src/Provers/classical.ML
author wenzelm
Mon, 03 Nov 1997 11:56:36 +0100
changeset 4079 9df5e4f22d96
parent 4066 7b508ac609f7
child 4124 1af16493c57f
permissions -rw-r--r--
new implicit claset mechanism based on Sign.sg anytype data; tuned warnings;
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
     1
(*  Title: 	Provers/classical.ML
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     2
    ID:         $Id$
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     3
    Author: 	Lawrence C Paulson, Cambridge University Computer Laboratory
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     4
    Copyright   1992  University of Cambridge
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     5
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     6
Theorem prover for classical reasoning, including predicate calculus, set
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     7
theory, etc.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     8
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
     9
Rules must be classified as intr, elim, safe, hazardous (unsafe).
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    10
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    11
A rule is unsafe unless it can be applied blindly without harmful results.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    12
For a rule to be safe, its premises and conclusion should be logically
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    13
equivalent.  There should be no variables in the premises that are not in
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    14
the conclusion.
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    15
*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    16
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    17
(*higher precedence than := facilitates use of references*)
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    18
infix 4 addSIs addSEs addSDs addIs addEs addDs delrules
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    19
  setSWrapper compSWrapper setWrapper compWrapper
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    20
  addSbefore addSaltern addbefore addaltern;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    21
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    22
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    23
(*should be a type abbreviation in signature CLASSICAL*)
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    24
type netpair = (int * (bool * thm)) Net.net * (int * (bool * thm)) Net.net;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    25
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    26
signature CLASET_THY_DATA =
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    27
sig
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    28
  val clasetK: string
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    29
  exception ClasetData of exn ref
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    30
  val thy_data: string * (exn * (exn -> exn) * (exn * exn -> exn) * (exn -> unit))
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    31
  val fix_methods: exn * (exn -> exn) * (exn * exn -> exn) * (exn -> unit) -> unit
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    32
end;
2868
17a23a62f82a New DEEPEN allows giving an upper bound for deepen_tac
paulson
parents: 2813
diff changeset
    33
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    34
signature CLASSICAL_DATA =
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    35
sig
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    36
  val mp	: thm    	(* [| P-->Q;  P |] ==> Q *)
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    37
  val not_elim	: thm		(* [| ~P;  P |] ==> R *)
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    38
  val classical	: thm		(* (~P ==> P) ==> P *)
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    39
  val sizef 	: thm -> int	(* size function for BEST_FIRST *)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    40
  val hyp_subst_tacs: (int -> tactic) list
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    41
end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    42
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    43
signature CLASSICAL =
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    44
sig
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    45
  type claset
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    46
  val empty_cs: claset
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    47
  val print_cs: claset -> unit
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    48
  val rep_claset:
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    49
    claset -> {safeIs: thm list, safeEs: thm list,
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    50
		 hazIs: thm list, hazEs: thm list,
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    51
		 uwrapper: (int -> tactic) -> (int -> tactic),
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    52
		 swrapper: (int -> tactic) -> (int -> tactic),
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    53
		 safe0_netpair: netpair, safep_netpair: netpair,
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    54
		 haz_netpair: netpair, dup_netpair: netpair}
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
    55
  val merge_cs		: claset * claset -> claset
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    56
  val addDs 		: claset * thm list -> claset
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    57
  val addEs 		: claset * thm list -> claset
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    58
  val addIs 		: claset * thm list -> claset
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    59
  val addSDs		: claset * thm list -> claset
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    60
  val addSEs		: claset * thm list -> claset
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    61
  val addSIs		: claset * thm list -> claset
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
    62
  val delrules		: claset * thm list -> claset
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    63
  val setSWrapper 	: claset * ((int -> tactic) -> (int -> tactic)) ->claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    64
  val compSWrapper 	: claset * ((int -> tactic) -> (int -> tactic)) ->claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    65
  val setWrapper 	: claset * ((int -> tactic) -> (int -> tactic)) ->claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    66
  val compWrapper 	: claset * ((int -> tactic) -> (int -> tactic)) ->claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    67
  val addSbefore 	: claset * (int -> tactic) -> claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    68
  val addSaltern 	: claset * (int -> tactic) -> claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    69
  val addbefore 	: claset * (int -> tactic) -> claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    70
  val addaltern	 	: claset * (int -> tactic) -> claset
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    71
  val getWrapper	: claset -> (int -> tactic) -> (int -> tactic)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
    72
  val getSWrapper	: claset -> (int -> tactic) -> (int -> tactic)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
    73
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    74
  val claset_ref_of_sg: Sign.sg -> claset ref
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    75
  val claset_ref_of: theory -> claset ref
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    76
  val claset_of_sg: Sign.sg -> claset
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    77
  val claset_of: theory -> claset
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    78
  val CLASET: (claset -> tactic) -> tactic
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    79
  val CLASET': (claset -> 'a -> tactic) -> 'a -> tactic
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    80
  val claset: unit -> claset
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    81
  val claset_ref: unit -> claset ref
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
    82
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    83
  val fast_tac 		: claset -> int -> tactic
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    84
  val slow_tac 		: claset -> int -> tactic
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    85
