src/Pure/Isar/locale.ML
author wenzelm
Mon Mar 15 18:59:16 2010 +0100 (2010-03-15)
changeset 35798 fd1bb29f8170
parent 33643 b275f26a638b
child 36096 abc6a2ea4b88
permissions -rw-r--r--
replaced type_syntax/term_syntax by uniform syntax_declaration;
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(*  Title:      Pure/Isar/locale.ML
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    Author:     Clemens Ballarin, TU Muenchen
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Locales -- managed Isar proof contexts, based on Pure predicates.
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Draws basic ideas from Florian Kammueller's original version of
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locales, but uses the richer infrastructure of Isar instead of the raw
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meta-logic.  Furthermore, structured import of contexts (with merge
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and rename operations) are provided, as well as type-inference of the
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signature parts, and predicate definitions of the specification text.
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Interpretation enables the reuse of theorems of locales in other
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contexts, namely those defined by theories, structured proofs and
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locales themselves.
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See also:
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[1] Clemens Ballarin. Locales and Locale Expressions in Isabelle/Isar.
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    In Stefano Berardi et al., Types for Proofs and Programs: International
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    Workshop, TYPES 2003, Torino, Italy, LNCS 3085, pages 34-50, 2004.
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[2] Clemens Ballarin. Interpretation of Locales in Isabelle: Managing
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    Dependencies between Locales. Technical Report TUM-I0607, Technische
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    Universitaet Muenchen, 2006.
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[3] Clemens Ballarin. Interpretation of Locales in Isabelle: Theories and
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    Proof Contexts. In J.M. Borwein and W.M. Farmer, MKM 2006, LNAI 4108,
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    pages 31-43, 2006.
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*)
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signature LOCALE =
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sig
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  (* Locale specification *)
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  val register_locale: binding ->
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    (string * sort) list * ((string * typ) * mixfix) list ->
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    term option * term list ->
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    thm option * thm option -> thm list ->
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    declaration list ->
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    (string * (Attrib.binding * (thm list * Attrib.src list) list) list) list ->
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    (string * morphism) list -> theory -> theory
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  val intern: theory -> xstring -> string
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  val extern: theory -> string -> xstring
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  val defined: theory -> string -> bool
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  val params_of: theory -> string -> ((string * typ) * mixfix) list
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  val intros_of: theory -> string -> thm option * thm option
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  val axioms_of: theory -> string -> thm list
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  val instance_of: theory -> string -> morphism -> term list
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  val specification_of: theory -> string -> term option * term list
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  (* Storing results *)
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  val add_thmss: string -> string -> (Attrib.binding * (thm list * Attrib.src list) list) list ->
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    Proof.context -> Proof.context
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  val add_declaration: string -> declaration -> Proof.context -> Proof.context
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  val add_syntax_declaration: string -> declaration -> Proof.context -> Proof.context
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  (* Activation *)
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  val activate_declarations: string * morphism -> Proof.context -> Proof.context
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  val activate_facts: string * morphism -> Context.generic -> Context.generic
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  val init: string -> theory -> Proof.context
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  (* Reasoning about locales *)
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  val get_witnesses: Proof.context -> thm list
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  val get_intros: Proof.context -> thm list
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  val get_unfolds: Proof.context -> thm list
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  val witness_add: attribute
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  val intro_add: attribute
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  val unfold_add: attribute
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  val intro_locales_tac: bool -> Proof.context -> thm list -> tactic
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  (* Registrations and dependencies *)
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  val add_registration: string * morphism -> (morphism * bool) option ->
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    morphism -> theory -> theory
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  val amend_registration: string * morphism -> morphism * bool ->
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    morphism -> theory -> theory
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  val add_dependency: string -> string * morphism -> morphism -> theory -> theory
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  (* Diagnostic *)
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  val print_locales: theory -> unit
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  val print_locale: theory -> bool -> xstring -> unit
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  val print_registrations: theory -> string -> unit
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end;
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structure Locale: LOCALE =
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struct
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datatype ctxt = datatype Element.ctxt;
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(*** Theory data ***)
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datatype locale = Loc of {
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  (** static part **)
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  parameters: (string * sort) list * ((string * typ) * mixfix) list,
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    (* type and term parameters *)
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  spec: term option * term list,
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    (* assumptions (as a single predicate expression) and defines *)
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  intros: thm option * thm option,
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  axioms: thm list,
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  (** dynamic part **)
