src/Tools/isac/Interpret/calchead.sml
author Walther Neuper <neuper@ist.tugraz.at>
Tue, 14 Sep 2010 12:12:42 +0200
branchisac-update-Isa09-2
changeset 38009 b49723351533
parent 37984 972a73d7c50b
child 38010 a37a3ab989f4
permissions -rw-r--r--
adapted is_copy_named from v___ to v'''

Unclear comment for 'fun is_copy_named_generating',
thus probably still broken; waiting for further tests.
Tests are still run from Build_Isac.
     1 (* Specify-phase: specifying and modeling a problem or a subproblem. The
     2    most important types are declared in mstools.sml.
     3    author: Walther Neuper
     4    991122
     5    (c) due to copyright terms
     6 
     7 use"ME/calchead.sml";
     8 use"calchead.sml";
     9 12345678901234567890123456789012345678901234567890123456789012345678901234567890
    10         10        20        30        40        50        60        70        80
    11 *)
    12 
    13 (* TODO interne Funktionen aus sig entfernen *)
    14 signature CALC_HEAD =
    15   sig
    16     datatype additm = Add of SpecifyTools.itm | Err of string
    17     val all_dsc_in : SpecifyTools.itm_ list -> Term.term list
    18     val all_modspec : ptree * pos' -> ptree * pos'
    19     datatype appl = Appl of tac_ | Notappl of string
    20     val appl_add :
    21        theory ->
    22        string ->
    23        SpecifyTools.ori list ->
    24        SpecifyTools.itm list ->
    25        (string * (Term.term * Term.term)) list -> cterm' -> additm
    26     type calcstate
    27     type calcstate'
    28     val chk_vars : term ppc -> string * Term.term list
    29     val chktyp :
    30        theory -> int * term list * term list -> term
    31     val chktyps :
    32        theory -> term list * term list -> term list
    33     val complete_metitms :
    34    SpecifyTools.ori list ->
    35    SpecifyTools.itm list ->
    36    SpecifyTools.itm list -> pat list -> SpecifyTools.itm list
    37     val complete_mod_ : ori list * pat list * pat list * itm list ->
    38 			itm list * itm list
    39     val complete_mod : ptree * pos' -> ptree * (pos * pos_)
    40     val complete_spec : ptree * pos' -> ptree * pos'
    41     val cpy_nam :
    42        pat list -> preori list -> pat -> preori
    43     val e_calcstate : calcstate
    44     val e_calcstate' : calcstate'
    45     val eq1 : ''a -> 'b * (''a * 'c) -> bool
    46     val eq3 :
    47        ''a -> Term.term -> 'b * 'c * 'd * ''a * SpecifyTools.itm_ -> bool
    48     val eq4 : ''a -> 'b * ''a list * 'c * 'd * 'e -> bool
    49     val eq5 :
    50        'a * 'b * 'c * 'd * SpecifyTools.itm_ ->
    51        'e * 'f * 'g * Term.term * 'h -> bool
    52     val eq_dsc : SpecifyTools.itm * SpecifyTools.itm -> bool
    53     val eq_pos' : ''a * pos_ -> ''a * pos_ -> bool
    54     val f_mout : theory -> mout -> Term.term
    55     val filter_outs :
    56        SpecifyTools.ori list ->
    57        SpecifyTools.itm list -> SpecifyTools.ori list
    58     val filter_pbt :
    59        SpecifyTools.ori list ->
    60        ('a * (Term.term * 'b)) list -> SpecifyTools.ori list
    61     val foldl1 : ('a * 'a -> 'a) -> 'a list -> 'a
    62     val foldr1 : ('a * 'a -> 'a) -> 'a list -> 'a
    63     val form : 'a -> ptree -> (string * ('a * pos_) * Term.term) list
    64     val formres : 'a -> ptree -> (string * ('a * pos_) * Term.term) list
    65     val gen_ins' : ('a * 'a -> bool) -> 'a * 'a list -> 'a list
    66     val get_formress :
    67        (string * (pos * pos_) * Term.term) list list ->
    68        pos -> ptree list -> (string * (pos * pos_) * Term.term) list
    69     val get_forms :
    70        (string * (pos * pos_) * Term.term) list list ->
    71        posel list -> ptree list -> (string * (pos * pos_) * Term.term) list
    72     val get_interval : pos' -> pos' -> int -> ptree -> (pos' * term) list
    73     val get_ocalhd : ptree * pos' -> ocalhd
    74     val get_spec_form : tac_ -> pos' -> ptree -> mout
    75     val geti_ct :
    76        theory ->
    77        SpecifyTools.ori -> SpecifyTools.itm -> string * cterm'
    78     val getr_ct : theory -> SpecifyTools.ori -> string * cterm'
    79     val has_list_type : Term.term -> bool
    80     val header : pos_ -> pblID -> metID -> pblmet
    81     val insert_ppc :
    82        theory ->
    83        int * SpecifyTools.vats * bool * string * SpecifyTools.itm_ ->
    84        SpecifyTools.itm list -> SpecifyTools.itm list
    85     val insert_ppc' :
    86        SpecifyTools.itm -> SpecifyTools.itm list -> SpecifyTools.itm list
    87     val is_complete_mod : ptree * pos' -> bool
    88     val is_complete_mod_ : SpecifyTools.itm list -> bool
    89     val is_complete_modspec : ptree * pos' -> bool
    90     val is_complete_spec : ptree * pos' -> bool
    91     val is_copy_named : 'a * ('b * Term.term) -> bool
    92     val is_copy_named_idstr : string -> bool
    93     val is_error : SpecifyTools.itm_ -> bool
    94     val is_field_correct : ''a -> ''b -> (''a * ''b list) list -> bool
    95     val is_known :
    96        theory ->
    97        string ->
    98        SpecifyTools.ori list ->
    99        Term.term -> string * SpecifyTools.ori * Term.term list
   100     val is_list_type : Term.typ -> bool
   101     val is_notyet_input :
   102        theory ->
   103        SpecifyTools.itm list ->
   104        Term.term list ->
   105        SpecifyTools.ori ->
   106        ('a * (Term.term * Term.term)) list -> string * SpecifyTools.itm
   107     val is_parsed : SpecifyTools.itm_ -> bool
   108     val is_untouched : SpecifyTools.itm -> bool
   109     val matc :
   110        theory ->
   111        pat list ->
   112        Term.term list ->
   113        (int list * string * Term.term * Term.term list) list ->
   114        (int list * string * Term.term * Term.term list) list
   115     val match_ags :
   116        theory -> pat list -> Term.term list -> SpecifyTools.ori list
   117     val maxl : int list -> int
   118     val match_ags_msg : string list -> Term.term -> Term.term list -> unit
   119     val memI : ''a list -> ''a -> bool
   120     val mk_additem : string -> cterm' -> tac
   121     val mk_delete : theory -> string -> SpecifyTools.itm_ -> tac
   122     val mtc :
   123        theory -> pat -> Term.term -> SpecifyTools.preori option
   124     val nxt_add :
   125        theory ->
   126        SpecifyTools.ori list ->
   127        (string * (Term.term * 'a)) list ->
   128        SpecifyTools.itm list -> (string * cterm') option
   129     val nxt_model_pbl : tac_ -> ptree * (int list * pos_) -> tac_
   130     val nxt_spec :
   131        pos_ ->
   132        bool ->
   133        SpecifyTools.ori list ->
   134        spec ->
   135        SpecifyTools.itm list * SpecifyTools.itm list ->
   136        (string * (Term.term * 'a)) list * (string * (Term.term * 'b)) list ->
   137        spec -> pos_ * tac
   138     val nxt_specif : tac -> ptree * (int list * pos_) -> calcstate'
   139     val nxt_specif_additem :
   140        string -> cterm' -> ptree * (int list * pos_) -> calcstate'
   141     val nxt_specify_init_calc : fmz -> calcstate
   142     val ocalhd_complete :
   143        SpecifyTools.itm list ->
   144        (bool * Term.term) list -> domID * pblID * metID -> bool
   145     val ori2Coritm :
   146 	pat list -> ori -> itm
   147     val ori_2itm :
   148        'a ->
   149        SpecifyTools.itm_ ->
   150        Term.term -> Term.term list -> SpecifyTools.ori -> SpecifyTools.itm
   151     val overwrite_ppc :
   152        theory ->
   153        int * SpecifyTools.vats * bool * string * SpecifyTools.itm_ ->
   154        SpecifyTools.itm list ->
   155        (int * SpecifyTools.vats * bool * string * SpecifyTools.itm_) list
   156     val parse_ok : SpecifyTools.itm_ list -> bool
   157     val posform2str : pos' * ptform -> string
   158     val posforms2str : (pos' * ptform) list -> string
   159     val posterms2str : (pos' * term) list -> string (*tests only*)
   160     val ppc135list : 'a SpecifyTools.ppc -> 'a list
   161     val ppc2list : 'a SpecifyTools.ppc -> 'a list
   162     val pt_extract :
   163        ptree * (int list * pos_) ->
   164        ptform * tac option * Term.term list
   165     val pt_form : ppobj -> ptform
   166     val pt_model : ppobj -> pos_ -> ptform
   167     val reset_calchead : ptree * pos' -> ptree * pos'
   168     val seek_oridts :
   169        theory ->
   170        string ->
   171        Term.term * Term.term list ->
   172        (int * SpecifyTools.vats * string * Term.term * Term.term list) list
   173        -> string * SpecifyTools.ori * Term.term list
   174     val seek_orits :
   175        theory ->
   176        string ->
   177        Term.term list ->
   178        (int * SpecifyTools.vats * string * Term.term * Term.term list) list
   179        -> string * SpecifyTools.ori * Term.term list
   180     val seek_ppc :
   181        int -> SpecifyTools.itm list -> SpecifyTools.itm option
   182     val show_pt : ptree -> unit
   183     val some_spec : spec -> spec -> spec
   184     val specify :
   185        tac_ ->
   186        pos' ->
   187        cid ->
   188        ptree ->
   189        (posel list * pos_) * ((posel list * pos_) * istate) * mout * tac *
   190        safe * ptree
   191     val specify_additem :
   192        string ->
   193        cterm' * 'a ->
   194        int list * pos_ ->
   195        'b ->
   196        ptree ->
   197        (pos * pos_) * ((pos * pos_) * istate) * mout * tac * safe * ptree
   198     val tag_form : theory -> term * term -> term
   199     val test_types : theory -> Term.term * Term.term list -> string
   200     val typeless : Term.term -> Term.term
   201     val unbound_ppc : term SpecifyTools.ppc -> Term.term list
   202     val vals_of_oris : SpecifyTools.ori list -> Term.term list
   203     val variants_in : Term.term list -> int
   204     val vars_of_pbl_ : ('a * ('b * Term.term)) list -> Term.term list
   205     val vars_of_pbl_' : ('a * ('b * Term.term)) list -> Term.term list
   206   end
   207  
   208 
   209 
   210 
   211 
   212 (*---------------------------------------------------------------------*)
   213 structure CalcHead (**): CALC_HEAD(**) =
   214 
   215 struct
   216 (*---------------------------------------------------------------------*)
   217 
   218 (* datatypes *)
   219 
   220 (*.the state wich is stored after each step of calculation; it contains
   221    the calc-state and a list of [tac,istate](="tacis") to be applied.
   222    the last_elem tacis is the first to apply to the calc-state and
   223    the (only) one shown to the front-end as the 'proposed tac'.
