src/Pure/Isar/code.ML
author bulwahn
Fri May 06 11:57:21 2011 +0200 (2011-05-06 ago)
changeset 42707 42d607a9ae65
parent 42375 774df7c59508
child 43326 47cf4bc789aa
permissions -rw-r--r--
improving merge of code specifications by removing code equations of constructors after merging two theories
haftmann@24219
     1
(*  Title:      Pure/Isar/code.ML
haftmann@24219
     2
    Author:     Florian Haftmann, TU Muenchen
haftmann@24219
     3
haftmann@34173
     4
Abstract executable ingredients of theory.  Management of data
haftmann@34173
     5
dependent on executable ingredients as synchronized cache; purged
haftmann@34173
     6
on any change of underlying executable ingredients.
haftmann@24219
     7
*)
haftmann@24219
     8
haftmann@24219
     9
signature CODE =
haftmann@24219
    10
sig
haftmann@31957
    11
  (*constants*)
haftmann@31957
    12
  val check_const: theory -> term -> string
haftmann@31957
    13
  val read_bare_const: theory -> string -> string * typ
haftmann@31957
    14
  val read_const: theory -> string -> string
haftmann@31962
    15
  val string_of_const: theory -> string -> string
haftmann@33940
    16
  val cert_signature: theory -> typ -> typ
haftmann@33940
    17
  val read_signature: theory -> string -> typ
haftmann@33940
    18
  val const_typ: theory -> string -> typ
haftmann@33940
    19
  val subst_signatures: theory -> term -> term
haftmann@31962
    20
  val args_number: theory -> string -> int
haftmann@31957
    21
haftmann@31156
    22
  (*constructor sets*)
haftmann@31156
    23
  val constrset_of_consts: theory -> (string * typ) list
haftmann@40726
    24
    -> string * ((string * sort) list * (string * ((string * sort) list * typ list)) list)
haftmann@31156
    25
haftmann@34874
    26
  (*code equations and certificates*)
haftmann@31962
    27
  val mk_eqn: theory -> thm * bool -> thm * bool
haftmann@31962
    28
  val mk_eqn_warning: theory -> thm -> (thm * bool) option
haftmann@31962
    29
  val mk_eqn_liberal: theory -> thm -> (thm * bool) option
haftmann@31156
    30
  val assert_eqn: theory -> thm * bool -> thm * bool
haftmann@31957
    31
  val const_typ_eqn: theory -> thm -> string * typ
haftmann@34895
    32
  val expand_eta: theory -> int -> thm -> thm
haftmann@34895
    33
  type cert
haftmann@34891
    34
  val empty_cert: theory -> string -> cert
haftmann@34891
    35
  val cert_of_eqns: theory -> string -> (thm * bool) list -> cert
haftmann@34874
    36
  val constrain_cert: theory -> sort list -> cert -> cert
haftmann@35226
    37
  val typargs_deps_of_cert: theory -> cert -> (string * sort) list * (string * typ list) list
haftmann@36209
    38
  val equations_of_cert: theory -> cert -> ((string * sort) list * typ)
haftmann@36209
    39
    * (((term * string option) list * (term * string option)) * (thm option * bool)) list
haftmann@35226
    40
  val bare_thms_of_cert: theory -> cert -> thm list
haftmann@34895
    41
  val pretty_cert: theory -> cert -> Pretty.T list
haftmann@31156
    42
haftmann@31962
    43
  (*executable code*)
haftmann@33940
    44
  val add_type: string -> theory -> theory
haftmann@33940
    45
  val add_type_cmd: string -> theory -> theory
haftmann@33940
    46
  val add_signature: string * typ -> theory -> theory
haftmann@33940
    47
  val add_signature_cmd: string * string -> theory -> theory
haftmann@31156
    48
  val add_datatype: (string * typ) list -> theory -> theory
haftmann@31156
    49
  val add_datatype_cmd: string list -> theory -> theory
haftmann@35299
    50
  val datatype_interpretation:
haftmann@40726
    51
    (string * ((string * sort) list * (string * ((string * sort) list * typ list)) list)
haftmann@35299
    52
      -> theory -> theory) -> theory -> theory
haftmann@36112
    53
  val add_abstype: thm -> theory -> theory
haftmann@35299
    54
  val abstype_interpretation:
haftmann@40726
    55
    (string * ((string * sort) list * ((string * ((string * sort) list * typ)) * (string * thm)))
haftmann@31156
    56
      -> theory -> theory) -> theory -> theory
haftmann@28368
    57
  val add_eqn: thm -> theory -> theory
haftmann@31088
    58
  val add_nbe_eqn: thm -> theory -> theory
haftmann@28368
    59
  val add_default_eqn: thm -> theory -> theory
haftmann@28703
    60
  val add_default_eqn_attribute: attribute
haftmann@28703
    61
  val add_default_eqn_attrib: Attrib.src
haftmann@37425
    62
  val add_nbe_default_eqn: thm -> theory -> theory
haftmann@37425
    63
  val add_nbe_default_eqn_attribute: attribute
haftmann@37425
    64
  val add_nbe_default_eqn_attrib: Attrib.src
haftmann@28368
    65
  val del_eqn: thm -> theory -> theory
haftmann@28368
    66
  val del_eqns: string -> theory -> theory
haftmann@24844
    67
  val add_case: thm -> theory -> theory
haftmann@24844
    68
  val add_undefined: string -> theory -> theory
haftmann@40726
    69
  val get_type: theory -> string
haftmann@40726
    70
    -> ((string * sort) list * (string * ((string * sort) list * typ list)) list) * bool
haftmann@35299
    71
  val get_type_of_constr_or_abstr: theory -> string -> (string * bool) option
haftmann@35226
    72
  val is_constr: theory -> string -> bool
haftmann@35226
    73
  val is_abstr: theory -> string -> bool
haftmann@34891
    74
  val get_cert: theory -> ((thm * bool) list -> (thm * bool) list) -> string -> cert
haftmann@30023
    75
  val get_case_scheme: theory -> string -> (int * (int * string list)) option
haftmann@37438
    76
  val get_case_cong: theory -> string -> thm option
haftmann@31890
    77
  val undefineds: theory -> string list
haftmann@24219
    78
  val print_codesetup: theory -> unit
haftmann@31957
    79
haftmann@31957
    80
  (*infrastructure*)
haftmann@31998
    81
  val set_code_target_attr: (string -> thm -> theory -> theory) -> theory -> theory
haftmann@24219
    82
end;
haftmann@24219
    83
haftmann@24219
    84
signature CODE_DATA_ARGS =
haftmann@24219
    85
sig
haftmann@24219
    86
  type T
haftmann@24219
    87
  val empty: T
haftmann@24219
    88
end;
haftmann@24219
    89
haftmann@24219
    90
signature CODE_DATA =
haftmann@24219
    91
sig
haftmann@24219
    92
  type T
haftmann@39397
    93
  val change: theory option -> (T -> T) -> T
haftmann@39397
    94
  val change_yield: theory option -> (T -> 'a * T) -> 'a * T
haftmann@24219
    95
end;
haftmann@24219
    96
haftmann@24219
    97
signature PRIVATE_CODE =
haftmann@24219
    98
sig
haftmann@24219
    99
  include CODE
haftmann@34173
   100
  val declare_data: Object.T -> serial
haftmann@24219
   101
  val change_yield_data: serial * ('a -> Object.T) * (Object.T -> 'a)
haftmann@34251
   102
    -> theory -> ('a -> 'b * 'a) -> 'b * 'a
haftmann@24219
   103
end;
haftmann@24219
   104
haftmann@24219
   105
structure Code : PRIVATE_CODE =
haftmann@24219
   106
struct
haftmann@24219
   107
haftmann@31962
   108
(** auxiliary **)
haftmann@31962
   109
haftmann@31962
   110
(* printing *)
haftmann@31156
   111
wenzelm@39134
   112
fun string_of_typ thy =
wenzelm@39134
   113
  Syntax.string_of_typ (Config.put show_sorts true (Syntax.init_pretty_global thy));
haftmann@31962
   114
wenzelm@42359
   115
fun string_of_const thy c =
wenzelm@42360
   116
  let val ctxt = Proof_Context.init_global thy in
wenzelm@42359
   117
    case AxClass.inst_of_param thy c of
wenzelm@42359
   118
      SOME (c, tyco) =>
wenzelm@42360
   119
        Proof_Context.extern_const ctxt c ^ " " ^ enclose "[" "]"
wenzelm@42360
   120
          (Proof_Context.extern_type ctxt tyco)
wenzelm@42360
   121
    | NONE => Proof_Context.extern_const ctxt c
wenzelm@42359
   122
  end;
haftmann@31156
   123
haftmann@31962
   124
haftmann@31962
   125
(* constants *)
haftmann@31156
   126
haftmann@33940
   127
fun typ_equiv tys = Type.raw_instance tys andalso Type.raw_instance (swap tys);
haftmann@33940
   128
haftmann@31962
   129
fun check_bare_const thy t = case try dest_Const t
haftmann@31962
   130
 of SOME c_ty => c_ty
haftmann@31962
   131
  | NONE => error ("Not a constant: " ^ Syntax.string_of_term_global thy t);
haftmann@31156
   132
haftmann@40362
   133
fun check_unoverload thy (c, ty) =
haftmann@40362
   134
  let
haftmann@40362
   135
    val c' = AxClass.unoverload_const thy (c, ty);
haftmann@40362
   136
    val ty_decl = Sign.the_const_type thy c';
haftmann@40362
   137
  in if Sign.typ_equiv thy
haftmann@40362
   138
      (Type.strip_sorts ty_decl, Type.strip_sorts (Logic.varifyT_global ty)) then c'
haftmann@40362
   139
    else error ("Type\n" ^ string_of_typ thy ty
haftmann@40362
   140
      ^ "\nof constant " ^ quote c
haftmann@40362
   141
      ^ "\nis too specific compared to declared type\n"
haftmann@40362
   142
      ^ string_of_typ thy ty_decl)
haftmann@40362
   143
  end; 
haftmann@40362
   144
haftmann@40362
   145
fun check_const thy = check_unoverload thy o check_bare_const thy;
haftmann@31962
   146
haftmann@31962
   147
fun read_bare_const thy = check_bare_const thy o Syntax.read_term_global thy;
haftmann@31962
   148
haftmann@40362
   149
fun read_const thy = check_unoverload thy o read_bare_const thy;
haftmann@31156
   150
haftmann@32872
   151
haftmann@31962
   152
(** data store **)
haftmann@31962
   153
haftmann@35226
   154
(* datatypes *)
haftmann@35226
   155
haftmann@40726
   156
datatype typ_spec = Constructors of (string * ((string * sort) list * typ list)) list
haftmann@40726
   157
  | Abstractor of (string * ((string * sort) list * typ)) * (string * thm);
haftmann@31962
   158
haftmann@35226
   159
fun constructors_of (Constructors cos) = (cos, false)
haftmann@40726
   160
  | constructors_of (Abstractor ((co, (vs, ty)), _)) = ([(co, (vs, [ty]))], true);
haftmann@35226
   161
haftmann@35226
   162
haftmann@35226
   163
(* functions *)
haftmann@31962
   164
haftmann@37460
   165
datatype fun_spec = Default of (thm * bool) list * (thm * bool) list lazy
haftmann@35226
   166
  | Eqns of (thm * bool) list
haftmann@35226
   167
  | Proj of term * string
