src/Pure/sign.ML
author clasohm
Fri Jan 27 12:28:05 1995 +0100 (1995-01-27)
changeset 881 d7dcba167ed8
parent 879 27675591cc50
child 901 77795af99315
permissions -rw-r--r--
moved ambiguity_level to Syntax/syntax.ML
wenzelm@19
     1
(*  Title:      Pure/sign.ML
clasohm@0
     2
    ID:         $Id$
wenzelm@251
     3
    Author:     Lawrence C Paulson and Markus Wenzel
clasohm@0
     4
wenzelm@251
     5
The abstract type "sg" of signatures.
clasohm@0
     6
*)
clasohm@0
     7
wenzelm@19
     8
signature SIGN =
clasohm@0
     9
sig
clasohm@0
    10
  structure Symtab: SYMTAB
clasohm@0
    11
  structure Syntax: SYNTAX
wenzelm@251
    12
  structure Type: TYPE
wenzelm@143
    13
  sharing Symtab = Type.Symtab
wenzelm@562
    14
  local open Type Syntax in
wenzelm@251
    15
    type sg
wenzelm@251
    16
    val rep_sg: sg ->
wenzelm@251
    17
      {tsig: type_sig,
wenzelm@251
    18
       const_tab: typ Symtab.table,
wenzelm@386
    19
       syn: syntax,
wenzelm@251
    20
       stamps: string ref list}
wenzelm@251
    21
    val subsig: sg * sg -> bool
wenzelm@251
    22
    val eq_sg: sg * sg -> bool
wenzelm@386
    23
    val is_draft: sg -> bool
wenzelm@386
    24
    val const_type: sg -> string -> typ option
wenzelm@402
    25
    val classes: sg -> class list
wenzelm@583
    26
    val subsort: sg -> sort * sort -> bool
wenzelm@583
    27
    val norm_sort: sg -> sort -> sort
wenzelm@251
    28
    val print_sg: sg -> unit
wenzelm@562
    29
    val pretty_sg: sg -> Pretty.T
wenzelm@251
    30
    val pprint_sg: sg -> pprint_args -> unit
wenzelm@386
    31
    val pretty_term: sg -> term -> Pretty.T
wenzelm@386
    32
    val pretty_typ: sg -> typ -> Pretty.T
wenzelm@620
    33
    val pretty_sort: sort -> Pretty.T
wenzelm@251
    34
    val string_of_term: sg -> term -> string
wenzelm@251
    35
    val string_of_typ: sg -> typ -> string
wenzelm@251
    36
    val pprint_term: sg -> term -> pprint_args -> unit
wenzelm@251
    37
    val pprint_typ: sg -> typ -> pprint_args -> unit
wenzelm@251
    38
    val certify_typ: sg -> typ -> typ
wenzelm@251
    39
    val certify_term: sg -> term -> term * typ * int
wenzelm@251
    40
    val read_typ: sg * (indexname -> sort option) -> string -> typ
wenzelm@562
    41
    val infer_types: sg -> (indexname -> typ option) ->
clasohm@623
    42
      (indexname -> sort option) -> bool -> term list * typ ->
clasohm@623
    43
      int * term * (indexname * typ) list
wenzelm@562
    44
    val add_classes: (class * class list) list -> sg -> sg
wenzelm@421
    45
    val add_classrel: (class * class) list -> sg -> sg
wenzelm@386
    46
    val add_defsort: sort -> sg -> sg
wenzelm@386
    47
    val add_types: (string * int * mixfix) list -> sg -> sg
wenzelm@386
    48
    val add_tyabbrs: (string * string list * string * mixfix) list -> sg -> sg
wenzelm@386
    49
    val add_tyabbrs_i: (string * string list * typ * mixfix) list -> sg -> sg
wenzelm@386
    50
    val add_arities: (string * sort list * sort) list -> sg -> sg
wenzelm@386
    51
    val add_consts: (string * string * mixfix) list -> sg -> sg
wenzelm@386
    52
    val add_consts_i: (string * typ * mixfix) list -> sg -> sg
wenzelm@386
    53
    val add_syntax: (string * string * mixfix) list -> sg -> sg
wenzelm@386
    54
    val add_syntax_i: (string * typ * mixfix) list -> sg -> sg
wenzelm@386
    55
    val add_trfuns:
wenzelm@386
    56
