author | wenzelm |
Fri, 30 Apr 1999 18:10:03 +0200 | |
changeset 6556 | daa00919502b |
parent 6519 | 5bd1c469e742 |
child 6723 | f342449d73ca |
permissions | -rw-r--r-- |
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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); |
|
226 |
||
227 |
||
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228 |
|
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229 |
(** concrete syntax for records **) |
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230 |
|
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231 |
(* parse translations *) |
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232 |
|
5197 | 233 |
fun gen_field_tr mark sfx (t as Const (c, _) $ Free (name, _) $ arg) = |
234 |
if c = mark then Syntax.const (suffix sfx name) $ arg |
|
235 |
else raise TERM ("gen_field_tr: " ^ mark, [t]) |
|
236 |
| gen_field_tr mark _ t = raise TERM ("gen_field_tr: " ^ mark, [t]); |
|
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237 |
|
5197 | 238 |
fun gen_fields_tr sep mark sfx (tm as Const (c, _) $ t $ u) = |
239 |
if c = sep then gen_field_tr mark sfx t :: gen_fields_tr sep mark sfx u |
|
5201 | 240 |
else [gen_field_tr mark sfx tm] |
241 |
| gen_fields_tr _ mark sfx tm = [gen_field_tr mark sfx tm]; |
|
5197 | 242 |
|
243 |
fun gen_record_tr sep mark sfx unit [t] = foldr (op $) (gen_fields_tr sep mark sfx t, unit) |
|
5201 | 244 |
| gen_record_tr _ _ _ _ ts = raise TERM ("gen_record_tr", ts); |
5197 | 245 |
|
246 |
fun gen_record_scheme_tr sep mark sfx [t, more] = foldr (op $) (gen_fields_tr sep mark sfx t, more) |
|
5201 | 247 |
| gen_record_scheme_tr _ _ _ ts = raise TERM ("gen_record_scheme_tr", ts); |
5197 | 248 |
|
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249 |
|
5197 | 250 |
val record_type_tr = gen_record_tr "_field_types" "_field_type" field_typeN (Syntax.const "unit"); |
251 |
val record_type_scheme_tr = gen_record_scheme_tr "_field_types" "_field_type" field_typeN; |
|
252 |
||
253 |
val record_tr = gen_record_tr "_fields" "_field" fieldN HOLogic.unit; |
|
254 |
val record_scheme_tr = gen_record_scheme_tr "_fields" "_field" fieldN; |
|
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255 |
|
5197 | 256 |
fun record_update_tr [t, u] = |
257 |
foldr (op $) (rev (gen_fields_tr "_updates" "_update" updateN u), t) |
|
258 |
| record_update_tr ts = raise TERM ("record_update_tr", ts); |
|
259 |
||
260 |
||
261 |
val parse_translation = |
|
262 |
[("_record_type", record_type_tr), |
|
263 |
("_record_type_scheme", record_type_scheme_tr), |
|
264 |
("_record", record_tr), |
|
265 |
("_record_scheme", record_scheme_tr), |
|
266 |
("_record_update", record_update_tr)]; |
|
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267 |
|
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268 |
|
4890 | 269 |
(* print translations *) |
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270 |
|
5197 | 271 |
fun gen_fields_tr' mark sfx (tm as Const (name_field, _) $ t $ u) = |
272 |
(case try (unsuffix sfx) name_field of |
|
273 |
Some name => |
|
274 |
apfst (cons (Syntax.const mark $ Syntax.free name $ t)) (gen_fields_tr' mark sfx u) |
|
275 |
| None => ([], tm)) |
|
276 |
| gen_fields_tr' _ _ tm = ([], tm); |
|
277 |
||
278 |
fun gen_record_tr' sep mark sfx is_unit record record_scheme tm = |
|
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279 |
let |
5197 | 280 |
val (ts, u) = gen_fields_tr' mark sfx tm; |
281 |
val t' = foldr1 (fn (v, w) => Syntax.const sep $ v $ w) ts; |
|
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282 |
in |
5197 | 283 |
if is_unit u then Syntax.const record $ t' |
284 |
else Syntax.const record_scheme $ t' $ u |
|
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285 |
end; |
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286 |
|
5197 | 287 |
|
288 |
val record_type_tr' = |
|
289 |
gen_record_tr' "_field_types" "_field_type" field_typeN |
|
290 |
(fn Const ("unit", _) => true | _ => false) "_record_type" "_record_type_scheme"; |
|
291 |
||
292 |
val record_tr' = |
|
293 |
gen_record_tr' "_fields" "_field" fieldN HOLogic.is_unit "_record" "_record_scheme"; |
|
294 |
||
295 |
fun record_update_tr' tm = |
|
296 |
let val (ts, u) = gen_fields_tr' "_update" updateN tm in |
|
297 |
Syntax.const "_record_update" $ u $ |
|
298 |
foldr1 (fn (v, w) => Syntax.const "_updates" $ v $ w) (rev ts) |
|
299 |
end; |
|
300 |
||
301 |
||
5201 | 302 |
fun gen_field_tr' sfx tr' name = |
303 |
let val name_sfx = suffix sfx name |
|
304 |
in (name_sfx, fn [t, u] => tr' (Syntax.const name_sfx $ t $ u) | _ => raise Match) end; |
|
305 |
||
5197 | 306 |
fun print_translation names = |
307 |
map (gen_field_tr' field_typeN record_type_tr') names @ |
|
308 |
map (gen_field_tr' fieldN record_tr') names @ |
|
309 |
map (gen_field_tr' updateN record_update_tr') names; |
|
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310 |
|
