(* Title:  CalcElements/thmC.sml

   Author: Walther Neuper

   (c) due to copyright terms

TODO: use "ThmC" for renaming identifiers.

Probably this structure can be dropped due to improvements of Isabelle.

*)

signature THEOREM_ISAC =

sig

(*datatype T = Rule_Def.Thm  ..ERROR: cannot get out from Rule_Def.rule*)

(*/------- to ThmC.sml ------\*)

  eqtype thmID

  type thm'

  type thm''

  val thmID_of_derivation_name: string -> string

  val thmID_of_derivation_name': thm -> string

  val thm''_of_thm: thm -> thm''

  val thm_of_thm: Rule.rule -> thm

  val string_of_thmI: thm -> string

(* ---- for tests only: shifted from below to remove the Warning "unused" at fun.def. --------- *)

  val thm2str: thm -> string

  val thms2str : thm list -> string

(*/-------------------------------------------------------- ! aktivate for Test_Isac BEGIN ---\* )

  val string_of_thm: thm -> string

  val string_of_thm': theory -> thm -> string

( *\--- ! aktivate for Test_Isac END ----------------------------------------------------------/*)

(*/------- to ThmC.sml ------\*)

    val id_of_thm: Rule.rule -> string

(*\------- to ThmC.sml ------/*)

end

(**)

structure ThmC(**): THEOREM_ISAC(**) =

struct

(**)

(*datatype T = Rule_Def.Thm  ..ERROR: cannot get out from Rule_Def.rule*)

(* TODO CLEANUP Thm:

Thm (string, thm): (a) needs string to identify sym_thmID for handling in front-end;

                   (b) investigate if ""RS sym" attaches a [.]" still occurs: ThmC.string_of_thmI

thmID            : type for data from user input + program

thmDeriv         : type for thy_hierarchy ONLY

obsolete types   : thm' (SEE "ad thm'"), thm''. 

revise funs      : id_of_thm, thm_of_thm, rep_thm_G', eq_thmI, eq_thmI', thm''_of_thm thm.

activate         : thmID_of_derivation_name'

*)

type thmID = string;    (* identifier for a thm (the shortest possible identifier)       *)

type thm' = thmID * Rule.cterm';(*WN060610 deprecated in favour of thm''; WN180324: used in TODO review:

val thm'2xml : int -> ThmC.thm' -> Celem.xml

val assoc_thm': theory -> ThmC.thm' -> thm

| Calculate' of ThyC.theory' * string * term * (term * ThmC.thm')

*)

(* tricky combination of (string, term) for theorems in Isac:

  * case 1 general: frontend + lucin, e.g. applicable_in..Rewrite: (thmID, _) --> (thmID, thm)

    by Global_Theory.get_thm, special cases ("add_commute",..) see convert_metaview_to_thmid.

  * case 2 "sym_..": Global_Theory.get_thm..RS sym

  * case 3 ad-hoc thm "#..." mk_thm from ad-hoc term (numerals only) in calculate_:

    from applicable_in..Calculate: opstr --calculate_/adhoc_thm--> (thmID, thm)

*)

type thm'' = thmID * thm; (* only for transport via libisabelle isac-java <--- ME *)

fun thm2str thm =

  let

    val t = Thm.prop_of thm

    val ctxt = Proof_Context.init_global (Thy_Info.get_theory ("Isac.Isac_Knowledge"))

    val ctxt' = Config.put show_markup false ctxt

  in Print_Mode.setmp [] (Syntax.string_of_term ctxt') t end;

fun thms2str thms = (strs2str o (map thm2str)) thms

(*check for [.] as caused by "fun assoc_thm'"*)

fun string_of_thm thm = UnparseC.term_to_string' (ThyC.thy2ctxt' "Isac_Knowledge") (Thm.prop_of thm)

fun string_of_thm' thy thm = UnparseC.term_to_string' (ThyC.thy2ctxt thy) (Thm.prop_of thm)

fun string_of_thmI thm =

  let 

    val str = (de_quote o string_of_thm) thm

    val (a, b) = split_nlast (5, Symbol.explode str)

  in 

    case b of

      [" ", " ","[", ".", "]"] => implode a

    | _ => str

  end

fun id_of_thm (Rule.Thm (id, _)) = id  (* TODO re-arrange code for rule2str *)

  | id_of_thm _ = raise ERROR ("id_of_thm: uncovered case " (* ^ rule2str r *))

fun thmID_of_derivation_name dn = last_elem (space_explode "." dn);

fun thmID_of_derivation_name' thm = (thmID_of_derivation_name o Thm.get_name_hint) thm

fun thyID_of_derivation_name dn = hd (space_explode "." dn);

fun thm_of_thm (Rule.Thm (_, thm)) = thm  (* TODO re-arrange code for rule2str *)

  | thm_of_thm _ = raise ERROR ("thm_of_thm: uncovered case " (* ^ rule2str r *))

fun thm''_of_thm thm = (thmID_of_derivation_name' thm, thm) : thm''

(**)end(**)