src/HOL/Codatatype/Tools/bnf_fp_sugar.ML
author blanchet
Wed, 05 Sep 2012 16:00:53 +0200
changeset 49165 c6ccaf6df93c
parent 49161 a8e74375d971
child 49167 68623861e0f2
permissions -rw-r--r--
check type variables on rhs
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     1
(*  Title:      HOL/Codatatype/Tools/bnf_fp_sugar.ML
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     2
    Author:     Jasmin Blanchette, TU Muenchen
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     3
    Copyright   2012
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     4
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     5
Sugar for constructing LFPs and GFPs.
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     6
*)
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     7
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     8
signature BNF_FP_SUGAR =
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
     9
sig
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
    10
end;
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
    11
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
    12
structure BNF_FP_Sugar : BNF_FP_SUGAR =
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
    13
struct
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
    14
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    15
open BNF_Util
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    16
open BNF_Wrap
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    17
open BNF_FP_Util
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    18
open BNF_LFP
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    19
open BNF_GFP
49123
263b0e330d8b more work on sugar + simplify Trueprop + eq idiom everywhere
blanchet
parents: 49121
diff changeset
    20
open BNF_FP_Sugar_Tactics
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    21
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    22
val caseN = "case";
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    23
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
    24
fun cannot_merge_types () = error "Mutually recursive types must have the same type parameters";
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    25
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    26
fun merge_type_arg_constrained ctxt (T, c) (T', c') =
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    27
  if T = T' then
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    28
    (case (c, c') of
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    29
      (_, NONE) => (T, c)
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    30
    | (NONE, _) => (T, c')
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    31
    | _ =>
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    32
      if c = c' then
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    33
        (T, c)
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    34
      else
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    35
        error ("Inconsistent sort constraints for type variable " ^
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    36
          quote (Syntax.string_of_typ ctxt T)))
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    37
  else
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    38
    cannot_merge_types ();
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    39
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    40
fun merge_type_args_constrained ctxt (cAs, cAs') =
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    41
  if length cAs = length cAs' then map2 (merge_type_arg_constrained ctxt) cAs cAs'
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    42
  else cannot_merge_types ();
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    43
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    44
fun type_args_constrained_of (((cAs, _), _), _) = cAs;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    45
val type_args_of = map fst o type_args_constrained_of;
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    46
fun type_binder_of (((_, b), _), _) = b;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    47
fun mixfix_of_typ ((_, mx), _) = mx;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    48
fun ctr_specs_of (_, ctr_specs) = ctr_specs;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    49
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    50
fun disc_of (((disc, _), _), _) = disc;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    51
fun ctr_of (((_, ctr), _), _) = ctr;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    52
fun args_of ((_, args), _) = args;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    53
fun mixfix_of_ctr (_, mx) = mx;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    54
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
    55
val uncurry_fs =
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
    56
  map2 (fn f => fn xs => HOLogic.tupled_lambda (HOLogic.mk_tuple xs) (Term.list_comb (f, xs)));
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    57
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
    58
fun prepare_data prepare_typ gfp specs fake_lthy lthy =
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
    59
  let
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    60
    val constrained_As =
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    61
      map (map (apfst (prepare_typ fake_lthy)) o type_args_constrained_of) specs
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    62
      |> Library.foldr1 (merge_type_args_constrained lthy);
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    63
    val As = map fst constrained_As;
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
    64
    val As' = map dest_TFree As;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    65
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    66
    val _ = (case duplicates (op =) As of [] => ()
49165
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
    67
      | A :: _ => error ("Duplicate type parameter " ^ quote (Syntax.string_of_typ lthy A)));
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    68
49157
6407346b74c7 ported "Misc_Data" to new syntax
blanchet
parents: 49146
diff changeset
    69
    (* TODO: print timing information for sugar *)
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    70
    (* TODO: use sort constraints on type args *)
49157
6407346b74c7 ported "Misc_Data" to new syntax
blanchet
parents: 49146
diff changeset
    71
    (* TODO: use mixfix *)
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    72
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    73
    val N = length specs;
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    74
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    75
    fun mk_T b =
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    76
      Type (fst (Term.dest_Type (Proof_Context.read_type_name fake_lthy true (Binding.name_of b))),