  val weight_ASTAR	: int ref
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    86
  val astar_tac		: claset -> int -> tactic
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    87
  val slow_astar_tac 	: claset -> int -> tactic
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    88
  val best_tac 		: claset -> int -> tactic
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    89
  val slow_best_tac 	: claset -> int -> tactic
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    90
  val depth_tac		: claset -> int -> int -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    91
  val deepen_tac	: claset -> int -> int -> tactic
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    92
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
    93
  val contr_tac 	: int -> tactic
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    94
  val dup_elim		: thm -> thm
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    95
  val dup_intr		: thm -> thm
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    96
  val dup_step_tac	: claset -> int -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    97
  val eq_mp_tac		: int -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    98
  val haz_step_tac 	: claset -> int -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
    99
  val joinrules 	: thm list * thm list -> (bool * thm) list
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   100
  val mp_tac		: int -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   101
  val safe_tac 		: claset -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   102
  val safe_step_tac 	: claset -> int -> tactic
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   103
  val clarify_tac 	: claset -> int -> tactic
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   104
  val clarify_step_tac 	: claset -> int -> tactic
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   105
  val step_tac 		: claset -> int -> tactic
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   106
  val slow_step_tac	: claset -> int -> tactic
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   107
  val swap		: thm                 (* ~P ==> (~Q ==> P) ==> Q *)
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   108
  val swapify 		: thm list -> thm list
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   109
  val swap_res_tac 	: thm list -> int -> tactic
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   110
  val inst_step_tac 	: claset -> int -> tactic
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   111
  val inst0_step_tac 	: claset -> int -> tactic
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   112
  val instp_step_tac 	: claset -> int -> tactic
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   113
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   114
  val AddDs 		: thm list -> unit
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   115
  val AddEs 		: thm list -> unit
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   116
  val AddIs 		: thm list -> unit
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   117
  val AddSDs		: thm list -> unit
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   118
  val AddSEs		: thm list -> unit
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   119
  val AddSIs		: thm list -> unit
1807
3ff66483a8d4 Now exports Delrules
paulson
parents: 1800
diff changeset
   120
  val Delrules		: thm list -> unit
3727
ed63c05d7992 Added Safe_tac; all other default claset tactics now dereference "claset"
paulson
parents: 3705
diff changeset
   121
  val Safe_tac         	: tactic
1814
89f8d4a88cca Addition of Safe_step_tac
paulson
parents: 1807
diff changeset
   122
  val Safe_step_tac	: int -> tactic
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   123
  val Clarify_tac 	: int -> tactic
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   124
  val Clarify_step_tac 	: int -> tactic
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   125
  val Step_tac 		: int -> tactic
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   126
  val Fast_tac 		: int -> tactic
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   127
  val Best_tac 		: int -> tactic
2066
b9063086ef56 Introduction of Slow_tac and Slow_best_tac
paulson
parents: 1938
diff changeset
   128
  val Slow_tac 		: int -> tactic
b9063086ef56 Introduction of Slow_tac and Slow_best_tac
paulson
parents: 1938
diff changeset
   129
  val Slow_best_tac     : int -> tactic
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   130
  val Deepen_tac	: int -> int -> tactic
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   131
end;
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   132
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   133
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   134
structure ClasetThyData: CLASET_THY_DATA =
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   135
struct
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   136
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   137
(* data kind claset -- forward declaration *)
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   138
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   139
val clasetK = "claset";
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   140
exception ClasetData of exn ref;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   141
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   142
local
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   143
  fun undef _ = raise Match;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   144
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   145
  val empty_ref = ref ERROR;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   146
  val prep_ext_fn = ref (undef: exn -> exn);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   147
  val merge_fn = ref (undef: exn * exn -> exn);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   148
  val print_fn = ref (undef: exn -> unit);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   149
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   150
  val empty = ClasetData empty_ref;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   151
  fun prep_ext exn = ! prep_ext_fn exn;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   152
  fun merge exn = ! merge_fn exn;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   153
  fun print exn = ! print_fn exn;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   154
in
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   155
  val thy_data = (clasetK, (empty, prep_ext, merge, print));
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   156
  fun fix_methods (e, ext, mrg, prt) =
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   157
    (empty_ref := e; prep_ext_fn := ext; merge_fn := mrg; print_fn := prt);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   158
end;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   159
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   160
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   161
end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   162
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   163
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   164
functor ClassicalFun(Data: CLASSICAL_DATA): CLASSICAL = 
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   165
struct
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   166
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   167
local open ClasetThyData Data in
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   168
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   169
(*** Useful tactics for classical reasoning ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   170
1524
524879632d88 imp_elim and swap are now stored in thm database
paulson
parents: 1231
diff changeset
   171
val imp_elim = (*cannot use bind_thm within a structure!*)
524879632d88 imp_elim and swap are now stored in thm database
paulson
parents: 1231
diff changeset
   172
  store_thm ("imp_elim", make_elim mp);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   173
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   174
(*Solve goal that assumes both P and ~P. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   175
val contr_tac = eresolve_tac [not_elim]  THEN'  assume_tac;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   176
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   177
(*Finds P-->Q and P in the assumptions, replaces implication by Q.
