src/Provers/splitter.ML
author wenzelm
Sun, 07 Mar 2010 12:19:47 +0100
changeset 35625 9c818cab0dd0
parent 33955 fff6f11b1f09
child 42364 8c674b3b8e44
permissions -rw-r--r--
modernized structure Object_Logic;
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
32174
9036cc8ae775 explicit OldGoals;
wenzelm
parents: 30722
diff changeset
     1
(*  Title:      Provers/splitter.ML
4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     2
    Author:     Tobias Nipkow
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
     3
    Copyright   1995  TU Munich
4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     5
Generic case-splitter, suitable for most logics.
13157
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
     6
Deals with equalities of the form ?P(f args) = ...
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
     7
where "f args" must be a first-order term without duplicate variables.
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     8
*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     9
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    10
infix 4 addsplits delsplits;
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    11
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    12
signature SPLITTER_DATA =
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    13
sig
32177
bc02c5bfcb5b renamed functor SplitterFun to Splitter, require explicit theory;
wenzelm
parents: 32174
diff changeset
    14
  val thy           : theory
5553
ae42b36a50c2 renamed mk_meta_eq to mk_eq
oheimb
parents: 5437
diff changeset
    15
  val mk_eq         : thm -> thm
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    16
  val meta_eq_to_iff: thm (* "x == y ==> x = y"                      *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    17
  val iffD          : thm (* "[| P = Q; Q |] ==> P"                  *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    18
  val disjE         : thm (* "[| P | Q; P ==> R; Q ==> R |] ==> R"   *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    19
  val conjE         : thm (* "[| P & Q; [| P; Q |] ==> R |] ==> R"   *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    20
  val exE           : thm (* "[| EX x. P x; !!x. P x ==> Q |] ==> Q" *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    21
  val contrapos     : thm (* "[| ~ Q; P ==> Q |] ==> ~ P"            *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    22
  val contrapos2    : thm (* "[| Q; ~ P ==> ~ Q |] ==> P"            *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    23
  val notnotD       : thm (* "~ ~ P ==> P"                           *)
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    24
end
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    25
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    26
signature SPLITTER =
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    27
sig
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    28
  (* somewhat more internal functions *)
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    29
  val cmap_of_split_thms: thm list -> (string * (typ * term * thm * typ * int) list) list
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    30
  val split_posns: (string * (typ * term * thm * typ * int) list) list ->
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    31
    theory -> typ list -> term -> (thm * (typ * typ * int list) list * int list * typ * term) list
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    32
    (* first argument is a "cmap", returns a list of "split packs" *)
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    33
  (* the "real" interface, providing a number of tactics *)
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    34
  val split_tac       : thm list -> int -> tactic
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    35
  val split_inside_tac: thm list -> int -> tactic
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    36
  val split_asm_tac   : thm list -> int -> tactic
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    37
  val addsplits       : simpset * thm list -> simpset
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    38
  val delsplits       : simpset * thm list -> simpset
18728
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
    39
  val split_add: attribute
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
    40
  val split_del: attribute
30513
1796b8ea88aa eliminated type Args.T;
wenzelm
parents: 30510
diff changeset
    41
  val split_modifiers : Method.modifier parser list
18708
4b3dadb4fe33 setup: theory -> theory;
wenzelm
parents: 18688
diff changeset
    42
  val setup: theory -> theory
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    43
end;
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    44
32177
bc02c5bfcb5b renamed functor SplitterFun to Splitter, require explicit theory;
wenzelm
parents: 32174
diff changeset
    45
functor Splitter(Data: SPLITTER_DATA): SPLITTER =
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
    46
struct
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    47
18545
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
    48
val Const (const_not, _) $ _ =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 33955
diff changeset
    49
  Object_Logic.drop_judgment Data.thy
18545
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
    50
    (#1 (Logic.dest_implies (Thm.prop_of Data.notnotD)));
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    51
18545
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
    52
val Const (const_or , _) $ _ $ _ =
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 33955
diff changeset
    53
  Object_Logic.drop_judgment Data.thy
18545
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
    54
    (#1 (Logic.dest_implies (Thm.prop_of Data.disjE)));
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
    55
35625
9c818cab0dd0 modernized structure Object_Logic;
wenzelm
parents: 33955
diff changeset
    56
val const_Trueprop = Object_Logic.judgment_name Data.thy;
18545
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
    57
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
    58
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    59
fun split_format_err () = error "Wrong format for split rule";
4668
131989b78417 Little reorganization. Loop tactics have names now.
