diff options
author | Emilio Jesus Gallego Arias <e+git@x80.org> | 2018-04-24 18:21:49 +0200 |
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committer | Emilio Jesus Gallego Arias <e+git@x80.org> | 2018-05-01 01:22:00 +0200 |
commit | fca82378cd2824534383f1f5bc09d08fade1dc17 (patch) | |
tree | fe95ef8dff5e0e47cb80a54d913fd2a0c8f97ce3 /proofs/goal_select.ml | |
parent | 8f477d20f6c933537d80bd838b04d13042a12011 (diff) |
[api] Move bullets and goals selectors to `proofs/`
`Vernacexpr` lives conceptually higher than `proof`, however,
datatypes for bullets and goal selectors are in `Vernacexpr`.
In particular, we move:
- `proof_bullet`: to `Proof_bullet`
- `goal_selector`: to a new file `Goal_select`
Diffstat (limited to 'proofs/goal_select.ml')
-rw-r--r-- | proofs/goal_select.ml | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/proofs/goal_select.ml b/proofs/goal_select.ml new file mode 100644 index 000000000..65a94a2c6 --- /dev/null +++ b/proofs/goal_select.ml @@ -0,0 +1,68 @@ +(************************************************************************) +(* * 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 + } |