package codex

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Module Make.UnionFindSource

Union find structure: some terms points to their parents through the set of relations, allowing for accurate representation of relations in the group and storing fewer independent terms.

Sourcetype 'a t = 'a t
Sourcetype ('a, 'b) relation = ('a, 'b) Relation.t
Sourcetype 'a node_through_relation =
  1. | NodeThoughRelation : 'b t * ('a, 'b) relation -> 'a node_through_relation

Existential wrapper for returning the representative

Sourceval find_representative : 'a t -> 'a node_through_relation

Find the representative of a node, and the associated relation

check_related a b returns the relation between a and b if they are in the same class.

Sourceval union : 'a t -> 'b t -> ('a, 'b) relation -> (unit, ('a, 'b) relation) result

union m n r adds the m--(r)-->n relation to the union find returns Ok () on success, Error rel if m and n are already related via another relation rel and r != rel.