- minimal changes: doc-string of Node; TODO.md added

DHParser/syntaxtree.py

@@ -202,7 +202,7 @@ class Node(collections.abc.Sized):
         len (int):  The full length of the node's string result if the
             node is a leaf node or, otherwise, the concatenated string
             result's of its descendants. The figure always represents
-            the length before AST-transformation ans will never change
+            the length before AST-transformation and will never change
             through AST-transformation. READ ONLY!
         pos (int):  the position of the node within the parsed text.
 
@@ -215,9 +215,8 @@ class Node(collections.abc.Sized):
             after parsing.
 
             Other than that, this value should be considered READ ONLY.
-            At any rate, it should only be reassigned only during
-            parsing stage and never during or after the
-            AST-transformation.
+            At any rate, it should only be reassigned during the parsing
+            stage and never during or after the AST-transformation.
     """
 
     __slots__ = ['_result', 'children', '_errors', '_len', '_pos', 'parser', 'error_flag']

TODO.md

+General TODO-List
+-----------------
+
+- Position Handling: `Node._pos` and `Node._len` should be set by 
+  parser guard to allow for early dropping of nodes. (Should speed
+  up tree-traversal later)
+ 
\ No newline at end of file