src/Pure/Isar/class.ML
author haftmann
Wed, 11 Aug 2010 17:59:32 +0200
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(*  Title:      Pure/Isar/class.ML
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    Author:     Florian Haftmann, TU Muenchen
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Type classes derived from primitive axclasses and locales.
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*)
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signature CLASS =
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sig
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  (*classes*)
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  val is_class: theory -> class -> bool
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  val these_params: theory -> sort -> (string * (class * (string * typ))) list
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  val base_sort: theory -> class -> sort
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  val rules: theory -> class -> thm option * thm
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  val these_defs: theory -> sort -> thm list
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  val these_operations: theory -> sort
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    -> (string * (class * (typ * term))) list
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  val print_classes: theory -> unit
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  val init: class -> theory -> Proof.context
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  val begin: class list -> sort -> Proof.context -> Proof.context
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  val declare: class -> (binding * mixfix) * (term list * term) -> theory -> theory
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  val abbrev: class -> Syntax.mode -> (binding * mixfix) * term -> theory -> theory
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  val refresh_syntax: class -> Proof.context -> Proof.context
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  val redeclare_operations: theory -> sort -> Proof.context -> Proof.context
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  val class_prefix: string -> string
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  val register: class -> class list -> ((string * typ) * (string * typ)) list
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    -> sort -> morphism -> morphism -> thm option -> thm option -> thm
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    -> theory -> theory
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  (*instances*)
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  val instantiation: string list * (string * sort) list * sort -> theory -> local_theory
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  val instantiation_instance: (local_theory -> local_theory)
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    -> local_theory -> Proof.state
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  val prove_instantiation_instance: (Proof.context -> tactic)
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    -> local_theory -> local_theory
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  val prove_instantiation_exit: (Proof.context -> tactic)
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    -> local_theory -> theory
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  val prove_instantiation_exit_result: (morphism -> 'a -> 'b)
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    -> (Proof.context -> 'b -> tactic) -> 'a -> local_theory -> 'b * theory
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  val read_multi_arity: theory -> xstring list * xstring list * xstring
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    -> string list * (string * sort) list * sort
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  val type_name: string -> string
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  val instantiation_cmd: xstring list * xstring list * xstring -> theory -> local_theory
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  val instance_arity_cmd: xstring list * xstring list * xstring -> theory -> Proof.state
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  (*subclasses*)
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  val classrel: class * class -> theory -> Proof.state
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  val classrel_cmd: xstring * xstring -> theory -> Proof.state
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  val register_subclass: class * class -> morphism option -> Element.witness option
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    -> morphism -> theory -> theory
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  (*tactics*)
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  val intro_classes_tac: thm list -> tactic
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  val default_intro_tac: Proof.context -> thm list -> tactic
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end;
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structure Class: CLASS =
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struct
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(** class data **)
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datatype class_data = ClassData of {
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  (* static part *)
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  consts: (string * string) list
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    (*locale parameter ~> constant name*),
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  base_sort: sort,
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  base_morph: morphism
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    (*static part of canonical morphism*),
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  export_morph: morphism,
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  assm_intro: thm option,
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  of_class: thm,
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  axiom: thm option,
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  (* dynamic part *)
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  defs: thm list,
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  operations: (string * (class * (typ * term))) list
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};
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fun make_class_data ((consts, base_sort, base_morph, export_morph, assm_intro, of_class, axiom),
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    (defs, operations)) =
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  ClassData { consts = consts, base_sort = base_sort,
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    base_morph = base_morph, export_morph = export_morph, assm_intro = assm_intro,
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    of_class = of_class, axiom = axiom, defs = defs, operations = operations };
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fun map_class_data f (ClassData { consts, base_sort, base_morph, export_morph, assm_intro,
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    of_class, axiom, defs, operations }) =
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  make_class_data (f ((consts, base_sort, base_morph, export_morph, assm_intro, of_class, axiom),
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    (defs, operations)));
