src/HOL/Tools/record_package.ML
author wenzelm
Wed Oct 21 16:38:46 1998 +0200 (1998-10-21)
changeset 5713 27d4fcf5fe5f
parent 5707 b0e631634b5a
child 5890 92ba560f39ab
permissions -rw-r--r--
fixed field_injects;
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(*  Title:      HOL/Tools/record_package.ML
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    ID:         $Id$
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    Author:     Wolfgang Naraschewski and Markus Wenzel, TU Muenchen
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Extensible records with structural subtyping in HOL.
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*)
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signature BASIC_RECORD_PACKAGE =
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sig
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  val record_split_tac: int -> tactic
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  val record_split_name: string
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  val record_split_wrapper: string * wrapper
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end;
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signature RECORD_PACKAGE =
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sig
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  include BASIC_RECORD_PACKAGE
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  val quiet_mode: bool ref
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  val moreS: sort
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  val mk_fieldT: (string * typ) * typ -> typ
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  val dest_fieldT: typ -> (string * typ) * typ
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  val mk_field: (string * term) * term -> term
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  val mk_fst: term -> term
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  val mk_snd: term -> term
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  val mk_recordT: (string * typ) list * typ -> typ
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  val dest_recordT: typ -> (string * typ) list * typ
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  val mk_record: (string * term) list * term -> term
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  val mk_sel: term -> string -> term
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  val mk_update: term -> string * term -> term
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  val print_records: theory -> unit
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  val add_record: (string list * bstring) -> string option
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    -> (bstring * string) list -> theory -> theory
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  val add_record_i: (string list * bstring) -> (typ list * string) option
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    -> (bstring * typ) list -> theory -> theory
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  val setup: (theory -> theory) list
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end;
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structure RecordPackage: RECORD_PACKAGE =
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struct
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(*** utilities ***)
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(* messages *)
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val quiet_mode = ref false;
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fun message s = if ! quiet_mode then () else writeln s;
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(* attributes etc. *)        (* FIXME move to Provers *)
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fun add_iffs_global (thy, th) =
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  let
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    val ss = Simplifier.simpset_ref_of thy;
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    val cs = Classical.claset_ref_of thy;
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    val (cs', ss') = (! cs, ! ss) addIffs [Attribute.thm_of th];
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  in ss := ss'; cs := cs'; (thy, th) end;
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fun add_wrapper wrapper thy =
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  let val r = Classical.claset_ref_of thy
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  in r := ! r addSWrapper wrapper; thy end;
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(* definitions and equations *)
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infix 0 :== ===;
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val (op :==) = Logic.mk_defpair;
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val (op ===) = HOLogic.mk_Trueprop o HOLogic.mk_eq;
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fun get_defs thy specs = map (PureThy.get_tthm thy o fst) specs;
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(* proof by simplification *)
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fun prove_simp thy tacs simps =
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  let
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    val sign = Theory.sign_of thy;
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    val ss = Simplifier.addsimps (HOL_basic_ss, map Attribute.thm_of simps);
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    fun prove goal =
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      Attribute.tthm_of
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        (Goals.prove_goalw_cterm [] (Thm.cterm_of sign goal)
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          (K (tacs @ [ALLGOALS (Simplifier.simp_tac ss)]))
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        handle ERROR => error ("The error(s) above occurred while trying to prove "
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          ^ quote (Sign.string_of_term sign goal)));
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  in prove end;
