simplify: no distinction between generic types and 'normal' types.

progress.txt

@@ -1,12 +1,20 @@
 done:
-  - everything is properly typed, up to the meta-circular level
   - primitives
-  - structures: list, product, sum
+  - structures: list, product, sum, ...
       can compose structures, e.g., create list of list of product of sum of ...
-      list type is specialized for ListOfByte to use Uint8Array
-  - generic types and type inferencing
+      set and dictionary implemented as purely functional red-black tree
+        keys allowed: (anything with total ordering)
+          - primitive values
+          - structural values
+          - dynamically typed values
+          - types
+  - generic types and type unification (inferencing)
+  - recursive types
 
 todo:
+  - dynamically typed values: have 'Any' or 'Top' type?
+  
+
   - to support sets of slots, need comparison of slots
       => comparison of values
         => problem: how to compare transformed values? their inputs can come from different types
@@ -19,6 +27,5 @@ todo:
 
       (b) dirty: use 'magic' function that compares any JS value
 
-  - typeclass mechanism
+  - interfaces (type classes)
 
-  - what about type links: they connect anything to its type... what is the type of 'anything'?