src/HOL/Tools/datatype_package.ML
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sane interface for simprocs;
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(*  Title:      HOL/Tools/datatype_package.ML
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    ID:         $Id$
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    Author:     Stefan Berghofer, TU Muenchen
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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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Datatype package for Isabelle/HOL.
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*)
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signature BASIC_DATATYPE_PACKAGE =
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sig
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  val induct_tac : string -> int -> tactic
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  val induct_thm_tac : thm -> string -> int -> tactic
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  val case_tac : string -> int -> tactic
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  val distinct_simproc : simproc
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end;
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signature DATATYPE_PACKAGE =
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sig
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  include BASIC_DATATYPE_PACKAGE
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  val quiet_mode : bool ref
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  val add_datatype : bool -> string list -> (string list * bstring * mixfix *
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    (bstring * string list * mixfix) list) list -> theory -> theory *
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      {distinct : thm list list,
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       inject : thm list list,
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       exhaustion : thm list,
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       rec_thms : thm list,
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       case_thms : thm list list,
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       split_thms : (thm * thm) list,
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       induction : thm,
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       size : thm list,
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       simps : thm list}
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  val add_datatype_i : bool -> string list -> (string list * bstring * mixfix *
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    (bstring * typ list * mixfix) list) list -> theory -> theory *
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      {distinct : thm list list,
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       inject : thm list list,
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       exhaustion : thm list,
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       rec_thms : thm list,
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       case_thms : thm list list,
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       split_thms : (thm * thm) list,
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       induction : thm,
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       size : thm list,
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       simps : thm list}
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  val rep_datatype_i : string list option -> (thm list * theory attribute list) list list ->
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    (thm list * theory attribute list) list list -> (thm list * theory attribute list) ->
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    theory -> theory *
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      {distinct : thm list list,
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       inject : thm list list,
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       exhaustion : thm list,
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       rec_thms : thm list,
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       case_thms : thm list list,
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       split_thms : (thm * thm) list,
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       induction : thm,
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       size : thm list,
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       simps : thm list}
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  val rep_datatype : string list option -> (xstring * Args.src list) list list ->
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    (xstring * Args.src list) list list -> xstring * Args.src list -> theory -> theory *
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      {distinct : thm list list,
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       inject : thm list list,
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       exhaustion : thm list,
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       rec_thms : thm list,
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       case_thms : thm list list,
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       split_thms : (thm * thm) list,
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       induction : thm,
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       size : thm list,
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       simps : thm list}
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  val get_datatypes : theory -> DatatypeAux.datatype_info Symtab.table
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  val get_datatypes_sg : Sign.sg -> DatatypeAux.datatype_info Symtab.table
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  val print_datatypes : theory -> unit
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  val datatype_info_sg : Sign.sg -> string -> DatatypeAux.datatype_info option
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  val datatype_info : theory -> string -> DatatypeAux.datatype_info option
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  val datatype_info_sg_err : Sign.sg -> string -> DatatypeAux.datatype_info
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  val datatype_info_err : theory -> string -> DatatypeAux.datatype_info
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  val constrs_of : theory -> string -> term list option
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  val constrs_of_sg : Sign.sg -> string -> term list option
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  val case_const_of : theory -> string -> term option
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  val weak_case_congs_of : theory -> thm list
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  val weak_case_congs_of_sg : Sign.sg -> thm list
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  val setup: (theory -> theory) list
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end;
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structure DatatypePackage : DATATYPE_PACKAGE =
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struct
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open DatatypeAux;
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val quiet_mode = quiet_mode;
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(* data kind 'HOL/datatypes' *)
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structure DatatypesArgs =
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struct
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  val name = "HOL/datatypes";
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  type T = datatype_info Symtab.table;
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  val empty = Symtab.empty;
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  val copy = I;
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  val prep_ext = I;
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  val merge: T * T -> T = Symtab.merge (K true);
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  fun print sg tab =
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    Pretty.writeln (Pretty.strs ("datatypes:" ::
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      map #1 (Sign.cond_extern_table sg Sign.typeK tab)));
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end;
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structure DatatypesData = TheoryDataFun(DatatypesArgs);
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val get_datatypes_sg = DatatypesData.get_sg;
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val get_datatypes = DatatypesData.get;
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val put_datatypes = DatatypesData.put;
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val print_datatypes = DatatypesData.print;
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(** theory information about datatypes **)
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fun datatype_info_sg sg name = Symtab.lookup (get_datatypes_sg sg, name);
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fun datatype_info_sg_err sg name = (case datatype_info_sg sg name of
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      Some info => info
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    | None => error ("Unknown datatype " ^ quote name));
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val datatype_info = datatype_info_sg o Theory.sign_of;
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fun datatype_info_err thy name = (case datatype_info thy name of
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      Some info => info
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    | None => error ("Unknown datatype " ^ quote name));
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fun constrs_of_sg sg tname = (case datatype_info_sg sg tname of
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   Some {index, descr, ...} =>
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     let val (_, _, constrs) = the (assoc (descr, index))
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     in Some (map (fn (cname, _) => Const (cname, the (Sign.const_type sg cname))) constrs)
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     end
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 | _ => None);
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val constrs_of = constrs_of_sg o Theory.sign_of;
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fun case_const_of thy tname = (case datatype_info thy tname of
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   Some {case_name, ...} => Some (Const (case_name, the (Sign.const_type
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     (Theory.sign_of thy) case_name)))
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 | _ => None);
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val weak_case_congs_of_sg = map (#weak_case_cong o #2) o Symtab.dest o get_datatypes_sg;
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val weak_case_congs_of = weak_case_congs_of_sg o Theory.sign_of;
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fun find_tname var Bi =
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  let val frees = map dest_Free (term_frees Bi)
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      val params = Logic.strip_params Bi;
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  in case assoc (frees @ params, var) of
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       None => error ("No such variable in subgoal: " ^ quote var)
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     | Some(Type (tn, _)) => tn
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     | _ => error ("Cannot determine type of " ^ quote var)
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  end;
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fun infer_tname state i aterm =
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  let
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    val sign = Thm.sign_of_thm state;
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    val (_, _, Bi, _) = Thm.dest_state (state, i)
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    val params = Logic.strip_params Bi;   (*params of subgoal i*)
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    val params = rev (rename_wrt_term Bi params);   (*as they are printed*)
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    val (types, sorts) = types_sorts state;
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    fun types' (a, ~1) = (case assoc (params, a) of None => types(a, ~1) | sm => sm)
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      | types' ixn = types ixn;
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    val (ct, _) = read_def_cterm (sign, types', sorts) [] false (aterm, TypeInfer.logicT);
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  in case #T (rep_cterm ct) of
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       Type (tn, _) => tn
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     | _ => error ("Cannot determine type of " ^ quote aterm)
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  end;
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(*Warn if the (induction) variable occurs Free among the premises, which
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  usually signals a mistake.  But calls the tactic either way!*)
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fun occs_in_prems tacf vars =
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  SUBGOAL (fn (Bi, i) =>
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           (if  exists (fn Free (a, _) => a mem vars)
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                      (foldr add_term_frees (#2 (strip_context Bi), []))
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             then warning "Induction variable occurs also among premises!"
