src/Provers/splitter.ML
author wenzelm
Wed, 07 Jan 1998 13:55:29 +0100
changeset 4519 055f2067d373
parent 4453 bcb28bb925c1
child 4668 131989b78417
permissions -rw-r--r--
adapted to new sort function;
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     1
(*  Title:      Provers/splitter
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     2
    ID:         $Id$
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     3
    Author:     Tobias Nipkow
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
     4
    Copyright   1995  TU Munich
4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     5
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     6
Generic case-splitter, suitable for most logics.
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
     7
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     8
Use:
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
     9
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    10
val split_tac = mk_case_split_tac iffD;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    11
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
    12
by(split_tac splits i);
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    13
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    14
where splits = [P(elim(...)) == rhs, ...]
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    15
      iffD  = [| P <-> Q; Q |] ==> P (* is called iffD2 in HOL *)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    16
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    17
*)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    18
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
    19
local
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
    20
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
    21
fun mk_case_split_tac_2 iffD order =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    22
let
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    23
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    24
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    25
(************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    26
   Create lift-theorem "trlift" :
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    27
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    28
   [| !! x. Q(x)==R(x) ; P(R) == C |] ==> P(Q)==C
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    29
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    30
*************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    31
 
943
8477483f663f Replaced read by read_cterm.
nipkow
parents: 927
diff changeset
    32
val lift =
8477483f663f Replaced read by read_cterm.
nipkow
parents: 927
diff changeset
    33
  let val ct = read_cterm (#sign(rep_thm iffD))
8477483f663f Replaced read by read_cterm.
nipkow
parents: 927
diff changeset
    34
           ("[| !!x::'b::logic. Q(x) == R(x) |] ==> \
3835
9a5a4e123859 fixed dots;
wenzelm
parents: 3537
diff changeset
    35
            \P(%x. Q(x)) == P(%x. R(x))::'a::logic",propT)
943
8477483f663f Replaced read by read_cterm.
nipkow
parents: 927
diff changeset
    36
  in prove_goalw_cterm [] ct
8477483f663f Replaced read by read_cterm.
nipkow
parents: 927
diff changeset
    37
     (fn [prem] => [rewtac prem, rtac reflexive_thm 1])
8477483f663f Replaced read by read_cterm.
nipkow
parents: 927
diff changeset
    38
  end;
4
2695ba9b40f7 added header
nipkow
parents: 0
diff changeset
    39
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    40
val trlift = lift RS transitive_thm;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    41
val _ $ (Var(P,PT)$_) $ _ = concl_of trlift;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    42
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    43
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    44
(************************************************************************ 
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    45
   Set up term for instantiation of P in the lift-theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    46
   
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    47
   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
    48
   t     : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    49
           the lift theorem is applied to (see select)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    50
   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
    51
   T     : type of body of P(...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    52
   maxi  : maximum index of Vars
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    53
*************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    54
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
    55
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
    56
  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
    57
      fun down [] t i = Bound 0
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
    58
        | down (p::ps) t i =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
    59
            let val (h,ts) = strip_comb t
2266
82aef6857c5b Replaced map...~~ by ListPair.map
paulson
parents: 2143
diff changeset
    60
                val v1 = ListPair.map var (take(p,ts), i upto (i+p-1))
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
    61
                val u::us = drop(p,ts)
2266
82aef6857c5b Replaced map...~~ by ListPair.map
paulson
parents: 2143
diff changeset
    62
                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
    63
      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
    64
  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
    65
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    66
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    67
(************************************************************************ 
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    68
   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
    69
   P(...) == rhs
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    70
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    71
   t     : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    72
           the split theorem is applied to (see select)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    73
   T     : type of body of P(...)
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    74
   tt    : the term  Const(key,..) $ ...
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    75
*************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    76
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    77
fun mk_cntxt_splitthm t tt T =
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    78
  let fun repl lev t =
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    79
    if incr_boundvars lev tt = t then Bound lev
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    80
    else case t of
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    81
        (Abs (v, T2, t)) => Abs (v, T2, repl (lev+1) t)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    82
      | (Bound i) => Bound (if i>=lev then i+1 else i)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    83
      | (t1 $ t2) => (repl lev t1) $ (repl lev t2)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    84
      | t => t
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
    85
  in Abs("", T, repl 0 t) end;
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    86
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    87
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    88
(* add all loose bound variables in t to list is *)
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
    89
fun add_lbnos(is,t) = add_loose_bnos(t,0,is);
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
    90
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
    91
(* check if the innermost quantifier that needs to be removed
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
    92
   has a body of type T; otherwise the expansion thm will fail later on
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
    93
*)
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
    94
fun type_test(T,lbnos,apsns) =
2143
093bbe6d333b Replaced min by Int.min
paulson
parents: 1721
diff changeset
    95
  let val (_,U,_) = nth_elem(foldl Int.min (hd lbnos, tl lbnos), apsns)
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
    96
  in T=U end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
    97
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    98
(*************************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
    99
   Create a "split_pack".
