diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/edit.ml | 22 | ||||
| -rw-r--r-- | lib/edit.mli | 7 |
2 files changed, 29 insertions, 0 deletions
diff --git a/lib/edit.ml b/lib/edit.ml index 096fa5dc13..06a55d171d 100644 --- a/lib/edit.ml +++ b/lib/edit.ml @@ -84,6 +84,28 @@ let undo e n = errorlabstrm "Edit.undo" (str"Undo stack exhausted"); repeat n Bstack.pop bs +(* Return the depth of the focused proof of [e] stack, this is used to + put informations in coq prompt (in emacs mode). *) +let depth e = + match e.focus with + | None -> invalid_arg "Edit.depth" + | Some d -> + let (bs,_) = Hashtbl.find e.buf d in + Bstack.depth bs + +(* Undo focused proof of [e] to reach depth [n] *) +let undo_todepth e n = + match e.focus with + | None -> + if n <> 0 + then errorlabstrm "Edit.undo_todepth" (str"No proof in progress") + else () (* if there is no proof in progress, then n must be zero *) + | Some d -> + let (bs,_) = Hashtbl.find e.buf d in + if Bstack.depth bs < n then + errorlabstrm "Edit.undo_todepth" (str"Undo stack would be exhausted"); + repeat (Bstack.depth bs - n) Bstack.pop bs + let create e (d,b,c,udepth) = if Hashtbl.mem e.buf d then errorlabstrm "Edit.create" diff --git a/lib/edit.mli b/lib/edit.mli index 0bd802fcc3..d13d9c6f69 100644 --- a/lib/edit.mli +++ b/lib/edit.mli @@ -54,3 +54,10 @@ val delete : ('a,'b,'c) t -> 'a -> unit val dom : ('a,'b,'c) t -> 'a list val clear : ('a,'b,'c) t -> unit + +(* [depth e] Returns the depth of the focused proof stack of [e], this + is used to put informations in coq prompt (in emacs mode). *) +val depth : ('a,'b,'c) t -> int + +(* [undo_todepth e n] Undoes focused proof of [e] to reach depth [n] *) +val undo_todepth : ('a,'b,'c) t -> int -> unit |