wneuper/isa: src/Tools/isac/Interpret/script.sml@767debe8a50c

     1 (* Title:  interpreter for scripts

     2    Author: Walther Neuper 2000

     3    (c) due to copyright terms

     4 12345678901234567890123456789012345678901234567890123456789012345678901234567890

     5         10        20        30        40        50        60        70        80

     6 *)

     8 signature INTERPRETER =

     9 sig

    10   (*type ets (list of executed tactics) see sequent.sml*)

    12   datatype locate

    13     = NotLocatable

    14     | Steps of (tac_ * mout * ptree * pos' * cid * safe (* ets*)) list

    15 (*    | ToDo of ets 28.4.02*)

    17   (*diss: next-tactic-function*)

    18   val next_tac : theory' -> ptree * pos' -> metID -> scr -> ets -> tac_

    19   (*diss: locate-function*)

    20   val locate_gen : theory'

    21                    -> tac_

    22                       -> ptree * pos' -> scr * rls -> ets -> loc_ -> locate

    24   val sel_rules : ptree -> pos' -> tac list

    25   val init_form : scr -> ets -> loc_ * term option (*FIXME not up to date*)

    26   val formal_args : term -> term list

    28   (*shift to library ...*)

    29   val inst_abs : theory' -> term -> term

    30   val itms2args : metID -> itm list -> term list

    31   val user_interrupt : loc_ * (tac_ * env * env * term * term * safe)

    32   (*val empty : term*)

    33 end

    38 (*

    39 structure Interpreter : INTERPRETER =

    40 struct

    41 *)

    43 (*.traces the leaves (ie. non-tactical nodes) of the script

    44    found by next_tac.

    45    a leaf is either a tactic or an 'exp' in 'let v = expr'

    46    where 'exp' does not contain a tactic.*)

    47 val trace_script = Unsynchronized.ref false;

    49 type step =     (*data for creating a new node in the ptree;

    50 		 designed for use:

    51                	 fun ass* scrstate steps =

    52                	 ... case ass* scrstate steps of

    53                	     Assoc (scrstate, steps) => ... ass* scrstate steps*)

    54     tac_       (*transformed from associated tac*)

    55     * mout       (*result with indentation etc.*)

    56     * ptree      (*containing node created by tac_ + resp. scrstate*)

    57     * pos'       (*position in ptree; ptree * pos' is the proofstate*)

    58     * pos' list; (*of ptree-nodes probably cut (by fst tac_)*)

    59 val e_step = (Empty_Tac_, EmptyMout, EmptyPtree, e_pos',[]:pos' list):step;

    61 fun rule2thm' (Thm (id, thm)) = (id, string_of_thmI thm):thm'

    62   | rule2thm' r = error ("rule2thm': not defined for "^(rule2str r));

    63 fun rule2rls' (Rls_ rls) = id_rls rls

    64   | rule2rls' r = error ("rule2rls': not defined for "^(rule2str r));

    66 (*.makes a (rule,term) list to a Step (m, mout, pt', p', cid) for solve;

    67    complicated with current t in rrlsstate.*)

    68 fun rts2steps steps ((pt,p),(f,f'',rss,rts),(thy',ro,er,pa)) [(r, (f', am))] =

    69       let

    70         val thy = assoc_thy thy'

    71         val ctxt = get_ctxt pt p |> insert_assumptions am

    72 	      val m = Rewrite' (thy', ro, er, pa, rule2thm' r, f, (f', am))

    73 	      val is = RrlsState (f', f'', rss, rts)

    74 	      val p = case p of (p',Frm) => p | (p',Res) => (lev_on p',Res)

    75 	      val (p', cid, mout, pt') = generate1 thy m (is, ctxt) p pt

    76       in (is, (m, mout, pt', p', cid) :: steps) end

    77   | rts2steps steps ((pt,p),(f,f'',rss,rts),(thy',ro,er,pa)) ((r, (f', am))::rts') =

    78       let

    79         val thy = assoc_thy thy'

    80         val ctxt = get_ctxt pt p |> insert_assumptions am

    81 	      val m = Rewrite' (thy',ro,er,pa, rule2thm' r, f, (f', am))

    82 	      val is = RrlsState (f',f'',rss,rts)

    83 	      val p = case p of (p',Frm) => p | (p',Res) => (lev_on p',Res)

    84 	      val (p', cid, mout, pt') = generate1 thy m (is, ctxt) p pt

    85       in rts2steps ((m, mout, pt', p', cid)::steps)

    86 		    ((pt',p'),(f',f'',rss,rts),(thy',ro,er,pa)) rts' end;

    88 (*. functions for the environment stack .*)

    89 fun accessenv id es = the (assoc((top es):env, id))

    90     handle _ => error ("accessenv: "^(free2str id)^" not in env");

    91 fun updateenv id vl (es:env stack) =

    92     (push (overwrite(top es, (id, vl))) (pop es)):env stack;

    93 fun pushenv id vl (es:env stack) =

    94     (push (overwrite(top es, (id, vl))) es):env stack;

    95 val popenv = pop:env stack -> env stack;

    99 fun de_esc_underscore str =

   100   let fun scan [] = []

   101 	| scan (s::ss) = if s = "'" then (scan ss)

   102 			 else (s::(scan ss))

   103   in (implode o scan o Symbol.explode) str end;

   104 (*

   105 > val str = "Rewrite_Set_Inst";

   106 > val esc = esc_underscore str;

   107 val it = "Rewrite'_Set'_Inst" : string

   108 > val des = de_esc_underscore esc;

   109  val des = de_esc_underscore esc;*)

   111 (*go at a location in a script and fetch the contents*)

   112 fun go [] t = t

   113   | go (D::p) (Abs(s,ty,t0)) = go (p:loc_) t0

   114   | go (L::p) (t1 $ t2) = go p t1

   115   | go (R::p) (t1 $ t2) = go p t2

   116   | go l _ = error ("go: no "^(loc_2str l));

   117 (*

   118 > val t = (term_of o the o (parse thy)) "a+b";

   119 val it = Const (#,#) $ Free (#,#) $ Free ("b","RealDef.real") : term

   120 > val plus_a = go [L] t;

   121 > val b = go [R] t;

   122 > val plus = go [L,L] t;

   123 > val a = go [L,R] t;

   125 > val t = (term_of o the o (parse thy)) "a+b+c";

   126 val t = Const (#,#) $ (# $ # $ Free #) $ Free ("c","RealDef.real") : term

   127 > val pl_pl_a_b = go [L] t;

   128 > val c = go [R] t;

   129 > val a = go [L,R,L,R] t;

   130 > val b = go [L,R,R] t;

   131 *)

   134 (* get a subterm t with test t, and record location *)

   135 fun get l test (t as Const (s,T)) =

   136     if test t then SOME (l,t) else NONE

   137   | get l test (t as Free (s,T)) =

   138     if test t then SOME (l,t) else NONE

   139   | get l test (t as Bound n) =

   140     if test t then SOME (l,t) else NONE

   141   | get l test (t as Var (s,T)) =

   142     if test t then SOME (l,t) else NONE

   143   | get l test (t as Abs (s,T,body)) =

   144     if test t then SOME (l:loc_,t) else get ((l@[D]):loc_) test body

   145   | get l test (t as t1 $ t2) =

   146     if test t then SOME (l,t)

   147     else case get (l@[L]) test t1 of

   148       NONE => get (l@[R]) test t2

   149     | SOME (l',t') => SOME (l',t');

   150 (*18.6.00

   151 > val sss = ((term_of o the o (parse thy))

   152   "Script Solve_root_equation (eq_::bool) (v_::real) (err_::bool) =\

   153    \ (let e_ = Try (Rewrite square_equation_left True eq_) \

   154    \  in [e_])");

   155           ______ compares head_of !!

   156 > get [] (eq_str "HOL.Let") sss;            [R]

   157 > get [] (eq_str "Script.Try") sss;     [R,L,R]

   158 > get [] (eq_str "Script.Rewrite") sss; [R,L,R,R]

   159 > get [] (eq_str "HOL.True") sss;           [R,L,R,R,L,R]

   160 > get [] (eq_str "e_") sss;             [R,R]

   161 *)

   163 fun test_negotiable t =

   164     member op = (!negotiable)

   165            ((strip_thy o (term_str (Thy_Info.get_theory "Script")) o head_of) t);

   167 (*.get argument of first stactic in a script for init_form.*)

   168 fun get_stac thy (h $ body) =

   169   let

   170     fun get_t y (Const ("Script.Seq",_) $ e1 $ e2) a =

   171     	(case get_t y e1 a of NONE => get_t y e2 a | la => la)

   172       | get_t y (Const ("Script.Seq",_) $ e1 $ e2 $ a) _ =

   173     	(case get_t y e1 a of NONE => get_t y e2 a | la => la)

   174       | get_t y (Const ("Script.Try",_) $ e) a = get_t y e a

   175       | get_t y (Const ("Script.Try",_) $ e $ a) _ = get_t y e a

   176       | get_t y (Const ("Script.Repeat",_) $ e) a = get_t y e a

   177       | get_t y (Const ("Script.Repeat",_) $ e $ a) _ = get_t y e a

   178       | get_t y (Const ("Script.Or",_) $e1 $ e2) a =

   179     	(case get_t y e1 a of NONE => get_t y e2 a | la => la)

   180       | get_t y (Const ("Script.Or",_) $e1 $ e2 $ a) _ =

   181     	(case get_t y e1 a of NONE => get_t y e2 a | la => la)

   182       | get_t y (Const ("Script.While",_) $ c $ e) a = get_t y e a

   183       | get_t y (Const ("Script.While",_) $ c $ e $ a) _ = get_t y e a

   184       | get_t y (Const ("Script.Letpar",_) $ e1 $ Abs (_,_,e2)) a =

   185     	(case get_t y e1 a of NONE => get_t y e2 a | la => la)

   186     (*| get_t y (Const ("HOL.Let",_) $ e1 $ Abs (_,_,e2)) a =

   187 	    (case get_t y e1 a of NONE => get_t y e2 a | la => la)

   188       | get_t y (Abs (_,_,e)) a = get_t y e a*)

   189       | get_t y (Const ("HOL.Let",_) $ e1 $ Abs (_,_,e2)) a =

   190     	get_t y e1 a (*don't go deeper without evaluation !*)

   191       | get_t y (Const ("If",_) $ c $ e1 $ e2) a = NONE

   192     	(*(case get_t y e1 a of NONE => get_t y e2 a | la => la)*)

   194       | get_t y (Const ("Script.Rewrite",_) $ _ $ _ $ a) _ = SOME a

   195       | get_t y (Const ("Script.Rewrite",_) $ _ $ _    ) a = SOME a

   196       | get_t y (Const ("Script.Rewrite'_Inst",_) $ _ $ _ $ _ $ a) _ = SOME a

   197       | get_t y (Const ("Script.Rewrite'_Inst",_) $ _ $ _ $ _ )    a = SOME a

   198       | get_t y (Const ("Script.Rewrite'_Set",_) $ _ $ _ $ a) _ = SOME a

   199       | get_t y (Const ("Script.Rewrite'_Set",_) $ _ $ _ )    a = SOME a

   200       | get_t y (Const ("Script.Rewrite'_Set'_Inst",_) $ _ $ _ $ _ $a)_ =SOME a

   201       | get_t y (Const ("Script.Rewrite'_Set'_Inst",_) $ _ $ _ $ _ )  a =SOME a

