[proof] Attempt to deprecate some V82 parts of the proof API.

I followed what seems to be the intention of the code, with the
original intention of remove the global imperative proof state.

However, I fully fail to see why the new API is better than the old
one. In fact the opposite seems the contrary.

Still big parts of the "new proof engine" seem unfinished, and I'm
afraid I am not the right person to know what direction things should
take.

1 files changed, 5 insertions, 2 deletions

diff --git a/proofs/proof.ml b/proofs/proof.ml
index e24d57f08..413b5fdd7 100644
--- a/proofs/proof.ml
+++ b/proofs/proof.ml
@@ -163,6 +163,7 @@ let map_structured_proof pfts process_goal: 'a pre_goals =
 let rec unroll_focus pv = function
   | (_,_,ctx)::stk -> unroll_focus (Proofview.unfocus ctx pv) stk
   | [] -> pv
+
 (* spiwack: a proof is considered completed even if its still focused, if the focus
    doesn't hide any goal.
    Unfocusing is handled in {!return}. *)
@@ -391,10 +392,12 @@ let pr_proof p =
 (*** Compatibility layer with <=v8.2 ***)
 module V82 = struct
   let subgoals p =
-    Proofview.V82.goals p.proofview
+    let it, sigma = Proofview.proofview p.proofview in
+    Evd.{ it; sigma }
 
   let background_subgoals p =
-    Proofview.V82.goals (unroll_focus p.proofview p.focus_stack)
+    let it, sigma = Proofview.proofview (unroll_focus p.proofview p.focus_stack) in
+    Evd.{ it; sigma }
 
   let top_goal p =
     let { Evd.it=gls ; sigma=sigma; } =