theory Thy_3 imports Thy_2 Thy_2b begin

ML \<open>val test_list_rls =

  Rule_Set.append_rules "test_list_rls" Rule_Set.empty [\<^rule_thm>\<open>not_def\<close>]\<close>

setup \<open>Test_KEStore_Elems.add_rlss (*already added in Thy_1.thy and Thy_2.thy*)

  [("test_list_rls", (Context.theory_name @{theory}, test_list_rls))]\<close>

ML \<open>

  if length (Test_KEStore_Elems.get_rlss @{theory}) = 1 (*stored in 3 different theories*)

  then () else error "rls identified by string-identifier, not by theory: changed"

(*test_ruleset' := overwritelthy @{theory} (! test_ruleset', [("test_list_rls", 

    Rule_Set.append_rules "test_list_rls" test_list_rls [Eval ("test_function", e_evalfn)])])*)

  ;

(*if length (Test_KEStore_Elems.get_rlss @{theory}) = length (! test_ruleset')

  then () else error "Test_KEStore_Elems.get_rlss = test_ruleset': changed"*)

  ;

  val SOME (_, Rule_Set.Repeat {rules, ...}) =

    AList.lookup op= (Test_KEStore_Elems.get_rlss @{theory}) "test_list_rls"

  ;

  case rules of

    [Rule.Thm ("not_def", _)] => ()

  | _ => error "union rls_eq changed: 1st argument is NOT overwritten anymore"

  (* merge rules of rls with the same Rule_Set.id must be done one level higher:

    Test_KEStore_Elems.add_rlss does *add* or *overwrite* *)

\<close>

end