src/Pure/Tools/find_theorems.ML
author wenzelm
Fri Feb 27 15:46:22 2009 +0100 (2009-02-27)
changeset 30142 8d6145694bb5
parent 29882 src/Pure/Isar/find_theorems.ML@29154e67731d
child 30143 98a986b02022
permissions -rw-r--r--
moved find_theorems.ML and find_consts.ML to Pure/Tools, collecting main implementation in one place each;
wenzelm@16033
     1
(*  Title:      Pure/Isar/find_theorems.ML
wenzelm@26283
     2
    Author:     Rafal Kolanski and Gerwin Klein, NICTA
wenzelm@16033
     3
wenzelm@16033
     4
Retrieve theorems from proof context.
wenzelm@16033
     5
*)
wenzelm@16033
     6
wenzelm@16033
     7
signature FIND_THEOREMS =
wenzelm@16033
     8
sig
wenzelm@25992
     9
  val limit: int ref
kleing@29857
    10
  val tac_limit: int ref
kleing@29857
    11
wenzelm@16036
    12
  datatype 'term criterion =
kleing@29857
    13
    Name of string | Intro | Elim | Dest | Solves | Simp of 'term |
kleing@29857
    14
    Pattern of 'term
kleing@29857
    15
kleing@29857
    16
  val find_theorems: Proof.context -> thm option -> bool ->
kleing@29857
    17
    (bool * string criterion) list -> (Facts.ref * thm) list
kleing@29857
    18
kleing@29857
    19
  val print_theorems: Proof.context -> thm option -> int option -> bool ->
wenzelm@16036
    20
    (bool * string criterion) list -> unit
wenzelm@16033
    21
end;
wenzelm@16033
    22
wenzelm@16033
    23
structure FindTheorems: FIND_THEOREMS =
wenzelm@16033
    24
struct
wenzelm@16033
    25
wenzelm@16033
    26
(** search criteria **)
wenzelm@16033
    27
wenzelm@16036
    28
datatype 'term criterion =
kleing@29857
    29
  Name of string | Intro | Elim | Dest | Solves | Simp of 'term |
kleing@29857
    30
  Pattern of 'term;
wenzelm@16036
    31
wenzelm@16036
    32
fun read_criterion _ (Name name) = Name name
wenzelm@16036
    33
  | read_criterion _ Intro = Intro
wenzelm@16036
    34
  | read_criterion _ Elim = Elim
wenzelm@16036
    35
  | read_criterion _ Dest = Dest
kleing@29857
    36
  | read_criterion _ Solves = Solves
wenzelm@24683
    37
  | read_criterion ctxt (Simp str) = Simp (ProofContext.read_term_pattern ctxt str)
wenzelm@24683
    38
  | read_criterion ctxt (Pattern str) = Pattern (ProofContext.read_term_pattern ctxt str);
wenzelm@16033
    39
wenzelm@16036
    40
fun pretty_criterion ctxt (b, c) =
wenzelm@16036
    41
  let
wenzelm@16036
    42
    fun prfx s = if b then s else "-" ^ s;
wenzelm@16036
    43
  in
wenzelm@16036
    44
    (case c of
wenzelm@16036
    45
      Name name => Pretty.str (prfx "name: " ^ quote name)
wenzelm@16036
    46
    | Intro => Pretty.str (prfx "intro")
wenzelm@16036
    47
    | Elim => Pretty.str (prfx "elim")
wenzelm@16036
    48
    | Dest => Pretty.str (prfx "dest")
kleing@29857
    49
    | Solves => Pretty.str (prfx "solves")
kleing@16088
    50
    | Simp pat => Pretty.block [Pretty.str (prfx "simp:"), Pretty.brk 1,
wenzelm@24920
    51
        Pretty.quote (Syntax.pretty_term ctxt (Term.show_dummy_patterns pat))]
wenzelm@16036
    52
    | Pattern pat => Pretty.enclose (prfx " \"") "\""
wenzelm@24920
    53
        [Syntax.pretty_term ctxt (Term.show_dummy_patterns pat)])
wenzelm@16036
    54
  end;
wenzelm@16033
    55
wenzelm@30142
    56
wenzelm@30142
    57
wenzelm@16033
    58
(** search criterion filters **)
wenzelm@16033
    59
kleing@16895
    60
(*generated filters are to be of the form
wenzelm@26336
    61
  input: (Facts.ref * thm)
wenzelm@17106
    62
  output: (p:int, s:int) option, where
kleing@16895
    63
    NONE indicates no match
wenzelm@17106
    64
    p is the primary sorting criterion
kleing@16895
    65
      (eg. number of assumptions in the theorem)
kleing@16895
    66
    s is the secondary sorting criterion
kleing@16895
    67
      (eg. size of the substitution for intro, elim and dest)
kleing@16895
    68
  when applying a set of filters to a thm, fold results in:
kleing@16895
    69
    (biggest p, sum of all s)
wenzelm@17106
    70
  currently p and s only matter for intro, elim, dest and simp filters,
wenzelm@17106
    71
  otherwise the default ordering is used.