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fun merge_class_data _ (ClassData { consts = consts,
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    base_sort = base_sort, base_morph = base_morph, export_morph = export_morph, assm_intro = assm_intro,
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    of_class = of_class, axiom = axiom, defs = defs1, operations = operations1 },
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  ClassData { consts = _, base_sort = _, base_morph = _, export_morph = _, assm_intro = _,
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    of_class = _, axiom = _, defs = defs2, operations = operations2 }) =
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  make_class_data ((consts, base_sort, base_morph, export_morph, assm_intro, of_class, axiom),
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    (Thm.merge_thms (defs1, defs2),
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      AList.merge (op =) (K true) (operations1, operations2)));
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structure ClassData = Theory_Data
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(
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  type T = class_data Graph.T
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  val empty = Graph.empty;
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  val extend = I;
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  val merge = Graph.join merge_class_data;
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);
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(* queries *)
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fun lookup_class_data thy class = case try (Graph.get_node (ClassData.get thy)) class
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 of SOME (ClassData data) => SOME data
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  | NONE => NONE;
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fun the_class_data thy class = case lookup_class_data thy class
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 of NONE => error ("Undeclared class " ^ quote class)
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  | SOME data => data;
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val is_class = is_some oo lookup_class_data;
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val ancestry = Graph.all_succs o ClassData.get;
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val heritage = Graph.all_preds o ClassData.get;
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fun these_params thy =
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  let
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    fun params class =
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      let
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        val const_typs = (#params o AxClass.get_info thy) class;
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        val const_names = (#consts o the_class_data thy) class;
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      in
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        (map o apsnd)
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          (fn c => (class, (c, (the o AList.lookup (op =) const_typs) c))) const_names
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      end;
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  in maps params o ancestry thy end;
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val base_sort = #base_sort oo the_class_data;
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fun rules thy class =
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  let val { axiom, of_class, ... } = the_class_data thy class
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  in (axiom, of_class) end;
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fun all_assm_intros thy =
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  Graph.fold (fn (_, (ClassData { assm_intro, ... }, _)) => fold (insert Thm.eq_thm)
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    (the_list assm_intro)) (ClassData.get thy) [];
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fun these_defs thy = maps (#defs o the_class_data thy) o ancestry thy;
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fun these_operations thy = maps (#operations o the_class_data thy) o ancestry thy;
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val base_morphism = #base_morph oo the_class_data;
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fun morphism thy class = case Element.eq_morphism thy (these_defs thy [class])
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 of SOME eq_morph => base_morphism thy class $> eq_morph
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  | NONE => base_morphism thy class;
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val export_morphism = #export_morph oo the_class_data;
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fun print_classes thy =
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  let
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    val ctxt = ProofContext.init_global thy;
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    val algebra = Sign.classes_of thy;
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    val arities =
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      Symtab.empty
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      |> Symtab.fold (fn (tyco, arities) => fold (fn (class, _) =>
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           Symtab.map_default (class, []) (insert (op =) tyco)) arities)
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             (Sorts.arities_of algebra);
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    val the_arities = these o Symtab.lookup arities;
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    fun mk_arity class tyco =
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      let
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        val Ss = Sorts.mg_domain algebra tyco [class];
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      in Syntax.pretty_arity ctxt (tyco, Ss, [class]) end;
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    fun mk_param (c, ty) = Pretty.str (Sign.extern_const thy c ^ " :: "
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      ^ setmp_CRITICAL show_sorts false (Syntax.string_of_typ ctxt o Type.strip_sorts) ty);
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    fun mk_entry class = (Pretty.block o Pretty.fbreaks o map_filter I) [
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      (SOME o Pretty.str) ("class " ^ Sign.extern_class thy class ^ ":"),
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      (SOME o Pretty.block) [Pretty.str "supersort: ",
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        (Syntax.pretty_sort ctxt o Sign.minimize_sort thy o Sign.super_classes thy) class],
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      ((fn [] => NONE | ps => (SOME o Pretty.block o Pretty.fbreaks)
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          (Pretty.str "parameters:" :: ps)) o map mk_param
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        o these o Option.map #params o try (AxClass.get_info thy)) class,
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      (SOME o Pretty.block o Pretty.breaks) [
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        Pretty.str "instances:",
