src/HOL/Tools/BNF/bnf_util.ML

     'i list -> 'j -> 'k list * 'j
   val split_list4: ('a * 'b * 'c * 'd) list -> 'a list * 'b list * 'c list * 'd list
   val split_list5: ('a * 'b * 'c * 'd * 'e) list -> 'a list * 'b list * 'c list * 'd list * 'e list
   val split_list6: ('a * 'b * 'c * 'd * 'e * 'f) list -> 'a list * 'b list * 'c list * 'd list *
     'e list * 'f list
+  val split_list7: ('a * 'b * 'c * 'd * 'e * 'f * 'g) list -> 'a list * 'b list * 'c list * 'd list *
+    'e list * 'f list * 'g list
 
   val mk_TFreess: int list -> Proof.context -> typ list list * Proof.context
   val mk_Freesss: string -> typ list list list -> Proof.context ->
     term list list list * Proof.context
   val mk_Freessss: string -> typ list list list list -> Proof.context ->

 fun split_list6 [] = ([], [], [], [], [], [])
   | split_list6 ((x1, x2, x3, x4, x5, x6) :: xs) =
     let val (xs1, xs2, xs3, xs4, xs5, xs6) = split_list6 xs;
     in (x1 :: xs1, x2 :: xs2, x3 :: xs3, x4 :: xs4, x5 :: xs5, x6 :: xs6) end;
 
+fun split_list7 [] = ([], [], [], [], [], [], [])
+  | split_list7 ((x1, x2, x3, x4, x5, x6, x7) :: xs) =
+    let val (xs1, xs2, xs3, xs4, xs5, xs6, xs7) = split_list7 xs;
+    in (x1 :: xs1, x2 :: xs2, x3 :: xs3, x4 :: xs4, x5 :: xs5, x6 :: xs6, x7 :: xs7) end;
+
 val parse_type_arg_constrained =
   Parse.type_ident -- Scan.option (@{keyword "::"} |-- Parse.!!! Parse.sort);
 
 val parse_type_arg_named_constrained =
    (Parse.reserved "dead" >> K NONE || parse_opt_binding_colon >> SOME) --