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             else ();
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            tacf i));
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(* generic induction tactic for datatypes *)
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local
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fun prep_var (Var (ixn, _), Some x) = Some (implode (tl (explode (Syntax.string_of_vname ixn))), x)
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  | prep_var _ = None;
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fun prep_inst (concl, xs) =	(*exception LIST*)
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  let val vs = InductAttrib.vars_of concl
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  in mapfilter prep_var (Library.drop (length vs - length xs, vs) ~~ xs) end;
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in
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fun gen_induct_tac (varss, opt_rule) i state =
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  let
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    val (_, _, Bi, _) = Thm.dest_state (state, i);
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    val {sign, ...} = Thm.rep_thm state;
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    val (rule, rule_name) =
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      (case opt_rule of
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        Some r => (r, "Induction rule")
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      | None =>
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          let val tn = find_tname (hd (mapfilter I (flat varss))) Bi
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          in (#induction (datatype_info_sg_err sign tn), "Induction rule for type " ^ tn) end);
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    val concls = HOLogic.dest_concls (Thm.concl_of rule);
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    val insts = flat (map prep_inst (concls ~~ varss)) handle LIST _ =>
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      error (rule_name ^ " has different numbers of variables");
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  in occs_in_prems (Tactic.res_inst_tac insts rule) (map #2 insts) i state end;
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fun induct_tac s = gen_induct_tac (map (Library.single o Some) (Syntax.read_idents s), None);
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fun induct_thm_tac th s =
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  gen_induct_tac ([map Some (Syntax.read_idents s)], Some th);
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end;
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(* generic case tactic for datatypes *)
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fun case_inst_tac t rule i state =
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  let
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    val _ $ Var (ixn, _) $ _ = HOLogic.dest_Trueprop
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      (hd (Logic.strip_assums_hyp (hd (Thm.prems_of rule))));
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    val exh_vname = implode (tl (explode (Syntax.string_of_vname ixn)));
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  in Tactic.res_inst_tac [(exh_vname, t)] rule i state end;
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fun gen_case_tac (t, Some rule) i state = case_inst_tac t rule i state
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  | gen_case_tac (t, None) i state =
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      let val tn = infer_tname state i t in
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        if tn = HOLogic.boolN then Tactic.res_inst_tac [("P", t)] case_split_thm i state
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        else case_inst_tac t (#exhaustion (datatype_info_sg_err (Thm.sign_of_thm state) tn)) i state
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      end;
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fun case_tac t = gen_case_tac (t, None);
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(** Isar tactic emulations **)
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local
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val rule_spec = Scan.lift (Args.$$$ "rule" -- Args.$$$ ":");
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val opt_rule = Scan.option (rule_spec |-- Attrib.local_thm);
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val varss = Args.and_list (Scan.repeat (Scan.unless rule_spec (Scan.lift Args.name_dummy)));
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in
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val tactic_emulations =
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 [("induct_tac", Method.goal_args' (varss -- opt_rule) gen_induct_tac,
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    "induct_tac emulation (dynamic instantiation!)"),
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  ("case_tac", Method.goal_args' (Scan.lift Args.name -- opt_rule) gen_case_tac,
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    "case_tac emulation (dynamic instantiation!)")];
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end;
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(** induct method setup **)
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(* case names *)
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local
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fun dt_recs (DtTFree _) = []
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  | dt_recs (DtType (_, dts)) = flat (map dt_recs dts)
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  | dt_recs (DtRec i) = [i];
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fun dt_cases (descr: descr) (_, args, constrs) =
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  let
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    fun the_bname i = Sign.base_name (#1 (the (assoc (descr, i))));
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    val bnames = map the_bname (distinct (flat (map dt_recs args)));
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  in map (fn (c, _) => space_implode "_" (Sign.base_name c :: bnames)) constrs end;
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fun induct_cases descr =
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  DatatypeProp.indexify_names (flat (map (dt_cases descr) (map #2 descr)));
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fun exhaust_cases descr i = dt_cases descr (the (assoc (descr, i)));
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in
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fun mk_case_names_induct descr = RuleCases.case_names (induct_cases descr);
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fun mk_case_names_exhausts descr new =
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  map (RuleCases.case_names o exhaust_cases descr o #1)
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    (filter (fn ((_, (name, _, _))) => name mem_string new) descr);
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end;
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fun add_rules simps case_thms size_thms rec_thms inject distinct
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                  weak_case_congs cong_att =
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  (#1 o PureThy.add_thmss [(("simps", simps), []),
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    (("", flat case_thms @ size_thms @ 
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          flat distinct  @ rec_thms), [Simplifier.simp_add_global]),
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    (("", size_thms @ rec_thms), [RecfunCodegen.add]),
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    (("", flat inject),               [iff_add_global]),
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    (("", flat distinct RL [notE]),   [Classical.safe_elim_global]),
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    (("", weak_case_congs),           [cong_att])]);
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(* add_cases_induct *)
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fun add_cases_induct infos induction =
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  let
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    val n = length (HOLogic.dest_concls (Thm.concl_of induction));
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    fun proj i thm =
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      if n = 1 then thm
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      else (if i + 1 < n then (fn th => th RS conjunct1) else I)
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        (Library.funpow i (fn th => th RS conjunct2) thm)
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        |> Drule.zero_var_indexes
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        |> RuleCases.save thm;
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    fun named_rules (name, {index, exhaustion, ...}: datatype_info) =
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      [(("", proj index induction), [InductAttrib.induct_type_global name]),
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       (("", exhaustion), [InductAttrib.cases_type_global name])];
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    fun unnamed_rule i =
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      (("", proj i induction), [InductAttrib.induct_type_global ""]);
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    val rules = flat (map named_rules infos) @ map unnamed_rule (length infos upto n - 1);
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  in #1 o PureThy.add_thms rules end;
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9855f1801d2b HOLogic.dest_conj;
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(**** simplification procedure for showing distinctness of constructors ****)
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fun stripT (i, Type ("fun", [_, T])) = stripT (i + 1, T)
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  | stripT p = p;
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fun stripC (i, f $ x) = stripC (i + 1, f)
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  | stripC p = p;
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val distinctN = "constr_distinct";
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exception ConstrDistinct of term;
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fun distinct_proc sg _ (t as Const ("op =", _) $ t1 $ t2) =
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  (case (stripC (0, t1), stripC (0, t2)) of