nipkow
parents: 4519
diff changeset
    60
5553
ae42b36a50c2 renamed mk_meta_eq to mk_eq
oheimb
parents: 5437
diff changeset
    61
fun split_thm_info thm = case concl_of (Data.mk_eq thm) of
13855
644692eca537 addsplits / delsplits no longer ignore type of constant.
berghofe
parents: 13157
diff changeset
    62
     Const("==", _) $ (Var _ $ t) $ c => (case strip_comb t of
644692eca537 addsplits / delsplits no longer ignore type of constant.
berghofe
parents: 13157
diff changeset
    63
       (Const p, _) => (p, case c of (Const (s, _) $ _) => s = const_not | _ => false)
644692eca537 addsplits / delsplits no longer ignore type of constant.
berghofe
parents: 13157
diff changeset
    64
     | _ => split_format_err ())
644692eca537 addsplits / delsplits no longer ignore type of constant.
berghofe
parents: 13157
diff changeset
    65
   | _ => split_format_err ();
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    66
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    67
fun cmap_of_split_thms thms =
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    68
let
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    69
  val splits = map Data.mk_eq thms
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    70
  fun add_thm thm cmap =
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    71
    (case concl_of thm of _ $ (t as _ $ lhs) $ _ =>
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    72
       (case strip_comb lhs of (Const(a,aT),args) =>
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    73
          let val info = (aT,lhs,thm,fastype_of t,length args)
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    74
          in case AList.lookup (op =) cmap a of
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    75
               SOME infos => AList.update (op =) (a, info::infos) cmap
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    76
             | NONE => (a,[info])::cmap
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    77
          end
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    78
        | _ => split_format_err())
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    79
     | _ => split_format_err())
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    80
in
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
    81
  fold add_thm splits []
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    82
end;
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    83
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    84
(* ------------------------------------------------------------------------- *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    85
(* mk_case_split_tac                                                         *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    86
(* ------------------------------------------------------------------------- *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    87
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    88
fun mk_case_split_tac order =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    89
let
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    90
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    91
(************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    92
   Create lift-theorem "trlift" :
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    93
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
    94
   [| !!x. Q x == R x; P(%x. R x) == C |] ==> P (%x. Q x) == C
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    95
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    96
*************************************************************)
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
    97
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    98
val meta_iffD = Data.meta_eq_to_iff RS Data.iffD;  (* (P == Q) ==> Q ==> P *)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
    99
22838
haftmann
parents: 22675
diff changeset
   100
val lift = Goal.prove_global Pure.thy ["P", "Q", "R"]
24707
dfeb98f84e93 Syntax.parse/check/read;
wenzelm
parents: 22838
diff changeset
   101
  [Syntax.read_prop_global Pure.thy "!!x :: 'b. Q(x) == R(x) :: 'c"]
dfeb98f84e93 Syntax.parse/check/read;
wenzelm
parents: 22838
diff changeset
   102
  (Syntax.read_prop_global Pure.thy "P(%x. Q(x)) == P(%x. R(x))")
28839
32d498cf7595 eliminated rewrite_tac/fold_tac, which are not well-formed tactics due to change of main conclusion;
wenzelm
parents: 26711
diff changeset
   103
  (fn {prems, ...} => rewrite_goals_tac prems THEN rtac reflexive_thm 1)
4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
   104
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   105
val trlift = lift RS transitive_thm;
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   106
val _ $ (P $ _) $ _ = concl_of trlift;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   107
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   108
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   109
(************************************************************************
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   110
   Set up term for instantiation of P in the lift-theorem
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   111
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   112
   Ts    : types of parameters (i.e. variables bound by meta-quantifiers)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   113
   t     : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   114
           the lift theorem is applied to (see select)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   115
   pos   : "path" leading to abstraction, coded as a list
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   116
   T     : type of body of P(...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   117
   maxi  : maximum index of Vars
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   118
*************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   119
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   120