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  syntax_decls: (declaration * stamp) list,
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    (* syntax declarations *)
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  notes: ((string * (Attrib.binding * (thm list * Attrib.src list) list) list) * stamp) list,
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    (* theorem declarations *)
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  dependencies: ((string * morphism) * stamp) list
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    (* locale dependencies (sublocale relation) *)
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};
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fun mk_locale ((parameters, spec, intros, axioms), ((syntax_decls, notes), dependencies)) =
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  Loc {parameters = parameters, intros = intros, axioms = axioms, spec = spec,
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    syntax_decls = syntax_decls, notes = notes, dependencies = dependencies};
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fun map_locale f (Loc {parameters, spec, intros, axioms, syntax_decls, notes, dependencies}) =
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  mk_locale (f ((parameters, spec, intros, axioms), ((syntax_decls, notes), dependencies)));
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fun merge_locale
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 (Loc {parameters, spec, intros, axioms, syntax_decls, notes, dependencies},
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  Loc {syntax_decls = syntax_decls', notes = notes', dependencies = dependencies', ...}) =
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    mk_locale
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      ((parameters, spec, intros, axioms),
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        ((merge (eq_snd op =) (syntax_decls, syntax_decls'),
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          merge (eq_snd op =) (notes, notes')),
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            merge (eq_snd op =) (dependencies, dependencies')));
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structure Locales = Theory_Data
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(
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  type T = locale Name_Space.table;
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  val empty : T = Name_Space.empty_table "locale";
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  val extend = I;
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  val merge = Name_Space.join_tables (K merge_locale);
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);
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val intern = Name_Space.intern o #1 o Locales.get;
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val extern = Name_Space.extern o #1 o Locales.get;
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val get_locale = Symtab.lookup o #2 o Locales.get;
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val defined = Symtab.defined o #2 o Locales.get;
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fun the_locale thy name =
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  (case get_locale thy name of
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    SOME (Loc loc) => loc
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  | NONE => error ("Unknown locale " ^ quote name));
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fun register_locale binding parameters spec intros axioms syntax_decls notes dependencies thy =
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  thy |> Locales.map (Name_Space.define true (Sign.naming_of thy)
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    (binding,
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      mk_locale ((parameters, spec, intros, axioms),
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        ((map (fn decl => (decl, stamp ())) syntax_decls, map (fn n => (n, stamp ())) notes),
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          map (fn d => (d, stamp ())) dependencies))) #> snd);
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fun change_locale name =
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  Locales.map o apsnd o Symtab.map_entry name o map_locale o apsnd;
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fun print_locales thy =
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  Pretty.strs ("locales:" :: map #1 (Name_Space.extern_table (Locales.get thy)))
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  |> Pretty.writeln;
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(*** Primitive operations ***)
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fun params_of thy = snd o #parameters o the_locale thy;
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fun intros_of thy = #intros o the_locale thy;
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fun axioms_of thy = #axioms o the_locale thy;
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fun instance_of thy name morph = params_of thy name |>
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  map (Morphism.term morph o Free o #1);
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fun specification_of thy = #spec o the_locale thy;
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fun dependencies_of thy name = the_locale thy name |>
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  #dependencies |> map fst;
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(*** Activate context elements of locale ***)
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(** Identifiers: activated locales in theory or proof context **)
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fun ident_eq thy ((n: string, ts), (m, ss)) = (m = n) andalso Pattern.matchess thy (ss, ts);
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(* FIXME: this is ident_le, smaller term is more general *)
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local
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datatype 'a delayed = Ready of 'a | ToDo of 'a delayed * 'a delayed;
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structure Identifiers = Generic_Data
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(
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  type T = (string * term list) list delayed;
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  val empty = Ready [];
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  val extend = I;
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  val merge = ToDo;
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);
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fun finish thy (ToDo (i1, i2)) = merge (ident_eq thy) (finish thy i1, finish thy i2)
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  | finish _ (Ready ids) = ids;
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val _ = Context.>> (Context.map_theory (Theory.at_begin (fn thy =>
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  (case Identifiers.get (Context.Theory thy) of
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    Ready _ => NONE
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  | ids => SOME (Context.theory_map (Identifiers.put (Ready (finish thy ids))) thy)))));
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in
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val get_idents = (fn Ready ids => ids) o Identifiers.get;
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val put_idents = Identifiers.put o Ready;
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end;
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(** Resolve locale dependencies in a depth-first fashion **)
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local
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val roundup_bound = 120;
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fun add thy depth export (name, morph) (deps, marked) =
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  if depth > roundup_bound
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  then error "Roundup bound exceeded (sublocale relation probably not terminating)."