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        Pretty.list "" "" (map (mk_arity class) (the_arities class))
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      ]
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    ]
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  in
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    (Pretty.writeln o Pretty.chunks o separate (Pretty.str "")
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      o map mk_entry o Sorts.all_classes) algebra
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  end;
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(* updaters *)
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fun register class sups params base_sort base_morph export_morph
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    axiom assm_intro of_class thy =
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  let
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    val operations = map (fn (v_ty as (_, ty), (c, _)) =>
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      (c, (class, (ty, Free v_ty)))) params;
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    val add_class = Graph.new_node (class,
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        make_class_data (((map o pairself) fst params, base_sort,
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          base_morph, export_morph, assm_intro, of_class, axiom), ([], operations)))
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      #> fold (curry Graph.add_edge class) sups;
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  in ClassData.map add_class thy end;
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fun activate_defs class thms thy = case Element.eq_morphism thy thms
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 of SOME eq_morph => fold (fn cls => fn thy =>
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      Context.theory_map (Locale.amend_registration (cls, base_morphism thy cls)
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        (eq_morph, true) (export_morphism thy cls)) thy) (heritage thy [class]) thy
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  | NONE => thy;
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fun register_operation class (c, (t, some_def)) thy =
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  let
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    val base_sort = base_sort thy class;
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    val prep_typ = map_type_tfree
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      (fn (v, sort) => if Name.aT = v
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        then TFree (v, base_sort) else TVar ((v, 0), sort));
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    val t' = map_types prep_typ t;
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    val ty' = Term.fastype_of t';
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  in
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    thy
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    |> (ClassData.map o Graph.map_node class o map_class_data o apsnd)
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      (fn (defs, operations) =>
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        (fold cons (the_list some_def) defs,
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          (c, (class, (ty', t'))) :: operations))
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    |> activate_defs class (the_list some_def)
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  end;
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fun register_subclass (sub, sup) some_dep_morph some_wit export thy =
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  let
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    val intros = (snd o rules thy) sup :: map_filter I
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      [Option.map (Drule.export_without_context_open o Element.conclude_witness) some_wit,
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        (fst o rules thy) sub];
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    val tac = EVERY (map (TRYALL o Tactic.rtac) intros);
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    val classrel = Skip_Proof.prove_global thy [] [] (Logic.mk_classrel (sub, sup))
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      (K tac);
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    val diff_sort = Sign.complete_sort thy [sup]
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      |> subtract (op =) (Sign.complete_sort thy [sub])
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      |> filter (is_class thy);
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    val add_dependency = case some_dep_morph
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     of SOME dep_morph => Locale.add_dependency sub
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          (sup, dep_morph $> Element.satisfy_morphism (the_list some_wit)) export
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      | NONE => I
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  in
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    thy
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    |> AxClass.add_classrel classrel
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    |> ClassData.map (Graph.add_edge (sub, sup))
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    |> activate_defs sub (these_defs thy diff_sort)
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    |> add_dependency
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  end;
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(** classes and class target **)
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(* class context syntax *)
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fun these_unchecks thy = map (fn (c, (_, (ty, t))) => (t, Const (c, ty)))
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  o these_operations thy;
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fun redeclare_const thy c =
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  let val b = Long_Name.base_name c
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  in Sign.intern_const thy b = c ? Variable.declare_const (b, c) end;
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fun synchronize_class_syntax sort base_sort ctxt =
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  let
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    val thy = ProofContext.theory_of ctxt;
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    val algebra = Sign.classes_of thy;
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    val operations = these_operations thy sort;
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    fun subst_class_typ sort = map_type_tfree (K (TVar ((Name.aT, 0), sort)));
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    val primary_constraints =
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      (map o apsnd) (subst_class_typ base_sort o fst o snd) operations;
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    val secondary_constraints =
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      (map o apsnd) (fn (class, (ty, _)) => subst_class_typ [class] ty) operations;
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    fun improve (c, ty) = (case AList.lookup (op =) primary_constraints c
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     of SOME ty' => (case try (Type.raw_match (ty', ty)) Vartab.empty