haftmann@35226
   168
  | Abstr of thm * string;
haftmann@31962
   169
haftmann@37460
   170
val empty_fun_spec = Default ([], Lazy.value []);
haftmann@31962
   171
haftmann@35226
   172
fun is_default (Default _) = true
haftmann@35226
   173
  | is_default _ = false;
haftmann@35226
   174
haftmann@35226
   175
fun associated_abstype (Abstr (_, tyco)) = SOME tyco
haftmann@35226
   176
  | associated_abstype _ = NONE;
haftmann@31962
   177
haftmann@31962
   178
haftmann@31962
   179
(* executable code data *)
haftmann@31962
   180
haftmann@31962
   181
datatype spec = Spec of {
haftmann@31962
   182
  history_concluded: bool,
haftmann@33940
   183
  signatures: int Symtab.table * typ Symtab.table,
haftmann@35226
   184
  functions: ((bool * fun_spec) * (serial * fun_spec) list) Symtab.table
haftmann@31962
   185
    (*with explicit history*),
haftmann@35299
   186
  types: ((serial * ((string * sort) list * typ_spec)) list) Symtab.table
haftmann@31962
   187
    (*with explicit history*),
haftmann@37438
   188
  cases: ((int * (int * string list)) * thm) Symtab.table * unit Symtab.table
haftmann@31962
   189
};
haftmann@31962
   190
haftmann@35299
   191
fun make_spec (history_concluded, ((signatures, functions), (types, cases))) =
haftmann@33940
   192
  Spec { history_concluded = history_concluded,
haftmann@35299
   193
    signatures = signatures, functions = functions, types = types, cases = cases };
haftmann@33940
   194
fun map_spec f (Spec { history_concluded = history_concluded, signatures = signatures,
haftmann@35299
   195
  functions = functions, types = types, cases = cases }) =
haftmann@35299
   196
  make_spec (f (history_concluded, ((signatures, functions), (types, cases))));
haftmann@35226
   197
fun merge_spec (Spec { history_concluded = _, signatures = (tycos1, sigs1), functions = functions1,
haftmann@35299
   198
    types = types1, cases = (cases1, undefs1) },
haftmann@35226
   199
  Spec { history_concluded = _, signatures = (tycos2, sigs2), functions = functions2,
haftmann@35299
   200
    types = types2, cases = (cases2, undefs2) }) =
haftmann@31156
   201
  let
haftmann@33940
   202
    val signatures = (Symtab.merge (op =) (tycos1, tycos2),
haftmann@33940
   203
      Symtab.merge typ_equiv (sigs1, sigs2));
bulwahn@42707
   204
    val types = Symtab.join (K (AList.merge (op =) (K true))) (types1, types2);
haftmann@35226
   205
    fun merge_functions ((_, history1), (_, history2)) =
haftmann@31962
   206
      let
haftmann@31962
   207
        val raw_history = AList.merge (op = : serial * serial -> bool)
haftmann@35226
   208
          (K true) (history1, history2);
haftmann@35226
   209
        val filtered_history = filter_out (is_default o snd) raw_history;
haftmann@31962
   210
        val history = if null filtered_history
haftmann@31962
   211
          then raw_history else filtered_history;
haftmann@31962
   212
      in ((false, (snd o hd) history), history) end;
bulwahn@42707
   213
    val all_constructors =
bulwahn@42707
   214
      maps (map fst o fst o constructors_of o snd o snd o hd o snd) (Symtab.dest types);
bulwahn@42707
   215
    val functions = Symtab.join (K merge_functions) (functions1, functions2)
bulwahn@42707
   216
      |> fold (fn c => Symtab.map_entry c (apfst (K (true, empty_fun_spec)))) all_constructors;
haftmann@31962
   217
    val cases = (Symtab.merge (K true) (cases1, cases2),
haftmann@31962
   218
      Symtab.merge (K true) (undefs1, undefs2));
haftmann@35299
   219
  in make_spec (false, ((signatures, functions), (types, cases))) end;
haftmann@31962
   220
haftmann@31962
   221
fun history_concluded (Spec { history_concluded, ... }) = history_concluded;
haftmann@33940
   222
fun the_signatures (Spec { signatures, ... }) = signatures;
haftmann@35226
   223
fun the_functions (Spec { functions, ... }) = functions;
haftmann@35299
   224
fun the_types (Spec { types, ... }) = types;
haftmann@31962
   225
fun the_cases (Spec { cases, ... }) = cases;
haftmann@32544
   226
val map_history_concluded = map_spec o apfst;
haftmann@33940
   227
val map_signatures = map_spec o apsnd o apfst o apfst;
haftmann@35226
   228
val map_functions = map_spec o apsnd o apfst o apsnd;
haftmann@35226
   229
val map_typs = map_spec o apsnd o apsnd o apfst;
haftmann@31962
   230
val map_cases = map_spec o apsnd o apsnd o apsnd;
haftmann@31962
   231
haftmann@31962
   232
haftmann@31962
   233
(* data slots dependent on executable code *)
haftmann@31962
   234
haftmann@31962
   235
(*private copy avoids potential conflict of table exceptions*)
wenzelm@31971
   236
structure Datatab = Table(type key = int val ord = int_ord);
haftmann@31962
   237
haftmann@31962
   238
local
haftmann@31962
   239
haftmann@34173
   240
type kind = { empty: Object.T };
haftmann@31962
   241
wenzelm@32738
   242
val kinds = Unsynchronized.ref (Datatab.empty: kind Datatab.table);
haftmann@31962
   243
haftmann@31962
   244
fun invoke f k = case Datatab.lookup (! kinds) k
haftmann@31962
   245
 of SOME kind => f kind
wenzelm@40316
   246
  | NONE => raise Fail "Invalid code data identifier";
haftmann@31962
   247
haftmann@31962
   248
in
haftmann@31962
   249
haftmann@34173
   250
fun declare_data empty =
haftmann@31962
   251
  let
haftmann@31962
   252
    val k = serial ();
haftmann@34173
   253
    val kind = { empty = empty };
haftmann@34173
   254
    val _ = CRITICAL (fn () => Unsynchronized.change kinds (Datatab.update (k, kind)));
haftmann@31962
   255
  in k end;
haftmann@31962
   256
haftmann@31962
   257
fun invoke_init k = invoke (fn kind => #empty kind) k;
haftmann@31962
   258
haftmann@31962
   259
end; (*local*)
haftmann@31962
   260
haftmann@31962
   261
haftmann@31962
   262
(* theory store *)
haftmann@31962
   263
haftmann@31962
   264
local
haftmann@31962
   265
haftmann@31962
   266
type data = Object.T Datatab.table;
haftmann@34244
   267
fun empty_dataref () = Synchronized.var "code data" (NONE : (data * theory_ref) option);
haftmann@31962
   268
haftmann@34244
   269
structure Code_Data = Theory_Data
haftmann@31962
   270
(
haftmann@34244
   271
  type T = spec * (data * theory_ref) option Synchronized.var;
haftmann@33940
   272
  val empty = (make_spec (false, (((Symtab.empty, Symtab.empty), Symtab.empty),
haftmann@34244
   273
    (Symtab.empty, (Symtab.empty, Symtab.empty)))), empty_dataref ());
wenzelm@41472
   274
  val extend = I  (* FIXME empty_dataref!?! *)
haftmann@34244
   275
  fun merge ((spec1, _), (spec2, _)) =
haftmann@34244
   276
    (merge_spec (spec1, spec2), empty_dataref ());
haftmann@31962
   277
);
haftmann@31962
   278
haftmann@31962
   279
in
haftmann@31962
   280
haftmann@35226
   281
haftmann@31962
   282
(* access to executable code *)
haftmann@31962
   283
haftmann@31962
   284
val the_exec = fst o Code_Data.get;
haftmann@31962
   285
haftmann@34244
   286
fun map_exec_purge f = Code_Data.map (fn (exec, _) => (f exec, empty_dataref ()));
haftmann@31962
   287
haftmann@35226
   288
fun change_fun_spec delete c f = (map_exec_purge o map_functions
haftmann@35226
   289
  o (if delete then Symtab.map_entry c else Symtab.map_default (c, ((false, empty_fun_spec), [])))
haftmann@35226
   290
    o apfst) (fn (_, spec) => (true, f spec));
haftmann@31962
   291
haftmann@31962
   292
haftmann@31962
   293
(* tackling equation history *)
haftmann@31962
   294
haftmann@31962
   295
fun continue_history thy = if (history_concluded o the_exec) thy
haftmann@31962
   296
  then thy
haftmann@31962
   297
    |> (Code_Data.map o apfst o map_history_concluded) (K false)
haftmann@31962
   298
    |> SOME
haftmann@31962
   299
  else NONE;
haftmann@31962
   300
haftmann@31962
   301
fun conclude_history thy = if (history_concluded o the_exec) thy
haftmann@31962
   302
  then NONE
haftmann@31962
   303
  else thy
haftmann@31962
   304
    |> (Code_Data.map o apfst)
haftmann@39020
   305
        ((map_functions o Symtab.map) (fn _ => fn ((changed, current), history) =>
haftmann@31962
   306
          ((false, current),
haftmann@31962
   307
            if changed then (serial (), current) :: history else history))
haftmann@31962
   308
        #> map_history_concluded (K true))
haftmann@31962
   309
    |> SOME;
haftmann@31962
   310
haftmann@34244
   311
val _ = Context.>> (Context.map_theory (Theory.at_begin continue_history #> Theory.at_end conclude_history));
haftmann@31962
   312
haftmann@31962
   313
haftmann@31962
   314
(* access to data dependent on abstract executable code *)
haftmann@31962
   315
haftmann@34244
   316
fun change_yield_data (kind, mk, dest) theory f =
haftmann@31962
   317
  let
haftmann@34244
   318
    val dataref = (snd o Code_Data.get) theory;
haftmann@34251
   319
    val (datatab, thy_ref) = case Synchronized.value dataref
haftmann@34251
   320
     of SOME (datatab, thy_ref) => if Theory.eq_thy (theory, Theory.deref thy_ref)
haftmann@34251
   321
          then (datatab, thy_ref)
haftmann@34251
   322
          else (Datatab.empty, Theory.check_thy theory)
haftmann@34251
   323
      | NONE => (Datatab.empty, Theory.check_thy theory)
haftmann@34244
   324
    val data = case Datatab.lookup datatab kind
haftmann@34244
   325
     of SOME data => data
haftmann@34244
   326
      | NONE => invoke_init kind;
haftmann@40758
   327
    val result as (_, data') = f (dest data);
haftmann@34244
   328
    val _ = Synchronized.change dataref
haftmann@34244
   329
      ((K o SOME) (Datatab.update (kind, mk data') datatab, thy_ref));
haftmann@34244
   330
  in result end;
haftmann@31962
   331
haftmann@31962
   332
end; (*local*)
haftmann@31962
   333
haftmann@31962
   334
haftmann@31962
   335
(** foundation **)
haftmann@31962
   336
haftmann@31962
   337
(* constants *)
haftmann@31962
   338
haftmann@33940
   339
fun arity_number thy tyco = case Symtab.lookup ((fst o the_signatures o the_exec) thy) tyco
haftmann@33940
   340
 of SOME n => n
haftmann@33940
   341
  | NONE => Sign.arity_number thy tyco;