fun mk_cntxt Ts t pos T maxi =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   121
  let fun var (t,i) = Var(("X",i),type_of1(Ts,t));
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   122
      fun down [] t i = Bound 0
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   123
        | down (p::ps) t i =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   124
            let val (h,ts) = strip_comb t
33955
fff6f11b1f09 curried take/drop
haftmann
parents: 33317
diff changeset
   125
                val v1 = ListPair.map var (take p ts, i upto (i+p-1))
fff6f11b1f09 curried take/drop
haftmann
parents: 33317
diff changeset
   126
                val u::us = drop p ts
2266
82aef6857c5b Replaced map...~~ by ListPair.map
paulson
parents: 2143
diff changeset
   127
                val v2 = ListPair.map var (us, (i+p) upto (i+length(ts)-2))
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   128
      in list_comb(h,v1@[down ps u (i+length ts)]@v2) end;
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   129
  in Abs("", T, down (rev pos) t maxi) end;
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   130
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   131
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   132
(************************************************************************
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   133
   Set up term for instantiation of P in the split-theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   134
   P(...) == rhs
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   135
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   136
   t     : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   137
           the split theorem is applied to (see select)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   138
   T     : type of body of P(...)
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   139
   tt    : the term  Const(key,..) $ ...
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   140
*************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   141
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   142
fun mk_cntxt_splitthm t tt T =
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   143
  let fun repl lev t =
29548
02a52ae34b7a bug fixes
nipkow@lapbroy100.local
parents: 28839
diff changeset
   144
    if Pattern.aeconv(incr_boundvars lev tt, t) then Bound lev
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   145
    else case t of
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   146
        (Abs (v, T2, t)) => Abs (v, T2, repl (lev+1) t)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   147
      | (Bound i) => Bound (if i>=lev then i+1 else i)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   148
      | (t1 $ t2) => (repl lev t1) $ (repl lev t2)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   149
      | t => t
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   150
  in Abs("", T, repl 0 t) end;
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   151
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   152
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   153
(* add all loose bound variables in t to list is *)
33245
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   154
fun add_lbnos t is = add_loose_bnos (t, 0, is);
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   155
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   156
(* check if the innermost abstraction that needs to be removed
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   157
   has a body of type T; otherwise the expansion thm will fail later on
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   158
*)
33029
2fefe039edf1 uniform use of Integer.min/max;
wenzelm
parents: 32177
diff changeset
   159
fun type_test (T, lbnos, apsns) =
2fefe039edf1 uniform use of Integer.min/max;
wenzelm
parents: 32177
diff changeset
   160
  let val (_, U: typ, _) = List.nth (apsns, foldl1 Int.min lbnos)
2fefe039edf1 uniform use of Integer.min/max;
wenzelm
parents: 32177
diff changeset
   161
  in T = U end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   162
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   163
(*************************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   164
   Create a "split_pack".
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   165
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   166
   thm   : the relevant split-theorem, i.e. P(...) == rhs , where P(...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   167
           is of the form
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   168
           P( Const(key,...) $ t_1 $ ... $ t_n )      (e.g. key = "if")
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   169
   T     : type of P(...)
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   170
   T'    : type of term to be scanned
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   171
   n     : number of arguments expected by Const(key,...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   172
   ts    : list of arguments actually found
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   173
   apsns : list of tuples of the form (T,U,pos), one tuple for each
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   174
           abstraction that is encountered on the way to the position where
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   175
           Const(key, ...) $ ...  occurs, where
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   176
           T   : type of the variable bound by the abstraction
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   177
           U   : type of the abstraction's body
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   178
           pos : "path" leading to the body of the abstraction
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   179
   pos   : "path" leading to the position where Const(key, ...) $ ...  occurs.