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    77
        As);
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    78
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    79
    val bs = map type_binder_of specs;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    80
    val Ts = map mk_T bs;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    81
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    82
    val mixfixes = map mixfix_of_typ specs;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    83
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    84
    val _ = (case duplicates Binding.eq_name bs of [] => ()
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    85
      | b :: _ => error ("Duplicate type name declaration " ^ quote (Binding.name_of b)));
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    86
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    87
    val ctr_specss = map ctr_specs_of specs;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    88
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    89
    val disc_binderss = map (map disc_of) ctr_specss;
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    90
    val ctr_binderss = map (map ctr_of) ctr_specss;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    91
    val ctr_argsss = map (map args_of) ctr_specss;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    92
    val ctr_mixfixess = map (map mixfix_of_ctr) ctr_specss;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
    93
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
    94
    val sel_bindersss = map (map (map fst)) ctr_argsss;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    95
    val ctr_Tsss = map (map (map (prepare_typ fake_lthy o snd))) ctr_argsss;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
    96
49165
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
    97
    val rhs_As = (case subtract (op =) As' (fold (fold (fold Term.add_tfreesT)) ctr_Tsss []) of
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
    98
        [] => ()
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
    99
      | A' :: _ => error ("Extra type variables on rhs: " ^
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
   100
          quote (Syntax.string_of_typ lthy (TFree A'))));
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
   101
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
   102
    (* TODO: check that no type variables occur in the rhss that's not in the lhss *)
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
   103
c6ccaf6df93c check type variables on rhs
blanchet
parents: 49161
diff changeset
   104
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   105
    val (Bs, C) =
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   106
      lthy
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   107
      |> fold (fold (fn s => Variable.declare_typ (TFree (s, dummyS))) o type_args_of) specs
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   108
      |> mk_TFrees N
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   109
      ||> the_single o fst o mk_TFrees 1;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   110
49146
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   111
    fun is_same_rec (T as Type (s, Us)) (Type (s', Us')) =
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   112
        s = s' andalso (Us = Us' orelse error ("Illegal occurrence of recursive type " ^
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   113
          quote (Syntax.string_of_typ fake_lthy T)))
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   114
      | is_same_rec _ _ = false
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   115
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   116
    fun freeze_rec (T as Type (s, Us)) =
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   117
        (case find_index (is_same_rec T) Ts of
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   118
          ~1 => Type (s, map freeze_rec Us)
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   119
        | i => nth Bs i)
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   120
      | freeze_rec T = T;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   122
    val ctr_TsssBs = map (map (map freeze_rec)) ctr_Tsss;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   123
    val sum_prod_TsBs = map (mk_sumTN o map HOLogic.mk_tupleT) ctr_TsssBs;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   124
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   125
    val eqs = map dest_TFree Bs ~~ sum_prod_TsBs;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   126
49126
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   127
    val ((raw_unfs, raw_flds, unf_flds, fld_unfs, fld_injects), lthy') =
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   128
      fp_bnf (if gfp then bnf_gfp else bnf_lfp) bs As' eqs lthy;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   129
49126
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   130
    fun mk_unf_or_fld get_foldedT Ts t =
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   131
      let val Type (_, Ts0) = get_foldedT (fastype_of t) in
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   132
        Term.subst_atomic_types (Ts0 ~~ Ts) t
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   133
      end;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   134
49126
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   135
    val mk_unf = mk_unf_or_fld domain_type;
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   136
    val mk_fld = mk_unf_or_fld range_type;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   137
49126
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   138
    val unfs = map (mk_unf As) raw_unfs;
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   139
    val flds = map (mk_fld As) raw_flds;
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   140
49135
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   141
    fun pour_sugar_on_type ((((((((((b, T), fld), unf), fld_unf), unf_fld), fld_inject),
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   142
        ctr_binders), ctr_Tss), disc_binders), sel_binderss) no_defs_lthy =
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   143
      let
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   144
        val n = length ctr_binders;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   145
        val ks = 1 upto n;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   146
        val ms = map length ctr_Tss;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   147
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   148
        val unf_T = domain_type (fastype_of fld);
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   149
        val prod_Ts = map HOLogic.mk_tupleT ctr_Tss;
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   150
        val case_Ts = map (fn Ts => Ts ---> C) ctr_Tss;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   151
