src/HOL/Tools/record_package.ML
author wenzelm
Fri Apr 30 18:10:03 1999 +0200 (1999-04-30)
changeset 6556 daa00919502b
parent 6519 5bd1c469e742
child 6723 f342449d73ca
permissions -rw-r--r--
theory data: copy;
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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 * {simps: thm list, iffs: thm list}
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  val add_record_i: (string list * bstring) -> (typ list * string) option
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    -> (bstring * typ) list -> theory -> theory * {simps: thm list, iffs: thm list}
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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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(* wrappers *)
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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_thm 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, simps);
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    fun prove goal =
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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: thm 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: thm 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 copy = I;
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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;
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      fun pretty_parent None = []
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        | pretty_parent (Some (Ts, name)) =
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            [Pretty.block [prt_typ (Type (name, Ts)), Pretty.str " +"]];
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      fun pretty_field (c, T) = Pretty.block
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        [Pretty.str (ext_const c), Pretty.str " ::", Pretty.brk 1, Pretty.quote (prt_typ T)];
wenzelm@4867
   358
wenzelm@4895
   359
      fun pretty_record (name, {args, parent, fields, simps = _}) = Pretty.block (Pretty.fbreaks
wenzelm@4867
   360
        (Pretty.block [prt_typ (Type (name, map TFree args)), Pretty.str " = "] ::
wenzelm@4867
   361
          pretty_parent parent @ map pretty_field fields));
wenzelm@4867
   362
    in
wenzelm@5698
   363
      seq (Pretty.writeln o pretty_record) (Symtab.dest recs)
wenzelm@4867
   364
    end;
wenzelm@4867
   365
end;
wenzelm@4867
   366
wenzelm@5006
   367
structure RecordsData = TheoryDataFun(RecordsArgs);
wenzelm@5006
   368
val print_records = RecordsData.print;
wenzelm@5006
   369
wenzelm@4867
   370
wenzelm@5698
   371
(* get and put data *)
wenzelm@4867
   372
wenzelm@5698
   373
fun get_record thy name = Symtab.lookup (#1 (RecordsData.get thy), name);
wenzelm@4867
   374
wenzelm@4890
   375
fun put_record name info thy =
wenzelm@5698
   376
  let val (tab, sp) = RecordsData.get thy
wenzelm@5698
   377
  in RecordsData.put (Symtab.update ((name, info), tab), sp) thy end;
wenzelm@5698
   378
wenzelm@5698
   379
fun add_record_splits splits thy =
wenzelm@5698
   380
  let
wenzelm@5698
   381
    val (tab, (sps, ss)) = RecordsData.get thy;
wenzelm@5698
   382
    val simps = map #2 splits;
wenzelm@5698
   383
  in RecordsData.put (tab, (Symtab.extend (sps, splits), Simplifier.addsimps (ss, simps))) thy end;
wenzelm@4867
   384
wenzelm@4867
   385
wenzelm@4867
   386
(* parent records *)
wenzelm@4867
   387
wenzelm@4867
   388
fun inst_record thy (types, name) =
wenzelm@4867
   389
  let
wenzelm@4867
   390
    val sign = Theory.sign_of thy;
wenzelm@4867
   391
    fun err msg = error (msg ^ " parent record " ^ quote name);
wenzelm@4867
   392
wenzelm@4895
   393
    val {args, parent, fields, simps} =