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   180
   TB    : type of  Const(key,...) $ t_1 $ ... $ t_n
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   181
   t     : the term Const(key,...) $ t_1 $ ... $ t_n
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   182
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   183
   A split pack is a tuple of the form
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   184
   (thm, apsns, pos, TB, tt)
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   185
   Note : apsns is reversed, so that the outermost quantifier's position
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   186
          comes first ! If the terms in ts don't contain variables bound
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   187
          by other than meta-quantifiers, apsns is empty, because no further
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   188
          lifting is required before applying the split-theorem.
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   189
******************************************************************************)
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   190
20664
ffbc5a57191a member (op =);
wenzelm
parents: 20237
diff changeset
   191
fun mk_split_pack (thm, T: typ, T', n, ts, apsns, pos, TB, t) =
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   192
  if n > length ts then []
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   193
  else let val lev = length apsns
33955
fff6f11b1f09 curried take/drop
haftmann
parents: 33317
diff changeset
   194
           val lbnos = fold add_lbnos (take n ts) []
33317
b4534348b8fd standardized filter/filter_out;
wenzelm
parents: 33245
diff changeset
   195
           val flbnos = filter (fn i => i < lev) lbnos
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   196
           val tt = incr_boundvars (~lev) t
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   197
       in if null flbnos then
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   198
            if T = T' then [(thm,[],pos,TB,tt)] else []
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   199
          else if type_test(T,flbnos,apsns) then [(thm, rev apsns,pos,TB,tt)]
2143
093bbe6d333b Replaced min by Int.min
paulson
parents: 1721
diff changeset
   200
               else []
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   201
       end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   202
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   203
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   204
(****************************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   205
   Recursively scans term for occurences of Const(key,...) $ ...
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   206
   Returns a list of "split-packs" (one for each occurence of Const(key,...) )
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   207
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   208
   cmap : association list of split-theorems that should be tried.
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   209
          The elements have the format (key,(thm,T,n)) , where
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   210
          key : the theorem's key constant ( Const(key,...) $ ... )
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   211
          thm : the theorem itself
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   212
          T   : type of P( Const(key,...) $ ... )
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   213
          n   : number of arguments expected by Const(key,...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   214
   Ts   : types of parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   215
   t    : the term to be scanned
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   216
******************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   217
13157
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   218
(* Simplified first-order matching;
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   219
   assumes that all Vars in the pattern are distinct;
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   220
   see Pure/pattern.ML for the full version;
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   221
*)
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   222
local
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   223
  exception MATCH
13157
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   224
in
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   225
  fun typ_match sg (tyenv, TU) = (Sign.typ_match sg TU tyenv)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   226
                            handle Type.TYPE_MATCH => raise MATCH
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   227
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   228
  fun fomatch sg args =
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   229
    let
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   230
      fun mtch tyinsts = fn
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   231
          (Ts, Var(_,T), t) =>
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   232
            typ_match sg (tyinsts, (T, fastype_of1(Ts,t)))
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   233
        | (_, Free (a,T), Free (b,U)) =>
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   234
            if a=b then typ_match sg (tyinsts,(T,U)) else raise MATCH
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   235
        | (_, Const (a,T), Const (b,U)) =>
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   236
            if a=b then typ_match sg (tyinsts,(T,U)) else raise MATCH
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   237
        | (_, Bound i, Bound j) =>
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   238
            if i=j then tyinsts else raise MATCH
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   239
        | (Ts, Abs(_,T,t), Abs(_,U,u)) =>
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   240