      (string * (ast list -> ast)) list *
wenzelm@386
    57
      (string * (term list -> term)) list *
wenzelm@386
    58
      (string * (term list -> term)) list *
wenzelm@386
    59
      (string * (ast list -> ast)) list -> sg -> sg
wenzelm@386
    60
    val add_trrules: xrule list -> sg -> sg
wenzelm@386
    61
    val add_name: string -> sg -> sg
wenzelm@386
    62
    val make_draft: sg -> sg
wenzelm@251
    63
    val merge: sg * sg -> sg
wenzelm@251
    64
    val pure: sg
wenzelm@386
    65
    val const_of_class: class -> string
wenzelm@386
    66
    val class_of_const: string -> class
wenzelm@251
    67
  end
clasohm@0
    68
end;
clasohm@0
    69
wenzelm@251
    70
functor SignFun(structure Syntax: SYNTAX and Type: TYPE): SIGN =
wenzelm@143
    71
struct
clasohm@0
    72
clasohm@0
    73
structure Symtab = Type.Symtab;
clasohm@0
    74
structure Syntax = Syntax;
wenzelm@386
    75
structure BasicSyntax: BASIC_SYNTAX = Syntax;
wenzelm@251
    76
structure Pretty = Syntax.Pretty;
wenzelm@251
    77
structure Type = Type;
wenzelm@562
    78
open BasicSyntax Type;
clasohm@0
    79
wenzelm@143
    80
wenzelm@251
    81
(** datatype sg **)
wenzelm@251
    82
wenzelm@251
    83
(*the "ref" in stamps ensures that no two signatures are identical -- it is
wenzelm@251
    84
  impossible to forge a signature*)
wenzelm@143
    85
wenzelm@19
    86
datatype sg =
wenzelm@143
    87
  Sg of {
wenzelm@251
    88
    tsig: type_sig,                 (*order-sorted signature of types*)
wenzelm@143
    89
    const_tab: typ Symtab.table,    (*types of constants*)
wenzelm@143
    90
    syn: Syntax.syntax,             (*syntax for parsing and printing*)
wenzelm@143
    91
    stamps: string ref list};       (*unique theory indentifier*)
clasohm@0
    92
clasohm@0
    93
fun rep_sg (Sg args) = args;
wenzelm@402
    94
val tsig_of = #tsig o rep_sg;
clasohm@0
    95
nipkow@206
    96
wenzelm@402
    97
(* stamps *)
wenzelm@402
    98
wenzelm@386
    99
fun is_draft (Sg {stamps = ref "#" :: _, ...}) = true
wenzelm@386
   100
  | is_draft _ = false;
wenzelm@386
   101
wenzelm@251
   102
fun subsig (Sg {stamps = s1, ...}, Sg {stamps = s2, ...}) = s1 subset s2;
clasohm@0
   103
wenzelm@266
   104
fun eq_sg (Sg {stamps = s1, ...}, Sg {stamps = s2, ...}) = eq_set (s1, s2);
clasohm@0
   105
clasohm@0
   106
wenzelm@402
   107
(* consts *)
wenzelm@402
   108
wenzelm@386
   109
fun const_type (Sg {const_tab, ...}) c =
wenzelm@386
   110
  Symtab.lookup (const_tab, c);
wenzelm@386
   111
wenzelm@386
   112
wenzelm@620
   113
(* classes and sorts *)
wenzelm@402
   114
wenzelm@402
   115
val classes = #classes o Type.rep_tsig o tsig_of;
wenzelm@402
   116
wenzelm@402
   117
val subsort = Type.subsort o tsig_of;
wenzelm@402
   118
val norm_sort = Type.norm_sort o tsig_of;
wenzelm@402
   119
wenzelm@620
   120
fun pretty_sort [c] = Pretty.str c
wenzelm@620
   121
  | pretty_sort cs = Pretty.str_list "{" "}" cs;
wenzelm@620
   122
wenzelm@402
   123
clasohm@0
   124
wenzelm@251
   125
(** print signature **)
wenzelm@251
   126
wenzelm@386
   127
val stamp_names = rev o map !;
wenzelm@386
   128
wenzelm@251
   129
fun print_sg sg =
wenzelm@251
   130
  let
wenzelm@251
   131
    fun prt_typ syn ty = Pretty.quote (Syntax.pretty_typ syn ty);
wenzelm@251
   132
wenzelm@251
   133
    fun pretty_subclass (cl, cls) = Pretty.block
wenzelm@251
   134
      [Pretty.str (cl ^ " <"), Pretty.brk 1, pretty_sort cls];