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(*** syntax operations ***)
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(** name components **)
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val moreN = "more";
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val schemeN = "_scheme";
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val fieldN = "_field";
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val raw_fieldN = "_raw_field";
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val field_typeN = "_field_type";
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val fstN = "_val";
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val sndN = "_more";
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val updateN = "_update";
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val makeN = "make";
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val make_schemeN = "make_scheme";
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(*see datatype package*)
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val caseN = "_case";
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(** generic operations **)
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(* adhoc priming of vars *)
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fun prime (Free (x, T)) = Free (x ^ "'", T)
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  | prime t = raise TERM ("prime: no free variable", [t]);
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(* product case *)
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fun fst_fn T U = Abs ("x", T, Abs ("y", U, Bound 1));
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fun snd_fn T U = Abs ("x", T, Abs ("y", U, Bound 0));
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fun mk_prod_case name f p =
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  let
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    val fT as Type ("fun", [A, Type ("fun", [B, C])]) = fastype_of f;
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    val pT = fastype_of p;
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  in Const (suffix caseN name, fT --> pT --> C) $ f $ p end;
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(** tuple operations **)
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(* more type class *)
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val moreS = ["Record.more"];
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(* types *)
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fun mk_fieldT ((c, T), U) = Type (suffix field_typeN c, [T, U]);
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fun dest_fieldT (typ as Type (c_field_type, [T, U])) =
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      (case try (unsuffix field_typeN) c_field_type of
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        None => raise TYPE ("dest_fieldT", [typ], [])
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      | Some c => ((c, T), U))
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  | dest_fieldT typ = raise TYPE ("dest_fieldT", [typ], []);
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(* constructors *)
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fun mk_fieldC U (c, T) = (suffix fieldN c, T --> U --> mk_fieldT ((c, T), U));
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fun gen_mk_field sfx ((c, t), u) =
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  let val T = fastype_of t and U = fastype_of u
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  in Const (suffix sfx c, [T, U] ---> mk_fieldT ((c, T), U)) $ t $ u end;
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val mk_field = gen_mk_field fieldN;
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val mk_raw_field = gen_mk_field raw_fieldN;
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(* destructors *)
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fun mk_fstC U (c, T) = (suffix fstN c, mk_fieldT ((c, T), U) --> T);
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fun mk_sndC U (c, T) = (suffix sndN c, mk_fieldT ((c, T), U) --> U);
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fun dest_field fst_or_snd p =
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  let
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    val pT = fastype_of p;
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    val ((c, T), U) = dest_fieldT pT;
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    val (destN, destT) = if fst_or_snd then (fstN, T) else (sndN, U);
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  in Const (suffix destN c, pT --> destT) $ p end;
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val mk_fst = dest_field true;
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val mk_snd = dest_field false;
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(** record operations **)
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(* types *)
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val mk_recordT = foldr mk_fieldT;
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fun dest_recordT T =
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  (case try dest_fieldT T of
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    None => ([], T)
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  | Some (c_T, U) => apfst (cons c_T) (dest_recordT U));
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fun find_fieldT c rT =
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  (case assoc (fst (dest_recordT rT), c) of
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    None => raise TYPE ("find_field: " ^ c, [rT], [])
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  | Some T => T);
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(* constructors *)
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val mk_record = foldr mk_field;
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(* selectors *)
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fun mk_selC rT (c, T) = (c, rT --> T);
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fun mk_sel r c =
