diff options
| -rw-r--r-- | proofs/pfedit.ml | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/proofs/pfedit.ml b/proofs/pfedit.ml index 9be475ac4..02401dc03 100644 --- a/proofs/pfedit.ml +++ b/proofs/pfedit.ml @@ -36,8 +36,10 @@ let delete_proof = Proof_global.discard let delete_current_proof = Proof_global.discard_current let delete_all_proofs = Proof_global.discard_all -let undo n = +let undo n = let p = Proof_global.give_me_the_proof () in + let d = Proof.V82.depth p in + if n >= d then raise Proof.EmptyUndoStack; for i = 1 to n do Proof.undo p done @@ -65,11 +67,7 @@ let start_proof id str hyps c ?init_tac ?compute_guard hook = Proof_global.start_proof id str goals ?compute_guard hook; Option.iter Proof_global.run_tactic init_tac -let restart_proof () = - let p = Proof_global.give_me_the_proof () in - try while true do - Proof.undo p - done with Proof.EmptyUndoStack -> () +let restart_proof () = undo_todepth 1 let resume_last_proof () = Proof_global.resume_last () let resume_proof (_,id) = Proof_global.resume id |