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311 |
|
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312 |
|
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313 |
(*** extend theory by record definition ***) |
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314 |
|
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315 |
(** record info **) |
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316 |
|
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317 |
(* type record_info and parent_info *) |
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318 |
|
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319 |
type record_info = |
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320 |
{args: (string * sort) list, |
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321 |
parent: (typ list * string) option, |
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fields: (string * typ) list, |
6092 | 323 |
simps: thm list}; |
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324 |
|
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325 |
type parent_info = |
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|
326 |
{name: string, |
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327 |
fields: (string * typ) list, |
6092 | 328 |
simps: thm list}; |
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|
329 |
|
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|
330 |
|
5052 | 331 |
(* data kind 'HOL/records' *) |
5001 | 332 |
|
5006 | 333 |
structure RecordsArgs = |
334 |
struct |
|
335 |
val name = "HOL/records"; |
|
5698 | 336 |
type T = |
5707 | 337 |
record_info Symtab.table * (*records*) |
338 |
(thm Symtab.table * Simplifier.simpset); (*field split rules*) |
|
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|
339 |
|
5698 | 340 |
val empty = (Symtab.empty, (Symtab.empty, HOL_basic_ss)); |
6556 | 341 |
val copy = I; |
5006 | 342 |
val prep_ext = I; |
5698 | 343 |
fun merge ((recs1, (sps1, ss1)), (recs2, (sps2, ss2))) = |
344 |
(Symtab.merge (K true) (recs1, recs2), |
|
345 |
(Symtab.merge (K true) (sps1, sps2), Simplifier.merge_ss (ss1, ss2))); |
|
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|
346 |
|
5698 | 347 |
fun print sg (recs, _) = |
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|
348 |
let |
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|
349 |
val prt_typ = Sign.pretty_typ sg; |
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|
350 |
val ext_const = Sign.cond_extern sg Sign.constK; |
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|
351 |
|
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|
352 |
fun pretty_parent None = [] |
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|
353 |
| pretty_parent (Some (Ts, name)) = |
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|
354 |
[Pretty.block [prt_typ (Type (name, Ts)), Pretty.str " +"]]; |
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|
355 |
|
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|
356 |
fun pretty_field (c, T) = Pretty.block |
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|
357 |
[Pretty.str (ext_const c), Pretty.str " ::", Pretty.brk 1, Pretty.quote (prt_typ T)]; |
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|
358 |
|
4895 | 359 |
fun pretty_record (name, {args, parent, fields, simps = _}) = Pretty.block (Pretty.fbreaks |
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|
360 |
(Pretty.block [prt_typ (Type (name, map TFree args)), Pretty.str " = "] :: |
9be2bf0ce909
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|
361 |
pretty_parent parent @ map pretty_field fields)); |
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|
362 |
in |
5698 | 363 |
seq (Pretty.writeln o pretty_record) (Symtab.dest recs) |
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|
364 |
end; |
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|
365 |
end; |
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|
366 |
|
5006 | 367 |
structure RecordsData = TheoryDataFun(RecordsArgs); |
368 |
val print_records = RecordsData.print; |
|
369 |
||
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|
370 |
|
5698 | 371 |
(* get and put data *) |
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|
372 |
|
5698 | 373 |
fun get_record thy name = Symtab.lookup (#1 (RecordsData.get thy), name); |
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|
374 |
|
4890 | 375 |
fun put_record name info thy = |
5698 | 376 |
let val (tab, sp) = RecordsData.get thy |
377 |
in RecordsData.put (Symtab.update ((name, info), tab), sp) thy end; |
|
378 |
||
379 |
fun add_record_splits splits thy = |
|
380 |
let |
|
381 |
val (tab, (sps, ss)) = RecordsData.get thy; |
|
382 |
val simps = map #2 splits; |
|
383 |
in RecordsData.put (tab, (Symtab.extend (sps, splits), Simplifier.addsimps (ss, simps))) thy end; |
|
4867
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|
384 |
