[ library(m_tree234) | Reference Manual | Alphabetic Index ]
upper_bound_search(+Tree, ++SearchKey, ?Key, ?Value)
Search a tree for the largest key no larger than SearchKey.
- A 2-3-4 tree
- A key to search for
- The key found
- The value corresponding to Key
This predicate searches the tree Tree for the entry with the
largest key which is no larger than SearchKey. If such a key is
found, then it attempts to unify it with Key and the corresponding
value with Value.
This predicate should only be called with trees created by other
predicates from the tree234 module.
Fails if there are no keys at least as large as SearchKey in Tree or if Key and Value do not unify with the key and value found.
lower_bound_search / 4, lower_bound_lookup / 4, upper_bound_lookup / 4