Immutable infered types

Src/AST/Myc.Ast.Nodes.pas

@@ -7,7 +7,8 @@ uses
     System.Generics.Collections,
     Myc.Data.Scalar,
     Myc.Data.Value,
-    Myc.Data.Keyword;
+    Myc.Data.Keyword,
+    Myc.Ast.Types;
 
 type
     // --- Forward Declarations to break cycles ---
@@ -39,6 +40,7 @@ type
     IRecurNode = interface;
     INopNode = interface;
     IBoundIdentifierNode = interface;
+    IAstTypedNode = interface;
 
     // Defines the concrete kinds of AST nodes
     TAstNodeKind = (
@@ -157,13 +159,21 @@ type
         function AsAddSeriesItem: IAddSeriesItemNode;
         function AsSeriesLength: ISeriesLengthNode;
         function AsRecur: IRecurNode;
-        function AsNop: INopNode; // Added Nop
+        function AsNop: INopNode;
 
         function AsBoundIdentifierNode: IBoundIdentifierNode;
+        function AsTypedNode: IAstTypedNode;
 
         property Kind: TAstNodeKind read GetKind;
     end;
 
+    IAstTypedNode = interface(IAstNode)
+        {$region 'private'}
+        function GetStaticType: IStaticType;
+        {$endregion}
+        property StaticType: IStaticType read GetStaticType;
+    end;
+
     INopNode = interface(IAstNode)
     // A placeholder node for the UI (e.g., drag target).
     // This node is illegal during compilation.