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  else
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    let
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      val dependencies = dependencies_of thy name;
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      val instance = instance_of thy name (morph $> export);
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    in
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      if member (ident_eq thy) marked (name, instance)
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      then (deps, marked)
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      else
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        let
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          val dependencies' = map (fn (name, morph') => (name, morph' $> morph)) dependencies;
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          val marked' = (name, instance) :: marked;
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          val (deps', marked'') = fold_rev (add thy (depth + 1) export) dependencies' ([], marked');
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        in
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          ((name, morph) :: deps' @ deps, marked'')
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        end
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    end;
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in
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(* Note that while identifiers always have the external (exported) view, activate_dep
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  is presented with the internal view. *)
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fun roundup thy activate_dep export (name, morph) (marked, input) =
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  let
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    (* Find all dependencies incuding new ones (which are dependencies enriching
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      existing registrations). *)
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    val (dependencies, marked') = add thy 0 export (name, morph) ([], []);
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    (* Filter out fragments from marked; these won't be activated. *)
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    val dependencies' = filter_out (fn (name, morph) =>
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      member (ident_eq thy) marked (name, instance_of thy name (morph $> export))) dependencies;
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  in
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    (merge (ident_eq thy) (marked, marked'), input |> fold_rev activate_dep dependencies')
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  end;
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end;
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(* Declarations, facts and entire locale content *)
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fun activate_syntax_decls (name, morph) context =
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  let
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    val thy = Context.theory_of context;
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    val {syntax_decls, ...} = the_locale thy name;
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  in
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    context
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    |> fold_rev (fn (decl, _) => decl morph) syntax_decls
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  end;
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fun activate_notes activ_elem transfer thy (name, morph) input =
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  let
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    val {notes, ...} = the_locale thy name;
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    fun activate ((kind, facts), _) input =
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      let
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        val facts' = facts |> Element.facts_map (Element.morph_ctxt (transfer input $> morph))
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      in activ_elem (Notes (kind, facts')) input end;
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  in
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    fold_rev activate notes input
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  end;
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fun activate_all name thy activ_elem transfer (marked, input) =
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  let
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    val {parameters = (_, params), spec = (asm, defs), ...} = the_locale thy name;
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    val input' = input |>
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      (not (null params) ?