haftmann@33940
   342
haftmann@33940
   343
fun build_tsig thy =
haftmann@33940
   344
  let
wenzelm@42375
   345
    val ctxt = Syntax.init_pretty_global thy;
wenzelm@42375
   346
    val (tycos, _) = the_signatures (the_exec thy);
wenzelm@42375
   347
    val decls = #types (Type.rep_tsig (Sign.tsig_of thy))
haftmann@34272
   348
      |> snd 
haftmann@34272
   349
      |> Symtab.fold (fn (tyco, n) =>
haftmann@34272
   350
          Symtab.update (tyco, Type.LogicalType n)) tycos;
haftmann@34272
   351
  in
haftmann@34272
   352
    Type.empty_tsig
wenzelm@42375
   353
    |> Symtab.fold (fn (tyco, Type.LogicalType n) => Type.add_type ctxt Name_Space.default_naming
haftmann@34272
   354
        (Binding.qualified_name tyco, n) | _ => I) decls
haftmann@34272
   355
  end;
haftmann@33940
   356
wenzelm@42375
   357
fun cert_signature thy =
wenzelm@42375
   358
  Logic.varifyT_global o Type.cert_typ (build_tsig thy) o Type.no_tvars;
haftmann@33940
   359
wenzelm@42375
   360
fun read_signature thy =
wenzelm@42375
   361
  cert_signature thy o Type.strip_sorts o Syntax.parse_typ (Proof_Context.init_global thy);
haftmann@33940
   362
haftmann@33940
   363
fun expand_signature thy = Type.cert_typ_mode Type.mode_syntax (Sign.tsig_of thy);
haftmann@33940
   364
haftmann@33940
   365
fun lookup_typ thy = Symtab.lookup ((snd o the_signatures o the_exec) thy);
haftmann@33940
   366
haftmann@33940
   367
fun const_typ thy c = case lookup_typ thy c
haftmann@33940
   368
 of SOME ty => ty
haftmann@33940
   369
  | NONE => (Type.strip_sorts o Sign.the_const_type thy) c;
haftmann@33940
   370
wenzelm@40844
   371
fun args_number thy = length o binder_types o const_typ thy;
haftmann@40764
   372
haftmann@33940
   373
fun subst_signature thy c ty =
haftmann@33940
   374
  let
haftmann@40758
   375
    fun mk_subst (Type (_, tys1)) (Type (_, tys2)) =
haftmann@33940
   376
          fold2 mk_subst tys1 tys2
haftmann@40758
   377
      | mk_subst ty (TVar (v, _)) = Vartab.update (v, ([], ty))
haftmann@33940
   378
  in case lookup_typ thy c
haftmann@33940
   379
   of SOME ty' => Envir.subst_type (mk_subst ty (expand_signature thy ty') Vartab.empty) ty'
haftmann@33940
   380
    | NONE => ty
haftmann@33940
   381
  end;
haftmann@33940
   382
haftmann@33940
   383
fun subst_signatures thy = map_aterms (fn Const (c, ty) => Const (c, subst_signature thy c ty) | t => t);
haftmann@33940
   384
haftmann@40764
   385
fun logical_typscheme thy (c, ty) =
haftmann@40764
   386
  (map dest_TFree (Sign.const_typargs thy (c, ty)), Type.strip_sorts ty);
haftmann@40764
   387
haftmann@40764
   388
fun typscheme thy (c, ty) = logical_typscheme thy (c, subst_signature thy c ty);
haftmann@31962
   389
haftmann@31962
   390
haftmann@31962
   391
(* datatypes *)
haftmann@31156
   392
haftmann@35226
   393
fun no_constr thy s (c, ty) = error ("Not a datatype constructor:\n" ^ string_of_const thy c
haftmann@35226
   394
  ^ " :: " ^ string_of_typ thy ty ^ "\n" ^ enclose "(" ")" s);
haftmann@35226
   395
haftmann@40803
   396
fun analyze_constructor thy (c, raw_ty) =
haftmann@31156
   397
  let
haftmann@35226
   398
    val _ = Thm.cterm_of thy (Const (c, raw_ty));
haftmann@35226
   399
    val ty = subst_signature thy c raw_ty;
wenzelm@35845
   400
    val ty_decl = (Logic.unvarifyT_global o const_typ thy) c;
haftmann@31156
   401
    fun last_typ c_ty ty =
haftmann@31156
   402
      let
haftmann@33531
   403
        val tfrees = Term.add_tfreesT ty [];
wenzelm@40844
   404
        val (tyco, vs) = (apsnd o map) dest_TFree (dest_Type (body_type ty))
haftmann@35226
   405
          handle TYPE _ => no_constr thy "bad type" c_ty
haftmann@36112
   406
        val _ = if tyco = "fun" then no_constr thy "bad type" c_ty else ();
haftmann@33531
   407
        val _ = if has_duplicates (eq_fst (op =)) vs
haftmann@35226
   408
          then no_constr thy "duplicate type variables in datatype" c_ty else ();
haftmann@33531
   409
        val _ = if length tfrees <> length vs
haftmann@35226
   410
          then no_constr thy "type variables missing in datatype" c_ty else ();
haftmann@31156
   411
      in (tyco, vs) end;
haftmann@35226
   412
    val (tyco, _) = last_typ (c, ty) ty_decl;
haftmann@35226
   413
    val (_, vs) = last_typ (c, ty) ty;
haftmann@35226
   414
  in ((tyco, map snd vs), (c, (map fst vs, ty))) end;
haftmann@35226
   415
haftmann@35226
   416
fun constrset_of_consts thy cs =
haftmann@35226
   417
  let
haftmann@35226
   418
    val _ = map (fn (c, _) => if (is_some o AxClass.class_of_param thy) c
haftmann@35226
   419
      then error ("Is a class parameter: " ^ string_of_const thy c) else ()) cs;
haftmann@31156
   420
    fun add ((tyco', sorts'), c) ((tyco, sorts), cs) =
haftmann@31156
   421
      let
haftmann@31998
   422
        val _ = if (tyco' : string) <> tyco
haftmann@31156
   423
          then error "Different type constructors in constructor set"
haftmann@31156
   424
          else ();
haftmann@40758
   425
        val sorts'' =
haftmann@40758
   426
          map2 (curry (Sorts.inter_sort (Sign.classes_of thy))) sorts' sorts
haftmann@40758
   427
      in ((tyco, sorts''), c :: cs) end;
haftmann@31156
   428
    fun inst vs' (c, (vs, ty)) =
haftmann@31156
   429
      let
haftmann@31156
   430
        val the_v = the o AList.lookup (op =) (vs ~~ vs');
haftmann@40803
   431
        val ty' = map_type_tfree (fn (v, _) => TFree (the_v v)) ty;
haftmann@40764
   432
        val (vs'', _) = logical_typscheme thy (c, ty');
wenzelm@40844
   433
      in (c, (vs'', binder_types ty')) end;
haftmann@40803
   434
    val c' :: cs' = map (analyze_constructor thy) cs;
haftmann@31156
   435
    val ((tyco, sorts), cs'') = fold add cs' (apsnd single c');
haftmann@31156
   436
    val vs = Name.names Name.context Name.aT sorts;
haftmann@31156
   437
    val cs''' = map (inst vs) cs'';
haftmann@31156
   438
  in (tyco, (vs, rev cs''')) end;
haftmann@31156
   439
haftmann@35299
   440
fun get_type_entry thy tyco = case these (Symtab.lookup ((the_types o the_exec) thy) tyco)
haftmann@35226
   441
 of (_, entry) :: _ => SOME entry
haftmann@35226
   442
  | _ => NONE;
haftmann@31962
   443
haftmann@40726
   444
fun get_type thy tyco = case get_type_entry thy tyco
haftmann@35226
   445
 of SOME (vs, spec) => apfst (pair vs) (constructors_of spec)
haftmann@35226
   446
  | NONE => arity_number thy tyco
haftmann@35226
   447
      |> Name.invents Name.context Name.aT
haftmann@35226
   448
      |> map (rpair [])
haftmann@35226
   449
      |> rpair []
haftmann@35226
   450
      |> rpair false;
haftmann@35226
   451
haftmann@35299
   452
fun get_abstype_spec thy tyco = case get_type_entry thy tyco
haftmann@35226
   453
 of SOME (vs, Abstractor spec) => (vs, spec)
haftmann@36122
   454
  | _ => error ("Not an abstract type: " ^ tyco);
haftmann@35226
   455
 
haftmann@35299
   456
fun get_type_of_constr_or_abstr thy c =
wenzelm@40844
   457
  case (body_type o const_typ thy) c
haftmann@40758
   458
   of Type (tyco, _) => let val ((_, cos), abstract) = get_type thy tyco
haftmann@35226
   459
        in if member (op =) (map fst cos) c then SOME (tyco, abstract) else NONE end
haftmann@31962
   460
    | _ => NONE;
haftmann@31962
   461
haftmann@35299
   462
fun is_constr thy c = case get_type_of_constr_or_abstr thy c
haftmann@35226
   463
 of SOME (_, false) => true
haftmann@35226
   464
   | _ => false;
haftmann@35226
   465
haftmann@35299
   466
fun is_abstr thy c = case get_type_of_constr_or_abstr thy c
haftmann@35226
   467
 of SOME (_, true) => true
haftmann@35226
   468
   | _ => false;
haftmann@31962
   469
haftmann@31156
   470
haftmann@34874
   471
(* bare code equations *)
haftmann@31156
   472
haftmann@35226
   473
(* convention for variables:
haftmann@35226
   474
    ?x ?'a   for free-floating theorems (e.g. in the data store)
haftmann@35226
   475
    ?x  'a   for certificates
haftmann@35226
   476
     x  'a   for final representation of equations
haftmann@35226
   477
*)
haftmann@35226
   478
haftmann@31156
   479
exception BAD_THM of string;
haftmann@31156
   480
fun bad_thm msg = raise BAD_THM msg;
haftmann@31156
   481
fun error_thm f thm = f thm handle BAD_THM msg => error msg;
haftmann@31642
   482
fun warning_thm f thm = SOME (f thm) handle BAD_THM msg => (warning msg; NONE)
haftmann@31156
   483
fun try_thm f thm = SOME (f thm) handle BAD_THM _ => NONE;
haftmann@31156
   484
haftmann@31156
   485
fun is_linear thm =
haftmann@31156
   486
  let val (_, args) = (strip_comb o fst o Logic.dest_equals o Thm.plain_prop_of) thm
haftmann@31156
   487
  in not (has_duplicates (op =) ((fold o fold_aterms)
haftmann@31156
   488
    (fn Var (v, _) => cons v | _ => I) args [])) end;
haftmann@31156
   489
haftmann@36209
   490
fun check_decl_ty thy (c, ty) =
haftmann@36209
   491
  let
haftmann@36209
   492
    val ty_decl = Sign.the_const_type thy c;
haftmann@36209
   493
  in if Sign.typ_equiv thy (Type.strip_sorts ty_decl, Type.strip_sorts ty) then ()
haftmann@36209
   494
    else bad_thm ("Type\n" ^ string_of_typ thy ty
haftmann@36209
   495
      ^ "\nof constant " ^ quote c
haftmann@40362
   496
      ^ "\nis too specific compared to declared type\n"
haftmann@36209
   497
      ^ string_of_typ thy ty_decl)
haftmann@36209
   498
  end; 
haftmann@36209
   499
haftmann@35226
   500
fun check_eqn thy { allow_nonlinear, allow_consts, allow_pats } thm (lhs, rhs) =
haftmann@31156
   501
  let
haftmann@34894
   502
    fun bad s = bad_thm (s ^ ":\n" ^ Display.string_of_thm_global thy thm);
haftmann@31156
   503
    fun vars_of t = fold_aterms (fn Var (v, _) => insert (op =) v
haftmann@34894
   504
      | Free _ => bad "Illegal free variable in equation"
haftmann@31156
   505
      | _ => I) t [];
haftmann@31156
   506
    fun tvars_of t = fold_term_types (fn _ =>
haftmann@31156
   507
      fold_atyps (fn TVar (v, _) => insert (op =) v
haftmann@34894
   508