kleing@16895
    72
*)
kleing@16895
    73
kleing@16088
    74
kleing@16088
    75
(* matching theorems *)
wenzelm@17106
    76
wenzelm@17205
    77
fun is_nontrivial thy = Term.is_Const o Term.head_of o ObjectLogic.drop_judgment thy;
kleing@16088
    78
kleing@16964
    79
(*extract terms from term_src, refine them to the parts that concern us,
kleing@16964
    80
  if po try match them against obj else vice versa.
kleing@16964
    81
  trivial matches are ignored.
kleing@16964
    82
  returns: smallest substitution size*)
kleing@16964
    83
fun is_matching_thm (extract_terms, refine_term) ctxt po obj term_src =
kleing@16088
    84
  let
wenzelm@17106
    85
    val thy = ProofContext.theory_of ctxt;
kleing@16088
    86
wenzelm@16486
    87
    fun matches pat =
wenzelm@17106
    88
      is_nontrivial thy pat andalso
wenzelm@17205
    89
      Pattern.matches thy (if po then (pat, obj) else (obj, pat));
kleing@16895
    90
kleing@16895
    91
    fun substsize pat =
wenzelm@18184
    92
      let val (_, subst) =
wenzelm@18184
    93
        Pattern.match thy (if po then (pat, obj) else (obj, pat)) (Vartab.empty, Vartab.empty)
wenzelm@17205
    94
      in Vartab.fold (fn (_, (_, t)) => fn n => size_of_term t + n) subst 0 end;
kleing@16088
    95
kleing@16895
    96
    fun bestmatch [] = NONE
wenzelm@17205
    97
     |  bestmatch xs = SOME (foldr1 Int.min xs);
kleing@16895
    98
kleing@16964
    99
    val match_thm = matches o refine_term;
wenzelm@16486
   100
  in
wenzelm@26283
   101
    map (substsize o refine_term) (filter match_thm (extract_terms term_src))
wenzelm@26283
   102
    |> bestmatch
kleing@16088
   103
  end;
kleing@16088
   104
kleing@16088
   105
wenzelm@16033
   106
(* filter_name *)
wenzelm@16033
   107
wenzelm@17106
   108
fun filter_name str_pat (thmref, _) =
wenzelm@26336
   109
  if match_string str_pat (Facts.name_of_ref thmref)
wenzelm@17205
   110
  then SOME (0, 0) else NONE;
wenzelm@16033
   111
wenzelm@30142
   112
kleing@29857
   113
(* filter intro/elim/dest/solves rules *)
wenzelm@16033
   114
wenzelm@17205
   115
fun filter_dest ctxt goal (_, thm) =
wenzelm@16033
   116
  let
kleing@16964
   117
    val extract_dest =
wenzelm@17205
   118
     (fn thm => if Thm.no_prems thm then [] else [Thm.full_prop_of thm],
wenzelm@16033
   119
      hd o Logic.strip_imp_prems);
wenzelm@16033
   120
    val prems = Logic.prems_of_goal goal 1;
kleing@16895
   121
kleing@16964
   122
    fun try_subst prem = is_matching_thm extract_dest ctxt true prem thm;
wenzelm@19482
   123
    val successful = prems |> map_filter try_subst;
wenzelm@16033
   124
  in
kleing@16895
   125
    (*if possible, keep best substitution (one with smallest size)*)
wenzelm@17106
   126
    (*dest rules always have assumptions, so a dest with one
kleing@16895
   127
      assumption is as good as an intro rule with none*)
wenzelm@17205
   128
    if not (null successful)
wenzelm@17205
   129
    then SOME (Thm.nprems_of thm - 1, foldr1 Int.min successful) else NONE
wenzelm@16033
   130
  end;
wenzelm@16033
   131
wenzelm@17205
   132
fun filter_intro ctxt goal (_, thm) =
wenzelm@16033
   133
  let
wenzelm@17205