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   100
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   101
   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
   102
           is of the form
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   103
           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
   104
   T     : type of P(...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   105
   n     : number of arguments expected by Const(key,...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   106
   ts    : list of arguments actually found
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   107
   apsns : list of tuples of the form (T,U,pos), one tuple for each
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   108
           abstraction that is encountered on the way to the position where 
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   109
           Const(key, ...) $ ...  occurs, where
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   110
           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
   111
           U   : type of the abstraction's body
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   112
           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
   113
   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
   114
   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
   115
   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
   116
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   117
   A split pack is a tuple of the form
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   118
   (thm, apsns, pos, TB)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   119
   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
   120
          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
   121
          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
   122
          lifting is required before applying the split-theorem.
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   123
******************************************************************************) 
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   124
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   125
fun mk_split_pack(thm,T,n,ts,apsns,pos,TB,t) =
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   126
  if n > length ts then []
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   127
  else let val lev = length apsns
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   128
           val lbnos = foldl add_lbnos ([],take(n,ts))
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   129
           val flbnos = filter (fn i => i < lev) lbnos
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   130
           val tt = incr_boundvars (~lev) t
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   131
       in if null flbnos then [(thm,[],pos,TB,tt)]
2143
093bbe6d333b Replaced min by Int.min
paulson
parents: 1721
diff changeset
   132
          else if type_test(T,flbnos,apsns) then [(thm, rev apsns,pos,TB,tt)] 
093bbe6d333b Replaced min by Int.min
paulson
parents: 1721
diff changeset
   133
               else []
1064
5d6fb2c938e0 Fixed bug.
nipkow
parents: 1030
diff changeset
   134
       end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   135
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   136
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   137
(****************************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   138
   Recursively scans term for occurences of Const(key,...) $ ...
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   139
   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
   140
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   141
   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
   142
          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
   143
          key : the theorem's key constant ( Const(key,...) $ ... )
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   144
          thm : the theorem itself
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   145
          T   : type of P( Const(key,...) $ ... )
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   146
          n   : number of arguments expected by Const(key,...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   147
   Ts   : types of parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   148
   t    : the term to be scanned
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   149
******************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   150
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   151
fun split_posns cmap Ts t =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   152
  let fun posns Ts pos apsns (Abs(_,T,t)) =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   153
            let val U = fastype_of1(T::Ts,t)
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   154
            in posns (T::Ts) (0::pos) ((T,U,pos)::apsns) t end
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   155
        | posns Ts pos apsns t =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   156
            let val (h,ts) = strip_comb t
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   157
                fun iter((i,a),t) = (i+1, (posns Ts (i::pos) apsns t) @ a);
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   158
                val a = case h of
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   159
                  Const(c,_) =>
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   160
                    (case assoc(cmap,c) of
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   161
                       Some(thm, T, n) =>
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   162
                         let val t2 = list_comb (h, take (n, ts)) in
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   163
                           mk_split_pack(thm,T,n,ts,apsns,pos,type_of1(Ts, t2),t2)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   164
                         end
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   165
                     | None => [])
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   166
                | _ => []
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   167
             in snd(foldl iter ((0,a),ts)) end
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   168
  in posns Ts [] [] t end;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   169
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   170
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   171
fun nth_subgoal i thm = nth_elem(i-1,prems_of thm);
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   172
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   173
fun shorter((_,ps,pos,_,_),(_,qs,qos,_,_)) =
4519
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   174
  prod_ord (int_ord o pairself length) (order o pairself length)
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   175
    ((ps, pos), (qs, qos));
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   176
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   177
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   178
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   179
(************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   180
   call split_posns with appropriate parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   181
*************************************************************)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   182
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   183
fun select cmap state i =
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   184
  let val goali = nth_subgoal i state
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   185
      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
   186
      val _ $ t $ _ = Logic.strip_assums_concl goali;
4519
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   187
  in (Ts,t, sort shorter (split_posns cmap Ts t)) end;
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   188
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   189
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   190
(*************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   191
   instantiate lift theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   192
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   193
   if t is of the form
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   194
   ... ( Const(...,...) $ Abs( .... ) ) ...