        | TFree _ => bad "Illegal free type variable in equation")) t [];
haftmann@31156
   509
    val lhs_vs = vars_of lhs;
haftmann@31156
   510
    val rhs_vs = vars_of rhs;
haftmann@31156
   511
    val lhs_tvs = tvars_of lhs;
haftmann@31156
   512
    val rhs_tvs = tvars_of rhs;
haftmann@31156
   513
    val _ = if null (subtract (op =) lhs_vs rhs_vs)
haftmann@31156
   514
      then ()
haftmann@34894
   515
      else bad "Free variables on right hand side of equation";
haftmann@31156
   516
    val _ = if null (subtract (op =) lhs_tvs rhs_tvs)
haftmann@31156
   517
      then ()
haftmann@34894
   518
      else bad "Free type variables on right hand side of equation";
haftmann@34894
   519
    val (head, args) = strip_comb lhs;
haftmann@31156
   520
    val (c, ty) = case head
haftmann@31156
   521
     of Const (c_ty as (_, ty)) => (AxClass.unoverload_const thy c_ty, ty)
haftmann@34894
   522
      | _ => bad "Equation not headed by constant";
haftmann@34894
   523
    fun check _ (Abs _) = bad "Abstraction on left hand side of equation"
haftmann@31156
   524
      | check 0 (Var _) = ()
haftmann@34894
   525
      | check _ (Var _) = bad "Variable with application on left hand side of equation"
haftmann@31156
   526
      | check n (t1 $ t2) = (check (n+1) t1; check 0 t2)
haftmann@34894
   527
      | check n (Const (c_ty as (c, ty))) =
haftmann@35226
   528
          if allow_pats then let
haftmann@33940
   529
            val c' = AxClass.unoverload_const thy c_ty
wenzelm@40844
   530
          in if n = (length o binder_types o subst_signature thy c') ty
haftmann@35226
   531
            then if allow_consts orelse is_constr thy c'
haftmann@33940
   532
              then ()
haftmann@34894
   533
              else bad (quote c ^ " is not a constructor, on left hand side of equation")
haftmann@34894
   534
            else bad ("Partially applied constant " ^ quote c ^ " on left hand side of equation")
haftmann@36209
   535
          end else bad ("Pattern not allowed here, but constant " ^ quote c ^ " encountered on left hand side")
haftmann@31156
   536
    val _ = map (check 0) args;
haftmann@35226
   537
    val _ = if allow_nonlinear orelse is_linear thm then ()
haftmann@34894
   538
      else bad "Duplicate variables on left hand side of equation";
haftmann@34894
   539
    val _ = if (is_none o AxClass.class_of_param thy) c then ()
haftmann@34894
   540
      else bad "Overloaded constant as head in equation";
haftmann@34894
   541
    val _ = if not (is_constr thy c) then ()
haftmann@34894
   542
      else bad "Constructor as head in equation";
haftmann@35226
   543
    val _ = if not (is_abstr thy c) then ()
haftmann@35226
   544
      else bad "Abstractor as head in equation";
haftmann@36209
   545
    val _ = check_decl_ty thy (c, ty);
haftmann@35226
   546
  in () end;
haftmann@35226
   547
haftmann@35226
   548
fun gen_assert_eqn thy check_patterns (thm, proper) =
haftmann@35226
   549
  let
haftmann@35226
   550
    fun bad s = bad_thm (s ^ ":\n" ^ Display.string_of_thm_global thy thm);
haftmann@35226
   551
    val (lhs, rhs) = (Logic.dest_equals o Thm.plain_prop_of) thm
haftmann@35226
   552
      handle TERM _ => bad "Not an equation"
haftmann@35226
   553
           | THM _ => bad "Not a proper equation";
haftmann@35226
   554
    val _ = check_eqn thy { allow_nonlinear = not proper,
haftmann@35226
   555
      allow_consts = not (proper andalso check_patterns), allow_pats = true } thm (lhs, rhs);
haftmann@31156
   556
  in (thm, proper) end;
haftmann@31156
   557
haftmann@35226
   558
fun assert_abs_eqn thy some_tyco thm =
haftmann@35226
   559
  let
haftmann@35226
   560
    fun bad s = bad_thm (s ^ ":\n" ^ Display.string_of_thm_global thy thm);
haftmann@35226
   561
    val (full_lhs, rhs) = (Logic.dest_equals o Thm.plain_prop_of) thm
haftmann@35226
   562
      handle TERM _ => bad "Not an equation"
haftmann@35226
   563
           | THM _ => bad "Not a proper equation";
haftmann@35226
   564
    val (rep, lhs) = dest_comb full_lhs
haftmann@35226
   565
      handle TERM _ => bad "Not an abstract equation";
haftmann@36202
   566
    val (rep_const, ty) = dest_Const rep;
haftmann@40187
   567
    val (tyco, Ts) = (dest_Type o domain_type) ty
haftmann@39552
   568
      handle TERM _ => bad "Not an abstract equation"
haftmann@39552
   569
           | TYPE _ => bad "Not an abstract equation";
haftmann@35226
   570
    val _ = case some_tyco of SOME tyco' => if tyco = tyco' then ()
haftmann@35226
   571
          else bad ("Abstract type mismatch:" ^ quote tyco ^ " vs. " ^ quote tyco')
haftmann@35226
   572
      | NONE => ();
haftmann@36202
   573
    val (vs', (_, (rep', _))) = get_abstype_spec thy tyco;
haftmann@35226
   574
    val _ = if rep_const = rep' then ()
haftmann@35226
   575
      else bad ("Projection mismatch: " ^ quote rep_const ^ " vs. " ^ quote rep');
haftmann@35226
   576
    val _ = check_eqn thy { allow_nonlinear = false,
haftmann@35226
   577
      allow_consts = false, allow_pats = false } thm (lhs, rhs);
haftmann@40564
   578
    val _ = if forall2 (fn T => fn (_, sort) => Sign.of_sort thy (T, sort)) Ts vs' then ()
haftmann@40187
   579
      else error ("Type arguments do not satisfy sort constraints of abstype certificate.");
haftmann@35226
   580
  in (thm, tyco) end;
haftmann@35226
   581
haftmann@34894
   582
fun assert_eqn thy = error_thm (gen_assert_eqn thy true);
haftmann@31962
   583
wenzelm@42360
   584
fun meta_rewrite thy = Local_Defs.meta_rewrite_rule (Proof_Context.init_global thy);
haftmann@31156
   585
haftmann@34894
   586
fun mk_eqn thy = error_thm (gen_assert_eqn thy false) o
haftmann@31962
   587
  apfst (meta_rewrite thy);
haftmann@31962
   588
haftmann@31962
   589
fun mk_eqn_warning thy = Option.map (fn (thm, _) => (thm, is_linear thm))
haftmann@34894
   590
  o warning_thm (gen_assert_eqn thy false) o rpair false o meta_rewrite thy;
haftmann@31962
   591
haftmann@31962
   592
fun mk_eqn_liberal thy = Option.map (fn (thm, _) => (thm, is_linear thm))
haftmann@34894
   593
  o try_thm (gen_assert_eqn thy false) o rpair false o meta_rewrite thy;
haftmann@31156
   594
haftmann@35226
   595
fun mk_abs_eqn thy = error_thm (assert_abs_eqn thy NONE) o meta_rewrite thy;
haftmann@35226
   596
haftmann@33940
   597
val head_eqn = dest_Const o fst o strip_comb o fst o Logic.dest_equals o Thm.plain_prop_of;
haftmann@31156
   598
haftmann@31957
   599
fun const_typ_eqn thy thm =
haftmann@31156
   600
  let
haftmann@32640
   601
    val (c, ty) = head_eqn thm;
haftmann@31156
   602
    val c' = AxClass.unoverload_const thy (c, ty);
haftmann@33940
   603
      (*permissive wrt. to overloaded constants!*)
haftmann@31156
   604
  in (c', ty) end;
haftmann@33940
   605
haftmann@31957
   606
fun const_eqn thy = fst o const_typ_eqn thy;
haftmann@31156
   607
haftmann@35226
   608
fun const_abs_eqn thy = AxClass.unoverload_const thy o dest_Const o fst o strip_comb o snd
haftmann@35226
   609
  o dest_comb o fst o Logic.dest_equals o Thm.plain_prop_of;
haftmann@35226
   610
haftmann@35226
   611
fun mk_proj tyco vs ty abs rep =
haftmann@35226
   612
  let
haftmann@35226
   613
    val ty_abs = Type (tyco, map TFree vs);
haftmann@35226
   614
    val xarg = Var (("x", 0), ty);
haftmann@35226
   615
  in Logic.mk_equals (Const (rep, ty_abs --> ty) $ (Const (abs, ty --> ty_abs) $ xarg), xarg) end;
haftmann@35226
   616
haftmann@34895
   617
haftmann@34895
   618
(* technical transformations of code equations *)
haftmann@34895
   619
haftmann@34895
   620
fun expand_eta thy k thm =
haftmann@34895
   621
  let
haftmann@34895
   622
    val (lhs, rhs) = (Logic.dest_equals o Thm.plain_prop_of) thm;
haftmann@34895
   623
    val (_, args) = strip_comb lhs;
haftmann@34895
   624
    val l = if k = ~1
haftmann@34895
   625
      then (length o fst o strip_abs) rhs
haftmann@34895
   626
      else Int.max (0, k - length args);
haftmann@34895
   627
    val (raw_vars, _) = Term.strip_abs_eta l rhs;
haftmann@34895
   628
    val vars = burrow_fst (Name.variant_list (map (fst o fst) (Term.add_vars lhs [])))
haftmann@34895
   629
      raw_vars;
haftmann@34895
   630
    fun expand (v, ty) thm = Drule.fun_cong_rule thm
haftmann@34895
   631
      (Thm.cterm_of thy (Var ((v, 0), ty)));
haftmann@34895
   632
  in
haftmann@34895
   633
    thm
haftmann@34895
   634
    |> fold expand vars
haftmann@34895
   635
    |> Conv.fconv_rule Drule.beta_eta_conversion
haftmann@34895
   636
  end;
haftmann@34895
   637
haftmann@34895
   638
fun same_arity thy thms =
haftmann@31962
   639
  let
haftmann@34895
   640
    val num_args_of = length o snd o strip_comb o fst o Logic.dest_equals;
haftmann@34895
   641
    val k = fold (Integer.max o num_args_of o Thm.prop_of) thms 0;
haftmann@34895
   642
  in map (expand_eta thy k) thms end;
haftmann@34895
   643
haftmann@34895
   644
fun mk_desymbolization pre post mk vs =
haftmann@34895
   645
  let
haftmann@34895
   646
    val names = map (pre o fst o fst) vs
haftmann@34895
   647
      |> map (Name.desymbolize false)
haftmann@34895
   648
      |> Name.variant_list []
haftmann@34895
   649
      |> map post;
haftmann@34895
   650
  in map_filter (fn (((v, i), x), v') =>
haftmann@34895
   651
    if v = v' andalso i = 0 then NONE
haftmann@34895
   652
    else SOME (((v, i), x), mk ((v', 0), x))) (vs ~~ names)
haftmann@34895
   653
  end;
haftmann@34895
   654
haftmann@40758
   655
fun desymbolize_tvars thms =
haftmann@34895
   656
  let
haftmann@34895
   657
    val tvs = fold (Term.add_tvars o Thm.prop_of) thms [];
haftmann@34895
   658
    val tvar_subst = mk_desymbolization (unprefix "'") (prefix "'") TVar tvs;
haftmann@34895
   659
  in map (Thm.certify_instantiate (tvar_subst, [])) thms end;
haftmann@34895
   660
haftmann@40758
   661
fun desymbolize_vars thm =
haftmann@34895
   662
  let
haftmann@34895
   663
    val vs = Term.add_vars (Thm.prop_of thm) [];
haftmann@34895
   664