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        activ_elem (Fixes (map (fn ((x, T), mx) => (Binding.name x, SOME T, mx)) params))) |>
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      (* FIXME type parameters *)
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      (case asm of SOME A => activ_elem (Assumes [(Attrib.empty_binding, [(A, [])])]) | _ => I) |>
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      (if not (null defs)
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        then activ_elem (Defines (map (fn def => (Attrib.empty_binding, (def, []))) defs))
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        else I);
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    val activate = activate_notes activ_elem transfer thy;
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  in
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    roundup thy activate Morphism.identity (name, Morphism.identity) (marked, input')
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  end;
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(** Public activation functions **)
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fun activate_declarations dep = Context.proof_map (fn context =>
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  let
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    val thy = Context.theory_of context;
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  in
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    roundup thy activate_syntax_decls Morphism.identity dep (get_idents context, context)
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    |-> put_idents
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  end);
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fun activate_facts dep context =
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  let
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    val thy = Context.theory_of context;
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    val activate = activate_notes Element.init (Element.transfer_morphism o Context.theory_of) thy;
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  in roundup thy activate Morphism.identity dep (get_idents context, context) |-> put_idents end;
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fun init name thy =
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  activate_all name thy Element.init (Element.transfer_morphism o Context.theory_of)
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    ([], Context.Proof (ProofContext.init thy)) |-> put_idents |> Context.proof_of;
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fun print_locale thy show_facts raw_name =
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  let
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    val name = intern thy raw_name;
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    val ctxt = init name thy;
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    fun cons_elem (elem as Notes _) = show_facts ? cons elem
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      | cons_elem elem = cons elem;
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    val elems =
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      activate_all name thy cons_elem (K (Element.transfer_morphism thy)) ([], [])
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      |> snd |> rev;
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  in
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    Pretty.big_list "locale elements:" (map (Pretty.chunks o Element.pretty_ctxt ctxt) elems)
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    |> Pretty.writeln
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  end;
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(*** Registrations: interpretations in theories ***)
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structure Registrations = Theory_Data
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(
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  type T = ((string * (morphism * morphism)) * stamp) list *
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    (* registrations, in reverse order of declaration *)
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    (stamp * ((morphism * bool) * stamp) list) list;
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    (* alist of mixin lists, per list mixins in reverse order of declaration *)
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  val empty = ([], []);
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  val extend = I;
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  fun merge ((r1, m1), (r2, m2)) : T =