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         of SOME tyenv => (case Vartab.lookup tyenv (Name.aT, 0)
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             of SOME (_, ty' as TVar (vi, sort)) =>
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                  if Type_Infer.is_param vi
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                    andalso Sorts.sort_le algebra (base_sort, sort)
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                      then SOME (ty', TFree (Name.aT, base_sort))
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                      else NONE
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              | _ => NONE)
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          | NONE => NONE)
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      | NONE => NONE)
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    fun subst (c, ty) = Option.map snd (AList.lookup (op =) operations c);
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    val unchecks = these_unchecks thy sort;
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  in
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    ctxt
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    |> fold (redeclare_const thy o fst) primary_constraints
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    |> Overloading.map_improvable_syntax (K (((primary_constraints, secondary_constraints),
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        (((improve, subst), true), unchecks)), false))
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    |> Overloading.set_primary_constraints
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  end;
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fun refresh_syntax class ctxt =
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  let
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    val thy = ProofContext.theory_of ctxt;
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    val base_sort = base_sort thy class;
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  in synchronize_class_syntax [class] base_sort ctxt end;
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fun redeclare_operations thy sort =
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  fold (redeclare_const thy o fst) (these_operations thy sort);
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fun begin sort base_sort ctxt =
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  ctxt
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  |> Variable.declare_term
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      (Logic.mk_type (TFree (Name.aT, base_sort)))
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  |> synchronize_class_syntax sort base_sort
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  |> Overloading.add_improvable_syntax;
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fun init class thy =
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  thy
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  |> Locale.init class
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  |> begin [class] (base_sort thy class);
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(* class target *)
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val class_prefix = Logic.const_of_class o Long_Name.base_name;
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fun declare class ((c, mx), (type_params, dict)) thy =
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  let
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    val morph = morphism thy class;
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    val b = Morphism.binding morph c;
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    val b_def = Morphism.binding morph (Binding.suffix_name "_dict" b);
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    val c' = Sign.full_name thy b;
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    val dict' = Morphism.term morph dict;
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    val ty' = map Term.fastype_of type_params ---> Term.fastype_of dict';
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    val def_eq = Logic.mk_equals (list_comb (Const (c', ty'), type_params), dict')
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      |> map_types Type.strip_sorts;
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  in
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    thy
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    |> Sign.declare_const ((b, Type.strip_sorts ty'), mx)
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    |> snd
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    |> Thm.add_def false false (b_def, def_eq)
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    |>> apsnd Thm.varifyT_global
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    |-> (fn (_, def_thm) => PureThy.store_thm (b_def, def_thm)
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      #> snd
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      #> null type_params ? register_operation class (c', (dict', SOME (Thm.symmetric def_thm))))
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    |> Sign.add_const_constraint (c', SOME ty')
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  end;
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fun abbrev class prmode ((c, mx), rhs) thy =
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  let
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    val morph = morphism thy class;
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    val unchecks = these_unchecks thy [class];
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    val b = Morphism.binding morph c;
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    val c' = Sign.full_name thy b;
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    val rhs' = Pattern.rewrite_term thy unchecks [] rhs;
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    val ty' = Term.fastype_of rhs';
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    val rhs'' = map_types Logic.varifyT_global rhs';
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  in
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    thy
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    |> Sign.add_abbrev (#1 prmode) (b, rhs'')
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    |> snd
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    |> Sign.add_const_constraint (c', SOME ty')
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    |> Sign.notation true prmode [(Const (c', ty'), mx)]
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    |> not (#1 prmode = Print_Mode.input) ? register_operation class (c', (rhs', NONE))
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  end;
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   355
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(* simple subclasses *)
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   357
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   358
local
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   359
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fun gen_classrel mk_prop classrel thy =
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  let
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    fun after_qed results =
