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added class invariant check_exercise_inv_1

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Burkhart Wolff 2019-11-19 11:11:56 +01:00
parent c0812396de
commit ca20a55cfb
1 changed files with 25 additions and 0 deletions
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25
src/ontologies/math_exam/Nmath_exam.thy
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@ -132,6 +132,31 @@ doc_class exercise = exam_item +
accepts "\<lbrace>task ~~ answer\<rbrace>\<^sup>+ ~~ \<lbrace>solution\<rbrace>\<^sup>+"
ML\<open>fun check_exercise_inv_1 oid {is_monitor} ctxt =
let fun get_attr oid attr = AttributeAccess.compute_attr_access ctxt attr oid @{here} @{here}
(* val term = AttributeAccess.compute_attr_access ctxt "trace" oid @{here} @{here} *)
fun conv (Const(@{const_name "Pair"},_) $ Const(s,_) $ S) = (s, HOLogic.dest_string S)
val string_pair_list = map conv (HOLogic.dest_list (get_attr oid "trace" ))
val cid_list = map fst string_pair_list
val ctxt' = Proof_Context.init_global(Context.theory_of ctxt)
fun is_task x = DOF_core.is_subclass ctxt' x "Nmath_exam.task"
fun is_answer x = DOF_core.is_subclass ctxt' x "Nmath_exam.answer"
val task_answer_part = (filter (fn x => is_task x orelse is_answer x) cid_list)
val _ = case get_attr (hd task_answer_part) "cat" of
@{term "main"} => ()
| _ => error("class exercise invariant violation: must start with main category. ")
fun check_match [] = ()
|check_match (task_id::answer_id::S) =
(if get_attr task_id "cat" = get_attr answer_id "cat"
then check_match S
else error("class exercise invariant violation: \
\ task and answer category does not match. "))
val _ = check_match task_answer_part
in true end
\<close>
setup\<open>DOF_core.update_class_invariant "Nmath_exam.exercise" check_exercise_inv_1\<close>
doc_class context_description = exam_item +
label :: string