wenzelm@251
   135
wenzelm@251
   136
    fun pretty_default cls = Pretty.block
wenzelm@251
   137
      [Pretty.str "default:", Pretty.brk 1, pretty_sort cls];
wenzelm@251
   138
wenzelm@251
   139
    fun pretty_arg (ty, n) = Pretty.str (ty ^ " " ^ string_of_int n);
wenzelm@251
   140
wenzelm@251
   141
    fun pretty_abbr syn (ty, (vs, rhs)) = Pretty.block
wenzelm@620
   142
      [prt_typ syn (Type (ty, map (fn v => TVar ((v, 0), [])) vs)),
wenzelm@251
   143
        Pretty.str " =", Pretty.brk 1, prt_typ syn rhs];
wenzelm@251
   144
wenzelm@251
   145
    fun pretty_arity ty (cl, []) = Pretty.block
wenzelm@251
   146
          [Pretty.str (ty ^ " ::"), Pretty.brk 1, Pretty.str cl]
wenzelm@251
   147
      | pretty_arity ty (cl, srts) = Pretty.block
wenzelm@251
   148
          [Pretty.str (ty ^ " ::"), Pretty.brk 1,
wenzelm@251
   149
            Pretty.list "(" ")" (map pretty_sort srts),
wenzelm@251
   150
            Pretty.brk 1, Pretty.str cl];
wenzelm@251
   151
wenzelm@251
   152
    fun pretty_coreg (ty, ars) = map (pretty_arity ty) ars;
wenzelm@251
   153
wenzelm@251
   154
    fun pretty_const syn (c, ty) = Pretty.block
wenzelm@266
   155
      [Pretty.str (quote c ^ " ::"), Pretty.brk 1, prt_typ syn ty];
wenzelm@251
   156
wenzelm@251
   157
wenzelm@251
   158
    val Sg {tsig, const_tab, syn, stamps} = sg;
wenzelm@251
   159
    val {classes, subclass, default, args, abbrs, coreg} = rep_tsig tsig;
wenzelm@251
   160
  in
wenzelm@386
   161
    Pretty.writeln (Pretty.strs ("stamps:" :: stamp_names stamps));
wenzelm@251
   162
    Pretty.writeln (Pretty.strs ("classes:" :: classes));
wenzelm@251
   163
    Pretty.writeln (Pretty.big_list "subclass:" (map pretty_subclass subclass));
wenzelm@251
   164
    Pretty.writeln (pretty_default default);
wenzelm@251
   165
    Pretty.writeln (Pretty.big_list "types:" (map pretty_arg args));
wenzelm@251
   166
    Pretty.writeln (Pretty.big_list "abbrs:" (map (pretty_abbr syn) abbrs));
wenzelm@251
   167
    Pretty.writeln (Pretty.big_list "coreg:" (flat (map pretty_coreg coreg)));
wenzelm@251
   168
    Pretty.writeln (Pretty.big_list "consts:"
wenzelm@386
   169
      (map (pretty_const syn) (Symtab.dest const_tab)))
wenzelm@251
   170
  end;
wenzelm@251
   171
wenzelm@251
   172
wenzelm@562
   173
fun pretty_sg (Sg {stamps, ...}) =
wenzelm@562
   174
  Pretty.str_list "{" "}" (stamp_names stamps);
wenzelm@562
   175
wenzelm@562
   176
val pprint_sg = Pretty.pprint o pretty_sg;
wenzelm@251
   177
wenzelm@251
   178
wenzelm@251
   179
wenzelm@251
   180
(** pretty printing of terms and types **)
wenzelm@251
   181
wenzelm@251
   182
fun pretty_term (Sg {syn, ...}) = Syntax.pretty_term syn;
wenzelm@251
   183
fun pretty_typ (Sg {syn, ...}) = Syntax.pretty_typ syn;
wenzelm@251
   184
wenzelm@251
   185
fun string_of_term (Sg {syn, ...}) = Syntax.string_of_term syn;
wenzelm@251
   186
fun string_of_typ (Sg {syn, ...}) = Syntax.string_of_typ syn;
wenzelm@251
   187
wenzelm@251
   188
fun pprint_term sg = Pretty.pprint o Pretty.quote o (pretty_term sg);
wenzelm@251
   189
fun pprint_typ sg = Pretty.pprint o Pretty.quote o (pretty_typ sg);
clasohm@0
   190
clasohm@0
   191
wenzelm@169
   192
wenzelm@562
   193
(** read types **)  (*exception ERROR*)
wenzelm@562
   194
wenzelm@562
   195
fun err_in_type s =
wenzelm@562
   196
  error ("The error(s) above occurred in type " ^ quote s);