|
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|
385 |
|
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|
386 |
(* parent records *) |
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|
387 |
|
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|
388 |
fun inst_record thy (types, name) = |
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|
389 |
let |
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|
390 |
val sign = Theory.sign_of thy; |
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|
391 |
fun err msg = error (msg ^ " parent record " ^ quote name); |
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changeset
|
392 |
|
4895 | 393 |
val {args, parent, fields, simps} = |
4867
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|
394 |
(case get_record thy name of Some info => info | None => err "Unknown"); |
4895 | 395 |
val _ = if length types <> length args then err "Bad number of arguments for" else (); |
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|
396 |
|
9be2bf0ce909
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|
397 |
fun bad_inst ((x, S), T) = |
9be2bf0ce909
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diff
changeset
|
398 |
if Sign.of_sort sign (T, S) then None else Some x |
9be2bf0ce909
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diff
changeset
|
399 |
val bads = mapfilter bad_inst (args ~~ types); |
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changeset
|
400 |
|
9be2bf0ce909
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diff
changeset
|
401 |
val inst = map fst args ~~ types; |
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package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
402 |
val subst = Term.map_type_tfree (fn (x, _) => the (assoc (inst, x))); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
403 |
in |
4895 | 404 |
if not (null bads) then |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
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diff
changeset
|
405 |
err ("Ill-sorted instantiation of " ^ commas bads ^ " in") |
4895 | 406 |
else (apsome (apfst (map subst)) parent, map (apsnd subst) fields, simps) |
4867
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package extensible records with structural subtyping in HOL -- still
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diff
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|
407 |
end; |
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wenzelm
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diff
changeset
|
408 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
409 |
fun add_parents thy (None, parents) = parents |
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wenzelm
parents:
diff
changeset
|
410 |
| add_parents thy (Some (types, name), parents) = |
4895 | 411 |
let val (pparent, pfields, psimps) = inst_record thy (types, name) |
412 |
in add_parents thy (pparent, {name = name, fields = pfields, simps = psimps} :: parents) end; |
|
4867
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changeset
|
413 |
|
9be2bf0ce909
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changeset
|
414 |
|
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changeset
|
415 |
|
5698 | 416 |
(** record field splitting **) |
417 |
||
6358 | 418 |
(* tactic *) |
419 |
||
5698 | 420 |
fun record_split_tac i st = |
421 |
let |
|
422 |
val (_, (sps, ss)) = RecordsData.get_sg (Thm.sign_of_thm st); |
|
423 |
||
424 |
fun is_fieldT (_, Type (a, [_, _])) = is_some (Symtab.lookup (sps, a)) |
|
425 |
| is_fieldT _ = false; |
|
426 |
val params = Logic.strip_params (Library.nth_elem (i - 1, Thm.prems_of st)); |
|
427 |
in |
|
428 |
if exists is_fieldT params then Simplifier.full_simp_tac ss i st |
|
429 |
else Seq.empty |
|
430 |
end handle Library.LIST _ => Seq.empty; |
|
431 |
||
6358 | 432 |
|
433 |
(* wrapper *) |
|
434 |
||
5707 | 435 |
val record_split_name = "record_split_tac"; |
436 |
val record_split_wrapper = (record_split_name, fn tac => record_split_tac ORELSE' tac); |
|
5698 | 437 |
|
438 |
||
6358 | 439 |
(* method *) |
440 |
||
441 |
val record_split_method = |
|
442 |
("record_split", Method.no_args (Method.METHOD0 (FIRSTGOAL record_split_tac)), |
|
443 |
"split record fields"); |
|
444 |
||
445 |
||
5698 | 446 |
|
4890 | 447 |
(** internal theory extenders **) |
4867
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changeset
|
448 |
|
5698 | 449 |
(* field_type_defs *) |
450 |
||
5713 | 451 |
fun field_type_def ((thy, simps), (name, tname, vs, T, U)) = |
5698 | 452 |
let |
6394 | 453 |
val full = Sign.full_name (Theory.sign_of thy); |
5713 | 454 |
val (thy', {simps = simps', ...}) = |
5698 | 455 |
thy |
456 |
|> setmp DatatypePackage.quiet_mode true |
|
457 |
(DatatypePackage.add_datatype_i true [tname] |
|
458 |
[(vs, tname, Syntax.NoSyn, [(name, [T, U], Syntax.NoSyn)])]); |
|
459 |
val thy'' = |
|
460 |
thy' |
|
461 |