wenzelm@4867
   394
      (case get_record thy name of Some info => info | None => err "Unknown");
wenzelm@4895
   395
    val _ = if length types <> length args then err "Bad number of arguments for" else ();
wenzelm@4867
   396
wenzelm@4867
   397
    fun bad_inst ((x, S), T) =
wenzelm@4867
   398
      if Sign.of_sort sign (T, S) then None else Some x
wenzelm@4867
   399
    val bads = mapfilter bad_inst (args ~~ types);
wenzelm@4867
   400
wenzelm@4867
   401
    val inst = map fst args ~~ types;
wenzelm@4867
   402
    val subst = Term.map_type_tfree (fn (x, _) => the (assoc (inst, x)));
wenzelm@4867
   403
  in
wenzelm@4895
   404
    if not (null bads) then
wenzelm@4867
   405
      err ("Ill-sorted instantiation of " ^ commas bads ^ " in")
wenzelm@4895
   406
    else (apsome (apfst (map subst)) parent, map (apsnd subst) fields, simps)
wenzelm@4867
   407
  end;
wenzelm@4867
   408
wenzelm@4867
   409
fun add_parents thy (None, parents) = parents
wenzelm@4867
   410
  | add_parents thy (Some (types, name), parents) =
wenzelm@4895
   411
      let val (pparent, pfields, psimps) = inst_record thy (types, name)
wenzelm@4895
   412
      in add_parents thy (pparent, {name = name, fields = pfields, simps = psimps} :: parents) end;
wenzelm@4867
   413
wenzelm@4867
   414
wenzelm@4867
   415
wenzelm@5698
   416
(** record field splitting **)
wenzelm@5698
   417
wenzelm@6358
   418
(* tactic *)
wenzelm@6358
   419
wenzelm@5698
   420
fun record_split_tac i st =
wenzelm@5698
   421
  let
wenzelm@5698
   422
    val (_, (sps, ss)) = RecordsData.get_sg (Thm.sign_of_thm st);
wenzelm@5698
   423
wenzelm@5698
   424
    fun is_fieldT (_, Type (a, [_, _])) = is_some (Symtab.lookup (sps, a))
wenzelm@5698
   425
      | is_fieldT _ = false;
wenzelm@5698
   426
    val params = Logic.strip_params (Library.nth_elem (i - 1, Thm.prems_of st));
wenzelm@5698
   427
  in
wenzelm@5698
   428
    if exists is_fieldT params then Simplifier.full_simp_tac ss i st
wenzelm@5698
   429
    else Seq.empty
wenzelm@5698
   430
  end handle Library.LIST _ => Seq.empty;
wenzelm@5698
   431
wenzelm@6358
   432
wenzelm@6358
   433
(* wrapper *)
wenzelm@6358
   434
wenzelm@5707
   435
val record_split_name = "record_split_tac";
wenzelm@5707
   436
val record_split_wrapper = (record_split_name, fn tac => record_split_tac ORELSE' tac);
wenzelm@5698
   437
wenzelm@5698
   438
wenzelm@6358
   439
(* method *)
wenzelm@6358
   440
wenzelm@6358
   441
val record_split_method =
wenzelm@6358
   442
  ("record_split", Method.no_args (Method.METHOD0 (FIRSTGOAL record_split_tac)),
wenzelm@6358
   443
    "split record fields");
wenzelm@6358
   444
wenzelm@6358
   445
wenzelm@5698
   446
wenzelm@4890
   447
(** internal theory extenders **)
wenzelm@4867
   448
wenzelm@5698
   449
(* field_type_defs *)
wenzelm@5698
   450
wenzelm@5713
   451
fun field_type_def ((thy, simps), (name, tname, vs, T, U)) =
wenzelm@5698
   452
  let
wenzelm@6394
   453
    val full = Sign.full_name (Theory.sign_of thy);
wenzelm@5713
   454
    val (thy', {simps = simps', ...}) =
wenzelm@5698
   455
      thy
wenzelm@5698
   456
      |> setmp DatatypePackage.quiet_mode true
wenzelm@5698
   457
        (DatatypePackage.add_datatype_i true [tname]
wenzelm@5698
   458
          [(vs, tname, Syntax.NoSyn, [(name, [T, U], Syntax.NoSyn)])]);
wenzelm@5698
   459
    val thy'' =
wenzelm@5698
   460
      thy'
wenzelm@5698
   461
      |> setmp AxClass.quiet_mode true
wenzelm@5698
   462
        (AxClass.add_inst_arity_i (full tname, [HOLogic.termS, moreS], moreS) [] [] None);
wenzelm@5713
   463
  in (thy'', simps' @ simps) end;
wenzelm@5698
   464
wenzelm@5713
   465
fun field_type_defs args thy = foldl field_type_def ((thy, []), args);
