Adding informative variant of shelve_unifiable returning set of shelved evars.

2 files changed, 11 insertions, 2 deletions

diff --git a/engine/proofview.ml b/engine/proofview.ml
index 22271dd02..b7014c542 100644
--- a/engine/proofview.ml
+++ b/engine/proofview.ml
@@ -710,13 +710,19 @@ let partition_unifiable sigma l =
 (** Shelves the unifiable goals under focus, i.e. the goals which
     appear in other goals under focus (the unfocused goals are not
     considered). *)
-let shelve_unifiable =
+let shelve_unifiable_informative =
   let open Proof in
   Pv.get >>= fun initial ->
   let (u,n) = partition_unifiable initial.solution initial.comb in
   Comb.set n >>
   InfoL.leaf (Info.Tactic (fun () -> Pp.str"shelve_unifiable")) >>
-  Shelf.modify (fun gls -> gls @ CList.map drop_state u)
+  let u = CList.map drop_state u in
+  Shelf.modify (fun gls -> gls @ u) >>
+  tclUNIT u
+
+let shelve_unifiable =
+  let open Proof in
+  shelve_unifiable_informative >>= fun _ -> tclUNIT ()
 
 (** [guard_no_unifiable] returns the list of unifiable goals if some
     goals are unifiable (see {!shelve_unifiable}) in the current focus. *)
diff --git a/engine/proofview.mli b/engine/proofview.mli
index e7be66552..804f1543d 100644
--- a/engine/proofview.mli
+++ b/engine/proofview.mli
@@ -326,6 +326,9 @@ val unifiable : Evd.evar_map -> Evar.t -> Evar.t list -> bool
     considered). *)
 val shelve_unifiable : unit tactic
 
+(** Idem but also returns the list of shelved variables *)
+val shelve_unifiable_informative : Evar.t list tactic
+
 (** [guard_no_unifiable] returns the list of unifiable goals if some
     goals are unifiable (see {!shelve_unifiable}) in the current focus. *)
 val guard_no_unifiable : Names.Name.t list option tactic