   202       | get_t y (Const ("Script.Calculate",_) $ _ $ a) _ = SOME a

   203       | get_t y (Const ("Script.Calculate",_) $ _ )    a = SOME a

   205       | get_t y (Const ("Script.Substitute",_) $ _ $ a) _ = SOME a

   206       | get_t y (Const ("Script.Substitute",_) $ _ )    a = SOME a

   208       | get_t y (Const ("Script.SubProblem",_) $ _ $ _) _ = NONE

   210       | get_t y x _ =

   211 	((*tracing ("### get_t yac: list-expr "^(term2str x));*)

   212 	 NONE)

   213 in get_t thy body e_term end;

   215 (*FIXME: get 1st stac by next_stac [] instead of ... ?? 29.7.02*)

   216 (* val Script sc = scr;

   217    *)

   218 fun init_form thy (Script sc) env =

   219   (case get_stac thy sc of

   220      NONE => NONE

   221              (*error ("init_form: no 1st stac in "^

   222 	      (Print_Mode.setmp [] (Syntax.string_of_term (thy2ctxt thy)) sc))*)

   223    | SOME stac => SOME (subst_atomic env stac))

   224   | init_form _ _ _ = error "init_form: no match";

   226 (* use"ME/script.sml";

   227    use"script.sml";

   228    *)

   232 (*the 'iteration-argument' of a stac (args not eval)*)

   233 fun itr_arg _ (Const ("Script.Rewrite'_Inst",_) $ _ $ _ $ _ $ v) = v

   234   | itr_arg _ (Const ("Script.Rewrite",_) $ _ $ _ $ v) = v

   235   | itr_arg _ (Const ("Script.Rewrite'_Set'_Inst",_) $ _ $ _ $ _ $ v) = v

   236   | itr_arg _ (Const ("Script.Rewrite'_Set",_) $ _ $ _ $ v) = v

   237   | itr_arg _ (Const ("Script.Calculate",_) $ _ $ v) = v

   238   | itr_arg _ (Const ("Script.Check'_elementwise",_) $ consts $ _) = consts

   239   | itr_arg _ (Const ("Script.Or'_to'_List",_) $ _) = e_term

   240   | itr_arg _ (Const ("Script.Tac",_) $ _) = e_term

   241   | itr_arg _ (Const ("Script.SubProblem",_) $ _ $ _) = e_term

   242   | itr_arg thy t = error

   243     ("itr_arg not impl. for " ^

   244     (Print_Mode.setmp [] (Syntax.string_of_term (thy2ctxt (assoc_thy thy))) t));

   245 (* val t = (term_of o the o (parse thy))"Rewrite rroot_square_inv False e_";

   246 > itr_arg "Script" t;

   247 val it = Free ("e_","RealDef.real") : term

   248 > val t = (term_of o the o (parse thy))"xxx";

   249 > itr_arg "Script" t;

   250 *** itr_arg not impl. for xxx

   251 uncaught exception ERROR

   252   raised at: library.ML:1114.35-1114.40*)

   255 (*.get the arguments of the script out of the scripts parsetree.*)

   256 fun formal_args scr = (fst o split_last o snd o strip_comb) scr;

   257 (*

   258 > formal_args scr;

   259   [Free ("f_","RealDef.real"),Free ("v_","RealDef.real"),

   260    Free ("eqs_","bool List.list")] : term list

   261 *)

   263 (*.get the identifier of the script out of the scripts parsetree.*)

   264 fun id_of_scr sc = (id_of o fst o strip_comb) sc;

   266 (*WN020526: not clear, when a is available in ass_up for eva-_true*)

   267 (*WN060906: in "fun handle_leaf" eg. uses "SOME M__"(from some PREVIOUS

   268   curried Rewrite) for CURRENT value (which may be different from PREVIOUS);

   269   thus "NONE" must be set at the end of currying (ill designed anyway)*)

   270 fun upd_env_opt env (SOME a, v) = upd_env env (a,v)

   271   | upd_env_opt env (NONE, v) =

   272       (tracing ("*** upd_env_opt: (NONE," ^ term2str v ^ ")"); env);

   274 type dsc = typ; (*<-> nam..unknow in Descript.thy*)

   275 fun typ_str (Type (s,_)) = s

   276   | typ_str (TFree(s,_)) = s

   277   | typ_str (TVar ((s,i),_)) = s ^ (string_of_int i);

   279 (*get the _result_-type of a description*)

   280 fun dsc_valT (Const (_,(Type (_,[_,T])))) = (strip_thy o typ_str) T;

   281 (*> val t = (term_of o the o (parse thy)) "equality";

   282 > val T = type_of t;

   283 val T = "bool => Tools.una" : typ

   284 > val dsc = dsc_valT t;

   285 val dsc = "una" : string

   287 > val t = (term_of o the o (parse thy)) "fixedValues";

   288 > val T = type_of t;

   289 val T = "bool List.list => Tools.nam" : typ

   290 > val dsc = dsc_valT t;

   291 val dsc = "nam" : string*)

   293 (*.from penv in itm_ make args for script depending on type of description.*)

   294 (*6.5.03 TODO: push penv into script -- and drop mk_arg here || drop penv

   295   9.5.03 penv postponed: penv = env for script at the moment, (*mk_arg*)*)

   296 fun mk_arg thy d [] =

   297     error ("mk_arg: no data for " ^

   298 	   (Print_Mode.setmp [] (Syntax.string_of_term (thy2ctxt thy)) d))

   299   | mk_arg thy d [t] =

   300     (case dsc_valT d of

   301 	 "una" => [t]

   302        | "nam" =>

   303 	 [case t of

   304 	      r as (Const ("HOL.eq",_) $ _ $ _) => r

   305 	    | _ => error ("mk_arg: dsc-typ 'nam' applied to non-equality "^

   306 		     (Print_Mode.setmp [] (Syntax.string_of_term

   307                                                (thy2ctxt thy)) t))]

   308        | s => error ("mk_arg: not impl. for "^s))

   310   | mk_arg thy d (t::ts) = (mk_arg thy d [t]) @ (mk_arg thy d ts);

   311 (*

   312  val d = d_in itm_;

   313  val [t] = ts_in itm_;

   314 mk_arg thy

   315 *)

   320 (*.create the actual parameters (args) of script: their order

   321   is given by the order in met.pat .*)

   322 (*WN.5.5.03: ?: does this allow for different descriptions ???

   323              ?: why not taken from formal args of script ???

   324 !: FIXXXME penv: push it here in itms2args into script-evaluation*)

   325 (* val (thy, mI, itms) = (thy, metID, itms);

   326    *)

   327 fun itms2args thy mI (itms:itm list) =

   328     let val mvat = max_vt itms

   329 	fun okv mvat (_,vats,b,_,_) = member op = vats mvat andalso b

   330 	val itms = filter (okv mvat) itms

   331 	fun test_dsc d (_,_,_,_,itm_) = (d = d_in itm_)

   332 	fun itm2arg itms (_,(d,_)) =

   333 	    case find_first (test_dsc d) itms of

   334 		NONE =>

   335 		error ("itms2args: '"^term2str d^"' not in itms")

   336 	      (*| SOME (_,_,_,_,itm_) => mk_arg thy (d_in itm_) (ts_in itm_);

   337                penv postponed; presently penv holds already env for script*)

   338 	      | SOME (_,_,_,_,itm_) => penvval_in itm_

   339 	fun sel_given_find (s,_) = (s = "#Given") orelse (s = "#Find")

   340 	val pats = (#ppc o get_met) mI

   341     in (flat o (map (itm2arg itms))) pats end;

   342 (*

   343 > val sc = ... Solve_root_equation ...

   344 > val mI = ("Script","sqrt-equ-test");

   345 > val PblObj{meth={ppc=itms,...},...} = get_obj I pt [];

   346 > val ts = itms2args thy mI itms;

   347 > map (Print_Mode.setmp [] (Syntax.string_of_term (thy2ctxt thy))) ts;

   348 ["sqrt (#9 + #4 * x) = sqrt x + sqrt (#5 + x)","x","#0"] : string list

   349 *)

   352 (*detour necessary, because generate1 delivers a string-result*)

   353 fun mout2term thy (Form' (FormKF (_,_,_,_,res))) =

   354   (term_of o the o (parse (assoc_thy thy))) res

   355   | mout2term thy (Form' (PpcKF _)) = e_term;(*3.8.01: res of subpbl

   356 					   at time of detection in script*)

   358 (*.convert a script-tac 'stac' to a tactic 'tac'; if stac is an initac,

   359    then convert to a 'tac_' (as required in appy).

   360    arg pt:ptree for pushing the thy specified in rootpbl into subpbls.*)

   361 fun stac2tac_ pt thy (Const ("Script.Rewrite",_) $ Free (thmID,_) $ _ $ f) =

   362       let

   363         val tid = (de_esc_underscore o strip_thy) thmID

   364       in (Rewrite (tid, (string_of_thmI o (assoc_thm' thy)) (tid,"")), Empty_Tac_)

   365       end

   367   | stac2tac_ pt thy (Const ("Script.Rewrite'_Inst",_) $ sub $ Free (thmID,_) $ _ $ f) =

   368       let

   369         val subML = ((map isapair2pair) o isalist2list) sub

   370         val subStr = subst2subs subML

   371         val tid = (de_esc_underscore o strip_thy) thmID (*4.10.02 unnoetig*)

   372       in (Rewrite_Inst (subStr, (tid, (string_of_thmI o (assoc_thm' thy)) (tid,""))), Empty_Tac_)

   373       end

   375   | stac2tac_ pt thy (Const ("Script.Rewrite'_Set",_) $ Free (rls,_) $ _ $ f) =

   376       (Rewrite_Set ((de_esc_underscore o strip_thy) rls), Empty_Tac_)

   378   | stac2tac_ pt thy (Const ("Script.Rewrite'_Set'_Inst",_) $ sub $ Free (rls,_) $ _ $ f) =

   379       let

   380         val subML = ((map isapair2pair) o isalist2list) sub;

   381         val subStr = subst2subs subML;

   382       in (Rewrite_Set_Inst (subStr,rls), Empty_Tac_) end

   384   | stac2tac_ pt thy (Const ("Script.Calculate",_) $ Free (op_,_) $ f) =

   385       (Calculate op_, Empty_Tac_)

   387   | stac2tac_ pt thy (Const ("Script.Take",_) $ t) =

   388       (Take (term2str t), Empty_Tac_)

   390   | stac2tac_ pt thy (Const ("Script.Substitute",_) $ isasub $ arg) =

   391       (Substitute ((subte2sube o isalist2list) isasub), Empty_Tac_)

   393   | stac2tac_ pt thy (Const("Script.Check'_elementwise",_) $ _ $

   394 		(set as Const ("Set.Collect",_) $ Abs (_,_,pred))) =

   395       (Check_elementwise (Print_Mode.setmp [] (Syntax.string_of_term

   396                           (thy2ctxt thy)) pred), (*set*)Empty_Tac_)

   398   | stac2tac_ pt thy (Const("Script.Or'_to'_List",_) $ _ ) =

   399       (Or_to_List, Empty_Tac_)

   401     (*12.1.01.for subproblem_equation_dummy in root-equation *)

   402   | stac2tac_ pt thy (Const ("Script.Tac",_) $ Free (str,_)) =

   403       (Tac ((de_esc_underscore o strip_thy) str),  Empty_Tac_)

   405     (*compare "| assod _ (Subproblem'"*)

   406   | stac2tac_ pt thy (stac as Const ("Script.SubProblem",_) $

   407 	  (Const ("Product_Type.Pair",_) $Free (dI',_) $

   408 		 (Const ("Product_Type.Pair",_) $ pI' $ mI')) $ ags') =

   409       let

   410         val dI = ((implode o drop_last(*.."'"*) o Symbol.explode) dI')(*^""*);

   411         val thy = maxthy (assoc_thy dI) (rootthy pt);

   412 	      val pI = ((map (de_esc_underscore o free2str)) o isalist2list) pI';