   224    the calc-state resulting from the application of tacis is not stored,
   225    because the tacis hold enought information for efficiently rebuilding
   226    this state just by "fun generate ".*)
   227 type calcstate = 
   228      (ptree * pos') *    (*the calc-state to which the tacis could be applied*)
   229      (taci list);        (*ev. several (hidden) steps; 
   230                            in REVERSE order: first tac_ to apply is last_elem*)
   231 val e_calcstate = ((EmptyPtree, e_pos'), [e_taci]):calcstate;
   232 
   233 (*the state used during one calculation within the mathengine; it contains
   234   a list of [tac,istate](="tacis") which generated the the calc-state;
   235   while this state's tacis are extended by each (internal) step,
   236   the calc-state is used for creating new nodes in the calc-tree
   237   (eg. applicable_in requires several particular nodes of the calc-tree)
   238   and then replaced by the the newly created;
   239   on leave of the mathengine the resuing calc-state is dropped anyway,
   240   because the tacis hold enought information for efficiently rebuilding
   241   this state just by "fun generate ".*)
   242 type calcstate' = 
   243      taci list *        (*cas. several (hidden) steps; 
   244                           in REVERSE order: first tac_ to apply is last_elem*)
   245      pos' list *        (*a "continuous" sequence of pos',
   246 			 deleted by application of taci list*)     
   247      (ptree * pos');    (*the calc-state resulting from the application of tacis*)
   248 val e_calcstate' = ([e_taci], [e_pos'], (EmptyPtree, e_pos')):calcstate';
   249 
   250 (*FIXXXME.WN020430 intermediate hack for fun ass_up*)
   251 fun f_mout thy (Form' (FormKF (_,_,_,_,f))) = (term_of o the o (parse thy)) f
   252   | f_mout thy _ = raise error "f_mout: not called with formula";
   253 
   254 
   255 (*.is the calchead complete ?.*)
   256 fun ocalhd_complete (its: itm list) (pre: (bool * term) list) (dI,pI,mI) = 
   257     foldl and_ (true, map #3 its) andalso 
   258     foldl and_ (true, map #1 pre) andalso 
   259     dI<>e_domID andalso pI<>e_pblID andalso mI<>e_metID;
   260 
   261 
   262 (* make a term 'typeless' for comparing with another 'typeless' term;
   263    'type-less' usually is illtyped                                  *)
   264 fun typeless (Const(s,_)) = (Const(s,e_type)) 
   265   | typeless (Free(s,_)) = (Free(s,e_type))
   266   | typeless (Var(n,_)) = (Var(n,e_type))
   267   | typeless (Bound i) = (Bound i)
   268   | typeless (Abs(s,_,t)) = Abs(s,e_type, typeless t)
   269   | typeless (t1 $ t2) = (typeless t1) $ (typeless t2);
   270 (*
   271 > val (SOME ct) = parse thy "max_relation (A=#2*a*b - a^^^#2)";
   272 > val (_,t1) = split_dsc_t hs (term_of ct);
   273 > val (SOME ct) = parse thy "A=#2*a*b - a^^^#2";
   274 > val (_,t2) = split_dsc_t hs (term_of ct);
   275 > typeless t1 = typeless t2;
   276 val it = true : bool
   277 *)
   278 
   279 
   280 
   281 (*.to an input (d,ts) find the according ori and insert the ts.*)
   282 (*WN.11.03: + dont take first inter<>[]*)
   283 fun seek_oridts thy sel (d,ts) [] = 
   284   ("'"^(Syntax.string_of_term (thy2ctxt thy) (comp_dts thy (d,ts)))^
   285    "' not found (typed)", (0,[],sel,d,ts):ori, [])
   286   (* val (id,vat,sel',d',ts')::oris = ori;
   287      val (id,vat,sel',d',ts') = ori;
   288      *)
   289   | seek_oridts thy sel (d,ts) ((id,vat,sel',d',ts')::(oris:ori list)) =
   290     if sel = sel' andalso d=d' andalso (inter op = ts ts') <> [] 
   291     then if sel = sel' 
   292 	 then ("", 
   293                (id,vat,sel,d, inter op = ts ts'):ori, 
   294                ts')
   295 	 else ((Syntax.string_of_term (thy2ctxt thy) (comp_dts thy (d,ts))) 
   296                ^ " not for " ^ sel, 
   297                e_ori_, 
   298                [])
   299     else seek_oridts thy sel (d,ts) oris;
   300 
   301 (*.to an input (_,ts) find the according ori and insert the ts.*)
   302 fun seek_orits thy sel ts [] = 
   303   ("'"^
   304    (strs2str (map (Syntax.string_of_term (thy2ctxt thy)) ts))^
   305    "' not found (typed)", e_ori_, [])
   306   | seek_orits thy sel ts ((id,vat,sel',d,ts')::(oris:ori list)) =
   307     if sel = sel' andalso (inter op = ts ts') <> [] 
   308       then if sel = sel' 
   309 	   then ("",
   310                  (id,vat,sel,d, inter op = ts ts'):ori, 
   311                  ts')
   312 	   else (((strs2str' o map (Syntax.string_of_term (thy2ctxt thy))) ts)
   313                  ^ " not for "^sel, 
   314                  e_ori_, 
   315                  [])
   316     else seek_orits thy sel ts oris;
   317 (* false
   318 > val ((id,vat,sel',d,ts')::(ori':ori)) = ori;
   319 > seek_orits thy sel ts [(id,vat,sel',d,ts')];
   320 uncaught exception TYPE
   321 > seek_orits thy sel ts [];
   322 uncaught exception TYPE
   323 *)
   324 
   325 (*find_first item with #1 equal to id*)
   326 fun seek_ppc id [] = NONE
   327   | seek_ppc id (p::(ppc:itm list)) =
   328     if id = #1 p then SOME p else seek_ppc id ppc;
   329 
   330 
   331 
   332 (*---------------------------------------------(3) nach ptyps.sml 23.3.02*)
   333 
   334 
   335 datatype appl = Appl of tac_ | Notappl of string;
   336 
   337 fun ppc2list ({Given=gis,Where=whs,Find=fis,
   338 	       With=wis,Relate=res}: 'a ppc) =
   339   gis @ whs @ fis @ wis @ res;
   340 fun ppc135list ({Given=gis,Find=fis,Relate=res,...}: 'a ppc) =
   341   gis @ fis @ res;
   342 
   343 
   344 
   345 
   346 (* get the number of variants in a problem in 'original',
   347    assumes equal descriptions in immediate sequence    *)
   348 fun variants_in ts =
   349   let fun eq(x,y) = head_of x = head_of y;
   350     fun cnt eq [] y n = ([n],[])
   351       | cnt eq (x::xs) y n = if eq(x,y) then cnt eq xs y (n+1)
   352 			     else ([n], x::xs);
   353     fun coll eq  xs [] = xs
   354       | coll eq  xs (y::ys) = 
   355       let val (n,ys') = cnt eq (y::ys) y 0;
   356       in if ys' = [] then xs @ n else coll eq  (xs @ n) ys' end;
   357     val vts = subtract op = [1] (distinct (coll eq [] ts));
   358   in case vts of [] => 1 | [n] => n
   359       | _ => error "different variants in formalization" end;
   360 (*
   361 > cnt (op=) [2,2,2,4,5,5,5,5,5] 2 0;
   362 val it = ([3],[4,5,5,5,5,5]) : int list * int list
   363 > coll (op=) [] [1,2,2,2,4,5,5,5,5,5];
   364 val it = [1,3,1,5] : int list
   365 *)
   366 
   367 fun is_list_type (Type("List.list",_)) = true
   368   | is_list_type _ = false;
   369 (* fun destr (Type(str,sort)) = (str,sort);
   370 > val (SOME ct) = parse thy "lll::real list";
   371 > val ty = (#T o rep_cterm) ct;
   372 > is_list_type ty;
   373 val it = true : bool 
   374 > destr ty;
   375 val it = ("List.list",["RealDef.real"]) : string * typ list
   376 > atomty ((#t o rep_cterm) ct);
   377 *** -------------
   378 *** Free ( lll, real list)
   379 val it = () : unit
   380  
   381 > val (SOME ct) = parse thy "[lll::real]";
   382 > val ty = (#T o rep_cterm) ct;
   383 > is_list_type ty;
   384 val it = true : bool 
   385 > destr ty;
   386 val it = ("List.list",["'a"]) : string * typ list
   387 > atomty ((#t o rep_cterm) ct);
   388 *** -------------
   389 *** Const ( List.list.Cons, [real, real list] => real list)
   390 ***   Free ( lll, real)
   391 ***   Const ( List.list.Nil, real list) 
   392 
   393 > val (SOME ct) = parse thy "lll";
   394 > val ty = (#T o rep_cterm) ct;
   395 > is_list_type ty;
   396 val it = false : bool  *)
   397 
   398 
   399 fun has_list_type (Free(_,T)) = is_list_type T
   400   | has_list_type _ = false;
   401 (*
   402 > val (SOME ct) = parse thy "lll::real list";
   403 > has_list_type (term_of ct);
   404 val it = true : bool
   405 > val (SOME ct) = parse thy "[lll::real]";
   406 > has_list_type (term_of ct);
   407 val it = false : bool *)
   408 
   409 fun is_parsed (Syn _) = false
   410   | is_parsed _ = true;
   411 fun parse_ok its = foldl and_ (true, map is_parsed its);
   412 
   413 fun all_dsc_in itm_s =
   414   let    
   415     fun d_in (Cor ((d,_),_)) = [d]
   416       | d_in (Syn c) = []
   417       | d_in (Typ c) = []
   418       | d_in (Inc ((d,_),_)) = [d]
   419       | d_in (Sup (d,_)) = [d]
   420       | d_in (Mis (d,_)) = [d];
   421   in (flat o (map d_in)) itm_s end;  
   422 
   423 (* 30.1.00 ---
   424 fun is_Syn (Syn _) = true
   425   | is_Syn (Typ _) = true
   426   | is_Syn _ = false;
   427  --- *)
   428 fun is_error (Cor (_,ts)) = false
   429   | is_error (Sup (_,ts)) = false
   430   | is_error (Inc (_,ts)) = false
   431   | is_error (Mis (_,ts)) = false
   432   | is_error _ = true;
   433 
   434 (* 30.1.00 ---
   435 fun ct_in (Syn (c)) = c
   436   | ct_in (Typ (c)) = c
   437   | ct_in _ = raise error "ct_in called for Cor .. Sup";
   438  --- *)
   439 
   440 (*#############################################################*)
   441 (*#############################################################*)
   442 (* vvv--- aus nnewcode.sml am 30.1.00 ---vvv *)
   443 
   444 
   445 (* testdaten besorgen:
   446    use"test-coil-kernel.sml";
   447    val (PblObj{origin=(oris,_,_),meth={ppc=itms,...},...}) = 
   448         get_obj I pt p;
   449   *)
   450 
   451 (* given oris, ppc, 
   452    variant V: oris union ppc => int, id ID: oris union ppc => int
   453 
   454    ppc is_complete == 
   455      EX vt:V. ALL r:oris --> EX i:ppc. ID r = ID i  &  complete i
   456 
   457    and
   458      @vt = max sum(i : ppc) V i
   459 *)
   460 
   461 
   462 
   463 (*
   464 > ((vts_cnt (vts_in itms))) itms;
   465 
   466 
   467 
   468 ---^^--test 10.3.
   469 > val vts = vts_in itms;
   470 val vts = [1,2,3] : int list
   471 > val nvts = vts_cnt vts itms;
   472 val nvts = [(1,6),(2,5),(3,7)] : (int * int) list
   473 > val mx = max2 nvts;
   474 val mx = (3,7) : int * int
   475 > val v = max_vt itms;
   476 val v = 3 : int
   477 --------------------------
   478 > 
   479 *)
   480 
   481 (*.get the first term in ts from ori.*)
   482 (* val (_,_,fd,d,ts) = hd miss;
   483    *)
   484 fun getr_ct thy ((_,_,fd,d,ts):ori) =
   485   (fd, ((Syntax.string_of_term (thy2ctxt thy)) o 
   486         (comp_dts thy)) (d,[hd ts]):cterm');
   487 (* val t = comp_dts thy (d,[hd ts]);
   488    *)
   489 
   490 (* get a term from ori, notyet input in itm *)
   491 fun geti_ct thy ((_,_,_,d,ts):ori) ((_,_,_,fd,itm_):itm) =  
   492   (fd, ((Syntax.string_of_term (thy2ctxt thy)) o (comp_dts thy)) 
   493            (d, subtract op = (ts_in itm_) ts):cterm');
   494 (* test-maximum.sml fmy <> [], Init_Proof ...
   495    val (_,_,_,d,ts) = ori; val (_,_,_,fd,itm_) = hd icl;
   496    val d' $ ts' = (term_of o the o (parse thy)) "fixedValues [r=Arbfix]";
   497    atomty d;
   498    atomty d';
   499    atomty (hd ts);
   500    atomty ts';
   501    cterm_of thy (d $ (hd ts));
   502    cterm_of thy (d' $ ts');
   503 
   504    comp_dts thy (d,ts);
   505    *)
   506 
   507 
   508 (* in FE dsc, not dat: this is in itms ...*)
   509 fun is_untouched ((_,_,false,_,Inc((_,[]),_)):itm) = true
   510   | is_untouched _ = false;
   511 
   512 
   513 (* select an item in oris, notyet input in itms 
   514    (precondition: in itms are only Cor, Sup, Inc) *)
   515 local infix mem;
   516 fun x mem [] = false
   517   | x mem (y :: ys) = x = y orelse x mem ys;
   518 in 
   519 fun nxt_add thy ([]:ori list) pbt itms = (*root (only) ori...fmz=[]*)
   520   let
   521     fun test_d d ((i,_,_,_,itm_):itm) = (d = (d_in itm_)) andalso i<>0; 
   522     fun is_elem itms (f,(d,t)) = 
   523       case find_first (test_d d) itms of 
   524 	SOME _ => true | NONE => false;
   525   in case filter_out (is_elem itms) pbt of
   526 (* val ((f,(d,_))::itms) = filter_out (is_elem itms) pbt;
   527    *)
   528     (f,(d,_))::itms => 
   529       SOME (f:string, ((Syntax.string_of_term (thy2ctxt thy)) o comp_dts thy) (d,[]):cterm')
   530   | _ => NONE end
   531 
   532 (* val (thy,itms) = (assoc_thy (if dI=e_domID then dI' else dI),pbl);
   533    *)
   534   | nxt_add thy oris pbt itms =
   535   let
   536     fun testr_vt v ori = (curry (op mem) v) (#2 (ori:ori))
   537       andalso (#3 ori) <>"#undef";
   538     fun testi_vt v itm = (curry (op mem) v) (#2 (itm:itm));
   539     fun test_id ids r = curry (op mem) (#1 (r:ori)) ids;
   540 (* val itm = hd icl; val (_,_,_,d,ts) = v6;
   541    *)
   542     fun test_subset (itm:itm) ((_,_,_,d,ts):ori) = 
   543 	(d_in (#5 itm)) = d andalso subset op = (ts_in (#5 itm), ts);
   544     fun false_and_not_Sup((i,v,false,f,Sup _):itm) = false
   545       | false_and_not_Sup (i,v,false,f, _) = true
   546       | false_and_not_Sup  _ = false;
   547 
   548     val v = if itms = [] then 1 else max_vt itms;
   549     val vors = if v = 0 then oris else filter (testr_vt v) oris;(*oris..vat*)
   550     val vits = if v = 0 then itms (*because of dsc without dat*)
   551 	       else filter (testi_vt v) itms;                   (*itms..vat*)
   552     val icl = filter false_and_not_Sup vits; (* incomplete *)
   553   in if icl = [] 
   554      then case filter_out (test_id (map #1 vits)) vors of
   555 	      [] => NONE
   556 	    (* val miss = filter_out (test_id (map #1 vits)) vors;
   557 	       *)
   558 	    | miss => SOME (getr_ct thy (hd miss))
   559      else
   560 	 case find_first (test_subset (hd icl)) vors of
   561 	     (* val SOME ori = find_first (test_subset (hd icl)) vors;
   562 	      *)
   563 	     NONE => raise error "nxt_add: EX itm. not(dat(itm)<=dat(ori))"
   564 	   | SOME ori => SOME (geti_ct thy ori (hd icl))
   565   end
   566 end;
   567 
   568 
   569 
   570 fun mk_delete thy "#Given"  itm_ = Del_Given   (itm_out thy itm_)
   571   | mk_delete thy "#Find"   itm_ = Del_Find    (itm_out thy itm_)
   572   | mk_delete thy "#Relate" itm_ = Del_Relation(itm_out thy itm_)
   573   | mk_delete thy str _ = 
   574   raise error ("mk_delete: called with field '"^str^"'");
   575 fun mk_additem "#Given" ct = Add_Given ct
   576   | mk_additem "#Find"  ct = Add_Find ct    
   577   | mk_additem "#Relate"ct = Add_Relation ct
   578   | mk_additem str _ = 
   579   raise error ("mk_additem: called with field '"^str^"'");
   580 
   581 
   582 
   583 
   584 
   585 (* find the next tac in specify (except nxt_model_pbl)
   586    4.00.: TODO: do not return a pos !!!
