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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2019 *)
(* <O___,, * (see CREDITS file for the list of authors) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
(* We define some high-level properties of vernacular commands, used
mainly by the UI components *)
open Vernacexpr
(* Does this vernacular involve Fail? *)
let has_Fail { CAst.v } = List.mem ControlFail v.control
(* Navigation commands are allowed in a coqtop session but not in a .v file *)
let is_navigation_vernac = function
| VernacResetInitial
| VernacResetName _
| VernacBack _ -> true
| _ -> false
(* NB: Reset is now allowed again as asked by A. Chlipala *)
let is_reset = function
| VernacResetInitial
| VernacResetName _ -> true
| _ -> false
let is_debug = function
| VernacSetOption (_, ["Ltac";"Debug"], _) -> true
| _ -> false
let is_undo = function
| VernacUndo _ | VernacUndoTo _ -> true
| _ -> false