theory KEStore 

 imports Complex_Main

 begin

   ML_file "~~/src/Tools/isac/library.sml"

   ML_file "~~/src/Tools/isac/calcelems.sml"

 section {* Knowledge elements for problems and methods *}

 ML {*

 (* Knowledge (and Exercises) are held by "KEStore" in Isac's Java front-end.

   In the front-end Knowledge comprises theories, problems and methods.

   Elements of problems and methods are defined in theories alongside

   the development of respective language elements. 

   However, the structure of methods and problems is independent from theories' 

   deductive structure. Thus respective structures are built in Build_Thydata.thy.

   Most elements of problems and methods are implemented in "Knowledge/", but some

   of them are implemented in "ProgLang/" already; thus "KEStore.thy" got this

   location in the directory structure.

 *)

 signature KESTORE_ELEMS =

 sig

   val get_rlss: theory -> (rls' * (theory' * rls)) list

   val add_rlss: (rls' * (theory' * rls)) list -> theory -> theory

   val get_calcs: theory -> (prog_calcID * (calID * eval_fn)) list

   val add_calcs: (prog_calcID * (calID * eval_fn)) list -> theory -> theory

   val get_cas: theory -> cas_elem list

   val add_cas: cas_elem list -> theory -> theory

   (*etc*)

 end;                               

 structure KEStore_Elems: KESTORE_ELEMS =

 struct

   fun union_overwrite eq l1 l2 = fold (insert eq) l2 (*..swapped..*) l1;

   structure Data = Theory_Data (

     type T = (rls' * (theory' * rls)) list;

     val empty = [];

     val extend = I;

     val merge = merge_rlss;

     );  

   fun get_rlss thy = Data.get thy

   fun add_rlss rlss = Data.map (union_overwrite rls_eq rlss)

   structure Data = Theory_Data (

     type T = (prog_calcID * (calID * eval_fn)) list;

     val empty = [];

     val extend = I;

     val merge = merge calc_eq;

     );                                                              

   fun get_calcs thy = Data.get thy

   fun add_calcs calcs = Data.map (union_overwrite calc_eq calcs)

   structure Data = Theory_Data (

     type T = (term * (spec * (term list -> (term * term list) list))) list;

     val empty = [];

     val extend = I;

     val merge = merge cas_eq;

     );                                                              

   fun get_cas thy = Data.get thy

   fun add_cas cas = Data.map (union_overwrite cas_eq cas)

   (*etc*)

 end;

 *}

 section {* Re-use existing access functions for knowledge elements *}

 text {*

   The independence of problems' and methods' structure enforces the accesse

   functions to use "Isac", the final theory which comprises all knowledge defined.

 *}

 ML {*

 (* in this phase of removing Unsynchornized.ref we do NOT overwrite the existing function! *)

 fun assoc_rls (rls' : rls') = (*SWITCH outcommented*)

   case AList.lookup (op =) (KEStore_Elems.get_rlss (Thy_Info.get_theory "Isac")) rls' of

     SOME (_, rls) => rls

   | NONE => raise ERROR ("rls \""^ rls' ^ "\" missing in KEStore.\n" ^

     "TODO exception hierarchy needs to be established.")

 fun assoc_rls' thy (rls' : rls') = (*SWITCH outcommented*)

   case AList.lookup (op =) (KEStore_Elems.get_rlss thy) rls' of

     SOME (_, rls) => rls

   | NONE => raise ERROR ("rls \""^ rls' ^ "\" missing in KEStore.\n" ^

     "TODO exception hierarchy needs to be established.")

 fun assoc_calc thy calID = let

     fun ass ([], key) =

           error ("assoc_calc: '" ^ key ^ "' not found in theory " ^ (Context.theory_name thy))

       | ass ((calc, (keyi, _)) :: pairs, key) =

           if key = keyi then calc else ass (pairs, key);

   in ass (thy |> KEStore_Elems.get_calcs, calID) end;

 fun assoc_calc' thy key = let

     fun ass ([], key') =

           error ("assoc_calc': '" ^ key' ^ "' not found in theory " ^ (Context.theory_name thy))

       | ass ((all as (keyi, _)) :: pairs, key') =

           if key' = keyi then all else ass (pairs, key');

   in ass (KEStore_Elems.get_calcs thy, key) end;

 fun assoc_cas cas' =

   case AList.lookup (op =) (Thy_Info.get_theory "Isac" |> KEStore_Elems.get_rlss) cas' of

     SOME (_, cas) => cas

   | NONE => raise ERROR ("cas \""^ cas' ^ "\" missing in KEStore.\n" ^

       "TODO exception hierarchy needs to be established.")

 *}

 setup {* KEStore_Elems.add_rlss 

   [("e_rls", (Context.theory_name @{theory}, e_rls)), 

   ("e_rrls", (Context.theory_name @{theory}, e_rrls))] *}

 section {* Functions for checking KEStore_Elems *}

 ML {*

 fun short_string_of_rls Erls = "Erls"

   | short_string_of_rls (Rls {calc, rules, ...}) =

     "Rls {#calc = " ^ string_of_int (length calc) ^

     ", #rules = " ^ string_of_int (length rules) ^ ", ..."

   | short_string_of_rls (Seq {calc, rules, ...}) =

     "Seq {#calc = " ^ string_of_int (length calc) ^

     ", #rules = " ^ string_of_int (length rules) ^ ", ..."

   | short_string_of_rls (Rrls _) = "Rrls {...}";

 fun check_kestore_rls (rls', (thyID, rls)) =

   "(" ^ rls' ^ ", (" ^ thyID ^ ", " ^ short_string_of_rls rls ^ "))";

 fun check_kestore_calc ((id, (c, _)) : calc)  = "(" ^ id ^ ", (" ^ c ^ ", fn))";

 fun check_kestore_cas ((t, (s, _)):cas_elem) =

   "(" ^ (term_to_string''' @{theory} t) ^ ", " ^ (spec2str s) ^ ")";

 *}

 end