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   195
   then
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   196
   P = %a.  ... ( Const(...,...) $ a ) ...
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   197
   where a has type T --> U
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   198
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   199
   Ts      : types of parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   200
   t       : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   201
             the split theorem is applied to (see cmap)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   202
   T,U,pos : see mk_split_pack
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   203
   state   : current proof state
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   204
   lift    : the lift theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   205
   i       : no. of subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   206
**************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   207
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   208
fun inst_lift Ts t (T,U,pos) state lift i =
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   209
  let val sg = #sign(rep_thm state)
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   210
      val tsig = #tsig(Sign.rep_sg sg)
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   211
      val cntxt = mk_cntxt Ts t pos (T-->U) (#maxidx(rep_thm lift))
231
cb6a24451544 Updated refs to old Sign functions
lcp
parents: 4
diff changeset
   212
      val cu = cterm_of sg cntxt
cb6a24451544 Updated refs to old Sign functions
lcp
parents: 4
diff changeset
   213
      val uT = #T(rep_cterm cu)
cb6a24451544 Updated refs to old Sign functions
lcp
parents: 4
diff changeset
   214
      val cP' = cterm_of sg (Var(P,uT))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   215
      val ixnTs = Type.typ_match tsig ([],(PT,uT));
231
cb6a24451544 Updated refs to old Sign functions
lcp
parents: 4
diff changeset
   216
      val ixncTs = map (fn (x,y) => (x,ctyp_of sg y)) ixnTs;
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   217
  in instantiate (ixncTs, [(cP',cu)]) lift end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   218
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   219
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   220
(*************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   221
   instantiate split theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   222
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   223
   Ts    : types of parameters
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   224
   t     : lefthand side of meta-equality in subgoal
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   225
           the split theorem is applied to (see cmap)
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   226
   tt    : the term  Const(key,..) $ ...
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   227
   thm   : the split theorem
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   228
   TB    : type of body of P(...)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   229
   state : current proof state
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   230
   i     : number of subgoal
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   231
**************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   232
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   233
fun inst_split Ts t tt thm TB state i =
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   234
  let val _ $ ((Var (P2, PT2)) $ _) $ _ = concl_of thm;
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   235
      val sg = #sign(rep_thm state)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   236
      val tsig = #tsig(Sign.rep_sg sg)
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   237
      val cntxt = mk_cntxt_splitthm t tt TB;
4236
fc85fd718429 Fixed bug in inst_split.
berghofe
parents: 4232
diff changeset
   238
      val T = fastype_of1 (Ts, cntxt);
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   239
      val ixnTs = Type.typ_match tsig ([],(PT2, T))
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   240
      val abss = foldl (fn (t, T) => Abs ("", T, t))
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   241
  in
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   242
    term_lift_inst_rule (state, i, ixnTs, [((P2, T), abss (cntxt, Ts))], thm)
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   243
  end;
1686
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   244
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   245
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   246
(*****************************************************************************
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   247
   The split-tactic
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   248
   
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   249
   splits : list of split-theorems to be tried
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   250
   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
   251
*****************************************************************************)
c67d543bc395 Added functions mk_cntxt_splitthm and inst_split which instantiate
berghofe
parents: 1064
diff changeset
   252
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   253
fun split_tac [] i = no_tac
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   254
  | split_tac splits i =
3918
94e0fdcb7b91 Added error messages.
nipkow
parents: 3835
diff changeset
   255
  let fun const(thm) =
94e0fdcb7b91 Added error messages.
nipkow
parents: 3835
diff changeset
   256
            (case concl_of thm of _$(t as _$lhs)$_ =>
94e0fdcb7b91 Added error messages.
nipkow
parents: 3835
diff changeset
   257
               (case strip_comb lhs of (Const(a,_),args) =>
94e0fdcb7b91 Added error messages.
nipkow
parents: 3835
diff changeset
   258
                  (a,(thm,fastype_of t,length args))
94e0fdcb7b91 Added error messages.
nipkow
parents: 3835
diff changeset
   259
                | _ => error("Wrong format for split rule"))
94e0fdcb7b91 Added error messages.
nipkow
parents: 3835
diff changeset
   260
             | _ => error("Wrong format for split rule"))
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   261
      val cmap = map const splits;
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   262
      fun lift_tac Ts t p st = (rtac (inst_lift Ts t p st trlift i) i) st
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   263
      fun lift_split_tac st = st |>
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   264
            let val (Ts,t,splits) = select cmap st i
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   265
            in case splits of
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   266
                 [] => no_tac
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   267
               | (thm,apsns,pos,TB,tt)::_ =>
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   268
                   (case apsns of
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   269
                      [] => (fn state => state |>
4232
29f3875596ad Tuned function mk_cntxt_splitthm.