|> setmp AxClass.quiet_mode true |
|
462 |
(AxClass.add_inst_arity_i (full tname, [HOLogic.termS, moreS], moreS) [] [] None); |
|
5713 | 463 |
in (thy'', simps' @ simps) end; |
5698 | 464 |
|
5713 | 465 |
fun field_type_defs args thy = foldl field_type_def ((thy, []), args); |
5698 | 466 |
|
467 |
||
4894 | 468 |
(* field_definitions *) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
469 |
|
4894 | 470 |
fun field_definitions fields names zeta moreT more vars named_vars thy = |
4890 | 471 |
let |
5698 | 472 |
val sign = Theory.sign_of thy; |
4890 | 473 |
val base = Sign.base_name; |
5698 | 474 |
val full_path = Sign.full_name_path sign; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
475 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
476 |
|
4890 | 477 |
(* prepare declarations and definitions *) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
478 |
|
4890 | 479 |
(*field types*) |
480 |
fun mk_fieldT_spec c = |
|
5698 | 481 |
(suffix raw_fieldN c, suffix field_typeN c, |
482 |
["'a", zeta], TFree ("'a", HOLogic.termS), moreT); |
|
4890 | 483 |
val fieldT_specs = map (mk_fieldT_spec o base) names; |
484 |
||
5698 | 485 |
(*field constructors*) |
4890 | 486 |
val field_decls = map (mk_fieldC moreT) fields; |
487 |
||
488 |
fun mk_field_spec (c, v) = |
|
5698 | 489 |
mk_field ((c, v), more) :== mk_raw_field ((c, v), more); |
4894 | 490 |
val field_specs = map mk_field_spec named_vars; |
4890 | 491 |
|
492 |
(*field destructors*) |
|
5698 | 493 |
val dest_decls = map (mk_fstC moreT) fields @ map (mk_sndC moreT) fields; |
494 |
||
495 |
fun mk_dest_spec dest f (c, T) = |
|
496 |
let val p = Free ("p", mk_fieldT ((c, T), moreT)); |
|
497 |
in dest p :== mk_prod_case (suffix field_typeN c) (f T moreT) p end; |
|
4890 | 498 |
val dest_specs = |
5698 | 499 |
map (mk_dest_spec mk_fst fst_fn) fields @ |
500 |
map (mk_dest_spec mk_snd snd_fn) fields; |
|
4890 | 501 |
|
502 |
||
503 |
(* prepare theorems *) |
|
4894 | 504 |
|
5713 | 505 |
(*constructor injects*) |
506 |
fun mk_inject_prop (c, v) = |
|
507 |
HOLogic.mk_eq (mk_field ((c, v), more), mk_field ((c, prime v), prime more)) === |
|
508 |
(HOLogic.conj $ HOLogic.mk_eq (v, prime v) $ HOLogic.mk_eq (more, prime more)); |
|
509 |
val inject_props = map mk_inject_prop named_vars; |
|
510 |
||
5698 | 511 |
(*destructor conversions*) |
4890 | 512 |
fun mk_dest_prop dest dest' (c, v) = |
4894 | 513 |
dest (mk_field ((c, v), more)) === dest' (v, more); |
4890 | 514 |
val dest_props = |
4895 | 515 |
map (mk_dest_prop mk_fst fst) named_vars @ |
516 |
map (mk_dest_prop mk_snd snd) named_vars; |
|
4890 | 517 |
|
5698 | 518 |
(*surjective pairing*) |
519 |
fun mk_surj_prop (c, T) = |
|
520 |
let val p = Free ("p", mk_fieldT ((c, T), moreT)); |
|
521 |
in p === mk_field ((c, mk_fst p), mk_snd p) end; |
|
522 |
val surj_props = map mk_surj_prop fields; |
|
4890 | 523 |
|
5698 | 524 |
|
525 |
(* 1st stage: types_thy *) |
|
526 |
||
6092 | 527 |
val (types_thy, datatype_simps) = |
5698 | 528 |
thy |
529 |
|> field_type_defs fieldT_specs; |
|
530 |
||
531 |
||
532 |
(* 2nd stage: defs_thy *) |
|
4890 | 533 |
|
534 |
val defs_thy = |
|
5698 | 535 |
types_thy |
536 |
|> (Theory.add_consts_i o map (Syntax.no_syn o apfst base)) |
|
537 |
(field_decls @ dest_decls) |
|
6092 | 538 |
|> (PureThy.add_defs_i o map (fn x => (x, [Drule.tag_internal]))) |
5698 | 539 |
(field_specs @ dest_specs); |
4890 | 540 |
|
541 |
val field_defs = get_defs defs_thy field_specs; |
|
542 |
val dest_defs = get_defs defs_thy dest_specs; |
|
543 |
||
544 |
||
5698 | 545 |
(* 3rd stage: thms_thy *) |
546 |
||
547 |
val prove = prove_simp defs_thy; |
|
5713 | 548 |
val prove_std = prove [] (field_defs @ dest_defs @ datatype_simps); |
4890 | 549 |
|
5713 | 550 |
val field_injects = map prove_std inject_props; |
551 |
val dest_convs = map prove_std dest_props; |
|
5698 | 552 |
val surj_pairs = map (prove [DatatypePackage.induct_tac "p" 1] |
6092 | 553 |
(map Thm.symmetric field_defs @ dest_convs)) surj_props; |
5698 | 554 |
|
5707 | 555 |
fun mk_split th = SplitPairedAll.rule (th RS eq_reflection); |
6092 | 556 |
val field_splits = map mk_split surj_pairs; |
4894 | 557 |
|
4890 | 558 |
val thms_thy = |
559 |
defs_thy |
|
6092 | 560 |
|> (PureThy.add_thmss o map Thm.no_attributes) |
4890 | 561 |
[("field_defs", field_defs), |
562 |
("dest_defs", dest_defs), |
|
5698 | 563 |
("dest_convs", dest_convs), |
564 |
("surj_pairs", surj_pairs), |
|
5713 | 565 |
("field_splits", field_splits)]; |
4890 | 566 |
|
5713 | 567 |
in (thms_thy, dest_convs, field_injects, field_splits) end; |
4890 | 568 |
|
569 |
||
570 |
(* record_definition *) |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
571 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
572 |
fun record_definition (args, bname) parent (parents: parent_info list) bfields thy = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
573 |
let |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
