $ IdentifierAlreadyDefinedError identifier) pure
+            $ SymbolTable.enter identifier declarationInfo globalTable
 
 declaration :: SymbolTable -> AST.Declaration -> NameAnalysis SymbolTable
 declaration globalTable (AST.ProcedureDeclaration identifier parameters variables body) = do
@@ -92,6 +99,7 @@ declaration globalTable (AST.ProcedureDeclaration identifier parameters variable
     updater procedureTable (ProcedureInfo _ parameters') = Just
         $ ProcedureInfo procedureTable parameters'
     updater _ _ = Nothing
+declaration globalTable (AST.TypeDefinition _ _) = pure globalTable
 
 parameterToVariableInfo :: SymbolTable -> AST.Parameter -> NameAnalysis (Identifier, Info)
 parameterToVariableInfo symbolTable (AST.Parameter identifier typeExpression isReferenceParameter')