X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=helm%2Focaml%2Ftactics%2FfwdSimplTactic.ml;h=ded28cc18dce03a0a9e3c2f690f0da59ee5a88d6;hb=bbe7741f3bbaacb93f2876c018dace82f5e929b8;hp=7981ac8753727962ad64f8443c13385a642b6e77;hpb=a7b90d2494f7d580faa54ecd2835bd4649129763;p=helm.git diff --git a/helm/ocaml/tactics/fwdSimplTactic.ml b/helm/ocaml/tactics/fwdSimplTactic.ml index 7981ac875..ded28cc18 100644 --- a/helm/ocaml/tactics/fwdSimplTactic.ml +++ b/helm/ocaml/tactics/fwdSimplTactic.ml @@ -26,61 +26,144 @@ module MI = CicMkImplicit module TC = CicTypeChecker module PET = ProofEngineTypes +module PEH = ProofEngineHelpers module U = CicUniv module S = CicSubstitution module PT = PrimitiveTactics +module T = Tacticals +module FNG = FreshNamesGenerator -(* -let module R = CicReduction -*) - -let fail_msg0 = "not a declaration of the current context" let fail_msg1 = "no applicable simplification" let error msg = raise (PET.Fail msg) -let rec declaration name = function - | [] -> error fail_msg0 - | Some (hyp, Cic.Decl ty) :: _ when hyp = name -> ty - | _ :: tail -> declaration name tail - (* lapply *******************************************************************) -let lapply_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[]) - ?(substs = []) what = - let rec strip_dependent_prods metasenv context ss = function - | Cic.Prod (name, t1, t2) as t -> - if TC.does_not_occur context 0 1 t2 then metasenv, ss, t else - let metasenv, index = MI.mk_implicit metasenv [] context in - let rs = MI.identity_relocation_list_for_metavariable context in - let e, s = Some (name, Cic.Decl t1), Some (Cic.Meta (index, rs)) in - strip_dependent_prods metasenv (e :: context) (s :: ss) t2 - | t -> metasenv, ss, t +let strip_dependent_prods metasenv context t = + let irl = MI.identity_relocation_list_for_metavariable context in + let mk_meta metasenv t = + let index = MI.new_meta metasenv [] in + let metasenv = [index, context, t] @ metasenv in + metasenv, Cic.Meta (index, irl) in - let update_metasenv metasenv ((xuri, _, u,t), goal) = - ((xuri, metasenv, u,t), goal) + let rec aux metasenv metas = function + | Cic.Prod (Cic.Name _ as name, t1, t2) -> + let metasenv, meta = mk_meta metasenv t1 in + aux metasenv (meta :: metas) (S.subst meta t2) + | Cic.Prod (Cic.Anonymous, t1, _) -> + let metasenv, meta = mk_meta metasenv t1 in + metasenv, metas, Some meta + | t -> metasenv, metas, None in - let lapply_tac status = - let (proof, goal) = status in - let _,metasenv,_,_ = proof in - let _,context,ty = CicUtil.lookup_meta goal metasenv in + aux metasenv [] t + +let lapply_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[]) + (* ?(substs = []) *) ?to_what what = + let letin_tac term = PT.letin_tac ~mk_fresh_name_callback term in + let lapply_tac (proof, goal) = + let xuri, metasenv, u, t = proof in + let _, context, _ = CicUtil.lookup_meta goal metasenv in let lemma, _ = TC.type_of_aux' metasenv context what U.empty_ugraph in - let metasenv, substs, stripped_lemma = strip_dependent_prods metasenv context [] lemma in - let status = update_metasenv metasenv status in - let holed_lemma = S.subst_meta substs stripped_lemma in - PET.apply_tactic (PT.cut_tac ~mk_fresh_name_callback holed_lemma) status + let lemma = FNG.clean_dummy_dependent_types lemma in + match strip_dependent_prods metasenv context lemma with + | metasenv, metas, Some meta -> + let pippo = Cic.Appl (what :: List.rev (meta :: metas)) in + Printf.eprintf "lapply: %s\n" (CicPp.ppterm pippo); flush stderr; + let outer_tac = letin_tac pippo in + let status = (xuri, metasenv, u, t), goal in + PET.apply_tactic outer_tac status + | metasenv, metas, None -> + failwith "lapply_tac: not implemented" in PET.mk_tactic lapply_tac + +(* + + + +let skip_metas p = + let rec aux conts p = + if p <= 0 then conts else aux (T.id_tac :: conts) (pred p) + in + aux [] p + +let get_conclusion context t = + let rec aux p context = function + | Cic.Prod (name, t1, t2) -> + aux (succ p) (Some (name, Cic.Decl t1) :: context) t2 + | Cic.LetIn (name, u1, t2) -> + aux (succ p) (Some (name, Cic.Def (u1, None)) :: context) t2 + | Cic.Cast (t2, t1) -> aux p context t2 + | t -> p, context, t + in aux 0 context t + +let get_conclusion_dependences context t = + let p, context, conclusion = get_conclusion context t in + let rec aux l q = + if q <= 0 then l else + let b = TC.does_not_occur context (pred q) q conclusion in + aux (b :: l) (pred q) + in + aux [] p +let solve_independents ?with_what deps = + let rec aux p conts = function + | [] -> p, conts + | true :: tl -> + let cont = PT.apply_tac ~term:(Cic.Rel (succ p)) in + aux (succ p) (cont :: conts) tl + | false :: tl -> aux (succ p) conts tl + in + let p, conts = aux 0 [] deps in + match with_what with + | None -> conts + | Some t -> PT.apply_tac ~term:(S.lift p t) :: conts + +let lapply_tac ?(mk_fresh_name_callback = FreshNamesGenerator.mk_fresh_name ~subst:[]) + (* ?(substs = []) *) ?to_what what = + let cut_tac term = PT.cut_tac ~mk_fresh_name_callback term in + let intros_tac () = PT.intros_tac ~mk_fresh_name_callback () in + let solve_conclusion_tac ?with_what p deps = + T.then_ ~start:(intros_tac ()) + ~continuation:( + T.thens ~start:(PT.apply_tac what) + ~continuations:( [ T.id_tac; T.id_tac; T.id_tac ] +(* skip_metas p @ solve_independents ?with_what deps *) + ) + ) + in + let lapply_tac (proof, goal) = + let xuri, metasenv, u, t = proof in + let _, context, _ = CicUtil.lookup_meta goal metasenv in + let lemma, _ = TC.type_of_aux' metasenv context what U.empty_ugraph in + let lemma = FNG.clean_dummy_dependent_types lemma in + match strip_dependent_prods metasenv context lemma with + | metasenv, p, Some premise, conclusion -> + let deps = get_conclusion_dependences context conclusion in + let inner_tac = match to_what with + | None -> + T.thens ~start:(cut_tac premise) + ~continuations:[ + solve_conclusion_tac ~with_what:(Cic.Rel 1) p deps; + T.id_tac + ] + | Some with_what -> + solve_conclusion_tac ~with_what p deps + in + let outer_tac = + T.thens ~start:(cut_tac conclusion) + ~continuations:[T.id_tac; T.id_tac (* inner_tac *)] + in +*) (* fwd **********************************************************************) -let fwd_simpl_tac ~hyp ~dbd = +let fwd_simpl_tac ~what ~dbd = let fwd_simpl_tac status = let (proof, goal) = status in - let _,metasenv,_,_ = proof in - let _,context,ty = CicUtil.lookup_meta goal metasenv in - let major = declaration hyp context in - match MetadataQuery.fwd_simpl ~dbd major with + let _, metasenv, _, _ = proof in + let _, context, ty = CicUtil.lookup_meta goal metasenv in + let major, _ = TC.type_of_aux' metasenv context what U.empty_ugraph in + match MetadataQuery.fwd_simpl ~dbd major with | [] -> error fail_msg1 | uri :: _ -> prerr_endline (UriManager.string_of_uri uri); (proof, []) in