Hi,

I was wondering why there has been no Ocaml library implementation
for equivalence and partial order relations (at least over basic types)
just
as we have a 'Set' library over ordered types.

For example,
an equivalence class  module may export functions such as

type t
val create_equiv:  Set.t -> eqrelation.t -> t
val query_eqclass: t -> Set.elt -> Set.t
........

If the user specifies a set of elements and the user defines the
equivalence relation
on those elements, the function should return a datatype that
can be further queried for equivalence classes of individual elements.

Is there any specific reason why such a generic library may be
hard to implement? If not, are there any implementation issues we
need to be concerned about.
Thanx.


--
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Narayanan Krishnamurthy (Nari)
ASP Advanced Tools and Methodology
Motorola SPS Architecture and Systems Platforms
Motorola Inc. Semiconductor Products Sector
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