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    (Library.merge (eq_snd op =) (r1, r2),
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      AList.join (op =) (K (Library.merge (eq_snd op =))) (m1, m2));
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    (* FIXME consolidate with dependencies, consider one data slot only *)
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);
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(* Primitive operations *)
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fun compose_mixins mixins =
ballarin@32801
   348
  fold_rev Morphism.compose (map (fst o fst) mixins) Morphism.identity;
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   349
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   350
fun reg_morph mixins ((name, (base, export)), stamp) =
ballarin@32801
   351
  let val mix = the_default [] (AList.lookup (op =) mixins stamp) |> compose_mixins;
ballarin@32801
   352
  in (name, base $> mix $> export) end;
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   353
haftmann@31988
   354
fun these_registrations thy name = Registrations.get thy
ballarin@32801
   355
  |>> filter (curry (op =) name o fst o fst)
ballarin@32801
   356
  |-> (fn regs => fn mixins => map (reg_morph mixins) regs);
haftmann@31988
   357
haftmann@31988
   358
fun all_registrations thy = Registrations.get thy
ballarin@32801
   359
  |-> (fn regs => fn mixins => map (reg_morph mixins) regs);
ballarin@32801
   360
ballarin@32804
   361
fun get_mixins thy (name, morph) =
ballarin@32804
   362
  let
ballarin@32804
   363
    val (regs, mixins) = Registrations.get thy;
ballarin@32804
   364
  in
ballarin@32804
   365
    case find_first (fn ((name', (morph', export')), _) => ident_eq thy
ballarin@32804
   366
      ((name', instance_of thy name' (morph' $> export')), (name, instance_of thy name morph))) (rev regs) of
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   367
      NONE => []
ballarin@32804
   368
    | SOME (_, stamp) => the_default [] (AList.lookup (op =) mixins stamp)
ballarin@32804
   369
  end;
ballarin@32804
   370
ballarin@32804
   371
fun collect_mixins thy (name, morph) =
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   372
  roundup thy (fn dep => fn mixins =>
ballarin@32804
   373
    merge (eq_snd op =) (mixins, get_mixins thy dep)) Morphism.identity (name, morph) ([], [])
ballarin@32804
   374
  |> snd |> filter (snd o fst);  (* only inheritable mixins *)
ballarin@32804
   375
ballarin@32804
   376
fun activate_notes' activ_elem transfer thy export (name, morph) input =
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   377
  let
ballarin@32804
   378
    val {notes, ...} = the_locale thy name;
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   379
    fun activate ((kind, facts), _) input =
ballarin@32804
   380
      let
ballarin@32804
   381
        val mixin = collect_mixins thy (name, morph $> export) |> compose_mixins;
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   382
        val facts' = facts |> Element.facts_map (Element.morph_ctxt (transfer input $> morph $> mixin $> export))
ballarin@32804
   383
      in activ_elem (Notes (kind, facts')) input end;
ballarin@32804
   384
  in
ballarin@32804
   385
    fold_rev activate notes input
ballarin@32804
   386
  end;
ballarin@32804
   387
ballarin@32804
   388
fun activate_facts' export dep context =
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   389
  let
ballarin@32804
   390
    val thy = Context.theory_of context;
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   391
    val activate = activate_notes' Element.init (Element.transfer_morphism o Context.theory_of) thy export;
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   392
  in roundup thy activate export dep (get_idents context, context) |-> put_idents end;
ballarin@32804
   393
ballarin@32804
   394
ballarin@32804
   395
(* Diagnostic *)
ballarin@32804
   396
ballarin@32804
   397
fun print_registrations thy raw_name =
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   398
  let
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   399
    val name = intern thy raw_name;
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   400
    val name' = extern thy name;
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   401
    val ctxt = ProofContext.init thy;
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   402
    fun prt_qual (qual, mand) = Pretty.str (qual ^ (if mand then "!" else "?"));
ballarin@32804
   403
    fun prt_quals qs = Pretty.separate "." (map prt_qual qs) |> Pretty.block;
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   404
    val prt_term = Pretty.quote o Syntax.pretty_term ctxt;
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   405
