use can_be(list, _) in all solutions predicates

2019-03-30 10:44:49 -06:00
parent 5a30c7b9be
commit 8945bae70b
5 changed files with 15 additions and 20 deletions
--- a/src/prolog/heap_print.rs
+++ b/src/prolog/heap_print.rs
@@ -56,7 +56,7 @@ impl<'a> HCPreOrderIterator<'a> {
    /*
     * descend into the subtree where the iterator is currently parked
     * and check that the leftmost leaf is a number, with every node
-     * encountered on the way an infix or postfix operator, and not blocked
+     * encountered on the way an infix or postfix operator, unblocked
     * by brackets.
     */
    fn leftmost_leaf_is_positive_number(&self) -> bool {