wenzelm@5698
   466
wenzelm@5698
   467
wenzelm@4894
   468
(* field_definitions *)
wenzelm@4867
   469
wenzelm@4894
   470
fun field_definitions fields names zeta moreT more vars named_vars thy =
wenzelm@4890
   471
  let
wenzelm@5698
   472
    val sign = Theory.sign_of thy;
wenzelm@4890
   473
    val base = Sign.base_name;
wenzelm@5698
   474
    val full_path = Sign.full_name_path sign;
wenzelm@4867
   475
wenzelm@4867
   476
wenzelm@4890
   477
    (* prepare declarations and definitions *)
wenzelm@4867
   478
wenzelm@4890
   479
    (*field types*)
wenzelm@4890
   480
    fun mk_fieldT_spec c =
wenzelm@5698
   481
      (suffix raw_fieldN c, suffix field_typeN c,
wenzelm@5698
   482
        ["'a", zeta], TFree ("'a", HOLogic.termS), moreT);
wenzelm@4890
   483
    val fieldT_specs = map (mk_fieldT_spec o base) names;
wenzelm@4890
   484
wenzelm@5698
   485
    (*field constructors*)
wenzelm@4890
   486
    val field_decls = map (mk_fieldC moreT) fields;
wenzelm@4890
   487
wenzelm@4890
   488
    fun mk_field_spec (c, v) =
wenzelm@5698
   489
      mk_field ((c, v), more) :== mk_raw_field ((c, v), more);
wenzelm@4894
   490
    val field_specs = map mk_field_spec named_vars;
wenzelm@4890
   491
wenzelm@4890
   492
    (*field destructors*)
wenzelm@5698
   493
    val dest_decls = map (mk_fstC moreT) fields @ map (mk_sndC moreT) fields;
wenzelm@5698
   494
wenzelm@5698
   495
    fun mk_dest_spec dest f (c, T) =
wenzelm@5698
   496
      let val p = Free ("p", mk_fieldT ((c, T), moreT));
wenzelm@5698
   497
      in dest p :== mk_prod_case (suffix field_typeN c) (f T moreT) p end;
wenzelm@4890
   498
    val dest_specs =
wenzelm@5698
   499
      map (mk_dest_spec mk_fst fst_fn) fields @
wenzelm@5698
   500
      map (mk_dest_spec mk_snd snd_fn) fields;
wenzelm@4890
   501
wenzelm@4890
   502
wenzelm@4890
   503
    (* prepare theorems *)
wenzelm@4894
   504
wenzelm@5713
   505
    (*constructor injects*)
wenzelm@5713
   506
    fun mk_inject_prop (c, v) =
wenzelm@5713
   507
      HOLogic.mk_eq (mk_field ((c, v), more), mk_field ((c, prime v), prime more)) ===
wenzelm@5713
   508
        (HOLogic.conj $ HOLogic.mk_eq (v, prime v) $ HOLogic.mk_eq (more, prime more));
wenzelm@5713
   509
    val inject_props = map mk_inject_prop named_vars;
wenzelm@5713
   510
wenzelm@5698
   511
    (*destructor conversions*)
wenzelm@4890
   512
    fun mk_dest_prop dest dest' (c, v) =
wenzelm@4894
   513
      dest (mk_field ((c, v), more)) === dest' (v, more);
wenzelm@4890
   514
    val dest_props =
wenzelm@4895
   515
      map (mk_dest_prop mk_fst fst) named_vars @
wenzelm@4895
   516
      map (mk_dest_prop mk_snd snd) named_vars;
wenzelm@4890
   517
wenzelm@5698
   518
    (*surjective pairing*)
wenzelm@5698
   519
    fun mk_surj_prop (c, T) =
wenzelm@5698
   520
      let val p = Free ("p", mk_fieldT ((c, T), moreT));
wenzelm@5698
   521
      in p === mk_field ((c, mk_fst p), mk_snd p) end;
wenzelm@5698
   522
    val surj_props = map mk_surj_prop fields;
wenzelm@4890
   523
wenzelm@5698
   524
wenzelm@5698
   525
    (* 1st stage: types_thy *)
wenzelm@5698
   526
wenzelm@6092
   527
    val (types_thy, datatype_simps) =
wenzelm@5698
   528
      thy
wenzelm@5698
   529
      |> field_type_defs fieldT_specs;
wenzelm@5698
   530
wenzelm@5698
   531
wenzelm@5698
   532
    (* 2nd stage: defs_thy *)
wenzelm@4890
   533
wenzelm@4890
   534
    val defs_thy =
wenzelm@5698
   535
      types_thy
wenzelm@5698
   536
       |> (Theory.add_consts_i o map (Syntax.no_syn o apfst base))
wenzelm@5698
   537
         (field_decls @ dest_decls)
wenzelm@6092
   538
       |> (PureThy.add_defs_i o map (fn x => (x, [Drule.tag_internal])))