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      ProofContext.theory ((fold o fold) AxClass.add_classrel results);
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  in
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   365
    thy
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    |> ProofContext.init_global
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    |> Proof.theorem NONE after_qed [[(mk_prop thy classrel, [])]]
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  end;
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   369
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in
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   371
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val classrel =
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  gen_classrel (Logic.mk_classrel oo AxClass.cert_classrel);
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val classrel_cmd =
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  gen_classrel (Logic.mk_classrel oo AxClass.read_classrel);
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   376
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   377
end; (*local*)
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   379
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   380
(** instantiation target **)
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   381
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   382
(* bookkeeping *)
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   383
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   384
datatype instantiation = Instantiation of {
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  arities: string list * (string * sort) list * sort,
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  params: ((string * string) * (string * typ)) list
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    (*(instantiation parameter, type constructor), (local instantiation parameter, typ)*)
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   388
}
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   389
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structure Instantiation = Proof_Data
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   391
(
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  type T = instantiation
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   393
  fun init _ = Instantiation { arities = ([], [], []), params = [] };
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   394
);
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   395
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   396
fun mk_instantiation (arities, params) =
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   397
  Instantiation { arities = arities, params = params };
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4b0f2599ed48 modernized structure Local_Theory;
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   398
fun get_instantiation lthy = case Instantiation.get (Local_Theory.target_of lthy)
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   399
 of Instantiation data => data;
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   400
fun map_instantiation f = (Local_Theory.target o Instantiation.map)
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   401
  (fn Instantiation { arities, params } => mk_instantiation (f (arities, params)));
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   402
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diff changeset
   403
fun the_instantiation lthy = case get_instantiation lthy
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   404
 of { arities = ([], [], []), ... } => error "No instantiation target"
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   405
  | data => data;
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   406
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   407
val instantiation_params = #params o get_instantiation;
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   408
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   409
fun instantiation_param lthy b = instantiation_params lthy
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   410
  |> find_first (fn (_, (v, _)) => Binding.name_of b = v)
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   411
  |> Option.map (fst o fst);
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   412
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   413
fun read_multi_arity thy (raw_tycos, raw_sorts, raw_sort) =
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   414
  let
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bafd82950e24 renamed ProofContext.init to ProofContext.init_global to emphasize that this is not the real thing;
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   415
    val ctxt = ProofContext.init_global thy;
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a91c7ed801b8 added ProofContext.tsig_of -- proforma version for local name space only, not logical content;
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   416
    val all_arities = map (fn raw_tyco => ProofContext.read_arity ctxt
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   417
      (raw_tyco, raw_sorts, raw_sort)) raw_tycos;
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   418
    val tycos = map #1 all_arities;
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   419
    val (_, sorts, sort) = hd all_arities;
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   420
    val vs = Name.names Name.context Name.aT sorts;
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   421
  in (tycos, vs, sort) end;
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   422
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   423
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   424
(* syntax *)
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   425
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   426
fun synchronize_inst_syntax ctxt =
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   427
  let
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   428
    val Instantiation { params, ... } = Instantiation.get ctxt;
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   429
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   430
    val lookup_inst_param = AxClass.lookup_inst_param
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   431
      (Sign.consts_of (ProofContext.theory_of ctxt)) params;
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   432
    fun subst (c, ty) = case lookup_inst_param (c, ty)
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   433
     of SOME (v_ty as (_, ty)) => SOME (ty, Free v_ty)
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   434
      | NONE => NONE;
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   435
    val unchecks =
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   436
      map (fn ((c, _), v_ty as (_, ty)) => (Free v_ty, Const (c, ty))) params;
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   437
  in
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   438
    ctxt
26259
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   439
    |> Overloading.map_improvable_syntax
26730
bbb5e6904d78 proper abbreviations in class
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   440
         (fn (((primary_constraints, _), (((improve, _), _), _)), _) =>
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   441
            (((primary_constraints, []), (((improve, subst), false), unchecks)), false))