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   178
  Could do the same thing for P<->Q and P... *)
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   179
fun mp_tac i = eresolve_tac [not_elim, imp_elim] i  THEN  assume_tac i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   180
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   181
(*Like mp_tac but instantiates no variables*)
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   182
fun eq_mp_tac i = ematch_tac [not_elim, imp_elim] i  THEN  eq_assume_tac i;
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   183
1524
524879632d88 imp_elim and swap are now stored in thm database
paulson
parents: 1231
diff changeset
   184
val swap =
524879632d88 imp_elim and swap are now stored in thm database
paulson
parents: 1231
diff changeset
   185
  store_thm ("swap", rule_by_tactic (etac thin_rl 1) (not_elim RS classical));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   186
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   187
(*Creates rules to eliminate ~A, from rules to introduce A*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   188
fun swapify intrs = intrs RLN (2, [swap]);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   189
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   190
(*Uses introduction rules in the normal way, or on negated assumptions,
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   191
  trying rules in order. *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   192
fun swap_res_tac rls = 
54
3dea30013b58 classical/swap_res_tac: recoded to allow backtracking
lcp
parents: 0
diff changeset
   193
    let fun addrl (rl,brls) = (false, rl) :: (true, rl RSN (2,swap)) :: brls
3dea30013b58 classical/swap_res_tac: recoded to allow backtracking
lcp
parents: 0
diff changeset
   194
    in  assume_tac 	ORELSE' 
3dea30013b58 classical/swap_res_tac: recoded to allow backtracking
lcp
parents: 0
diff changeset
   195
	contr_tac 	ORELSE' 
3dea30013b58 classical/swap_res_tac: recoded to allow backtracking
lcp
parents: 0
diff changeset
   196
        biresolve_tac (foldr addrl (rls,[]))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   197
    end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   198
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   199
(*Duplication of hazardous rules, for complete provers*)
2689
6d3d893453de dup_intr & dup_elim no longer call standard -- this
paulson
parents: 2630
diff changeset
   200
fun dup_intr th = zero_var_indexes (th RS classical);
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   201
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   202
fun dup_elim th = th RSN (2, revcut_rl) |> assumption 2 |> Sequence.hd |> 
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   203
                  rule_by_tactic (TRYALL (etac revcut_rl));
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   204
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   205
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   206
(**** Classical rule sets ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   207
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   208
datatype claset =
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   209
  CS of {safeIs		: thm list,		(*safe introduction rules*)
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   210
	 safeEs		: thm list,		(*safe elimination rules*)
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   211
	 hazIs		: thm list,		(*unsafe introduction rules*)
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   212
	 hazEs		: thm list,		(*unsafe elimination rules*)
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   213
	 uwrapper	: (int -> tactic) ->
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   214
			  (int -> tactic),	(*for transforming step_tac*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   215
	 swrapper	: (int -> tactic) ->
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   216
			  (int -> tactic),	(*for transform. safe_step_tac*)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   217
	 safe0_netpair	: netpair,		(*nets for trivial cases*)
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   218
	 safep_netpair	: netpair,		(*nets for >0 subgoals*)
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   219
	 haz_netpair  	: netpair,		(*nets for unsafe rules*)
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   220
	 dup_netpair	: netpair};		(*nets for duplication*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   221
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   222
(*Desired invariants are
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   223
	safe0_netpair = build safe0_brls,
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   224
	safep_netpair = build safep_brls,
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   225
	haz_netpair = build (joinrules(hazIs, hazEs)),
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   226
	dup_netpair = build (joinrules(map dup_intr hazIs, 
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   227
				       map dup_elim hazEs))}
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   228
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   229
where build = build_netpair(Net.empty,Net.empty), 
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   230
      safe0_brls contains all brules that solve the subgoal, and
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   231
      safep_brls contains all brules that generate 1 or more new subgoals.
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   232
The theorem lists are largely comments, though they are used in merge_cs and print_cs.
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   233
Nets must be built incrementally, to save space and time.
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   234
*)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   235
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   236
val empty_cs = 
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   237
  CS{safeIs	= [],
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   238
     safeEs	= [],
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   239
     hazIs	= [],
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   240
     hazEs	= [],
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   241
     uwrapper   = I,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   242
     swrapper   = I,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   243
     safe0_netpair = (Net.empty,Net.empty),
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   244
     safep_netpair = (Net.empty,Net.empty),
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   245
     haz_netpair   = (Net.empty,Net.empty),
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   246
     dup_netpair   = (Net.empty,Net.empty)};
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   247
3546
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   248
fun print_cs (CS {safeIs, safeEs, hazIs, hazEs, ...}) =
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   249
  let val pretty_thms = map Display.pretty_thm in
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   250
    Pretty.writeln (Pretty.big_list "introduction rules:" (pretty_thms hazIs));
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   251
    Pretty.writeln (Pretty.big_list "safe introduction rules:" (pretty_thms safeIs));
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   252
    Pretty.writeln (Pretty.big_list "elimination rules:" (pretty_thms hazEs));
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   253
    Pretty.writeln (Pretty.big_list "safe elimination rules:" (pretty_thms safeEs))
de164676a202 improved print_cs;
wenzelm
parents: 3537
diff changeset
   254
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   255
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   256
fun rep_claset (CS args) = args;
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   257
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   258
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   259
fun getWrapper  (CS{uwrapper,...}) = uwrapper;
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   260
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   261
fun getSWrapper (CS{swrapper,...}) = swrapper;
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   262
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   263
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   264
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   265
(*** Adding (un)safe introduction or elimination rules.
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   266
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   267
    In case of overlap, new rules are tried BEFORE old ones!!