    fun prt_term' t = if !show_types
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   406
      then Pretty.block [prt_term t, Pretty.brk 1, Pretty.str "::",
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   407
        Pretty.brk 1, (Pretty.quote o Syntax.pretty_typ ctxt) (type_of t)]
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   408
      else prt_term t;
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   409
    fun prt_inst ts =
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   410
      Pretty.block (Pretty.breaks (Pretty.str name' :: map prt_term' ts));
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   411
    fun prt_reg (name, morph) =
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   412
      let
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   413
        val qs = Binding.name "x" |> Morphism.binding morph |> Binding.prefix_of;
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   414
        val ts = instance_of thy name morph;
ballarin@32804
   415
      in
ballarin@32804
   416
        case qs of
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   417
           [] => prt_inst ts
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   418
         | qs => Pretty.block [prt_quals qs, Pretty.brk 1, Pretty.str ":",
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   419
             Pretty.brk 1, prt_inst ts]
ballarin@32804
   420
      end;
ballarin@32804
   421
  in
ballarin@32804
   422
    (case these_registrations thy name of
ballarin@32804
   423
        [] => Pretty.str ("no interpretations")
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   424
      | regs => Pretty.big_list "interpretations:" (map prt_reg (rev regs)))
ballarin@32804
   425
    |> Pretty.writeln
ballarin@32804
   426
  end;
ballarin@32801
   427
ballarin@32801
   428
ballarin@32801
   429
(* Add and extend registrations *)
ballarin@32801
   430
ballarin@32804
   431
fun amend_registration (name, morph) mixin export thy =
ballarin@32804
   432
  let
ballarin@32804
   433
    val regs = Registrations.get thy |> fst;
ballarin@32804
   434
    val base = instance_of thy name (morph $> export);
ballarin@32804
   435
    fun match ((name', (morph', export')), _) =
ballarin@32804
   436
      name = name' andalso eq_list (op aconv) (base, instance_of thy name' (morph' $> export'));
ballarin@32804
   437
  in
ballarin@32804
   438
    case find_first match (rev regs) of
ballarin@32804
   439
        NONE => error ("No interpretation of locale " ^
ballarin@32804
   440
          quote (extern thy name) ^ " and\nparameter instantiation " ^
ballarin@32804
   441
          space_implode " " (map (quote o Syntax.string_of_term_global thy) base) ^
ballarin@32804
   442
          " available")
ballarin@32804
   443
      | SOME (_, stamp') => Registrations.map 
ballarin@32804
   444
          (apsnd (AList.map_default (op =) (stamp', []) (cons (mixin, stamp ())))) thy
ballarin@32804
   445
    (* FIXME deal with inheritance: propagate to existing children *)
ballarin@32804
   446
  end;
ballarin@32804
   447
ballarin@32801
   448
(* Note that a registration that would be subsumed by an existing one will not be
ballarin@32801
   449
   generated, and it will not be possible to amend it. *)
ballarin@32801
   450
ballarin@32804
   451
fun add_registration (name, base_morph) mixin export thy =
ballarin@32801
   452
  let
ballarin@32801
   453
    val base = instance_of thy name base_morph;
ballarin@32801
   454
  in
ballarin@32801
   455
    if member (ident_eq thy) (get_idents (Context.Theory thy)) (name, base)
ballarin@32801
   456
    then thy
ballarin@32801
   457
    else
ballarin@32801
   458
      let
ballarin@32804
   459
        fun add_reg (dep', morph') =
ballarin@32804
   460
          let
ballarin@32804
   461
            val mixins = collect_mixins thy (dep', morph' $> export);
ballarin@32804
   462
            val stamp = stamp ();
ballarin@32804
   463
          in
ballarin@32804
   464
            Registrations.map (apfst (cons ((dep', (morph', export)), stamp))
ballarin@32804
   465
              #> apsnd (cons (stamp, mixins)))
ballarin@32804
   466
          end
ballarin@32801
   467
      in
ballarin@32804
   468
        (get_idents (Context.Theory thy), thy)
ballarin@32804
   469
        (* add new registrations with inherited mixins *)
ballarin@32804
   470
        |> roundup thy add_reg export (name, base_morph)
ballarin@32804
   471
        |> snd
ballarin@32804
   472
        (* add mixin *)
ballarin@32845
   473
        |> (case mixin of NONE => I
ballarin@32845
   474
             | SOME mixin => amend_registration (name, base_morph) mixin export)
ballarin@32801
   475
        (* activate import hierarchy as far as not already active *)