    val var_subst = mk_desymbolization I I Var vs;
haftmann@34895
   665
  in Thm.certify_instantiate ([], var_subst) thm end;
haftmann@34895
   666
haftmann@40758
   667
fun canonize_thms thy = desymbolize_tvars #> same_arity thy #> map desymbolize_vars;
haftmann@31156
   668
haftmann@34874
   669
haftmann@36112
   670
(* abstype certificates *)
haftmann@36112
   671
haftmann@36112
   672
fun check_abstype_cert thy proto_thm =
haftmann@36112
   673
  let
haftmann@36209
   674
    val thm = (AxClass.unoverload thy o meta_rewrite thy) proto_thm;
haftmann@36112
   675
    fun bad s = bad_thm (s ^ ":\n" ^ Display.string_of_thm_global thy thm);
haftmann@36112
   676
    val (lhs, rhs) = Logic.dest_equals (Thm.plain_prop_of thm)
haftmann@36112
   677
      handle TERM _ => bad "Not an equation"
haftmann@36112
   678
           | THM _ => bad "Not a proper equation";
haftmann@36209
   679
    val ((abs, raw_ty), ((rep, rep_ty), param)) = (apsnd (apfst dest_Const o dest_comb)
haftmann@36112
   680
        o apfst dest_Const o dest_comb) lhs
haftmann@36112
   681
      handle TERM _ => bad "Not an abstype certificate";
haftmann@36209
   682
    val _ = pairself (fn c => if (is_some o AxClass.class_of_param thy) c
haftmann@36209
   683
      then error ("Is a class parameter: " ^ string_of_const thy c) else ()) (abs, rep);
haftmann@36209
   684
    val _ = check_decl_ty thy (abs, raw_ty);
haftmann@36209
   685
    val _ = check_decl_ty thy (rep, rep_ty);
haftmann@40758
   686
    val _ = (fst o dest_Var) param
haftmann@36112
   687
      handle TERM _ => bad "Not an abstype certificate";
haftmann@36112
   688
    val _ = if param = rhs then () else bad "Not an abstype certificate";
haftmann@40803
   689
    val ((tyco, sorts), (abs, (vs, ty'))) = analyze_constructor thy (abs, Logic.unvarifyT_global raw_ty);
haftmann@36112
   690
    val ty = domain_type ty';
haftmann@40764
   691
    val (vs', _) = logical_typscheme thy (abs, ty');
haftmann@40726
   692
  in (tyco, (vs ~~ sorts, ((abs, (vs', ty)), (rep, thm)))) end;
haftmann@36112
   693
haftmann@36112
   694
haftmann@34874
   695
(* code equation certificates *)
haftmann@34874
   696
haftmann@34895
   697
fun build_head thy (c, ty) =
haftmann@34895
   698
  Thm.cterm_of thy (Logic.mk_equals (Free ("HEAD", ty), Const (c, ty)));
haftmann@34874
   699
haftmann@34895
   700
fun get_head thy cert_thm =
haftmann@34895
   701
  let
haftmann@34895
   702
    val [head] = (#hyps o Thm.crep_thm) cert_thm;
haftmann@34895
   703
    val (_, Const (c, ty)) = (Logic.dest_equals o Thm.term_of) head;
haftmann@34895
   704
  in (typscheme thy (c, ty), head) end;
haftmann@34895
   705
haftmann@35226
   706
fun typscheme_projection thy =
haftmann@35226
   707
  typscheme thy o dest_Const o fst o dest_comb o fst o Logic.dest_equals;
haftmann@35226
   708
haftmann@35226
   709
fun typscheme_abs thy =
haftmann@35226
   710
  typscheme thy o dest_Const o fst o strip_comb o snd o dest_comb o fst o Logic.dest_equals o Thm.prop_of;
haftmann@35226
   711
haftmann@35226
   712
fun constrain_thm thy vs sorts thm =
haftmann@35226
   713
  let
haftmann@35226
   714
    val mapping = map2 (fn (v, sort) => fn sort' =>
haftmann@35226
   715
      (v, Sorts.inter_sort (Sign.classes_of thy) (sort, sort'))) vs sorts;
haftmann@35226
   716
    val inst = map2 (fn (v, sort) => fn (_, sort') =>
haftmann@35226
   717
      (((v, 0), sort), TFree (v, sort'))) vs mapping;
haftmann@40803
   718
    val subst = (map_types o map_type_tfree)
haftmann@40803
   719
      (fn (v, _) => TFree (v, the (AList.lookup (op =) mapping v)));
haftmann@35226
   720
  in
haftmann@35226
   721
    thm
wenzelm@35845
   722
    |> Thm.varifyT_global
haftmann@35226
   723
    |> Thm.certify_instantiate (inst, [])
haftmann@35226
   724
    |> pair subst
haftmann@35226
   725
  end;
haftmann@35226
   726
haftmann@35226
   727
fun concretify_abs thy tyco abs_thm =
haftmann@35226
   728
  let
haftmann@40758
   729
    val (_, ((c, _), (_, cert))) = get_abstype_spec thy tyco;
haftmann@35226
   730
    val lhs = (fst o Logic.dest_equals o Thm.prop_of) abs_thm
haftmann@35226
   731
    val ty = fastype_of lhs;
haftmann@35226
   732
    val ty_abs = (fastype_of o snd o dest_comb) lhs;
haftmann@35226
   733
    val abs = Thm.cterm_of thy (Const (c, ty --> ty_abs));
haftmann@35226
   734
    val raw_concrete_thm = Drule.transitive_thm OF [Thm.symmetric cert, Thm.combination (Thm.reflexive abs) abs_thm];
wenzelm@35845
   735
  in (c, (Thm.varifyT_global o zero_var_indexes) raw_concrete_thm) end;
haftmann@35226
   736
haftmann@35226
   737
fun add_rhss_of_eqn thy t =
haftmann@35226
   738
  let
haftmann@35226
   739
    val (args, rhs) = (apfst (snd o strip_comb) o Logic.dest_equals o subst_signatures thy) t;
haftmann@35226
   740
    fun add_const (Const (c, ty)) = insert (op =) (c, Sign.const_typargs thy (c, ty))
haftmann@35226
   741
      | add_const _ = I
haftmann@39568
   742
    val add_consts = fold_aterms add_const
haftmann@39568
   743
  in add_consts rhs o fold add_consts args end;
haftmann@35226
   744
wenzelm@35845
   745
fun dest_eqn thy =
wenzelm@35845
   746
  apfst (snd o strip_comb) o Logic.dest_equals o subst_signatures thy o Logic.unvarify_global;
haftmann@35226
   747
haftmann@35226
   748
abstype cert = Equations of thm * bool list
haftmann@35226
   749
  | Projection of term * string
haftmann@35226
   750
  | Abstract of thm * string
haftmann@35226
   751
with
haftmann@34891
   752
haftmann@34891
   753
fun empty_cert thy c = 
haftmann@34891
   754
  let
haftmann@40761
   755
    val raw_ty = Logic.unvarifyT_global (const_typ thy c);
haftmann@40764
   756
    val (vs, _) = logical_typscheme thy (c, raw_ty);
haftmann@40761
   757
    val sortargs = case AxClass.class_of_param thy c
haftmann@40761
   758
     of SOME class => [[class]]
haftmann@40761
   759
      | NONE => (case get_type_of_constr_or_abstr thy c
haftmann@40761
   760
         of SOME (tyco, _) => (map snd o fst o the)
haftmann@40761
   761
              (AList.lookup (op =) ((snd o fst o get_type thy) tyco) c)
haftmann@40761
   762
          | NONE => replicate (length vs) []);
haftmann@40761
   763
    val the_sort = the o AList.lookup (op =) (map fst vs ~~ sortargs);
haftmann@40761
   764
    val ty = map_type_tfree (fn (v, _) => TFree (v, the_sort v)) raw_ty
haftmann@34895
   765
    val chead = build_head thy (c, ty);
haftmann@35226
   766
  in Equations (Thm.weaken chead Drule.dummy_thm, []) end;
haftmann@34891
   767
haftmann@34891
   768
fun cert_of_eqns thy c [] = empty_cert thy c
haftmann@34895
   769
  | cert_of_eqns thy c raw_eqns = 
haftmann@34874
   770
      let
haftmann@34895
   771
        val eqns = burrow_fst (canonize_thms thy) raw_eqns;
haftmann@34895
   772
        val _ = map (assert_eqn thy) eqns;
haftmann@34891
   773
        val (thms, propers) = split_list eqns;
haftmann@34895
   774
        val _ = map (fn thm => if c = const_eqn thy thm then ()
haftmann@34895
   775
          else error ("Wrong head of code equation,\nexpected constant "
haftmann@34895
   776
            ^ string_of_const thy c ^ "\n" ^ Display.string_of_thm_global thy thm)) thms;
haftmann@34891
   777
        fun tvars_of T = rev (Term.add_tvarsT T []);
haftmann@34891
   778
        val vss = map (tvars_of o snd o head_eqn) thms;
haftmann@34891
   779
        fun inter_sorts vs =
haftmann@34891
   780
          fold (curry (Sorts.inter_sort (Sign.classes_of thy)) o snd) vs [];
haftmann@34891
   781
        val sorts = map_transpose inter_sorts vss;
haftmann@34891
   782
        val vts = Name.names Name.context Name.aT sorts;
haftmann@40758
   783
        val thms' =
haftmann@34891
   784
          map2 (fn vs => Thm.certify_instantiate (vs ~~ map TFree vts, [])) vss thms;
haftmann@40758
   785
        val head_thm = Thm.symmetric (Thm.assume (build_head thy (head_eqn (hd thms'))));
haftmann@34874
   786
        fun head_conv ct = if can Thm.dest_comb ct
haftmann@34874
   787
          then Conv.fun_conv head_conv ct
haftmann@34874
   788
          else Conv.rewr_conv head_thm ct;
haftmann@34874
   789
        val rewrite_head = Conv.fconv_rule (Conv.arg1_conv head_conv);
haftmann@40758
   790
        val cert_thm = Conjunction.intr_balanced (map rewrite_head thms');
haftmann@35226
   791
      in Equations (cert_thm, propers) end;
haftmann@34891
   792
haftmann@35226
   793
fun cert_of_proj thy c tyco =
haftmann@35226
   794
  let
haftmann@40758
   795
    val (vs, ((abs, (_, ty)), (rep, _))) = get_abstype_spec thy tyco;
haftmann@35226
   796
    val _ = if c = rep then () else
haftmann@35226
   797
      error ("Wrong head of projection,\nexpected constant " ^ string_of_const thy rep);
haftmann@35226
   798
  in Projection (mk_proj tyco vs ty abs rep, tyco) end;
haftmann@35226
   799
haftmann@35226
   800
fun cert_of_abs thy tyco c raw_abs_thm =
haftmann@34874
   801
  let
haftmann@35226
   802
    val abs_thm = singleton (canonize_thms thy) raw_abs_thm;
haftmann@35226
   803
    val _ = assert_abs_eqn thy (SOME tyco) abs_thm;
haftmann@35226
   804
    val _ = if c = const_abs_eqn thy abs_thm then ()
haftmann@35226
   805
      else error ("Wrong head of abstract code equation,\nexpected constant "
haftmann@35226
   806
        ^ string_of_const thy c ^ "\n" ^ Display.string_of_thm_global thy abs_thm);
wenzelm@36615
   807
  in Abstract (Thm.legacy_freezeT abs_thm, tyco) end;
haftmann@34874
   808
haftmann@35226
   809
fun constrain_cert thy sorts (Equations (cert_thm, propers)) =
haftmann@35226
   810
      let
haftmann@35226
   811
        val ((vs, _), head) = get_head thy cert_thm;
haftmann@35226
   812
        val (subst, cert_thm') = cert_thm
haftmann@35226
   813
          |> Thm.implies_intr head
haftmann@35226
   814
          |> constrain_thm thy vs sorts;
haftmann@35226
   815
        val head' = Thm.term_of head
haftmann@35226
   816
          |> subst
haftmann@35226
   817
          |> Thm.cterm_of thy;