   413 	      val mI = ((map (de_esc_underscore o free2str)) o isalist2list) mI';

   414 	      val ags = isalist2list ags';

   415 	      val (pI, pors, mI) =

   416 	        if mI = ["no_met"]

   417 	        then

   418             let

   419               val pors = (match_ags thy ((#ppc o get_pbt) pI) ags)

   420 			          handle ERROR "actual args do not match formal args"

   421 				        => (match_ags_msg pI stac ags(*raise exn*); [])

   422 		          val pI' = refine_ori' pors pI;

   423 		        in (pI', pors (*refinement over models with diff.prec only*),

   424 		            (hd o #met o get_pbt) pI') end

   425 	        else (pI, (match_ags thy ((#ppc o get_pbt) pI) ags)

   426 		        handle ERROR "actual args do not match formal args"

   427 			      => (match_ags_msg pI stac ags(*raise exn*); []), mI);

   428         val (fmz_, vals) = oris2fmz_vals pors;

   429 	      val {cas,ppc,thy,...} = get_pbt pI

   430 	      val dI = theory2theory' thy (*.take dI from _refined_ pbl.*)

   431 	      val dI = theory2theory' (maxthy (assoc_thy dI) (rootthy pt));

   432         val ctxt = ProofContext.init_global

   433         val ctxt = dI |> Thy_Info.get_theory |> ProofContext.init_global

   434           |> declare_constraints' vals

   435 	      val hdl =

   436           case cas of

   437 		        NONE => pblterm dI pI

   438 		      | SOME t => subst_atomic ((vars_of_pbl_' ppc) ~~~ vals) t

   439         val f = subpbl (strip_thy dI) pI

   440       in (Subproblem (dI, pI),	Subproblem' ((dI, pI, mI), pors, hdl, fmz_, ctxt, f))

   441       end

   443   | stac2tac_ pt thy t = error

   444   ("stac2tac_ TODO: no match for " ^

   445    (Print_Mode.setmp [] (Syntax.string_of_term (thy2ctxt thy)) t));

   447 fun stac2tac pt thy t = (fst o stac2tac_ pt thy) t;

   449 (*test a term for being a _list_ (set ?) of constants; could be more rigorous*)

   450 fun list_of_consts (Const ("List.list.Cons",_) $ _ $ _) = true

   451   | list_of_consts (Const ("List.list.Nil",_)) = true

   452   | list_of_consts _ = false;

   453 (*val ttt = (term_of o the o (parse thy)) "[x=#1,x=#2,x=#3]";

   454 > list_of_consts ttt;

   455 val it = true : bool

   456 > val ttt = (term_of o the o (parse thy)) "[]";

   457 > list_of_consts ttt;

   458 val it = true : bool*)

   462 datatype ass =

   463     Ass of

   464       tac_ *   (* SubProblem gets args instantiated in assod *)

   465   	  term     (* for itr_arg, result in ets *)

   466   | AssWeak of

   467       tac_ *

   468   	  term     (*for itr_arg,result in ets*)

   469   | NotAss;

   471 (* check if tac_ is associated with stac.

   472    Additional task: check if term t (the result has been calculated from) in tac_

   473    has been changed (see "datatype tac_"); if yes, recalculate result

   474    TODO.WN120106 recalculate impl.only for Substitute'

   475 args

   476   pt     : ptree for pushing the thy specified in rootpbl into subpbls

   477   d      : unused (planned for data for comparison)

   478   tac_   : from user (via applicable_in); to be compared with ...

   479   stac   : found in Script

   480 returns

   481   Ass    : associated: e.g. thmID in stac = thmID in m

   482                        +++ arg   in stac = arg   in m

   483   AssWeak: weakly ass.:e.g. thmID in stac = thmID in m, //arg//

   484   NotAss :             e.g. thmID in stac/=/thmID in m (not =)

   485 *)

   486 fun assod pt d (m as Rewrite_Inst' (thy',rod,rls,put,subs,(thmID,thm),f,(f',asm))) stac =

   487       (case stac of

   488 	       (Const ("Script.Rewrite'_Inst",_) $ subs_ $ Free (thmID_,idT) $b$f_) =>

   489 	          if thmID = thmID_

   490             then

   491 	            if f = f_

   492               then ((*tracing"3### assod ..Ass";*)Ass (m,f'))

   493 	            else ((*tracing"3### assod ..AssWeak";*)AssWeak(m, f'))

   494 	          else ((*tracing"3### assod ..NotAss";*)NotAss)

   495        | (Const ("Script.Rewrite'_Set'_Inst",_) $ sub_ $ Free (rls_,_) $_$f_) =>

   496 	          if contains_rule (Thm (thmID, refl(*dummy*))) (assoc_rls rls_)

   497             then

   498 	            if f = f_ then Ass (m,f') else AssWeak (m,f')

   499 	          else NotAss

   500        | _ => NotAss)

   502   | assod pt d (m as Rewrite' (thy,rod,rls,put,(thmID,thm),f,(f',asm))) stac =

   503       (case stac of

   504 	       (t as Const ("Script.Rewrite",_) $ Free (thmID_,idT) $ b $ f_) =>

   505 	         ((*tracing ("3### assod: stac = " ^ ter2str t);

   506 	          tracing ("3### assod: f(m)= " ^ term2str f);*)

   507 	          if thmID = thmID_

   508             then

   509 	            if f = f_

   510               then ((*tracing"3### assod ..Ass";*)Ass (m,f'))

   511 	            else

   512                 ((*tracing"### assod ..AssWeak";

   513 		             tracing("### assod: f(m)  = " ^ term2str f);

   514 		             tracing("### assod: f(stac)= " ^ term2str f_)*)

   515 		             AssWeak (m,f'))

   516 	          else ((*tracing"3### assod ..NotAss";*)NotAss))

   517        | (Const ("Script.Rewrite'_Set",_) $ Free (rls_,_) $ _ $ f_) =>

   518 	          if contains_rule (Thm (thmID, refl(*dummy*))) (assoc_rls rls_)

   519             then

   520 	            if f = f_ then Ass (m,f') else AssWeak (m,f')

   521 	          else NotAss

   522        | _ => NotAss)

   524   | assod pt d (m as Rewrite_Set_Inst' (thy',put,sub,rls,f,(f',asm)))

   525     (Const ("Script.Rewrite'_Set'_Inst",_) $ sub_ $ Free (rls_,_) $ _ $ f_) =

   526       if id_rls rls = rls_

   527       then

   528         if f = f_ then Ass (m,f') else AssWeak (m,f')

   529       else NotAss

   531   | assod pt d (m as Detail_Set_Inst' (thy',put,sub,rls,f,(f',asm)))

   532     (Const ("Script.Rewrite'_Set'_Inst",_) $ sub_ $ Free (rls_,_) $ _ $ f_) =

   533       if id_rls rls = rls_

   534       then

   535         if f = f_ then Ass (m,f') else AssWeak (m,f')

   536       else NotAss

   538   | assod pt d (m as Rewrite_Set' (thy,put,rls,f,(f',asm)))

   539     (Const ("Script.Rewrite'_Set",_) $ Free (rls_,_) $ _ $ f_) =

   540       if id_rls rls = rls_

   541       then

   542         if f = f_ then Ass (m,f') else AssWeak (m,f')

   543       else NotAss

   545   | assod pt d (m as Detail_Set' (thy,put,rls,f,(f',asm)))

   546     (Const ("Script.Rewrite'_Set",_) $ Free (rls_,_) $ _ $ f_) =

   547       if id_rls rls = rls_

   548       then

   549         if f = f_ then Ass (m,f') else AssWeak (m,f')

   550       else NotAss

   552   | assod pt d (m as Calculate' (thy',op_,f,(f',thm'))) stac =

   553       (case stac of

   554 	       (Const ("Script.Calculate",_) $ Free (op__,_) $ f_) =>

   555 	         if op_ = op__

   556            then

   557 	           if f = f_ then Ass (m,f') else AssWeak (m,f')

   558 	         else NotAss

   559        | (Const ("Script.Rewrite'_Set'_Inst",_) $ sub_ $ Free(rls_,_) $_$f_)  =>

   560 	         if contains_rule (Calc (snd (assoc1 (!calclist', op_)))) (assoc_rls rls_)

   561            then

   562 	           if f = f_ then Ass (m,f') else AssWeak (m,f')

   563 	         else NotAss

   564        | (Const ("Script.Rewrite'_Set",_) $ Free (rls_, _) $ _ $ f_) =>

   565 	         if contains_rule (Calc (snd (assoc1 (!calclist', op_)))) (assoc_rls rls_)

   566            then

   567 	           if f = f_ then Ass (m,f') else AssWeak (m,f')

   568 	         else NotAss

   569        | _ => NotAss)

   570 (*

   571   | assod pt _ (m as Check_elementwise' (consts,_,(consts_chkd,_)))

   572     (Const ("Script.Check'_elementwise",_) $ consts' $ _) =

   573       (tracing("### assod Check'_elementwise: consts= "^(term2str consts)^

   574 	     ", consts'= "^(term2str consts'));

   575        atomty consts; atomty consts';

   576        if consts = consts'

   577        then (tracing"### assod Check'_elementwise: Ass"; Ass (m, consts_chkd))

   578        else (tracing"### assod Check'_elementwise: NotAss"; NotAss))

   579 *)

   580   | assod pt _ (m as Check_elementwise' (consts,_,(consts_chkd,_)))

   581     (Const ("Script.Check'_elementwise",_) $ consts' $ _) =

   582       if consts = consts'

   583       then Ass (m, consts_chkd)

   584       else NotAss

   586   | assod pt _ (m as Or_to_List' (ors, list)) (Const ("Script.Or'_to'_List",_) $ _) =

   587 	    Ass (m, list)

   589   | assod pt _ (m as Take' term) (Const ("Script.Take",_) $ _) =

   590 	    Ass (m, term)

   592   | assod pt _ (m as Substitute' (ro, erls, subte, f, f')) (Const ("Script.Substitute",_) $ _ $ t) =

   593 	    if f = t then Ass (m, f')

   594 	    else (*compare | applicable_in (p,p_) pt (m as Substitute sube)*)

   595 		    if foldl and_ (true, map contains_Var subte)

   596 		    then

   597 		      let val t' = subst_atomic (map HOLogic.dest_eq subte (*TODO subte2subst*)) t

   598 		      in if t = t' then error "assod: Substitute' not applicable to val of Expr"

   599 		         else Ass (Substitute' (ro, erls, subte, t, t'), t')

   600 		      end

   601 		    else (case rewrite_terms_ (Isac()) ro erls subte t of

   602 		         SOME (t', _) =>  Ass (Substitute' (ro, erls, subte, t, t'), t')

   603 		       | NONE => error "assod: Substitute' not applicable to val of Expr")

   605   | assod pt _ (m as Tac_ (thy,f,id,f')) (Const ("Script.Tac",_) $ Free (id',_)) =

   606       if id = id'

   607       then Ass (m, ((term_of o the o (parse thy)) f'))

   608       else NotAss

   610     (*compare "| stac2tac_ thy (Const ("Script.SubProblem",_)"*)

   611   | assod pt _ (Subproblem' ((domID,pblID,metID),_,_,_,_,f))

   612 	  (stac as Const ("Script.SubProblem",_) $ (Const ("Product_Type.Pair",_) $

   613 		 Free (dI',_) $ (Const ("Product_Type.Pair",_) $ pI' $ mI')) $ ags') =

   614       let

   615         val dI = ((implode o drop_last(*.."'"*) o Symbol.explode) dI')(*^""*);

   616         val thy = maxthy (assoc_thy dI) (rootthy pt);

   617 	      val pI = ((map (de_esc_underscore o free2str)) o isalist2list) pI';