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   268
***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   269
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   270
(*For use with biresolve_tac.  Combines intr rules with swap to handle negated
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   271
  assumptions.  Pairs elim rules with true. *)
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   272
fun joinrules (intrs,elims) =  
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   273
    (map (pair true) (elims @ swapify intrs)  @
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   274
     map (pair false) intrs);
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   275
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   276
(*Priority: prefer rules with fewest subgoals, 
1231
91d2c1bb5803 clarified comment
paulson
parents: 1073
diff changeset
   277
  then rules added most recently (preferring the head of the list).*)
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   278
fun tag_brls k [] = []
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   279
  | tag_brls k (brl::brls) =
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   280
      (1000000*subgoals_of_brl brl + k, brl) :: 
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   281
      tag_brls (k+1) brls;
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   282
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   283
fun insert_tagged_list kbrls netpr = foldr insert_tagged_brl (kbrls, netpr);
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   284
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   285
(*Insert into netpair that already has nI intr rules and nE elim rules.
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   286
  Count the intr rules double (to account for swapify).  Negate to give the
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   287
  new insertions the lowest priority.*)
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   288
fun insert (nI,nE) = insert_tagged_list o (tag_brls (~(2*nI+nE))) o joinrules;
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   289
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   290
fun delete_tagged_list brls netpr = foldr delete_tagged_brl (brls, netpr);
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   291
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   292
val delete = delete_tagged_list o joinrules;
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   293
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   294
val mem_thm = gen_mem eq_thm
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   295
and rem_thm = gen_rem eq_thm;
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   296
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   297
(*Warn if the rule is already present ELSEWHERE in the claset.  The addition
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   298
  is still allowed.*)
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   299
fun warn_dup th (CS{safeIs, safeEs, hazIs, hazEs, ...}) = 
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   300
       if mem_thm (th, safeIs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   301
	 warning ("Rule already in claset as Safe Intr\n" ^ string_of_thm th)
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   302
  else if mem_thm (th, safeEs) then
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   303
         warning ("Rule already in claset as Safe Elim\n" ^ string_of_thm th)
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   304
  else if mem_thm (th, hazIs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   305
         warning ("Rule already in claset as unsafe Intr\n" ^ string_of_thm th)
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   306
  else if mem_thm (th, hazEs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   307
         warning ("Rule already in claset as unsafe Elim\n" ^ string_of_thm th)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   308
  else ();
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   309
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   310
(*** Safe rules ***)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   311
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   312
fun addSI (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   313
	      safe0_netpair, safep_netpair, haz_netpair, dup_netpair},
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   314
	   th)  =
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   315
  if mem_thm (th, safeIs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   316
	 (warning ("Ignoring duplicate Safe Intr\n" ^ string_of_thm th);
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   317
	  cs)
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   318
  else
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   319
  let val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   320
          partition (fn rl => nprems_of rl=0) [th]
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   321
      val nI = length safeIs + 1
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   322
      and nE = length safeEs
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   323
  in warn_dup th cs;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   324
     CS{safeIs	= th::safeIs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   325
        safe0_netpair = insert (nI,nE) (safe0_rls, []) safe0_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   326
	safep_netpair = insert (nI,nE) (safep_rls, []) safep_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   327
	safeEs	= safeEs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   328
	hazIs	= hazIs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   329
	hazEs	= hazEs,
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   330
	uwrapper     = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   331
	swrapper     = swrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   332
	haz_netpair  = haz_netpair,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   333
	dup_netpair  = dup_netpair}
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   334
  end;
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   335
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   336
fun addSE (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   337
		    safe0_netpair, safep_netpair, haz_netpair, dup_netpair},
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   338
	   th)  =
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   339
  if mem_thm (th, safeEs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   340
	 (warning ("Ignoring duplicate Safe Elim\n" ^ string_of_thm th);
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   341
	  cs)
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   342
  else
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   343
  let val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*)
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   344
          partition (fn rl => nprems_of rl=1) [th]
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   345
      val nI = length safeIs
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   346
      and nE = length safeEs + 1
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   347
  in warn_dup th cs;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   348
     CS{safeEs	= th::safeEs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   349
        safe0_netpair = insert (nI,nE) ([], safe0_rls) safe0_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   350
	safep_netpair = insert (nI,nE) ([], safep_rls) safep_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   351
	safeIs	= safeIs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   352
	hazIs	= hazIs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   353
	hazEs	= hazEs,
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   354
	uwrapper     = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   355
	swrapper     = swrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   356
	haz_netpair  = haz_netpair,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   357
	dup_netpair  = dup_netpair}
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   358
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   359
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   360
fun rev_foldl f (e, l) = foldl f (e, rev l);
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   361
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   362
val op addSIs = rev_foldl addSI;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   363
val op addSEs = rev_foldl addSE;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   364
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   365
fun cs addSDs ths = cs addSEs (map make_elim ths);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   366
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   367
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   368
(*** Hazardous (unsafe) rules ***)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   369
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   370
fun addI (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   371
		   safe0_netpair, safep_netpair, haz_netpair, dup_netpair},
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   372
	  th)=
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   373
  if mem_thm (th, hazIs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   374
	 (warning ("Ignoring duplicate unsafe Intr\n" ^ string_of_thm th);
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   375
	  cs)
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   376
  else
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   377
  let val nI = length hazIs + 1
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   378
      and nE = length hazEs
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   379
  in warn_dup th cs;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   380
     CS{hazIs	= th::hazIs,
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   381
	haz_netpair = insert (nI,nE) ([th], []) haz_netpair,
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   382
	dup_netpair = insert (nI,nE) (map dup_intr [th], []) dup_netpair,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   383
	safeIs 	= safeIs, 
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   384
	safeEs	= safeEs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   385
	hazEs	= hazEs,
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   386
	uwrapper      = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   387
	swrapper      = swrapper,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   388
	safe0_netpair = safe0_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   389
	safep_netpair = safep_netpair}
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   390
  end;
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   391
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   392
fun addE (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   393
		   safe0_netpair, safep_netpair, haz_netpair, dup_netpair},
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   394
	  th) =
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   395
  if mem_thm (th, hazEs) then 
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   396
	 (warning ("Ignoring duplicate unsafe Elim\n" ^ string_of_thm th);
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   397
	  cs)
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   398
  else
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   399
  let val nI = length hazIs 
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   400
      and nE = length hazEs + 1
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   401
  in warn_dup th cs;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   402
     CS{hazEs	= th::hazEs,
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   403
	haz_netpair = insert (nI,nE) ([], [th]) haz_netpair,
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   404
	dup_netpair = insert (nI,nE) ([], map dup_elim [th]) dup_netpair,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   405
	safeIs	= safeIs, 
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   406
	safeEs	= safeEs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   407
	hazIs	= hazIs,
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   408
	uwrapper      = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   409
	swrapper      = swrapper,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   410
	safe0_netpair = safe0_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   411
	safep_netpair = safep_netpair}
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   412
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   413
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   414
val op addIs = rev_foldl addI;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   415
val op addEs = rev_foldl addE;
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   416
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   417
fun cs addDs ths = cs addEs (map make_elim ths);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   418
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   419
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   420
(*** Deletion of rules 
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   421
     Working out what to delete, requires repeating much of the code used
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   422
	to insert.