   587           (sind from DG comes the _OLD_ writepos)*)
   588 (* 
   589 > val (pbl,pbt,mpc) =(pbl',get_pbt cpI,(#ppc o get_met) cmI);
   590 > val (dI,pI,mI) = empty_spec;
   591 > nxt_spec Pbl (oris:ori list) ((dI',pI',mI'):spec(*original*))
   592   ((pbl:itm list), (met:itm list)) (pbt,mpc) ((dI,pI,mI):spec);
   593 
   594 at Init_Proof:
   595 > val met = [];val (pbt,mpc) = (get_pbt pI',(#ppc o get_met) mI');
   596 > val (dI,pI,mI) = empty_spec;
   597 > nxt_spec Pbl (oris:ori list) ((dI',pI',mI'):spec(*original*))
   598   ((pbl:itm list), (met:itm list)) (pbt,mpc) ((dI,pI,mI):spec);
   599   *)
   600 
   601 (*. determine the next step of specification;
   602     not done here: Refine_Tacitly (otherwise *** unknown method: (..., no_met))
   603 eg. in rootpbl 'no_met': 
   604 args:
   605   preok          predicates are _all_ ok, or problem matches completely
   606   oris           immediately from formalization 
   607   (dI',pI',mI')  specification coming from author/parent-problem
   608   (pbl,          item lists specified by user
   609    met)          -"-, tacitly completed by copy_probl
   610   (dI,pI,mI)     specification explicitly done by the user
   611   (pbt, mpc)     problem type, guard of method
   612 .*)
   613 (* val (preok,pbl,pbt,mpc)=(pb,pbl',(#ppc o get_pbt) cpI,(#ppc o get_met) cmI);
   614    val (preok,pbl,pbt,mpc)=(pb,pbl',ppc,(#ppc o get_met) cmI);
   615    val (Pbl, preok, oris, (dI',pI',mI'), (pbl,met), (pbt,mpc), (dI,pI,mI)) =
   616        (p_, pb, oris, (dI',pI',mI'), (probl,meth), 
   617 	(ppc, (#ppc o get_met) cmI), (dI,pI,mI));
   618    *)
   619 fun nxt_spec Pbl preok (oris:ori list) ((dI',pI',mI'):spec)
   620   ((pbl:itm list), (met:itm list)) (pbt,mpc) ((dI,pI,mI):spec) = 
   621   ((*writeln"### nxt_spec Pbl";*)
   622    if dI'=e_domID andalso dI=e_domID then (Pbl, Specify_Theory dI')
   623    else if pI'=e_pblID andalso pI=e_pblID then (Pbl, Specify_Problem pI')
   624 	else case find_first (is_error o #5) (pbl:itm list) of
   625 	  SOME (_,_,_,fd,itm_) => 
   626 	      (Pbl, mk_delete 
   627 	       (assoc_thy (if dI=e_domID then dI' else dI)) fd itm_)
   628 	| NONE => 
   629 	    ((*writeln"### nxt_spec is_error NONE";*)
   630 	     case nxt_add (assoc_thy (if dI=e_domID then dI' else dI)) 
   631 		 oris pbt pbl of
   632 (* val SOME (fd,ct') = nxt_add (assoc_thy (if dI=e_domID then dI' else dI)) 
   633                        oris pbt pbl;
   634   *)
   635 	       SOME (fd,ct') => ((*writeln"### nxt_spec nxt_add SOME";*)
   636 				 (Pbl, mk_additem fd ct'))
   637 	     | NONE => (*pbl-items complete*)
   638 	       if not preok then (Pbl, Refine_Problem pI')
   639 	       else
   640 		 if dI = e_domID then (Pbl, Specify_Theory dI')
   641 		 else if pI = e_pblID then (Pbl, Specify_Problem pI')
   642 		      else if mI = e_metID then (Pbl, Specify_Method mI')
   643 			   else
   644 			     case find_first (is_error o #5) met of
   645 			       SOME (_,_,_,fd,itm_) => 
   646 				   (Met, mk_delete (assoc_thy dI) fd itm_)
   647 			     | NONE => 
   648 				 (case nxt_add (assoc_thy dI) oris mpc met of
   649 				      SOME (fd,ct') => (*30.8.01: pre?!?*)
   650 				      (Met, mk_additem fd ct')
   651 				    | NONE => 
   652 				      ((*Solv 3.4.00*)Met, Apply_Method mI))))
   653 (* val preok=pb; val (pbl, met) = (pbl,met');
   654    val (pbt,mpc)=((#ppc o get_pbt) cpI,(#ppc o get_met) cmI);
   655    val (Met, preok, oris, (dI',pI',mI'), (pbl,met), (pbt,mpc), (dI,pI,mI)) =
   656        (p_, pb, oris, (dI',pI',mI'), (probl,meth), 
   657 	(ppc, (#ppc o get_met) cmI), (dI,pI,mI));
   658    *)
   659   | nxt_spec Met preok oris (dI',pI',mI') (pbl, met) (pbt,mpc) (dI,pI,mI) = 
   660   ((*writeln"### nxt_spec Met"; *)
   661    case find_first (is_error o #5) met of
   662      SOME (_,_,_,fd,itm_) => 
   663 	 (Met, mk_delete (assoc_thy (if dI=e_domID then dI' else dI)) fd itm_)
   664    | NONE => 
   665        case nxt_add (assoc_thy (if dI=e_domID then dI' else dI))oris mpc met of
   666 	 SOME (fd,ct') => (Met, mk_additem fd ct')
   667        | NONE => 
   668 	   ((*writeln"### nxt_spec Met: nxt_add NONE";*)
   669 	    if dI = e_domID then (Met, Specify_Theory dI')
   670 	    else if pI = e_pblID then (Met, Specify_Problem pI')
   671 		 else if not preok then (Met, Specify_Method mI)
   672 		      else (Met, Apply_Method mI)));
   673 	  
   674 (* di_ pI_ mI_ pos_
   675 val itms = [(1,[1],true,"#Find",Cor(e_term,[e_term])):itm,
   676 	    (2,[2],true,"#Find",Syn("empty"))];
   677 *)
   678 
   679 
   680 (* ^^^--- aus nnewcode.sml am 30.1.00 ---^^^ *)
   681 (*#############################################################*)
   682 (*#############################################################*)
   683 (* vvv--- aus nnewcode.sml vor 29.1.00 ---vvv *)
   684 
   685 (*3.3.--
   686 fun update_itm (cl,d,ts) ((id,vt,_,sl,Cor (_,_)):itm) = 
   687   (id,vt,cl,sl,Cor (d,ts)):itm
   688   | update_itm (cl,d,ts) (id,vt,_,sl,Syn (_)) =   
   689   raise error ("update_itm "^((Syntax.string_of_term (thy2ctxt thy)) (comp_dts thy (d,ts)))^
   690 	       " not not for Syn (s:cterm')")
   691   | update_itm (cl,d,ts) (id,vt,_,sl,Typ (_)) = 
   692   raise error ("update_itm "^((Syntax.string_of_term (thy2ctxt thy)) (comp_dts thy (d,ts)))^
   693 	       " not not for Typ (s:cterm')")
   694   | update_itm (cl,d,ts) (id,vt,_,sl,Fal (_,_)) =
   695   (id,vt,cl,sl,Fal (d,ts))
   696   | update_itm (cl,d,ts) (id,vt,_,sl,Inc (_,_)) =
   697   (id,vt,cl,sl,Inc (d,ts))
   698   | update_itm (cl,d,ts) (id,vt,_,sl,Sup (_,_)) =
   699   (id,vt,cl,sl,Sup (d,ts));
   700 *)
   701 
   702 
   703 
   704 
   705 fun is_field_correct sel d dscpbt =
   706   case assoc (dscpbt, sel) of
   707     NONE => false
   708   | SOME ds => member op = ds d;
   709 
   710 (*. update the itm_ already input, all..from ori .*)
   711 (* val (id,vt,fd,d,ts) = (i,v,f,d,ts\\ts');
   712    *)
   713 fun ori_2itm thy itm_ pid all ((id,vt,fd,d,ts):ori) = 
   714   let 
   715     val ts' = union op = (ts_in itm_) ts;
   716     val pval = pbl_ids' thy d ts'
   717 	(*WN.9.5.03: FIXXXME [#0, epsilon]
   718 	  here would upd_penv be called for [#0, epsilon] etc. *)
   719     val complete = if eq_set op = (ts', all) then true else false;
   720   in case itm_ of
   721     (Cor _) => 
   722 	(if fd = "#undef" then (id,vt,complete,fd,Sup(d,ts')) 
   723 	 else (id,vt,complete,fd,Cor((d,ts'),(pid, pval)))):itm
   724   | (Syn c)     => raise error ("ori_2itm wants to overwrite "^c)
   725   | (Typ c)     => raise error ("ori_2itm wants to overwrite "^c)
   726   | (Inc _) => if complete
   727 	       then (id,vt,true ,fd, Cor ((d,ts'),(pid, pval)))
   728 	       else (id,vt,false,fd, Inc ((d,ts'),(pid, pval)))
   729   | (Sup ((*_,_*)d,ts')) => (*4.9.01 lost env*)
   730 	 (*if fd = "#undef" then*) (id,vt,complete,fd,Sup(d,ts'))
   731 	 (*else (id,vt,complete,fd,Cor((d,ts'),e))*)
   732 (* 28.1.00: not completely clear ---^^^ etc.*)
   733 (* 4.9.01: Mis just copied---vvv *)
   734   | (Mis _) => if complete
   735 		     then (id,vt,true ,fd, Cor ((d,ts'),(pid, pval)))
   736 		     else (id,vt,false,fd, Inc ((d,ts'),(pid, pval)))
   737   end;
   738 
   739 
   740 fun eq1 d (_,(d',_)) = (d = d');
   741 fun eq3 f d (_,_,_,f',itm_) = f = f' andalso d = (d_in itm_); 
   742 
   743 
   744 (* 'all' ts from ori; ts is the input; (ori carries rest of info)
   745    9.01: this + ori_2itm is _VERY UNCLEAR_ ? overhead ?
   746    pval: value for problem-environment _NOT_ checked for 'inter' --
   747    -- FIXXME.WN.11.03 the generation of penv has to go to insert_ppc
   748   (as it has been done for input_icalhd+insert_ppc' in 11.03)*)
   749 (*. is_input ori itms <=> 
   750     EX itm. (1) ori(field,dsc) = itm(field,dsc) & (2..4)
   751             (2) ori(ts) subset itm(ts)        --- Err "already input"       
   752 	    (3) ori(ts) inter itm(ts) = empty --- new: ori(ts)
   753 	    (4) -"- <> empty                  --- new: ori(ts) \\ inter .*)
   754 (* val(itms,(i,v,f,d,ts)) = (ppc,ori');
   755    *)
   756 fun is_notyet_input thy (itms:itm list) all ((i,v,f,d,ts):ori) pbt =
   757   case find_first (eq1 d) pbt of
   758       SOME (_,(_,pid)) =>(* val SOME (_,(_,pid)) = find_first (eq1 d) pbt;
   759                             val SOME (_,_,_,_,itm_)=find_first (eq3 f d) itms;
   760 			   *)
   761       (case find_first (eq3 f d) itms of
   762 	   SOME (_,_,_,_,itm_) =>
   763 	   let 
   764 	       val ts' = inter op = (ts_in itm_) ts;
   765 	   in if subset op = (ts, ts') 
   766 	      then (((strs2str' o 
   767 		      map (Syntax.string_of_term (thy2ctxt thy))) ts')^
   768 		    " already input", e_itm)                            (*2*)
   769 	      else ("", 
   770                     ori_2itm thy itm_ pid all (i,v,f,d,
   771                                                subtract op = ts' ts))   (*3,4*)
   772 	   end
   773 	 | NONE => ("", ori_2itm thy (Inc ((e_term,[]),(pid,[]))) 
   774 				 pid all (i,v,f,d,ts))                  (*1*)
   775 	)
   776     | NONE => ("", ori_2itm thy (Sup (d,ts)) 
   777 			      e_term all (i,v,f,d,ts));
   778 
   779 fun test_types thy (d,ts) =
   780   let 
   781     val s = !show_types; val _ = show_types:= true;
   782     val opt = (try (comp_dts thy)) (d,ts);
   783     val msg = case opt of 
   784       SOME _ => "" 
   785     | NONE => ((Syntax.string_of_term (thy2ctxt thy) d)^" "^
   786 	     ((strs2str' o map (Syntax.string_of_term (thy2ctxt thy))) ts)
   787 	     ^ " is illtyped");
   788     val _ = show_types:= s
   789   in msg end;
   790 
   791 
   792 
   793 fun maxl [] = raise error "maxl of []"
   794   | maxl (y::ys) =
   795   let fun mx x [] = x
   796 	| mx x (y::ys) = if x < (y:int) then mx y ys else mx x ys
   797   in mx y ys end;
   798 
   799 
   800 (*. is the input term t known in oris ? 
   801     give feedback on all(?) strange input;
   802     return _all_ terms already input to this item (e.g. valuesFor a,b) .*)
   803 (*WN.11.03: from lists*)
   804 fun is_known thy sel ori t =
   805 (* val (ori,t)=(oris,term_of ct);
   806    *)
   807   let
   808     val ots = (distinct o flat o (map #5)) (ori:ori list);
   809     val oids = ((map (fst o dest_Free)) o distinct o 
   810 		flat o (map vars)) ots;
   811     val (d,ts(*,pval*)) = split_dts thy t;
   812     val ids = map (fst o dest_Free) 
   813       ((distinct o (flat o (map vars))) ts);
   814   in if (subtract op = oids ids) <> []
   815      then (("identifiers "^(strs2str' (subtract op = oids ids))^
   816 	    " not in example"), e_ori_, [])
   817      else 
   818 	 if d = e_term 
   819 	 then 
   820 	     if not (subset op = (map typeless ts, map typeless ots))
   821 	     then (("terms '"^
   822 		    ((strs2str' o (map (Syntax.string_of_term 
   823 					    (thy2ctxt thy)))) ts)^
   824 		    "' not in example (typeless)"), e_ori_, [])
   825 	     else (case seek_orits thy sel ts ori of
   826 		       ("", ori_ as (_,_,_,d,ts), all) =>
   827 		       (case test_types thy (d,ts) of
   828 			    "" => ("", ori_, all)
   829 			  | msg => (msg, e_ori_, []))
   830 		     | (msg,_,_) => (msg, e_ori_, []))
   831 	 else 
   832 	     if member op = (map #4 ori) d
   833 	     then seek_oridts thy sel (d,ts) ori
   834 	     else ((Syntax.string_of_term (thy2ctxt thy) d)^
   835 		   (*" not in example", e_ori_, []) ///11.11.03*)
   836 		   " not in example", (0,[],sel,d,ts), [])
   837   end;
   838 
   839 
   840 (*. for return-value of appl_add .*)
   841 datatype additm =
   842 	 Add of itm
   843        | Err of string;    (*error-message*)
   844 
   845 
   846 (*. add an item; check wrt. oris and pbt .*)
   847 
   848 (* in contrary to oris<>[] below, this part handles user-input
   849    extremely acceptive, i.e. accept input instead error-msg *)
   850 fun appl_add thy sel ([]:ori list) ppc pbt ct' =
   851 (* val (ppc,pbt,ct',env) = (pbl, (#ppc o get_pbt) cpI, ct, []:envv);
   852    !!!! 28.8.01: env tested _minimally_ !!!