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     ((i, Const (cname1, T1)), (j, Const (cname2, T2))) =>
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         (case (stripT (0, T1), stripT (0, T2)) of
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            ((i', Type (tname1, _)), (j', Type (tname2, _))) =>
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                if tname1 = tname2 andalso not (cname1 = cname2) andalso i = i' andalso j = j' then
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                   (case (constrs_of_sg sg tname1) of
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                      Some constrs => let val cnames = map (fst o dest_Const) constrs
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                        in if cname1 mem cnames andalso cname2 mem cnames then
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                             let val eq_t = Logic.mk_equals (t, Const ("False", HOLogic.boolT));
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                                 val eq_ct = cterm_of sg eq_t;
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                                 val Datatype_thy = theory "Datatype";
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                                 val [In0_inject, In1_inject, In0_not_In1, In1_not_In0] =
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                                   map (get_thm Datatype_thy)
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                                     ["In0_inject", "In1_inject", "In0_not_In1", "In1_not_In0"]
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                             in (case (#distinct (datatype_info_sg_err sg tname1)) of
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                                 QuickAndDirty => Some (Thm.invoke_oracle
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                                   Datatype_thy distinctN (sg, ConstrDistinct eq_t))
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                               | FewConstrs thms => Some (prove_goalw_cterm [] eq_ct (K
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                                   [rtac eq_reflection 1, rtac iffI 1, rtac notE 1,
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                                    atac 2, resolve_tac thms 1, etac FalseE 1]))
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                               | ManyConstrs (thm, ss) => Some (prove_goalw_cterm [] eq_ct (K
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                                   [rtac eq_reflection 1, rtac iffI 1, dtac thm 1,
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                                    full_simp_tac ss 1,
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                                    REPEAT (dresolve_tac [In0_inject, In1_inject] 1),
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                                    eresolve_tac [In0_not_In1 RS notE, In1_not_In0 RS notE] 1,
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                                    etac FalseE 1])))
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                             end
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                           else None
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                        end
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   364
                    | None => None)
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   365
                else None
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          | _ => None)
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   | _ => None)
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  | distinct_proc sg _ _ = None;
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   369
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56610e2ba220 sane interface for simprocs;
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val distinct_simproc =
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  Simplifier.simproc (Theory.sign_of HOL.thy) distinctN ["s = t"] distinct_proc;
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val dist_ss = HOL_ss addsimprocs [distinct_simproc];
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   374
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val simproc_setup =
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   376
  [Theory.add_oracle (distinctN, fn (_, ConstrDistinct t) => t),
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   fn thy => (simpset_ref_of thy := simpset_of thy addsimprocs [distinct_simproc]; thy)];
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   379
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   380
(* prepare types *)
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   381
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   382
fun read_typ sign ((Ts, sorts), str) =
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   383
  let
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   384
    val T = Type.no_tvars (Sign.read_typ (sign, (curry assoc)
0d3a168e4d44 New datatype definition package
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   385
      (map (apfst (rpair ~1)) sorts)) str) handle TYPE (msg, _, _) => error msg
0d3a168e4d44 New datatype definition package
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   386
  in (Ts @ [T], add_typ_tfrees (T, sorts)) end;
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   387
0d3a168e4d44 New datatype definition package
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   388
fun cert_typ sign ((Ts, sorts), raw_T) =
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   389
  let
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diff changeset
   390
    val T = Type.no_tvars (Sign.certify_typ sign raw_T) handle
0d3a168e4d44 New datatype definition package
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parents:
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   391
      TYPE (msg, _, _) => error msg;
0d3a168e4d44 New datatype definition package
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parents:
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   392
    val sorts' = add_typ_tfrees (T, sorts)
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   393
  in (Ts @ [T],
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   394
      case duplicates (map fst sorts') of
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   395
         [] => sorts'
0d3a168e4d44 New datatype definition package
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   396
       | dups => error ("Inconsistent sort constraints for " ^ commas dups))
0d3a168e4d44 New datatype definition package
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   397
  end;
0d3a168e4d44 New datatype definition package
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parents:
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   398
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   399
0d3a168e4d44 New datatype definition package
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   400
(**** make datatype info ****)
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   401
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   402
fun make_dt_info descr induct reccomb_names rec_thms
10121
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   403
    (((((((((i, (_, (tname, _, _))), case_name), case_thms),
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   404
      exhaustion_thm), distinct_thm), inject), nchotomy), case_cong), weak_case_cong) =
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   405
  (tname,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   406
   {index = i,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   407
    descr = descr,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   408
    rec_names = reccomb_names,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   409
    rec_rewrites = rec_thms,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   410
    case_name = case_name,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   411
    case_rewrites = case_thms,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   412
    induction = induct,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   413
    exhaustion = exhaustion_thm,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   414
    distinct = distinct_thm,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   415
    inject = inject,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   416
    nchotomy = nchotomy,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   417
    case_cong = case_cong,
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   418
    weak_case_cong = weak_case_cong});
5177
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   419
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   420
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   421
(********************* axiomatic introduction of datatypes ********************)
0d3a168e4d44 New datatype definition package
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parents:
diff changeset
   422
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   423
fun add_and_get_axioms_atts label tnames attss ts thy =
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   424
  foldr (fn (((tname, atts), t), (thy', axs)) =>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   425
    let
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   426
      val (thy'', [ax]) = thy' |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   427
        Theory.add_path tname |>
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   428
        PureThy.add_axioms_i [((label, t), atts)];
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   429
    in (Theory.parent_path thy'', ax::axs)
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   430
    end) (tnames ~~ attss ~~ ts, (thy, []));
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   431
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   432
fun add_and_get_axioms label tnames =
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   433
  add_and_get_axioms_atts label tnames (replicate (length tnames) []);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   434
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   435
fun add_and_get_axiomss label tnames tss thy =
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   436
  foldr (fn ((tname, ts), (thy', axss)) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   437
    let
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   438