   134
    val extract_intro = (single o Thm.full_prop_of, Logic.strip_imp_concl);
wenzelm@16036
   135
    val concl = Logic.concl_of_goal goal 1;
kleing@16964
   136
    val ss = is_matching_thm extract_intro ctxt true concl thm;
wenzelm@16033
   137
  in
wenzelm@18939
   138
    if is_some ss then SOME (Thm.nprems_of thm, the ss) else NONE
wenzelm@16033
   139
  end;
wenzelm@16033
   140
wenzelm@17205
   141
fun filter_elim ctxt goal (_, thm) =
kleing@16964
   142
  if not (Thm.no_prems thm) then
kleing@16964
   143
    let
wenzelm@17205
   144
      val rule = Thm.full_prop_of thm;
kleing@16964
   145
      val prems = Logic.prems_of_goal goal 1;
kleing@16964
   146
      val goal_concl = Logic.concl_of_goal goal 1;
wenzelm@26283
   147
      val rule_mp = hd (Logic.strip_imp_prems rule);
kleing@16964
   148
      val rule_concl = Logic.strip_imp_concl rule;
wenzelm@26283
   149
      fun combine t1 t2 = Const ("*combine*", dummyT --> dummyT) $ (t1 $ t2);
kleing@16964
   150
      val rule_tree = combine rule_mp rule_concl;
wenzelm@26283
   151
      fun goal_tree prem = combine prem goal_concl;
wenzelm@17106
   152
      fun try_subst prem =
kleing@16964
   153
        is_matching_thm (single, I) ctxt true (goal_tree prem) rule_tree;
wenzelm@19482
   154
      val successful = prems |> map_filter try_subst;
kleing@16964
   155
    in
wenzelm@17106
   156
    (*elim rules always have assumptions, so an elim with one
kleing@16964
   157
      assumption is as good as an intro rule with none*)
wenzelm@17106
   158
      if is_nontrivial (ProofContext.theory_of ctxt) (Thm.major_prem_of thm)
wenzelm@17205
   159
        andalso not (null successful)
wenzelm@17205
   160
      then SOME (Thm.nprems_of thm - 1, foldr1 Int.min successful) else NONE
kleing@16964
   161
    end
kleing@16964
   162
  else NONE
wenzelm@16036
   163
kleing@29857
   164
val tac_limit = ref 5;
kleing@29857
   165
kleing@29857
   166
fun filter_solves ctxt goal = let
kleing@29857
   167
    val baregoal = Logic.get_goal (prop_of goal) 1;
kleing@29857
   168
kleing@29857
   169
    fun etacn thm i = Seq.take (!tac_limit) o etac thm i;
kleing@29857
   170
    fun try_thm thm = if Thm.no_prems thm then rtac thm 1 goal
kleing@29857
   171
                      else (etacn thm THEN_ALL_NEW
kleing@29857
   172
                             (Goal.norm_hhf_tac THEN'
kleing@29857
   173
                               Method.assumption_tac ctxt)) 1 goal;
kleing@29857
   174
  in
kleing@29857
   175
    fn (_, thm) => if (is_some o Seq.pull o try_thm) thm
kleing@29857
   176
                   then SOME (Thm.nprems_of thm, 0) else NONE
kleing@29857
   177
  end;
wenzelm@16033
   178
wenzelm@30142
   179
kleing@16074
   180
(* filter_simp *)
wenzelm@16033
   181
wenzelm@17205
   182
fun filter_simp ctxt t (_, thm) =
wenzelm@16033
   183
  let
wenzelm@16033
   184
    val (_, {mk_rews = {mk, ...}, ...}) =
wenzelm@29302
   185
      Simplifier.rep_ss (Simplifier.local_simpset_of ctxt);
wenzelm@17106
   186
    val extract_simp =
wenzelm@17205
   187
      (map Thm.full_prop_of o mk, #1 o Logic.dest_equals o Logic.strip_imp_concl);
kleing@16964
   188