   853    *)
   854   let 
   855     val i = 1 + (if ppc=[] then 0 else maxl (map #1 ppc));
   856   in case parse thy ct' of (*should be done in applicable_in 4.00.FIXME*)
   857     NONE => Add (i,[],false,sel,Syn ct')
   858 (* val (SOME ct) = parse thy ct';
   859    *)
   860   | SOME ct =>
   861       let
   862 	val (d,ts(*,pval*)) = split_dts thy (term_of ct);
   863       in if d = e_term 
   864 	 then Add (i,[],false,sel,Mis (dsc_unknown,hd ts(*24.3.02*)))
   865       
   866 	 else  
   867 	   (case find_first (eq1 d) pbt of
   868 	     NONE => Add (i,[],true,sel,Sup ((d,ts)))
   869 	   | SOME (f,(_,id)) =>
   870 (* val SOME (f,(_,id)) = find_first (eq1 d) pbt;
   871    *)
   872 	       let
   873 		 fun eq2 d ((i,_,_,_,itm_):itm) = 
   874 		     (d = (d_in itm_)) andalso i<>0;
   875 	       in case find_first (eq2 d) ppc of 
   876 		 NONE => Add (i,[],true,f, Cor ((d,ts), (id, (*pval*)
   877 							 pbl_ids' thy d ts)))
   878 	       | SOME (i',_,_,_,itm_) => 
   879 (* val SOME (i',_,_,_,itm_) = find_first (eq2 d) ppc;
   880    val NONE = find_first (eq2 d) ppc;
   881    *)
   882 		   if is_list_dsc d
   883 		   then let val ts = union op = ts (ts_in itm_) 
   884 			in Add (if ts_in itm_ = [] then i else i',
   885 				 [],true,f,Cor ((d, ts), (id, (*pval*)
   886 							  pbl_ids' thy d ts)))
   887 			end
   888 		   else Add (i',[],true,f,Cor ((d,ts),(id, (*pval*)
   889 						       pbl_ids' thy d ts)))
   890 	       end
   891 	   )
   892       end
   893   end
   894 (*. add ct to ppc .*)
   895 (*FIXXME: accept items as Sup, Syn here, too (like appl_add..oris=[] above)*)
   896 (* val (ppc,pbt) = (pbl, ppc);
   897    val (ppc,pbt) = (met, (#ppc o get_met) cmI);
   898 
   899    val (ppc,pbt) = (pbl, (#ppc o get_pbt) cpI);
   900    *)
   901   | appl_add thy sel oris ppc pbt(*only for upd_envv*) ct = 
   902   let
   903     val ctopt = parse thy ct;
   904   in case ctopt of
   905     NONE => Err ("syntax error in "^ct)
   906   | SOME ct =>(* val SOME ct = ctopt;
   907 		 val (msg,ori',all) = is_known thy sel oris (term_of ct);
   908 		 val (msg,itm) = is_notyet_input thy ppc all ori' pbt;
   909 		*) 
   910     (case is_known thy sel oris (term_of ct) of
   911 	 ("",ori'(*ts='ct'*), all) => 
   912 	 (case is_notyet_input thy ppc all ori' pbt of
   913 	      ("",itm)  => Add itm
   914 	    | (msg,_) => Err msg)
   915        | (msg,_,_) => Err msg)
   916   end;
   917 (* 
   918 > val (msg,itm) = is_notyet_input thy ppc all ori';
   919 val itm = (12,[3],false,"#Relate",Cor (Const #,[#,#])) : itm
   920 > val itm_ = #5 itm;
   921 > val ts = ts_in itm_;
   922 > map (atomty) ts; 
   923 *)
   924 
   925 (*---------------------------------------------(4) nach ptyps.sml 23.3.02*)
   926 
   927 
   928 (** make oris from args of the stac SubProblem and from pbt **)
   929 
   930 (*.can this formal argument (of a model-pattern) be omitted in the arg-list
   931    of a SubProblem ? see ME/ptyps.sml 'type met '.*)
   932 fun is_copy_named_idstr str =
   933     case (rev o explode) str of
   934       (*"_"::_  ::"_"::_ => true*)
   935 	"'"::"'"::"'"::_ => true
   936       | _ => false;
   937 (*> is_copy_named_idstr "v_i'''";
   938 val it = true : bool
   939   > is_copy_named_idstr "e_";
   940 val it = false : bool 
   941   > is_copy_named_idstr "L___";
   942 val it = true : bool
   943 *)
   944 (*.should this formal argument (of a model-pattern) create a new identifier?.*)
   945 fun is_copy_named_generating_idstr str =
   946     if is_copy_named_idstr str
   947     then case (rev o explode) str of
   948 	"_"::"_"::"_"::_ => false
   949       | _ => true
   950     else false;
   951 (*> is_copy_named_generating_idstr "v_i'''";
   952 val it = true : bool
   953   > is_copy_named_generating_idstr "L___";
   954 val it = false : bool
   955 *)
   956 
   957 (*.can this formal argument (of a model-pattern) be omitted in the arg-list
   958    of a SubProblem ? see ME/ptyps.sml 'type met '.*)
   959 fun is_copy_named (_,(_,t)) = (is_copy_named_idstr o free2str) t;
   960 (*.should this formal argument (of a model-pattern) create a new identifier?.*)
   961 fun is_copy_named_generating (_,(_,t)) = 
   962     (is_copy_named_generating_idstr o free2str) t;
   963 
   964 
   965 (*.split type-wrapper from scr-arg and build part of an ori;
   966    an type-error is reported immediately, raises an exn, 
   967    subsequent handling of exn provides 2nd part of error message.*)
   968 (*fun mtc thy ((str, (dsc, _)):pat) (ty $ var) =   WN100820 made cterm to term 
   969     (* val (thy, (str, (dsc, _)), (ty $ var)) =
   970 	   (thy,  p,               a);
   971        *)
   972     (cterm_of thy (dsc $ var);(*type check*)
   973      SOME ((([1], str, dsc, (*[var]*)
   974 	    split_dts' (dsc, var))): preori)(*:ori without leading #*))
   975     handle e  as TYPE _ => 
   976 	   (writeln (dashs 70^"\n"
   977 		      ^"*** ERROR while creating the items for the model of the ->problem\n"
   978 		      ^"*** from the ->stac with ->typeconstructor in arglist:\n"
   979 		      ^"*** item (->description ->value): "^term2str dsc^" "^term2str var^"\n"
   980 		      ^"*** description: "^(term_detail2str dsc)
   981 		      ^"*** value: "^(term_detail2str var)
   982 		      ^"*** typeconstructor in script: "^(term_detail2str ty)
   983 		      ^"*** checked by theory: "^(theory2str thy)^"\n"
   984 		      ^"*** "^dots 66);	     
   985 	     print_exn e; (*raises exn again*)
   986 	    NONE);*)
   987 fun mtc thy ((str, (dsc, _)):pat) (ty $ var) =
   988     (* val (thy, (str, (dsc, _)), (ty $ var)) =
   989 	   (thy,  p,               a);
   990        *)
   991     (cterm_of thy (dsc $ var);(*type check*)
   992      SOME ((([1], str, dsc, (*[var]*)
   993 	    split_dts' (dsc, var))): preori)(*:ori without leading #*))
   994     handle e  as TYPE _ => 
   995 	   (writeln (dashs 70^"\n"
   996 		      ^"*** ERROR while creating the items for the model of the ->problem\n"
   997 		      ^"*** from the ->stac with ->typeconstructor in arglist:\n"
   998 		      ^"*** item (->description ->value): "^term2str dsc^" "^term2str var^"\n"
   999 		      ^"*** description: "^(term_detail2str dsc)
  1000 		      ^"*** value: "^(term_detail2str var)
  1001 		      ^"*** typeconstructor in script: "^(term_detail2str ty)
  1002 		      ^"*** checked by theory: "^(theory2str thy)^"\n"
  1003 		      ^"*** "^dots 66);	     
  1004 	    (*WN100820 postponed: print_exn e; raises exn again*)
  1005 	    NONE);
  1006 (*> val pbt = (#ppc o get_pbt) ["univariate","equation"];
  1007 > val Const ("Script.SubProblem",_) $
  1008 	  (Const ("Pair",_) $ Free (thy', _) $
  1009 		 (Const ("Pair",_) $ pblID' $ metID')) $ ags =
  1010     str2term"(SubProblem (SqRoot_,[univariate,equation],\
  1011 	    \[SqRoot_,solve_linear]) [BOOL (x+1- 2=0), REAL x])::bool list";
  1012 > val ags = isalist2list ags;
  1013 > mtc thy (hd pbt) (hd ags);
  1014 val it = SOME ([1],"#Given",Const (#,#),[# $ #]) *)
  1015 
  1016 (*.match each pat of the model-pattern with an actual argument;
  1017    precondition: copy-named vars are filtered out.*)
  1018 fun matc thy ([]:pat list)  _  (oris:preori list) = oris
  1019   | matc thy pbt [] _ =
  1020     (writeln (dashs 70);
  1021      raise error ("actual arg(s) missing for '"^pats2str pbt
  1022 		 ^"' i.e. should be 'copy-named' by '*_._'"))
  1023   | matc thy ((p as (s,(d,t)))::pbt) (a::ags) oris =
  1024     (* val (thy, ((p as (s,(d,t)))::pbt), (a::ags), oris) =
  1025 	   (thy,  pbt',                    ags,     []);
  1026        (*recursion..*)
  1027        val (thy, ((p as (s,(d,t)))::pbt), (a::ags), oris) =
  1028 	   (thy,  pbt,                     ags,    (oris @ [ori]));
  1029        *)
  1030     (*del?..*)if (is_copy_named_idstr o free2str) t then oris
  1031     else(*..del?*) let val opt = mtc thy p a;  
  1032 	 in case opt of
  1033 		(* val SOME ori = mtc thy p a;
  1034 		   *)
  1035 		SOME ori => matc thy pbt ags (oris @ [ori])
  1036 	      | NONE => [](*WN050903 skipped by exn handled in match_ags*)
  1037 	 end; 
  1038 (* run subp-rooteq.sml until Init_Proof before ...
  1039 > val Nd (PblObj {origin=(oris,_,_),...},_) = pt;(*from test/subp-rooteq.sml*)
  1040 > fun xxxfortest (_,a,b,c,d) = (a,b,c,d);val oris = map xxxfortest oris;
  1041 
  1042  other vars as in mtc ..
  1043 > matc thy (drop_last pbt) ags [];
  1044 val it = ([[1],"#Given",Const #,[#]),(0,[#],"#Given",Const #,[#])],2)*)
  1045 
  1046 
  1047 (*WN051014 outcommented with redesign copy-named (for omitting '#Find'
  1048   in SubProblem); 
  1049   kept as initial idea for generating x_1, x_2, ... for equations*)
  1050 fun cpy_nam (pbt:pat list) (oris:preori list) (p as (field,(dsc,t)):pat) =
  1051 (* val ((pbt:pat list), (oris:preori list), ((field,(dsc,t)):pat)) =
  1052        (pbt',            oris',             hd (*!!!!!*) cy);
  1053    *)
  1054   (if is_copy_named_generating p
  1055    then (*WN051014 kept strange old code ...*)
  1056        let fun sel (_,_,d,ts) = comp_ts (d, ts) 
  1057 	   val cy' = (implode o drop_last o drop_last o explode o free2str) t
  1058 	   val ext = (last_elem o drop_last o explode o free2str) t
  1059 	   val vars' = map (free2str o snd o snd) pbt(*cpy-nam filtered_out*)
  1060 	   val vals = map sel oris
  1061 	   val cy_ext = (free2str o the) (assoc (vars'~~vals, cy'))^"_"^ext
  1062        in ([1], field, dsc, [mk_free (type_of t) cy_ext]):preori end
  1063    else ([1], field, dsc, [t])
  1064 	)
  1065   handle _ => raise error ("cpy_nam: for "^(term2str t));
  1066 
  1067 (*> val (field,(dsc,t)) = last_elem pbt;
  1068 > cpy_nam pbt (drop_last oris) (field,(dsc,t));
  1069 val it = ([1],"#Find",
  1070    Const ("Descript.solutions","bool List.list => Tools.toreall"),
  1071    [Free ("x_i","bool List.list")])                             *)
  1072 
  1073 
  1074 (*.match the actual arguments of a SubProblem with a model-pattern
  1075    and create an ori list (in root-pbl created from formalization).
  1076    expects ags:pats = 1:1, while copy-named are filtered out of pats;
  1077    copy-named pats are appended in order to get them into the model-items.*)
  1078 fun match_ags thy (pbt:pat list) ags =
  1079 (* val (thy, pbt, ags) = (thy, (#ppc o get_pbt) pI, ags);
  1080    val (thy, pbt, ags) = (thy, pats, ags);
  1081    *)
  1082     let fun flattup (i,(var,bool,str,itm_)) = (i,var,bool,str,itm_);
  1083 	val pbt' = filter_out is_copy_named pbt;
  1084 	val cy = filter is_copy_named pbt;
  1085 	val oris' = matc thy pbt' ags [];
  1086 	val cy' = map (cpy_nam pbt' oris') cy;
  1087 	val ors = add_id (oris' @ cy'); 
  1088     (*appended in order to get ^^^^^ them into the model-items*)
  1089     in (map flattup ors):ori list end;
  1090 (*vars as above ..
  1091 > match_ags thy pbt ags; 
  1092 val it =
  1093   [(1,[1],"#Given",Const ("Descript.equality","bool => Tools.una"),
  1094     [Const # $ (# $ #) $ Free (#,#)]),
  1095    (2,[1],"#Given",Const ("Descript.solveFor","RealDef.real => Tools.una"),
  1096     [Free ("x","RealDef.real")]),
  1097    (3,[1],"#Find",
  1098     Const ("Descript.solutions","bool List.list => Tools.toreall"),
  1099     [Free ("x_i","bool List.list")])] : ori list*)
  1100 
  1101 (*.report part of the error-msg which is not available in match_args.*)
  1102 fun match_ags_msg pI stac ags =
  1103     let val s = !show_types
  1104 	val _ = show_types:= true
  1105 	val pats = (#ppc o get_pbt) pI
  1106 	val msg = (dots 70^"\n"
  1107 		 ^"*** problem "^strs2str pI^" has the ...\n"
  1108 		 ^"*** model-pattern "^pats2str pats^"\n"
  1109 		 ^"*** stac   '"^term2str stac^"' has the ...\n"
  1110 		 ^"*** arg-list "^terms2str ags^"\n"
  1111 		 ^dashs 70)
  1112 	val _ = show_types:= s
  1113     in writeln msg end;
  1114 
  1115 
  1116 (*get the variables out of a pbl_; FIXME.WN.0311: is_copy_named ...obscure!!!*)
  1117 fun vars_of_pbl_ pbl_ = 
  1118     let fun var_of_pbl_ (gfr,(dsc,t)) = t
  1119     in ((map var_of_pbl_) o (filter_out is_copy_named)) pbl_ end;
  1120 fun vars_of_pbl_' pbl_ = 
  1121     let fun var_of_pbl_ (gfr,(dsc,t)) = t:term
  1122     in ((map var_of_pbl_)(* o (filter_out is_copy_named)*)) pbl_ end;
  1123 
  1124 fun overwrite_ppc thy itm ppc =
  1125   let 
  1126     fun repl ppc' (_,_,_,_,itm_) [] =
  1127       raise error ("overwrite_ppc: " ^ (itm_2str_ (thy2ctxt thy) itm_) ^ 
  1128                    " not found")
  1129       | repl ppc' itm (p::ppc) =
  1130 	if (#1 itm) = (#1 (p:itm)) then ppc' @ [itm] @ ppc
  1131 	else repl (ppc' @ [p]) itm ppc
  1132   in repl [] itm ppc end;
  1133 
  1134 (*10.3.00: insert the already compiled itm into model;
  1135    ev. filter_out  untouched (in FE: (0,...)) item related to insert-item *)
  1136 (* val ppc=pbl;
  1137    *)
  1138 fun insert_ppc thy itm ppc =
  1139     let 
  1140 	fun eq_untouched d ((0,_,_,_,itm_):itm) = (d = d_in itm_)
  1141 	  | eq_untouched _ _ = false;
  1142 	    val ppc' = 
  1143 		(
  1144 		 (*writeln("### insert_ppc: itm= "^(itm2str_ itm));*)       
  1145 		 case seek_ppc (#1 itm) ppc of
  1146 		     (* val SOME xxx = seek_ppc (#1 itm) ppc;
  1147 		        *)
  1148 		     SOME _ => (*itm updated in is_notyet_input WN.11.03*)
  1149 		     overwrite_ppc thy itm ppc
  1150 		   | NONE => (ppc @ [itm]));
  1151     in filter_out (eq_untouched ((d_in o #5) itm)) ppc' end;
  1152 
  1153 (*from Isabelle/src/Pure/library.ML, _appends_ a new element*)
  1154 fun gen_ins' eq (x, xs) = if gen_mem eq (x, xs) then xs else xs @ [x];
  1155 
  1156 fun eq_dsc ((_,_,_,_,itm_):itm, (_,_,_,_,iitm_):itm) = 
  1157     (d_in itm_) = (d_in iitm_);
  1158 (*insert_ppc = insert_ppc' for appl_add', input_icalhd 11.03,
  1159     handles superfluous items carelessly*)
  1160 fun insert_ppc' itm itms = gen_ins' eq_dsc (itm, itms);
  1161 (* val eee = op=;
  1162  > gen_ins' eee (4,[1,3,5,7]);
  1163 val it = [1, 3, 5, 7, 4] : int list*)
  1164 
  1165 
  1166 (*. output the headline to a ppc .*)
  1167 fun header p_ pI mI =
  1168     case p_ of Pbl => Problem (if pI = e_pblID then [] else pI) 
  1169 	     | Met => Method mI
  1170 	     | pos => raise error ("header called with "^ pos_2str pos);
  1171 
  1172 
  1173 
  1174 (* test-printouts ---
  1175 val _=writeln("### insert_ppc: (d,ts)="^((Syntax.string_of_term (thy2ctxt thy))(comp_dts thy(d,ts))));
  1176  val _=writeln("### insert_ppc: pts= "^
  1177 (strs2str' o map (Syntax.string_of_term (thy2ctxt thy))) pts);
  1178 
  1179 
  1180  val sel = "#Given"; val Add_Given' ct = m;
  1181 
  1182  val sel = "#Find"; val Add_Find' (ct,_) = m; 
  1183  val (p,_) = p;
  1184  val (_,_,f,nxt',_,pt')= specify_additem sel (ct,[]) (p,Pbl(*!!!!!!!*)) c pt;