574 |
val sign = Theory.sign_of thy; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
575 |
val full = Sign.full_name_path sign bname; |
4890 | 576 |
val base = Sign.base_name; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
577 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
578 |
|
4890 | 579 |
(* basic components *) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
580 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
581 |
val alphas = map fst args; |
5197 | 582 |
val name = Sign.full_name sign bname; (*not made part of record name space!*) |
4890 | 583 |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
584 |
val parent_fields = flat (map #fields parents); |
4890 | 585 |
val parent_names = map fst parent_fields; |
586 |
val parent_types = map snd parent_fields; |
|
587 |
val parent_len = length parent_fields; |
|
588 |
val parent_xs = variantlist (map (base o fst) parent_fields, [moreN]); |
|
589 |
val parent_vars = ListPair.map Free (parent_xs, parent_types); |
|
4894 | 590 |
val parent_named_vars = parent_names ~~ parent_vars; |
4890 | 591 |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
592 |
val fields = map (apfst full) bfields; |
4890 | 593 |
val names = map fst fields; |
594 |
val types = map snd fields; |
|
595 |
val len = length fields; |
|
596 |
val xs = variantlist (map fst bfields, moreN :: parent_xs); |
|
597 |
val vars = ListPair.map Free (xs, types); |
|
4894 | 598 |
val named_vars = names ~~ vars; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
599 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
600 |
val all_fields = parent_fields @ fields; |
4890 | 601 |
val all_names = parent_names @ names; |
602 |
val all_types = parent_types @ types; |
|
603 |
val all_len = parent_len + len; |
|
604 |
val all_xs = parent_xs @ xs; |
|
605 |
val all_vars = parent_vars @ vars; |
|
4894 | 606 |
val all_named_vars = parent_named_vars @ named_vars; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
607 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
608 |
val zeta = variant alphas "'z"; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
609 |
val moreT = TFree (zeta, moreS); |
4895 | 610 |
val more = Free (moreN, moreT); |
5197 | 611 |
val full_moreN = full moreN; |
612 |
fun more_part t = mk_more t full_moreN; |
|
613 |
fun more_part_update t x = mk_more_update t (full_moreN, x); |
|
4894 | 614 |
|
615 |
val parent_more = funpow parent_len mk_snd; |
|
616 |
val idxs = 0 upto (len - 1); |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
617 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
618 |
val rec_schemeT = mk_recordT (all_fields, moreT); |
4894 | 619 |
val rec_scheme = mk_record (all_named_vars, more); |
4890 | 620 |
val r = Free ("r", rec_schemeT); |
4894 | 621 |
val recT = mk_recordT (all_fields, HOLogic.unitT); |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
622 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
623 |
|
4890 | 624 |
(* prepare print translation functions *) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
625 |
|
5698 | 626 |
val field_tr's = |
627 |
print_translation (distinct (flat (map NameSpace.accesses (full_moreN :: names)))); |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
628 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
629 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
630 |
(* prepare declarations *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
631 |
|
5197 | 632 |
val sel_decls = map (mk_selC rec_schemeT) bfields @ |
633 |
[mk_moreC rec_schemeT (moreN, moreT)]; |
|
634 |
val update_decls = map (mk_updateC rec_schemeT) bfields @ |
|
635 |
[mk_more_updateC rec_schemeT (moreN, moreT)]; |
|
4890 | 636 |
val make_decls = |
637 |
[(mk_makeC rec_schemeT (make_schemeN, all_types @ [moreT])), |
|
638 |
(mk_makeC recT (makeN, all_types))]; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
639 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
640 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
641 |
(* prepare definitions *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
642 |
|
4895 | 643 |
(*record (scheme) type abbreviation*) |
4890 | 644 |
val recordT_specs = |
645 |
[(suffix schemeN bname, alphas @ [zeta], rec_schemeT, Syntax.NoSyn), |
|
646 |
(bname, alphas, recT, Syntax.NoSyn)]; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
647 |
|
4894 | 648 |
(*selectors*) |
4890 | 649 |
fun mk_sel_spec (i, c) = |
4894 | 650 |
mk_sel r c :== mk_fst (funpow i mk_snd (parent_more r)); |
651 |
val sel_specs = |
|
652 |
ListPair.map mk_sel_spec (idxs, names) @ |
|
653 |
[more_part r :== funpow len mk_snd (parent_more r)]; |
|
4890 | 654 |
|
655 |
(*updates*) |
|
4894 | 656 |
val all_sels = all_names ~~ map (mk_sel r) all_names; |
4890 | 657 |
fun mk_upd_spec (i, (c, x)) = |
4894 | 658 |
mk_update r (c, x) :== |
659 |
mk_record (nth_update (c, x) (parent_len + i, all_sels), more_part r) |