    val ss = is_matching_thm extract_simp ctxt false t thm
wenzelm@17106
   189
  in
wenzelm@18939
   190
    if is_some ss then SOME (Thm.nprems_of thm, the ss) else NONE
kleing@16964
   191
  end;
wenzelm@16033
   192
wenzelm@16033
   193
wenzelm@16033
   194
(* filter_pattern *)
wenzelm@16033
   195
kleing@29857
   196
fun get_names t = (Term.add_const_names t []) union (Term.add_free_names t []);
kleing@29857
   197
fun get_thm_names (_, thm) = get_names (Thm.full_prop_of thm);
kleing@29857
   198
  (* Including all constants and frees is only sound because
kleing@29857
   199
     matching uses higher-order patterns. If full matching
kleing@29857
   200
     were used, then constants that may be subject to
kleing@29857
   201
     beta-reduction after substitution of frees should
kleing@29857
   202
     not be included for LHS set because they could be
kleing@29857
   203
     thrown away by the substituted function.
kleing@29857
   204
     e.g. for (?F 1 2) do not include 1 or 2, if it were
kleing@29857
   205
          possible for ?F to be (% x y. 3)
kleing@29857
   206
     The largest possible set should always be included on
kleing@29857
   207
     the RHS. *)
kleing@28900
   208
kleing@28900
   209
fun filter_pattern ctxt pat = let
kleing@29857
   210
    val pat_consts = get_names pat;
kleing@28900
   211
kleing@29857
   212
    fun check (t, NONE) = check (t, SOME (get_thm_names t))
kleing@28900
   213
      | check ((_, thm), c as SOME thm_consts) =
kleing@28900
   214
          (if pat_consts subset_string thm_consts
kleing@28900
   215
              andalso (Pattern.matches_subterm (ProofContext.theory_of ctxt)
kleing@28900
   216
                                               (pat, Thm.full_prop_of thm))
kleing@28900
   217
           then SOME (0, 0) else NONE, c);
kleing@28900
   218
  in check end;
wenzelm@16033
   219
wenzelm@30142
   220
wenzelm@16033
   221
(* interpret criteria as filters *)
wenzelm@16033
   222
wenzelm@16036
   223
local
wenzelm@16036
   224
wenzelm@16036
   225
fun err_no_goal c =
wenzelm@16036
   226
  error ("Current goal required for " ^ c ^ " search criterion");
wenzelm@16036
   227
kleing@29857
   228
val fix_goal = Thm.prop_of;
kleing@29857
   229
val fix_goalo = Option.map fix_goal;
kleing@29857
   230
kleing@28900
   231
fun filter_crit _ _ (Name name) = apfst (filter_name name)
wenzelm@16036
   232
  | filter_crit _ NONE Intro = err_no_goal "intro"
wenzelm@16036
   233
  | filter_crit _ NONE Elim = err_no_goal "elim"
wenzelm@16036
   234
  | filter_crit _ NONE Dest = err_no_goal "dest"
kleing@29857
   235
  | filter_crit _ NONE Solves = err_no_goal "solves"
kleing@29857
   236
  | filter_crit ctxt (SOME goal) Intro = apfst (filter_intro ctxt
kleing@29857
   237
                                                  (fix_goal goal))
kleing@29857
   238
  | filter_crit ctxt (SOME goal) Elim = apfst (filter_elim ctxt 
kleing@29857
   239
                                                  (fix_goal goal))
kleing@29857
   240
  | filter_crit ctxt (SOME goal) Dest = apfst (filter_dest ctxt
kleing@29857
   241
                                                  (fix_goal goal))
