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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 *)
(************************************************************************)
(* $Id$ *)
open Pp
open Util
open Names
open Nameops
open Term
open Termops
open Sign
open Environ
open Evd
open Evarutil
open Proof_type
open Refiner
open Proof_trees
open Logic
open Reduction
open Reductionops
open Tacmach
open Evar_refiner
open Rawterm
open Pattern
open Tacexpr
open Clenv
(* This function put casts around metavariables whose type could not be
* infered by the refiner, that is head of applications, predicates and
* subject of Cases.
* Does check that the casted type is closed. Anyway, the refiner would
* fail in this case... *)
let clenv_cast_meta clenv =
let rec crec u =
match kind_of_term u with
| App _ | Case _ -> crec_hd u
| Cast (c,_,_) when isMeta c -> u
| _ -> map_constr crec u
and crec_hd u =
match kind_of_term (strip_outer_cast u) with
| Meta mv ->
(try
let b = Typing.meta_type clenv.evd mv in
if occur_meta b then u
else mkCast (mkMeta mv, DEFAULTcast, b)
with Not_found -> u)
| App(f,args) -> mkApp (crec_hd f, Array.map crec args)
| Case(ci,p,c,br) ->
mkCase (ci, crec_hd p, crec_hd c, Array.map crec br)
| _ -> u
in
crec
let clenv_refine clenv gls =
tclTHEN
(tclEVARS (evars_of clenv.evd))
(refine (clenv_cast_meta clenv (clenv_value clenv)))
gls
let res_pf clenv ?(allow_K=false) gls =
clenv_refine (clenv_unique_resolver allow_K clenv gls) gls
let elim_res_pf_THEN_i clenv tac gls =
let clenv' = (clenv_unique_resolver true clenv gls) in
tclTHENLASTn (clenv_refine clenv') (tac clenv') gls
let e_res_pf clenv gls =
clenv_refine (evar_clenv_unique_resolver clenv gls) gls
(* [unifyTerms] et [unify] ne semble pas gérer les Meta, en
particulier ne semblent pas vérifier que des instances différentes
d'une même Meta sont compatibles. D'ailleurs le "fst" jette les metas
provenant de w_Unify. (Utilisé seulement dans prolog.ml) *)
(* let unifyTerms m n = walking (fun wc -> fst (w_Unify CONV m n [] wc)) *)
let unifyTerms m n gls =
let env = pf_env gls in
let evd = create_goal_evar_defs (project gls) in
let evd' = Unification.w_unify false env CONV m n evd in
tclIDTAC {it = gls.it; sigma = evars_of evd'}
let unify m gls =
let n = pf_concl gls in unifyTerms m n gls
|