wenzelm@562
   197
wenzelm@562
   198
fun read_raw_typ syn tsig sort_of str =
wenzelm@562
   199
  Syntax.read_typ syn (fn x => if_none (sort_of x) (defaultS tsig)) str
wenzelm@562
   200
    handle ERROR => err_in_type str;
wenzelm@562
   201
wenzelm@562
   202
(*read and certify typ wrt a signature*)
wenzelm@562
   203
fun read_typ (Sg {tsig, syn, ...}, sort_of) str =
wenzelm@562
   204
  cert_typ tsig (read_raw_typ syn tsig sort_of str)
wenzelm@562
   205
    handle TYPE (msg, _, _) => (writeln msg; err_in_type str);
wenzelm@562
   206
wenzelm@562
   207
wenzelm@562
   208
wenzelm@386
   209
(** certify types and terms **)   (*exception TYPE*)
wenzelm@251
   210
wenzelm@251
   211
fun certify_typ (Sg {tsig, ...}) ty = cert_typ tsig ty;
wenzelm@251
   212
wenzelm@251
   213
wenzelm@386
   214
fun mapfilt_atoms f (Abs (_, _, t)) = mapfilt_atoms f t
wenzelm@386
   215
  | mapfilt_atoms f (t $ u) = mapfilt_atoms f t @ mapfilt_atoms f u
wenzelm@386
   216
  | mapfilt_atoms f a = (case f a of Some y => [y] | None => []);
clasohm@0
   217
wenzelm@386
   218
fun certify_term (sg as Sg {tsig, ...}) tm =
wenzelm@251
   219
  let
wenzelm@251
   220
    fun valid_const a T =
wenzelm@386
   221
      (case const_type sg a of
wenzelm@251
   222
        Some U => typ_instance (tsig, T, U)
wenzelm@251
   223
      | _ => false);
wenzelm@169
   224
wenzelm@251
   225
    fun atom_err (Const (a, T)) =
wenzelm@251
   226
          if valid_const a T then None
wenzelm@251
   227
          else Some ("Illegal type for constant " ^ quote a ^ " :: " ^
wenzelm@251
   228
            quote (string_of_typ sg T))
wenzelm@251
   229
      | atom_err (Var ((x, i), _)) =
wenzelm@251
   230
          if i < 0 then Some ("Negative index for Var " ^ quote x) else None
wenzelm@251
   231
      | atom_err _ = None;
wenzelm@251
   232
wenzelm@251
   233
    val norm_tm =
wenzelm@251
   234
      (case it_term_types (typ_errors tsig) (tm, []) of
wenzelm@251
   235
        [] => map_term_types (norm_typ tsig) tm
wenzelm@251
   236
      | errs => raise_type (cat_lines errs) [] [tm]);
wenzelm@251
   237
  in
wenzelm@386
   238
    (case mapfilt_atoms atom_err norm_tm of
wenzelm@251
   239
      [] => (norm_tm, type_of norm_tm, maxidx_of_term norm_tm)
wenzelm@251
   240
    | errs => raise_type (cat_lines errs) [] [norm_tm])
wenzelm@251
   241
  end;
wenzelm@251
   242
wenzelm@251
   243
wenzelm@251
   244
wenzelm@583
   245
(** infer_types **)         (*exception ERROR*)
wenzelm@251
   246
clasohm@623
   247
fun infer_types sg types sorts print_msg (ts, T) =
wenzelm@251
   248
  let
wenzelm@562
   249
    val Sg {tsig, ...} = sg;
wenzelm@562
   250
    val show_typ = string_of_typ sg;
wenzelm@562
   251
    val show_term = string_of_term sg;
wenzelm@169
   252
wenzelm@562
   253
    fun term_err [] = ""
wenzelm@562
   254
      | term_err [t] = "\nInvolving this term:\n" ^ show_term t
clasohm@623
   255
      | term_err ts = 
clasohm@623
   256
          "\nInvolving these terms:\n" ^ cat_lines (map show_term ts);
wenzelm@562
   257
lcp@679
   258
    fun exn_type_msg (msg, Ts, ts) =
lcp@679
   259
	msg ^ "\nType checking error: " ^ msg ^ "\n" ^
lcp@679
   260
	cat_lines (map show_typ Ts) ^ term_err ts ^ "\n";
lcp@679
   261
wenzelm@562
   262
    val T' = certify_typ sg T
lcp@679
   263
      handle TYPE arg => error (exn_type_msg arg);
clasohm@623
   264
clasohm@623
   265
    val ct = const_type sg;