haftmann@35226
   818
        val cert_thm'' = cert_thm'
haftmann@35226
   819
          |> Thm.elim_implies (Thm.assume head');
haftmann@35226
   820
      in Equations (cert_thm'', propers) end
haftmann@35226
   821
  | constrain_cert thy _ (cert as Projection _) =
haftmann@35226
   822
      cert
haftmann@35226
   823
  | constrain_cert thy sorts (Abstract (abs_thm, tyco)) =
haftmann@35226
   824
      Abstract (snd (constrain_thm thy (fst (typscheme_abs thy abs_thm)) sorts abs_thm), tyco);
haftmann@35226
   825
haftmann@35226
   826
fun typscheme_of_cert thy (Equations (cert_thm, _)) =
haftmann@35226
   827
      fst (get_head thy cert_thm)
haftmann@35226
   828
  | typscheme_of_cert thy (Projection (proj, _)) =
haftmann@35226
   829
      typscheme_projection thy proj
haftmann@35226
   830
  | typscheme_of_cert thy (Abstract (abs_thm, _)) =
haftmann@35226
   831
      typscheme_abs thy abs_thm;
haftmann@34874
   832
haftmann@35226
   833
fun typargs_deps_of_cert thy (Equations (cert_thm, propers)) =
haftmann@35226
   834
      let
haftmann@35226
   835
        val vs = (fst o fst) (get_head thy cert_thm);
haftmann@35226
   836
        val equations = if null propers then [] else
haftmann@35226
   837
          Thm.prop_of cert_thm
haftmann@35226
   838
          |> Logic.dest_conjunction_balanced (length propers);
haftmann@35226
   839
      in (vs, fold (add_rhss_of_eqn thy) equations []) end
haftmann@40758
   840
  | typargs_deps_of_cert thy (Projection (t, _)) =
haftmann@35226
   841
      (fst (typscheme_projection thy t), add_rhss_of_eqn thy t [])
haftmann@35226
   842
  | typargs_deps_of_cert thy (Abstract (abs_thm, tyco)) =
haftmann@35226
   843
      let
haftmann@35226
   844
        val vs = fst (typscheme_abs thy abs_thm);
haftmann@35226
   845
        val (_, concrete_thm) = concretify_abs thy tyco abs_thm;
haftmann@36202
   846
      in (vs, add_rhss_of_eqn thy (map_types Logic.unvarifyT_global (Thm.prop_of concrete_thm)) []) end;
haftmann@34895
   847
haftmann@35226
   848
fun equations_of_cert thy (cert as Equations (cert_thm, propers)) =
haftmann@35226
   849
      let
haftmann@35226
   850
        val tyscm = typscheme_of_cert thy cert;
haftmann@35226
   851
        val thms = if null propers then [] else
haftmann@35226
   852
          cert_thm
wenzelm@35624
   853
          |> Local_Defs.expand [snd (get_head thy cert_thm)]
wenzelm@35845
   854
          |> Thm.varifyT_global
haftmann@35226
   855
          |> Conjunction.elim_balanced (length propers);
haftmann@36209
   856
        fun abstractions (args, rhs) = (map (rpair NONE) args, (rhs, NONE));
haftmann@36209
   857
      in (tyscm, map (abstractions o dest_eqn thy o Thm.prop_of) thms ~~ (map SOME thms ~~ propers)) end
haftmann@35226
   858
  | equations_of_cert thy (Projection (t, tyco)) =
haftmann@35226
   859
      let
haftmann@35226
   860
        val (_, ((abs, _), _)) = get_abstype_spec thy tyco;
haftmann@35226
   861
        val tyscm = typscheme_projection thy t;
wenzelm@35845
   862
        val t' = map_types Logic.varifyT_global t;
haftmann@36209
   863
        fun abstractions (args, rhs) = (map (rpair (SOME abs)) args, (rhs, NONE));
haftmann@36209
   864
      in (tyscm, [((abstractions o dest_eqn thy) t', (NONE, true))]) end
haftmann@35226
   865
  | equations_of_cert thy (Abstract (abs_thm, tyco)) =
haftmann@35226
   866
      let
haftmann@35226
   867
        val tyscm = typscheme_abs thy abs_thm;
haftmann@35226
   868
        val (abs, concrete_thm) = concretify_abs thy tyco abs_thm;
haftmann@36209
   869
        fun abstractions (args, rhs) = (map (rpair NONE) args, (rhs, (SOME abs)));
wenzelm@35845
   870
      in
haftmann@36209
   871
        (tyscm, [((abstractions o dest_eqn thy o Thm.prop_of) concrete_thm,
haftmann@36209
   872
          (SOME (Thm.varifyT_global abs_thm), true))])
wenzelm@35845
   873
      end;
haftmann@34895
   874
haftmann@35226
   875
fun pretty_cert thy (cert as Equations _) =
haftmann@35226
   876
      (map_filter (Option.map (Display.pretty_thm_global thy o AxClass.overload thy) o fst o snd)
haftmann@35226
   877
         o snd o equations_of_cert thy) cert
haftmann@35226
   878
  | pretty_cert thy (Projection (t, _)) =
wenzelm@35845
   879
      [Syntax.pretty_term_global thy (map_types Logic.varifyT_global t)]
haftmann@40758
   880
  | pretty_cert thy (Abstract (abs_thm, _)) =
wenzelm@35845
   881
      [(Display.pretty_thm_global thy o AxClass.overload thy o Thm.varifyT_global) abs_thm];
haftmann@35226
   882
haftmann@35226
   883
fun bare_thms_of_cert thy (cert as Equations _) =
haftmann@35226
   884
      (map_filter (fn (_, (some_thm, proper)) => if proper then some_thm else NONE)
haftmann@35226
   885
        o snd o equations_of_cert thy) cert
haftmann@35376
   886
  | bare_thms_of_cert thy (Projection _) = []
haftmann@35376
   887
  | bare_thms_of_cert thy (Abstract (abs_thm, tyco)) =
wenzelm@35845
   888
      [Thm.varifyT_global (snd (concretify_abs thy tyco abs_thm))];
haftmann@34895
   889
haftmann@34895
   890
end;
haftmann@34891
   891
haftmann@34874
   892
haftmann@35226
   893
(* code certificate access *)
haftmann@35226
   894
haftmann@35226
   895
fun retrieve_raw thy c =
haftmann@35226
   896
  Symtab.lookup ((the_functions o the_exec) thy) c
haftmann@35226
   897
  |> Option.map (snd o fst)
haftmann@37460
   898
  |> the_default empty_fun_spec
haftmann@34874
   899
haftmann@35226
   900
fun get_cert thy f c = case retrieve_raw thy c
haftmann@37460
   901
 of Default (_, eqns_lazy) => Lazy.force eqns_lazy
haftmann@35226
   902
      |> (map o apfst) (Thm.transfer thy)
haftmann@35226
   903
      |> f
haftmann@35226
   904
      |> (map o apfst) (AxClass.unoverload thy)
haftmann@35226
   905
      |> cert_of_eqns thy c
haftmann@35226
   906
  | Eqns eqns => eqns
haftmann@35226
   907
      |> (map o apfst) (Thm.transfer thy)
haftmann@35226
   908
      |> f
haftmann@35226
   909
      |> (map o apfst) (AxClass.unoverload thy)
haftmann@35226
   910
      |> cert_of_eqns thy c
haftmann@35226
   911
  | Proj (_, tyco) =>
haftmann@35226
   912
      cert_of_proj thy c tyco
haftmann@35226
   913
  | Abstr (abs_thm, tyco) => abs_thm
haftmann@35226
   914
      |> Thm.transfer thy
haftmann@35226
   915
      |> AxClass.unoverload thy
haftmann@35226
   916
      |> cert_of_abs thy tyco c;
haftmann@31962
   917
haftmann@31962
   918
haftmann@31962
   919
(* cases *)
haftmann@31156
   920
haftmann@31156
   921
fun case_certificate thm =
haftmann@31156
   922
  let
haftmann@31156
   923
    val ((head, raw_case_expr), cases) = (apfst Logic.dest_equals
haftmann@32640
   924
      o apsnd Logic.dest_conjunctions o Logic.dest_implies o Thm.plain_prop_of) thm;
haftmann@31156
   925
    val _ = case head of Free _ => true
haftmann@31156
   926
      | Var _ => true
haftmann@31156
   927
      | _ => raise TERM ("case_cert", []);
haftmann@31156
   928
    val ([(case_var, _)], case_expr) = Term.strip_abs_eta 1 raw_case_expr;
haftmann@31156
   929
    val (Const (case_const, _), raw_params) = strip_comb case_expr;
haftmann@31156
   930
    val n = find_index (fn Free (v, _) => v = case_var | _ => false) raw_params;
haftmann@31156
   931
    val _ = if n = ~1 then raise TERM ("case_cert", []) else ();
haftmann@31156
   932
    val params = map (fst o dest_Var) (nth_drop n raw_params);
haftmann@31156
   933
    fun dest_case t =
haftmann@31156
   934
      let
haftmann@31156
   935
        val (head' $ t_co, rhs) = Logic.dest_equals t;
haftmann@31156
   936
        val _ = if head' = head then () else raise TERM ("case_cert", []);
haftmann@31156
   937
        val (Const (co, _), args) = strip_comb t_co;
haftmann@31156
   938
        val (Var (param, _), args') = strip_comb rhs;
haftmann@31156
   939
        val _ = if args' = args then () else raise TERM ("case_cert", []);
haftmann@31156
   940
      in (param, co) end;
haftmann@31156
   941
    fun analyze_cases cases =
haftmann@31156
   942
      let
haftmann@31156
   943
        val co_list = fold (AList.update (op =) o dest_case) cases [];
haftmann@31156
   944
      in map (the o AList.lookup (op =) co_list) params end;
haftmann@31156
   945
    fun analyze_let t =
haftmann@31156
   946
      let
haftmann@31156
   947
        val (head' $ arg, Var (param', _) $ arg') = Logic.dest_equals t;
haftmann@31156
   948
        val _ = if head' = head then () else raise TERM ("case_cert", []);
haftmann@31156
   949
        val _ = if arg' = arg then () else raise TERM ("case_cert", []);
haftmann@31156
   950
        val _ = if [param'] = params then () else raise TERM ("case_cert", []);
haftmann@31156
   951
      in [] end;
haftmann@31156
   952
    fun analyze (cases as [let_case]) =
haftmann@31156
   953
          (analyze_cases cases handle Bind => analyze_let let_case)
haftmann@31156
   954
      | analyze cases = analyze_cases cases;
haftmann@31156
   955
  in (case_const, (n, analyze cases)) end;
haftmann@31156
   956
haftmann@31156
   957
fun case_cert thm = case_certificate thm
haftmann@31156
   958
  handle Bind => error "bad case certificate"
haftmann@31156
   959
       | TERM _ => error "bad case certificate";
haftmann@31156
   960
haftmann@37438
   961
fun get_case_scheme thy = Option.map fst o Symtab.lookup ((fst o the_cases o the_exec) thy);
haftmann@37438
   962
fun get_case_cong thy = Option.map snd o Symtab.lookup ((fst o the_cases o the_exec) thy);
haftmann@24219
   963
haftmann@31962
   964
val undefineds = Symtab.keys o snd o the_cases o the_exec;
haftmann@24219
   965
haftmann@24219
   966
haftmann@31962
   967
(* diagnostic *)
haftmann@24219
   968
haftmann@24219
   969
fun print_codesetup thy =
haftmann@24219
   970
  let
wenzelm@42360
   971
    val ctxt = Proof_Context.init_global thy;
haftmann@24844
   972
    val exec = the_exec thy;
haftmann@35226
   973
    fun pretty_equations const thms =
haftmann@24219
   974
      (Pretty.block o Pretty.fbreaks) (
haftmann@35226