  1185 --------------
  1186  val sel = "#Given"; val Add_Given' (ct,_) = nxt; val (p,_) = p;
  1187   *)
  1188 fun specify_additem sel (ct,_) (p,Met) c pt = 
  1189     let
  1190       val (PblObj{meth=met,origin=(oris,(dI',pI',mI'),_),
  1191 		  probl=pbl,spec=(dI,pI,mI),...}) = get_obj I pt p;
  1192       val thy = if dI = e_domID then assoc_thy dI' else assoc_thy dI;
  1193     (*val ppt = if pI = e_pblID then get_pbt pI' else get_pbt pI;*)
  1194       val cpI = if pI = e_pblID then pI' else pI;
  1195       val cmI = if mI = e_metID then mI' else mI;
  1196       val {ppc,pre,prls,...} = get_met cmI
  1197     in case appl_add thy sel oris met ppc ct of
  1198       Add itm (*..union old input *) =>
  1199 	let (* val Add itm = appl_add thy sel oris met (#ppc (get_met cmI)) ct;
  1200                *)
  1201 	  val met' = insert_ppc thy itm met;
  1202 	  (*val pt' = update_met pt p met';*)
  1203 	  val ((p,Met),_,_,pt') = 
  1204 	      generate1 thy (case sel of
  1205 				 "#Given" => Add_Given' (ct, met')
  1206 			       | "#Find"  => Add_Find'  (ct, met')
  1207 			       | "#Relate"=> Add_Relation'(ct, met')) 
  1208 			Uistate (p,Met) pt
  1209 	  val pre' = check_preconds thy prls pre met'
  1210 	  val pb = foldl and_ (true, map fst pre')
  1211 	  (*val _=writeln("@@@ specify_additem: Met Add before nxt_spec")*)
  1212 	  val (p_,nxt) =
  1213 	    nxt_spec Met pb oris (dI',pI',mI') (pbl,met') 
  1214 	    ((#ppc o get_pbt) cpI,ppc) (dI,pI,mI);
  1215 	in ((p,p_), ((p,p_),Uistate),
  1216 	    Form' (PpcKF (0,EdUndef,(length p),Nundef,
  1217 			  (Method cmI, itms2itemppc thy met' pre'))),
  1218 	    nxt,Safe,pt') end
  1219     | Err msg =>
  1220 	  let val pre' = check_preconds thy prls pre met
  1221 	      val pb = foldl and_ (true, map fst pre')
  1222 	    (*val _=writeln("@@@ specify_additem: Met Err before nxt_spec")*)
  1223 	      val (p_,nxt) =
  1224 	    nxt_spec Met pb oris (dI',pI',mI') (pbl,met) 
  1225 	    ((#ppc o get_pbt) cpI,(#ppc o get_met) cmI) (dI,pI,mI);
  1226 	  in ((p,p_), ((p,p_),Uistate), Error' (Error_ msg), nxt, Safe,pt) end
  1227     end
  1228 (* val (p,_) = p;
  1229    *)
  1230 | specify_additem sel (ct,_) (p,_(*Frm, Pbl*)) c pt = 
  1231     let
  1232       val (PblObj{meth=met,origin=(oris,(dI',pI',mI'),_),
  1233 		  probl=pbl,spec=(dI,pI,mI),...}) = get_obj I pt p;
  1234       val thy = if dI = e_domID then assoc_thy dI' else assoc_thy dI;
  1235       val cpI = if pI = e_pblID then pI' else pI;
  1236       val cmI = if mI = e_metID then mI' else mI;
  1237       val {ppc,where_,prls,...} = get_pbt cpI;
  1238     in case appl_add thy sel oris pbl ppc ct of
  1239       Add itm (*..union old input *) =>
  1240       (* val Add itm = appl_add thy sel oris pbl ppc ct;
  1241          *)
  1242 	let
  1243 	    (*val _= writeln("###specify_additem: itm= "^(itm2str_ itm));*)
  1244 	  val pbl' = insert_ppc thy itm pbl
  1245 	  val ((p,Pbl),_,_,pt') = 
  1246 	      generate1 thy (case sel of
  1247 				 "#Given" => Add_Given' (ct, pbl')
  1248 			       | "#Find"  => Add_Find'  (ct, pbl')
  1249 			       | "#Relate"=> Add_Relation'(ct, pbl')) 
  1250 			Uistate (p,Pbl) pt
  1251 	  val pre = check_preconds thy prls where_ pbl'
  1252 	  val pb = foldl and_ (true, map fst pre)
  1253 	(*val _=writeln("@@@ specify_additem: Pbl Add before nxt_spec")*)
  1254 	  val (p_,nxt) =
  1255 	    nxt_spec Pbl pb oris (dI',pI',mI') (pbl',met) 
  1256 		     (ppc,(#ppc o get_met) cmI) (dI,pI,mI);
  1257 	  val ppc = if p_= Pbl then pbl' else met;
  1258 	in ((p,p_), ((p,p_),Uistate),
  1259 	    Form' (PpcKF (0,EdUndef,(length p),Nundef,
  1260 			  (header p_ pI cmI,
  1261 			   itms2itemppc thy ppc pre))), nxt,Safe,pt') end
  1262 
  1263     | Err msg =>
  1264 	  let val pre = check_preconds thy prls where_ pbl
  1265 	      val pb = foldl and_ (true, map fst pre)
  1266 	    (*val _=writeln("@@@ specify_additem: Pbl Err before nxt_spec")*)
  1267 	      val (p_,nxt) =
  1268 	    nxt_spec Pbl pb oris (dI',pI',mI') (pbl,met) 
  1269 	    (ppc,(#ppc o get_met) cmI) (dI,pI,mI);
  1270 	  in ((p,p_), ((p,p_),Uistate), Error' (Error_ msg), nxt, Safe,pt) end
  1271     end;
  1272 (* val sel = "#Find"; val (p,_) = p; val Add_Find' ct = nxt;
  1273    val (_,_,f,nxt',_,pt')= specify_additem sel ct (p,Met) c pt;
  1274   *)
  1275 
  1276 (* ori
  1277 val (msg,itm) = appl_add thy sel oris ppc ct;
  1278 val (Cor(d,ts)) = #5 itm;
  1279 map (atomty) ts;
  1280 
  1281 pre
  1282 *)
  1283 
  1284 
  1285 (* val Init_Proof' (fmz,(dI',pI',mI')) = m;
  1286    specify (Init_Proof' (fmz,(dI',pI',mI'))) e_pos' [] EmptyPtree;
  1287    *)
  1288 fun specify (Init_Proof' (fmz,(dI',pI',mI'))) (_:pos') (_:cid) (_:ptree)= 
  1289   let          (* either """"""""""""""" all empty or complete *)
  1290     val thy = assoc_thy dI';
  1291     val oris = if dI' = e_domID orelse pI' = e_pblID then ([]:ori list)
  1292 	       else prep_ori fmz thy ((#ppc o get_pbt) pI');
  1293     val (pt,c) = cappend_problem e_ptree [] e_istate (fmz,(dI',pI',mI'))
  1294 				 (oris,(dI',pI',mI'),e_term);
  1295     val {ppc,prls,where_,...} = get_pbt pI'
  1296     (*val pbl = init_pbl ppc;  WN.9.03: done in Model/Refine_Problem
  1297     val pt = update_pbl pt [] pbl;
  1298     val pre = check_preconds thy prls where_ pbl
  1299     val pb = foldl and_ (true, map fst pre)*)
  1300     val (pbl, pre, pb) = ([], [], false)
  1301   in case mI' of
  1302 	 ["no_met"] => 
  1303 	 (([],Pbl), (([],Pbl),Uistate),
  1304 	  Form' (PpcKF (0,EdUndef,(length []),Nundef,
  1305 			(Problem [], itms2itemppc (assoc_thy dI') pbl pre))),
  1306 	  Refine_Tacitly pI', Safe,pt)
  1307        | _ => 
  1308 	 (([],Pbl), (([],Pbl),Uistate),
  1309 	  Form' (PpcKF (0,EdUndef,(length []),Nundef,
  1310 			(Problem [], itms2itemppc (assoc_thy dI') pbl pre))),
  1311 	  Model_Problem,
  1312 	  Safe,pt)
  1313   end
  1314   (*ONLY for STARTING modeling phase*)
  1315   | specify (Model_Problem' (_,pbl,met)) (pos as (p,p_)) c pt =
  1316   let (* val (Model_Problem' (_,pbl), pos as (p,p_)) = (m, (p,p_));
  1317          *)
  1318     val (PblObj{origin=(oris,(dI',pI',mI'),_), spec=(dI,_,_),...}) = 
  1319 	get_obj I pt p
  1320     val thy' = if dI = e_domID then dI' else dI
  1321     val thy = assoc_thy thy'
  1322     val {ppc,prls,where_,...} = get_pbt pI'
  1323     val pre = check_preconds thy prls where_ pbl
  1324     val pb = foldl and_ (true, map fst pre)
  1325     val ((p,_),_,_,pt) = 
  1326 	generate1 thy (Model_Problem'([],pbl,met)) Uistate pos pt
  1327     val (_,nxt) = nxt_spec Pbl pb oris (dI',pI',mI') (pbl,met) 
  1328 		(ppc,(#ppc o get_met) mI') (dI',pI',mI');
  1329   in ((p,Pbl), ((p,p_),Uistate),
  1330       Form' (PpcKF (0,EdUndef,(length p),Nundef,
  1331 		    (Problem pI', itms2itemppc (assoc_thy dI') pbl pre))),
  1332       nxt, Safe, pt) end
  1333 
  1334 (*. called only if no_met is specified .*)     
  1335   | specify (Refine_Tacitly' (pI,pIre,_,_,_)) (pos as (p,_)) c pt =
  1336   let (* val Refine_Tacitly' (pI,pIre,_,_,_) = m;
  1337          *)
  1338     val (PblObj{origin=(oris,(dI',pI',mI'),_), meth=met, ...}) = 
  1339 	get_obj I pt p;
  1340     val {prls,met,ppc,thy,where_,...} = get_pbt pIre
  1341     (*val pbl = init_pbl ppc --- Model_Problem recognizes probl=[]*)
  1342     (*val pt = update_pbl pt p pbl;
  1343     val pt = update_orispec pt p 
  1344 		(string_of_thy thy, pIre, 
  1345 		 if length met = 0 then e_metID else hd met);*)
  1346     val (domID, metID) = (string_of_thy thy, 
  1347 		      if length met = 0 then e_metID else hd met)
  1348     val ((p,_),_,_,pt) = 
  1349 	generate1 thy (Refine_Tacitly'(pI,pIre,domID,metID,(*pbl*)[])) 
  1350 		  Uistate pos pt
  1351     (*val pre = check_preconds thy prls where_ pbl
  1352     val pb = foldl and_ (true, map fst pre)*)
  1353     val (pbl, pre, pb) = ([], [], false)
  1354   in ((p,Pbl), (pos,Uistate),
  1355       Form' (PpcKF (0,EdUndef,(length p),Nundef,
  1356 		    (Problem pIre, itms2itemppc (assoc_thy dI') pbl pre))),
  1357       Model_Problem, Safe, pt) end
  1358 
  1359   | specify (Refine_Problem' (rfd as (pI,_))) pos c pt =
  1360     let val (pos,_,_,pt) = generate1 (assoc_thy "Isac.thy") 
  1361 				     (Refine_Problem' rfd) Uistate pos pt
  1362     in (pos(*p,Pbl*), (pos(*p,Pbl*),Uistate), Problems (RefinedKF rfd), 
  1363 	Model_Problem, Safe, pt) end
  1364 
  1365 (* val (Specify_Problem' (pI, (ok, (itms, pre)))) = nxt; val (p,_) = p;
  1366    val (Specify_Problem' (pI, (ok, (itms, pre)))) = m; val (p,_) = p;
  1367    *)
  1368   | specify (Specify_Problem' (pI, (ok, (itms, pre)))) (pos as (p,_)) c pt =
  1369   let val (PblObj {origin=(oris,(dI',pI',mI'),_), spec=(dI,_,mI), 
  1370 		   meth=met, ...}) = get_obj I pt p;
  1371     (*val pt = update_pbl pt p itms;
  1372     val pt = update_pblID pt p pI;*)
  1373     val thy = assoc_thy dI
  1374     val ((p,Pbl),_,_,pt)= 
  1375 	generate1 thy (Specify_Problem' (pI, (ok, (itms, pre)))) Uistate pos pt
  1376     val dI'' = assoc_thy (if dI=e_domID then dI' else dI);
  1377     val mI'' = if mI=e_metID then mI' else mI;
  1378   (*val _=writeln("@@@ specify (Specify_Problem) before nxt_spec")*)
  1379     val (_,nxt) = nxt_spec Pbl ok oris (dI',pI',mI') (itms, met) 
  1380 		((#ppc o get_pbt) pI,(#ppc o get_met) mI'') (dI,pI,mI);
  1381   in ((p,Pbl), (pos,Uistate),
  1382       Form' (PpcKF (0,EdUndef,(length p),Nundef,
  1383 		    (Problem pI, itms2itemppc dI'' itms pre))),
  1384       nxt, Safe, pt) end    
  1385 (* val Specify_Method' mID = nxt; val (p,_) = p;
  1386    val Specify_Method' mID = m;
  1387    specify (Specify_Method' mID) (p,p_) c pt;
  1388    *)
  1389   | specify (Specify_Method' (mID,_,_)) (pos as (p,_)) c pt =
  1390   let val (PblObj {origin=(oris,(dI',pI',mI'),_), probl=pbl, spec=(dI,pI,mI), 
  1391 		   meth=met, ...}) = get_obj I pt p;
  1392     val {ppc,pre,prls,...} = get_met mID
  1393     val thy = assoc_thy dI
  1394     val oris = add_field' thy ppc oris;
  1395     (*val pt = update_oris pt p oris; 20.3.02: repl. "#undef"*)
  1396     val dI'' = if dI=e_domID then dI' else dI;
  1397     val pI'' = if pI = e_pblID then pI' else pI;
  1398     val met = if met=[] then pbl else met;
  1399     val (ok, (itms, pre')) = match_itms_oris thy met (ppc,pre,prls ) oris;
  1400     (*val pt = update_met pt p itms;
  1401     val pt = update_metID pt p mID*)
  1402     val (pos,_,_,pt)= 
  1403 	generate1 thy (Specify_Method' (mID, oris, itms)) Uistate pos pt
  1404     (*val _=writeln("@@@ specify (Specify_Method) before nxt_spec")*)
  1405     val (_,nxt) = nxt_spec Met (*ok*)true oris (dI',pI',mI') (pbl, itms) 
  1406 		((#ppc o get_pbt) pI'',ppc) (dI'',pI'',mID);
  1407   in (pos, (pos,Uistate),
  1408       Form' (PpcKF (0,EdUndef,(length p),Nundef,
  1409 		    (Method mID, itms2itemppc (assoc_thy dI'') itms pre'))),
  1410       nxt, Safe, pt) end    
  1411 (* val Add_Find' ct = nxt; val sel = "#Find"; 
  1412    *)
  1413   | specify (Add_Given' ct) p c pt = specify_additem "#Given" ct p c pt
  1414   | specify (Add_Find'  ct) p c pt = specify_additem "#Find"  ct p c pt
  1415   | specify (Add_Relation' ct) p c pt=specify_additem"#Relate"ct p c pt
  1416 (* val Specify_Theory' domID = m;
  1417    val (Specify_Theory' domID, (p,p_)) = (m, pos);
  1418    *)
  1419   | specify (Specify_Theory' domID) (pos as (p,p_)) c pt =
  1420     let val p_ = case p_ of Met => Met | _ => Pbl
  1421       val thy = assoc_thy domID;
  1422       val (PblObj{origin=(oris,(dI',pI',mI'),_), meth=met,
  1423 		  probl=pbl, spec=(dI,pI,mI),...}) = get_obj I pt p;
  1424       val mppc = case p_ of Met => met | _ => pbl;
  1425       val cpI = if pI = e_pblID then pI' else pI;
  1426       val {prls=per,ppc,where_=pwh,...} = get_pbt cpI
  1427       val cmI = if mI = e_metID then mI' else mI;
  1428       val {prls=mer,ppc=mpc,pre=mwh,...} = get_met cmI
  1429       val pre = 
  1430 	  case p_ of
  1431 	      Met => (check_preconds thy mer mwh met)
  1432 	    | _ => (check_preconds thy per pwh pbl)
  1433       val pb = foldl and_ (true, map fst pre)
  1434     in if domID = dI
  1435        then let 
  1436 	 (*val _=writeln("@@@ specify (Specify_Theory) THEN before nxt_spec")*)
  1437            val (p_,nxt) = nxt_spec p_ pb oris (dI',pI',mI') 
  1438 				   (pbl,met) (ppc,mpc) (dI,pI,mI);
  1439 	      in ((p,p_), (pos,Uistate), 
  1440 		  Form'(PpcKF (0,EdUndef,(length p), Nundef,
  1441 			       (header p_ pI cmI, itms2itemppc thy mppc pre))),
  1442 		  nxt,Safe,pt) end
  1443        else (*FIXME: check ppc wrt. (new!) domID ..? still parsable?*)
  1444 	 let 
  1445 	   (*val pt = update_domID pt p domID;11.8.03*)
  1446 	   val ((p,p_),_,_,pt) = generate1 thy (Specify_Theory' domID) 
  1447 					   Uistate (p,p_) pt
  1448 	 (*val _=writeln("@@@ specify (Specify_Theory) ELSE before nxt_spec")*)
  1449 	   val (p_,nxt) = nxt_spec p_ pb oris (dI',pI',mI') (pbl,met) 
  1450 				   (ppc,mpc) (domID,pI,mI);
  1451 	 in ((p,p_), (pos,Uistate), 
  1452 	     Form' (PpcKF (0, EdUndef, (length p),Nundef,
  1453 			   (header p_ pI cmI, itms2itemppc thy mppc pre))),
  1454 	     nxt, Safe,pt) end
  1455     end
  1456 (* itms2itemppc thy [](*mpc*) pre
  1457    *)
  1458   | specify m' _ _ _ = 
  1459     raise error ("specify: not impl. for "^tac_2str m');
  1460 
  1461 (* val (sel, Add_Given ct, ptp as (pt,(p,Pbl))) = ("#Given", tac, ptp);
  1462    val (sel, Add_Find  ct, ptp as (pt,(p,Pbl))) = ("#Find", tac, ptp);
  1463    *)
  1464 fun nxt_specif_additem sel ct (ptp as (pt,(p,Pbl))) = 
  1465     let
  1466       val (PblObj{meth=met,origin=(oris,(dI',pI',_),_),
  1467 		  probl=pbl,spec=(dI,pI,_),...}) = get_obj I pt p;
  1468       val thy = if dI = e_domID then assoc_thy dI' else assoc_thy dI;
  1469       val cpI = if pI = e_pblID then pI' else pI;
  1470     in case appl_add thy sel oris pbl ((#ppc o get_pbt) cpI) ct of
  1471 	   Add itm (*..union old input *) =>
  1472 (* val Add itm = appl_add thy sel oris pbl ppc ct;
  1473    *)
  1474 	   let
  1475 	       (*val _=writeln("###nxt_specif_additem: itm= "^(itm2str_ itm));*)
  1476 	       val pbl' = insert_ppc thy itm pbl
  1477 	       val (tac,tac_) = 
  1478 		   case sel of
  1479 		       "#Given" => (Add_Given    ct, Add_Given'   (ct, pbl'))
  1480 		     | "#Find"  => (Add_Find     ct, Add_Find'    (ct, pbl'))
  1481 		     | "#Relate"=> (Add_Relation ct, Add_Relation'(ct, pbl'))
  1482 	       val ((p,Pbl),c,_,pt') = 
  1483 		   generate1 thy tac_ Uistate (p,Pbl) pt
  1484 	   in ([(tac,tac_,((p,Pbl),Uistate))], c, (pt',(p,Pbl))):calcstate' end
  1485 	       
  1486 	 | Err msg => 
  1487 	   (*TODO.WN03 pass error-msgs to the frontend..