            mtch (typ_match sg (tyinsts,(T,U))) (U::Ts,t,u)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   241
        | (Ts, f$t, g$u) =>
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   242
            mtch (mtch tyinsts (Ts,f,g)) (Ts, t, u)
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   243
        | _ => raise MATCH
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   244
    in (mtch Vartab.empty args; true) handle MATCH => false end;
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   245
end;
13157
4a4599f78f18 allowed more general split rules to cope with div/mod 2
nipkow
parents: 10821
diff changeset
   246
20237
5daab2c78b8e type annotation added to make SML/NJ happy
webertj
parents: 20217
diff changeset
   247
fun split_posns (cmap : (string * (typ * term * thm * typ * int) list) list) sg Ts t =
6130
30b84ad2131d Fixed old bug: selection of constant to be split should depend not just on
nipkow
parents: 5553
diff changeset
   248
  let
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   249
    val T' = fastype_of1 (Ts, t);
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   250
    fun posns Ts pos apsns (Abs (_, T, t)) =
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   251
          let val U = fastype_of1 (T::Ts,t)
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   252
          in posns (T::Ts) (0::pos) ((T, U, pos)::apsns) t end
6130
30b84ad2131d Fixed old bug: selection of constant to be split should depend not just on
nipkow
parents: 5553
diff changeset
   253
      | posns Ts pos apsns t =
30b84ad2131d Fixed old bug: selection of constant to be split should depend not just on
nipkow
parents: 5553
diff changeset
   254
          let
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   255
            val (h, ts) = strip_comb t
33245
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   256
            fun iter t (i, a) = (i+1, (posns Ts (i::pos) apsns t) @ a);
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   257
            val a =
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   258
              case h of
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   259
                Const(c, cT) =>
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   260
                  let fun find [] = []
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   261
                        | find ((gcT, pat, thm, T, n)::tups) =
33955
fff6f11b1f09 curried take/drop
haftmann
parents: 33317
diff changeset
   262
                            let val t2 = list_comb (h, take n ts)
33245
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   263
                            in if Sign.typ_instance sg (cT, gcT)
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   264
                                  andalso fomatch sg (Ts,pat,t2)
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   265
                               then mk_split_pack(thm,T,T',n,ts,apsns,pos,type_of1(Ts,t2),t2)
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   266
                               else find tups
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   267
                            end
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   268
                  in find (these (AList.lookup (op =) cmap c)) end
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   269
              | _ => []
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   270
          in snd (fold iter ts (0, a)) end
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   271
  in posns Ts [] [] t end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   272
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   273
fun nth_subgoal i thm = List.nth (prems_of thm, i-1);
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   274
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   275
fun shorter ((_,ps,pos,_,_), (_,qs,qos,_,_)) =
4519
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   276
  prod_ord (int_ord o pairself length) (order o pairself length)
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   277
    ((ps, pos), (qs, qos));
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   278
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   279
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   280
(************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   281
   call split_posns with appropriate parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   282
*************************************************************)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   283
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   284
fun select cmap state i =
22596
d0d2af4db18f rep_thm/cterm/ctyp: removed obsolete sign field;
wenzelm
parents: 22578
diff changeset
   285
  let val sg = Thm.theory_of_thm state
6130
30b84ad2131d Fixed old bug: selection of constant to be split should depend not just on
nipkow
parents: 5553
diff changeset
   286
      val goali = nth_subgoal i state
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   287
      val Ts = rev(map #2 (Logic.strip_params goali))
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   288
      val _ $ t $ _ = Logic.strip_assums_concl goali;
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   289
  in (Ts, t, sort shorter (split_posns cmap sg Ts t)) end;
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   290
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   291
fun exported_split_posns cmap sg Ts t =
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   292
  sort shorter (split_posns cmap sg Ts t);
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   293
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   294
(*************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   295
   instantiate lift theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   296
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   297
   if t is of the form
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   298
   ... ( Const(...,...) $ Abs( .... ) ) ...
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   299
   then
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   300
   P = %a.  ... ( Const(...,...) $ a ) ...