kleing@29857
   242
  | filter_crit ctxt (SOME goal) Solves = apfst (filter_solves ctxt goal)
kleing@28900
   243
  | filter_crit ctxt _ (Simp pat) = apfst (filter_simp ctxt pat)
kleing@16088
   244
  | filter_crit ctxt _ (Pattern pat) = filter_pattern ctxt pat;
wenzelm@16036
   245
wenzelm@19502
   246
fun opt_not x = if is_some x then NONE else SOME (0, 0);
kleing@16895
   247
wenzelm@17756
   248
fun opt_add (SOME (a, x)) (SOME (b, y)) = SOME (Int.max (a, b), x + y : int)
wenzelm@26283
   249
  | opt_add _ _ = NONE;
kleing@16895
   250
kleing@28900
   251
fun app_filters thm = let
kleing@28900
   252
    fun app (NONE, _, _) = NONE
kleing@28900
   253
      | app (SOME v, consts, []) = SOME (v, thm)
kleing@28900
   254
      | app (r, consts, f::fs) = let val (r', consts') = f (thm, consts)
kleing@28900
   255
                                 in app (opt_add r r', consts', fs) end;
kleing@28900
   256
  in app end;
kleing@28900
   257
wenzelm@16036
   258
in
wenzelm@16033
   259
wenzelm@16033
   260
fun filter_criterion ctxt opt_goal (b, c) =
kleing@28900
   261
  (if b then I else (apfst opt_not)) o filter_crit ctxt opt_goal c;
kleing@16895
   262
kleing@16895
   263
fun all_filters filters thms =
kleing@16895
   264
  let
kleing@28900
   265
    fun eval_filters thm = app_filters thm (SOME (0, 0), NONE, filters);
wenzelm@16033
   266
kleing@16895
   267
    (*filters return: (number of assumptions, substitution size) option, so
kleing@16964
   268
      sort (desc. in both cases) according to number of assumptions first,
kleing@16895
   269
      then by the substitution size*)
wenzelm@17205
   270
    fun thm_ord (((p0, s0), _), ((p1, s1), _)) =
wenzelm@17205
   271
      prod_ord int_ord int_ord ((p1, s1), (p0, s0));
kleing@28900
   272
  in map_filter eval_filters thms |> sort thm_ord |> map #2 end;
wenzelm@16033
   273
wenzelm@16036
   274
end;
wenzelm@16036
   275
wenzelm@16033
   276
kleing@22414
   277
(* removing duplicates, preferring nicer names, roughly n log n *)
kleing@22340
   278
wenzelm@25226
   279
local
wenzelm@25226
   280
huffman@27486
   281
val index_ord = option_ord (K EQUAL);
wenzelm@25226
   282
val hidden_ord = bool_ord o pairself NameSpace.is_hidden;
wenzelm@25226
   283
val qual_ord = int_ord o pairself (length o NameSpace.explode);
wenzelm@25226
   284
val txt_ord = int_ord o pairself size;
wenzelm@25226
   285
huffman@27486
   286
fun nicer_name (x, i) (y, j) =
huffman@27486
   287
  (case hidden_ord (x, y) of EQUAL =>
huffman@27486
   288
    (case index_ord (i, j) of EQUAL =>
huffman@27486
   289
      (case qual_ord (x, y) of EQUAL => txt_ord (x, y) | ord => ord)
huffman@27486
   290
    | ord => ord)
wenzelm@25226
   291
  | ord => ord) <> GREATER;
wenzelm@25226
   292
Timothy@29848
   293
fun rem_cdups nicer xs =
wenzelm@26336
   294
  let
wenzelm@26336
   295
    fun rem_c rev_seen [] = rev rev_seen
wenzelm@26336
   296
      | rem_c rev_seen [x] = rem_c (x :: rev_seen) []
wenzelm@26336
   297
      | rem_c rev_seen ((x as ((n, t), _)) :: (y as ((n', t'), _)) :: xs) =
wenzelm@26336
   298
        if Thm.eq_thm_prop (t, t')
wenzelm@26336
   299