clasohm@623
   266
clasohm@623
   267
    fun process_terms (t::ts) (idx, infrd_t, tye) msg n =
clasohm@623
   268
         let fun mk_some (x, y) = (Some x, Some y);
clasohm@623
   269
clasohm@623
   270
             val ((infrd_t', tye'), msg') = 
clasohm@623
   271
              (mk_some (Type.infer_types (tsig, ct, types, sorts, T', t)), msg)
lcp@679
   272
              handle TYPE arg => ((None, None), exn_type_msg arg)
clasohm@623
   273
clasohm@623
   274
             val old_show_brackets = !show_brackets;
clasohm@623
   275
clasohm@623
   276
             val _ = (show_brackets := true);
clasohm@623
   277
clasohm@623
   278
             val msg'' = 
clasohm@623
   279
               if is_none idx then (if is_none infrd_t' then msg' else "")
clasohm@623
   280
               else if is_none infrd_t' then "" 
clasohm@623
   281
               else (if msg' = "" then 
clasohm@623
   282
                "Error: More than one term is type correct:\n" ^
clasohm@623
   283
                (show_term (the infrd_t)) else msg') ^ "\n" ^ 
clasohm@623
   284
                (show_term (the infrd_t')) ^ "\n";
clasohm@623
   285
clasohm@623
   286
             val _ = (show_brackets := old_show_brackets);
clasohm@623
   287
         in if is_none infrd_t' then
clasohm@623
   288
              process_terms ts (idx, infrd_t, tye) msg'' (n+1)
clasohm@623
   289
            else
clasohm@623
   290
              process_terms ts (Some n, infrd_t', tye') msg'' (n+1)
clasohm@623
   291
         end
clasohm@623
   292
      | process_terms [] (idx, infrd_t, tye) msg _ = 
clasohm@623
   293
          if msg = "" then (the idx, the infrd_t, the tye) 
clasohm@881
   294
          else
clasohm@881
   295
            (if length ts <= !Syntax.ambiguity_level then
clasohm@881
   296
                                                      (*no warning shown yet?*)
clasohm@881
   297
               writeln "Warning: Currently parsed input \
clasohm@881
   298
                       \produces more than one parse tree.\n\
clasohm@881
   299
                       \For more information lower Syntax.ambiguity_level."
clasohm@881
   300
             else ();
clasohm@881
   301
             error msg)
clasohm@623
   302
clasohm@623
   303
    val (idx, infrd_t, tye) = process_terms ts (None, None, None) "" 0;
clasohm@881
   304
  in if print_msg andalso length ts > !Syntax.ambiguity_level then
clasohm@623
   305
       writeln "Fortunately, only one parse tree is type correct.\n\
clasohm@623
   306
         \It helps (speed!) if you disambiguate your grammar or your input."
clasohm@623
   307
     else ();
clasohm@623
   308
     (idx, infrd_t, tye)
clasohm@623
   309
  end;
wenzelm@251
   310
wenzelm@251
   311
wenzelm@251
   312
clasohm@623
   313
(** extend signature **)    (*exception ERROR*)
clasohm@623
   314
wenzelm@620
   315
(** signature extension functions **)  (*exception ERROR*)
wenzelm@386
   316
wenzelm@386
   317
fun decls_of name_of mfixs =
wenzelm@386
   318
  map (fn (x, y, mx) => (name_of x mx, y)) mfixs;
wenzelm@386
   319
wenzelm@386
   320
wenzelm@386
   321
(* add default sort *)
wenzelm@386
   322
wenzelm@386
   323
fun ext_defsort (syn, tsig, ctab) defsort =
wenzelm@386
   324
  (syn, ext_tsig_defsort tsig defsort, ctab);
wenzelm@386
   325
wenzelm@386
   326
wenzelm@386
   327
(* add type constructors *)
wenzelm@386
   328
wenzelm@386
   329