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   442
  end;
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   443
38382
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   444
fun resort_terms pp algebra consts constraints ts =
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   445
  let
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   446
    fun matchings (Const (c_ty as (c, _))) = (case constraints c
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   447
         of NONE => I
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   448
          | SOME sorts => fold2 (curry (Sorts.meet_sort algebra))
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   449
              (Consts.typargs consts c_ty) sorts)
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   450
      | matchings _ = I
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   451
    val tvartab = (fold o fold_aterms) matchings ts Vartab.empty
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   452
      handle Sorts.CLASS_ERROR e => error (Sorts.class_error pp e);
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diff changeset
   453
    val inst = map_type_tvar
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diff changeset
   454
      (fn (vi, sort) => TVar (vi, the_default sort (Vartab.lookup tvartab vi)));
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   455
  in if Vartab.is_empty tvartab then NONE else SOME ((map o map_types) inst ts) end;
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   456
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   457
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   458
(* target *)
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   459
37678
0040bafffdef "prod" and "sum" replace "*" and "+" respectively
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   460
val sanitize_name = (*necessary as long as "dirty" type identifiers are permitted*)
25485
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   461
  let
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016f677ad7b8 declaration of instance parameter names
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   462
    fun is_valid s = Symbol.is_ascii_letter s orelse Symbol.is_ascii_digit s
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   463
      orelse s = "'" orelse s = "_";
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   464
    val is_junk = not o is_valid andf Symbol.is_regular;
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   465
    val junk = Scan.many is_junk;
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   466
    val scan_valids = Symbol.scanner "Malformed input"
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diff changeset
   467
      ((junk |--
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diff changeset
   468
        (Scan.optional (Scan.one Symbol.is_ascii_letter) "x" ^^ (Scan.many is_valid >> implode)
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diff changeset
   469
        --| junk))
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f8bcd311d501 added ::: / @@@ scanner combinators;
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diff changeset
   470
      ::: Scan.repeat ((Scan.many1 is_valid >> implode) --| junk));
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   471
  in
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diff changeset
   472
    explode #> scan_valids #> implode
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diff changeset
   473
  end;
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diff changeset
   474
37678
0040bafffdef "prod" and "sum" replace "*" and "+" respectively
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   475
val type_name = sanitize_name o Long_Name.base_name;
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   476
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   477
fun define_overloaded (c, U) v (b_def, rhs) = Local_Theory.theory_result
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diff changeset
   478
    (AxClass.declare_overloaded (c, U) ##>> AxClass.define_overloaded b_def (c, rhs))
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   479
  ##> (map_instantiation o apsnd) (filter_out (fn (_, (v', _)) => v' = v))
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   480
  ##> Local_Theory.target synchronize_inst_syntax;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   481
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   482
fun foundation (((b, U), mx), (b_def, rhs)) (type_params, term_params) lthy =
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   483
  case instantiation_param lthy b
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   484
   of SOME c => if mx <> NoSyn then error ("Illegal mixfix syntax for overloaded constant " ^ quote c)
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   485
        else lthy |> define_overloaded (c, U) (Binding.name_of b) (b_def, rhs)
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   486
    | NONE => lthy |>
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   487
        Generic_Target.theory_foundation (((b, U), mx), (b_def, rhs)) (type_params, term_params);
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   488
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   489
fun pretty lthy =
26518
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   490
  let
38382
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   491
    val { arities = (tycos, vs, sort), params } = the_instantiation lthy;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   492
    val thy = ProofContext.theory_of lthy;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   493
    fun pr_arity tyco = Syntax.pretty_arity lthy (tyco, map snd vs, sort);
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   494
    fun pr_param ((c, _), (v, ty)) =
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   495
      (Pretty.block o Pretty.breaks) [Pretty.str v, Pretty.str "==",
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   496
        (Pretty.str o Sign.extern_const thy) c, Pretty.str "::", Syntax.pretty_typ_global thy ty];
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   497
  in Pretty.str "instantiation" :: map pr_arity tycos @ map pr_param params end;
26518
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   498
38382
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   499
fun conclude lthy =
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   500
  let
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   501
    val (tycos, vs, sort) = (#arities o the_instantiation) lthy;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   502
    val thy = ProofContext.theory_of lthy;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   503
    val _ = map (fn tyco => if Sign.of_sort thy
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   504
        (Type (tyco, map TFree vs), sort)
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   505
      then () else error ("Missing instance proof for type " ^ quote (Sign.extern_type thy tyco)))
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   506
        tycos;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   507
  in lthy end;
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   508
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   509
fun instantiation (tycos, vs, sort) thy =
25462
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   510
  let
25536