wenzelm@5698
   539
         (field_specs @ dest_specs);
wenzelm@4890
   540
wenzelm@4890
   541
    val field_defs = get_defs defs_thy field_specs;
wenzelm@4890
   542
    val dest_defs = get_defs defs_thy dest_specs;
wenzelm@4890
   543
wenzelm@4890
   544
wenzelm@5698
   545
    (* 3rd stage: thms_thy *)
wenzelm@5698
   546
wenzelm@5698
   547
    val prove = prove_simp defs_thy;
wenzelm@5713
   548
    val prove_std = prove [] (field_defs @ dest_defs @ datatype_simps);
wenzelm@4890
   549
wenzelm@5713
   550
    val field_injects = map prove_std inject_props;
wenzelm@5713
   551
    val dest_convs = map prove_std dest_props;
wenzelm@5698
   552
    val surj_pairs = map (prove [DatatypePackage.induct_tac "p" 1]
wenzelm@6092
   553
      (map Thm.symmetric field_defs @ dest_convs)) surj_props;
wenzelm@5698
   554
wenzelm@5707
   555
    fun mk_split th = SplitPairedAll.rule (th RS eq_reflection);
wenzelm@6092
   556
    val field_splits = map mk_split surj_pairs;
wenzelm@4894
   557
wenzelm@4890
   558
    val thms_thy =
wenzelm@4890
   559
      defs_thy
wenzelm@6092
   560
      |> (PureThy.add_thmss o map Thm.no_attributes)
wenzelm@4890
   561
        [("field_defs", field_defs),
wenzelm@4890
   562
          ("dest_defs", dest_defs),
wenzelm@5698
   563
          ("dest_convs", dest_convs),
wenzelm@5698
   564
          ("surj_pairs", surj_pairs),
wenzelm@5713
   565
          ("field_splits", field_splits)];
wenzelm@4890
   566
wenzelm@5713
   567
  in (thms_thy, dest_convs, field_injects, field_splits) end;
wenzelm@4890
   568
wenzelm@4890
   569
wenzelm@4890
   570
(* record_definition *)
wenzelm@4867
   571
wenzelm@4867
   572
fun record_definition (args, bname) parent (parents: parent_info list) bfields thy =
wenzelm@4867
   573
  let
wenzelm@4867
   574
    val sign = Theory.sign_of thy;
wenzelm@4867
   575
    val full = Sign.full_name_path sign bname;
wenzelm@4890
   576
    val base = Sign.base_name;
wenzelm@4867
   577
wenzelm@4867
   578
wenzelm@4890
   579
    (* basic components *)
wenzelm@4867
   580
wenzelm@4867
   581
    val alphas = map fst args;
wenzelm@5197
   582
    val name = Sign.full_name sign bname;       (*not made part of record name space!*)
wenzelm@4890
   583
wenzelm@4867
   584
    val parent_fields = flat (map #fields parents);
wenzelm@4890
   585
    val parent_names = map fst parent_fields;
wenzelm@4890
   586
    val parent_types = map snd parent_fields;
wenzelm@4890
   587
    val parent_len = length parent_fields;
wenzelm@4890
   588
    val parent_xs = variantlist (map (base o fst) parent_fields, [moreN]);
wenzelm@4890
   589
    val parent_vars = ListPair.map Free (parent_xs, parent_types);
wenzelm@4894
   590
    val parent_named_vars = parent_names ~~ parent_vars;
wenzelm@4890
   591
wenzelm@4867
   592
    val fields = map (apfst full) bfields;
wenzelm@4890
   593
    val names = map fst fields;
wenzelm@4890
   594
    val types = map snd fields;
wenzelm@4890
   595
    val len = length fields;
wenzelm@4890
   596
    val xs = variantlist (map fst bfields, moreN :: parent_xs);
wenzelm@4890
   597
    val vars = ListPair.map Free (xs, types);
wenzelm@4894
   598
    val named_vars = names ~~ vars;
wenzelm@4867
   599
wenzelm@4867
   600
    val all_fields = parent_fields @ fields;
wenzelm@4890
   601
    val all_names = parent_names @ names;
wenzelm@4890
   602
    val all_types = parent_types @ types;
wenzelm@4890
   603
    val all_len = parent_len + len;
wenzelm@4890
   604
    val all_xs = parent_xs @ xs;
wenzelm@4890
   605
    val all_vars = parent_vars @ vars;
wenzelm@4894
   606
    val all_named_vars = parent_named_vars @ named_vars;
wenzelm@4867
   607
wenzelm@4867
   608