  1488              FIXME ..and dont abuse a tactic for that purpose*)
  1489 	   ([(Tac msg,
  1490 	      Tac_ (theory "Pure", msg,msg,msg),
  1491 	      (e_pos', e_istate))], [], ptp) 
  1492     end
  1493 
  1494 (* val sel = "#Find"; val (p,_) = p; val Add_Find' ct = nxt;
  1495    val (_,_,f,nxt',_,pt')= nxt_specif_additem sel ct (p,Met) c pt;
  1496   *)
  1497   | nxt_specif_additem sel ct (ptp as (pt,(p,Met))) = 
  1498     let
  1499       val (PblObj{meth=met,origin=(oris,(dI',pI',mI'),_),
  1500 		  probl=pbl,spec=(dI,pI,mI),...}) = get_obj I pt p;
  1501       val thy = if dI = e_domID then assoc_thy dI' else assoc_thy dI;
  1502       val cmI = if mI = e_metID then mI' else mI;
  1503     in case appl_add thy sel oris met ((#ppc o get_met) cmI) ct of
  1504       Add itm (*..union old input *) =>
  1505 	let (* val Add itm = appl_add thy sel oris met (#ppc (get_met cmI)) ct;
  1506                *)
  1507 	  val met' = insert_ppc thy itm met;
  1508 	  val (tac,tac_) = 
  1509 	      case sel of
  1510 		  "#Given" => (Add_Given    ct, Add_Given'   (ct, met'))
  1511 		| "#Find"  => (Add_Find     ct, Add_Find'    (ct, met'))
  1512 		| "#Relate"=> (Add_Relation ct, Add_Relation'(ct, met'))
  1513 	  val ((p,Met),c,_,pt') = 
  1514 	      generate1 thy tac_ Uistate (p,Met) pt
  1515 	in ([(tac,tac_,((p,Met), Uistate))], c, (pt',(p,Met))) end
  1516 
  1517     | Err msg => ([(*tacis*)], [], ptp) 
  1518     (*nxt_me collects tacis until not hide; here just no progress*)
  1519     end;
  1520 
  1521 (* ori
  1522 val (msg,itm) = appl_add thy sel oris ppc ct;
  1523 val (Cor(d,ts)) = #5 itm;
  1524 map (atomty) ts;
  1525 
  1526 pre
  1527 *)
  1528 fun ori2Coritm pbt ((i,v,f,d,ts):ori) =
  1529     (i,v,true,f, Cor ((d,ts),(((snd o snd o the o (find_first (eq1 d))) pbt) 
  1530 			      handle _ => raise error ("ori2Coritm: dsc "^
  1531 						term2str d^
  1532 						"in ori, but not in pbt")
  1533 			      ,ts))):itm;
  1534 fun ori2Coritm (pbt:pat list) ((i,v,f,d,ts):ori) =
  1535     ((i,v,true,f, Cor ((d,ts),((snd o snd o the o 
  1536 			       (find_first (eq1 d))) pbt,ts))):itm)
  1537     handle _ => (*dsc in oris, but not in pbl pat list: keep this dsc*)
  1538     ((i,v,true,f, Cor ((d,ts),(d,ts))):itm);
  1539 
  1540 
  1541 (*filter out oris which have same description in itms*)
  1542 fun filter_outs oris [] = oris
  1543   | filter_outs oris (i::itms) = 
  1544     let val ors = filter_out ((curry op= ((d_in o #5) (i:itm))) o 
  1545 			      (#4:ori -> term)) oris;
  1546     in filter_outs ors itms end;
  1547 
  1548 fun memI a b = member op = a b;
  1549 (*filter oris which are in pbt, too*)
  1550 fun filter_pbt oris pbt =
  1551     let val dscs = map (fst o snd) pbt
  1552     in filter ((memI dscs) o (#4: ori -> term)) oris end;
  1553 
  1554 (*.combine itms from pbl + met and complete them wrt. pbt.*)
  1555 (*FIXXXME.WN031205 complete_metitms doesnt handle incorrect itms !*)
  1556 local infix mem;
  1557 fun x mem [] = false
  1558   | x mem (y :: ys) = x = y orelse x mem ys;
  1559 in 
  1560 fun complete_metitms (oris:ori list) (pits:itm list) (mits:itm list) met = 
  1561 (* val met = (#ppc o get_met) ["DiffApp","max_by_calculus"];
  1562    *)
  1563     let val vat = max_vt pits;
  1564         val itms = pits @ 
  1565 		   (filter ((curry (op mem) vat) o (#2:itm -> int list)) mits);
  1566 	val ors = filter ((curry (op mem) vat) o (#2:ori -> int list)) oris;
  1567         val os = filter_outs ors itms;
  1568     (*WN.12.03?: does _NOT_ add itms from met ?!*)
  1569     in itms @ (map (ori2Coritm met) os) end
  1570 end;
  1571 
  1572 
  1573 
  1574 (*.complete model and guard of a calc-head .*)
  1575 local infix mem;
  1576 fun x mem [] = false
  1577   | x mem (y :: ys) = x = y orelse x mem ys;
  1578 in 
  1579 fun complete_mod_ (oris, mpc, ppc, probl) =
  1580     let	val pits = filter_out ((curry op= false) o (#3: itm -> bool)) probl
  1581 	val vat = if probl = [] then 1 else max_vt probl
  1582 	val pors = filter ((curry (op mem) vat) o (#2:ori -> int list)) oris
  1583 	val pors = filter_outs pors pits (*which are in pbl already*)
  1584         val pors = (filter_pbt pors ppc) (*which are in pbt, too*)
  1585 
  1586 	val pits = pits @ (map (ori2Coritm ppc) pors)
  1587 	val mits = complete_metitms oris pits [] mpc
  1588     in (pits, mits) end
  1589 end;
  1590 
  1591 fun some_spec ((odI, opI, omI):spec) ((dI, pI, mI):spec) =
  1592     (if dI = e_domID then odI else dI,
  1593      if pI = e_pblID then opI else pI,
  1594      if mI = e_metID then omI else mI):spec;
  1595 
  1596 
  1597 (*.find a next applicable tac (for calcstate) and update ptree
  1598  (for ev. finding several more tacs due to hide).*)
  1599 (*FIXXXME: unify ... fun nxt_specif = nxt_spec + applicable_in + specify !!*)
  1600 (*WN.24.10.03        ~~~~~~~~~~~~~~   -> tac     -> tac_      -> -"- as arg*)
  1601 (*WN.24.10.03        fun nxt_solv   = ...................................??*)
  1602 fun nxt_specif (tac as Model_Problem) (pt, pos as (p,p_)) =
  1603   let
  1604     val (PblObj{origin=(oris,ospec,_),probl,spec,...}) = get_obj I pt p
  1605     val (dI,pI,mI) = some_spec ospec spec
  1606     val thy = assoc_thy dI
  1607     val mpc = (#ppc o get_met) mI (*just for reuse complete_mod_*)
  1608     val {cas,ppc,...} = get_pbt pI
  1609     val pbl = init_pbl ppc (*fill in descriptions*)
  1610     (*--------------if you think, this should be done by the Dialog 
  1611      in the java front-end, search there for WN060225-modelProblem----*)
  1612     val (pbl,met) = case cas of NONE => (pbl,[])
  1613 			    | _ => complete_mod_ (oris, mpc, ppc, probl)
  1614     (*----------------------------------------------------------------*)
  1615     val tac_ = Model_Problem' (pI, pbl, met)
  1616     val (pos,c,_,pt) = generate1 thy tac_ Uistate pos pt
  1617   in ([(tac,tac_, (pos, Uistate))], c, (pt,pos)):calcstate' end
  1618 
  1619 (* val Add_Find ct = tac;
  1620    *)
  1621   | nxt_specif (Add_Given ct) ptp = nxt_specif_additem "#Given" ct ptp
  1622   | nxt_specif (Add_Find  ct) ptp = nxt_specif_additem "#Find"  ct ptp
  1623   | nxt_specif (Add_Relation ct) ptp = nxt_specif_additem"#Relate" ct ptp
  1624 
  1625 (*. called only if no_met is specified .*)     
  1626   | nxt_specif (Refine_Tacitly pI) (ptp as (pt, pos as (p,_))) =
  1627     let val (PblObj {origin = (oris, (dI,_,_),_), ...}) = get_obj I pt p
  1628 	val opt = refine_ori oris pI
  1629     in case opt of
  1630 	   SOME pI' => 
  1631 	   let val {met,ppc,...} = get_pbt pI'
  1632 	       val pbl = init_pbl ppc
  1633 	       (*val pt = update_pbl pt p pbl ..done by Model_Problem*)
  1634 	       val mI = if length met = 0 then e_metID else hd met
  1635                val thy = assoc_thy dI
  1636 	       val (pos,c,_,pt) = 
  1637 		   generate1 thy (Refine_Tacitly' (pI,pI',dI,mI,(*pbl*)[])) 
  1638 			     Uistate pos pt
  1639 	   in ([(Refine_Tacitly pI, Refine_Tacitly' (pI,pI',dI,mI,(*pbl*)[]),
  1640 		 (pos, Uistate))], c, (pt,pos)) end
  1641 	 | NONE => ([], [], ptp)
  1642     end
  1643 
  1644   | nxt_specif (Refine_Problem pI) (ptp as (pt, pos as (p,_))) =
  1645     let val (PblObj {origin=(_,(dI,_,_),_),spec=(dI',_,_),
  1646 		     probl, ...}) = get_obj I pt p
  1647 	val thy = if dI' = e_domID then dI else dI'
  1648     in case refine_pbl (assoc_thy thy) pI probl of
  1649 	   NONE => ([], [], ptp)
  1650 	 | SOME (rfd as (pI',_)) => 
  1651 	   let val (pos,c,_,pt) = 
  1652 		   generate1 (assoc_thy thy) 
  1653 			     (Refine_Problem' rfd) Uistate pos pt
  1654 	    in ([(Refine_Problem pI, Refine_Problem' rfd,
  1655 			    (pos, Uistate))], c, (pt,pos)) end
  1656     end
  1657 
  1658   | nxt_specif (Specify_Problem pI) (pt, pos as (p,_)) =
  1659     let val (PblObj {origin=(oris,(dI,_,_),_),spec=(dI',pI',_),
  1660 		     probl, ...}) = get_obj I pt p;
  1661 	val thy = assoc_thy (if dI' = e_domID then dI else dI');
  1662         val {ppc,where_,prls,...} = get_pbt pI
  1663 	val pbl as (_,(itms,_)) = 
  1664 	    if pI'=e_pblID andalso pI=e_pblID
  1665 	    then (false, (init_pbl ppc, []))
  1666 	    else match_itms_oris thy probl (ppc,where_,prls) oris(*FIXXXXXME?*)
  1667 	(*FIXXXME~~~~~~~~~~~~~~~: take pbl and compare with new pI WN.8.03*)
  1668 	val ((p,Pbl),c,_,pt)= 
  1669 	    generate1 thy (Specify_Problem' (pI, pbl)) Uistate pos pt
  1670     in ([(Specify_Problem pI, Specify_Problem' (pI, pbl),
  1671 		    (pos,Uistate))], c, (pt,pos)) end
  1672 
  1673   (*transfers oris (not required in pbl) to met-model for script-env
  1674     FIXME.WN.8.03: application of several mIDs to SAME model?*)
  1675   | nxt_specif (Specify_Method mID) (ptp as (pt, pos as (p,_))) = 
  1676   let val (PblObj {origin=(oris,(dI',pI',mI'),_), probl=pbl, spec=(dI,pI,mI), 
  1677 		   meth=met, ...}) = get_obj I pt p;
  1678     val {ppc,pre,prls,...} = get_met mID
  1679     val thy = assoc_thy dI
  1680     val oris = add_field' thy ppc oris;
  1681     val dI'' = if dI=e_domID then dI' else dI;
  1682     val pI'' = if pI = e_pblID then pI' else pI;
  1683     val met = if met=[] then pbl else met;(*WN0602 what if more itms in met?*)
  1684     val (ok, (itms, pre')) = match_itms_oris thy met (ppc,pre,prls ) oris;
  1685     val (pos,c,_,pt)= 
  1686 	generate1 thy (Specify_Method' (mID, oris, itms)) Uistate pos pt
  1687   in ([(Specify_Method mID, Specify_Method' (mID, oris, itms),
  1688 		  (pos,Uistate))], c, (pt,pos)) end    
  1689 
  1690   | nxt_specif (Specify_Theory dI) (pt, pos as (p,Pbl)) =
  1691     let val (dI',_,_) = get_obj g_spec pt p
  1692 	val (pos,c,_,pt) = 
  1693 	    generate1 (assoc_thy "Isac.thy") (Specify_Theory' dI) 
  1694 		      Uistate pos pt
  1695     in  (*FIXXXME: check if pbl can still be parsed*)
  1696 	([(Specify_Theory dI, Specify_Theory' dI, (pos,Uistate))], c,
  1697 	 (pt, pos)) end
  1698 
  1699   | nxt_specif (Specify_Theory dI) (pt, pos as (p,Met)) =
  1700     let val (dI',_,_) = get_obj g_spec pt p
  1701 	val (pos,c,_,pt) = 
  1702 	    generate1 (assoc_thy "Isac.thy") (Specify_Theory' dI) 
  1703 		      Uistate pos pt
  1704     in  (*FIXXXME: check if met can still be parsed*)
  1705 	([(Specify_Theory dI, Specify_Theory' dI, (pos,Uistate))], c,
  1706 	 (pt, pos)) end
  1707 
  1708   | nxt_specif m' _ = 
  1709     raise error ("nxt_specif: not impl. for "^tac2str m');
  1710 
  1711 (*.get the values from oris; handle the term list w.r.t. penv.*)
  1712 
  1713 local infix mem;
  1714 fun x mem [] = false
  1715   | x mem (y :: ys) = x = y orelse x mem ys;
  1716 in 
  1717 fun vals_of_oris oris =
  1718     ((map (mkval' o (#5:ori -> term list))) o 
  1719      (filter ((curry (op mem) 1) o (#2:ori -> int list)))) oris
  1720 end;
  1721 
  1722 
  1723 
  1724 (*.create a calc-tree with oris via an cas.refined pbl.*)
  1725 fun nxt_specify_init_calc (([],(dI,pI,mI)): fmz) =
  1726 (* val ([],(dI,pI,mI)) = (fmz, sp);
  1727    *)
  1728     if pI <> [] then (*comes from pbl-browser*)
  1729 	let val {cas,met,ppc,thy,...} = get_pbt pI
  1730 	    val dI = if dI = "" then theory2theory' thy else dI
  1731 	    val thy = assoc_thy dI
  1732 	    val mI = if mI = [] then hd met else mI
  1733 	    val hdl = case cas of NONE => pblterm dI pI | SOME t => t
  1734 	    val (pt,_) = cappend_problem e_ptree [] e_istate ([], (dI,pI,mI))
  1735 					 ([], (dI,pI,mI), hdl)
  1736 	    val pt = update_spec pt [] (dI,pI,mI)
  1737 	    val pits = init_pbl' ppc
  1738 	    val pt = update_pbl pt [] pits
  1739 	in ((pt,([],Pbl)), []): calcstate end
  1740     else if mI <> [] then (*comes from met-browser*)
  1741 	let val {ppc,...} = get_met mI
  1742 	    val dI = if dI = "" then "Isac.thy" else dI
  1743 	    val thy = assoc_thy dI
  1744 	    val (pt,_) = cappend_problem e_ptree [] e_istate ([], (dI,pI,mI))
  1745 					 ([], (dI,pI,mI), e_term(*FIXME met*))
  1746 	    val pt = update_spec pt [] (dI,pI,mI)
  1747 	    val mits = init_pbl' ppc
  1748 	    val pt = update_met pt [] mits
  1749 	in ((pt,([],Met)), []) end
  1750     else (*completely new example*)
  1751 	let val (pt,_) = cappend_problem e_ptree [] e_istate ([], e_spec)
  1752 					 ([], e_spec, e_term)
  1753 	in ((pt,([],Pbl)), []) end
  1754 (* val (fmz, (dI,pI,mI)) = (fmz, sp);
  1755    *)
  1756   | nxt_specify_init_calc (fmz:fmz_,(dI,pI,mI):spec) = 
  1757     let            (* either """"""""""""""" all empty or complete *)
  1758 	val thy = assoc_thy dI
  1759 	val (pI, pors, mI) = 
  1760 	    if mI = ["no_met"] 
  1761 	    then let val pors = prep_ori fmz thy ((#ppc o get_pbt) pI)
  1762 		     val pI' = refine_ori' pors pI;