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   301
   where a has type T --> U
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   302
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   303
   Ts      : types of parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   304
   t       : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   305
             the split theorem is applied to (see cmap)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   306
   T,U,pos : see mk_split_pack
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   307
   state   : current proof state
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   308
   lift    : the lift theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   309
   i       : no. of subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   310
**************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   311
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   312
fun inst_lift Ts t (T, U, pos) state i =
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   313
  let
22578
b0eb5652f210 removed obsolete sign_of/sign_of_thm;
wenzelm
parents: 21879
diff changeset
   314
    val cert = cterm_of (Thm.theory_of_thm state);
22596
d0d2af4db18f rep_thm/cterm/ctyp: removed obsolete sign field;
wenzelm
parents: 22578
diff changeset
   315
    val cntxt = mk_cntxt Ts t pos (T --> U) (Thm.maxidx_of trlift);
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   316
  in cterm_instantiate [(cert P, cert cntxt)] trlift
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   317
  end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   318
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   319
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   320
(*************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   321
   instantiate split theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   322
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   323
   Ts    : types of parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   324
   t     : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   325
           the split theorem is applied to (see cmap)
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   326
   tt    : the term  Const(key,..) $ ...
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   327
   thm   : the split theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   328
   TB    : type of body of P(...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   329
   state : current proof state
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   330
   i     : number of subgoal
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   331
**************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   332
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   333
fun inst_split Ts t tt thm TB state i =
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   334
  let
18145
6757627acf59 renamed Thm.cgoal_of to Thm.cprem_of;
wenzelm
parents: 18023
diff changeset
   335
    val thm' = Thm.lift_rule (Thm.cprem_of state i) thm;
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   336
    val (P, _) = strip_comb (fst (Logic.dest_equals
22596
d0d2af4db18f rep_thm/cterm/ctyp: removed obsolete sign field;
wenzelm
parents: 22578
diff changeset
   337
      (Logic.strip_assums_concl (Thm.prop_of thm'))));
22578
b0eb5652f210 removed obsolete sign_of/sign_of_thm;
wenzelm
parents: 21879
diff changeset
   338
    val cert = cterm_of (Thm.theory_of_thm state);
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   339
    val cntxt = mk_cntxt_splitthm t tt TB;
33245
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   340
    val abss = fold (fn T => fn t => Abs ("", T, t));
65232054ffd0 eliminated some old folds;
wenzelm
parents: 33242
diff changeset
   341
  in cterm_instantiate [(cert P, cert (abss Ts cntxt))] thm'
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   342
  end;
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   343
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   344
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   345
(*****************************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   346
   The split-tactic
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   347
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   348
   splits : list of split-theorems to be tried
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   349
   i      : number of subgoal the tactic should be applied to
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   350
*****************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   351
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   352
fun split_tac [] i = no_tac
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   353
  | split_tac splits i =
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   354
  let val cmap = cmap_of_split_thms splits
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   355
      fun lift_tac Ts t p st = rtac (inst_lift Ts t p st i) i st
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   356
      fun lift_split_tac state =
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   357
            let val (Ts, t, splits) = select cmap state i
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   358
            in case splits of
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   359
                 [] => no_tac state
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   360
               | (thm, apsns, pos, TB, tt)::_ =>
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   361
                   (case apsns of
7672
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   362
                      [] => compose_tac (false, inst_split Ts t tt thm TB state i, 0) i state
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   363
                    | p::_ => EVERY [lift_tac Ts t p,
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   364
                                     rtac reflexive_thm (i+1),
c092e67d12f8 - Fixed bug in mk_split_pack which caused application of expansion theorem
berghofe
parents: 6130
diff changeset
   365
                                     lift_split_tac] state)
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   366
            end
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   367
  in COND (has_fewer_prems i) no_tac
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   368
          (rtac meta_iffD i THEN lift_split_tac)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   369
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   370
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   371
in (split_tac, exported_split_posns) end;  (* mk_case_split_tac *)
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   372
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   373
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   374
val (split_tac, split_posns) = mk_case_split_tac int_ord;
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   375
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   376
val (split_inside_tac, _) = mk_case_split_tac (rev_order o int_ord);
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   377
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   378
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   379
(*****************************************************************************
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   380
   The split-tactic for premises
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   381
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   382
   splits : list of split-theorems to be tried
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   383
****************************************************************************)
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   384
fun split_asm_tac [] = K no_tac
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   385
  | split_asm_tac splits =
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   386
13855
644692eca537 addsplits / delsplits no longer ignore type of constant.