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  let val rT = fastype_of r
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  in Const (mk_selC rT (c, find_fieldT c rT)) $ r end;
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val mk_moreC = mk_selC;
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fun mk_more r c =
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  let val rT = fastype_of r
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  in Const (mk_moreC rT (c, snd (dest_recordT rT))) $ r end;
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(* updates *)
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fun mk_updateC rT (c, T) = (suffix updateN c, T --> rT --> rT);
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fun mk_update r (c, x) =
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  let val rT = fastype_of r
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  in Const (mk_updateC rT (c, find_fieldT c rT)) $ x $ r end;
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val mk_more_updateC = mk_updateC;
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fun mk_more_update r (c, x) =
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  let val rT = fastype_of r
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  in Const (mk_more_updateC rT (c, snd (dest_recordT rT))) $ x $ r end;
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(* make *)
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fun mk_makeC rT (c, Ts) = (c, Ts ---> rT);
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(** concrete syntax for records **)
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(* parse translations *)
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fun gen_field_tr mark sfx (t as Const (c, _) $ Free (name, _) $ arg) =
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      if c = mark then Syntax.const (suffix sfx name) $ arg
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      else raise TERM ("gen_field_tr: " ^ mark, [t])
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  | gen_field_tr mark _ t = raise TERM ("gen_field_tr: " ^ mark, [t]);
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fun gen_fields_tr sep mark sfx (tm as Const (c, _) $ t $ u) =
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      if c = sep then gen_field_tr mark sfx t :: gen_fields_tr sep mark sfx u
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      else [gen_field_tr mark sfx tm]
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  | gen_fields_tr _ mark sfx tm = [gen_field_tr mark sfx tm];
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fun gen_record_tr sep mark sfx unit [t] = foldr (op $) (gen_fields_tr sep mark sfx t, unit)
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  | gen_record_tr _ _ _ _ ts = raise TERM ("gen_record_tr", ts);
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fun gen_record_scheme_tr sep mark sfx [t, more] = foldr (op $) (gen_fields_tr sep mark sfx t, more)
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  | gen_record_scheme_tr _ _ _ ts = raise TERM ("gen_record_scheme_tr", ts);
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val record_type_tr = gen_record_tr "_field_types" "_field_type" field_typeN (Syntax.const "unit");
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val record_type_scheme_tr = gen_record_scheme_tr "_field_types" "_field_type" field_typeN;
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val record_tr = gen_record_tr "_fields" "_field" fieldN HOLogic.unit;
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val record_scheme_tr = gen_record_scheme_tr "_fields" "_field" fieldN;
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fun record_update_tr [t, u] =
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      foldr (op $) (rev (gen_fields_tr "_updates" "_update" updateN u), t)
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  | record_update_tr ts = raise TERM ("record_update_tr", ts);
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val parse_translation =
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 [("_record_type", record_type_tr),
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  ("_record_type_scheme", record_type_scheme_tr),
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  ("_record", record_tr),
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  ("_record_scheme", record_scheme_tr),
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  ("_record_update", record_update_tr)];
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(* print translations *)
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fun gen_fields_tr' mark sfx (tm as Const (name_field, _) $ t $ u) =
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      (case try (unsuffix sfx) name_field of
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        Some name =>
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          apfst (cons (Syntax.const mark $ Syntax.free name $ t)) (gen_fields_tr' mark sfx u)
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      | None => ([], tm))
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  | gen_fields_tr' _ _ tm = ([], tm);
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fun gen_record_tr' sep mark sfx is_unit record record_scheme tm =
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  let
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    val (ts, u) = gen_fields_tr' mark sfx tm;
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    val t' = foldr1 (fn (v, w) => Syntax.const sep $ v $ w) ts;
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  in
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    if is_unit u then Syntax.const record $ t'
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    else Syntax.const record_scheme $ t' $ u
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  end;
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val record_type_tr' =
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  gen_record_tr' "_field_types" "_field_type" field_typeN