  1763 		 in (pI', pors (*refinement over models with diff.prec only*), 
  1764 		     (hd o #met o get_pbt) pI') end
  1765 	    else (pI, prep_ori fmz thy ((#ppc o get_pbt) pI), mI)
  1766 	val {cas,ppc,thy=thy',...} = get_pbt pI (*take dI from _refined_ pbl*)
  1767 	val dI = theory2theory' (maxthy thy thy');
  1768 	val hdl = case cas of
  1769 		      NONE => pblterm dI pI
  1770 		    | SOME t => subst_atomic ((vars_of_pbl_' ppc) 
  1771 						  ~~~ vals_of_oris pors) t
  1772     val (pt,_) = cappend_problem e_ptree [] e_istate (fmz,(dI,pI,mI))
  1773 				 (pors,(dI,pI,mI),hdl)
  1774     (*val pbl = init_pbl ppc  WN.9.03: done by Model/Refine_Problem
  1775     val pt = update_pbl pt [] pbl*)
  1776   in ((pt,([],Pbl)), fst3 (nxt_specif Model_Problem (pt, ([],Pbl))))
  1777   end;
  1778 
  1779 
  1780 
  1781 (*18.12.99*)
  1782 fun get_spec_form (m:tac_) ((p,p_):pos') (pt:ptree) = 
  1783 (*  case appl_spec p pt m of           /// 19.1.00
  1784     Notappl e => Error' (Error_ e)
  1785   | Appl => 
  1786 *)    let val (_,_,f,_,_,_) = specify m (p,p_) [] pt
  1787       in f end;
  1788 
  1789 
  1790 (*fun tag_form thy (formal, given) = cterm_of thy
  1791 	      (((head_of o term_of) given) $ (term_of formal)); WN100819*)
  1792 fun tag_form thy (formal, given) =
  1793     (let val gf = (head_of given) $ formal;
  1794          val _ = cterm_of thy gf
  1795      in gf end)
  1796     handle _ => raise error ("calchead.tag_form: " ^ 
  1797                              Syntax.string_of_term (thy2ctxt thy) given ^
  1798                              " .. " ^
  1799                              Syntax.string_of_term (thy2ctxt thy) formal ^
  1800                          " ..types do not match");
  1801 (* val formal = (the o (parse thy)) "[R::real]";
  1802 > val given = (the o (parse thy)) "fixed_values (cs::real list)";
  1803 > tag_form thy (formal, given);
  1804 val it = "fixed_values [R]" : cterm
  1805 *)
  1806 fun chktyp thy (n, fs, gs) = 
  1807   ((writeln o (Syntax.string_of_term (thy2ctxt thy)) o (nth n)) fs;
  1808    (writeln o (Syntax.string_of_term (thy2ctxt thy)) o (nth n)) gs;
  1809    tag_form thy (nth n fs, nth n gs));
  1810 
  1811 fun chktyps thy (fs, gs) = map (tag_form thy) (fs ~~ gs);
  1812 
  1813 (* #####################################################
  1814    find the failing item:
  1815 > val n = 2;
  1816 > val tag__form = chktyp (n,formals,givens);
  1817 > (type_of o term_of o (nth n)) formals; 
  1818 > (type_of o term_of o (nth n)) givens;
  1819 > atomty ((term_of o (nth n)) formals);
  1820 > atomty ((term_of o (nth n)) givens);
  1821 > atomty (term_of tag__form);
  1822 > use_thy"isa-98-1-HOL-plus/knowl-base/DiffAppl";
  1823  ##################################################### *)
  1824 
  1825 (* #####################################################
  1826    testdata setup
  1827 val origin = ["sqrt(9+4*x)=sqrt x + sqrt(5+x)","x::rat","(+0)"];
  1828 val formals = map (the o (parse thy)) origin;
  1829 
  1830 val given  = ["equation (lhs=rhs)",
  1831 	     "bound_variable bdv",   (* TODO type *) 
  1832 	     "error_bound apx"];
  1833 val where_ = ["e is_root_equation_in bdv",
  1834 	      "bdv is_var",
  1835 	      "apx is_const_expr"];
  1836 val find   = ["L::rat set"];
  1837 val with_  = ["L = {bdv. || ((%x. lhs) bdv) - ((%x. rhs) bdv) || < apx}"];
  1838 val chkpbl = map (the o (parse thy)) (given @ where_ @ find @ with_);
  1839 val givens = map (the o (parse thy)) given;
  1840 
  1841 val tag__forms = chktyps (formals, givens);
  1842 map ((atomty) o term_of) tag__forms;
  1843  ##################################################### *)
  1844 
  1845 
  1846 (* check pbltypes, announces one failure a time *)
  1847 (*fun chk_vars ctppc = 
  1848   let val {Given=gi,Where=wh,Find=fi,With=wi,Relate=re} = 
  1849     appc flat (mappc (vars o term_of) ctppc)
  1850   in if (wh\\gi) <> [] then ("wh\\gi",wh\\gi)
  1851      else if (re\\(gi union fi)) <> [] 
  1852 	    then ("re\\(gi union fi)",re\\(gi union fi))
  1853 	  else ("ok",[]) end;*)
  1854 fun chk_vars ctppc = 
  1855   let val {Given=gi,Where=wh,Find=fi,With=wi,Relate=re} = 
  1856           appc flat (mappc vars ctppc)
  1857       val chked = subtract op = gi wh
  1858   in if chked <> [] then ("wh\\gi", chked)
  1859      else let val chked = subtract op = (union op = gi fi) re
  1860           in if chked  <> []
  1861 	     then ("re\\(gi union fi)", chked)
  1862 	     else ("ok", []) 
  1863           end
  1864   end;
  1865 
  1866 (* check a new pbltype: variables (Free) unbound by given, find*) 
  1867 fun unbound_ppc ctppc =
  1868   let val {Given=gi,Find=fi,Relate=re,...} = 
  1869     appc flat (mappc vars ctppc)
  1870   in distinct (*re\\(gi union fi)*) 
  1871               (subtract op = (union op = gi fi) re) end;
  1872 (*
  1873 > val org = {Given=["[R=(R::real)]"],Where=[],
  1874 	   Find=["[A::real]"],With=[],
  1875 	   Relate=["[A=#2*a*b - a^^^#2, (a//#2)^^^#2 + (b//#2)^^^#2 = R^^^#2]"]
  1876 	   }:string ppc;
  1877 > val ctppc = mappc (the o (parse thy)) org;
  1878 > unbound_ppc ctppc;
  1879 val it = [("a","RealDef.real"),("b","RealDef.real")] : (string * typ) list
  1880 *)
  1881 
  1882 
  1883 (* f, a binary operator, is nested rightassociative *)
  1884 fun foldr1 f xs =
  1885   let
  1886     fun fld f (x::[]) = x
  1887       | fld f (x::x'::[]) = f (x',x)
  1888       | fld f (x::x'::xs) = f (fld f (x'::xs),x);
  1889   in ((fld f) o rev) xs end;
  1890 (*
  1891 > val (SOME ct) = parse thy "[a=b,c=d,e=f]";
  1892 > val ces = map (cterm_of thy) (isalist2list (term_of ct));
  1893 > val conj = foldr1 HOLogic.mk_conj (isalist2list (term_of ct));
  1894 > cterm_of thy conj;
  1895 val it = "(a = b & c = d) & e = f" : cterm
  1896 *)
  1897 
  1898 (* f, a binary operator, is nested leftassociative *)
  1899 fun foldl1 f (x::[]) = x
  1900   | foldl1 f (x::x'::[]) = f (x,x')
  1901   | foldl1 f (x::x'::xs) = f (x,foldl1 f (x'::xs));
  1902 (*
  1903 > val (SOME ct) = parse thy "[a=b,c=d,e=f,g=h]";
  1904 > val ces = map (cterm_of thy) (isalist2list (term_of ct));
  1905 > val conj = foldl1 HOLogic.mk_conj (isalist2list (term_of ct));
  1906 > cterm_of thy conj;
  1907 val it = "a = b & c = d & e = f & g = h" : cterm
  1908 *)
  1909 
  1910 
  1911 (* called only once, if a Subproblem has been located in the script*)
  1912 fun nxt_model_pbl (Subproblem'((_,pblID,metID),_,_,_,_)) ptp =
  1913 (* val (Subproblem'((_,pblID,metID),_,_,_,_),ptp) = (m', (pt,(p,p_)));
  1914    *)
  1915     (case metID of
  1916 	 ["no_met"] => 
  1917 	 (snd3 o hd o fst3) (nxt_specif (Refine_Tacitly pblID) ptp)
  1918        | _ => (snd3 o hd o fst3) (nxt_specif Model_Problem ptp))
  1919   (*all stored in tac_ itms     ^^^^^^^^^^*)
  1920   | nxt_model_pbl tac_ _ = 
  1921     raise error ("nxt_model_pbl: called by tac= "^tac_2str tac_);
  1922 (* run subp_rooteq.sml ''
  1923    until nxt=("Subproblem",Subproblem ("SqRoot.thy",["univariate","equation"]))
  1924 > val (_, (Subproblem'((_,pblID,metID),_,_,_,_),_,_,_,_,_)) =
  1925       (last_elem o drop_last) ets'';
  1926 > val mst = (last_elem o drop_last) ets'';
  1927 > nxt_model_pbl mst;
  1928 val it = Refine_Tacitly ["univariate","equation"] : tac
  1929 *)
  1930 
  1931 (*fun eq1 d (_,(d',_)) = (d = d'); ---modspec.sml*)
  1932 fun eq4 v (_,vts,_,_,_) = member op = vts v;
  1933 fun eq5 (_,_,_,_,itm_) (_,_,_,d,_) = d_in itm_ = d;
  1934 
  1935  
  1936 
  1937 (*
  1938   writeln (oris2str pors);
  1939 
  1940   writeln (itms2str_ thy pits);
  1941   writeln (itms2str_ thy mits);
  1942    *)
  1943 
  1944 
  1945 (*.complete _NON_empty calc-head for autocalc (sub-)pbl from oris
  1946   + met from fmz; assumes pos on PblObj, meth = [].*)
  1947 fun complete_mod (pt, pos as (p, p_):pos') =
  1948 (* val (pt, (p, _)) = (pt, p);
  1949    val (pt, (p, _)) = (pt, pos);
  1950    *)
  1951     let val _= if p_ <> Pbl 
  1952 	       then writeln("###complete_mod: only impl.for Pbl, called with "^
  1953 			    pos'2str pos) else ()
  1954 	val (PblObj{origin=(oris, ospec, hdl), probl, spec,...}) =
  1955 	    get_obj I pt p
  1956 	val (dI,pI,mI) = some_spec ospec spec
  1957 	val mpc = (#ppc o get_met) mI
  1958 	val ppc = (#ppc o get_pbt) pI
  1959 	val (pits, mits) = complete_mod_ (oris, mpc, ppc, probl)
  1960         val pt = update_pblppc pt p pits
  1961 	val pt = update_metppc pt p mits
  1962     in (pt, (p,Met):pos') end
  1963 ;
  1964 (*| complete_mod (pt, pos as (p, Met):pos') =
  1965     raise error ("###complete_mod: only impl.for Pbl, called with "^
  1966 		 pos'2str pos);*)
  1967 
  1968 (*.complete _EMPTY_ calc-head for autocalc (sub-)pbl from oris(+met from fmz);
  1969    oris and spec (incl. pbl-refinement) given from init_calc or SubProblem .*)
  1970 fun all_modspec (pt, (p,_):pos') =
  1971 (* val (pt, (p,_)) = ptp;
  1972    *)
  1973     let val (PblObj{fmz=(fmz_,_), origin=(pors, spec as (dI,pI,mI), hdl),
  1974 		    ...}) = get_obj I pt p;
  1975 	val thy = assoc_thy dI;
  1976 	val {ppc,...} = get_met mI;
  1977 	val mors = prep_ori fmz_ thy ppc;
  1978         val pt = update_pblppc pt p (map (ori2Coritm ppc) pors);
  1979 	val pt = update_metppc pt p (map (ori2Coritm ppc) mors);
  1980 	val pt = update_spec pt p (dI,pI,mI);
  1981     in (pt, (p,Met): pos') end;
  1982 
  1983 (*WN.12.03: use in nxt_spec, too ? what about variants ???*)
  1984 fun is_complete_mod_ ([]: itm list) = false
  1985   | is_complete_mod_ itms = 
  1986     foldl and_ (true, (map #3 itms));
  1987 fun is_complete_mod (pt, pos as (p, Pbl): pos') =
  1988     if (is_pblobj o (get_obj I pt)) p 
  1989     then (is_complete_mod_ o (get_obj g_pbl pt)) p
  1990     else raise error ("is_complete_mod: called by PrfObj at "^pos'2str pos)
  1991   | is_complete_mod (pt, pos as (p, Met)) = 
  1992     if (is_pblobj o (get_obj I pt)) p 
  1993     then (is_complete_mod_ o (get_obj g_met pt)) p
  1994     else raise error ("is_complete_mod: called by PrfObj at "^pos'2str pos)
  1995   | is_complete_mod (_, pos) =
  1996     raise error ("is_complete_mod called by "^pos'2str pos^
  1997 		 " (should be Pbl or Met)");
  1998 
  1999 (*.have (thy, pbl, met) _all_ been specified explicitly ?.*)
  2000 fun is_complete_spec (pt, pos as (p,_): pos') = 
  2001     if (not o is_pblobj o (get_obj I pt)) p 
  2002     then raise error ("is_complete_spec: called by PrfObj at "^pos'2str pos)
  2003     else let val (dI,pI,mI) = get_obj g_spec pt p
  2004 	 in dI<>e_domID andalso pI<>e_pblID andalso mI<>e_metID end;
  2005 (*.complete empty items in specification from origin (pbl, met ev.refined);
  2006   assumes 'is_complete_mod'.*)
  2007 fun complete_spec (pt, pos as (p,_): pos') = 
  2008     let val PblObj {origin = (_,ospec,_), spec,...} = get_obj I pt p
  2009 	val pt = update_spec pt p (some_spec ospec spec)
  2010     in (pt, pos) end;
  2011 
  2012 fun is_complete_modspec ptp = 
  2013     is_complete_mod ptp andalso is_complete_spec ptp;
  2014 
  2015 
  2016 
  2017 
  2018 fun pt_model (PblObj {meth,spec,origin=(_,spec',hdl),...}) Met =
  2019 (* val ((PblObj {meth,spec,origin=(_,spec',hdl),...}), Met) = (ppobj, p_);
  2020    *)
  2021     let val (_,_,metID) = get_somespec' spec spec'
  2022 	val pre = 
  2023 	    if metID = e_metID then []
  2024 	    else let val {prls,pre=where_,...} = get_met metID
  2025 		     val pre = check_preconds' prls where_ meth 0
  2026 		 in pre end
  2027 	val allcorrect = is_complete_mod_ meth
  2028 			 andalso foldl and_ (true, (map #1 pre))
  2029     in ModSpec (allcorrect, Met, hdl, meth, pre, spec) end
  2030   | pt_model (PblObj {probl,spec,origin=(_,spec',hdl),...}) _(*Frm,Pbl*) =
  2031 (* val ((PblObj {probl,spec,origin=(_,spec',hdl),...}),_) = (ppobj, p_);
  2032    *)
  2033     let val (_,pI,_) = get_somespec' spec spec'
  2034 	val pre =
  2035 	    if pI = e_pblID then []
  2036 	    else let val {prls,where_,cas,...} = get_pbt pI
  2037 		     val pre = check_preconds' prls where_ probl 0
  2038 		 in pre end
  2039 	val allcorrect = is_complete_mod_ probl
  2040 			 andalso foldl and_ (true, (map #1 pre))
  2041     in ModSpec (allcorrect, Pbl, hdl, probl, pre, spec) end;
  2042 
  2043 
  2044 fun pt_form (PrfObj {form,...}) = Form form
  2045   | pt_form (PblObj {probl,spec,origin=(_,spec',_),...}) =
  2046     let val (dI, pI, _) = get_somespec' spec spec'
  2047 	val {cas,...} = get_pbt pI
  2048     in case cas of
  2049 	   NONE => Form (pblterm dI pI)
  2050 	 | SOME t => Form (subst_atomic (mk_env probl) t)
  2051     end;
  2052 (*vvv takes the tac _generating_ the formula=result, asm ok....