fun ext_types (syn, tsig, ctab) types =
wenzelm@386
   330
  (Syntax.extend_type_gram syn types,
wenzelm@562
   331
    ext_tsig_types tsig (decls_of Syntax.type_name types),
wenzelm@386
   332
    ctab);
wenzelm@386
   333
wenzelm@386
   334
wenzelm@386
   335
(* add type abbreviations *)
wenzelm@386
   336
wenzelm@386
   337
fun read_abbr syn tsig (t, vs, rhs_src) =
wenzelm@386
   338
  (t, vs, read_raw_typ syn tsig (K None) rhs_src)
wenzelm@386
   339
    handle ERROR => error ("in type abbreviation " ^ t);
wenzelm@386
   340
wenzelm@386
   341
fun ext_abbrs rd_abbr (syn, tsig, ctab) abbrs =
wenzelm@386
   342
  let
wenzelm@386
   343
    fun mfix_of (t, vs, _, mx) = (t, length vs, mx);
wenzelm@386
   344
    val syn1 = Syntax.extend_type_gram syn (map mfix_of abbrs);
wenzelm@386
   345
wenzelm@386
   346
    fun decl_of (t, vs, rhs, mx) =
wenzelm@562
   347
      rd_abbr syn1 tsig (Syntax.type_name t mx, vs, rhs);
wenzelm@386
   348
  in
wenzelm@386
   349
    (syn1, ext_tsig_abbrs tsig (map decl_of abbrs), ctab)
wenzelm@386
   350
  end;
wenzelm@386
   351
wenzelm@386
   352
val ext_tyabbrs_i = ext_abbrs (K (K I));
wenzelm@386
   353
val ext_tyabbrs = ext_abbrs read_abbr;
wenzelm@386
   354
wenzelm@386
   355
wenzelm@386
   356
(* add type arities *)
wenzelm@386
   357
wenzelm@386
   358
fun ext_arities (syn, tsig, ctab) arities =
wenzelm@386
   359
  let
wenzelm@386
   360
    val tsig1 = ext_tsig_arities tsig arities;
wenzelm@386
   361
    val log_types = logical_types tsig1;
wenzelm@386
   362
  in
wenzelm@386
   363
    (Syntax.extend_log_types syn log_types, tsig1, ctab)
wenzelm@386
   364
  end;
wenzelm@386
   365
wenzelm@386
   366
wenzelm@386
   367
(* add term constants and syntax *)
wenzelm@386
   368
wenzelm@386
   369
fun err_in_const c =
wenzelm@386
   370
  error ("in declaration of constant " ^ quote c);
wenzelm@386
   371
wenzelm@386
   372
fun err_dup_consts cs =
wenzelm@386
   373
  error ("Duplicate declaration of constant(s) " ^ commas_quote cs);
wenzelm@386
   374
wenzelm@251
   375
wenzelm@386
   376
fun read_const syn tsig (c, ty_src, mx) =
wenzelm@386
   377
  (c, read_raw_typ syn tsig (K None) ty_src, mx)
wenzelm@562
   378
    handle ERROR => err_in_const (Syntax.const_name c mx);
wenzelm@386
   379
wenzelm@386
   380
fun ext_cnsts rd_const syn_only (syn, tsig, ctab) raw_consts =
wenzelm@386
   381
  let
wenzelm@620
   382
    fun prep_const (c, ty, mx) = (c, varifyT (cert_typ tsig (no_tvars ty)), mx)
wenzelm@562
   383
      handle TYPE (msg, _, _) => (writeln msg; err_in_const (Syntax.const_name c mx));
wenzelm@386
   384
wenzelm@386
   385
    val consts = map (prep_const o rd_const syn tsig) raw_consts;
wenzelm@386
   386
    val decls =
wenzelm@386
   387
      if syn_only then []
wenzelm@562
   388
      else filter_out (equal "" o fst) (decls_of Syntax.const_name consts);
wenzelm@386
   389
  in
wenzelm@386
   390
    (Syntax.extend_const_gram syn consts, tsig,
wenzelm@386
   391
      Symtab.extend_new (ctab, decls)
wenzelm@386
   392
        handle Symtab.DUPS cs => err_dup_consts cs)
wenzelm@386
   393
  end;
wenzelm@386
   394
wenzelm@386
   395
val ext_consts_i = ext_cnsts (K (K I)) false;
wenzelm@386
   396
val ext_consts = ext_cnsts read_const false;
wenzelm@386
   397
val ext_syntax_i = ext_cnsts (K (K I)) true;
wenzelm@386
   398
val ext_syntax = ext_cnsts read_const true;
wenzelm@386
   399
wenzelm@386
   400
wenzelm@386
