
keys(+Tree, -KeyList)

   Return all the keys from a tree.

Arguments
   Tree                A 2-3-4 tree
   KeyList             A list of all the keys from Tree

Type
   library(m_tree234)

Description
	
	KeyList is a list of all the keys appearing in the tree Tree.
	
	
	This predicate should only be called with trees created by other
	predicates from the tree234 module.
	
	

Fail Conditions
   Never fails.

Resatisfiable
   no

See Also
   values / 2