    val zeta = variant alphas "'z";
wenzelm@4867
   609
    val moreT = TFree (zeta, moreS);
wenzelm@4895
   610
    val more = Free (moreN, moreT);
wenzelm@5197
   611
    val full_moreN = full moreN;
wenzelm@5197
   612
    fun more_part t = mk_more t full_moreN;
wenzelm@5197
   613
    fun more_part_update t x = mk_more_update t (full_moreN, x);
wenzelm@4894
   614
wenzelm@4894
   615
    val parent_more = funpow parent_len mk_snd;
wenzelm@4894
   616
    val idxs = 0 upto (len - 1);
wenzelm@4867
   617
wenzelm@4867
   618
    val rec_schemeT = mk_recordT (all_fields, moreT);
wenzelm@4894
   619
    val rec_scheme = mk_record (all_named_vars, more);
wenzelm@4890
   620
    val r = Free ("r", rec_schemeT);
wenzelm@4894
   621
    val recT = mk_recordT (all_fields, HOLogic.unitT);
wenzelm@4867
   622
wenzelm@4867
   623
wenzelm@4890
   624
    (* prepare print translation functions *)
wenzelm@4867
   625
wenzelm@5698
   626
    val field_tr's =
wenzelm@5698
   627
      print_translation (distinct (flat (map NameSpace.accesses (full_moreN :: names))));
wenzelm@4867
   628
wenzelm@4867
   629
wenzelm@4867
   630
    (* prepare declarations *)
wenzelm@4867
   631
wenzelm@5197
   632
    val sel_decls = map (mk_selC rec_schemeT) bfields @
wenzelm@5197
   633
      [mk_moreC rec_schemeT (moreN, moreT)];
wenzelm@5197
   634
    val update_decls = map (mk_updateC rec_schemeT) bfields @
wenzelm@5197
   635
      [mk_more_updateC rec_schemeT (moreN, moreT)];
wenzelm@4890
   636
    val make_decls =
wenzelm@4890
   637
      [(mk_makeC rec_schemeT (make_schemeN, all_types @ [moreT])),
wenzelm@4890
   638
       (mk_makeC recT (makeN, all_types))];
wenzelm@4867
   639
wenzelm@4867
   640
wenzelm@4867
   641
    (* prepare definitions *)
wenzelm@4867
   642
wenzelm@4895
   643
    (*record (scheme) type abbreviation*)
wenzelm@4890
   644
    val recordT_specs =
wenzelm@4890
   645
      [(suffix schemeN bname, alphas @ [zeta], rec_schemeT, Syntax.NoSyn),
wenzelm@4890
   646
        (bname, alphas, recT, Syntax.NoSyn)];
wenzelm@4867
   647
wenzelm@4894
   648
    (*selectors*)
wenzelm@4890
   649
    fun mk_sel_spec (i, c) =
wenzelm@4894
   650
      mk_sel r c :== mk_fst (funpow i mk_snd (parent_more r));
wenzelm@4894
   651
    val sel_specs =
wenzelm@4894
   652
      ListPair.map mk_sel_spec (idxs, names) @
wenzelm@4894
   653
        [more_part r :== funpow len mk_snd (parent_more r)];
wenzelm@4890
   654
wenzelm@4890
   655
    (*updates*)
wenzelm@4894
   656
    val all_sels = all_names ~~ map (mk_sel r) all_names;
wenzelm@4890
   657
    fun mk_upd_spec (i, (c, x)) =
wenzelm@4894
   658
      mk_update r (c, x) :==
wenzelm@4894
   659
        mk_record (nth_update (c, x) (parent_len + i, all_sels), more_part r)
wenzelm@5197
   660
    val update_specs =
wenzelm@5197
   661
      ListPair.map mk_upd_spec (idxs, named_vars) @
wenzelm@5197
   662
        [more_part_update r more :== mk_record (all_sels, more)];
wenzelm@4867
   663
wenzelm@4867
   664
    (*makes*)
wenzelm@4890
   665
    val make_scheme = Const (mk_makeC rec_schemeT (full make_schemeN, all_types @ [moreT]));
wenzelm@4890
   666
    val make = Const (mk_makeC recT (full makeN, all_types));
wenzelm@4867
   667
    val make_specs =
wenzelm@4894
   668
      [list_comb (make_scheme, all_vars) $ more :== rec_scheme,
wenzelm@4894
   669
        list_comb (make, all_vars) :== mk_record (all_named_vars, HOLogic.unit)];
wenzelm@4894
   670
wenzelm@4894
   671
wenzelm@4894
   672
    (* prepare propositions *)
wenzelm@4894
   673
wenzelm@4894
   674
    (*selectors*)
wenzelm@4894
   675
    val sel_props =
wenzelm@4894
   676
      map (fn (c, x) => mk_sel rec_scheme c === x) named_vars @
wenzelm@4894
   677