   401
(* add type classes *)
wenzelm@386
   402
wenzelm@386
   403
fun const_of_class c = c ^ "_class";
wenzelm@386
   404
wenzelm@386
   405
fun class_of_const c_class =
wenzelm@386
   406
  let
wenzelm@386
   407
    val c = implode (take (size c_class - 6, explode c_class));
wenzelm@386
   408
  in
wenzelm@386
   409
    if const_of_class c = c_class then c
wenzelm@386
   410
    else raise_term ("class_of_const: bad name " ^ quote c_class) []
wenzelm@386
   411
  end;
wenzelm@386
   412
wenzelm@386
   413
wenzelm@386
   414
fun ext_classes (syn, tsig, ctab) classes =
wenzelm@386
   415
  let
wenzelm@562
   416
    val names = map fst classes;
wenzelm@386
   417
    val consts =
wenzelm@386
   418
      map (fn c => (const_of_class c, a_itselfT --> propT, NoSyn)) names;
wenzelm@386
   419
  in
wenzelm@386
   420
    ext_consts_i
wenzelm@386
   421
      (Syntax.extend_consts syn names, ext_tsig_classes tsig classes, ctab)
wenzelm@386
   422
      consts
wenzelm@386
   423
  end;
wenzelm@386
   424
wenzelm@386
   425
wenzelm@421
   426
(* add to subclass relation *)
wenzelm@421
   427
wenzelm@421
   428
fun ext_classrel (syn, tsig, ctab) pairs =
wenzelm@421
   429
  (syn, ext_tsig_subclass tsig pairs, ctab);
wenzelm@421
   430
wenzelm@421
   431
wenzelm@386
   432
(* add syntactic translations *)
wenzelm@386
   433
wenzelm@386
   434
fun ext_trfuns (syn, tsig, ctab) trfuns =
wenzelm@386
   435
  (Syntax.extend_trfuns syn trfuns, tsig, ctab);
wenzelm@386
   436
wenzelm@386
   437
fun ext_trrules (syn, tsig, ctab) xrules =
clasohm@865
   438
  (Syntax.extend_trrules syn xrules, tsig, ctab);
wenzelm@386
   439
wenzelm@386
   440
wenzelm@386
   441
(* build signature *)
wenzelm@386
   442
wenzelm@386
   443
fun ext_stamps stamps name =
wenzelm@386
   444
  let
wenzelm@386
   445
    val stmps = (case stamps of ref "#" :: ss => ss | ss => ss);
wenzelm@386
   446
  in
wenzelm@386
   447
    if exists (equal name o !) stmps then
wenzelm@386
   448
      error ("Theory already contains a " ^ quote name ^ " component")
wenzelm@402
   449
    else ref name :: stmps
wenzelm@386
   450
  end;
wenzelm@386
   451
wenzelm@386
   452
fun make_sign (syn, tsig, ctab) stamps name =
wenzelm@386
   453
  Sg {tsig = tsig, const_tab = ctab, syn = syn,
wenzelm@386
   454
    stamps = ext_stamps stamps name};
wenzelm@386
   455
wenzelm@386
   456
fun extend_sign extfun name decls (Sg {tsig, const_tab, syn, stamps}) =
wenzelm@386
   457
  make_sign (extfun (syn, tsig, const_tab) decls) stamps name;
wenzelm@386
   458
wenzelm@386
   459
wenzelm@386
   460
(* the external interfaces *)
wenzelm@386
   461
wenzelm@386
   462
val add_classes   = extend_sign ext_classes "#";
wenzelm@421
   463
val add_classrel  = extend_sign ext_classrel "#";
wenzelm@386
   464
val add_defsort   = extend_sign ext_defsort "#";
wenzelm@386
   465
val add_types     = extend_sign ext_types "#";
wenzelm@386
   466
val add_tyabbrs   = extend_sign ext_tyabbrs "#";
wenzelm@386
   467
val add_tyabbrs_i = extend_sign ext_tyabbrs_i "#";
wenzelm@386
   468
val add_arities   = extend_sign ext_arities "#";
wenzelm@386
   469
val add_consts    = extend_sign ext_consts "#";
wenzelm@386
   470
val add_consts_i  = extend_sign ext_consts_i "#";
wenzelm@386
   471
val add_syntax    = extend_sign ext_syntax "#";
wenzelm@386
   472
val add_syntax_i  = extend_sign ext_syntax_i "#";
wenzelm@386
   473
val add_trfuns    = extend_sign ext_trfuns "#";