      val (thy'', [axs]) = thy' |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   439
        Theory.add_path tname |>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   440
        PureThy.add_axiomss_i [((label, ts), [])];
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   441
    in (Theory.parent_path thy'', axs::axss)
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   442
    end) (tnames ~~ tss, (thy, []));
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   443
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   444
fun add_datatype_axm flat_names new_type_names descr sorts types_syntax constr_syntax dt_info
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   445
    case_names_induct case_names_exhausts thy =
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   446
  let
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   447
    val descr' = flat descr;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   448
    val recTs = get_rec_types descr' sorts;
5578
7de426cf179c Package now chooses type variable names more carefully to
berghofe
parents: 5279
diff changeset
   449
    val used = foldr add_typ_tfree_names (recTs, []);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   450
    val newTs = take (length (hd descr), recTs);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   451
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   452
    val no_size = exists (fn (_, (_, _, constrs)) => exists (fn (_, cargs) => exists
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   453
      (fn (DtType ("fun", [_, DtRec _])) => true | _ => false) cargs) constrs) descr';
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   454
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   455
    (**** declare new types and constants ****)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   456
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   457
    val tyvars = map (fn (_, (_, Ts, _)) => map dest_DtTFree Ts) (hd descr);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   458
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   459
    val constr_decls = map (fn (((_, (_, _, constrs)), T), constr_syntax') =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   460
      map (fn ((_, cargs), (cname, mx)) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   461
        (cname, map (typ_of_dtyp descr' sorts) cargs ---> T, mx))
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   462
          (constrs ~~ constr_syntax')) ((hd descr) ~~ newTs ~~ constr_syntax);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   463
5578
7de426cf179c Package now chooses type variable names more carefully to
berghofe
parents: 5279
diff changeset
   464
    val rec_result_Ts = map TFree (variantlist (replicate (length descr') "'t", used) ~~
12338
de0f4a63baa5 renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents: 12311
diff changeset
   465
      replicate (length descr') HOLogic.typeS);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   466
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   467
    val reccomb_fn_Ts = flat (map (fn (i, (_, _, constrs)) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   468
      map (fn (_, cargs) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   469
        let
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   470
          val Ts = map (typ_of_dtyp descr' sorts) cargs;
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   471
          val recs = filter (is_rec_type o fst) (cargs ~~ Ts);
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   472
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   473
          fun mk_argT (DtRec k, _) = nth_elem (k, rec_result_Ts)
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   474
            | mk_argT (DtType ("fun", [_, DtRec k]), Type ("fun", [T, _])) =
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   475
               T --> nth_elem (k, rec_result_Ts);
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   476
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   477
          val argTs = Ts @ map mk_argT recs
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   478
        in argTs ---> nth_elem (i, rec_result_Ts)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   479
        end) constrs) descr');
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   480
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   481
    val big_reccomb_name = (space_implode "_" new_type_names) ^ "_rec";
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   482
    val reccomb_names = if length descr' = 1 then [big_reccomb_name] else
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   483
      (map ((curry (op ^) (big_reccomb_name ^ "_")) o string_of_int)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   484
        (1 upto (length descr')));
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   485
9739
8470c4662685 Improved names for size function.
berghofe
parents: 9714
diff changeset
   486
    val size_names = DatatypeProp.indexify_names
8470c4662685 Improved names for size function.
berghofe
parents: 9714
diff changeset
   487
      (map (fn T => name_of_typ T ^ "_size") (drop (length (hd descr), recTs)));
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   488
12338
de0f4a63baa5 renamed class "term" to "type" (actually "HOL.type");
wenzelm
parents: 12311
diff changeset
   489
    val freeT = TFree (variant used "'t", HOLogic.typeS);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   490
    val case_fn_Ts = map (fn (i, (_, _, constrs)) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   491
      map (fn (_, cargs) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   492
        let val Ts = map (typ_of_dtyp descr' sorts) cargs
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   493
        in Ts ---> freeT end) constrs) (hd descr);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   494
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   495
    val case_names = map (fn s => (s ^ "_case")) new_type_names;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   496
6305
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   497
    val thy2' = thy |>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   498
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   499
      (** new types **)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   500
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   501
      curry (foldr (fn (((name, mx), tvs), thy') => thy' |>
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   502
          TypedefPackage.add_typedecls [(name, tvs, mx)]))
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   503
        (types_syntax ~~ tyvars) |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   504
      add_path flat_names (space_implode "_" new_type_names) |>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   505
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   506
      (** primrec combinators **)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   507
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   508
      Theory.add_consts_i (map (fn ((name, T), T') =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   509
        (name, reccomb_fn_Ts @ [T] ---> T', NoSyn))
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   510
          (reccomb_names ~~ recTs ~~ rec_result_Ts)) |>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   511
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   512
      (** case combinators **)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   513
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   514
      Theory.add_consts_i (map (fn ((name, T), Ts) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   515
        (name, Ts @ [T] ---> freeT, NoSyn))
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   516
          (case_names ~~ newTs ~~ case_fn_Ts)) |>
6305
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   517
      Theory.add_trrules_i (DatatypeProp.make_case_trrules new_type_names descr);
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   518
6394
3d9fd50fcc43 Theory.sign_of;
wenzelm
parents: 6385
diff changeset
   519
    val reccomb_names' = map (Sign.intern_const (Theory.sign_of thy2')) reccomb_names;
3d9fd50fcc43 Theory.sign_of;
wenzelm
parents: 6385
diff changeset
   520
    val case_names' = map (Sign.intern_const (Theory.sign_of thy2')) case_names;
6305
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   521
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   522
    val thy2 = thy2' |>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   523
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   524
      (** size functions **)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   525
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   526
      (if no_size then I else Theory.add_consts_i (map (fn (s, T) =>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   527
        (Sign.base_name s, T --> HOLogic.natT, NoSyn))
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   528
          (size_names ~~ drop (length (hd descr), recTs)))) |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   529
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   530
      (** constructors **)
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   531
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   532
      parent_path flat_names |>
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   533
      curry (foldr (fn (((((_, (_, _, constrs)), T), tname),
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   534
        constr_syntax'), thy') => thy' |>
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   535
          add_path flat_names tname |>
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   536
            Theory.add_consts_i (map (fn ((_, cargs), (cname, mx)) =>
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   537
              (cname, map (typ_of_dtyp descr' sorts) cargs ---> T, mx))
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   538
                (constrs ~~ constr_syntax')) |>
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   539
          parent_path flat_names))
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   540
            (hd descr ~~ newTs ~~ new_type_names ~~ constr_syntax);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   541
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   542
    (**** introduction of axioms ****)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   543
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   544
    val rec_axs = DatatypeProp.make_primrecs new_type_names descr sorts thy2;
9739
8470c4662685 Improved names for size function.