ballarin@32804
   476
        |> Context.theory_map (activate_facts' export (name, base_morph))
ballarin@32801
   477
      end
ballarin@32801
   478
  end;
ballarin@32801
   479
haftmann@29361
   480
haftmann@31988
   481
(*** Dependencies ***)
haftmann@31988
   482
haftmann@32074
   483
fun add_dependency loc (dep, morph) export thy =
haftmann@31988
   484
  thy
haftmann@32074
   485
  |> (change_locale loc o apsnd) (cons ((dep, morph $> export), stamp ()))
ballarin@32804
   486
  |> (fn thy => fold_rev (Context.theory_map o activate_facts' export)
haftmann@31988
   487
      (all_registrations thy) thy);
ballarin@32801
   488
  (* FIXME deal with inheritance: propagate mixins to new children *)
haftmann@31988
   489
haftmann@31988
   490
haftmann@29361
   491
(*** Storing results ***)
haftmann@29361
   492
haftmann@29361
   493
(* Theorems *)
haftmann@29361
   494
haftmann@29361
   495
fun add_thmss loc kind args ctxt =
haftmann@29361
   496
  let
wenzelm@30777
   497
    val (Notes args', ctxt') = Element.activate_i (Notes (kind, args)) ctxt;
haftmann@29361
   498
    val ctxt'' = ctxt' |> ProofContext.theory (
haftmann@29392
   499
      (change_locale loc o apfst o apsnd) (cons (args', stamp ()))
haftmann@29392
   500
        #>
haftmann@29361
   501
      (* Registrations *)
haftmann@31988
   502
      (fn thy => fold_rev (fn (_, morph) =>
haftmann@29361
   503
            let
haftmann@29361
   504
              val args'' = snd args' |> Element.facts_map (Element.morph_ctxt morph) |>
haftmann@29361
   505
                Attrib.map_facts (Attrib.attribute_i thy)
wenzelm@30438
   506
            in PureThy.note_thmss kind args'' #> snd end)
haftmann@31988
   507
        (these_registrations thy loc) thy))
haftmann@29361
   508
  in ctxt'' end;
haftmann@29361
   509
haftmann@29361
   510
haftmann@29361
   511
(* Declarations *)
haftmann@29361
   512
wenzelm@35798
   513
fun add_declaration loc decl =
wenzelm@33643
   514
  add_thmss loc ""
wenzelm@35798
   515
    [((Binding.conceal Binding.empty,
wenzelm@35798
   516
        [Attrib.internal (fn phi => Thm.declaration_attribute (K (decl phi)))]),
wenzelm@33278
   517
      [([Drule.dummy_thm], [])])];
haftmann@29361
   518
wenzelm@35798
   519
fun add_syntax_declaration loc decl =
wenzelm@35798
   520
  ProofContext.theory ((change_locale loc o apfst o apfst) (cons (decl, stamp ())))
wenzelm@35798
   521
  #> add_declaration loc decl;
haftmann@29361
   522
wenzelm@30725
   523
haftmann@29361
   524
(*** Reasoning about locales ***)
haftmann@29361
   525
wenzelm@30725
   526
(* Storage for witnesses, intro and unfold rules *)
haftmann@29361
   527
wenzelm@33519
   528
structure Thms = Generic_Data
wenzelm@30725
   529
(
wenzelm@30725
   530
  type T = thm list * thm list * thm list;
wenzelm@30725
   531
  val empty = ([], [], []);
wenzelm@30725
   532
  val extend = I;
wenzelm@33519
   533
  fun merge ((witnesses1, intros1, unfolds1), (witnesses2, intros2, unfolds2)) =
wenzelm@30725
   534
   (Thm.merge_thms (witnesses1, witnesses2),
wenzelm@30725
   535
    Thm.merge_thms (intros1, intros2),
wenzelm@30725
   536
    Thm.merge_thms (unfolds1, unfolds2));
wenzelm@30725
   537
);
haftmann@29361
   538
wenzelm@30725
   539
val get_witnesses = #1 o Thms.get o Context.Proof;
wenzelm@30725
   540
val get_intros = #2 o Thms.get o Context.Proof;
wenzelm@30725
   541
val get_unfolds = #3 o Thms.get o Context.Proof;
haftmann@29361
   542
wenzelm@30725
   543
val witness_add =
wenzelm@30725
   544
  Thm.declaration_attribute (fn th => Thms.map (fn (x, y, z) => (Thm.add_thm th x, y, z)));
wenzelm@30725
   545
val intro_add =
wenzelm@30725
   546
  Thm.declaration_attribute (fn th => Thms.map (fn (x, y, z) => (x, Thm.add_thm th y, z)));
wenzelm@30725
   547
val unfold_add =
wenzelm@30725
   548
  Thm.declaration_attribute (fn th => Thms.map (fn (x, y, z) => (x, y, Thm.add_thm th z)));
haftmann@29361
   549
wenzelm@30725
   550
wenzelm@30725
   551
(* Tactic *)
wenzelm@30725
   552
wenzelm@30725
   553
fun intro_locales_tac eager ctxt =
haftmann@29361
   554
  Method.intros_tac
wenzelm@30725
   555
    (get_witnesses ctxt @ get_intros ctxt @ (if eager then get_unfolds ctxt else []));
haftmann@29361
   556
haftmann@29361
   557
val _ = Context.>> (Context.map_theory
wenzelm@30515
   558
 (Method.setup (Binding.name "intro_locales") (Scan.succeed (METHOD o intro_locales_tac false))
wenzelm@30515
   559
    "back-chain introduction rules of locales without unfolding predicates" #>
wenzelm@30515
   560
  Method.setup (Binding.name "unfold_locales") (Scan.succeed (METHOD o intro_locales_tac true))
wenzelm@30515
   561
    "back-chain all introduction rules of locales"));
haftmann@29361
   562
haftmann@29361
   563
end;
haftmann@29361
   564