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-rw-r--r--lib/rtree.ml4
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/rtree.ml b/lib/rtree.ml
index efcb6aae1..504cc67a0 100644
--- a/lib/rtree.ml
+++ b/lib/rtree.ml
@@ -167,6 +167,10 @@ let rec inter cmp interlbl def n histo t t' =
let inter cmp interlbl def t t' = inter cmp interlbl def 0 [] t t'
+(** Inclusion of rtrees. We may want a more efficient implementation. *)
+let incl cmp interlbl def t t' =
+ equal cmp t (inter cmp interlbl def t t')
+
(** Tests if a given tree is infinite, i.e. has a branch of infinite length.
This corresponds to a cycle when visiting the expanded tree.
We use a specific comparison to detect already seen trees. *)