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    (fn Const ("unit", _) => true | _ => false) "_record_type" "_record_type_scheme";
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val record_tr' =
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  gen_record_tr' "_fields" "_field" fieldN HOLogic.is_unit "_record" "_record_scheme";
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fun record_update_tr' tm =
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  let val (ts, u) = gen_fields_tr' "_update" updateN tm in
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    Syntax.const "_record_update" $ u $
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      foldr1 (fn (v, w) => Syntax.const "_updates" $ v $ w) (rev ts)
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  end;
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fun gen_field_tr' sfx tr' name =
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  let val name_sfx = suffix sfx name
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  in (name_sfx, fn [t, u] => tr' (Syntax.const name_sfx $ t $ u) | _ => raise Match) end;
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fun print_translation names =
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  map (gen_field_tr' field_typeN record_type_tr') names @
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  map (gen_field_tr' fieldN record_tr') names @
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  map (gen_field_tr' updateN record_update_tr') names;
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(*** extend theory by record definition ***)
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(** record info **)
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(* type record_info and parent_info *)
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type record_info =
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 {args: (string * sort) list,
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  parent: (typ list * string) option,
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  fields: (string * typ) list,
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  simps: tthm list};
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type parent_info =
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 {name: string,
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  fields: (string * typ) list,
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  simps: tthm list};
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(* data kind 'HOL/records' *)
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structure RecordsArgs =
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struct
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  val name = "HOL/records";
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  type T =
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    record_info Symtab.table *                          (*records*)
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      (thm Symtab.table * Simplifier.simpset);          (*field split rules*)
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  val empty = (Symtab.empty, (Symtab.empty, HOL_basic_ss));
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  val prep_ext = I;
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  fun merge ((recs1, (sps1, ss1)), (recs2, (sps2, ss2))) =
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    (Symtab.merge (K true) (recs1, recs2),
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      (Symtab.merge (K true) (sps1, sps2), Simplifier.merge_ss (ss1, ss2)));
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  fun print sg (recs, _) =
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    let
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      val prt_typ = Sign.pretty_typ sg;
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      val ext_const = Sign.cond_extern sg Sign.constK;
wenzelm@4867
   358
wenzelm@4867
   359
      fun pretty_parent None = []
wenzelm@4867
   360
        | pretty_parent (Some (Ts, name)) =
wenzelm@4867
   361
            [Pretty.block [prt_typ (Type (name, Ts)), Pretty.str " +"]];
wenzelm@4867
   362
wenzelm@4867
   363
      fun pretty_field (c, T) = Pretty.block
wenzelm@4867
   364
        [Pretty.str (ext_const c), Pretty.str " ::", Pretty.brk 1, Pretty.quote (prt_typ T)];
wenzelm@4867
   365
wenzelm@4895
   366
      fun pretty_record (name, {args, parent, fields, simps = _}) = Pretty.block (Pretty.fbreaks
wenzelm@4867
   367
        (Pretty.block [prt_typ (Type (name, map TFree args)), Pretty.str " = "] ::
wenzelm@4867
   368
          pretty_parent parent @ map pretty_field fields));
wenzelm@4867
   369
    in
wenzelm@5698
   370
      seq (Pretty.writeln o pretty_record) (Symtab.dest recs)
wenzelm@4867
   371
    end;
wenzelm@4867
   372
end;
wenzelm@4867
   373
wenzelm@5006
   374
structure RecordsData = TheoryDataFun(RecordsArgs);
wenzelm@5006
   375
val print_records = RecordsData.print;
wenzelm@5006
   376
wenzelm@4867
   377
wenzelm@5698
   378
(* get and put data *)
wenzelm@4867
   379
wenzelm@5698
   380
fun get_record thy name = Symtab.lookup (#1 (RecordsData.get thy), name);
wenzelm@4867
   381
wenzelm@4890
   382
fun put_record name info thy =
wenzelm@5698
   383
  let val (tab, sp) = RecordsData.get thy
wenzelm@5698
   384
  in RecordsData.put (Symtab.update ((name, info), tab), sp) thy end;
wenzelm@5698
   385
wenzelm@5698
   386
fun add_record_splits splits thy =
wenzelm@5698
   387
  let
wenzelm@5698
   388
    val (tab, (sps, ss)) = RecordsData.get thy;
wenzelm@5698
   389
    val simps = map #2 splits;
wenzelm@5698
   390
  in RecordsData.put (tab, (Symtab.extend (sps, splits), Simplifier.addsimps (ss, simps))) thy end;
wenzelm@4867
   391
wenzelm@4867
   392
wenzelm@4867
   393
(* parent records *)
wenzelm@4867
   394
wenzelm@4867
   395
fun inst_record thy (types, name) =
wenzelm@4867
   396
  let
wenzelm@4867
   397
    val sign = Theory.sign_of thy;
wenzelm@4867
   398
    fun err msg = error (msg ^ " parent record " ^ quote name);
wenzelm@4867
   399
wenzelm@4895
   400
    val {args, parent, fields, simps} =
wenzelm@4867
   401
