src/HOL/Library/ROOT.ML

generalize setsum_cases

(* Classical Higher-order Logic -- batteries included *)

use_thys ["Library", "List_Prefix", "List_lexord", "Sublist_Order",
  "Code_Char_chr", "Code_Char_ord", "Code_Integer", "Efficient_Nat", "Executable_Set"(*, "Code_Prolog"*)];