   618 	      val mI = ((map (de_esc_underscore o free2str)) o isalist2list) mI';

   619 	      val ags = isalist2list ags';

   620 	      val (pI, pors, mI) =

   621 	        if mI = ["no_met"]

   622 	        then

   623             let

   624               val pors = (match_ags thy ((#ppc o get_pbt) pI) ags)

   625 			          handle ERROR "actual args do not match formal args"

   626 				        => (match_ags_msg pI stac ags(*raise exn*);[]);

   627 		          val pI' = refine_ori' pors pI;

   628 		        in (pI', pors (*refinement over models with diff.prec only*),

   629 		            (hd o #met o get_pbt) pI')

   630             end

   631 	        else (pI, (match_ags thy ((#ppc o get_pbt) pI) ags)

   632 		        handle ERROR "actual args do not match formal args"

   633 			      => (match_ags_msg pI stac ags(*raise exn*);[]), mI);

   634         val (fmz_, vals) = oris2fmz_vals pors;

   635 	      val {cas, ppc, thy,...} = get_pbt pI

   636 	      val dI = theory2theory' thy (*take dI from _refined_ pbl*)

   637 	      val dI = theory2theory' (maxthy (assoc_thy dI) (rootthy pt))

   638 	      val ctxt = dI |> Thy_Info.get_theory |> ProofContext.init_global

   639           |> declare_constraints' vals

   640 	      val hdl =

   641           case cas of

   642 		        NONE => pblterm dI pI

   643 		      | SOME t => subst_atomic ((vars_of_pbl_' ppc) ~~~ vals) t

   644         val f = subpbl (strip_thy dI) pI

   645       in

   646         if domID = dI andalso pblID = pI

   647         then Ass (Subproblem' ((dI, pI, mI), pors, hdl, fmz_, ctxt, f), f)

   648         else NotAss

   649       end

   651   | assod pt d m t =

   652       (if (!trace_script)

   653        then tracing("@@@ the 'tac_' proposed to apply does NOT match the leaf found in the script:\n"^

   654 		     "@@@ tac_ = "^(tac_2str m))

   655        else ();

   656        NotAss);

   658 fun tac_2tac (Refine_Tacitly' (pI,_,_,_,_)) = Refine_Tacitly pI

   659   | tac_2tac (Model_Problem' (pI,_,_))      = Model_Problem

   660   | tac_2tac (Add_Given' (t,_))             = Add_Given t

   661   | tac_2tac (Add_Find' (t,_))              = Add_Find t

   662   | tac_2tac (Add_Relation' (t,_))          = Add_Relation t

   664   | tac_2tac (Specify_Theory' dI)           = Specify_Theory dI

   665   | tac_2tac (Specify_Problem' (dI,_))      = Specify_Problem dI

   666   | tac_2tac (Specify_Method' (dI,_,_))     = Specify_Method dI

   668   | tac_2tac (Rewrite' (thy,rod,erls,put,(thmID,thm),f,(f',asm))) = Rewrite (thmID,thm)

   670   | tac_2tac (Rewrite_Inst' (thy,rod,erls,put,sub,(thmID,thm),f,(f',asm)))=

   671       Rewrite_Inst (subst2subs sub,(thmID,thm))

   673   | tac_2tac (Rewrite_Set' (thy,put,rls,f,(f',asm))) = Rewrite_Set (id_rls rls)

   674   | tac_2tac (Detail_Set' (thy,put,rls,f,(f',asm))) = Detail_Set (id_rls rls)

   676   | tac_2tac (Rewrite_Set_Inst' (thy,put,sub,rls,f,(f',asm))) =

   677       Rewrite_Set_Inst (subst2subs sub,id_rls rls)

   678   | tac_2tac (Detail_Set_Inst' (thy,put,sub,rls,f,(f',asm))) =

   679       Detail_Set_Inst (subst2subs sub,id_rls rls)

   681   | tac_2tac (Calculate' (thy,op_,t,(t',thm'))) = Calculate (op_)

   683   | tac_2tac (Check_elementwise' (consts,pred,consts')) = Check_elementwise pred

   685   | tac_2tac (Or_to_List' _) = Or_to_List

   686   | tac_2tac (Take' term) = Take (term2str term)

   687   | tac_2tac (Substitute' (_, _, subte, t, res)) = Substitute (subte2sube subte)

   689   | tac_2tac (Tac_ (_,f,id,f')) = Tac id

   691   | tac_2tac (Subproblem' ((domID, pblID, _), _, _, _,_ ,_)) = Subproblem (domID, pblID)

   692   | tac_2tac (Check_Postcond' (pblID, _)) = Check_Postcond pblID

   693   | tac_2tac Empty_Tac_ = Empty_Tac

   694   | tac_2tac m =

   695       error ("tac_2tac: not impl. for "^(tac_2str m));

   700 (** decompose tac_ to a rule and to (lhs,rhs)

   701     unly needed                          --- **)

   703 val idT = Type ("Script.ID",[]);

   704 (*val tt = (term_of o the o (parse thy)) "square_equation_left::ID";

   705 type_of tt = idT;

   706 val it = true : bool

   707 *)

   709 fun make_rule thy t =

   710   let val ct = cterm_of thy (Trueprop $ t)

   711   in Thm (Print_Mode.setmp [] (Syntax.string_of_term (thy2ctxt thy))

   712                            (term_of ct), make_thm ct) end;

   714 (* val (Rewrite_Inst'(thy',rod,rls,put,subs,(thmID,thm),f,(f',asm)))=m;

   715    *)

   716 (*decompose tac_ to a rule and to (lhs,rhs) for ets FIXME.12.03: obsolete!

   717  NOTE.12.03: also used for msg 'not locatable' ?!: 'Subproblem' missing !!!

   718 WN0508 only use in tac_2res, which uses only last return-value*)

   719 fun rep_tac_ (Rewrite_Inst'

   720 		 (thy',rod,rls,put,subs,(thmID,thm),f,(f',asm))) =

   721   let val fT = type_of f;

   722     val b = if put then HOLogic.true_const else HOLogic.false_const;

   723     val sT = (type_of o fst o hd) subs;

   724     val subs' = list2isalist (HOLogic.mk_prodT (sT, sT))

   725       (map HOLogic.mk_prod subs);

   726     val sT' = type_of subs';

   727     val lhs = Const ("Script.Rewrite'_Inst",[sT',idT,(*fT*)bool,fT] ---> fT)

   728       $ subs' $ Free (thmID,idT) $ b $ f;

   729   in (((make_rule (assoc_thy thy')) o HOLogic.mk_eq) (lhs,f'),(lhs,f')) end

   730 (*Fehlersuche 25.4.01

   731 (a)----- als String zusammensetzen:

   732 ML> term2str f;

   733 val it = "d_d x #4 + d_d x (x ^^^ #2 + #3 * x)" : string

   734 ML> term2str f';

   735 val it = "#0 + d_d x (x ^^^ #2 + #3 * x)" : string

   736 ML> subs;

   737 val it = [(Free ("bdv","RealDef.real"),Free ("x","RealDef.real"))] : subst

   738 > val tt = (term_of o the o (parse thy))

   739   "(Rewrite_Inst[(bdv,x)]diff_const False(d_d x #4 + d_d x (x ^^^ #2 + #3 * x)))=(#0 + d_d x (x ^^^ #2 + #3 * x))";

   740 > atomty tt;

   741 ML> tracing (term2str tt);

   742 (Rewrite_Inst [(bdv,x)] diff_const False d_d x #4 + d_d x (x ^^^ #2 + #3 * x)) =

   743  #0 + d_d x (x ^^^ #2 + #3 * x)

   745 (b)----- laut rep_tac_:

   746 > val ttt=HOLogic.mk_eq (lhs,f');

   747 > atomty ttt;

   750 (*Fehlersuche 1-2Monate vor 4.01:*)

   751 > val tt = (term_of o the o (parse thy))

   752   "Rewrite_Inst[(bdv,x)]square_equation_left True(x=#1+#2)";

   753 > atomty tt;

   755 > val f = (term_of o the o (parse thy)) "x=#1+#2";

   756 > val f' = (term_of o the o (parse thy)) "x=#3";

   757 > val subs = [((term_of o the o (parse thy)) "bdv",

   758 	       (term_of o the o (parse thy)) "x")];

   759 > val sT = (type_of o fst o hd) subs;

   760 > val subs' = list2isalist (HOLogic.mk_prodT (sT, sT))

   761 			      (map HOLogic.mk_prod subs);

   762 > val sT' = type_of subs';

   763 > val lhs = Const ("Script.Rewrite'_Inst",[sT',idT,fT,fT] ---> fT)

   764   $ subs' $ Free (thmID,idT) $ HOLogic.true_const $ f;

   765 > lhs = tt;

   766 val it = true : bool

   767 > rep_tac_ (Rewrite_Inst'

   768 	       ("Script","tless_true","eval_rls",false,subs,

   769 		("square_equation_left",""),f,(f',[])));

   770 *)

   771   | rep_tac_ (Rewrite' (thy',rod,rls,put,(thmID,thm),f,(f',asm)))=

   772   let

   773     val fT = type_of f;

   774     val b = if put then HOLogic.true_const else HOLogic.false_const;

   775     val lhs = Const ("Script.Rewrite",[idT,HOLogic.boolT,fT] ---> fT)

   776       $ Free (thmID,idT) $ b $ f;

   777   in (((make_rule (assoc_thy thy')) o HOLogic.mk_eq) (lhs,f'),(lhs,f')) end

   778 (*

   779 > val tt = (term_of o the o (parse thy)) (*____   ____..test*)

   780   "Rewrite square_equation_left True (x=#1+#2) = (x=#3)";

   782 > val f = (term_of o the o (parse thy)) "x=#1+#2";

   783 > val f' = (term_of o the o (parse thy)) "x=#3";

   784 > val Thm (id,thm) =

   785   rep_tac_ (Rewrite'

   786    ("Script","tless_true","eval_rls",false,

   787     ("square_equation_left",""),f,(f',[])));

   788 > val SOME ct = parse thy

   789   "Rewrite square_equation_left True (x=#1+#2)";

   790 > rewrite_ Script.thy tless_true eval_rls true thm ct;

   791 val it = SOME ("x = #3",[]) : (cterm * cterm list) option

   792 *)

   793   | rep_tac_ (Rewrite_Set_Inst'

   794 		 (thy',put,subs,rls,f,(f',asm))) =

   795     (e_rule, (e_term, f'))

   796 (*WN050824: type error ...

   797   let val fT = type_of f;

   798     val sT = (type_of o fst o hd) subs;

   799     val subs' = list2isalist (HOLogic.mk_prodT (sT, sT))

   800       (map HOLogic.mk_prod subs);

   801     val sT' = type_of subs';

   802     val b = if put then HOLogic.true_const else HOLogic.false_const

   803     val lhs = Const ("Script.Rewrite'_Set'_Inst",

   804 		     [sT',idT,fT,fT] ---> fT)

   805       $ subs' $ Free (id_rls rls,idT) $ b $ f;

   806   in (((make_rule (assoc_thy thy')) o HOLogic.mk_eq) (lhs,f'),(lhs,f')) end*)

   807 (* ... vals from Rewrite_Inst' ...