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   152
        val ((((fs, u), v), xss), _) =
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   153
          lthy
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   154
          |> mk_Frees "f" case_Ts
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   155
          ||>> yield_singleton (mk_Frees "u") unf_T
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   156
          ||>> yield_singleton (mk_Frees "v") T
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   157
          ||>> mk_Freess "x" ctr_Tss;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   158
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   159
        val ctr_rhss =
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   160
          map2 (fn k => fn xs =>
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   161
            fold_rev Term.lambda xs (fld $ mk_InN prod_Ts (HOLogic.mk_tuple xs) k)) ks xss;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   162
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   163
        val case_binder = Binding.suffix_name ("_" ^ caseN) b;
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   164
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   165
        val case_rhs =
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   166
          fold_rev Term.lambda (fs @ [v]) (mk_sum_caseN (uncurry_fs fs xss) $ (unf $ v));
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   167
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   168
        val (((raw_ctrs, raw_ctr_defs), (raw_case, raw_case_def)), (lthy', lthy)) = no_defs_lthy
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   169
          |> apfst split_list o fold_map2 (fn b => fn rhs =>
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   170
               Local_Theory.define ((b, NoSyn), ((Thm.def_binding b, []), rhs)) #>> apsnd snd)
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   171
             ctr_binders ctr_rhss
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   172
          ||>> (Local_Theory.define ((case_binder, NoSyn), ((Thm.def_binding case_binder, []),
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   173
             case_rhs)) #>> apsnd snd)
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   174
          ||> `Local_Theory.restore;
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   175
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   176
        (*transforms defined frees into consts (and more)*)
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   177
        val phi = Proof_Context.export_morphism lthy lthy';
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   178
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   179
        val ctr_defs = map (Morphism.thm phi) raw_ctr_defs;
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   180
        val case_def = Morphism.thm phi raw_case_def;
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   181
49123
263b0e330d8b more work on sugar + simplify Trueprop + eq idiom everywhere
blanchet
parents: 49121
diff changeset
   182
        val ctrs = map (Morphism.term phi) raw_ctrs;
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   183
        val casex = Morphism.term phi raw_case;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   184
49135
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   185
        fun exhaust_tac {context = ctxt, ...} =
49123
263b0e330d8b more work on sugar + simplify Trueprop + eq idiom everywhere
blanchet
parents: 49121
diff changeset
   186
          let
49135
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   187
            val fld_iff_unf_thm =
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   188
              let
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   189
                val goal =
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   190
                  fold_rev Logic.all [u, v]
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   191
                    (mk_Trueprop_eq (HOLogic.mk_eq (v, fld $ u), HOLogic.mk_eq (unf $ v, u)));
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   192
              in
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   193
                Skip_Proof.prove lthy [] [] goal (fn {context = ctxt, ...} =>
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   194
                  mk_fld_iff_unf_tac ctxt (map (SOME o certifyT lthy) [unf_T, T]) (certify lthy fld)
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   195
                    (certify lthy unf) fld_unf unf_fld)
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   196
                |> Thm.close_derivation
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   197
                |> Morphism.thm phi
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   198
              end;
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   199
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   200
            val sumEN_thm' =
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   201
              Local_Defs.unfold lthy @{thms all_unit_eq}
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   202
                (Drule.instantiate' (map (SOME o certifyT lthy) prod_Ts) [] (mk_sumEN n))
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   203
              |> Morphism.thm phi;
49123
263b0e330d8b more work on sugar + simplify Trueprop + eq idiom everywhere
blanchet
parents: 49121
diff changeset
   204
          in
49161
a8e74375d971 fixed (n + 1)st bug in "mk_exhaust_tac" -- arose with uncurried constructors
blanchet
parents: 49157
diff changeset
   205
            mk_exhaust_tac ctxt n ctr_defs fld_iff_unf_thm sumEN_thm'
49123
263b0e330d8b more work on sugar + simplify Trueprop + eq idiom everywhere
blanchet
parents: 49121
diff changeset
   206
          end;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   207
49126
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   208
        val inject_tacss =
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   209
          map2 (fn 0 => K []
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   210
                 | _ => fn ctr_def => [fn {context = ctxt, ...} =>
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   211
                     mk_inject_tac ctxt ctr_def fld_inject])
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   212
            ms ctr_defs;
1bbd7a37fc29 implemented "mk_inject_tac"
blanchet
parents: 49125
diff changeset
   213
49127
f7326a0d7f19 implemented "mk_half_distinct_tac"
blanchet
parents: 49126
diff changeset
   214
        val half_distinct_tacss =
f7326a0d7f19 implemented "mk_half_distinct_tac"
blanchet
parents: 49126
diff changeset
   215
          map (map (fn (def, def') => fn {context = ctxt, ...} =>
f7326a0d7f19 implemented "mk_half_distinct_tac"
blanchet
parents: 49126
diff changeset
   216
            mk_half_distinct_tac ctxt fld_inject [def, def'])) (mk_half_pairss ctr_defs);