        [more_part rec_scheme === more];
wenzelm@4894
   678
wenzelm@4894
   679
    (*updates*)
wenzelm@4894
   680
    fun mk_upd_prop (i, (c, T)) =
wenzelm@4894
   681
      let val x' = Free (variant all_xs (base c ^ "'"), T) in
wenzelm@4894
   682
        mk_update rec_scheme (c, x') ===
wenzelm@4894
   683
          mk_record (nth_update (c, x') (parent_len + i, all_named_vars), more)
wenzelm@4894
   684
      end;
wenzelm@5197
   685
    val update_props =
wenzelm@5197
   686
      ListPair.map mk_upd_prop (idxs, fields) @
wenzelm@5197
   687
        let val more' = Free (variant all_xs (moreN ^ "'"), moreT)
wenzelm@5197
   688
        in [more_part_update rec_scheme more' === mk_record (all_named_vars, more')] end;
wenzelm@4867
   689
wenzelm@4867
   690
wenzelm@4890
   691
    (* 1st stage: fields_thy *)
wenzelm@4867
   692
wenzelm@5713
   693
    val (fields_thy, field_simps, field_injects, field_splits) =
wenzelm@4867
   694
      thy
wenzelm@4867
   695
      |> Theory.add_path bname
wenzelm@4894
   696
      |> field_definitions fields names zeta moreT more vars named_vars;
wenzelm@4867
   697
wenzelm@6092
   698
    val named_splits = map2 (fn (c, th) => (suffix field_typeN c, th)) (names, field_splits);
wenzelm@5698
   699
wenzelm@4867
   700
wenzelm@4890
   701
    (* 2nd stage: defs_thy *)
wenzelm@4890
   702
wenzelm@4890
   703
    val defs_thy =
wenzelm@4890
   704
      fields_thy
wenzelm@4890
   705
      |> Theory.parent_path
wenzelm@5197
   706
      |> Theory.add_tyabbrs_i recordT_specs     (*not made part of record name space!*)
wenzelm@4890
   707
      |> Theory.add_path bname
wenzelm@5197
   708
      |> Theory.add_trfuns ([], [], field_tr's, [])
wenzelm@4894
   709
      |> (Theory.add_consts_i o map Syntax.no_syn)
wenzelm@4894
   710
        (sel_decls @ update_decls @ make_decls)
wenzelm@6092
   711
      |> (PureThy.add_defs_i o map (fn x => (x, [Drule.tag_internal])))
wenzelm@5212
   712
        (sel_specs @ update_specs)
wenzelm@6092
   713
      |> (PureThy.add_defs_i o map Thm.no_attributes) make_specs;
wenzelm@4890
   714
wenzelm@4890
   715
    val sel_defs = get_defs defs_thy sel_specs;
wenzelm@4890
   716
    val update_defs = get_defs defs_thy update_specs;
wenzelm@4890
   717
    val make_defs = get_defs defs_thy make_specs;
wenzelm@4890
   718
wenzelm@4890
   719
wenzelm@4890
   720
    (* 3rd stage: thms_thy *)
wenzelm@4890
   721
wenzelm@4895
   722
    val parent_simps = flat (map #simps parents);
wenzelm@5698
   723
    val prove = prove_simp defs_thy [];
wenzelm@4890
   724
wenzelm@4895
   725
    val sel_convs = map (prove (parent_simps @ sel_defs @ field_simps)) sel_props;
wenzelm@4895
   726
    val update_convs = map (prove (parent_simps @ update_defs @ sel_convs)) update_props;
wenzelm@4894
   727
wenzelm@4894
   728
    val simps = field_simps @ sel_convs @ update_convs @ make_defs;
wenzelm@6519
   729
    val iffs = field_injects;
wenzelm@4867
   730
wenzelm@4867
   731
    val thms_thy =
wenzelm@4867
   732
      defs_thy
wenzelm@6092
   733
      |> (PureThy.add_thmss o map Thm.no_attributes)
wenzelm@4895
   734
        [("select_defs", sel_defs),
wenzelm@4890
   735
          ("update_defs", update_defs),
wenzelm@4894
   736
          ("make_defs", make_defs),
wenzelm@4895
   737
          ("select_convs", sel_convs),
wenzelm@4894
   738
          ("update_convs", update_convs)]
wenzelm@6092
   739
      |> PureThy.add_thmss
wenzelm@5707
   740
        [(("simps", simps), [Simplifier.simp_add_global]),
wenzelm@6519
   741
         (("iffs", iffs), [iff_add_global])];
wenzelm@4867
   742
wenzelm@4867
   743
wenzelm@4890
   744
    (* 4th stage: final_thy *)
wenzelm@4867
   745
wenzelm@4867