berghofe
parents: 9714
diff changeset
   545
    val size_axs = if no_size then [] else DatatypeProp.make_size descr sorts thy2;
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   546
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   547
    val (thy3, (([induct], [rec_thms]), inject)) =
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   548
      thy2 |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   549
      Theory.add_path (space_implode "_" new_type_names) |>
10911
eb5721204b38 proper induction rule for arbitrarily branching datatype;
wenzelm
parents: 10525
diff changeset
   550
      PureThy.add_axioms_i [(("induct", DatatypeProp.make_ind descr sorts),
13340
9b0332344ae2 Simplified proof of induction rule for datatypes involving function types.
berghofe
parents: 12922
diff changeset
   551
        [case_names_induct])] |>>>
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   552
      PureThy.add_axiomss_i [(("recs", rec_axs), [])] |>>
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   553
      (if no_size then I else #1 o PureThy.add_axiomss_i [(("size", size_axs), [])]) |>>
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   554
      Theory.parent_path |>>>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   555
      add_and_get_axiomss "inject" new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   556
        (DatatypeProp.make_injs descr sorts);
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   557
    val size_thms = if no_size then [] else get_thms thy3 "size";
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   558
    val (thy4, distinct) = add_and_get_axiomss "distinct" new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   559
      (DatatypeProp.make_distincts new_type_names descr sorts thy3) thy3;
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   560
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   561
    val exhaust_ts = DatatypeProp.make_casedists descr sorts;
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   562
    val (thy5, exhaustion) = add_and_get_axioms_atts "exhaust" new_type_names
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   563
      (map Library.single case_names_exhausts) exhaust_ts thy4;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   564
    val (thy6, case_thms) = add_and_get_axiomss "cases" new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   565
      (DatatypeProp.make_cases new_type_names descr sorts thy5) thy5;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   566
    val (split_ts, split_asm_ts) = ListPair.unzip
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   567
      (DatatypeProp.make_splits new_type_names descr sorts thy6);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   568
    val (thy7, split) = add_and_get_axioms "split" new_type_names split_ts thy6;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   569
    val (thy8, split_asm) = add_and_get_axioms "split_asm" new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   570
      split_asm_ts thy7;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   571
    val (thy9, nchotomys) = add_and_get_axioms "nchotomy" new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   572
      (DatatypeProp.make_nchotomys descr sorts) thy8;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   573
    val (thy10, case_congs) = add_and_get_axioms "case_cong" new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   574
      (DatatypeProp.make_case_congs new_type_names descr sorts thy9) thy9;
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   575
    val (thy11, weak_case_congs) = add_and_get_axioms "weak_case_cong" new_type_names
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   576
      (DatatypeProp.make_weak_case_congs new_type_names descr sorts thy10) thy10;
8405
0255394a05da add_cases_induct: produce proper case names;
wenzelm
parents: 8325
diff changeset
   577
6305
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   578
    val dt_infos = map (make_dt_info descr' induct reccomb_names' rec_thms)
4cbdb974220c Fixed bug in add_datatype_axm:
berghofe
parents: 6103
diff changeset
   579
      ((0 upto length (hd descr) - 1) ~~ (hd descr) ~~ case_names' ~~ case_thms ~~
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   580
        exhaustion ~~ replicate (length (hd descr)) QuickAndDirty ~~ inject ~~
10121
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   581
          nchotomys ~~ case_congs ~~ weak_case_congs);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   582
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   583
    val simps = flat (distinct @ inject @ case_thms) @ size_thms @ rec_thms;
9386
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   584
    val split_thms = split ~~ split_asm;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   585
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   586
    val thy12 = thy11 |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   587
      Theory.add_path (space_implode "_" new_type_names) |>
11345
cd605c85e421 improved iff_add_global, new function add_rules factoring out common behaviour
oheimb
parents: 10930
diff changeset
   588
      add_rules simps case_thms size_thms rec_thms inject distinct
cd605c85e421 improved iff_add_global, new function add_rules factoring out common behaviour
oheimb
parents: 10930
diff changeset
   589
                weak_case_congs Simplifier.cong_add_global |> 
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   590
      put_datatypes (foldr Symtab.update (dt_infos, dt_info)) |>
11805
b110a1ea90da declare projected induction rules stemming from nested recursion;
wenzelm
parents: 11725
diff changeset
   591
      add_cases_induct dt_infos induct |>
9386
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   592
      Theory.parent_path |>
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   593
      (#1 o store_thmss "splits" new_type_names (map (fn (x, y) => [x, y]) split_thms));
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   594
  in
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   595
    (thy12,
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   596
     {distinct = distinct,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   597
      inject = inject,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   598
      exhaustion = exhaustion,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   599
      rec_thms = rec_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   600
      case_thms = case_thms,
9386
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   601
      split_thms = split_thms,
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   602
      induction = induct,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   603
      size = size_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   604
      simps = simps})
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   605
  end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   606
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   607
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   608
(******************* definitional introduction of datatypes *******************)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   609
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   610
fun add_datatype_def flat_names new_type_names descr sorts types_syntax constr_syntax dt_info
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   611
    case_names_induct case_names_exhausts thy =
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   612
  let
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   613
    val _ = message ("Proofs for datatype(s) " ^ commas_quote new_type_names);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   614
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   615
    val (thy2, inject, distinct, dist_rewrites, simproc_dists, induct) = thy |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   616
      DatatypeRepProofs.representation_proofs flat_names dt_info new_type_names descr sorts
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   617
        types_syntax constr_syntax case_names_induct;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   618
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   619
    val (thy3, casedist_thms) = DatatypeAbsProofs.prove_casedist_thms new_type_names descr
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   620
      sorts induct case_names_exhausts thy2;
8478
6053a5cd2881 Eliminated store_clasimp.