   808 > rep_tac_ (Rewrite_Set_Inst'

   809 	       ("Script",false,subs,

   810 		"isolate_bdv",f,(f',[])));

   811 *)

   812 (* val (Rewrite_Set' (thy',put,rls,f,(f',asm)))=m;

   813 *)

   814   | rep_tac_ (Rewrite_Set' (thy',put,rls,f,(f',asm)))=

   815   let val fT = type_of f;

   816     val b = if put then HOLogic.true_const else HOLogic.false_const;

   817     val lhs = Const ("Script.Rewrite'_Set",[idT,bool,fT] ---> fT)

   818       $ Free (id_rls rls,idT) $ b $ f;

   819   in (((make_rule (assoc_thy thy')) o HOLogic.mk_eq) (lhs,f'),(lhs,f')) end

   820 (* 13.3.01:

   821 val thy = assoc_thy thy';

   822 val t = HOLogic.mk_eq (lhs,f');

   823 make_rule thy t;

   824 --------------------------------------------------

   825 val lll = (term_of o the o (parse thy))

   826   "Rewrite_Set SqRoot_simplify False (d_d x (x ^^^ #2 + #3 * x) + d_d x #4)";

   828 --------------------------------------------------

   829 > val f = (term_of o the o (parse thy)) "x=#1+#2";

   830 > val f' = (term_of o the o (parse thy)) "x=#3";

   831 > val Thm (id,thm) =

   832   rep_tac_ (Rewrite_Set'

   833    ("Script",false,"SqRoot_simplify",f,(f',[])));

   834 val id = "(Rewrite_Set SqRoot_simplify True x = #1 + #2) = (x = #3)" : string

   835 val thm = "(Rewrite_Set SqRoot_simplify True x = #1 + #2) = (x = #3)" : thm

   836 *)

   837   | rep_tac_ (Calculate' (thy',op_,f,(f',thm')))=

   838   let val fT = type_of f;

   839     val lhs = Const ("Script.Calculate",[idT,fT] ---> fT)

   840       $ Free (op_,idT) $ f

   841   in (((make_rule (assoc_thy thy')) o HOLogic.mk_eq) (lhs,f'),(lhs,f')) end

   842 (*

   843 > val lhs'=(term_of o the o (parse thy))"Calculate plus (#1+#2)";

   844   ... test-root-equ.sml: calculate ...

   845 > val Appl m'=applicable_in p pt (Calculate "PLUS");

   846 > val (lhs,_)=tac_2etac m';

   847 > lhs'=lhs;

   848 val it = true : bool*)

   849   | rep_tac_ (Check_elementwise' (t,str,(t',asm)))  = (Erule, (e_term, t'))

   850   | rep_tac_ (Subproblem' (_, _, _, _, _, t'))  = (Erule, (e_term, t'))

   851   | rep_tac_ (Take' (t'))  = (Erule, (e_term, t'))

   852   | rep_tac_ (Substitute' (_, _, subst,t,t'))  = (Erule, (t, t'))

   853   | rep_tac_ (Or_to_List' (t, t'))  = (Erule, (t, t'))

   854   | rep_tac_ m = error ("rep_tac_: not impl.for "^

   855 				 (tac_2str m));

   857 (*"N.3.6.03------

   858 fun tac_2rule m = (fst o rep_tac_) m;

   859 fun tac_2etac m = (snd o rep_tac_) m;

   860 fun tac_2tac m = (fst o snd o rep_tac_) m;*)

   861 fun tac_2res m = (snd o snd o rep_tac_) m;(*ONLYuse of rep_tac_

   862 					        FIXXXXME: simplify rep_tac_*)

   865 (* handle a leaf at the end of recursive descent:

   866    a leaf is either a tactic or an 'expr' in "let v = expr"

   867    where "expr" does not contain a tactic.

   868    Handling a leaf comprises

   869    (1) 'subst_stacexpr' substitute env and complete curried tactic

   870    (2) rewrite the leaf by 'srls'

   871 *)

   872 fun handle_leaf call thy srls E a v t =

   873       (*WN050916 'upd_env_opt' is a blind copy from previous version*)

   874        case subst_stacexpr E a v t of

   875 	       (a', STac stac) => (*script-tactic*)

   876 	         let val stac' =

   877                eval_listexpr_ (assoc_thy thy) srls (subst_atomic (upd_env_opt E (a,v)) stac)

   878 	         in

   879              (if (!trace_script)

   880 	            then tracing ("@@@ "^call^" leaf '"^term2str t^"' ---> STac '"^term2str stac'^"'")

   881 	            else ();

   882 	            (a', STac stac'))

   883 	         end

   884        | (a', Expr lexpr) => (*leaf-expression*)

   885 	         let val lexpr' =

   886                eval_listexpr_ (assoc_thy thy) srls (subst_atomic (upd_env_opt E (a,v)) lexpr)

   887 	         in

   888              (if (!trace_script)

   889 	            then tracing("@@@ "^call^" leaf '"^term2str t^"' ---> Expr '"^term2str lexpr'^"'")

   890 	            else ();

   891 	            (a', Expr lexpr')) (*lexpr' is the value of the Expr*)

   892 	         end;

   895 (** locate an applicable stactic in a script **)

   897 datatype assoc = (*ExprVal in the sense of denotational semantics*)

   898   Assoc of     (*the stac is associated, strongly or weakly*)

   899   scrstate *       (*the current; returned for next_tac etc. outside ass* *)

   900   (step list)    (*list of steps done until associated stac found;

   901 	           initiated with the data for doing the 1st step,

   902                    thus the head holds these data further on,

   903 		   while the tail holds steps finished (incl.scrstate in ptree)*)

   904 | NasApp of   (*stac not associated, but applicable, ptree-node generated*)

   905   scrstate * (step list)

   906 | NasNap of     (*stac not associated, not applicable, nothing generated;

   907 	         for distinction in Or, for leaving iterations, leaving Seq,

   908 		 evaluate scriptexpressions*)

   909   term * env;

   910 fun assoc2str (Assoc     _) = "Assoc"

   911   | assoc2str (NasNap  _) = "NasNap"

   912   | assoc2str (NasApp _) = "NasApp";

   915 datatype asap = (*arg. of assy _only_ for distinction w.r.t. Or*)

   916   Aundef   (*undefined: set only by (topmost) Or*)

   917 | AssOnly  (*do not execute appl stacs - there could be an associated

   918 	     in parallel Or-branch*)

   919 | AssGen;  (*no Ass(Weak) found within Or, thus

   920              search for _applicable_ stacs, execute and generate pt*)

   921 (*this constructions doesnt allow arbitrary nesting of Or !!!*)

   924 (*assy, ass_up, astep_up scan for locate_gen in a script.

   925   search is clearly separated into (1)-(2):

   926   (1) assy is recursive descent;

   927   (2) ass_up resumes interpretation at a location somewhere in the script;

   928       astep_up does only get to the parentnode of the scriptexpr.

   929   consequence:

   930   * call of (2) means _always_ that in this branch below

   931     there was an appl.stac (Repeat, Or e1, ...) found by the previous step.

   932 *)

   933 fun assy ya (is as (E,l,a,v,S,b),ss) (Const ("HOL.Let",_) $ e $ (Abs (id,T,body))) =

   934       (case assy ya ((E , l@[L,R], a,v,S,b),ss) e of

   935 	       NasApp ((E',l,a,v,S,bb),ss) =>

   936 	         let

   937              val id' = mk_Free (id, T);

   938 	           val E' = upd_env E' (id', v);

   939 	         in assy ya ((E', l@[R,D], a,v,S,b),ss) body end

   940        | NasNap (v,E) =>

   941 	         let

   942              val id' = mk_Free (id, T);

   943 	           val E' = upd_env E (id', v);

   944 	         in assy ya ((E', l@[R,D], a,v,S,b),ss) body end

   945        | ay => ay)

   947   | assy (ya as (thy,ctxt,srls,_,_)) ((E,l,_,v,S,b),ss) (Const ("Script.While",_) $ c $ e $ a) =

   948       (if eval_true_ thy srls (subst_atomic (upd_env E (a,v)) c)

   949        then assy ya ((E, l@[L,R], SOME a,v,S,b),ss)  e

   950        else NasNap (v, E))

   951   | assy (ya as (thy,ctxt,srls,_,_)) ((E,l,a,v,S,b),ss) (Const ("Script.While",_) $ c $ e) =

   952       (if eval_true_ thy srls (subst_atomic (upd_env_opt E (a,v)) c)

   953        then assy ya ((E, l@[R], a,v,S,b),ss) e

   954        else NasNap (v, E))

   956   | assy (ya as (thy,ctxt,srls,_,_)) ((E,l,a,v,S,b),ss) (Const ("If",_) $ c $ e1 $ e2) =

   957       (if eval_true_ thy srls (subst_atomic (upd_env_opt E (a,v)) c)

   958        then assy ya ((E, l@[L,R], a,v,S,b),ss) e1

   959        else assy ya ((E, l@[  R], a,v,S,b),ss) e2)

   961   | assy ya ((E,l,_,v,S,b),ss) (Const ("Script.Try",_) $ e $ a) =

   962       (case assy ya ((E, l@[L,R], SOME a,v,S,b),ss) e of

   963          ay => ay)

   964   | assy ya ((E,l,a,v,S,b),ss) (Const ("Script.Try",_) $ e) =

   965       (case assy ya ((E, l@[R], a,v,S,b),ss) e of

   966          ay => ay)

   968   | assy ya ((E,l,_,v,S,b),ss) (Const ("Script.Seq",_) $e1 $ e2 $ a) =

   969       (case assy ya ((E, l@[L,L,R], SOME a,v,S,b),ss) e1 of

   970 	       NasNap (v, E) => assy ya ((E, l@[L,R], SOME a,v,S,b),ss) e2

   971        | NasApp ((E,_,_,v,_,_),ss) => assy ya ((E, l@[L,R], SOME a,v,S,b),ss) e2

   972        | ay => ay)

   973   | assy ya ((E,l,a,v,S,b),ss) (Const ("Script.Seq",_) $e1 $ e2) =

   974       (case assy ya ((E, l@[L,R], a,v,S,b),ss) e1 of

   975 	       NasNap (v, E) => assy ya ((E, l@[R], a,v,S,b),ss) e2

   976        | NasApp ((E,_,_,v,_,_),ss) => assy ya ((E, l@[R], a,v,S,b),ss) e2

   977        | ay => ay)

   979   | assy ya ((E,l,_,v,S,b),ss) (Const ("Script.Repeat",_) $ e $ a) =

   980       assy ya ((E,(l@[L,R]),SOME a,v,S,b),ss) e

   981   | assy ya ((E,l,a,v,S,b),ss) (Const ("Script.Repeat",_) $ e) =

   982       assy ya ((E,(l@[R]),a,v,S,b),ss) e

   984   | assy (y,x,s,sc,Aundef) ((E,l,_,v,S,b),ss) (Const ("Script.Or",_) $e1 $ e2 $ a) =

   985       (case assy (y,x,s,sc,AssOnly) ((E,(l@[L,L,R]),SOME a,v,S,b),ss) e1 of

   986 	       NasNap (v, E) =>

   987 	         (case assy (y,x,s,sc,AssOnly) ((E,(l@[L,R]),SOME a,v,S,b),ss) e2 of

   988 	            NasNap (v, E) =>

   989 	              (case assy (y,x,s,sc,AssGen) ((E,(l@[L,L,R]),SOME a,v,S,b),ss) e1 of

   990 	                 NasNap (v, E) =>

   991 	                   assy (y,x,s,sc,AssGen) ((E, (l@[L,R]), SOME a,v,S,b),ss) e2

   992 	               | ay => ay)

   993 	          | ay =>(ay))

   994        | NasApp _ => error ("assy: FIXXXME ///must not return NasApp///")

   995        | ay => (ay))

   996   | assy ya ((E,l,a,v,S,b),ss) (Const ("Script.Or",_) $e1 $ e2) =

   997       (case assy ya ((E,(l@[L,R]),a,v,S,b),ss) e1 of

   998 	       NasNap (v, E) => assy ya ((E,(l@[R]),a,v,S,b),ss) e2

   999        | ay => (ay))