1927
6f97cb16e453 New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents: 1814
diff changeset
   423
     Separate functions delSI, etc., are not exported; instead delrules
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   424
        searches in all the lists and chooses the relevant delXX functions.
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   425
***)
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   426
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   427
fun delSI th 
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   428
          (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   429
		    safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) =
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   430
 if mem_thm (th, safeIs) then
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   431
   let val (safe0_rls, safep_rls) = partition (fn rl => nprems_of rl=0) [th]
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   432
   in CS{safe0_netpair = delete (safe0_rls, []) safe0_netpair,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   433
	 safep_netpair = delete (safep_rls, []) safep_netpair,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   434
	 safeIs	= rem_thm (safeIs,th),
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   435
	 safeEs	= safeEs,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   436
	 hazIs	= hazIs,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   437
	 hazEs	= hazEs,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   438
	 uwrapper     = uwrapper,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   439
	 swrapper     = swrapper,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   440
	 haz_netpair  = haz_netpair,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   441
	 dup_netpair  = dup_netpair}
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   442
   end
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   443
 else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   444
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   445
fun delSE th
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   446
          (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   447
	            safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) =
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   448
 if mem_thm (th, safeEs) then
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   449
   let val (safe0_rls, safep_rls) = partition (fn rl => nprems_of rl=1) [th]
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   450
   in CS{safe0_netpair = delete ([], safe0_rls) safe0_netpair,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   451
	 safep_netpair = delete ([], safep_rls) safep_netpair,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   452
	 safeIs	= safeIs,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   453
	 safeEs	= rem_thm (safeEs,th),
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   454
	 hazIs	= hazIs,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   455
	 hazEs	= hazEs,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   456
	 uwrapper     = uwrapper,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   457
	 swrapper     = swrapper,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   458
	 haz_netpair  = haz_netpair,
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   459
	 dup_netpair  = dup_netpair}
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   460
   end
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   461
 else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   462
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   463
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   464
fun delI th
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   465
         (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   466
	           safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) =
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   467
 if mem_thm (th, hazIs) then
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   468
     CS{haz_netpair = delete ([th], []) haz_netpair,
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   469
	dup_netpair = delete ([dup_intr th], []) dup_netpair,
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   470
	safeIs 	= safeIs, 
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   471
	safeEs	= safeEs,
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   472
	hazIs	= rem_thm (hazIs,th),
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   473
	hazEs	= hazEs,
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   474
	uwrapper      = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   475
	swrapper      = swrapper,
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   476
	safe0_netpair = safe0_netpair,
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   477
	safep_netpair = safep_netpair}
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   478
 else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   479
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   480
fun delE th
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   481
	 (cs as CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper, 
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   482
	           safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) =
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   483
 if mem_thm (th, hazEs) then
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   484
     CS{haz_netpair = delete ([], [th]) haz_netpair,
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   485
	dup_netpair = delete ([], [dup_elim th]) dup_netpair,
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   486
	safeIs	= safeIs, 
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   487
	safeEs	= safeEs,
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   488
	hazIs	= hazIs,
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   489
	hazEs	= rem_thm (hazEs,th),
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   490
	uwrapper      = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   491
	swrapper      = swrapper,
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   492
	safe0_netpair = safe0_netpair,
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   493
	safep_netpair = safep_netpair}
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   494
 else cs;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   495
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   496
(*Delete ALL occurrences of "th" in the claset (perhaps from several lists)*)
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   497
fun delrule (cs as CS{safeIs, safeEs, hazIs, hazEs, ...}, th) =
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   498
       if mem_thm (th, safeIs) orelse mem_thm (th, safeEs) orelse
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   499
	  mem_thm (th, hazIs)  orelse mem_thm (th, hazEs) 
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   500
       then delSI th (delSE th (delI th (delE th cs)))
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   501
       else (warning ("Rule not in claset\n" ^ (string_of_thm th)); 
2813
cc4c816dafdc delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents: 2689
diff changeset
   502
	     cs);
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   503
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   504
val op delrules = foldl delrule;
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   505
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   506
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   507
(*** Setting or modifying the wrapper tacticals ***)
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   508
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   509
(*Set a new uwrapper*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   510
fun (CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   511
	safe0_netpair, safep_netpair, haz_netpair, dup_netpair, ...}) 
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   512
    setWrapper new_uwrapper  =
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   513
  CS{safeIs	= safeIs,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   514
     safeEs	= safeEs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   515
     hazIs	= hazIs,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   516
     hazEs	= hazEs,
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   517
     uwrapper 	= new_uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   518
     swrapper   = swrapper,
1073