berghofe
parents: 8442
diff changeset
   621
    val (thy4, (reccomb_names, rec_thms)) = DatatypeAbsProofs.prove_primrec_thms
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   622
      flat_names new_type_names descr sorts dt_info inject dist_rewrites dist_ss induct thy3;
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   623
    val (thy6, (case_thms, case_names)) = DatatypeAbsProofs.prove_case_thms
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   624
      flat_names new_type_names descr sorts reccomb_names rec_thms thy4;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   625
    val (thy7, split_thms) = DatatypeAbsProofs.prove_split_thms new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   626
      descr sorts inject dist_rewrites casedist_thms case_thms thy6;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   627
    val (thy8, nchotomys) = DatatypeAbsProofs.prove_nchotomys new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   628
      descr sorts casedist_thms thy7;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   629
    val (thy9, case_congs) = DatatypeAbsProofs.prove_case_congs new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   630
      descr sorts nchotomys case_thms thy8;
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   631
    val (thy10, weak_case_congs) = DatatypeAbsProofs.prove_weak_case_congs new_type_names
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   632
      descr sorts thy9;
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   633
    val (thy11, size_thms) = DatatypeAbsProofs.prove_size_thms flat_names new_type_names
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   634
      descr sorts reccomb_names rec_thms thy10;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   635
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   636
    val dt_infos = map (make_dt_info (flat descr) induct reccomb_names rec_thms)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   637
      ((0 upto length (hd descr) - 1) ~~ (hd descr) ~~ case_names ~~ case_thms ~~
10121
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   638
        casedist_thms ~~ simproc_dists ~~ inject ~~ nchotomys ~~ case_congs ~~ weak_case_congs);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   639
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   640
    val simps = flat (distinct @ inject @ case_thms) @ size_thms @ rec_thms;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   641
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   642
    val thy12 = thy11 |>
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   643
      Theory.add_path (space_implode "_" new_type_names) |>
11345
cd605c85e421 improved iff_add_global, new function add_rules factoring out common behaviour
oheimb
parents: 10930
diff changeset
   644
      add_rules simps case_thms size_thms rec_thms inject distinct
cd605c85e421 improved iff_add_global, new function add_rules factoring out common behaviour
oheimb
parents: 10930
diff changeset
   645
                weak_case_congs (Simplifier.change_global_ss (op addcongs)) |> 
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   646
      put_datatypes (foldr Symtab.update (dt_infos, dt_info)) |>
11805
b110a1ea90da declare projected induction rules stemming from nested recursion;
wenzelm
parents: 11725
diff changeset
   647
      add_cases_induct dt_infos induct |>
9386
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   648
      Theory.parent_path |>
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   649
      (#1 o store_thmss "splits" new_type_names (map (fn (x, y) => [x, y]) split_thms));
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   650
  in
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   651
    (thy12,
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   652
     {distinct = distinct,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   653
      inject = inject,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   654
      exhaustion = casedist_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   655
      rec_thms = rec_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   656
      case_thms = case_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   657
      split_thms = split_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   658
      induction = induct,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   659
      size = size_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   660
      simps = simps})
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   661
  end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   662
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   663
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   664
(*********************** declare existing type as datatype *********************)
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   665
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   666
fun gen_rep_datatype apply_theorems alt_names raw_distinct raw_inject raw_induction thy0 =
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   667
  let
12922
ed70a600f0ea clarified internal theory dependencies;
wenzelm
parents: 12876
diff changeset
   668
    val _ = Theory.requires thy0 "Inductive" "datatype representations";
ed70a600f0ea clarified internal theory dependencies;
wenzelm
parents: 12876
diff changeset
   669
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   670
    fun app_thmss srcs thy = foldl_map (fn (thy, x) => apply_theorems x thy) (thy, srcs);
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   671
    fun app_thm src thy = apsnd Library.hd (apply_theorems [src] thy);
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   672
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   673
    val (((thy1, induction), inject), distinct) = thy0
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   674
      |> app_thmss raw_distinct
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   675
      |> apfst (app_thmss raw_inject)
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   676
      |> apfst (apfst (app_thm raw_induction));
6394
3d9fd50fcc43 Theory.sign_of;
wenzelm
parents: 6385
diff changeset
   677
    val sign = Theory.sign_of thy1;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   678
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   679
    val induction' = freezeT induction;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   680
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   681
    fun err t = error ("Ill-formed predicate in induction rule: " ^
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   682
      Sign.string_of_term sign t);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   683
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   684
    fun get_typ (t as _ $ Var (_, Type (tname, Ts))) =
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   685
          ((tname, map dest_TFree Ts) handle TERM _ => err t)
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   686
      | get_typ t = err t;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   687
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   688
    val dtnames = map get_typ (HOLogic.dest_conj (HOLogic.dest_Trueprop (Thm.concl_of induction')));
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   689
    val new_type_names = if_none alt_names (map fst dtnames);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   690
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   691
    fun get_constr t = (case Logic.strip_assums_concl t of
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   692
        _ $ (_ $ t') => (case head_of t' of
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   693
            Const (cname, cT) => (case strip_type cT of
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   694
                (Ts, Type (tname, _)) => (tname, (cname, map (dtyp_of_typ dtnames) Ts))
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   695
              | _ => err t)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   696
          | _ => err t)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   697
      | _ => err t);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   698
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   699
    fun make_dt_spec [] _ _ = []
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   700
      | make_dt_spec ((tname, tvs)::dtnames') i constrs =
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   701
          let val (constrs', constrs'') = take_prefix (equal tname o fst) constrs
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   702
          in (i, (tname, map DtTFree tvs, map snd constrs'))::
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   703
            (make_dt_spec dtnames' (i + 1) constrs'')
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   704
          end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   705
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   706
    val descr = make_dt_spec dtnames 0 (map get_constr (prems_of induction'));
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   707
    val sorts = add_term_tfrees (concl_of induction', []);
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   708
    val dt_info = get_datatypes thy1;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   709
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   710
    val case_names_induct = mk_case_names_induct descr;
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   711
    val case_names_exhausts = mk_case_names_exhausts descr (map #1 dtnames);
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   712
    
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   713
6427
fd36b2e7d80e tuned messages;
wenzelm
parents: 6423
diff changeset
   714
    val _ = message ("Proofs for datatype(s) " ^ commas_quote new_type_names);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   715
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   716
    val (thy2, casedist_thms) = thy1 |>
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   717
      DatatypeAbsProofs.prove_casedist_thms new_type_names [descr] sorts induction
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   718
        case_names_exhausts;
8478
6053a5cd2881 Eliminated store_clasimp.