  1001     (*here is not a tactical like TRY etc, but a tactic creating a step in calculation*)

  1002   | assy (thy',ctxt,sr,d,ap) (is as (E,l,a,v,S,b), (m,_,pt,(p,p_),c)::ss) t =

  1003       (case handle_leaf "locate" thy' sr E a v t of

  1004 	       (a', Expr s) =>

  1005 	          (NasNap (eval_listexpr_ (assoc_thy thy') sr

  1006 			     (subst_atomic (upd_env_opt E (a',v)) t), E))

  1007        | (a', STac stac) =>

  1008 	         let

  1009              val p' =

  1010                case p_ of Frm => p

  1011                | Res => lev_on p

  1012 			         | _ => error ("assy: call by " ^ pos'2str (p,p_));

  1013 	         in

  1014              case assod pt d m stac of

  1015 	             Ass (m,v') =>

  1016 	               let val (p'',c',f',pt') =

  1017                      generate1 (assoc_thy thy') m (ScrState (E,l,a',v',S,true), ctxt) (p',p_) pt;

  1018 	               in Assoc ((E,l,a',v',S,true), (m,f',pt',p'',c @ c')::ss) end

  1019              | AssWeak (m,v') =>

  1020 	               let val (p'',c',f',pt') =

  1021                    generate1 (assoc_thy thy') m (ScrState (E,l,a',v',S,false), ctxt) (p',p_) pt;

  1022 	               in Assoc ((E,l,a',v',S,false), (m,f',pt',p'',c @ c')::ss) end

  1023              | NotAss =>

  1024                  (case ap of   (*switch for Or: 1st AssOnly, 2nd AssGen*)

  1025                     AssOnly => (NasNap (v, E))

  1026                   | gen =>

  1027                       (case applicable_in (p,p_) pt (stac2tac pt (assoc_thy thy') stac) of

  1028 			                   Appl m' =>

  1029 			                     let

  1030                              val is = (E,l,a',tac_2res m',S,false(*FIXXXME.WN0?*))

  1031 			                       val (p'',c',f',pt') =

  1032 			                         generate1 (assoc_thy thy') m' (ScrState is, ctxt) (p',p_) pt;

  1033 			                     in NasApp (is,(m,f',pt',p'',c @ c')::ss) end

  1034 		                   | Notappl _ => (NasNap (v, E))

  1035 			                )

  1036 		             )

  1037            end);

  1039 fun ass_up (ys as (y,ctxt,s,Script sc,d)) (is as (E,l,a,v,S,b),ss) (Const ("HOL.Let",_) $ _) =

  1040       let

  1041         (*val _= tracing("### ass_up1 Let$e: is=")

  1042 	      val _= tracing(istate2str (ScrState is))*)

  1043 	      val l = drop_last l; (*comes from e, goes to Abs*)

  1044         val (Const ("HOL.Let",_) $ e $ (Abs (i,T,body))) = go l sc;

  1045         val i = mk_Free (i, T);

  1046         val E = upd_env E (i, v);

  1047         (*val _=tracing("### ass_up2 Let$e: E="^(subst2str E));*)

  1048        in case assy (y,ctxt,s,d,Aundef) ((E, l@[R,D], a,v,S,b),ss) body of

  1049 	          Assoc iss => Assoc iss

  1050 	        | NasApp iss => astep_up ys iss

  1051 	        | NasNap (v, E) => astep_up ys ((E,l,a,v,S,b),ss) end

  1053   | ass_up ys (iss as (is,_)) (Abs (_,_,_)) =

  1054       ((*tracing("### ass_up  Abs: is=");

  1055       tracing(istate2str (ScrState is));*)

  1056       astep_up ys iss) (*TODO 5.9.00: env ?*)

  1058   | ass_up ys (iss as (is,_)) (Const ("HOL.Let",_) $ e $ (Abs (i,T,b)))=

  1059       ((*tracing("### ass_up Let $ e $ Abs: is=");

  1060       tracing(istate2str (ScrState is));*)

  1061       astep_up ys iss) (*TODO 5.9.00: env ?*)

  1063   | ass_up ysa iss (Const ("Script.Seq",_) $ _ $ _ $ _) =

  1064       astep_up ysa iss (*all has been done in (*2*) below*)

  1066   | ass_up ysa iss (Const ("Script.Seq",_) $ _ $ _) =

  1067       astep_up ysa iss (*2*: comes from e2*)

  1069   | ass_up (ysa as (y,ctxt,s,Script sc,d)) (is as (E,l,a,v,S,b),ss)

  1070 	   (Const ("Script.Seq",_) $ _ ) = (*2*: comes from e1, goes to e2*)

  1071       let

  1072         val up = drop_last l;

  1073         val Const ("Script.Seq",_) $ _ $ e2 = go up sc

  1074         (*val _= tracing("### ass_up Seq$e: is=")

  1075         val _= tracing(istate2str (ScrState is))*)

  1076       in

  1077         case assy (y,ctxt,s,d,Aundef) ((E, up@[R], a,v,S,b),ss) e2 of

  1078           NasNap (v,E) => astep_up ysa ((E,up,a,v,S,b),ss)

  1079         | NasApp iss => astep_up ysa iss

  1080         | ay => ay end

  1082   | ass_up ysa iss (Const ("Script.Try",_) $ e $ _) =

  1083     astep_up ysa iss

  1085   (* val (ysa, iss, (Const ("Script.Try",_) $ e)) =

  1086 	 (ys,  ((E,up,a,v,S,b),ss), (go up sc));

  1087      *)

  1088   | ass_up ysa iss (Const ("Script.Try",_) $ e) =

  1089     ((*tracing("### ass_up Try $ e");*)

  1090      astep_up ysa iss)

  1092   | ass_up (ys as (y,ctxt,s,_,d)) ((E,l,_,v,S,b),ss)

  1093 	   (*(Const ("Script.While",_) $ c $ e $ a) = WN050930 blind fix*)

  1094 	   (t as Const ("Script.While",_) $ c $ e $ a) =

  1095     ((*tracing("### ass_up: While c= "^

  1096 	     (term2str (subst_atomic (upd_env E (a,v)) c)));*)

  1097      if eval_true_ y s (subst_atomic (upd_env E (a,v)) c)

  1098     then (case assy (y,ctxt,s,d,Aundef) ((E, l@[L,R], SOME a,v,S,b),ss) e of

  1099        NasNap (v,E') => astep_up ys ((E',l, SOME a,v,S,b),ss)

  1100      | NasApp ((E',l,a,v,S,b),ss) =>

  1101        ass_up ys ((E',l,a,v,S,b),ss) t (*WN050930 't' was not assigned*)

  1102      | ay => ay)

  1103     else astep_up ys ((E,l, SOME a,v,S,b),ss)

  1104 	 )

  1106   | ass_up (ys as (y,ctxt,s,_,d)) ((E,l,a,v,S,b),ss)

  1107 	   (*(Const ("Script.While",_) $ c $ e) = WN050930 blind fix*)

  1108 	   (t as Const ("Script.While",_) $ c $ e) =

  1109     if eval_true_ y s (subst_atomic (upd_env_opt E (a,v)) c)

  1110     then (case assy (y,ctxt,s,d,Aundef) ((E, l@[R], a,v,S,b),ss) e of

  1111        NasNap (v,E') => astep_up ys ((E',l, a,v,S,b),ss)

  1112      | NasApp ((E',l,a,v,S,b),ss) =>

  1113        ass_up ys ((E',l,a,v,S,b),ss) t (*WN050930 't' was not assigned*)

  1114      | ay => ay)

  1115     else astep_up ys ((E,l, a,v,S,b),ss)

  1117   | ass_up y iss (Const ("If",_) $ _ $ _ $ _) = astep_up y iss

  1119   | ass_up (ys as (y,ctxt,s,_,d)) ((E,l,_,v,S,b),ss)

  1120 	   (t as Const ("Script.Repeat",_) $ e $ a) =

  1121   (case assy (y,ctxt,s,d, Aundef) ((E, (l@[L,R]), SOME a,v,S,b),ss) e of

  1122        NasNap (v,E') => astep_up ys ((E',l, SOME a,v,S,b),ss)

  1123      | NasApp ((E',l,a,v,S,b),ss) =>

  1124        ass_up ys ((E',l,a,v,S,b),ss) t

  1125      | ay => ay)

  1127   | ass_up (ys as (y,ctxt,s,_,d)) (is as ((E,l,a,v,S,b),ss))

  1128 	   (t as Const ("Script.Repeat",_) $ e) =

  1129   (case assy (y,ctxt,s,d,Aundef) ((E, (l@[R]), a,v,S,b),ss) e of

  1130        NasNap (v', E') => astep_up ys ((E',l,a,v',S,b),ss)

  1131      | NasApp ((E',l,a,v',S,bb),ss) =>

  1132        ass_up ys ((E',l,a,v',S,b),ss) t

  1133      | ay => ay)

  1135   | ass_up y iss (Const ("Script.Or",_) $ _ $ _ $ _) = astep_up y iss

  1137   | ass_up y iss (Const ("Script.Or",_) $ _ $ _) = astep_up y iss

  1139   | ass_up y ((E,l,a,v,S,b),ss) (Const ("Script.Or",_) $ _ ) =

  1140     astep_up y ((E, (drop_last l), a,v,S,b),ss)

  1142   | ass_up y iss t =

  1143     error ("ass_up not impl for t= "^(term2str t))

  1144 (* 9.6.03

  1145    val (ys as (_,_,Script sc,_), ss) =

  1146        ((thy',srls,scr,d), [(m,EmptyMout,pt,p,[])]:step list);

  1147    astep_up ys ((E,l,a,v,S,b),ss);

  1148    val ((ys as (_,_,Script sc,_)), ((E,l,a,v,S,b),ss)) =

  1149        (ysa, iss);

  1150    val ((ys as (_,_,Script sc,_)), ((E,l,a,v,S,b),ss)) =

  1151        ((thy',srls,scr,d), ((E,l,a,v,S,b), [(m,EmptyMout,pt,p,[])]));

  1152    *)

  1153 and astep_up (ys as (_,_,_,Script sc,_)) ((E,l,a,v,S,b),ss) =

  1154   if 1 < length l

  1155     then

  1156       let val up = drop_last l;

  1157 	  (*val _= tracing("### astep_up: E= "^env2str E);*)

  1158       in ass_up ys ((E,up,a,v,S,b),ss) (go up sc) end

  1159   else (NasNap (v, E))

  1160 ;

  1166 (* use"ME/script.sml";

  1167    use"script.sml";

  1168  term2str (go up sc);

  1170    *)

  1172 (*check if there are tacs for rewriting only*)

  1173 fun rew_only ([]:step list) = true

  1174   | rew_only (((Rewrite' _          ,_,_,_,_))::ss) = rew_only ss

  1175   | rew_only (((Rewrite_Inst' _     ,_,_,_,_))::ss) = rew_only ss

  1176   | rew_only (((Rewrite_Set' _      ,_,_,_,_))::ss) = rew_only ss

  1177   | rew_only (((Rewrite_Set_Inst' _ ,_,_,_,_))::ss) = rew_only ss

  1178   | rew_only (((Calculate' _        ,_,_,_,_))::ss) = rew_only ss

  1179   | rew_only (((Begin_Trans' _      ,_,_,_,_))::ss) = rew_only ss

  1180   | rew_only (((End_Trans' _        ,_,_,_,_))::ss) = rew_only ss

  1181   | rew_only _ = false;

  1184 datatype locate =

  1185   Steps of istate      (*producing hd of step list (which was latest)

  1186 	                 for next_tac, for reporting Safe|Unsafe to DG*)

  1187 	   * step      (*(scrstate producing this step is in ptree !)*)

  1188 		 list  (*locate_gen may produce intermediate steps*)

  1189 | NotLocatable;        (*no (m Ass m') or (m AssWeak m') found*)

  1193 (* locate_gen tries to locate an input tac m in the script.