|
5197 | 660 |
val update_specs = |
661 |
ListPair.map mk_upd_spec (idxs, named_vars) @ |
|
662 |
[more_part_update r more :== mk_record (all_sels, more)]; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
663 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
664 |
(*makes*) |
4890 | 665 |
val make_scheme = Const (mk_makeC rec_schemeT (full make_schemeN, all_types @ [moreT])); |
666 |
val make = Const (mk_makeC recT (full makeN, all_types)); |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
667 |
val make_specs = |
4894 | 668 |
[list_comb (make_scheme, all_vars) $ more :== rec_scheme, |
669 |
list_comb (make, all_vars) :== mk_record (all_named_vars, HOLogic.unit)]; |
|
670 |
||
671 |
||
672 |
(* prepare propositions *) |
|
673 |
||
674 |
(*selectors*) |
|
675 |
val sel_props = |
|
676 |
map (fn (c, x) => mk_sel rec_scheme c === x) named_vars @ |
|
677 |
[more_part rec_scheme === more]; |
|
678 |
||
679 |
(*updates*) |
|
680 |
fun mk_upd_prop (i, (c, T)) = |
|
681 |
let val x' = Free (variant all_xs (base c ^ "'"), T) in |
|
682 |
mk_update rec_scheme (c, x') === |
|
683 |
mk_record (nth_update (c, x') (parent_len + i, all_named_vars), more) |
|
684 |
end; |
|
5197 | 685 |
val update_props = |
686 |
ListPair.map mk_upd_prop (idxs, fields) @ |
|
687 |
let val more' = Free (variant all_xs (moreN ^ "'"), moreT) |
|
688 |
in [more_part_update rec_scheme more' === mk_record (all_named_vars, more')] end; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
689 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
690 |
|
4890 | 691 |
(* 1st stage: fields_thy *) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
692 |
|
5713 | 693 |
val (fields_thy, field_simps, field_injects, field_splits) = |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
694 |
thy |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
695 |
|> Theory.add_path bname |
4894 | 696 |
|> field_definitions fields names zeta moreT more vars named_vars; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
697 |
|
6092 | 698 |
val named_splits = map2 (fn (c, th) => (suffix field_typeN c, th)) (names, field_splits); |
5698 | 699 |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
700 |
|
4890 | 701 |
(* 2nd stage: defs_thy *) |
702 |
||
703 |
val defs_thy = |
|
704 |
fields_thy |
|
705 |
|> Theory.parent_path |
|
5197 | 706 |
|> Theory.add_tyabbrs_i recordT_specs (*not made part of record name space!*) |
4890 | 707 |
|> Theory.add_path bname |
5197 | 708 |
|> Theory.add_trfuns ([], [], field_tr's, []) |
4894 | 709 |
|> (Theory.add_consts_i o map Syntax.no_syn) |
710 |
(sel_decls @ update_decls @ make_decls) |
|
6092 | 711 |
|> (PureThy.add_defs_i o map (fn x => (x, [Drule.tag_internal]))) |
5212 | 712 |
(sel_specs @ update_specs) |
6092 | 713 |
|> (PureThy.add_defs_i o map Thm.no_attributes) make_specs; |
4890 | 714 |
|
715 |
val sel_defs = get_defs defs_thy sel_specs; |
|
716 |
val update_defs = get_defs defs_thy update_specs; |
|
717 |
val make_defs = get_defs defs_thy make_specs; |
|
718 |
||
719 |
||
720 |
(* 3rd stage: thms_thy *) |
|
721 |
||
4895 | 722 |
val parent_simps = flat (map #simps parents); |
5698 | 723 |
val prove = prove_simp defs_thy []; |
4890 | 724 |
|
4895 | 725 |
val sel_convs = map (prove (parent_simps @ sel_defs @ field_simps)) sel_props; |
726 |
val update_convs = map (prove (parent_simps @ update_defs @ sel_convs)) update_props; |
|
4894 | 727 |
|
728 |
val simps = field_simps @ sel_convs @ update_convs @ make_defs; |
|
6519 | 729 |
val iffs = field_injects; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
730 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
731 |
val thms_thy = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
732 |
defs_thy |
6092 | 733 |
|> (PureThy.add_thmss o map Thm.no_attributes) |
4895 | 734 |
[("select_defs", sel_defs), |
4890 | 735 |
("update_defs", update_defs), |
4894 | 736 |
("make_defs", make_defs), |
4895 | 737 |
("select_convs", sel_convs), |
4894 | 738 |
("update_convs", update_convs)] |
6092 | 739 |
|> PureThy.add_thmss |
5707 | 740 |
[(("simps", simps), [Simplifier.simp_add_global]), |
6519 | 741 |
(("iffs", iffs), [iff_add_global])]; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
742 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
743 |
|
4890 | 744 |
(* 4th stage: final_thy *) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
745 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
746 |
val final_thy = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
747 |
thms_thy |
4895 | 748 |
|> put_record name {args = args, parent = parent, fields = fields, simps = simps} |
5713 | 749 |
|> add_record_splits named_splits |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
750 |
|> Theory.parent_path; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
751 |
|
6519 | 752 |
in (final_thy, {simps = simps, iffs = iffs}) end; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