        then rem_c rev_seen ((if nicer n n' then x else y) :: xs)
wenzelm@26336
   300
        else rem_c (x :: rev_seen) (y :: xs)
wenzelm@26336
   301
  in rem_c [] xs end;
wenzelm@25226
   302
wenzelm@26336
   303
in
wenzelm@25226
   304
Timothy@29848
   305
fun nicer_shortest ctxt = let
Timothy@29848
   306
    val ns = ProofContext.theory_of ctxt
Timothy@29848
   307
             |> PureThy.facts_of
Timothy@29848
   308
             |> Facts.space_of;
Timothy@29848
   309
Timothy@29848
   310
    val len_sort = sort (int_ord o (pairself size));
Timothy@29848
   311
    fun shorten s = (case len_sort (NameSpace.get_accesses ns s) of
Timothy@29848
   312
                       [] => s
Timothy@29848
   313
                     | s'::_ => s');
Timothy@29848
   314
Timothy@29848
   315
    fun nicer (Facts.Named ((x, _), i)) (Facts.Named ((y, _), j)) =
Timothy@29848
   316
          nicer_name (shorten x, i) (shorten y, j)
Timothy@29848
   317
      | nicer (Facts.Fact _) (Facts.Named _) = true
Timothy@29848
   318
      | nicer (Facts.Named _) (Facts.Fact _) = false;
Timothy@29848
   319
  in nicer end;
Timothy@29848
   320
Timothy@29848
   321
fun rem_thm_dups nicer xs =
wenzelm@26336
   322
  xs ~~ (1 upto length xs)
wenzelm@29269
   323
  |> sort (TermOrd.fast_term_ord o pairself (Thm.prop_of o #2 o #1))
Timothy@29848
   324
  |> rem_cdups nicer
wenzelm@26336
   325
  |> sort (int_ord o pairself #2)
wenzelm@26336
   326
  |> map #1;
kleing@22340
   327
wenzelm@26336
   328
end;
kleing@22340
   329
kleing@22340
   330
wenzelm@16033
   331
(* print_theorems *)
wenzelm@16033
   332
wenzelm@26283
   333
fun all_facts_of ctxt =
wenzelm@26336
   334
  maps Facts.selections
wenzelm@27173
   335
   (Facts.dest_static [] (PureThy.facts_of (ProofContext.theory_of ctxt)) @
wenzelm@27173
   336
    Facts.dest_static [] (ProofContext.facts_of ctxt));
wenzelm@17972
   337
wenzelm@25992
   338
val limit = ref 40;
wenzelm@25992
   339
kleing@29857
   340
fun find_theorems ctxt opt_goal rem_dups raw_criteria =
wenzelm@16033
   341
  let
kleing@29857
   342
    val add_prems = Seq.hd o (TRY (Method.insert_tac
kleing@29857
   343
                                     (Assumption.prems_of ctxt) 1));
kleing@29857
   344
    val opt_goal' = Option.map add_prems opt_goal;
kleing@29857
   345
wenzelm@16036
   346
    val criteria = map (apsnd (read_criterion ctxt)) raw_criteria;
kleing@29857
   347
    val filters = map (filter_criterion ctxt opt_goal') criteria;
wenzelm@16033
   348
wenzelm@26283
   349
    val raw_matches = all_filters filters (all_facts_of ctxt);
kleing@28900
   350
wenzelm@22360
   351
    val matches =
kleing@22414
   352
      if rem_dups
Timothy@29848
   353
      then rem_thm_dups (nicer_shortest ctxt) raw_matches
wenzelm@22360
   354
      else raw_matches;
kleing@29857
   355
  in matches end;
kleing@29857
   356
kleing@29857
   357
fun print_theorems ctxt opt_goal opt_limit rem_dups raw_criteria = let
kleing@29857
   358
    val start = start_timing ();
kleing@29857
   359
kleing@29857
   360
    val criteria = map (apsnd (read_criterion ctxt)) raw_criteria;
kleing@29857
   361
    val matches = find_theorems ctxt opt_goal rem_dups raw_criteria;
