[ [ >>parent drop ] with each ]
[ >>children drop ] 2bi ;
+: attach-parent ( node -- )
+ drop ;
+
+: make-trees ( -- trees )
+ nodes get
+ [ [ attach-parent ] each ]
+ [ [ parent>> not ] filter ] bi ;
+
ERROR: node-missing-parent trees nodes ;
ERROR: node-missing-children trees nodes ;
: verify-trees ( trees -- trees )
verify-parents verify-children ;
-: make-trees ( -- trees )
- [
- roots get [ dup , follow-tree ] each
- ] { } make verify-trees ;
-
: build-fan-in-trees ( -- )
- make-trees [
+ make-trees verify-trees [
-1/0. >>parent-index
calculate-registers drop
] each ;