01753a944433 improved
haftmann
parents: 25518
diff changeset
   511
    val _ = if null tycos then error "At least one arity must be given" else ();
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   512
    val class_params = these_params thy (filter (can (AxClass.get_info thy)) sort);
29632
c3d576157244 fixed reading of class specs: declare class operations in context
haftmann
parents: 29610
diff changeset
   513
    fun get_param tyco (param, (_, (c, ty))) =
c3d576157244 fixed reading of class specs: declare class operations in context
haftmann
parents: 29610
diff changeset
   514
      if can (AxClass.param_of_inst thy) (c, tyco)
25603
4b7a58fc168c dropped Class.prep_spec
haftmann
parents: 25597
diff changeset
   515
      then NONE else SOME ((c, tyco),
25864
11f531354852 explicit type variables for instantiation
haftmann
parents: 25829
diff changeset
   516
        (param ^ "_" ^ type_name tyco, map_atyps (K (Type (tyco, map TFree vs))) ty));
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   517
    val params = map_product get_param tycos class_params |> map_filter I;
26518
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   518
    val primary_constraints = map (apsnd
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   519
      (map_atyps (K (TVar ((Name.aT, 0), [])))) o snd o snd) class_params;
26939
1035c89b4c02 moved global pretty/string_of functions from Sign to Syntax;
wenzelm
parents: 26761
diff changeset
   520
    val pp = Syntax.pp_global thy;
26518
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   521
    val algebra = Sign.classes_of thy
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   522
      |> fold (fn tyco => Sorts.add_arities pp
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   523
            (tyco, map (fn class => (class, map snd vs)) sort)) tycos;
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   524
    val consts = Sign.consts_of thy;
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   525
    val improve_constraints = AList.lookup (op =)
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   526
      (map (fn (_, (class, (c, _))) => (c, [[class]])) class_params);
33967
e191b400a8e0 more accurate linerarity
haftmann
parents: 33671
diff changeset
   527
    fun resort_check ts ctxt = case resort_terms (Syntax.pp ctxt) algebra consts improve_constraints ts
26518
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   528
     of NONE => NONE
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   529
      | SOME ts' => SOME (ts', ctxt);
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   530
    val lookup_inst_param = AxClass.lookup_inst_param consts params;
31210
d6681ddc046c avoid potential problem with stale theory
haftmann
parents: 31012
diff changeset
   531
    val typ_instance = Type.typ_instance (Sign.tsig_of thy);
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   532
    fun improve (c, ty) = case lookup_inst_param (c, ty)
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   533
     of SOME (_, ty') => if typ_instance (ty', ty) then SOME (ty, ty') else NONE
26259
d30f4a509361 better improvement in instantiation target
haftmann
parents: 26247
diff changeset
   534
      | NONE => NONE;
25485
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   535
  in
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   536
    thy
32379
a97e9caebd60 additional checkpoints avoid problems in error situations
haftmann
parents: 32074
diff changeset
   537
    |> Theory.checkpoint
36610
bafd82950e24 renamed ProofContext.init to ProofContext.init_global to emphasize that this is not the real thing;
wenzelm
parents: 36462
diff changeset
   538
    |> ProofContext.init_global
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   539
    |> Instantiation.put (mk_instantiation ((tycos, vs, sort), params))
27281
b457537e789a Variable.declare_typ;
wenzelm
parents: 27089
diff changeset
   540
    |> fold (Variable.declare_typ o TFree) vs
31249
d51d2a22a4f9 tuned class user space type system code
haftmann
parents: 31214
diff changeset
   541
    |> fold (Variable.declare_names o Free o snd) params
26259
d30f4a509361 better improvement in instantiation target
haftmann
parents: 26247
diff changeset
   542
    |> (Overloading.map_improvable_syntax o apfst)
29969
9dbb046136d0 more precise improvement in instantiation user space type system
haftmann
parents: 29632
diff changeset
   543
         (K ((primary_constraints, []), (((improve, K NONE), false), [])))
26259
d30f4a509361 better improvement in instantiation target
haftmann
parents: 26247
diff changeset
   544
    |> Overloading.add_improvable_syntax
26518
3db6a46d8460 improved improvements for instantiaton
haftmann
parents: 26470
diff changeset
   545
    |> Context.proof_map (Syntax.add_term_check 0 "resorting" resort_check)
26238
c30bb8182da2 generic improvable syntax for targets
haftmann
parents: 26167
diff changeset
   546
    |> synchronize_inst_syntax
38382
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   547
    |> Local_Theory.init NONE ""
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   548
       {define = Generic_Target.define foundation,
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   549
        notes = Generic_Target.notes
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   550
          (fn kind => fn global_facts => fn _ => Generic_Target.theory_notes kind global_facts),
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   551
        abbrev = Generic_Target.abbrev
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   552
          (fn prmode => fn (b, mx) => fn (t, _) => fn _ => Generic_Target.theory_abbrev prmode ((b, mx), t)),
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   553
        declaration = K Generic_Target.theory_declaration,
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   554
        syntax_declaration = K Generic_Target.theory_declaration,
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   555
        pretty = pretty,
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   556
        exit = Local_Theory.target_of o conclude}
25485
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   557
  end;
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   558
38382
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   559
fun instantiation_cmd arities thy =
8b02c5bf1d0e tuned internal structure
haftmann
parents: 38381
diff changeset
   560
  instantiation (read_multi_arity thy arities) thy;
26238
c30bb8182da2 generic improvable syntax for targets
haftmann
parents: 26167
diff changeset
   561
25485
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   562
fun gen_instantiation_instance do_proof after_qed lthy =
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   563
  let
25864
11f531354852 explicit type variables for instantiation
haftmann
parents: 25829
diff changeset
   564
    val (tycos, vs, sort) = (#arities o the_instantiation) lthy;
11f531354852 explicit type variables for instantiation
haftmann
parents: 25829
diff changeset
   565
    val arities_proof = maps (fn tyco => Logic.mk_arities (tyco, map snd vs, sort)) tycos;
25462
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   566
    fun after_qed' results =
37246
b3ff14122645 do not expose store flag of AxClass.add_*
haftmann
parents: 37236
diff changeset
   567
      Local_Theory.theory (fold (AxClass.add_arity o Thm.varifyT_global) results)
25462
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   568
      #> after_qed;