kleing@22340
   362
wenzelm@16033
   363
    val len = length matches;
wenzelm@25992
   364
    val lim = the_default (! limit) opt_limit;
wenzelm@25992
   365
    val thms = Library.drop (len - lim, matches);
wenzelm@16033
   366
kleing@28900
   367
    val end_msg = " in " ^
kleing@28900
   368
                  (List.nth (String.tokens Char.isSpace (end_timing start), 3))
kleing@28900
   369
                  ^ " secs"
wenzelm@16033
   370
  in
kleing@28900
   371
    Pretty.big_list "searched for:" (map (pretty_criterion ctxt) criteria)
kleing@29857
   372
        :: Pretty.str "" ::
kleing@28900
   373
     (if null thms then [Pretty.str ("nothing found" ^ end_msg)]
wenzelm@16033
   374
      else
wenzelm@16036
   375
        [Pretty.str ("found " ^ string_of_int len ^ " theorems" ^
kleing@28900
   376
          (if len <= lim then ""
kleing@28900
   377
           else " (" ^ string_of_int lim ^ " displayed)")
kleing@28900
   378
           ^ end_msg ^ ":"), Pretty.str ""] @
kleing@29858
   379
        map Display.pretty_fact thms)
wenzelm@16033
   380
    |> Pretty.chunks |> Pretty.writeln
wenzelm@30142
   381
  end;
wenzelm@30142
   382
wenzelm@30142
   383
wenzelm@30142
   384
wenzelm@30142
   385
(** command syntax **)
wenzelm@30142
   386
wenzelm@30142
   387
fun find_theorems_cmd ((opt_lim, rem_dups), spec) =
wenzelm@30142
   388
  Toplevel.unknown_theory o Toplevel.keep (fn state =>
wenzelm@30142
   389
  let
wenzelm@30142
   390
    val proof_state = Toplevel.enter_proof_body state;
wenzelm@30142
   391
    val ctxt = Proof.context_of proof_state;
wenzelm@30142
   392
    val opt_goal = try Proof.get_goal proof_state |> Option.map (#2 o #2);
wenzelm@30142
   393
  in print_theorems ctxt opt_goal opt_lim rem_dups spec end);
wenzelm@30142
   394
wenzelm@30142
   395
local
wenzelm@30142
   396
wenzelm@30142
   397
structure P = OuterParse and K = OuterKeyword;
wenzelm@30142
   398
wenzelm@30142
   399
val criterion =
wenzelm@30142
   400
  P.reserved "name" |-- P.!!! (P.$$$ ":" |-- P.xname) >> Name ||
wenzelm@30142
   401
  P.reserved "intro" >> K Intro ||
wenzelm@30142
   402
  P.reserved "elim" >> K Elim ||
wenzelm@30142
   403
  P.reserved "dest" >> K Dest ||
wenzelm@30142
   404
  P.reserved "solves" >> K Solves ||
wenzelm@30142
   405
  P.reserved "simp" |-- P.!!! (P.$$$ ":" |-- P.term) >> Simp ||
wenzelm@30142
   406
  P.term >> Pattern;
wenzelm@30142
   407
wenzelm@30142
   408
val options =
wenzelm@30142
   409
  Scan.optional
wenzelm@30142
   410
    (P.$$$ "(" |--
wenzelm@30142
   411
      P.!!! (Scan.option P.nat -- Scan.optional (P.reserved "with_dups" >> K false) true
wenzelm@30142
   412
        --| P.$$$ ")")) (NONE, true);
wenzelm@30142
   413
in
wenzelm@30142
   414
wenzelm@30142
   415
val _ =
wenzelm@30142
   416
  OuterSyntax.improper_command "find_theorems" "print theorems meeting specified criteria" K.diag
wenzelm@30142
   417
    (options -- Scan.repeat (((Scan.option P.minus >> is_none) -- criterion))
wenzelm@30142
   418
      >> (Toplevel.no_timing oo find_theorems_cmd));
wenzelm@16033
   419
wenzelm@16033
   420
end;
wenzelm@30142
   421
wenzelm@30142
   422
end;