open Evd open Libnames open Coqlib open Term open Names open Util let ($) f x = f x (****************************************************************************) (* Library linking *) let contrib_name = "subtac" let subtac_dir = [contrib_name] let fix_sub_module = "FixSub" let utils_module = "Utils" let fixsub_module = subtac_dir @ [fix_sub_module] let utils_module = subtac_dir @ [utils_module] let init_constant dir s = gen_constant contrib_name dir s let init_reference dir s = gen_reference contrib_name dir s let fixsub = lazy (init_constant fixsub_module "Fix_sub") let ex_pi1 = lazy (init_constant utils_module "ex_pi1") let ex_pi2 = lazy (init_constant utils_module "ex_pi2") let make_ref l s = lazy (init_reference l s) let well_founded_ref = make_ref ["Init";"Wf"] "Well_founded" let acc_ref = make_ref ["Init";"Wf"] "Acc" let acc_inv_ref = make_ref ["Init";"Wf"] "Acc_inv" let fix_sub_ref = make_ref ["subtac";"FixSub"] "Fix_sub" let fix_measure_sub_ref = make_ref ["subtac";"FixSub"] "Fix_measure_sub" let lt_ref = make_ref ["Init";"Peano"] "lt" let lt_wf_ref = make_ref ["Wf_nat"] "lt_wf" let refl_ref = make_ref ["Init";"Logic"] "refl_equal" let make_ref s = Qualid (dummy_loc, qualid_of_string s) let sig_ref = make_ref "Init.Specif.sig" let proj1_sig_ref = make_ref "Init.Specif.proj1_sig" let proj2_sig_ref = make_ref "Init.Specif.proj2_sig" let build_sig () = { proj1 = init_constant ["Init"; "Specif"] "proj1_sig"; proj2 = init_constant ["Init"; "Specif"] "proj2_sig"; elim = init_constant ["Init"; "Specif"] "sig_rec"; intro = init_constant ["Init"; "Specif"] "exist"; typ = init_constant ["Init"; "Specif"] "sig" } let sig_ = lazy (build_sig ()) let eq_ind = lazy (init_constant ["Init"; "Logic"] "eq") let eq_rec = lazy (init_constant ["Init"; "Logic"] "eq_rec") let eq_rect = lazy (init_constant ["Init"; "Logic"] "eq_rect") let eq_refl = lazy (init_constant ["Init"; "Logic"] "refl_equal") let eq_ind_ref = lazy (init_reference ["Init"; "Logic"] "eq") let refl_equal_ref = lazy (init_reference ["Init"; "Logic"] "refl_equal") let not_ref = lazy (init_constant ["Init"; "Logic"] "not") let and_typ = lazy (Coqlib.build_coq_and ()) let eqdep_ind = lazy (init_constant [ "Logic";"Eqdep"] "eq_dep") let eqdep_rec = lazy (init_constant ["Logic";"Eqdep"] "eq_dep_rec") let eqdep_ind_ref = lazy (init_reference [ "Logic";"Eqdep"] "eq_dep") let eqdep_intro_ref = lazy (init_reference [ "Logic";"Eqdep"] "eq_dep_intro") let jmeq_ind = lazy (init_constant ["Logic";"JMeq"] "JMeq") let jmeq_rec = lazy (init_constant ["Logic";"JMeq"] "JMeq_rec") let jmeq_refl = lazy (init_constant ["Logic";"JMeq"] "JMeq_refl") let ex_ind = lazy (init_constant ["Init"; "Logic"] "ex") let ex_intro = lazy (init_reference ["Init"; "Logic"] "ex_intro") let proj1 = lazy (init_constant ["Init"; "Logic"] "proj1") let proj2 = lazy (init_constant ["Init"; "Logic"] "proj2") let boolind = lazy (init_constant ["Init"; "Datatypes"] "bool") let sumboolind = lazy (init_constant ["Init"; "Specif"] "sumbool") let natind = lazy (init_constant ["Init"; "Datatypes"] "nat") let intind = lazy (init_constant ["ZArith"; "binint"] "Z") let existSind = lazy (init_constant ["Init"; "Specif"] "sigS") let existS = lazy (build_sigma_type ()) let prod = lazy (build_prod ()) (* orders *) let well_founded = lazy (init_constant ["Init"; "Wf"] "well_founded") let fix = lazy (init_constant ["Init"; "Wf"] "Fix") let acc = lazy (init_constant ["Init"; "Wf"] "Acc") let acc_inv = lazy (init_constant ["Init"; "Wf"] "Acc_inv") let extconstr = Constrextern.extern_constr true (Global.env ()) let extsort s = Constrextern.extern_constr true (Global.env ()) (mkSort s) open Pp let my_print_constr = Termops.print_constr_env let my_print_constr_expr = Ppconstr.pr_constr_expr let my_print_rel_context env ctx = Printer.pr_rel_context env ctx let my_print_context = Termops.print_rel_context let my_print_named_context = Termops.print_named_context let my_print_env = Termops.print_env let my_print_rawconstr = Printer.pr_rawconstr_env let my_print_evardefs = Evd.pr_evar_defs let my_print_tycon_type = Evarutil.pr_tycon_type let debug_level = 2 let debug_on = true let debug n s = if debug_on then if !Options.debug && n >= debug_level then msgnl s else () else () let debug_msg n s = if debug_on then if !Options.debug && n >= debug_level then s else mt () else mt () let trace s = if debug_on then if !Options.debug && debug_level > 0 then msgnl s else () else () let rec pp_list f = function [] -> mt() | x :: y -> f x ++ spc () ++ pp_list f y let wf_relations = Hashtbl.create 10 let std_relations () = let add k v = Hashtbl.add wf_relations k v in add (init_constant ["Init"; "Peano"] "lt") (lazy (init_constant ["Arith"; "Wf_nat"] "lt_wf")) let std_relations = Lazy.lazy_from_fun std_relations type binders = Topconstr.local_binder list let app_opt c e = match c with Some constr -> constr e | None -> e let print_args env args = Array.fold_right (fun a acc -> my_print_constr env a ++ spc () ++ acc) args (str "") let make_existential loc ?(opaque = true) env isevars c = let evar = Evarutil.e_new_evar isevars env ~src:(loc, QuestionMark opaque) c in let (key, args) = destEvar evar in (try trace (str "Constructed evar " ++ int key ++ str " applied to args: " ++ print_args env args ++ str " for type: "++ my_print_constr env c) with _ -> ()); evar let make_existential_expr loc env c = let key = Evarutil.new_untyped_evar () in let evar = Topconstr.CEvar (loc, key) in debug 2 (str "Constructed evar " ++ int key); evar let string_of_hole_kind = function | ImplicitArg _ -> "ImplicitArg" | BinderType _ -> "BinderType" | QuestionMark _ -> "QuestionMark" | CasesType -> "CasesType" | InternalHole -> "InternalHole" | TomatchTypeParameter _ -> "TomatchTypeParameter" let evars_of_term evc init c = let rec evrec acc c = match kind_of_term c with | Evar (n, _) when Evd.mem evc n -> Evd.add acc n (Evd.find evc n) | Evar (n, _) -> assert(false) | _ -> fold_constr evrec acc c in evrec init c let non_instanciated_map env evd evm = List.fold_left (fun evm (key, evi) -> let (loc,k) = evar_source key !evd in debug 2 (str "evar " ++ int key ++ str " has kind " ++ str (string_of_hole_kind k)); match k with QuestionMark _ -> Evd.add evm key evi | _ -> debug 2 (str " and is an implicit"); Pretype_errors.error_unsolvable_implicit loc env evm k) Evd.empty (Evarutil.non_instantiated evm) let global_kind = Decl_kinds.IsDefinition Decl_kinds.Definition let goal_kind = Decl_kinds.Global, Decl_kinds.DefinitionBody Decl_kinds.Definition let global_proof_kind = Decl_kinds.IsProof Decl_kinds.Lemma let goal_proof_kind = Decl_kinds.Global, Decl_kinds.Proof