  1194    pursuing this goal the script is executed until an (m' equiv m) is found,

  1195    or the end of the script

  1196 args

  1197    m   : input by the user, already checked by applicable_in,

  1198          (to be searched within Or; and _not_ an m doing the step on ptree !)

  1199    p,pt: (incl ets) at the time of input

  1200    scr : the script

  1201    d   : canonical simplifier for locating Take, Substitute, Subproblems etc.

  1202    ets : ets at the time of input

  1203    l   : the location (in scr) of the stac which generated the current formula

  1204 returns

  1205    Steps: pt,p (incl. ets) with m done

  1206           pos' list of proofobjs cut (from generate)

  1207           safe: implied from last proofobj

  1208 	  ets:

  1209    ///ToDo : ets contains a list of tacs to be done before m can be done

  1210           NOT IMPL. -- "error: do other step before"

  1211    NotLocatable: thus generate_hard

  1212 *)

  1213 fun locate_gen (thy',g_) (Rewrite'(_,ro,er,pa,(id,str),f,_)) (pt,p)

  1214 	  (Rfuns {locate_rule=lo,...}, d) (RrlsState (_,f'',rss,rts), ctxt) =

  1215       (case lo rss f (Thm (id, mk_thm (assoc_thy thy') str)) of

  1216 	       [] => NotLocatable

  1217        | rts' =>

  1218 	         Steps (rts2steps [] ((pt,p),(f,f'',rss,rts),(thy',ro,er,pa)) rts'))

  1220   | locate_gen (thy',srls) (m:tac_) ((pt,p):ptree * pos')

  1221 	  (scr as Script (h $ body),d) (ScrState (E,l,a,v,S,b), ctxt)  =

  1222       let val thy = assoc_thy thy';

  1223       in

  1224         case if l = [] orelse ((*init.in solve..Apply_Method...*)

  1225 			         (last_elem o fst) p = 0 andalso snd p = Res)

  1226 	           then (assy (thy',ctxt,srls,d,Aundef) ((E,[R],a,v,S,b), [(m,EmptyMout,pt,p,[])]) body)

  1227 	           else (astep_up (thy',ctxt,srls,scr,d) ((E,l,a,v,S,b), [(m,EmptyMout,pt,p,[])]) ) of

  1228 	        Assoc (iss as (is as (_,_,_,_,_,strong_ass), ss as ((m',f',pt',p',c')::_))) =>

  1229 	          (if strong_ass

  1230              then

  1231               (Steps (ScrState is, ss))

  1232 	         else

  1233                if rew_only ss (*andalso 'not strong_ass'= associated weakly*)

  1234 	             then

  1235                  let

  1236                    val (po,p_) = p

  1237                    val po' = case p_ of Frm => po | Res => lev_on po

  1238                    val (p'',c'',f'',pt'') =

  1239 		                 generate1 thy m (ScrState is, ctxt) (po',p_) pt;

  1240 	               in Steps (ScrState is, [(m, f'',pt'',p'',c'')]) end

  1241 	             else Steps (ScrState is, ss))

  1243         | NasApp _ => NotLocatable

  1244         | err => error ("not-found-in-script: NotLocatable from " ^ PolyML.makestring err)      end

  1246   | locate_gen _ m _ (sc,_) (is, _) =

  1247       error ("locate_gen: wrong arguments,\n tac= " ^ tac_2str m ^ ",\n " ^

  1248 		    "scr= " ^ scr2str sc ^ ",\n istate= " ^ istate2str is);

  1250 (** find the next stactic in a script **)

  1252 datatype appy =  (*ExprVal in the sense of denotational semantics*)

  1253     Appy of      (*applicable stac found, search stalled*)

  1254     tac_ *       (*tac_ associated (fun assod) with stac*)

  1255     scrstate     (*after determination of stac WN.18.8.03*)

  1256   | Napp of      (*stac found was not applicable;

  1257 	           this mode may become Skip in Repeat, Try and Or*)

  1258     env (*stack*)  (*popped while nxt_up*)

  1259   | Skip of      (*for restart after Appy, for leaving iterations,

  1260 	           for passing the value of scriptexpressions,

  1261 		   and for finishing the script successfully*)

  1262     term * env (*stack*);

  1264 (*appy, nxt_up, nstep_up scanning for next_tac.

  1265   search is clearly separated into (1)-(2):

  1266   (1) appy is recursive descent;

  1267   (2) nxt_up resumes interpretation at a location somewhere in the script;

  1268       nstep_up does only get to the parentnode of the scriptexpr.

  1269   consequence:

  1270   * call of (2) means _always_ that in this branch below

  1271     there was an applicable stac (Repeat, Or e1, ...)

  1272 *)

  1275 datatype appy_ = (*as argument in nxt_up, nstep_up, from appy*)

  1276   (* Appy          is only (final) returnvalue, not argument during search *)

  1277      Napp_       (*ev. detects 'script is not appropriate for this example'*)

  1278    | Skip_;      (*detects 'script successfully finished'

  1279 		               also used as init-value for resuming; this works,

  1280 	                 because 'nxt_up Or e1' treats as Appy*)

  1282 fun appy thy ptp E l (t as Const ("HOL.Let",_) $ e $ (Abs (i,T,b))) a v =

  1283       (case appy thy ptp E (l@[L,R]) e a v of

  1284          Skip (res, E) =>

  1285            let val E' = upd_env E (Free (i,T), res);

  1286            in appy thy ptp E' (l@[R,D]) b a v end

  1287        | ay => ay)

  1289   | appy (thy as (th,sr)) ptp E l (t as Const ("Script.While"(*1*),_) $ c $ e $ a) _ v =

  1290       (if eval_true_ th sr (subst_atomic (upd_env E (a,v)) c)

  1291        then appy thy ptp E (l@[L,R]) e (SOME a) v

  1292        else Skip (v, E))

  1294   | appy (thy as (th,sr)) ptp E l (t as Const ("Script.While"(*2*),_) $ c $ e) a v =

  1295       (if eval_true_ th sr (subst_atomic (upd_env_opt E (a,v)) c)

  1296        then appy thy ptp E (l@[R]) e a v

  1297        else Skip (v, E))

  1299   | appy (thy as (th,sr)) ptp E l (t as Const ("If",_) $ c $ e1 $ e2) a v =

  1300       (if eval_true_ th sr (subst_atomic (upd_env_opt E (a,v)) c)

  1301        then ((*tracing("### appy If: true");*)appy thy ptp E (l@[L,R]) e1 a v)

  1302        else ((*tracing("### appy If: false");*)appy thy ptp E (l@[  R]) e2 a v))

  1304   | appy thy ptp E l (Const ("Script.Repeat"(*1*),_) $ e $ a) _ v =

  1305       (appy thy ptp E (l@[L,R]) e (SOME a) v)

  1307   | appy thy ptp E l (Const ("Script.Repeat"(*2*),_) $ e) a v =

  1308       (appy thy ptp E (l@[R]) e a v)

  1310   | appy thy ptp E l (t as Const ("Script.Try",_) $ e $ a) _ v =

  1311      (case appy thy ptp E (l@[L,R]) e (SOME a) v of

  1312         Napp E => (Skip (v, E))

  1313       | ay => ay)

  1315   | appy thy ptp E l(t as Const ("Script.Try",_) $ e) a v =

  1316      (case appy thy ptp E (l@[R]) e a v of

  1317         Napp E => (Skip (v, E))

  1318       | ay => ay)

  1320   | appy thy ptp E l (Const ("Script.Or"(*1*),_) $e1 $ e2 $ a) _ v =

  1321      (case appy thy ptp E (l@[L,L,R]) e1 (SOME a) v of

  1322 	      Appy lme => Appy lme

  1323       | _ => appy thy ptp E (*env*) (l@[L,R]) e2 (SOME a) v)

  1325   | appy thy ptp E l (Const ("Script.Or"(*2*),_) $e1 $ e2) a v =

  1326       (case appy thy ptp E (l@[L,R]) e1 a v of

  1327 	       Appy lme => Appy lme

  1328        | _ => appy thy ptp E (l@[R]) e2 a v)

  1330   | appy thy ptp E l (Const ("Script.Seq"(*1*),_) $ e1 $ e2 $ a) _ v =

  1331       (case appy thy ptp E (l@[L,L,R]) e1 (SOME a) v of

  1332 	       Skip (v,E) => appy thy ptp E (l@[L,R]) e2 (SOME a) v

  1333        | ay => ay)

  1335   | appy thy ptp E l (Const ("Script.Seq",_) $ e1 $ e2) a v =

  1336       (case appy thy ptp E (l@[L,R]) e1 a v of

  1337 	       Skip (v,E) => appy thy ptp E (l@[R]) e2 a v

  1338        | ay => ay)

  1340   (* a leaf has been found *)

  1341   | appy (thy as (th,sr)) (pt, p) E l t a v =

  1342       (case handle_leaf "next  " th sr E a v t of

  1343 	       (a', Expr s) => Skip (s, E)

  1344        | (a', STac stac) =>

  1345 	         let val (m,m') = stac2tac_ pt (assoc_thy th) stac

  1346            in

  1347              case m of

  1348 	             Subproblem _ => Appy (m', (E,l,a',tac_2res m',Sundef,false))

  1349 	           | _ =>

  1350                (case applicable_in p pt m of

  1351 			            Appl m' => (Appy (m', (E,l,a',tac_2res m',Sundef,false)))

  1352 		         | _ => ((*tracing("### appy: Napp");*)Napp E))

  1353 	         end);

  1355 fun nxt_up thy ptp (scr as (Script sc)) E l ay

  1356     (t as Const ("HOL.Let",_) $ _) a v = (*comes from let=...*)

  1357        (if ay = Napp_

  1358         then nstep_up thy ptp scr E (drop_last l) Napp_ a v

  1359         else (*Skip_*)

  1360 	        let

  1361             val up = drop_last l;

  1362 	          val (Const ("HOL.Let",_) $ e $ (Abs (i,T,body))) = go up sc;

  1363             val i = mk_Free (i, T);

  1364             val E = upd_env E (i, v);

  1365           in

  1366             case appy thy ptp E (up@[R,D]) body a v  of

  1367 	            Appy lre => Appy lre

  1368 	          | Napp E => nstep_up thy ptp scr E up Napp_ a v

  1369 	          | Skip (v,E) => nstep_up thy ptp scr E up Skip_ a v end)

  1371   | nxt_up thy ptp scr E l ay

  1372     (t as Abs (_,_,_)) a v =

  1373     ((*tracing("### nxt_up Abs: " ^ term2str t);*)

  1374      nstep_up thy ptp scr E (*enr*) l ay a v)

  1376   | nxt_up thy ptp scr E l ay

  1377     (t as Const ("HOL.Let",_) $ e $ (Abs (i,T,b))) a v =

  1378     ((*tracing("### nxt_up Let$e$Abs: is=");

  1379      tracing(istate2str (ScrState (E,l,a,v,Sundef,false)));*)

  1380      (*tracing("### nxt_up Let e Abs: " ^ term2str t);*)

  1381      nstep_up thy ptp scr (*upd_env*) E (*a,v)*)

  1382 	      (*eno,upd_env env (iar,res),iar,res,saf*) l ay a v)

  1384   (*no appy_: never causes Napp -> Helpless*)

  1385   | nxt_up (thy as (th,sr)) ptp scr E l _

  1386   (Const ("Script.While"(*1*),_) $ c $ e $ _) a v =

  1387   if eval_true_ th sr (subst_atomic (upd_env_opt E (a,v)) c)