f7326a0d7f19 implemented "mk_half_distinct_tac"
blanchet
parents: 49126
diff changeset
   217
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   218
        val case_tacs =
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   219
          map3 (fn k => fn m => fn ctr_def => fn {context = ctxt, ...} =>
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   220
            mk_case_tac ctxt n k m case_def ctr_def unf_fld) ks ms ctr_defs;
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   221
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   222
        val tacss = [exhaust_tac] :: inject_tacss @ half_distinct_tacss @ [case_tacs];
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   223
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   224
        fun sugar_lfp lthy =
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   225
          let
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   226
(*###
49146
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   227
            val fld_iter = @{term True}; (*###*)
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   228
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   229
            val iter_Tss = map (fn Ts => Ts) (*###*) ctr_Tss;
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   230
            val iter_Ts = map (fn Ts => Ts ---> C) iter_Tss;
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   231
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   232
            val iter_fs = map2 (fn Free (s, _) => fn T => Free (s, T)) fs iter_Ts
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   233
49146
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   234
            val iter_rhs =
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   235
              fold_rev Term.lambda fs (fld_iter $ mk_sum_caseN (uncurry_fs fs xss) $ (unf $ v));
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   236
e32b1f748854 added a check
blanchet
parents: 49135
diff changeset
   237
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   238
            val uncurried_fs =
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   239
              map2 (fn f => fn xs =>
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   240
                HOLogic.tupled_lambda (HOLogic.mk_tuple xs) (Term.list_comb (f, xs))) fs xss;
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   241
*)
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   242
          in
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   243
            lthy
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   244
          end;
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   245
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   246
        fun sugar_gfp lthy = lthy;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   247
      in
49130
3c26e17b2849 implemented "mk_case_tac" -- and got rid of "cheat_tac"
blanchet
parents: 49129
diff changeset
   248
        wrap_data tacss ((ctrs, casex), (disc_binders, sel_binderss)) lthy'
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   249
        |> (if gfp then sugar_gfp else sugar_lfp)
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   250
      end;
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   251
  in
49124
968e1b7de057 more work on FP sugar
blanchet
parents: 49123
diff changeset
   252
    lthy'
49135
de13b454fa31 fixed some type issues in sugar "exhaust_tac"
blanchet
parents: 49134
diff changeset
   253
    |> fold pour_sugar_on_type (bs ~~ Ts ~~ flds ~~ unfs ~~ fld_unfs ~~ unf_flds ~~ fld_injects ~~
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   254
      ctr_binderss ~~ ctr_Tsss ~~ disc_binderss ~~ sel_bindersss)
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   255
  end;
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   256
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   257
fun data_cmd info specs lthy =
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   258
  let
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   259
    val fake_lthy =
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   260
      Proof_Context.theory_of lthy
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   261
      |> Theory.copy
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   262
      |> Sign.add_types_global (map (fn spec =>
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   263
        (type_binder_of spec, length (type_args_constrained_of spec), mixfix_of_typ spec)) specs)
49121
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   264
      |> Proof_Context.init_global
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   265
  in
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   266
    prepare_data Syntax.read_typ info specs fake_lthy lthy
9e0acaa470ab more work on FP sugar
blanchet
parents: 49119
diff changeset
   267
  end;
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   268
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   269
val parse_opt_binding_colon = Scan.optional (Parse.binding --| Parse.$$$ ":") no_binder
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   270
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   271
val parse_ctr_arg =
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   272
  Parse.$$$ "(" |-- parse_opt_binding_colon -- Parse.typ --| Parse.$$$ ")" ||
49129
b5413cb7d860 define "case" constant
blanchet
parents: 49127
diff changeset
   273
  (Parse.typ >> pair no_binder);
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   274
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   275
val parse_single_spec =
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   276
  Parse.type_args_constrained -- Parse.binding -- Parse.opt_mixfix --
49119
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   277
  (@{keyword "="} |-- Parse.enum1 "|" (parse_opt_binding_colon -- Parse.binding --
1f605c36869c more work on FP sugar
blanchet
parents: 49112
diff changeset
   278
    Scan.repeat parse_ctr_arg -- Parse.opt_mixfix));
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   279
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   280
val _ =
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   281
  Outer_Syntax.local_theory @{command_spec "data"} "define BNF-based inductive datatypes"
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   282
    (Parse.and_list1 parse_single_spec >> data_cmd false);
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   283
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   284
val _ =
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   285
  Outer_Syntax.local_theory @{command_spec "codata"} "define BNF-based coinductive datatypes"
49134
846264f80f16 optionally provide extra dead variables to the FP constructions
blanchet
parents: 49130
diff changeset
   286
    (Parse.and_list1 parse_single_spec >> data_cmd true);
49112
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   287
4de4635d8f93 started work on sugared "(co)data" commands
blanchet
parents:
diff changeset
   288
end;