berghofe
parents: 8442
diff changeset
   719
    val (thy3, (reccomb_names, rec_thms)) = DatatypeAbsProofs.prove_primrec_thms
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   720
      false new_type_names [descr] sorts dt_info inject distinct dist_ss induction thy2;
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   721
    val (thy4, (case_thms, case_names)) = DatatypeAbsProofs.prove_case_thms false
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   722
      new_type_names [descr] sorts reccomb_names rec_thms thy3;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   723
    val (thy5, split_thms) = DatatypeAbsProofs.prove_split_thms
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   724
      new_type_names [descr] sorts inject distinct casedist_thms case_thms thy4;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   725
    val (thy6, nchotomys) = DatatypeAbsProofs.prove_nchotomys new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   726
      [descr] sorts casedist_thms thy5;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   727
    val (thy7, case_congs) = DatatypeAbsProofs.prove_case_congs new_type_names
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   728
      [descr] sorts nchotomys case_thms thy6;
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   729
    val (thy8, weak_case_congs) = DatatypeAbsProofs.prove_weak_case_congs new_type_names
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   730
      [descr] sorts thy7;
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   731
    val (thy9, size_thms) =
10930
7c7a7b0e1d0c Sign.exists_stamp;
wenzelm
parents: 10911
diff changeset
   732
      if Sign.exists_stamp "NatArith" (Theory.sign_of thy8) then
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   733
        DatatypeAbsProofs.prove_size_thms false new_type_names
8601
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   734
          [descr] sorts reccomb_names rec_thms thy8
8fb3a81b4ccf added weak_case_cong feature
nipkow
parents: 8541
diff changeset
   735
      else (thy8, []);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   736
9149
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   737
    val (thy10, [induction']) = thy9 |>
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   738
      (#1 o store_thmss "inject" new_type_names inject) |>
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   739
      (#1 o store_thmss "distinct" new_type_names distinct) |>
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   740
      Theory.add_path (space_implode "_" new_type_names) |>
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   741
      PureThy.add_thms [(("induct", induction), [case_names_induct])];
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   742
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   743
    val dt_infos = map (make_dt_info descr induction' reccomb_names rec_thms)
10121
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   744
      ((0 upto length descr - 1) ~~ descr ~~ case_names ~~ case_thms ~~ casedist_thms ~~
fb9be005cc44 export get_datatypes_sg;
wenzelm
parents: 9747
diff changeset
   745
        map FewConstrs distinct ~~ inject ~~ nchotomys ~~ case_congs ~~ weak_case_congs);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   746
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   747
    val simps = flat (distinct @ inject @ case_thms) @ size_thms @ rec_thms;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   748
9149
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   749
    val thy11 = thy10 |>
11345
cd605c85e421 improved iff_add_global, new function add_rules factoring out common behaviour
oheimb
parents: 10930
diff changeset
   750
      add_rules simps case_thms size_thms rec_thms inject distinct
cd605c85e421 improved iff_add_global, new function add_rules factoring out common behaviour
oheimb
parents: 10930
diff changeset
   751
                weak_case_congs (Simplifier.change_global_ss (op addcongs)) |> 
9149
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   752
      put_datatypes (foldr Symtab.update (dt_infos, dt_info)) |>
11805
b110a1ea90da declare projected induction rules stemming from nested recursion;
wenzelm
parents: 11725
diff changeset
   753
      add_cases_induct dt_infos induction' |>
9386
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   754
      Theory.parent_path |>
8800603d99f6 theorems foo.splits = foo.split foo.split_asm;
wenzelm
parents: 9149
diff changeset
   755
      (#1 o store_thmss "splits" new_type_names (map (fn (x, y) => [x, y]) split_thms));
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   756
  in
9149
a126a40cba76 export proper induction rule;
wenzelm
parents: 8697
diff changeset
   757
    (thy11,
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   758
     {distinct = distinct,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   759
      inject = inject,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   760
      exhaustion = casedist_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   761
      rec_thms = rec_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   762
      case_thms = case_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   763
      split_thms = split_thms,
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   764
      induction = induction',
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   765
      size = size_thms,
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   766
      simps = simps})
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   767
  end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   768
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   769
val rep_datatype = gen_rep_datatype IsarThy.apply_theorems;
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   770
val rep_datatype_i = gen_rep_datatype IsarThy.apply_theorems_i;
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   771
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   772
11958
2ece34b9fd8e Isar: fixed rep_datatype args;
wenzelm
parents: 11805
diff changeset
   773
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   774
(******************************** add datatype ********************************)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   775
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   776
fun gen_add_datatype prep_typ flat_names new_type_names dts thy =
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   777
  let
12922
ed70a600f0ea clarified internal theory dependencies;
wenzelm
parents: 12876
diff changeset
   778
    val _ = Theory.requires thy "Datatype_Universe" "datatype definitions";
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   779
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   780
    (* this theory is used just for parsing *)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   781
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   782
    val tmp_thy = thy |>
5892
e5e44cc54eb2 Attribute.tthms_of;
wenzelm
parents: 5720
diff changeset
   783
      Theory.copy |>
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   784
      Theory.add_types (map (fn (tvs, tname, mx, _) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   785
        (tname, length tvs, mx)) dts);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   786
6394
3d9fd50fcc43 Theory.sign_of;
wenzelm
parents: 6385
diff changeset
   787
    val sign = Theory.sign_of tmp_thy;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   788
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   789
    val (tyvars, _, _, _)::_ = dts;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   790
    val (new_dts, types_syntax) = ListPair.unzip (map (fn (tvs, tname, mx, _) =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   791
      let val full_tname = Sign.full_name sign (Syntax.type_name tname mx)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   792
      in (case duplicates tvs of
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   793
            [] => if eq_set (tyvars, tvs) then ((full_tname, tvs), (tname, mx))
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   794
                  else error ("Mutually recursive datatypes must have same type parameters")
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   795
          | dups => error ("Duplicate parameter(s) for datatype " ^ full_tname ^
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   796
              " : " ^ commas dups))
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   797
      end) dts);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   798
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   799
    val _ = (case duplicates (map fst new_dts) @ duplicates new_type_names of
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   800
      [] => () | dups => error ("Duplicate datatypes: " ^ commas dups));
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   801
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   802
    fun prep_dt_spec ((dts', constr_syntax, sorts, i), (tvs, tname, mx, constrs)) =
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   803
      let
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   804
        fun prep_constr ((constrs, constr_syntax', sorts'), (cname, cargs, mx')) =
5279
cba6a96f5812 Improved well-formedness check.
berghofe
parents: 5177
diff changeset
   805
          let
cba6a96f5812 Improved well-formedness check.
berghofe
parents: 5177
diff changeset
   806
            val (cargs', sorts'') = foldl (prep_typ sign) (([], sorts'), cargs);
cba6a96f5812 Improved well-formedness check.
berghofe
parents: 5177
diff changeset
   807
            val _ = (case foldr add_typ_tfree_names (cargs', []) \\ tvs of
cba6a96f5812 Improved well-formedness check.
berghofe
parents: 5177
diff changeset
   808
                [] => ()
cba6a96f5812 Improved well-formedness check.