Decl_kinds.Lemma let global_fix_kind = Decl_kinds.IsDefinition Decl_kinds.Fixpoint let goal_fix_kind = Decl_kinds.Global, Decl_kinds.DefinitionBody Decl_kinds.Fixpoint open Tactics open Tacticals let id x = x let filter_map f l = let rec aux acc = function hd :: tl -> (match f hd with Some t -> aux (t :: acc) tl | None -> aux acc tl) | [] -> List.rev acc in aux [] l let build_dependent_sum l = let rec aux names conttac conttype = function (n, t) :: ((_ :: _) as tl) -> let hyptype = substl names t in trace (spc () ++ str ("treating evar " ^ string_of_id n)); (try trace (str " assert: " ++ my_print_constr (Global.env ()) hyptype) with _ -> ()); let tac = assert_tac true (Name n) hyptype in let conttac = (fun cont -> conttac (tclTHENS tac ([intros; (tclTHENSEQ [constructor_tac (Some 1) 1 (Rawterm.ImplicitBindings [mkVar n]); cont]); ]))) in let conttype = (fun typ -> let tex = mkLambda (Name n, t, typ) in conttype (mkApp (Lazy.force ex_ind, [| t; tex |]))) in aux (mkVar n :: names) conttac conttype tl | (n, t) :: [] -> (conttac intros, conttype t) | [] -> raise (Invalid_argument "build_dependent_sum") in aux [] id id (List.rev l) open Proof_type open Tacexpr let mkProj1 a b c = mkApp (Lazy.force proj1, [| a; b; c |]) let mkProj2 a b c = mkApp (Lazy.force proj2, [| a; b; c |]) let mk_ex_pi1 a b c = mkApp (Lazy.force ex_pi1, [| a; b; c |]) let mk_ex_pi2 a b c = mkApp (Lazy.force ex_pi2, [| a; b; c |]) let mkSubset name typ prop = mkApp ((Lazy.force sig_).typ, [| typ; mkLambda (name, typ, prop) |]) let mk_eq typ x y = mkApp (Lazy.force eq_ind, [| typ; x ; y |]) let mk_eq_refl typ x = mkApp (Lazy.force eq_refl, [| typ; x |]) let mk_JMeq typ x typ' y = mkApp (Lazy.force jmeq_ind, [| typ; x ; typ'; y |]) let mk_JMeq_refl typ x = mkApp (Lazy.force jmeq_refl, [| typ; x |]) let unsafe_fold_right f = function hd :: tl -> List.fold_right f tl hd | [] -> raise (Invalid_argument "unsafe_fold_right") let mk_conj l = let conj_typ = Lazy.force and_typ in unsafe_fold_right (fun c conj -> mkApp (conj_typ, [| c ; conj |])) l let mk_not c = let notc = Lazy.force not_ref in mkApp (notc, [| c |]) let and_tac l hook = let andc = Coqlib.build_coq_and () in let rec aux ((accid, goal, tac, extract) as acc) = function | [] -> (* Singleton *) acc | (id, x, elgoal, eltac) :: tl -> let tac' = tclTHEN simplest_split (tclTHENLIST [tac; eltac]) in let proj = fun c -> mkProj2 goal elgoal c in let extract = List.map (fun (id, x, y, f) -> (id, x, y, (fun c -> f (mkProj1 goal elgoal c)))) extract in aux ((string_of_id id) ^ "_" ^ accid, mkApp (andc, [| goal; elgoal |]), tac', (id, x, elgoal, proj) :: extract) tl in let and_proof_id, and_goal, and_tac, and_extract = match l with | [] -> raise (Invalid_argument "and_tac: empty list of goals") | (hdid, x, hdg, hdt) :: tl -> aux (string_of_id hdid, hdg, hdt, [hdid, x, hdg, (fun c -> c)]) tl in let and_proofid = id_of_string (and_proof_id ^ "_and_proof") in Command.start_proof and_proofid goal_kind and_goal (hook (fun c -> List.map (fun (id, x, t, f) -> (id, x, t, f c)) and_extract)); trace (str "Started and proof"); Pfedit.by and_tac; trace (str "Applied and tac") let destruct_ex ext ex = let rec aux c acc = match kind_of_term c with App (f, args) -> (match kind_of_term f with Ind i when i = Term.destInd (Lazy.force ex_ind) && Array.length args = 2 -> let (dom, rng) = try (args.