Inline ++to-list.
+|
::
++ to-list
- :> todo: copy over or something.
+ :> creates a list of pairs from the tree.
|* a/(map)
- ~(tap by a)
+ =| b/(list _n.-.a)
+ |-
+ ^+ b
+ ?~ a
+ b
+ $(a r.a, b [n.a $(a l.a)])
::
++ from-list
:> creates a tree from a list.
