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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * INRIA, CNRS and contributors - Copyright 1999-2018 *)
(* <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) *)
(************************************************************************)
open Names
(* spiwack: I'm choosing, for now, to have [goal_selector] be a
different type than [goal_reference] mostly because if it makes sense
to print a goal that is out of focus (or already solved) it doesn't
make sense to apply a tactic to it. Hence it the types may look very
similar, they do not seem to mean the same thing. *)
type t =
| SelectAlreadyFocused
| SelectNth of int
| SelectList of (int * int) list
| SelectId of Id.t
| SelectAll
(* Default goal selector: selector chosen when a tactic is applied
without an explicit selector. *)
let default_goal_selector = ref (SelectNth 1)
let get_default_goal_selector () = !default_goal_selector
let pr_range_selector (i, j) =
if i = j then Pp.int i
else Pp.(int i ++ str "-" ++ int j)
let pr_goal_selector = function
| SelectAlreadyFocused -> Pp.str "!"
| SelectAll -> Pp.str "all"
| SelectNth i -> Pp.int i
| SelectList l ->
Pp.(str "["
++ prlist_with_sep pr_comma pr_range_selector l
++ str "]")
| SelectId id -> Names.Id.print id
let parse_goal_selector = function
| "!" -> SelectAlreadyFocused
| "all" -> SelectAll
| i ->
let err_msg = "The default selector must be \"all\" or a natural number." in
begin try
let i = int_of_string i in
if i < 0 then CErrors.user_err Pp.(str err_msg);
SelectNth i
with Failure _ -> CErrors.user_err Pp.(str err_msg)
end
let _ = let open Goptions in
declare_string_option
{ optdepr = false;
optname = "default goal selector" ;
optkey = ["Default";"Goal";"Selector"] ;
optread = begin fun () ->
Pp.string_of_ppcmds
(pr_goal_selector !default_goal_selector)
end;
optwrite = begin fun n ->
default_goal_selector := parse_goal_selector n
end
}
|