berghofe
parents: 4202
diff changeset
   270
			           compose_tac (false, inst_split Ts t tt thm TB state i, 0) i)
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   271
                    | p::_ => EVERY[lift_tac Ts t p,
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   272
                                    rtac reflexive_thm (i+1),
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   273
                                    lift_split_tac])
1030
1d8fa2fc4b9c Completely rewrote split_tac. The old one failed in strange circumstances.
nipkow
parents: 943
diff changeset
   274
            end
3537
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   275
  in COND (has_fewer_prems i) no_tac 
79ac9b475621 Removal of the tactical STATE
paulson
parents: 2266
diff changeset
   276
          (rtac iffD i THEN lift_split_tac)
0
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   277
  end;
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   278
a5a9c433f639 Initial revision
clasohm
parents:
diff changeset
   279
in split_tac end;
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   280
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   281
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   282
fun mk_case_split_asm_tac split_tac 
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   283
			  (disjE,conjE,exE,contrapos,contrapos2,notnotD) = 
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   284
let
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   285
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   286
(*****************************************************************************
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   287
   The split-tactic for premises
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   288
   
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   289
   splits : list of split-theorems to be tried
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   290
   i      : number of subgoal the tactic should be applied to
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   291
*****************************************************************************)
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   292
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   293
fun split_asm_tac []     = K no_tac
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   294
  | split_asm_tac splits = 
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   295
  let fun const thm =
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   296
            (case concl_of thm of Const ("Trueprop",_)$
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   297
				 (Const ("op =", _)$(Var _$t)$_) =>
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   298
               (case strip_comb t of (Const(a,_),_) => a
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   299
                | _ => error("Wrong format for split rule"))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   300
             | _ =>    error("Wrong format for split rule"))
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   301
      val cname_list = map const splits;
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   302
      fun is_case (a,_) = a mem cname_list;
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   303
      fun tac (t,i) = 
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   304
	  let val n = find_index (exists_Const is_case) 
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   305
				 (Logic.strip_assums_hyp t);
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   306
	      fun first_prem_is_disj (Const ("==>", _) $ (Const ("Trueprop", _)
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   307
				 $ (Const ("op |", _) $ _ $ _ )) $ _ ) = true
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   308
	      |   first_prem_is_disj (Const("all",_)$Abs(_,_,t)) = 
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   309
					first_prem_is_disj t
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   310
	      |   first_prem_is_disj _ = false;
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   311
	      fun flat_prems_tac i = SUBGOAL (fn (t,i) => 
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   312
				   (if first_prem_is_disj t
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   313
				    then EVERY[etac disjE i, rotate_tac ~1 i,
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   314
					       rotate_tac ~1  (i+1),
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   315
					       flat_prems_tac (i+1)]
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   316
				    else all_tac) 
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   317
				   THEN REPEAT (eresolve_tac [conjE,exE] i)
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   318
				   THEN REPEAT (dresolve_tac [notnotD]   i)) i;
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   319
	  in if n<0 then no_tac else DETERM (EVERY'
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   320
		[rotate_tac n, etac contrapos2,
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   321
		 split_tac splits, 
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   322
		 rotate_tac ~1, etac contrapos, rotate_tac ~1, 
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   323
		 flat_prems_tac] i)
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   324
	  end;
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   325
  in SUBGOAL tac
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   326
  end;
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   327
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   328
in split_asm_tac end;
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   329
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   330
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   331
in
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   332
4519
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   333
fun mk_case_split_tac iffD = mk_case_split_tac_2 iffD int_ord;
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   334
4519
055f2067d373 adapted to new sort function;
wenzelm
parents: 4453
diff changeset
   335
fun mk_case_split_inside_tac iffD = mk_case_split_tac_2 iffD (rev_order o int_ord);
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   336
4202
96876d71eef5 renamed split_prem_tac to split_asm_tac
oheimb
parents: 4189
diff changeset
   337
val mk_case_split_asm_tac = mk_case_split_asm_tac;
4189
b8c7a6bc6c16 added split_prem_tac
oheimb
parents: 3918
diff changeset
   338
1721
445654b6cb95 Rewrote mk_cntxt_splitthm. Added function mk_case_split_inside_tac.
berghofe
parents: 1686
diff changeset
   339
end;