berghofe
parents: 5177
diff changeset
   809
              | vs => error ("Extra type variables on rhs: " ^ commas vs))
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   810
          in (constrs @ [((if flat_names then Sign.full_name sign else
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   811
                Sign.full_name_path sign tname) (Syntax.const_name cname mx'),
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   812
                   map (dtyp_of_typ new_dts) cargs')],
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   813
              constr_syntax' @ [(cname, mx')], sorts'')
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   814
          end handle ERROR =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   815
            error ("The error above occured in constructor " ^ cname ^
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   816
              " of datatype " ^ tname);
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   817
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   818
        val (constrs', constr_syntax', sorts') =
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   819
          foldl prep_constr (([], [], sorts), constrs)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   820
8405
0255394a05da add_cases_induct: produce proper case names;
wenzelm
parents: 8325
diff changeset
   821
      in
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   822
        case duplicates (map fst constrs') of
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   823
           [] =>
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   824
             (dts' @ [(i, (Sign.full_name sign (Syntax.type_name tname mx),
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   825
                map DtTFree tvs, constrs'))],
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   826
              constr_syntax @ [constr_syntax'], sorts', i + 1)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   827
         | dups => error ("Duplicate constructors " ^ commas dups ^
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   828
             " in datatype " ^ tname)
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   829
      end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   830
5661
6ecb6ea25f19 - Changed structure of name spaces
berghofe
parents: 5578
diff changeset
   831
    val (dts', constr_syntax, sorts', i) = foldl prep_dt_spec (([], [], [], 0), dts);
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   832
    val sorts = sorts' @ (map (rpair (Sign.defaultS sign)) (tyvars \\ map fst sorts'));
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   833
    val dt_info = get_datatypes thy;
7015
85be09eb136c - Datatype package now also supports arbitrarily branching datatypes
berghofe
parents: 6851
diff changeset
   834
    val (descr, _) = unfold_datatypes sign dts' sorts dt_info dts' i;
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   835
    val _ = check_nonempty descr;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   836
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   837
    val descr' = flat descr;
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   838
    val case_names_induct = mk_case_names_induct descr';
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   839
    val case_names_exhausts = mk_case_names_exhausts descr' (map #1 new_dts);
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   840
  in
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   841
    (if (!quick_and_dirty) then add_datatype_axm else add_datatype_def)
8437
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   842
      flat_names new_type_names descr sorts types_syntax constr_syntax dt_info
258281c43dea removed cases_of;
wenzelm
parents: 8405
diff changeset
   843
      case_names_induct case_names_exhausts thy
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   844
  end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   845
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   846
val add_datatype_i = gen_add_datatype cert_typ;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   847
val add_datatype = gen_add_datatype read_typ;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   848
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   849
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   850
(** package setup **)
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   851
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   852
(* setup theory *)
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   853
8541
b0d2002f9f04 proof methods: 'case_tac' / 'induct_tac';
wenzelm
parents: 8478
diff changeset
   854
val setup = [DatatypesData.init, Method.add_methods tactic_emulations] @ simproc_setup;
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   855
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   856
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   857
(* outer syntax *)
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   858
6723
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   859
local structure P = OuterParse and K = OuterSyntax.Keyword in
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   860
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   861
val datatype_decl =
6723
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   862
  Scan.option (P.$$$ "(" |-- P.name --| P.$$$ ")") -- P.type_args -- P.name -- P.opt_infix --
12876
a70df1e5bf10 got rid of explicit marginal comments (now stripped earlier from input);
wenzelm
parents: 12708
diff changeset
   863
    (P.$$$ "=" |-- P.enum1 "|" (P.name -- Scan.repeat P.typ -- P.opt_mixfix));
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   864
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   865
fun mk_datatype args =
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   866
  let
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   867
    val names = map (fn ((((None, _), t), _), _) => t | ((((Some t, _), _), _), _) => t) args;
12876
a70df1e5bf10 got rid of explicit marginal comments (now stripped earlier from input);
wenzelm
parents: 12708
diff changeset
   868
    val specs = map (fn ((((_, vs), t), mx), cons) =>
a70df1e5bf10 got rid of explicit marginal comments (now stripped earlier from input);
wenzelm
parents: 12708
diff changeset
   869
      (vs, t, mx, map (fn ((x, y), z) => (x, y, z)) cons)) args;
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   870
  in #1 o add_datatype false names specs end;
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   871
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   872
val datatypeP =
6723
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   873
  OuterSyntax.command "datatype" "define inductive datatypes" K.thy_decl
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   874
    (P.and_list1 datatype_decl >> (Toplevel.theory o mk_datatype));
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   875
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   876
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   877
val rep_datatype_decl =
6723
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   878
  Scan.option (Scan.repeat1 P.name) --
11958
2ece34b9fd8e Isar: fixed rep_datatype args;
wenzelm
parents: 11805
diff changeset
   879
    Scan.optional (P.$$$ "distinct" |-- P.!!! (P.and_list1 P.xthms1)) [[]] --
2ece34b9fd8e Isar: fixed rep_datatype args;
wenzelm
parents: 11805
diff changeset
   880
    Scan.optional (P.$$$ "inject" |-- P.!!! (P.and_list1 P.xthms1)) [[]] --
6723
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   881
    (P.$$$ "induction" |-- P.!!! P.xthm);
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   882
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   883
fun mk_rep_datatype (((opt_ts, dss), iss), ind) = #1 o rep_datatype opt_ts dss iss ind;
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   884
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   885
val rep_datatypeP =
6723
f342449d73ca outer syntax keyword classification;
wenzelm
parents: 6556
diff changeset
   886
  OuterSyntax.command "rep_datatype" "represent existing types inductively" K.thy_decl
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   887
    (rep_datatype_decl >> (Toplevel.theory o mk_rep_datatype));
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   888
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   889
6479
b0448cab1b1e rep_datatype syntax: 'induction' instead of 'induct';
wenzelm
parents: 6441
diff changeset
   890
val _ = OuterSyntax.add_keywords ["distinct", "inject", "induction"];
6385
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   891
val _ = OuterSyntax.add_parsers [datatypeP, rep_datatypeP];
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   892
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   893
end;
5a6570458d9e rep_datatype: '_i' version, attributes, outer syntax;
wenzelm
parents: 6360
diff changeset
   894
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   895
5177
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   896
end;
0d3a168e4d44 New datatype definition package
berghofe
parents:
diff changeset
   897
6360
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   898
structure BasicDatatypePackage: BASIC_DATATYPE_PACKAGE = DatatypePackage;
83573ae0f22c outer syntax for 'datatype';
wenzelm
parents: 6305
diff changeset
   899
open BasicDatatypePackage;