      (case get_record thy name of Some info => info | None => err "Unknown");
wenzelm@4895
   402
    val _ = if length types <> length args then err "Bad number of arguments for" else ();
wenzelm@4867
   403
wenzelm@4867
   404
    fun bad_inst ((x, S), T) =
wenzelm@4867
   405
      if Sign.of_sort sign (T, S) then None else Some x
wenzelm@4867
   406
    val bads = mapfilter bad_inst (args ~~ types);
wenzelm@4867
   407
wenzelm@4867
   408
    val inst = map fst args ~~ types;
wenzelm@4867
   409
    val subst = Term.map_type_tfree (fn (x, _) => the (assoc (inst, x)));
wenzelm@4867
   410
  in
wenzelm@4895
   411
    if not (null bads) then
wenzelm@4867
   412
      err ("Ill-sorted instantiation of " ^ commas bads ^ " in")
wenzelm@4895
   413
    else (apsome (apfst (map subst)) parent, map (apsnd subst) fields, simps)
wenzelm@4867
   414
  end;
wenzelm@4867
   415
wenzelm@4867
   416
fun add_parents thy (None, parents) = parents
wenzelm@4867
   417
  | add_parents thy (Some (types, name), parents) =
wenzelm@4895
   418
      let val (pparent, pfields, psimps) = inst_record thy (types, name)
wenzelm@4895
   419
      in add_parents thy (pparent, {name = name, fields = pfields, simps = psimps} :: parents) end;
wenzelm@4867
   420
wenzelm@4867
   421
wenzelm@4867
   422
wenzelm@5698
   423
(** record field splitting **)
wenzelm@5698
   424
wenzelm@5698
   425
fun record_split_tac i st =
wenzelm@5698
   426
  let
wenzelm@5698
   427
    val (_, (sps, ss)) = RecordsData.get_sg (Thm.sign_of_thm st);
wenzelm@5698
   428
wenzelm@5698
   429
    fun is_fieldT (_, Type (a, [_, _])) = is_some (Symtab.lookup (sps, a))
wenzelm@5698
   430
      | is_fieldT _ = false;
wenzelm@5698
   431
    val params = Logic.strip_params (Library.nth_elem (i - 1, Thm.prems_of st));
wenzelm@5698
   432
  in
wenzelm@5698
   433
    if exists is_fieldT params then Simplifier.full_simp_tac ss i st
wenzelm@5698
   434
    else Seq.empty
wenzelm@5698
   435
  end handle Library.LIST _ => Seq.empty;
wenzelm@5698
   436
wenzelm@5707
   437
val record_split_name = "record_split_tac";
wenzelm@5707
   438
val record_split_wrapper = (record_split_name, fn tac => record_split_tac ORELSE' tac);
wenzelm@5698
   439
wenzelm@5698
   440
wenzelm@5698
   441
wenzelm@4890
   442
(** internal theory extenders **)
wenzelm@4867
   443
wenzelm@5698
   444
(* field_type_defs *)
wenzelm@5698
   445
wenzelm@5713
   446
fun field_type_def ((thy, simps), (name, tname, vs, T, U)) =
wenzelm@5698
   447
  let
wenzelm@5698
   448
    val full = Sign.full_name (sign_of thy);
wenzelm@5713
   449
    val (thy', {simps = simps', ...}) =
wenzelm@5698
   450
      thy
wenzelm@5698
   451
      |> setmp DatatypePackage.quiet_mode true
wenzelm@5698
   452
        (DatatypePackage.add_datatype_i true [tname]
wenzelm@5698
   453
          [(vs, tname, Syntax.NoSyn, [(name, [T, U], Syntax.NoSyn)])]);
wenzelm@5698
   454
    val thy'' =
wenzelm@5698
   455
      thy'
wenzelm@5698
   456
      |> setmp AxClass.quiet_mode true
wenzelm@5698
   457
        (AxClass.add_inst_arity_i (full tname, [HOLogic.termS, moreS], moreS) [] [] None);
wenzelm@5713
   458
  in (thy'', simps' @ simps) end;
wenzelm@5698
   459
wenzelm@5713
   460
fun field_type_defs args thy = foldl field_type_def ((thy, []), args);
wenzelm@5698
   461
wenzelm@5698
   462
wenzelm@4894
   463
(* field_definitions *)
wenzelm@4867
   464
wenzelm@4894
   465
fun field_definitions fields names zeta moreT more vars named_vars thy =
wenzelm@4890
   466
  let
wenzelm@5698
   467
    val sign = Theory.sign_of thy;
wenzelm@4890
   468
    val base = Sign.base_name;
wenzelm@5698
   469
    val full_path = Sign.full_name_path sign;
wenzelm@4867
   470
wenzelm@4867
   471
wenzelm@4890
   472
    (* prepare declarations and definitions *)
wenzelm@4867
   473
wenzelm@4890
   474
    (*field types*)
wenzelm@4890
   475
    fun mk_fieldT_spec c =
wenzelm@5698
   476
      (suffix raw_fieldN c, suffix field_typeN c,
wenzelm@5698
   477
        ["'a", zeta], TFree ("'a", HOLogic.termS), moreT);
wenzelm@4890
   478
    val fieldT_specs = map (mk_fieldT_spec o base) names;
wenzelm@4890
   479
wenzelm@5698
   480
    (*field constructors*)
wenzelm@4890
   481
    val field_decls = map (mk_fieldC moreT) fields;
wenzelm@4890
   482
wenzelm@4890
   483
    fun mk_field_spec (c, v) =
wenzelm@5698
   484
      mk_field ((c, v), more) :== mk_raw_field ((c, v), more);
wenzelm@4894
   485
    val field_specs = map mk_field_spec named_vars;
wenzelm@4890
   486
wenzelm@4890
   487
    (*field destructors*)
wenzelm@5698
   488
    val dest_decls = map (mk_fstC moreT) fields @ map (mk_sndC moreT) fields;
wenzelm@5698
   489
wenzelm@5698
   490
    fun mk_dest_spec dest f (c, T) =
wenzelm@5698
   491
      let val p = Free ("p", mk_fieldT ((c, T), moreT));
wenzelm@5698
   492
      in dest p :== mk_prod_case (suffix field_typeN c) (f T moreT) p end;
wenzelm@4890
   493
    val dest_specs =
wenzelm@5698
   494
      map (mk_dest_spec mk_fst fst_fn) fields @
wenzelm@5698
   495
      map (mk_dest_spec mk_snd snd_fn) fields;
wenzelm@4890
   496
wenzelm@4890
   497
wenzelm@4890
   498
    (* prepare theorems *)
wenzelm@4894
   499
wenzelm@5713
   500
    (*constructor injects*)
wenzelm@5713
   501
    fun mk_inject_prop (c, v) =
wenzelm@5713
   502
      HOLogic.mk_eq (mk_field ((c, v), more), mk_field ((c, prime v), prime more)) ===
wenzelm@5713
   503
        (HOLogic.conj $ HOLogic.mk_eq (v, prime v) $ HOLogic.mk_eq (more, prime more));
wenzelm@5713
   504
    val inject_props = map mk_inject_prop named_vars;
wenzelm@5713
   505
wenzelm@5698
   506
    (*destructor conversions*)
wenzelm@4890
   507
    fun mk_dest_prop dest dest' (c, v) =
wenzelm@4894
   508
      dest (mk_field ((c, v), more)) === dest' (v, more);
wenzelm@4890
   509
    val dest_props =
wenzelm@4895
   510
      map (mk_dest_prop mk_fst fst) named_vars @
wenzelm@4895
   511
      map (mk_dest_prop mk_snd snd) named_vars;
wenzelm@4890
   512
wenzelm@5698
   513
    (*surjective pairing*)
wenzelm@5698
   514
    fun mk_surj_prop (c, T) =
wenzelm@5698
   515
      let val p = Free ("p", mk_fieldT ((c, T), moreT));
wenzelm@5698
   516
      in p === mk_field ((c, mk_fst p), mk_snd p) end;
