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(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2017 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
(* We define some high-level properties of vernacular commands, used
mainly by the UI components *)
open Vernacexpr
(* Navigation commands are allowed in a coqtop session but not in a .v file *)
let rec is_navigation_vernac = function
| VernacResetInitial
| VernacResetName _
| VernacBacktrack _
| VernacBackTo _
| VernacBack _ -> true
| VernacRedirect (_, (_,c))
| VernacTime (_,c) ->
is_navigation_vernac c (* Time Back* is harmless *)
| c -> is_deep_navigation_vernac c
and is_deep_navigation_vernac = function
| VernacTimeout (_,c) | VernacFail c -> is_navigation_vernac c
| _ -> false
(* NB: Reset is now allowed again as asked by A. Chlipala *)
let is_reset = function
| VernacResetInitial | VernacResetName _ -> true
| _ -> false
let is_debug cmd = match cmd with
| VernacSetOption (["Ltac";"Debug"], _) -> true
| _ -> false
let is_query cmd = match cmd with
| VernacChdir None
| VernacMemOption _
| VernacPrintOption _
| VernacCheckMayEval _
| VernacGlobalCheck _
| VernacPrint _
| VernacSearch _
| VernacLocate _ -> true
| _ -> false
let is_undo cmd = match cmd with
| VernacUndo _ | VernacUndoTo _ -> true
| _ -> false
|