   975
        Pretty.str (string_of_const thy const) :: map (Display.pretty_thm ctxt) thms
haftmann@24219
   976
      );
haftmann@37460
   977
    fun pretty_function (const, Default (_, eqns_lazy)) = pretty_equations const (map fst (Lazy.force eqns_lazy))
haftmann@35226
   978
      | pretty_function (const, Eqns eqns) = pretty_equations const (map fst eqns)
haftmann@35226
   979
      | pretty_function (const, Proj (proj, _)) = Pretty.block
haftmann@35226
   980
          [Pretty.str (string_of_const thy const), Pretty.fbrk, Syntax.pretty_term ctxt proj]
haftmann@35226
   981
      | pretty_function (const, Abstr (thm, _)) = pretty_equations const [thm];
haftmann@35226
   982
    fun pretty_typ (tyco, vs) = Pretty.str
haftmann@35226
   983
      (string_of_typ thy (Type (tyco, map TFree vs)));
haftmann@35226
   984
    fun pretty_typspec (typ, (cos, abstract)) = if null cos
haftmann@35226
   985
      then pretty_typ typ
haftmann@35226
   986
      else (Pretty.block o Pretty.breaks) (
haftmann@35226
   987
        pretty_typ typ
haftmann@35226
   988
        :: Pretty.str "="
haftmann@35226
   989
        :: (if abstract then [Pretty.str "(abstract)"] else [])
haftmann@40726
   990
        @ separate (Pretty.str "|") (map (fn (c, (_, [])) => Pretty.str (string_of_const thy c)
haftmann@40726
   991
             | (c, (_, tys)) =>
haftmann@35226
   992
                 (Pretty.block o Pretty.breaks)
haftmann@35226
   993
                    (Pretty.str (string_of_const thy c)
haftmann@35226
   994
                      :: Pretty.str "of"
haftmann@35226
   995
                      :: map (Pretty.quote o Syntax.pretty_typ_global thy) tys)) cos)
haftmann@35226
   996
      );
haftmann@37438
   997
    fun pretty_case (const, ((_, (_, [])), _)) = Pretty.str (string_of_const thy const)
haftmann@37438
   998
      | pretty_case (const, ((_, (_, cos)), _)) = (Pretty.block o Pretty.breaks) [
haftmann@34901
   999
          Pretty.str (string_of_const thy const), Pretty.str "with",
haftmann@34901
  1000
          (Pretty.block o Pretty.commas o map (Pretty.str o string_of_const thy)) cos];
haftmann@35226
  1001
    val functions = the_functions exec
haftmann@24423
  1002
      |> Symtab.dest
haftmann@28695
  1003
      |> (map o apsnd) (snd o fst)
haftmann@24219
  1004
      |> sort (string_ord o pairself fst);
haftmann@35299
  1005
    val datatypes = the_types exec
haftmann@24219
  1006
      |> Symtab.dest
haftmann@35226
  1007
      |> map (fn (tyco, (_, (vs, spec)) :: _) =>
haftmann@35226
  1008
          ((tyco, vs), constructors_of spec))
haftmann@35226
  1009
      |> sort (string_ord o pairself (fst o fst));
haftmann@34901
  1010
    val cases = Symtab.dest ((fst o the_cases o the_exec) thy);
haftmann@34901
  1011
    val undefineds = Symtab.keys ((snd o the_cases o the_exec) thy);
haftmann@24219
  1012
  in
haftmann@24219
  1013
    (Pretty.writeln o Pretty.chunks) [
haftmann@24219
  1014
      Pretty.block (
haftmann@34901
  1015
        Pretty.str "code equations:" :: Pretty.fbrk
haftmann@35226
  1016
        :: (Pretty.fbreaks o map pretty_function) functions
haftmann@24219
  1017
      ),
haftmann@25968
  1018
      Pretty.block (
haftmann@34901
  1019
        Pretty.str "datatypes:" :: Pretty.fbrk
haftmann@35226
  1020
        :: (Pretty.fbreaks o map pretty_typspec) datatypes
haftmann@34901
  1021
      ),
haftmann@34901
  1022
      Pretty.block (
haftmann@34901
  1023
        Pretty.str "cases:" :: Pretty.fbrk
haftmann@34901
  1024
        :: (Pretty.fbreaks o map pretty_case) cases
haftmann@34901
  1025
      ),
haftmann@34901
  1026
      Pretty.block (
haftmann@34901
  1027
        Pretty.str "undefined:" :: Pretty.fbrk
haftmann@34901
  1028
        :: (Pretty.commas o map (Pretty.str o string_of_const thy)) undefineds
haftmann@24219
  1029
      )
haftmann@24219
  1030
    ]
haftmann@24219
  1031
  end;
haftmann@24219
  1032
haftmann@24219
  1033
haftmann@31962
  1034
(** declaring executable ingredients **)
haftmann@31962
  1035
haftmann@33940
  1036
(* constant signatures *)
haftmann@33940
  1037
haftmann@33940
  1038
fun add_type tyco thy =
haftmann@33940
  1039
  case Symtab.lookup ((snd o #types o Type.rep_tsig o Sign.tsig_of) thy) tyco
haftmann@33940
  1040
   of SOME (Type.Abbreviation (vs, _, _)) =>
haftmann@34173
  1041
          (map_exec_purge o map_signatures o apfst)
haftmann@33940
  1042
            (Symtab.update (tyco, length vs)) thy
haftmann@33940
  1043
    | _ => error ("No such type abbreviation: " ^ quote tyco);
haftmann@33940
  1044
haftmann@33940
  1045
fun add_type_cmd s thy = add_type (Sign.intern_type thy s) thy;
haftmann@33940
  1046
haftmann@33940
  1047
fun gen_add_signature prep_const prep_signature (raw_c, raw_ty) thy =
haftmann@33940
  1048
  let
haftmann@33940
  1049
    val c = prep_const thy raw_c;
haftmann@33940
  1050
    val ty = prep_signature thy raw_ty;
haftmann@33940
  1051
    val ty' = expand_signature thy ty;
haftmann@33940
  1052
    val ty'' = Sign.the_const_type thy c;
haftmann@33940
  1053
    val _ = if typ_equiv (ty', ty'') then () else
haftmann@33940
  1054
      error ("Illegal constant signature: " ^ Syntax.string_of_typ_global thy ty);
haftmann@33940
  1055
  in
haftmann@33940
  1056
    thy
haftmann@34173
  1057
    |> (map_exec_purge o map_signatures o apsnd) (Symtab.update (c, ty))
haftmann@33940
  1058
  end;
haftmann@33940
  1059
haftmann@33940
  1060
val add_signature = gen_add_signature (K I) cert_signature;
haftmann@33940
  1061
val add_signature_cmd = gen_add_signature read_const read_signature;
haftmann@33940
  1062
haftmann@33940
  1063
haftmann@31962
  1064
(* code equations *)
haftmann@31962
  1065
haftmann@35226
  1066
fun gen_add_eqn default (raw_thm, proper) thy =
haftmann@33075
  1067
  let
haftmann@35226
  1068
    val thm = Thm.close_derivation raw_thm;
haftmann@35226
  1069
    val c = const_eqn thy thm;
haftmann@37460
  1070
    fun update_subsume thy (thm, proper) eqns = 
haftmann@37460
  1071
      let
haftmann@39811
  1072
        val args_of = snd o chop_while is_Var o rev o snd o strip_comb
haftmann@39791
  1073
          o map_types Type.strip_sorts o fst o Logic.dest_equals o Thm.plain_prop_of;
haftmann@37460
  1074
        val args = args_of thm;
haftmann@37460
  1075
        val incr_idx = Logic.incr_indexes ([], Thm.maxidx_of thm + 1);
haftmann@39794
  1076
        fun matches_args args' =
haftmann@39794
  1077
          let
haftmann@39794
  1078
            val k = length args' - length args
haftmann@39794
  1079
          in if k >= 0
haftmann@39794
  1080
            then Pattern.matchess thy (args, (map incr_idx o drop k) args')
haftmann@39794
  1081
            else false
haftmann@39794
  1082
          end;
haftmann@37460
  1083
        fun drop (thm', proper') = if (proper orelse not proper')
haftmann@37460
  1084
          andalso matches_args (args_of thm') then 
haftmann@37460
  1085
            (warning ("Code generator: dropping subsumed code equation\n" ^
haftmann@37460
  1086
                Display.string_of_thm_global thy thm'); true)
haftmann@37460
  1087
          else false;
haftmann@37460
  1088
      in (thm, proper) :: filter_out drop eqns end;
haftmann@37460
  1089
    fun natural_order thy_ref eqns =
haftmann@37460
  1090
      (eqns, Lazy.lazy (fn () => fold (update_subsume (Theory.deref thy_ref)) eqns []))
haftmann@37460
  1091
    fun add_eqn' true (Default (eqns, _)) =
haftmann@37460
  1092
          Default (natural_order (Theory.check_thy thy) ((thm, proper) :: eqns))
haftmann@37460
  1093
          (*this restores the natural order and drops syntactic redundancies*)
haftmann@39794
  1094
      | add_eqn' true fun_spec = fun_spec
haftmann@39794
  1095
      | add_eqn' false (Eqns eqns) = Eqns (update_subsume thy (thm, proper) eqns)
haftmann@35226
  1096
      | add_eqn' false _ = Eqns [(thm, proper)];
haftmann@35226
  1097
  in change_fun_spec false c (add_eqn' default) thy end;
haftmann@31962
  1098
haftmann@31962
  1099
fun add_eqn thm thy =
haftmann@31962
  1100
  gen_add_eqn false (mk_eqn thy (thm, true)) thy;
haftmann@31962
  1101
haftmann@31962
  1102
fun add_warning_eqn thm thy =
haftmann@31962
  1103
  case mk_eqn_warning thy thm
haftmann@31962
  1104
   of SOME eqn => gen_add_eqn false eqn thy
haftmann@31962
  1105
    | NONE => thy;
haftmann@31962
  1106
haftmann@37425
  1107
fun add_nbe_eqn thm thy =
haftmann@37425
  1108
  gen_add_eqn false (mk_eqn thy (thm, false)) thy;
haftmann@37425
  1109
haftmann@31962
  1110
fun add_default_eqn thm thy =
haftmann@31962
  1111
  case mk_eqn_liberal thy thm
haftmann@31962
  1112
   of SOME eqn => gen_add_eqn true eqn thy
haftmann@31962
  1113
    | NONE => thy;
haftmann@31962
  1114
haftmann@31962
  1115
val add_default_eqn_attribute = Thm.declaration_attribute
haftmann@31962
  1116
  (fn thm => Context.mapping (add_default_eqn thm) I);
haftmann@31962
  1117
val add_default_eqn_attrib = Attrib.internal (K add_default_eqn_attribute);
haftmann@31962
  1118
haftmann@37425
  1119
fun add_nbe_default_eqn thm thy =
haftmann@37425
  1120
  gen_add_eqn true (mk_eqn thy (thm, false)) thy;
haftmann@37425
  1121
haftmann@37425
  1122
val add_nbe_default_eqn_attribute = Thm.declaration_attribute
haftmann@37425
  1123
  (fn thm => Context.mapping (add_nbe_default_eqn thm) I);
haftmann@37425
  1124
val add_nbe_default_eqn_attrib = Attrib.internal (K add_nbe_default_eqn_attribute);
haftmann@37425
  1125
haftmann@35226
  1126
fun add_abs_eqn raw_thm thy =
haftmann@35226
  1127
  let
haftmann@35226
  1128
    val (abs_thm, tyco) = (apfst Thm.close_derivation o mk_abs_eqn thy) raw_thm;
haftmann@35226
  1129
    val c = const_abs_eqn thy abs_thm;
haftmann@35226
  1130
  in change_fun_spec false c (K (Abstr (abs_thm, tyco))) thy end;
haftmann@35226
  1131
haftmann@31962
  1132
fun del_eqn thm thy = case mk_eqn_liberal thy thm
haftmann@35226
  1133
 of SOME (thm, _) => let
haftmann@40758
  1134