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   519
     safe0_netpair = safe0_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   520
     safep_netpair = safep_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   521
     haz_netpair = haz_netpair,
b3f190995bc9 Recoded addSIs, etc., so that nets are built incrementally
lcp
parents: 1010
diff changeset
   522
     dup_netpair = dup_netpair};
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   523
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   524
(*Set a new swrapper*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   525
fun (CS{safeIs, safeEs, hazIs, hazEs, uwrapper, swrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   526
	safe0_netpair, safep_netpair, haz_netpair, dup_netpair, ...}) 
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   527
    setSWrapper new_swrapper  =
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   528
  CS{safeIs	= safeIs,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   529
     safeEs	= safeEs,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   530
     hazIs	= hazIs,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   531
     hazEs	= hazEs,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   532
     uwrapper   = uwrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   533
     swrapper   = new_swrapper,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   534
     safe0_netpair = safe0_netpair,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   535
     safep_netpair = safep_netpair,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   536
     haz_netpair = haz_netpair,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   537
     dup_netpair = dup_netpair};
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   538
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   539
(*Compose a tactical with the existing uwrapper*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   540
fun cs compWrapper  uwrapper' = cs setWrapper  (uwrapper' o getWrapper cs);
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   541
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   542
(*Compose a tactical with the existing swrapper*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   543
fun cs compSWrapper swrapper' = cs setSWrapper (swrapper' o getSWrapper cs);
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   544
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   545
(*compose a safe tactic sequentially before/alternatively after safe_step_tac*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   546
fun cs addSbefore tac1 = cs compSWrapper (fn tac2 => tac1 THEN_MAYBE' tac2);
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   547
fun cs addSaltern tac2 = cs compSWrapper (fn tac1 => tac1 ORELSE'     tac2);
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   548
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   549
(*compose a tactic sequentially before/alternatively after the step tactic*)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   550
fun cs addbefore  tac1 = cs compWrapper  (fn tac2 => tac1 THEN_MAYBE' tac2);
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   551
fun cs addaltern  tac2 = cs compWrapper  (fn tac1 => tac1 APPEND'     tac2);
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   552
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   553
(*Merge works by adding all new rules of the 2nd claset into the 1st claset.
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   554
  Merging the term nets may look more efficient, but the rather delicate
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   555
  treatment of priority might get muddled up.*)
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   556
fun merge_cs
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   557
    (cs as CS{safeIs, safeEs, hazIs, hazEs, ...},
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   558
     CS{safeIs=safeIs2, safeEs=safeEs2, hazIs=hazIs2, hazEs=hazEs2,...}) =
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   559
  let val safeIs' = gen_rems eq_thm (safeIs2,safeIs)
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   560
      val safeEs' = gen_rems eq_thm (safeEs2,safeEs)
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   561
      val  hazIs' = gen_rems eq_thm ( hazIs2, hazIs)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   562
      val  hazEs' = gen_rems eq_thm ( hazEs2, hazEs)
1711
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   563
  in cs addSIs safeIs'
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   564
        addSEs safeEs'
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   565
        addIs  hazIs'
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   566
        addEs  hazEs'
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   567
  end;
c06d01f75764 Provides merge_cs to support default clasets
paulson
parents: 1587
diff changeset
   568
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   569
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   570
(**** Simple tactics for theorem proving ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   571
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   572
(*Attack subgoals using safe inferences -- matching, not resolution*)
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   573
fun safe_step_tac (cs as CS{safe0_netpair,safep_netpair,...}) = 
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   574
  getSWrapper cs (FIRST' [
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   575
	eq_assume_tac,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   576
	eq_mp_tac,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   577
	bimatch_from_nets_tac safe0_netpair,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   578
	FIRST' hyp_subst_tacs,
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   579
	bimatch_from_nets_tac safep_netpair]);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   580
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   581
(*Repeatedly attack subgoals using safe inferences -- it's deterministic!*)
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   582
fun safe_tac cs = REPEAT_DETERM_FIRST 
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   583
	(fn i => COND (has_fewer_prems i) no_tac (safe_step_tac cs i));
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   584
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   585
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   586
(*** Clarify_tac: do safe steps without causing branching ***)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   587
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   588
fun nsubgoalsP n (k,brl) = (subgoals_of_brl brl = n);
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   589
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   590
(*version of bimatch_from_nets_tac that only applies rules that
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   591
  create precisely n subgoals.*)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   592
fun n_bimatch_from_nets_tac n = 
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   593
    biresolution_from_nets_tac (orderlist o filter (nsubgoalsP n)) true;
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   594
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   595
fun eq_contr_tac i = ematch_tac [not_elim] i  THEN  eq_assume_tac i;
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   596
val eq_assume_contr_tac = eq_assume_tac ORELSE' eq_contr_tac;
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   597
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   598
(*Two-way branching is allowed only if one of the branches immediately closes*)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   599
fun bimatch2_tac netpair i =
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   600
    n_bimatch_from_nets_tac 2 netpair i THEN
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   601
    (eq_assume_contr_tac i ORELSE eq_assume_contr_tac (i+1));
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   602
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   603
(*Attack subgoals using safe inferences -- matching, not resolution*)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   604
fun clarify_step_tac (cs as CS{safe0_netpair,safep_netpair,...}) = 
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   605
  getSWrapper cs (FIRST' [
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   606
	eq_assume_contr_tac,
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   607
	bimatch_from_nets_tac safe0_netpair,
