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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA - CNRS - LIX - LRI - PPS - Copyright 1999-2010 *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Libobject
open Proof_type
open Pp
let declare_tactic_option ?(default=Tacexpr.TacId []) name =
let default_tactic_expr : Tacexpr.glob_tactic_expr ref = ref default in
let default_tactic : Proof_type.tactic ref = ref (Tacinterp.eval_tactic !default_tactic_expr) in
let locality = ref false in
let set_default_tactic local t =
locality := local;
default_tactic_expr := t; default_tactic := Tacinterp.eval_tactic t
in
let cache (_, (local, tac)) = set_default_tactic local tac in
let load (_, (local, tac)) =
if not local then set_default_tactic local tac
in
let subst (s, (local, tac)) =
(local, Tacinterp.subst_tactic s tac)
in
let input : bool * Tacexpr.glob_tactic_expr -> obj =
declare_object
{ (default_object name) with
cache_function = cache;
load_function = (fun _ -> load);
open_function = (fun _ -> load);
classify_function = (fun (local, tac) ->
if local then Dispose else Substitute (local, tac));
subst_function = subst}
in
let put local tac =
set_default_tactic local tac;
Lib.add_anonymous_leaf (input (local, tac))
in
let get () = !locality, !default_tactic in
let print () =
Pptactic.pr_glob_tactic (Global.env ()) !default_tactic_expr ++
(if !locality then str" (locally defined)" else str" (globally defined)")
in
let freeze () = !locality, !default_tactic_expr in
let unfreeze (local, t) = set_default_tactic local t in
let init () = () in
Summary.declare_summary name
{ Summary.freeze_function = freeze;
Summary.unfreeze_function = unfreeze;
Summary.init_function = init };
put, get, print
|