753 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
754 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
755 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
756 |
(** theory extender interface **) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
757 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
758 |
(* prepare arguments *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
759 |
|
4894 | 760 |
(*note: read_raw_typ avoids expanding type abbreviations*) |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
761 |
fun read_raw_parent sign s = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
762 |
(case Sign.read_raw_typ (sign, K None) s handle TYPE (msg, _, _) => error msg of |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
763 |
Type (name, Ts) => (Ts, name) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
764 |
| _ => error ("Bad parent record specification: " ^ quote s)); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
765 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
766 |
fun read_typ sign (env, s) = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
767 |
let |
5060 | 768 |
fun def_sort (x, ~1) = assoc (env, x) |
769 |
| def_sort _ = None; |
|
770 |
val T = Type.no_tvars (Sign.read_typ (sign, def_sort) s) handle TYPE (msg, _, _) => error msg; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
771 |
in (Term.add_typ_tfrees (T, env), T) end; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
772 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
773 |
fun cert_typ sign (env, raw_T) = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
774 |
let val T = Type.no_tvars (Sign.certify_typ sign raw_T) handle TYPE (msg, _, _) => error msg |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
775 |
in (Term.add_typ_tfrees (T, env), T) end; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
776 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
777 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
778 |
(* add_record *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
779 |
|
4895 | 780 |
(*we do all preparations and error checks here, deferring the real |
781 |
work to record_definition*) |
|
4890 | 782 |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
783 |
fun gen_add_record prep_typ prep_raw_parent (params, bname) raw_parent raw_fields thy = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
784 |
let |
4970 | 785 |
val _ = Theory.requires thy "Record" "record definitions"; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
786 |
val sign = Theory.sign_of thy; |
5698 | 787 |
val _ = message ("Defining record " ^ quote bname ^ " ..."); |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
788 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
789 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
790 |
(* parents *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
791 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
792 |
fun prep_inst T = snd (cert_typ sign ([], T)); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
793 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
794 |
val parent = apsome (apfst (map prep_inst) o prep_raw_parent sign) raw_parent |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
795 |
handle ERROR => error ("The error(s) above in parent record specification"); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
796 |
val parents = add_parents thy (parent, []); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
797 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
798 |
val init_env = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
799 |
(case parent of |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
800 |
None => [] |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
801 |
| Some (types, _) => foldr Term.add_typ_tfrees (types, [])); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
802 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
803 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
804 |
(* fields *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
805 |
|
4967 | 806 |
fun prep_field (env, (c, raw_T)) = |
807 |
let val (env', T) = prep_typ sign (env, raw_T) handle ERROR => |
|
808 |
error ("The error(s) above occured in field " ^ quote c) |
|
809 |
in (env', (c, T)) end; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
810 |
|
4967 | 811 |
val (envir, bfields) = foldl_map prep_field (init_env, raw_fields); |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
812 |
val envir_names = map fst envir; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
813 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
814 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
815 |
(* args *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
816 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
817 |
val defaultS = Sign.defaultS sign; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