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   569
  in
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   570
    lthy
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   571
    |> do_proof after_qed' arities_proof
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   572
  end;
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   573
25485
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   574
val instantiation_instance = gen_instantiation_instance (fn after_qed => fn ts =>
36323
655e2d74de3a modernized naming conventions of main Isar proof elements;
wenzelm
parents: 36106
diff changeset
   575
  Proof.theorem NONE (after_qed o map the_single) (map (fn t => [(t, [])]) ts));
25462
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   576
25485
33840a854e63 tuned interfaces of class module
haftmann
parents: 25462
diff changeset
   577
fun prove_instantiation_instance tac = gen_instantiation_instance (fn after_qed =>
25502
9200b36280c0 instance command as rudimentary class target
haftmann
parents: 25485
diff changeset
   578
  fn ts => fn lthy => after_qed (map (fn t => Goal.prove lthy [] [] t
9200b36280c0 instance command as rudimentary class target
haftmann
parents: 25485
diff changeset
   579
    (fn {context, ...} => tac context)) ts) lthy) I;
25462
dad0291cb76a rudimentary instantiation target
haftmann
parents: 25368
diff changeset
   580
28666
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   581
fun prove_instantiation_exit tac = prove_instantiation_instance tac
33671
4b0f2599ed48 modernized structure Local_Theory;
wenzelm
parents: 33522
diff changeset
   582
  #> Local_Theory.exit_global;
28666
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   583
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   584
fun prove_instantiation_exit_result f tac x lthy =
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   585
  let
29439
83601bdadae8 construct explicit class morphism
haftmann
parents: 29362
diff changeset
   586
    val morph = ProofContext.export_morphism lthy
36610
bafd82950e24 renamed ProofContext.init to ProofContext.init_global to emphasize that this is not the real thing;
wenzelm
parents: 36462
diff changeset
   587
      (ProofContext.init_global (ProofContext.theory_of lthy));
29439
83601bdadae8 construct explicit class morphism
haftmann
parents: 29362
diff changeset
   588
    val y = f morph x;
28666
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   589
  in
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   590
    lthy
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   591
    |> prove_instantiation_exit (fn ctxt => tac ctxt y)
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   592
    |> pair y
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   593
  end;
d2dbfe3a0284 prove_instantiation_exit combinators
haftmann
parents: 28259
diff changeset
   594
29526
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   595
31635
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   596
(* simplified instantiation interface with no class parameter *)
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   597
31869
01fed718958c mutual instances
haftmann
parents: 31697
diff changeset
   598
fun instance_arity_cmd raw_arities thy =
31635
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   599
  let
31869
01fed718958c mutual instances
haftmann
parents: 31697
diff changeset
   600
    val (tycos, vs, sort) = read_multi_arity thy raw_arities;
01fed718958c mutual instances
haftmann
parents: 31697
diff changeset
   601
    val sorts = map snd vs;
01fed718958c mutual instances
haftmann
parents: 31697
diff changeset
   602
    val arities = maps (fn tyco => Logic.mk_arities (tyco, sorts, sort)) tycos;
31635
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   603
    fun after_qed results = ProofContext.theory
37246
b3ff14122645 do not expose store flag of AxClass.add_*
haftmann
parents: 37236
diff changeset
   604
      ((fold o fold) AxClass.add_arity results);
31635
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   605
  in
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   606
    thy
36610
bafd82950e24 renamed ProofContext.init to ProofContext.init_global to emphasize that this is not the real thing;
wenzelm
parents: 36462
diff changeset
   607
    |> ProofContext.init_global
36323
655e2d74de3a modernized naming conventions of main Isar proof elements;
wenzelm
parents: 36106
diff changeset
   608
    |> Proof.theorem NONE after_qed (map (fn t => [(t, [])]) arities)
31635
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   609
  end;
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   610
8623244a50d5 axclass command now legacy
haftmann
parents: 31599
diff changeset
   611
29526
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   612
(** tactics and methods **)
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   613
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   614
fun intro_classes_tac facts st =
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   615
  let
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   616
    val thy = Thm.theory_of_thm st;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   617
    val classes = Sign.all_classes thy;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   618
    val class_trivs = map (Thm.class_triv thy) classes;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   619
    val class_intros = map_filter (try (#intro o AxClass.get_info thy)) classes;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   620
    val assm_intros = all_assm_intros thy;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   621
  in
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   622
    Method.intros_tac (class_trivs @ class_intros @ assm_intros) facts st
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   623
  end;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   624
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   625
fun default_intro_tac ctxt [] =
29577
08f783c5fcf0 code cleanup
haftmann
parents: 29558
diff changeset
   626
      intro_classes_tac [] ORELSE Locale.intro_locales_tac true ctxt []
29526
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   627
  | default_intro_tac _ _ = no_tac;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   628
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   629
fun default_tac rules ctxt facts =
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   630
  HEADGOAL (Method.some_rule_tac rules ctxt facts) ORELSE
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   631
    default_intro_tac ctxt facts;
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   632
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   633
val _ = Context.>> (Context.map_theory
30515
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   634
 (Method.setup (Binding.name "intro_classes") (Scan.succeed (K (METHOD intro_classes_tac)))
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   635
    "back-chain introduction rules of classes" #>
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   636
  Method.setup (Binding.name "default") (Attrib.thms >> (METHOD oo default_tac))
bca05b17b618 simplified method setup;
wenzelm
parents: 30510
diff changeset
   637
    "apply some intro/elim rule"));
29526
0b32c8b84d3e code cleanup
haftmann
parents: 29509
diff changeset
   638
24218
fbf1646b267c ClassPackage renamed to Class
haftmann
parents:
diff changeset
   639
end;
25683
d9fefc4859be maior tuning
haftmann
parents: 25668
diff changeset
   640