        fun del_eqn' (Default _) = empty_fun_spec
haftmann@35226
  1135
          | del_eqn' (Eqns eqns) =
haftmann@35226
  1136
              Eqns (filter_out (fn (thm', _) => Thm.eq_thm_prop (thm, thm')) eqns)
haftmann@35226
  1137
          | del_eqn' spec = spec
haftmann@35226
  1138
      in change_fun_spec true (const_eqn thy thm) del_eqn' thy end
haftmann@31962
  1139
  | NONE => thy;
haftmann@31962
  1140
haftmann@35226
  1141
fun del_eqns c = change_fun_spec true c (K empty_fun_spec);
haftmann@34244
  1142
haftmann@34244
  1143
haftmann@34244
  1144
(* cases *)
haftmann@34244
  1145
haftmann@40758
  1146
fun case_cong thy case_const (num_args, (pos, _)) =
haftmann@37438
  1147
  let
haftmann@37438
  1148
    val ([x, y], ctxt) = Name.variants ["A", "A'"] Name.context;
haftmann@37438
  1149
    val (zs, _) = Name.variants (replicate (num_args - 1) "") ctxt;
haftmann@37438
  1150
    val (ws, vs) = chop pos zs;
haftmann@37448
  1151
    val T = Logic.unvarifyT_global (Sign.the_const_type thy case_const);
wenzelm@40844
  1152
    val Ts = binder_types T;
haftmann@37438
  1153
    val T_cong = nth Ts pos;
haftmann@37438
  1154
    fun mk_prem z = Free (z, T_cong);
haftmann@37438
  1155
    fun mk_concl z = list_comb (Const (case_const, T), map2 (curry Free) (ws @ z :: vs) Ts);
haftmann@37438
  1156
    val (prem, concl) = pairself Logic.mk_equals (pairself mk_prem (x, y), pairself mk_concl (x, y));
haftmann@37521
  1157
    fun tac { context, prems } = Simplifier.rewrite_goals_tac prems
wenzelm@42360
  1158
      THEN ALLGOALS (Proof_Context.fact_tac [Drule.reflexive_thm]);
haftmann@37438
  1159
  in Skip_Proof.prove_global thy (x :: y :: zs) [prem] concl tac end;
haftmann@37438
  1160
haftmann@34244
  1161
fun add_case thm thy =
haftmann@34244
  1162
  let
haftmann@37438
  1163
    val (case_const, (k, case_pats)) = case_cert thm;
haftmann@34244
  1164
    val _ = case filter_out (is_constr thy) case_pats
haftmann@34244
  1165
     of [] => ()
haftmann@34244
  1166
      | cs => error ("Non-constructor(s) in case certificate: " ^ commas (map quote cs));
haftmann@37438
  1167
    val entry = (1 + Int.max (1, length case_pats), (k, case_pats));
haftmann@37438
  1168
  in
haftmann@37438
  1169
    thy
haftmann@37438
  1170
    |> Theory.checkpoint
haftmann@37438
  1171
    |> `(fn thy => case_cong thy case_const entry)
haftmann@37438
  1172
    |-> (fn cong => (map_exec_purge o map_cases o apfst) (Symtab.update (case_const, (entry, cong))))
haftmann@37438
  1173
  end;
haftmann@34244
  1174
haftmann@34244
  1175
fun add_undefined c thy =
haftmann@34244
  1176
  (map_exec_purge o map_cases o apsnd) (Symtab.update (c, ())) thy;
haftmann@34244
  1177
haftmann@34244
  1178
haftmann@35299
  1179
(* types *)
haftmann@34244
  1180
haftmann@35299
  1181
fun register_type (tyco, vs_spec) thy =
haftmann@34244
  1182
  let
haftmann@35226
  1183
    val (old_constrs, some_old_proj) =
haftmann@35299
  1184
      case these (Symtab.lookup ((the_types o the_exec) thy) tyco)
haftmann@35226
  1185
       of (_, (_, Constructors cos)) :: _ => (map fst cos, NONE)
haftmann@36209
  1186
        | (_, (_, Abstractor ((co, _), (proj, _)))) :: _ => ([co], SOME proj)
haftmann@35226
  1187
        | [] => ([], NONE)
haftmann@35226
  1188
    val outdated_funs = case some_old_proj
haftmann@35304
  1189
     of NONE => old_constrs
haftmann@35226
  1190
      | SOME old_proj => Symtab.fold
haftmann@36209
  1191
          (fn (c, ((_, spec), _)) =>
haftmann@36209
  1192
            if member (op =) (the_list (associated_abstype spec)) tyco
haftmann@35226
  1193
            then insert (op =) c else I)
haftmann@35304
  1194
            ((the_functions o the_exec) thy) (old_proj :: old_constrs);
haftmann@34244
  1195
    fun drop_outdated_cases cases = fold Symtab.delete_safe
haftmann@37438
  1196
      (Symtab.fold (fn (c, ((_, (_, cos)), _)) =>
haftmann@35226
  1197
        if exists (member (op =) old_constrs) cos
haftmann@34244
  1198
          then insert (op =) c else I) cases []) cases;
haftmann@34244
  1199
  in
haftmann@34244
  1200
    thy
haftmann@35226
  1201
    |> fold del_eqns outdated_funs
haftmann@34244
  1202
    |> map_exec_purge
haftmann@35226
  1203
        ((map_typs o Symtab.map_default (tyco, [])) (cons (serial (), vs_spec))
haftmann@34244
  1204
        #> (map_cases o apfst) drop_outdated_cases)
haftmann@34244
  1205
  end;
haftmann@34244
  1206
haftmann@35299
  1207
fun unoverload_const_typ thy (c, ty) = (AxClass.unoverload_const thy (c, ty), ty);
haftmann@34244
  1208
haftmann@35299
  1209
structure Datatype_Interpretation =
haftmann@35299
  1210
  Interpretation(type T = string * serial val eq = eq_snd (op =) : T * T -> bool);
haftmann@35299
  1211
haftmann@35299
  1212
fun datatype_interpretation f = Datatype_Interpretation.interpretation
haftmann@40726
  1213
  (fn (tyco, _) => fn thy => f (tyco, fst (get_type thy tyco)) thy);
haftmann@35226
  1214
haftmann@35226
  1215
fun add_datatype proto_constrs thy =
haftmann@35226
  1216
  let
haftmann@35226
  1217
    val constrs = map (unoverload_const_typ thy) proto_constrs;
haftmann@35226
  1218
    val (tyco, (vs, cos)) = constrset_of_consts thy constrs;
haftmann@35226
  1219
  in
haftmann@35226
  1220
    thy
haftmann@35226
  1221
    |> fold (del_eqns o fst) constrs
haftmann@35299
  1222
    |> register_type (tyco, (vs, Constructors cos))
haftmann@35299
  1223
    |> Datatype_Interpretation.data (tyco, serial ())
haftmann@35226
  1224
  end;
haftmann@35226
  1225
haftmann@35226
  1226
fun add_datatype_cmd raw_constrs thy =
haftmann@35226
  1227
  add_datatype (map (read_bare_const thy) raw_constrs) thy;
haftmann@35226
  1228
haftmann@35299
  1229
structure Abstype_Interpretation =
haftmann@35299
  1230
  Interpretation(type T = string * serial val eq = eq_snd (op =) : T * T -> bool);
haftmann@35299
  1231
haftmann@35299
  1232
fun abstype_interpretation f = Abstype_Interpretation.interpretation
haftmann@35299
  1233
  (fn (tyco, _) => fn thy => f (tyco, get_abstype_spec thy tyco) thy);
haftmann@35299
  1234
haftmann@36112
  1235
fun add_abstype proto_thm thy =
haftmann@34244
  1236
  let
haftmann@40726
  1237
    val (tyco, (vs, (abs_ty as (abs, (_, ty)), (rep, cert)))) =
haftmann@36209
  1238
      error_thm (check_abstype_cert thy) proto_thm;
haftmann@35226
  1239
  in
haftmann@35226
  1240
    thy
haftmann@36112
  1241
    |> del_eqns abs
haftmann@36112
  1242
    |> register_type (tyco, (vs, Abstractor (abs_ty, (rep, cert))))
haftmann@36112
  1243
    |> change_fun_spec false rep ((K o Proj)
haftmann@36112
  1244
        (map_types Logic.varifyT_global (mk_proj tyco vs ty abs rep), tyco))
haftmann@36112
  1245
    |> Abstype_Interpretation.data (tyco, serial ())
haftmann@35226
  1246
  end;
haftmann@34244
  1247
haftmann@35226
  1248
haftmann@35226
  1249
(** infrastructure **)
haftmann@34244
  1250
wenzelm@41472
  1251
(* cf. src/HOL/Tools/recfun_codegen.ML *)
haftmann@32070
  1252
wenzelm@33522
  1253
structure Code_Target_Attr = Theory_Data
wenzelm@33522
  1254
(
haftmann@31998
  1255
  type T = (string -> thm -> theory -> theory) option;
haftmann@31998
  1256
  val empty = NONE;
haftmann@31998
  1257
  val extend = I;
wenzelm@41493
  1258
  val merge = merge_options;
haftmann@31998
  1259
);
haftmann@31998
  1260
haftmann@32070
  1261
fun set_code_target_attr f = Code_Target_Attr.map (K (SOME f));
haftmann@32070
  1262
haftmann@32070
  1263
fun code_target_attr prefix thm thy =
haftmann@32070
  1264
  let
haftmann@32070
  1265
    val attr = the_default ((K o K) I) (Code_Target_Attr.get thy);
haftmann@32070
  1266
  in thy |> add_warning_eqn thm |> attr prefix thm end;
haftmann@35226
  1267
haftmann@35226
  1268
haftmann@32070
  1269
(* setup *)
haftmann@31998
  1270
haftmann@31962
  1271
val _ = Context.>> (Context.map_theory
haftmann@31962
  1272
  (let
haftmann@31962
  1273
    fun mk_attribute f = Thm.declaration_attribute (fn thm => Context.mapping (f thm) I);
haftmann@31998
  1274
    val code_attribute_parser =
haftmann@31998
  1275
      Args.del |-- Scan.succeed (mk_attribute del_eqn)
haftmann@31998
  1276
      || Args.$$$ "nbe" |-- Scan.succeed (mk_attribute add_nbe_eqn)
haftmann@36112
  1277
      || Args.$$$ "abstype" |-- Scan.succeed (mk_attribute add_abstype)
haftmann@35226
  1278
      || Args.$$$ "abstract" |-- Scan.succeed (mk_attribute add_abs_eqn)
haftmann@31998
  1279
      || (Args.$$$ "target" |-- Args.colon |-- Args.name >>
haftmann@32070
  1280
           (mk_attribute o code_target_attr))
haftmann@31998
  1281
      || Scan.succeed (mk_attribute add_warning_eqn);
haftmann@31962
  1282
  in
haftmann@35299
  1283
    Datatype_Interpretation.init
haftmann@31998
  1284
    #> Attrib.setup (Binding.name "code") (Scan.lift code_attribute_parser)
haftmann@31998
  1285
        "declare theorems for code generation"
haftmann@31962
  1286
  end));
haftmann@31962
  1287
haftmann@24219
  1288
end; (*struct*)
haftmann@24219
  1289
haftmann@24219
  1290
haftmann@35226
  1291
(* type-safe interfaces for data dependent on executable code *)
haftmann@24219
  1292
haftmann@34173
  1293
functor Code_Data(Data: CODE_DATA_ARGS): CODE_DATA =
haftmann@24219
  1294
struct
haftmann@24219
  1295
haftmann@24219
  1296
type T = Data.T;
haftmann@24219
  1297
exception Data of T;
haftmann@24219
  1298
fun dest (Data x) = x
haftmann@24219
  1299
haftmann@34173
  1300
val kind = Code.declare_data (Data Data.empty);
haftmann@24219
  1301
haftmann@24219
  1302
val data_op = (kind, Data, dest);
haftmann@24219
  1303
haftmann@39397
  1304
fun change_yield (SOME thy) f = Code.change_yield_data data_op thy f
haftmann@39397
  1305
  | change_yield NONE f = f Data.empty
haftmann@39397
  1306
haftmann@39397
  1307
fun change some_thy f = snd (change_yield some_thy (pair () o f));
haftmann@24219
  1308
haftmann@24219
  1309
end;
haftmann@24219
  1310
haftmann@28143
  1311
structure Code : CODE = struct open Code; end;