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   608
	FIRST' hyp_subst_tacs,
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   609
	n_bimatch_from_nets_tac 1 safep_netpair,
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   610
        bimatch2_tac safep_netpair]);
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   611
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   612
fun clarify_tac cs = SELECT_GOAL (REPEAT_DETERM (clarify_step_tac cs 1));
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   613
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   614
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   615
(*** Unsafe steps instantiate variables or lose information ***)
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   616
4066
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   617
(*Backtracking is allowed among the various these unsafe ways of
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   618
  proving a subgoal.  *)
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   619
fun inst0_step_tac (CS{safe0_netpair,safep_netpair,...}) =
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   620
  assume_tac 			  APPEND' 
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   621
  contr_tac 			  APPEND' 
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   622
  biresolve_from_nets_tac safe0_netpair;
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   623
4066
7b508ac609f7 Fixed comments
paulson
parents: 3727
diff changeset
   624
(*These unsafe steps could generate more subgoals.*)
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   625
fun instp_step_tac (CS{safep_netpair,...}) =
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   626
  biresolve_from_nets_tac safep_netpair;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   627
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   628
(*These steps could instantiate variables and are therefore unsafe.*)
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   629
fun inst_step_tac cs = inst0_step_tac cs APPEND' instp_step_tac cs;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   630
982
4fe0b642b7d5 Addition of wrappers for integration with the simplifier.
lcp
parents: 747
diff changeset
   631
fun haz_step_tac (CS{haz_netpair,...}) = 
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   632
  biresolve_from_nets_tac haz_netpair;
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   633
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   634
(*Single step for the prover.  FAILS unless it makes progress. *)
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   635
fun step_tac cs i = getWrapper cs 
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   636
	(K (safe_tac cs) ORELSE' (inst_step_tac cs ORELSE' haz_step_tac cs)) i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   637
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   638
(*Using a "safe" rule to instantiate variables is unsafe.  This tactic
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   639
  allows backtracking from "safe" rules to "unsafe" rules here.*)
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   640
fun slow_step_tac cs i = getWrapper cs 
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   641
	(K (safe_tac cs) ORELSE' (inst_step_tac cs APPEND' haz_step_tac cs)) i;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   642
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   643
(**** The following tactics all fail unless they solve one goal ****)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   644
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   645
(*Dumb but fast*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   646
fun fast_tac cs = SELECT_GOAL (DEPTH_SOLVE (step_tac cs 1));
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   647
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   648
(*Slower but smarter than fast_tac*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   649
fun best_tac cs = 
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   650
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, sizef) (step_tac cs 1));
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   651
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   652
fun slow_tac cs = SELECT_GOAL (DEPTH_SOLVE (slow_step_tac cs 1));
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   653
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   654
fun slow_best_tac cs = 
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   655
  SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, sizef) (slow_step_tac cs 1));
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   656
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   657
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   658
(***ASTAR with weight weight_ASTAR, by Norbert Voelker*) 
1587
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   659
val weight_ASTAR = ref 5; 
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   660
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   661
fun astar_tac cs = 
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   662
  SELECT_GOAL ( ASTAR (has_fewer_prems 1
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   663
	      , fn level =>(fn thm =>size_of_thm thm + !weight_ASTAR *level)) 
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   664
	      (step_tac cs 1));
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   665
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   666
fun slow_astar_tac cs = 
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   667
  SELECT_GOAL ( ASTAR (has_fewer_prems 1
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   668
	      , fn level =>(fn thm =>size_of_thm thm + !weight_ASTAR *level)) 
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   669
	      (slow_step_tac cs 1));
e7d8a4957bac Now provides astar versions (thanks to Norbert Voelker)
paulson
parents: 1524
diff changeset
   670
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   671
(**** Complete tactic, loosely based upon LeanTaP.  This tactic is the outcome
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   672
  of much experimentation!  Changing APPEND to ORELSE below would prove
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   673
  easy theorems faster, but loses completeness -- and many of the harder
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   674
  theorems such as 43. ****)
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   675
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   676
(*Non-deterministic!  Could always expand the first unsafe connective.
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   677
  That's hard to implement and did not perform better in experiments, due to
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   678
  greater search depth required.*)
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   679
fun dup_step_tac (cs as (CS{dup_netpair,...})) = 
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   680
  biresolve_from_nets_tac dup_netpair;
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   681
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   682
(*Searching to depth m.*)
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 3204
diff changeset
   683
fun depth_tac cs m i state = 
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   684
  SELECT_GOAL 
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   685
   (getWrapper cs
3204
c1653e2e146d corrected depth_tac: no call for safe_step_tac if subgoal not present
oheimb
parents: 2868
diff changeset
   686
    (fn i => REPEAT_DETERM1 (COND (has_fewer_prems i) no_tac
c1653e2e146d corrected depth_tac: no call for safe_step_tac if subgoal not present
oheimb
parents: 2868
diff changeset
   687
			     (safe_step_tac cs i)) THEN_ELSE
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   688
     (DEPTH_SOLVE (depth_tac cs m i),
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   689
      inst0_step_tac cs i  APPEND
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   690
      COND (K(m=0)) no_tac
2630
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   691
        ((instp_step_tac cs i APPEND dup_step_tac cs i)
7a962f6829ca moved THEN_MAYBE to Pure/tctical.ML
oheimb
parents: 2173
diff changeset
   692
	 THEN DEPTH_SOLVE (depth_tac cs (m-1) i)))) 1)
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 3204
diff changeset
   693
  i state;
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   694
2173
08c68550460b Added a comment
paulson
parents: 2066
diff changeset
   695
(*Search, with depth bound m.  