wenzelm@386
   474
val add_trrules   = extend_sign ext_trrules "#";
wenzelm@386
   475
wenzelm@386
   476
fun add_name name sg = extend_sign K name () sg;
wenzelm@386
   477
val make_draft = add_name "#";
wenzelm@386
   478
wenzelm@386
   479
wenzelm@386
   480
wenzelm@620
   481
(** merge signatures **)    (*exception TERM*) (*exception ERROR (* FIXME *)*)
wenzelm@143
   482
wenzelm@251
   483
fun merge (sg1, sg2) =
wenzelm@251
   484
  if subsig (sg2, sg1) then sg1
wenzelm@251
   485
  else if subsig (sg1, sg2) then sg2
wenzelm@386
   486
  else if is_draft sg1 orelse is_draft sg2 then
wenzelm@386
   487
    raise_term "Illegal merge of draft signatures" []
wenzelm@251
   488
  else
wenzelm@251
   489
    (*neither is union already; must form union*)
wenzelm@251
   490
    let
wenzelm@251
   491
      val Sg {tsig = tsig1, const_tab = const_tab1, syn = syn1,
wenzelm@251
   492
        stamps = stamps1} = sg1;
wenzelm@251
   493
      val Sg {tsig = tsig2, const_tab = const_tab2, syn = syn2,
wenzelm@251
   494
        stamps = stamps2} = sg2;
wenzelm@251
   495
wenzelm@386
   496
wenzelm@402
   497
      val stamps = merge_rev_lists stamps1 stamps2;
wenzelm@402
   498
      val _ =
wenzelm@402
   499
        (case duplicates (stamp_names stamps) of
wenzelm@402
   500
          [] => ()
wenzelm@402
   501
        | dups => raise_term ("Attempt to merge different versions of theories "
wenzelm@402
   502
            ^ commas_quote dups) []);
wenzelm@402
   503
wenzelm@251
   504
      val tsig = merge_tsigs (tsig1, tsig2);
wenzelm@251
   505
wenzelm@251
   506
      val const_tab = Symtab.merge (op =) (const_tab1, const_tab2)
wenzelm@386
   507
        handle Symtab.DUPS cs =>
wenzelm@386
   508
          raise_term ("Incompatible types for constant(s) " ^ commas_quote cs) [];
wenzelm@386
   509
wenzelm@386
   510
      val syn = Syntax.merge_syntaxes syn1 syn2;
wenzelm@251
   511
    in
wenzelm@251
   512
      Sg {tsig = tsig, const_tab = const_tab, syn = syn, stamps = stamps}
wenzelm@251
   513
    end;
wenzelm@143
   514
clasohm@0
   515
clasohm@0
   516
wenzelm@251
   517
(** the Pure signature **)
clasohm@0
   518
wenzelm@386
   519
val pure =
clasohm@763
   520
  make_sign (Syntax.pure_syn, tsig0, Symtab.null) [] "#"
wenzelm@410
   521
  |> add_types
wenzelm@386
   522
   (("fun", 2, NoSyn) ::
wenzelm@386
   523
    ("prop", 0, NoSyn) ::
wenzelm@386
   524
    ("itself", 1, NoSyn) ::
wenzelm@562
   525
    Syntax.pure_types)
wenzelm@562
   526
  |> add_classes [(logicC, [])]
wenzelm@410
   527
  |> add_defsort logicS
wenzelm@410
   528
  |> add_arities
wenzelm@386
   529
   [("fun", [logicS, logicS], logicS),
wenzelm@386
   530
    ("prop", [], logicS),
wenzelm@386
   531
    ("itself", [logicS], logicS)]
wenzelm@562
   532
  |> add_syntax Syntax.pure_syntax
wenzelm@410
   533
  |> add_trfuns Syntax.pure_trfuns
wenzelm@410
   534
  |> add_consts
wenzelm@386
   535
   [("==", "['a::{}, 'a] => prop", Mixfix ("(_ ==/ _)", [3, 2], 2)),
wenzelm@386
   536
    ("=?=", "['a::{}, 'a] => prop", Mixfix ("(_ =?=/ _)", [3, 2], 2)),
wenzelm@386
   537
    ("==>", "[prop, prop] => prop", Mixfix ("(_ ==>/ _)", [2, 1], 1)),
clasohm@865
   538
    ("all", "('a => prop) => prop", Binder ("!!", 0, 0)),
wenzelm@573
   539
    ("TYPE", "'a itself", NoSyn)]
wenzelm@410
   540
  |> add_name "Pure";
clasohm@0
   541
clasohm@0
   542
clasohm@0
   543
end;