berghofe
parents: 13157
diff changeset
   387
  let val cname_list = map (fst o fst o split_thm_info) splits;
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   388
      fun tac (t,i) =
20664
ffbc5a57191a member (op =);
wenzelm
parents: 20237
diff changeset
   389
          let val n = find_index (exists_Const (member (op =) cname_list o #1))
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   390
                                 (Logic.strip_assums_hyp t);
18545
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
   391
              fun first_prem_is_disj (Const ("==>", _) $ (Const (c, _)
e2b09fda748c avoid hardwired Trueprop;
wenzelm
parents: 18145
diff changeset
   392
                    $ (Const (s, _) $ _ $ _ )) $ _ ) = c = const_Trueprop andalso s = const_or
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   393
              |   first_prem_is_disj (Const("all",_)$Abs(_,_,t)) =
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   394
                                        first_prem_is_disj t
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   395
              |   first_prem_is_disj _ = false;
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   396
      (* does not work properly if the split variable is bound by a quantifier *)
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   397
              fun flat_prems_tac i = SUBGOAL (fn (t,i) =>
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   398
                           (if first_prem_is_disj t
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   399
                            then EVERY[etac Data.disjE i,rotate_tac ~1 i,
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   400
                                       rotate_tac ~1  (i+1),
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   401
                                       flat_prems_tac (i+1)]
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   402
                            else all_tac)
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   403
                           THEN REPEAT (eresolve_tac [Data.conjE,Data.exE] i)
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   404
                           THEN REPEAT (dresolve_tac [Data.notnotD]   i)) i;
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   405
          in if n<0 then  no_tac  else (DETERM (EVERY'
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   406
                [rotate_tac n, etac Data.contrapos2,
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   407
                 split_tac splits,
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   408
                 rotate_tac ~1, etac Data.contrapos, rotate_tac ~1,
20217
25b068a99d2b linear arithmetic splits certain operators (e.g. min, max, abs)
webertj
parents: 18988
diff changeset
   409
                 flat_prems_tac] i))
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   410
          end;
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   411
  in SUBGOAL tac
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   412
  end;
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   413
10652
e6a4bb832b46 sar split method uses new gen_split_tac.
nipkow
parents: 10411
diff changeset
   414
fun gen_split_tac [] = K no_tac
e6a4bb832b46 sar split method uses new gen_split_tac.
nipkow
parents: 10411
diff changeset
   415
  | gen_split_tac (split::splits) =
e6a4bb832b46 sar split method uses new gen_split_tac.
nipkow
parents: 10411
diff changeset
   416
      let val (_,asm) = split_thm_info split
e6a4bb832b46 sar split method uses new gen_split_tac.
nipkow
parents: 10411
diff changeset
   417
      in (if asm then split_asm_tac else split_tac) [split] ORELSE'
e6a4bb832b46 sar split method uses new gen_split_tac.
nipkow
parents: 10411
diff changeset
   418
         gen_split_tac splits
e6a4bb832b46 sar split method uses new gen_split_tac.