818 |
val args = map (fn x => (x, if_none (assoc (envir, x)) defaultS)) params; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
819 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
820 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
821 |
(* errors *) |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
822 |
|
4890 | 823 |
val name = Sign.full_name sign bname; |
824 |
val err_dup_record = |
|
825 |
if is_none (get_record thy name) then [] |
|
826 |
else ["Duplicate definition of record " ^ quote name]; |
|
827 |
||
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
828 |
val err_dup_parms = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
829 |
(case duplicates params of |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
830 |
[] => [] |
4890 | 831 |
| dups => ["Duplicate parameter(s) " ^ commas dups]); |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
832 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
833 |
val err_extra_frees = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
834 |
(case gen_rems (op =) (envir_names, params) of |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
835 |
[] => [] |
4890 | 836 |
| extras => ["Extra free type variable(s) " ^ commas extras]); |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
837 |
|
4890 | 838 |
val err_no_fields = if null bfields then ["No fields present"] else []; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
839 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
840 |
val err_dup_fields = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
841 |
(case duplicates (map fst bfields) of |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
842 |
[] => [] |
4890 | 843 |
| dups => ["Duplicate field(s) " ^ commas_quote dups]); |
844 |
||
845 |
val err_bad_fields = |
|
846 |
if forall (not_equal moreN o fst) bfields then [] |
|
847 |
else ["Illegal field name " ^ quote moreN]; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
848 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
849 |
val err_dup_sorts = |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
850 |
(case duplicates envir_names of |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
851 |
[] => [] |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
852 |
| dups => ["Inconsistent sort constraints for " ^ commas dups]); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
853 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
854 |
val errs = |
4890 | 855 |
err_dup_record @ err_dup_parms @ err_extra_frees @ err_no_fields @ |
856 |
err_dup_fields @ err_bad_fields @ err_dup_sorts; |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
857 |
in |
4890 | 858 |
if null errs then () else error (cat_lines errs); |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
859 |
thy |> record_definition (args, bname) parent parents bfields |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
860 |
end |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
861 |
handle ERROR => error ("Failed to define record " ^ quote bname); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
862 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
863 |
val add_record = gen_add_record read_typ read_raw_parent; |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
864 |
val add_record_i = gen_add_record cert_typ (K I); |
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
865 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
866 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
867 |
|
6358 | 868 |
(** package setup **) |
869 |
||
870 |
(* setup theory *) |
|
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
871 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
872 |
val setup = |
5006 | 873 |
[RecordsData.init, |
5698 | 874 |
Theory.add_trfuns ([], parse_translation, [], []), |
6358 | 875 |
Method.add_methods [record_split_method], |
5698 | 876 |
add_wrapper record_split_wrapper]; |
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
877 |
|
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
878 |
|
6358 | 879 |
(* outer syntax *) |
880 |
||
6384 | 881 |
local open OuterParse in |
6358 | 882 |
|
883 |
val record_decl = |
|
884 |
type_args -- name -- ($$$ "=" |-- Scan.option (typ --| $$$ "+") |
|
885 |
-- Scan.repeat1 (name -- ($$$ "::" |-- typ))); |
|
886 |
||
887 |
val recordP = |
|
6384 | 888 |
OuterSyntax.command "record" "define extensible record" |
6519 | 889 |
(record_decl >> (fn (x, (y, z)) => Toplevel.theory (#1 o add_record x y z))); |
6358 | 890 |
|
891 |
val _ = OuterSyntax.add_parsers [recordP]; |
|
892 |
||
4867
9be2bf0ce909
package extensible records with structural subtyping in HOL -- still
wenzelm
parents:
diff
changeset
|
893 |
end; |
5698 | 894 |
|
895 |
||
6384 | 896 |
end; |
897 |
||
5698 | 898 |
structure BasicRecordPackage: BASIC_RECORD_PACKAGE = RecordPackage; |
899 |
open BasicRecordPackage; |