wenzelm@5698
   517
    val surj_props = map mk_surj_prop fields;
wenzelm@4890
   518
wenzelm@5698
   519
wenzelm@5698
   520
    (* 1st stage: types_thy *)
wenzelm@5698
   521
wenzelm@5713
   522
    val (types_thy, simps) =
wenzelm@5698
   523
      thy
wenzelm@5698
   524
      |> field_type_defs fieldT_specs;
wenzelm@5698
   525
wenzelm@5698
   526
    val datatype_simps = map Attribute.tthm_of simps;
wenzelm@5698
   527
wenzelm@5698
   528
wenzelm@5698
   529
    (* 2nd stage: defs_thy *)
wenzelm@4890
   530
wenzelm@4890
   531
    val defs_thy =
wenzelm@5698
   532
      types_thy
wenzelm@5698
   533
       |> (Theory.add_consts_i o map (Syntax.no_syn o apfst base))
wenzelm@5698
   534
         (field_decls @ dest_decls)
wenzelm@5698
   535
       |> (PureThy.add_defs_i o map (fn x => (x, [Attribute.tag_internal])))
wenzelm@5698
   536
         (field_specs @ dest_specs);
wenzelm@4890
   537
wenzelm@4890
   538
    val field_defs = get_defs defs_thy field_specs;
wenzelm@4890
   539
    val dest_defs = get_defs defs_thy dest_specs;
wenzelm@4890
   540
wenzelm@4890
   541
wenzelm@5698
   542
    (* 3rd stage: thms_thy *)
wenzelm@5698
   543
wenzelm@5698
   544
    val prove = prove_simp defs_thy;
wenzelm@5713
   545
    val prove_std = prove [] (field_defs @ dest_defs @ datatype_simps);
wenzelm@4890
   546
wenzelm@5713
   547
    val field_injects = map prove_std inject_props;
wenzelm@5713
   548
    val dest_convs = map prove_std dest_props;
wenzelm@5698
   549
    val surj_pairs = map (prove [DatatypePackage.induct_tac "p" 1]
wenzelm@5698
   550
      (map (apfst Thm.symmetric) field_defs @ dest_convs)) surj_props;
wenzelm@5698
   551
wenzelm@5707
   552
    fun mk_split th = SplitPairedAll.rule (th RS eq_reflection);
wenzelm@5713
   553
    val field_splits = map (fn (th, _) => Attribute.tthm_of (mk_split th)) surj_pairs;
wenzelm@4894
   554
wenzelm@4890
   555
    val thms_thy =
wenzelm@4890
   556
      defs_thy
wenzelm@4890
   557
      |> (PureThy.add_tthmss o map Attribute.none)
wenzelm@4890
   558
        [("field_defs", field_defs),
wenzelm@4890
   559
          ("dest_defs", dest_defs),
wenzelm@5698
   560
          ("dest_convs", dest_convs),
wenzelm@5698
   561
          ("surj_pairs", surj_pairs),
wenzelm@5713
   562
          ("field_splits", field_splits)];
wenzelm@4890
   563
wenzelm@5713
   564
  in (thms_thy, dest_convs, field_injects, field_splits) end;
wenzelm@4890
   565
wenzelm@4890
   566
wenzelm@4890
   567
(* record_definition *)
wenzelm@4867
   568
wenzelm@4867
   569
fun record_definition (args, bname) parent (parents: parent_info list) bfields thy =
wenzelm@4867
   570
  let
wenzelm@4867
   571
    val sign = Theory.sign_of thy;
wenzelm@4867
   572
    val full = Sign.full_name_path sign bname;
wenzelm@4890
   573
    val base = Sign.base_name;
wenzelm@4867
   574
wenzelm@4867
   575
wenzelm@4890
   576
    (* basic components *)
wenzelm@4867
   577
wenzelm@4867
   578
    val alphas = map fst args;
wenzelm@5197
   579
    val name = Sign.full_name sign bname;       (*not made part of record name space!*)
wenzelm@4890
   580
wenzelm@4867
   581
    val parent_fields = flat (map #fields parents);
wenzelm@4890
   582
    val parent_names = map fst parent_fields;
wenzelm@4890
   583
    val parent_types = map snd parent_fields;
wenzelm@4890
   584
    val parent_len = length parent_fields;
wenzelm@4890
   585
    val parent_xs = variantlist (map (base o fst) parent_fields, [moreN]);
wenzelm@4890
   586
    val parent_vars = ListPair.map Free (parent_xs, parent_types);
wenzelm@4894
   587
    val parent_named_vars = parent_names ~~ parent_vars;
wenzelm@4890
   588
wenzelm@4867
   589
    val fields = map (apfst full) bfields;
wenzelm@4890
   590
    val names = map fst fields;
wenzelm@4890
   591
    val types = map snd fields;
wenzelm@4890
   592
    val len = length fields;
wenzelm@4890
   593
    val xs = variantlist (map fst bfields, moreN :: parent_xs);
wenzelm@4890
   594
    val vars = ListPair.map Free (xs, types);
wenzelm@4894
   595
    val named_vars = names ~~ vars;
wenzelm@4867
   596
wenzelm@4867
   597
    val all_fields = parent_fields @ fields;
wenzelm@4890
   598
    val all_names = parent_names @ names;
wenzelm@4890
   599
    val all_types = parent_types @ types;
wenzelm@4890
   600
    val all_len = parent_len + len;
wenzelm@4890
   601
    val all_xs = parent_xs @ xs;
wenzelm@4890
   602
    val all_vars = parent_vars @ vars;
wenzelm@4894
   603
    val all_named_vars = parent_named_vars @ named_vars;
wenzelm@4867
   604
wenzelm@4867
   605
    val zeta = variant alphas "'z";
wenzelm@4867
   606
    val moreT = TFree (zeta, moreS);
wenzelm@4895
   607
    val more = Free (moreN, moreT);
wenzelm@5197
   608
    val full_moreN = full moreN;
wenzelm@5197
   609
    fun more_part t = mk_more t full_moreN;
wenzelm@5197
   610
    fun more_part_update t x = mk_more_update t (full_moreN, x);
wenzelm@4894
   611
wenzelm@4894
   612
    val parent_more = funpow parent_len mk_snd;
wenzelm@4894
   613
    val idxs = 0 upto (len - 1);
wenzelm@4867
   614
wenzelm@4867
   615
    val rec_schemeT = mk_recordT (all_fields, moreT);
wenzelm@4894
   616
    val rec_scheme = mk_record (all_named_vars, more);
wenzelm@4890
   617
    val r = Free ("r", rec_schemeT);
wenzelm@4894
   618
    val recT = mk_recordT (all_fields, HOLogic.unitT);
wenzelm@4867
   619
wenzelm@4867
   620
wenzelm@4890
   621
    (* prepare print translation functions *)
wenzelm@4867
   622
wenzelm@5698
   623
    val field_tr's =
wenzelm@5698
   624
      print_translation (distinct (flat (map NameSpace.accesses (full_moreN :: names))));
wenzelm@4867
   625
wenzelm@4867
   626
wenzelm@4867
   627
    (* prepare declarations *)
wenzelm@4867
   628
wenzelm@5197
   629
    val sel_decls = map (mk_selC rec_schemeT) bfields @
wenzelm@5197
   630
      [mk_moreC rec_schemeT (moreN, moreT)];
wenzelm@5197
   631
    val update_decls = map (mk_updateC rec_schemeT) bfields @
wenzelm@5197
   632
      [mk_more_updateC rec_schemeT (moreN, moreT)];
wenzelm@4890
   633
    val make_decls =
wenzelm@4890
   634
      [(mk_makeC rec_schemeT (make_schemeN, all_types @ [moreT])),