   746
    val final_thy =
wenzelm@4867
   747
      thms_thy
wenzelm@4895
   748
      |> put_record name {args = args, parent = parent, fields = fields, simps = simps}
wenzelm@5713
   749
      |> add_record_splits named_splits
wenzelm@4867
   750
      |> Theory.parent_path;
wenzelm@4867
   751
wenzelm@6519
   752
  in (final_thy, {simps = simps, iffs = iffs}) end;
wenzelm@4867
   753
wenzelm@4867
   754
wenzelm@4867
   755
wenzelm@4867
   756
(** theory extender interface **)
wenzelm@4867
   757
wenzelm@4867
   758
(* prepare arguments *)
wenzelm@4867
   759
wenzelm@4894
   760
(*note: read_raw_typ avoids expanding type abbreviations*)
wenzelm@4867
   761
fun read_raw_parent sign s =
wenzelm@4867
   762
  (case Sign.read_raw_typ (sign, K None) s handle TYPE (msg, _, _) => error msg of
wenzelm@4867
   763
    Type (name, Ts) => (Ts, name)
wenzelm@4867
   764
  | _ => error ("Bad parent record specification: " ^ quote s));
wenzelm@4867
   765
wenzelm@4867
   766
fun read_typ sign (env, s) =
wenzelm@4867
   767
  let
wenzelm@5060
   768
    fun def_sort (x, ~1) = assoc (env, x)
wenzelm@5060
   769
      | def_sort _ = None;
wenzelm@5060
   770
    val T = Type.no_tvars (Sign.read_typ (sign, def_sort) s) handle TYPE (msg, _, _) => error msg;
wenzelm@4867
   771
  in (Term.add_typ_tfrees (T, env), T) end;
wenzelm@4867
   772
wenzelm@4867
   773
fun cert_typ sign (env, raw_T) =
wenzelm@4867
   774
  let val T = Type.no_tvars (Sign.certify_typ sign raw_T) handle TYPE (msg, _, _) => error msg
wenzelm@4867
   775
  in (Term.add_typ_tfrees (T, env), T) end;
wenzelm@4867
   776
wenzelm@4867
   777
wenzelm@4867
   778
(* add_record *)
wenzelm@4867
   779
wenzelm@4895
   780
(*we do all preparations and error checks here, deferring the real
wenzelm@4895
   781
  work to record_definition*)
wenzelm@4890
   782
wenzelm@4867
   783
fun gen_add_record prep_typ prep_raw_parent (params, bname) raw_parent raw_fields thy =
wenzelm@4867
   784
  let
paulson@4970
   785
    val _ = Theory.requires thy "Record" "record definitions";
wenzelm@4867
   786
    val sign = Theory.sign_of thy;
wenzelm@5698
   787
    val _ = message ("Defining record " ^ quote bname ^ " ...");
wenzelm@4867
   788
wenzelm@4867
   789
wenzelm@4867
   790
    (* parents *)
wenzelm@4867
   791
wenzelm@4867
   792
    fun prep_inst T = snd (cert_typ sign ([], T));
wenzelm@4867
   793
wenzelm@4867
   794
    val parent = apsome (apfst (map prep_inst) o prep_raw_parent sign) raw_parent
wenzelm@4867
   795
      handle ERROR => error ("The error(s) above in parent record specification");
wenzelm@4867
   796
    val parents = add_parents thy (parent, []);
wenzelm@4867
   797
wenzelm@4867
   798
    val init_env =
wenzelm@4867
   799
      (case parent of
wenzelm@4867
   800
        None => []
wenzelm@4867
   801
      | Some (types, _) => foldr Term.add_typ_tfrees (types, []));
wenzelm@4867
   802
wenzelm@4867
   803
wenzelm@4867
   804
    (* fields *)
wenzelm@4867
   805
wenzelm@4967
   806
    fun prep_field (env, (c, raw_T)) =
wenzelm@4967
   807
      let val (env', T) = prep_typ sign (env, raw_T) handle ERROR =>
wenzelm@4967
   808
        error ("The error(s) above occured in field " ^ quote c)
wenzelm@4967
   809
      in (env', (c, T)) end;
wenzelm@4867
   810
wenzelm@4967
   811
    val (envir, bfields) = foldl_map prep_field (init_env, raw_fields);
wenzelm@4867
   812
    val envir_names = map fst envir;
wenzelm@4867
   813
wenzelm@4867
   814
wenzelm@4867
   815
    (* args *)
wenzelm@4867
   816
wenzelm@4867
   817
    val defaultS = Sign.defaultS sign;
wenzelm@4867
   818
    val args = map (fn x => (x, if_none (assoc (envir, x)) defaultS)) params;
wenzelm@4867
   819
wenzelm@4867
