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|
(************************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * CNRS-Ecole Polytechnique-INRIA Futurs-Universite Paris Sud *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(************************************************************************)
open Ast
open Coqast
open Equality
open Hipattern
open Names
open Pp
open Proof_type
open Tacticals
open Tacinterp
open Tactics
open Term
open Util
open Vernacinterp
open Tacexpr
(* Rewriting rules *)
type rew_rule = constr * bool * glob_tactic_expr
(* Summary and Object declaration *)
let rewtab =
ref (Stringmap.empty : rew_rule list Stringmap.t)
let _ =
let init () = rewtab := Stringmap.empty in
let freeze () = !rewtab in
let unfreeze fs = rewtab := fs in
Summary.declare_summary "autorewrite"
{ Summary.freeze_function = freeze;
Summary.unfreeze_function = unfreeze;
Summary.init_function = init;
Summary.survive_module = false;
Summary.survive_section = false }
type raw_rew_rule = constr * bool * raw_tactic_expr
(* Applies all the rules of one base *)
let one_base tac_main bas =
let lrul =
try
Stringmap.find bas !rewtab
with Not_found ->
errorlabstrm "AutoRewrite"
(str ("Rewriting base "^(bas)^" does not exist"))
in
let lrul = List.map (fun (c,b,t) -> (c,b,Tacinterp.eval_tactic t)) lrul in
tclREPEAT_MAIN (tclPROGRESS (List.fold_left (fun tac (csr,dir,tc) ->
tclTHEN tac
(tclREPEAT_MAIN
(tclTHENSFIRSTn (general_rewrite dir csr) [|tac_main|] tc)))
tclIDTAC lrul))
(* The AutoRewrite tactic *)
let autorewrite tac_main lbas =
tclREPEAT_MAIN (tclPROGRESS
(List.fold_left (fun tac bas ->
tclTHEN tac (one_base tac_main bas)) tclIDTAC lbas))
(* Functions necessary to the library object declaration *)
let cache_hintrewrite (_,(rbase,lrl)) =
let l =
try
lrl @ Stringmap.find rbase !rewtab
with
| Not_found -> lrl
in
rewtab:=Stringmap.add rbase l !rewtab
let export_hintrewrite x = Some x
let subst_hintrewrite (_,subst,(rbase,list as node)) =
let subst_first (cst,b,t as pair) =
let cst' = Term.subst_mps subst cst in
let t' = Tacinterp.subst_tactic subst t in
if cst == cst' & t == t' then pair else
(cst',b,t)
in
let list' = list_smartmap subst_first list in
if list' == list then node else
(rbase,list')
let classify_hintrewrite (_,x) = Libobject.Substitute x
(* Declaration of the Hint Rewrite library object *)
let (in_hintrewrite,out_hintrewrite)=
Libobject.declare_object {(Libobject.default_object "HINT_REWRITE") with
Libobject.open_function = (fun i o -> if i=1 then cache_hintrewrite o);
Libobject.cache_function = cache_hintrewrite;
Libobject.subst_function = subst_hintrewrite;
Libobject.classify_function = classify_hintrewrite;
Libobject.export_function = export_hintrewrite }
(* To add rewriting rules to a base *)
let add_rew_rules base lrul =
let lrul = List.rev_map (fun (c,b,t) -> (c,b,Tacinterp.glob_tactic t)) lrul in
Lib.add_anonymous_leaf (in_hintrewrite (base,lrul))
|