nipkow
parents: 10411
diff changeset
   419
      end;
8468
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   420
18688
abf0f018b5ec generic attributes;
wenzelm
parents: 18545
diff changeset
   421
8468
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   422
(** declare split rules **)
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   423
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   424
(* addsplits / delsplits *)
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   425
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   426
fun string_of_typ (Type (s, Ts)) =
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   427
      (if null Ts then "" else enclose "(" ")" (commas (map string_of_typ Ts))) ^ s
13859
adf68d9e5dec split_name no longer uses Sign.string_of_typ to encode types, since
berghofe
parents: 13855
diff changeset
   428
  | string_of_typ _ = "_";
adf68d9e5dec split_name no longer uses Sign.string_of_typ to encode types, since
berghofe
parents: 13855
diff changeset
   429
17881
2b3709f5e477 functor: no Simplifier argument;
wenzelm
parents: 17325
diff changeset
   430
fun split_name (name, T) asm = "split " ^
13859
adf68d9e5dec split_name no longer uses Sign.string_of_typ to encode types, since
berghofe
parents: 13855
diff changeset
   431
  (if asm then "asm " else "") ^ name ^ " :: " ^ string_of_typ T;
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   432
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   433
fun ss addsplits splits =
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   434
  let
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   435
    fun addsplit split ss =
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   436
      let
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   437
        val (name, asm) = split_thm_info split
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   438
        val tac = (if asm then split_asm_tac else split_tac) [split]
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   439
      in Simplifier.addloop (ss, (split_name name asm, tac)) end
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   440
  in fold addsplit splits ss end;
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   441
5304
c133f16febc7 the splitter is now defined as a functor
oheimb
parents: 4930
diff changeset
   442
fun ss delsplits splits =
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   443
  let
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   444
    fun delsplit split ss =
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   445
      let val (name, asm) = split_thm_info split
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   446
      in Simplifier.delloop (ss, split_name name asm) end
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   447
  in fold delsplit splits ss end;
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   448
8468
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   449
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   450
(* attributes *)
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   451
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   452
val splitN = "split";
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   453
18688
abf0f018b5ec generic attributes;
wenzelm
parents: 18545
diff changeset
   454
val split_add = Simplifier.attrib (op addsplits);
abf0f018b5ec generic attributes;
wenzelm
parents: 18545
diff changeset
   455
val split_del = Simplifier.attrib (op delsplits);
8634
3f34637cb9c0 use Attrib.add_del_args;
wenzelm
parents: 8476
diff changeset
   456
3f34637cb9c0 use Attrib.add_del_args;
wenzelm
parents: 8476
diff changeset
   457
9703
bf65780eed02 added 'split' method;
wenzelm
parents: 9267
diff changeset
   458
(* methods *)
8468
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   459
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   460
val split_modifiers =
18728
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   461
 [Args.$$$ splitN -- Args.colon >> K ((I, split_add): Method.modifier),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   462
  Args.$$$ splitN -- Args.add -- Args.colon >> K (I, split_add),
6790126ab5f6 simplified type attribute;
wenzelm
parents: 18708
diff changeset
   463
  Args.$$$ splitN -- Args.del -- Args.colon >> K (I, split_del)];
8468
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   464
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   465
18688
abf0f018b5ec generic attributes;
wenzelm
parents: 18545
diff changeset
   466
(* theory setup *)
8468
d99902232df8 added attributes, method modifiers, theory setup;
wenzelm
parents: 7672
diff changeset
   467
9703
bf65780eed02 added 'split' method;
wenzelm
parents: 9267
diff changeset
   468
val setup =
33242
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   469
  Attrib.setup @{binding split}
99577c7085c8 misc tuning and simplification;
wenzelm
parents: 33029
diff changeset
   470
    (Attrib.add_del split_add split_del) "declare case split rule" #>
30722
623d4831c8cf simplified attribute and method setup: eliminating bottom-up styles makes it easier to keep things in one place, and also SML/NJ happy;
wenzelm
parents: 30609
diff changeset
   471
  Method.setup @{binding split}
623d4831c8cf simplified attribute and method setup: eliminating bottom-up styles makes it easier to keep things in one place, and also SML/NJ happy;
wenzelm
parents: 30609
diff changeset
   472
    (Attrib.thms >> (fn ths => K (SIMPLE_METHOD' (CHANGED_PROP o gen_split_tac ths))))
623d4831c8cf simplified attribute and method setup: eliminating bottom-up styles makes it easier to keep things in one place, and also SML/NJ happy;
wenzelm
parents: 30609
diff changeset
   473
    "apply case split rule";
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   474
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   475
end;