   820
wenzelm@4867
   821
    (* errors *)
wenzelm@4867
   822
wenzelm@4890
   823
    val name = Sign.full_name sign bname;
wenzelm@4890
   824
    val err_dup_record =
wenzelm@4890
   825
      if is_none (get_record thy name) then []
wenzelm@4890
   826
      else ["Duplicate definition of record " ^ quote name];
wenzelm@4890
   827
wenzelm@4867
   828
    val err_dup_parms =
wenzelm@4867
   829
      (case duplicates params of
wenzelm@4867
   830
        [] => []
wenzelm@4890
   831
      | dups => ["Duplicate parameter(s) " ^ commas dups]);
wenzelm@4867
   832
wenzelm@4867
   833
    val err_extra_frees =
wenzelm@4867
   834
      (case gen_rems (op =) (envir_names, params) of
wenzelm@4867
   835
        [] => []
wenzelm@4890
   836
      | extras => ["Extra free type variable(s) " ^ commas extras]);
wenzelm@4867
   837
wenzelm@4890
   838
    val err_no_fields = if null bfields then ["No fields present"] else [];
wenzelm@4867
   839
wenzelm@4867
   840
    val err_dup_fields =
wenzelm@4867
   841
      (case duplicates (map fst bfields) of
wenzelm@4867
   842
        [] => []
wenzelm@4890
   843
      | dups => ["Duplicate field(s) " ^ commas_quote dups]);
wenzelm@4890
   844
wenzelm@4890
   845
    val err_bad_fields =
wenzelm@4890
   846
      if forall (not_equal moreN o fst) bfields then []
wenzelm@4890
   847
      else ["Illegal field name " ^ quote moreN];
wenzelm@4867
   848
wenzelm@4867
   849
    val err_dup_sorts =
wenzelm@4867
   850
      (case duplicates envir_names of
wenzelm@4867
   851
        [] => []
wenzelm@4867
   852
      | dups => ["Inconsistent sort constraints for " ^ commas dups]);
wenzelm@4867
   853
wenzelm@4867
   854
    val errs =
wenzelm@4890
   855
      err_dup_record @ err_dup_parms @ err_extra_frees @ err_no_fields @
wenzelm@4890
   856
      err_dup_fields @ err_bad_fields @ err_dup_sorts;
wenzelm@4867
   857
  in
wenzelm@4890
   858
    if null errs then () else error (cat_lines errs);
wenzelm@4867
   859
    thy |> record_definition (args, bname) parent parents bfields
wenzelm@4867
   860
  end
wenzelm@4867
   861
  handle ERROR => error ("Failed to define record " ^ quote bname);
wenzelm@4867
   862
wenzelm@4867
   863
val add_record = gen_add_record read_typ read_raw_parent;
wenzelm@4867
   864
val add_record_i = gen_add_record cert_typ (K I);
wenzelm@4867
   865
wenzelm@4867
   866
wenzelm@4867
   867
wenzelm@6358
   868
(** package setup **)
wenzelm@6358
   869
wenzelm@6358
   870
(* setup theory *)
wenzelm@4867
   871
wenzelm@4867
   872
val setup =
wenzelm@5006
   873
 [RecordsData.init,
wenzelm@5698
   874
  Theory.add_trfuns ([], parse_translation, [], []),
wenzelm@6358
   875
  Method.add_methods [record_split_method],
wenzelm@5698
   876
  add_wrapper record_split_wrapper];
wenzelm@4867
   877
wenzelm@4867
   878
wenzelm@6358
   879
(* outer syntax *)
wenzelm@6358
   880
wenzelm@6384
   881
local open OuterParse in
wenzelm@6358
   882
wenzelm@6358
   883
val record_decl =
wenzelm@6358
   884
  type_args -- name -- ($$$ "=" |-- Scan.option (typ --| $$$ "+")
wenzelm@6358
   885
    -- Scan.repeat1 (name -- ($$$ "::" |-- typ)));
wenzelm@6358
   886
wenzelm@6358
   887
val recordP =
wenzelm@6384
   888
  OuterSyntax.command "record" "define extensible record"
wenzelm@6519
   889
    (record_decl >> (fn (x, (y, z)) => Toplevel.theory (#1 o add_record x y z)));
wenzelm@6358
   890
wenzelm@6358
   891
val _ = OuterSyntax.add_parsers [recordP];
wenzelm@6358
   892
wenzelm@4867
   893
end;
wenzelm@5698
   894
wenzelm@5698
   895
wenzelm@6384
   896
end;
wenzelm@6384
   897
wenzelm@5698
   898
structure BasicRecordPackage: BASIC_RECORD_PACKAGE = RecordPackage;
wenzelm@5698
   899
open BasicRecordPackage;