module type Map_Lattice =sig..end
A map with a complete lattice structure.
include Hptmap_sig.S
include Map_lattice.Lattice
val find_or_bottom : key -> t -> vfind key t returns the value bound to key in t, or Value.bottom if
key does not belong to t.
val find_lonely_key : t -> key * vIf t is a singleton map binding k to v, then returns the pair (k,v).
Not_found otherwise.