08c68550460b Added a comment
paulson
parents: 2066
diff changeset
   696
  This is the "entry point", which does safe inferences first.*)
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   697
fun safe_depth_tac cs m = 
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   698
  SUBGOAL 
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   699
    (fn (prem,i) =>
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   700
      let val deti =
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   701
	  (*No Vars in the goal?  No need to backtrack between goals.*)
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   702
	  case term_vars prem of
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   703
	      []	=> DETERM 
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   704
	    | _::_	=> I
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   705
      in  SELECT_GOAL (TRY (safe_tac cs) THEN 
747
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   706
		       DEPTH_SOLVE (deti (depth_tac cs m 1))) i
bdc066781063 deepen_tac: modified due to outcome of experiments. Its
lcp
parents: 681
diff changeset
   707
      end);
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   708
2868
17a23a62f82a New DEEPEN allows giving an upper bound for deepen_tac
paulson
parents: 2813
diff changeset
   709
fun deepen_tac cs = DEEPEN (2,10) (safe_depth_tac cs);
681
9b02474744ca Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents: 469
diff changeset
   710
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   711
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   712
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   713
(** claset theory data **)
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   714
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   715
(* init data kind claset *)
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   716
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   717
exception CSData of claset ref;
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   718
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   719
local
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   720
  val empty = CSData (ref empty_cs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   721
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   722
  (*create new references*)
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   723
  fun prep_ext (ClasetData (ref (CSData (ref cs)))) =
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   724
    ClasetData (ref (CSData (ref cs)));
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   725
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   726
  fun merge (ClasetData (ref (CSData (ref cs1))), ClasetData (ref (CSData (ref cs2)))) =
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   727
    ClasetData (ref (CSData (ref (merge_cs (cs1, cs2)))));
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   728
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   729
  fun print (ClasetData (ref (CSData (ref cs)))) = print_cs cs;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   730
in
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   731
  val _ = fix_methods (empty, prep_ext, merge, print);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   732
end;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   733
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   734
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   735
(* access claset *)
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   736
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   737
fun claset_ref_of_sg sg =
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   738
  (case Sign.get_data sg clasetK of
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   739
    ClasetData (ref (CSData r)) => r
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   740
  | _ => sys_error "claset_ref_of_sg");
1807
3ff66483a8d4 Now exports Delrules
paulson
parents: 1800
diff changeset
   741
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   742
val claset_ref_of = claset_ref_of_sg o sign_of;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   743
val claset_of_sg = ! o claset_ref_of_sg;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   744
val claset_of = claset_of_sg o sign_of;
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   745
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   746
fun CLASET tacf state = tacf (claset_of_sg (sign_of_thm state)) state;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   747
fun CLASET' tacf i state = tacf (claset_of_sg (sign_of_thm state)) i state;
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   748
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   749
val claset = claset_of o Context.get_context;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   750
val claset_ref = claset_ref_of_sg o sign_of o Context.get_context;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   751
3705
76f3b2803982 Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents: 3546
diff changeset
   752
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   753
(* change claset *)
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   754
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   755
fun change_claset f x = claset_ref () := (f (claset (), x));
1724
bb02e6976258 Added functions for default claset.
berghofe
parents: 1711
diff changeset
   756
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   757
val AddDs = change_claset (op addDs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   758
val AddEs = change_claset (op addEs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   759
val AddIs = change_claset (op addIs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   760
val AddSDs = change_claset (op addSDs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   761
val AddSEs = change_claset (op addSEs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   762
val AddSIs = change_claset (op addSIs);
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   763
val Delrules = change_claset (op delrules);
3727
ed63c05d7992 Added Safe_tac; all other default claset tactics now dereference "claset"
paulson
parents: 3705
diff changeset
   764
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   765
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   766
(* tactics referring to the implicit claset *)
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   767
4079
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   768
(*the abstraction over the proof state delays the dereferencing*)
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   769
fun Safe_tac st		  = safe_tac (claset()) st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   770
fun Safe_step_tac i st	  = safe_step_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   771
fun Clarify_step_tac i st = clarify_step_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   772
fun Clarify_tac i st	  = clarify_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   773
fun Step_tac i st	  = step_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   774
fun Fast_tac i st	  = fast_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   775
fun Best_tac i st	  = best_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   776
fun Slow_tac i st	  = slow_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   777
fun Slow_best_tac i st	  = slow_best_tac (claset()) i st;
9df5e4f22d96 new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents: 4066
diff changeset
   778
fun Deepen_tac m	  = deepen_tac (claset()) m;
2066
b9063086ef56 Introduction of Slow_tac and Slow_best_tac
paulson
parents: 1938
diff changeset
   779
1800
3d9d2ef0cd3b Now implements delrules
paulson
parents: 1724
diff changeset
   780
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   781
end; 
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   782
end;