(0), args.(1)) with _ -> assert(false) in let pi1 = (mk_ex_pi1 dom rng acc) in let rng_body = match kind_of_term rng with Lambda (_, _, t) -> subst1 pi1 t | t -> rng in pi1 :: aux rng_body (mk_ex_pi2 dom rng acc) | _ -> [acc]) | _ -> [acc] in aux ex ext open Rawterm let id_of_name = function Name n -> n | Anonymous -> raise (Invalid_argument "id_of_name") let definition_message id = Options.if_verbose message ((string_of_id id) ^ " is defined") let recursive_message v = match Array.length v with | 0 -> error "no recursive definition" | 1 -> (Printer.pr_global v.(0) ++ str " is recursively defined") | _ -> hov 0 (prvect_with_sep pr_coma Printer.pr_global v ++ spc () ++ str "are recursively defined") (* Solve an obligation using tactics, return the corresponding proof term *) let solve_by_tac evi t = debug 2 (str "Solving goal using tactics: " ++ Evd.pr_evar_info evi); let id = id_of_string "H" in try Pfedit.start_proof id goal_kind evi.evar_hyps evi.evar_concl (fun _ _ -> ()); debug 2 (str "Started proof"); Pfedit.by (tclCOMPLETE t); let _,(const,_,_) = Pfedit.cook_proof () in Pfedit.delete_current_proof (); const.Entries.const_entry_body with e -> Pfedit.delete_current_proof(); raise Exit let rec string_of_list sep f = function [] -> "" | x :: [] -> f x | x :: ((y :: _) as tl) -> f x ^ sep ^ string_of_list sep f tl let string_of_intset d = string_of_list "," string_of_int (Intset.elements d) (**********************************************************) (* Pretty-printing *) open Printer open Ppconstr open Nameops open Termops open Evd let pr_meta_map evd = let ml = meta_list evd in let pr_name = function Name id -> str"[" ++ pr_id id ++ str"]" | _ -> mt() in let pr_meta_binding = function | (mv,Cltyp (na,b)) -> hov 0 (pr_meta mv ++ pr_name na ++ str " : " ++ print_constr b.rebus ++ fnl ()) | (mv,Clval(na,b,_)) -> hov 0 (pr_meta mv ++ pr_name na ++ str " := " ++ print_constr b.rebus ++ fnl ()) in prlist pr_meta_binding ml let pr_idl idl = prlist_with_sep pr_spc pr_id idl let pr_evar_info evi = let phyps = (*pr_idl (List.rev (ids_of_named_context (evar_context evi))) *) Printer.pr_named_context (Global.env()) (evar_context evi) in let pty = print_constr evi.evar_concl in let pb = match evi.evar_body with | Evar_empty -> mt () | Evar_defined c -> spc() ++ str"=> " ++ print_constr c in hov 2 (str"[" ++ phyps ++ spc () ++ str"|- " ++ pty ++ pb ++ str"]") let pr_evar_map sigma = h 0 (prlist_with_sep pr_fnl (fun (ev,evi) -> h 0 (str(string_of_existential ev)++str"=="++ pr_evar_info evi)) (to_list sigma)) let pr_constraints pbs = h 0 (prlist_with_sep pr_fnl (fun (pbty,t1,t2) -> print_constr t1 ++ spc() ++ str (match pbty with | Reduction.CONV -> "==" | Reduction.CUMUL -> "<=") ++ spc() ++ print_constr t2) pbs) let pr_evar_defs evd = let pp_evm = let evars = evars_of evd in if evars = empty then mt() else str"EVARS:"++brk(0,1)++pr_evar_map evars++fnl() in let pp_met = if meta_list evd = [] then mt() else str"METAS:"++brk(0,1)++pr_meta_map evd in v 0 (pp_evm ++ pp_met) let subtac_utils_path = make_dirpath (List.map id_of_string ["Utils";contrib_name;"Coq"]) let utils_tac s = lazy(make_kn (MPfile subtac_utils_path) (make_dirpath []) (mk_label s)) let utils_call tac args = TacArg(TacCall(dummy_loc, ArgArg(dummy_loc, Lazy.force (utils_tac tac)),args))