wenzelm@4890
   635
       (mk_makeC recT (makeN, all_types))];
wenzelm@4867
   636
wenzelm@4867
   637
wenzelm@4867
   638
    (* prepare definitions *)
wenzelm@4867
   639
wenzelm@4895
   640
    (*record (scheme) type abbreviation*)
wenzelm@4890
   641
    val recordT_specs =
wenzelm@4890
   642
      [(suffix schemeN bname, alphas @ [zeta], rec_schemeT, Syntax.NoSyn),
wenzelm@4890
   643
        (bname, alphas, recT, Syntax.NoSyn)];
wenzelm@4867
   644
wenzelm@4894
   645
    (*selectors*)
wenzelm@4890
   646
    fun mk_sel_spec (i, c) =
wenzelm@4894
   647
      mk_sel r c :== mk_fst (funpow i mk_snd (parent_more r));
wenzelm@4894
   648
    val sel_specs =
wenzelm@4894
   649
      ListPair.map mk_sel_spec (idxs, names) @
wenzelm@4894
   650
        [more_part r :== funpow len mk_snd (parent_more r)];
wenzelm@4890
   651
wenzelm@4890
   652
    (*updates*)
wenzelm@4894
   653
    val all_sels = all_names ~~ map (mk_sel r) all_names;
wenzelm@4890
   654
    fun mk_upd_spec (i, (c, x)) =
wenzelm@4894
   655
      mk_update r (c, x) :==
wenzelm@4894
   656
        mk_record (nth_update (c, x) (parent_len + i, all_sels), more_part r)
wenzelm@5197
   657
    val update_specs =
wenzelm@5197
   658
      ListPair.map mk_upd_spec (idxs, named_vars) @
wenzelm@5197
   659
        [more_part_update r more :== mk_record (all_sels, more)];
wenzelm@4867
   660
wenzelm@4867
   661
    (*makes*)
wenzelm@4890
   662
    val make_scheme = Const (mk_makeC rec_schemeT (full make_schemeN, all_types @ [moreT]));
wenzelm@4890
   663
    val make = Const (mk_makeC recT (full makeN, all_types));
wenzelm@4867
   664
    val make_specs =
wenzelm@4894
   665
      [list_comb (make_scheme, all_vars) $ more :== rec_scheme,
wenzelm@4894
   666
        list_comb (make, all_vars) :== mk_record (all_named_vars, HOLogic.unit)];
wenzelm@4894
   667
wenzelm@4894
   668
wenzelm@4894
   669
    (* prepare propositions *)
wenzelm@4894
   670
wenzelm@4894
   671
    (*selectors*)
wenzelm@4894
   672
    val sel_props =
wenzelm@4894
   673
      map (fn (c, x) => mk_sel rec_scheme c === x) named_vars @
wenzelm@4894
   674
        [more_part rec_scheme === more];
wenzelm@4894
   675
wenzelm@4894
   676
    (*updates*)
wenzelm@4894
   677
    fun mk_upd_prop (i, (c, T)) =
wenzelm@4894
   678
      let val x' = Free (variant all_xs (base c ^ "'"), T) in
wenzelm@4894
   679
        mk_update rec_scheme (c, x') ===
wenzelm@4894
   680
          mk_record (nth_update (c, x') (parent_len + i, all_named_vars), more)
wenzelm@4894
   681
      end;
wenzelm@5197
   682
    val update_props =
wenzelm@5197
   683
      ListPair.map mk_upd_prop (idxs, fields) @
wenzelm@5197
   684
        let val more' = Free (variant all_xs (moreN ^ "'"), moreT)
wenzelm@5197
   685
        in [more_part_update rec_scheme more' === mk_record (all_named_vars, more')] end;
wenzelm@4867
   686
wenzelm@4867
   687
wenzelm@4890
   688
    (* 1st stage: fields_thy *)
wenzelm@4867
   689
wenzelm@5713
   690
    val (fields_thy, field_simps, field_injects, field_splits) =
wenzelm@4867
   691
      thy
wenzelm@4867
   692
      |> Theory.add_path bname
wenzelm@4894
   693
      |> field_definitions fields names zeta moreT more vars named_vars;
wenzelm@4867
   694
wenzelm@5713
   695
    val named_splits = map2 (fn (c, (th, _)) => (suffix field_typeN c, th)) (names, field_splits);
wenzelm@5698
   696
wenzelm@4867
   697
wenzelm@4890
   698
    (* 2nd stage: defs_thy *)
wenzelm@4890
   699
wenzelm@4890
   700
    val defs_thy =
wenzelm@4890
   701
      fields_thy
wenzelm@4890
   702
      |> Theory.parent_path
wenzelm@5197
   703
      |> Theory.add_tyabbrs_i recordT_specs     (*not made part of record name space!*)
wenzelm@4890
   704
      |> Theory.add_path bname
wenzelm@5197
   705
      |> Theory.add_trfuns ([], [], field_tr's, [])
wenzelm@4894
   706
      |> (Theory.add_consts_i o map Syntax.no_syn)
wenzelm@4894
   707
        (sel_decls @ update_decls @ make_decls)
wenzelm@5197
   708
      |> (PureThy.add_defs_i o map (fn x => (x, [Attribute.tag_internal])))
wenzelm@5212
   709
        (sel_specs @ update_specs)
wenzelm@5212
   710
      |> (PureThy.add_defs_i o map Attribute.none) make_specs;
wenzelm@4890
   711
wenzelm@4890
   712
    val sel_defs = get_defs defs_thy sel_specs;
wenzelm@4890
   713
    val update_defs = get_defs defs_thy update_specs;
wenzelm@4890
   714
    val make_defs = get_defs defs_thy make_specs;
wenzelm@4890
   715
wenzelm@4890
   716
wenzelm@4890
   717
    (* 3rd stage: thms_thy *)
wenzelm@4890
   718
wenzelm@4895
   719
    val parent_simps = flat (map #simps parents);
wenzelm@5698
   720
    val prove = prove_simp defs_thy [];
wenzelm@4890
   721
wenzelm@4895
   722
    val sel_convs = map (prove (parent_simps @ sel_defs @ field_simps)) sel_props;
wenzelm@4895
   723
    val update_convs = map (prove (parent_simps @ update_defs @ sel_convs)) update_props;
wenzelm@4894
   724
wenzelm@4894
   725
    val simps = field_simps @ sel_convs @ update_convs @ make_defs;
wenzelm@4867
   726
wenzelm@4867
   727
    val thms_thy =
wenzelm@4867
   728
      defs_thy
wenzelm@4867
   729
      |> (PureThy.add_tthmss o map Attribute.none)
wenzelm@4895
   730
        [("select_defs", sel_defs),
wenzelm@4890
   731
          ("update_defs", update_defs),
wenzelm@4894
   732
          ("make_defs", make_defs),
wenzelm@4895
   733
          ("select_convs", sel_convs),
wenzelm@4894
   734
          ("update_convs", update_convs)]
wenzelm@5707
   735
      |> PureThy.add_tthmss
wenzelm@5707
   736
        [(("simps", simps), [Simplifier.simp_add_global]),
wenzelm@5713
   737
         (("iffs", field_injects), [add_iffs_global])];
wenzelm@4867
   738
wenzelm@4867
   739
wenzelm@4890
   740
    (* 4th stage: final_thy *)
wenzelm@4867
   741
wenzelm@4867
   742
    val final_thy =
wenzelm@4867
   743
      thms_thy
wenzelm@4895
   744
      |> put_record name {args = args, parent = parent, fields = fields, simps = simps}
wenzelm@5713
   745
      |> add_record_splits named_splits
wenzelm@4867
   746
      |> Theory.parent_path;
wenzelm@4867
   747
wenzelm@4867
   748
  in final_thy end;
wenzelm@4867
   749
wenzelm@4867
   750
