Making AST node inmmutable - WIP

Src/AST/Myc.Ast.TypeChecker.pas

@@ -137,7 +137,7 @@ end;
 function TTypeChecker.VisitVariableDeclaration(const Node: IVariableDeclarationNode): IAstNode;
 var
     initType: IStaticType;
-    boundIdent: TIdentifierNode;
+    boundIdent: IIdentifierNode;
     adr: TResolvedAddress;
 begin
     // 1. Visit children first (Identifier is leaf, Initializer is traversed)
@@ -149,9 +149,9 @@ begin
     else
         initType := TTypes.Void;
 
-    // 3. Get the address from the bound identifier.
-    boundIdent := (Node.Identifier as TIdentifierNode);
-    adr := boundIdent.Address;
+    // 3. Get the address from the bound identifier (SAFE CAST)
+    boundIdent := Node.Identifier;
+    adr := boundIdent.AsBoundIdentifierNode.Address;
 
     // 4. Update the type in the scope descriptor (which was set to Unknown by the binder).
     FCurrentDescriptor.UpdateType(adr.SlotIndex, initType);