  2053 fun pt_result (PrfObj {result=(t,asm), tac,...}) = 
  2054     (Form t, 
  2055      if null asm then NONE else SOME asm, 
  2056      SOME tac)
  2057   | pt_result (PblObj {result=(t,asm), origin = (_,ospec,_), spec,...}) =
  2058     let val (_,_,metID) = some_spec ospec spec
  2059     in (Form t, 
  2060 	if null asm then NONE else SOME asm, 
  2061 	if metID = e_metID then NONE else SOME (Apply_Method metID)) end;
  2062 -------------------------------------------------------------------------*)
  2063 
  2064 
  2065 (*.pt_extract returns
  2066       # the formula at pos
  2067       # the tactic applied to this formula
  2068       # the list of assumptions generated at this formula
  2069 	(by application of another tac to the preceding formula !)
  2070    pos is assumed to come from the frontend, ie. generated by moveDown.*)
  2071 (*cannot be in ctree.sml, because ModSpec has to be calculated*)
  2072 fun pt_extract (pt,([],Res)) =
  2073 (* val (pt,([],Res)) = ptp;
  2074    *)
  2075     let val (f, asm) = get_obj g_result pt []
  2076     in (Form f, NONE, asm) end
  2077 (* val p = [3,2];
  2078    *)
  2079   | pt_extract (pt,(p,Res)) =
  2080 (* val (pt,(p,Res)) = ptp;
  2081    *)
  2082     let val (f, asm) = get_obj g_result pt p
  2083 	val tac = if last_onlev pt p
  2084 		  then if is_pblobj' pt (lev_up p)
  2085 		       then let val (PblObj{spec=(_,pI,_),...}) = 
  2086 				    get_obj I pt (lev_up p)
  2087 			    in if pI = e_pblID then NONE 
  2088 			       else SOME (Check_Postcond pI) end
  2089 		       else SOME End_Trans (*WN0502 TODO for other branches*)
  2090 		  else let val p' = lev_on p
  2091 		       in if is_pblobj' pt p'
  2092 			  then let val (PblObj{origin = (_,(dI,pI,_),_),...}) =
  2093 				       get_obj I pt p'
  2094 			       in SOME (Subproblem (dI, pI)) end
  2095 			  else if f = get_obj g_form pt p'
  2096 			  then SOME (get_obj g_tac pt p')
  2097 			  (*because this Frm          ~~~is not on worksheet*)
  2098 			  else SOME (Take (term2str (get_obj g_form pt p')))
  2099 		       end
  2100     in (Form f, tac, asm) end
  2101 	
  2102   | pt_extract (pt, pos as (p,p_(*Frm,Pbl*))) =
  2103 (* val (pt, pos as (p,p_(*Frm,Pbl*))) = ptp;
  2104    val (pt, pos as (p,p_(*Frm,Pbl*))) = (pt, p);
  2105    *)
  2106     let val ppobj = get_obj I pt p
  2107 	val f = if is_pblobj ppobj then pt_model ppobj p_
  2108 		else get_obj pt_form pt p
  2109 	val tac = g_tac ppobj
  2110     in (f, SOME tac, []) end;
  2111 
  2112 
  2113 (**. get the formula from a ctree-node:
  2114  take form+res from PblObj and 1.PrfObj and (PrfObj after PblObj)
  2115  take res from all other PrfObj's .**)
  2116 (*designed for interSteps, outcommented 04 in favour of calcChangedEvent*)
  2117 fun formres p (Nd (PblObj {origin = (_,_, h), result = (r, _),...}, _)) =
  2118     [("headline", (p, Frm), h), 
  2119      ("stepform", (p, Res), r)]
  2120   | formres p (Nd (PrfObj {form, result = (r, _),...}, _)) = 
  2121     [("stepform", (p, Frm), form), 
  2122      ("stepform", (p, Res), r)];
  2123 
  2124 fun form p (Nd (PrfObj {result = (r, _),...}, _)) = 
  2125     [("stepform", (p, Res), r)]
  2126 
  2127 (*assumes to take whole level, in particular hd -- for use in interSteps*)
  2128 fun get_formress fs p [] = flat fs
  2129   | get_formress fs p (nd::nds) =
  2130     (* start with   'form+res'       and continue with trying 'res' only*)
  2131     get_forms (fs @ [formres p nd]) (lev_on p) nds
  2132 and get_forms fs p [] = flat fs
  2133   | get_forms fs p (nd::nds) =
  2134     if is_pblnd nd
  2135     (* start again with      'form+res' ///ugly repeat with Check_elementwise
  2136     then get_formress (fs @ [formres p nd]) (lev_on p) nds                   *)
  2137     then get_forms    (fs @ [formres p nd]) (lev_on p) nds
  2138     (* continue with trying 'res' only*)
  2139     else get_forms    (fs @ [form    p nd]) (lev_on p) nds;
  2140 
  2141 (**.get an 'interval' 'from' 'to' of formulae from a ptree.**)
  2142 (*WN050219 made robust against _'to' below or after Complete nodes
  2143 	   by handling exn caused by move_dn*)
  2144 (*WN0401 this functionality belongs to ctree.sml, 
  2145 but fetching a calc_head requires calculations defined in modspec.sml
  2146 transfer to ME/me.sml !!!
  2147 WN051224 ^^^ doesnt hold any longer, since only the headline of a calc_head
  2148 is returned !!!!!!!!!!!!!
  2149 *)
  2150 fun eq_pos' (p1,Frm) (p2,Frm) = p1 = p2
  2151   | eq_pos' (p1,Res) (p2,Res) = p1 = p2
  2152   | eq_pos' (p1,Pbl) (p2,p2_) = p1 = p2 andalso (case p2_ of
  2153 						     Pbl => true
  2154 						   | Met => true
  2155 						   | _ => false)
  2156   | eq_pos' (p1,Met) (p2,p2_) = p1 = p2 andalso (case p2_ of
  2157 						     Pbl => true
  2158 						   | Met => true
  2159 						   | _ => false)
  2160   | eq_pos' _ _ = false;
  2161 
  2162 (*.get an 'interval' from the ctree; 'interval' is w.r.t. the 
  2163    total ordering Position#compareTo(Position p) in the java-code
  2164 val get_interval = fn
  2165     : pos' ->     : from is "move_up 1st-element" to return
  2166       pos' -> 	  : to the last element to be returned; from < to
  2167       int -> 	  : level: 0 gets the flattest sub-tree possible
  2168 			   >999 gets the deepest sub-tree possible
  2169       ptree -> 	  : 
  2170       (pos' * 	  : of the formula
  2171        Term.term) : the formula
  2172 	  list
  2173 .*)
  2174 fun get_interval from to level pt =
  2175 (* val (from,level) = (f,lev);
  2176    val (from, to, level) = (([3, 2, 1], Res), ([],Res), 9999);
  2177    *)
  2178     let fun get_inter c (from:pos') (to:pos') lev pt =
  2179 (* val (c, from, to, lev) = ([], from, to, level);
  2180    ------for recursion.......
  2181    val (c, from:pos', to:pos') = (c @ [(from, f)], move_dn [] pt from, to);
  2182    *)
  2183 	    if eq_pos' from to orelse from = ([],Res)
  2184 	    (*orelse ... avoids Exception- PTREE "end of calculation" raised,
  2185 	     if 'to' has values NOT generated by move_dn, see systest/me.sml
  2186              TODO.WN0501: introduce an order on pos' and check "from > to"..
  2187              ...there is an order in Java! 
  2188              WN051224 the hack got worse with returning term instead ptform*)
  2189 	    then let val (f,_,_) = pt_extract (pt, from)
  2190 		 in case f of
  2191 			ModSpec (_,_,headline,_,_,_) => c @ [(from, headline)] 
  2192 		      | Form t => c @ [(from, t)]
  2193 		 end
  2194 	    else 
  2195 		if lev < lev_of from
  2196 		then (get_inter c (move_dn [] pt from) to lev pt)
  2197 		     handle (PTREE _(*from move_dn too far*)) => c
  2198 		else let val (f,_,_) = pt_extract (pt, from)
  2199 			 val term = case f of
  2200 					ModSpec (_,_,headline,_,_,_)=> headline
  2201 				      | Form t => t
  2202 		     in (get_inter (c @ [(from, term)]) 
  2203 				   (move_dn [] pt from) to lev pt)
  2204 			handle (PTREE _(*from move_dn too far*)) 
  2205 			       => c @ [(from, term)] end
  2206     in get_inter [] from to level pt end;
  2207 
  2208 (*for tests*)
  2209 fun posform2str (pos:pos', form) =
  2210     "("^ pos'2str pos ^", "^
  2211     (case form of 
  2212 	 Form f => term2str f
  2213        | ModSpec c => term2str (#3 c(*the headline*)))
  2214     ^")";
  2215 fun posforms2str pfs = (strs2str' o (map (curry op ^ "\n")) o 
  2216 			(map posform2str)) pfs;
  2217 fun posterm2str (pos:pos', t) =
  2218     "("^ pos'2str pos ^", "^term2str t^")";
  2219 fun posterms2str pfs = (strs2str' o (map (curry op ^ "\n")) o 
  2220 			(map posterm2str)) pfs;
  2221 
  2222 
  2223 (*WN050225 omits the last step, if pt is incomplete*)
  2224 fun show_pt pt = 
  2225     writeln (posterms2str (get_interval ([],Frm) ([],Res) 99999 pt));
  2226 
  2227 (*.get a calchead from a PblObj-node in the ctree; 
  2228    preconditions must be calculated.*)
  2229 fun get_ocalhd (pt, pos' as (p,Pbl):pos') = 
  2230     let val PblObj {origin = (oris, ospec, hdf'), spec, probl,...} = 
  2231 	    get_obj I pt p
  2232 	val {prls,where_,...} = get_pbt (#2 (some_spec ospec spec))
  2233 	val pre = check_preconds (assoc_thy"Isac.thy") prls where_ probl
  2234     in (ocalhd_complete probl pre spec, Pbl, hdf', probl, pre, spec):ocalhd end
  2235 | get_ocalhd (pt, pos' as (p,Met):pos') = 
  2236     let val PblObj {fmz = fmz as (fmz_,_), origin = (oris, ospec, hdf'), 
  2237 		    spec, meth,...} = 
  2238 	    get_obj I pt p
  2239 	val {prls,pre,...} = get_met (#3 (some_spec ospec spec))
  2240 	val pre = check_preconds (assoc_thy"Isac.thy") prls pre meth
  2241     in (ocalhd_complete meth pre spec, Met, hdf', meth, pre, spec):ocalhd end;
  2242 
  2243 (*.at the activeFormula set the Model, the Guard and the Specification 
  2244    to empty and return a CalcHead;
  2245    the 'origin' remains (for reconstructing all that).*)
  2246 fun reset_calchead (pt, pos' as (p,_):pos') = 
  2247     let val PblObj {origin = (_, _, hdf'),...} = get_obj I pt p
  2248 	val pt = update_pbl pt p []
  2249 	val pt = update_met pt p []
  2250 	val pt = update_spec pt p e_spec
  2251     in (pt, (p,Pbl):pos') end;
  2252 
  2253 (*---------------------------------------------------------------------*)
  2254 end
  2255 
  2256 open CalcHead;
  2257 (*---------------------------------------------------------------------*)
  2258