wenzelm@4867
   751
wenzelm@4867
   752
(** theory extender interface **)
wenzelm@4867
   753
wenzelm@4867
   754
(* prepare arguments *)
wenzelm@4867
   755
wenzelm@4894
   756
(*note: read_raw_typ avoids expanding type abbreviations*)
wenzelm@4867
   757
fun read_raw_parent sign s =
wenzelm@4867
   758
  (case Sign.read_raw_typ (sign, K None) s handle TYPE (msg, _, _) => error msg of
wenzelm@4867
   759
    Type (name, Ts) => (Ts, name)
wenzelm@4867
   760
  | _ => error ("Bad parent record specification: " ^ quote s));
wenzelm@4867
   761
wenzelm@4867
   762
fun read_typ sign (env, s) =
wenzelm@4867
   763
  let
wenzelm@5060
   764
    fun def_sort (x, ~1) = assoc (env, x)
wenzelm@5060
   765
      | def_sort _ = None;
wenzelm@5060
   766
    val T = Type.no_tvars (Sign.read_typ (sign, def_sort) s) handle TYPE (msg, _, _) => error msg;
wenzelm@4867
   767
  in (Term.add_typ_tfrees (T, env), T) end;
wenzelm@4867
   768
wenzelm@4867
   769
fun cert_typ sign (env, raw_T) =
wenzelm@4867
   770
  let val T = Type.no_tvars (Sign.certify_typ sign raw_T) handle TYPE (msg, _, _) => error msg
wenzelm@4867
   771
  in (Term.add_typ_tfrees (T, env), T) end;
wenzelm@4867
   772
wenzelm@4867
   773
wenzelm@4867
   774
(* add_record *)
wenzelm@4867
   775
wenzelm@4895
   776
(*we do all preparations and error checks here, deferring the real
wenzelm@4895
   777
  work to record_definition*)
wenzelm@4890
   778
wenzelm@4867
   779
fun gen_add_record prep_typ prep_raw_parent (params, bname) raw_parent raw_fields thy =
wenzelm@4867
   780
  let
paulson@4970
   781
    val _ = Theory.requires thy "Record" "record definitions";
wenzelm@4867
   782
    val sign = Theory.sign_of thy;
wenzelm@5698
   783
    val _ = message ("Defining record " ^ quote bname ^ " ...");
wenzelm@4867
   784
wenzelm@4867
   785
wenzelm@4867
   786
    (* parents *)
wenzelm@4867
   787
wenzelm@4867
   788
    fun prep_inst T = snd (cert_typ sign ([], T));
wenzelm@4867
   789
wenzelm@4867
   790
    val parent = apsome (apfst (map prep_inst) o prep_raw_parent sign) raw_parent
wenzelm@4867
   791
      handle ERROR => error ("The error(s) above in parent record specification");
wenzelm@4867
   792
    val parents = add_parents thy (parent, []);
wenzelm@4867
   793
wenzelm@4867
   794
    val init_env =
wenzelm@4867
   795
      (case parent of
wenzelm@4867
   796
        None => []
wenzelm@4867
   797
      | Some (types, _) => foldr Term.add_typ_tfrees (types, []));
wenzelm@4867
   798
wenzelm@4867
   799
wenzelm@4867
   800
    (* fields *)
wenzelm@4867
   801
wenzelm@4967
   802
    fun prep_field (env, (c, raw_T)) =
wenzelm@4967
   803
      let val (env', T) = prep_typ sign (env, raw_T) handle ERROR =>
wenzelm@4967
   804
        error ("The error(s) above occured in field " ^ quote c)
wenzelm@4967
   805
      in (env', (c, T)) end;
wenzelm@4867
   806
wenzelm@4967
   807
    val (envir, bfields) = foldl_map prep_field (init_env, raw_fields);
wenzelm@4867
   808
    val envir_names = map fst envir;
wenzelm@4867
   809
wenzelm@4867
   810
wenzelm@4867
   811
    (* args *)
wenzelm@4867
   812
wenzelm@4867
   813
    val defaultS = Sign.defaultS sign;
wenzelm@4867
   814
    val args = map (fn x => (x, if_none (assoc (envir, x)) defaultS)) params;
wenzelm@4867
   815
wenzelm@4867
   816
wenzelm@4867
   817
    (* errors *)
wenzelm@4867
   818
wenzelm@4890
   819
    val name = Sign.full_name sign bname;
wenzelm@4890
   820
    val err_dup_record =
wenzelm@4890
   821
      if is_none (get_record thy name) then []
wenzelm@4890
   822
      else ["Duplicate definition of record " ^ quote name];
wenzelm@4890
   823
wenzelm@4867
   824
    val err_dup_parms =
wenzelm@4867
   825
      (case duplicates params of
wenzelm@4867
   826
        [] => []
wenzelm@4890
   827
      | dups => ["Duplicate parameter(s) " ^ commas dups]);
wenzelm@4867
   828
wenzelm@4867
   829
    val err_extra_frees =
wenzelm@4867
   830
      (case gen_rems (op =) (envir_names, params) of
wenzelm@4867
   831
        [] => []
wenzelm@4890
   832
      | extras => ["Extra free type variable(s) " ^ commas extras]);
wenzelm@4867
   833
wenzelm@4890
   834
    val err_no_fields = if null bfields then ["No fields present"] else [];
wenzelm@4867
   835
wenzelm@4867
   836
    val err_dup_fields =
wenzelm@4867
   837
      (case duplicates (map fst bfields) of
wenzelm@4867
   838
        [] => []
wenzelm@4890
   839
      | dups => ["Duplicate field(s) " ^ commas_quote dups]);
wenzelm@4890
   840
wenzelm@4890
   841
    val err_bad_fields =
wenzelm@4890
   842
      if forall (not_equal moreN o fst) bfields then []
wenzelm@4890
   843
      else ["Illegal field name " ^ quote moreN];
wenzelm@4867
   844
wenzelm@4867
   845
    val err_dup_sorts =
wenzelm@4867
   846
      (case duplicates envir_names of
wenzelm@4867
   847
        [] => []
wenzelm@4867
   848
      | dups => ["Inconsistent sort constraints for " ^ commas dups]);
wenzelm@4867
   849
wenzelm@4867
   850
    val errs =
wenzelm@4890
   851
      err_dup_record @ err_dup_parms @ err_extra_frees @ err_no_fields @
wenzelm@4890
   852
      err_dup_fields @ err_bad_fields @ err_dup_sorts;
wenzelm@4867
   853
  in
wenzelm@4890
   854
    if null errs then () else error (cat_lines errs);
wenzelm@4867
   855
    thy |> record_definition (args, bname) parent parents bfields
wenzelm@4867
   856
  end
wenzelm@4867
   857
  handle ERROR => error ("Failed to define record " ^ quote bname);
wenzelm@4867
   858
wenzelm@4867
   859
val add_record = gen_add_record read_typ read_raw_parent;
wenzelm@4867
   860
val add_record_i = gen_add_record cert_typ (K I);
wenzelm@4867
   861
wenzelm@4867
   862
wenzelm@4867
   863
wenzelm@4867
   864
(** setup theory **)
wenzelm@4867
   865
wenzelm@4867
   866
val setup =
wenzelm@5006
   867
 [RecordsData.init,
wenzelm@5698
   868
  Theory.add_trfuns ([], parse_translation, [], []),
wenzelm@5698
   869
  add_wrapper record_split_wrapper];
wenzelm@4867
   870
wenzelm@4867
   871
wenzelm@4867
   872
end;
wenzelm@5698
   873
wenzelm@5698
   874
wenzelm@5698
   875
structure BasicRecordPackage: BASIC_RECORD_PACKAGE = RecordPackage;
wenzelm@5698
   876
open BasicRecordPackage;