  1388     then case appy thy ptp E (l@[L,R]) e a v of

  1389 	     Appy lr => Appy lr

  1390 	   | Napp E => nstep_up thy ptp scr E l Skip_ a v

  1391 	   | Skip (v,E) => nstep_up thy ptp scr E l Skip_ a v

  1392   else nstep_up thy ptp scr E l Skip_ a v

  1394   (*no appy_: never causes Napp - Helpless*)

  1395   | nxt_up (thy as (th,sr)) ptp scr E l _

  1396   (Const ("Script.While"(*2*),_) $ c $ e) a v =

  1397   if eval_true_ th sr (subst_atomic (upd_env_opt E (a,v)) c)

  1398     then case appy thy ptp E (l@[R]) e a v of

  1399 	     Appy lr => Appy lr

  1400 	   | Napp E => nstep_up thy ptp scr E l Skip_ a v

  1401 	   | Skip (v,E) => nstep_up thy ptp scr E l Skip_ a v

  1402   else nstep_up thy ptp scr E l Skip_ a v

  1404 (* val (scr, l) = (Script sc, up);

  1405    *)

  1406   | nxt_up thy ptp scr E l ay (Const ("If",_) $ _ $ _ $ _) a v =

  1407     nstep_up thy ptp scr E l ay a v

  1409   | nxt_up thy ptp scr E l _ (*no appy_: there was already a stac below*)

  1410   (Const ("Script.Repeat"(*1*),T) $ e $ _) a v =

  1411     (case appy thy ptp (*upd_env*) E (*a,v)*) ((l@[L,R]):loc_) e a v  of

  1412       Appy lr => Appy lr

  1413     | Napp E => ((*tracing("### nxt_up Repeat a: ");*)

  1414 		 nstep_up thy ptp scr E l Skip_ a v)

  1415     | Skip (v,E) => ((*tracing("### nxt_up Repeat: Skip res ="^

  1416 		(Sign.string_of_term(sign_of (assoc_thy thy)) res'));*)

  1417 		    nstep_up thy ptp scr E l Skip_ a v))

  1419   | nxt_up thy ptp scr E l _ (*no appy_: there was already a stac below*)

  1420   (Const ("Script.Repeat"(*2*),T) $ e) a v =

  1421     (case appy thy ptp (*upd_env*) E (*a,v)*) ((l@[R]):loc_) e a v  of

  1422       Appy lr => Appy lr

  1423     | Napp E => ((*tracing("### nxt_up Repeat a: ");*)

  1424 		 nstep_up thy ptp scr E l Skip_ a v)

  1425     | Skip (v,E) => ((*tracing("### nxt_up Repeat: Skip res ="^

  1426 		(Sign.string_of_term(sign_of (assoc_thy thy)) res'));*)

  1427 		    nstep_up thy ptp scr E l Skip_ a v))

  1428 (* val (thy, ptp, scr, E, l,   _,(t as Const ("Script.Try",_) $ e $ _), a, v) =

  1429        (thy, ptp, (Script sc),

  1430 	               E, up, ay,(go up sc),                            a, v);

  1431    *)

  1432   | nxt_up thy ptp scr E l _ (*makes Napp to Skip*)

  1433   (t as Const ("Script.Try",_) $ e $ _) a v =

  1434     ((*tracing("### nxt_up Try " ^ term2str t);*)

  1435      nstep_up thy ptp scr E l Skip_ a v )

  1436 (* val (thy, ptp, scr, E, l,   _,(t as Const ("Script.Try",_) $ e), a, v) =

  1437        (thy, ptp, (Script sc),

  1438 	               E, up, ay,(go up sc),                        a, v);

  1439    *)

  1440   | nxt_up thy ptp scr E l _ (*makes Napp to Skip*)

  1441   (t as Const ("Script.Try"(*2*),_) $ e) a v =

  1442     ((*tracing("### nxt_up Try " ^ term2str t);*)

  1443      nstep_up thy ptp scr E l Skip_ a v)

  1446   | nxt_up thy ptp scr E l ay

  1447   (Const ("Script.Or",_) $ _ $ _ $ _) a v = nstep_up thy ptp scr E l ay a v

  1449   | nxt_up thy ptp scr E l ay

  1450   (Const ("Script.Or",_) $ _ $ _) a v = nstep_up thy ptp scr E l ay a v

  1452   | nxt_up thy ptp scr E l ay

  1453   (Const ("Script.Or",_) $ _ ) a v =

  1454     nstep_up thy ptp scr E (drop_last l) ay a v

  1455 (* val (thy, ptp, scr, E, l, ay, (Const ("Script.Seq",_) $ _ $ _ $ _), a, v) =

  1456        (thy, ptp, (Script sc),

  1457 		       E, up, ay,(go up sc),                           a, v);

  1458    *)

  1459   | nxt_up thy ptp scr E l ay (*all has been done in (*2*) below*)

  1460   (Const ("Script.Seq"(*1*),_) $ _ $ _ $ _) a v =

  1461     nstep_up thy ptp scr E l ay a v

  1462 (* val (thy, ptp, scr, E, l, ay, (Const ("Script.Seq",_) $ _ $ e2), a, v) =

  1463        (thy, ptp, (Script sc),

  1464 		       E, up, ay,(go up sc),                        a, v);

  1465    *)

  1466   | nxt_up thy ptp scr E l ay (*comes from e2*)

  1467 	   (Const ("Script.Seq"(*2*),_) $ _ $ e2) a v =

  1468     nstep_up thy ptp scr E l ay a v

  1469 (* val (thy, ptp, scr, E, l, ay, (Const ("Script.Seq",_) $ _), a, v) =

  1470        (thy, ptp, (Script sc),

  1471 		       E, up, ay,(go up sc),                   a, v);

  1472    *)

  1473   | nxt_up thy ptp (scr as Script sc) E l ay (*comes from e1*)

  1474 	   (Const ("Script.Seq",_) $ _) a v =

  1475     if ay = Napp_

  1476     then nstep_up thy ptp scr E (drop_last l) Napp_ a v

  1477     else (*Skip_*)

  1478 	let val up = drop_last l;

  1479 	    val Const ("Script.Seq"(*2*),_) $ _ $ e2 = go up sc;

  1480 	in case appy thy ptp E (up@[R]) e2 a v  of

  1481 	    Appy lr => Appy lr

  1482 	  | Napp E => nstep_up thy ptp scr E up Napp_ a v

  1483 	  | Skip (v,E) => nstep_up thy ptp scr E up Skip_ a v end

  1485   | nxt_up (thy,_) ptp scr E l ay t a v =

  1486     error ("nxt_up not impl for " ^ term2str t)

  1488 (* val (thy, ptp, (Script sc), E, l, ay,    a, v)=

  1489        (thy, ptp, scr,         E, l, Skip_, a, v);

  1490    val (thy, ptp, (Script sc), E, l, ay,    a, v)=

  1491        (thy, ptp, sc,          E, l, Skip_, a, v);

  1492    *)

  1493 and nstep_up thy ptp (Script sc) E l ay a v =

  1494   (if 1 < length l

  1495    then

  1496      let val up = drop_last l;

  1497      in (nxt_up thy ptp (Script sc) E up ay (go up sc) a v ) end

  1498    else (*interpreted to end*)

  1499      if ay = Skip_ then Skip (v, E) else Napp E

  1500 );

  1502 (* decide for the next applicable stac in the script;

  1503    returns (stactic, value) - the value in case the script is finished

  1504    12.8.02:         ~~~~~ and no assumptions ??? FIXME ???

  1505    20.8.02: must return p in case of finished, because the next script

  1506             consulted need not be the calling script:

  1507             in case of detail ie. _inserted_ PrfObjs, the next stac

  1508             has to searched in a script with PblObj.status<>Complete !

  1509             (.. not true for other details ..PrfObj ??????????????????

  1510    20.8.02: do NOT return safe (is only changed in locate !!!)

  1511 *)

  1512 fun next_tac (thy,_) (pt,p) (Rfuns {next_rule,...}) (RrlsState(f,f',rss,_), ctxt) =

  1513         if f = f'

  1514         then (End_Detail' (f',[])(*8.6.03*), (Uistate, ctxt),

  1515   		    (f', Sundef(*FIXME is no value of next_tac! vor 8.6.03*)))  (*finished*)

  1516         else

  1517           (case next_rule rss f of

  1518   	         NONE => (Empty_Tac_, (Uistate, ctxt), (e_term, Sundef))  (*helpless*)

  1519   	       | SOME (Thm (id,thm))(*8.6.03: muss auch f' liefern ?!!*) =>

  1520   	          (Rewrite' (thy, "e_rew_ord", e_rls,(*!?!8.6.03*) false,

  1521   			       (id, string_of_thmI thm), f,(e_term,[(*!?!8.6.03*)])),

  1522   	           (Uistate, ctxt), (e_term, Sundef)))                    (*next stac*)

  1524   | next_tac thy (ptp as (pt, pos as (p, _)):ptree * pos') (sc as Script (h $ body))

  1525 	  (ScrState (E,l,a,v,s,b), ctxt) =

  1526         (case if l = []

  1527               then appy thy ptp E [R] body NONE v

  1528               else nstep_up thy ptp sc E l Skip_ a v of

  1529             Skip (v, _) =>                                            (*finished*)

  1530               (case par_pbl_det pt p of

  1531 	               (true, p', _) =>

  1532 	                  let val (_,pblID,_) = get_obj g_spec pt p';

  1533 	                  in (Check_Postcond' (pblID, (v, [(*assigned in next step*)])),

  1534 	                    (e_istate, ctxt), (v,s))

  1535                     end

  1536 	             | (_, p', rls') =>

  1537                    (End_Detail' (e_term,[])(*8.6.03*), (e_istate, ctxt), (v,s)))

  1538          | Napp _ => (Empty_Tac_, (e_istate, ctxt), (e_term, Sundef)) (*helpless*)

  1539          | Appy (m', scrst as (_,_,_,v,_,_)) =>

  1540              (m', (ScrState scrst, ctxt), (v, Sundef)))               (*next stac*)

  1542   | next_tac _ _ _ (is, _) = error ("next_tac: not impl for " ^ (istate2str is));

  1545 (*.create the initial interpreter state from the items of the guard.*)

  1546 fun init_scrstate thy itms metID =

  1547   let

  1548     val actuals = itms2args thy metID itms

  1549 	  val scr as Script sc = (#scr o get_met) metID

  1550     val formals = formal_args sc

  1551 	  (*expects same sequence of (actual) args in itms and (formal) args in met*)

  1552 	  fun relate_args env [] [] = env

  1553 	    | relate_args env _ [] =

  1554 	        error ("ERROR in creating the environment for '" ^

  1555 			    id_of_scr sc ^ "' from \nthe items of the guard of " ^

  1556 			    metID2str metID ^ ",\n" ^

  1557 			    "formal arg(s), from the script, miss actual arg(s), from the guards env:\n" ^

  1558 			    (string_of_int o length) formals ^

  1559 			    " formals: " ^ terms2str formals ^ "\n" ^

  1560 			    (string_of_int o length) actuals ^

  1561 			    " actuals: " ^ terms2str actuals)

  1562 	    | relate_args env [] actual_finds = env (*may drop Find!*)

  1563 	    | relate_args env (a::aa) (f::ff) =

  1564 	        if type_of a = type_of f

  1565 	        then relate_args (env @ [(a, f)]) aa ff

  1566           else

  1567 	          error ("ERROR in creating the environment for '" ^

  1568 			      id_of_scr sc ^ "' from \nthe items of the guard of " ^

  1569 			      metID2str metID ^ ",\n" ^

  1570 			      "different types of formal arg, from the script, " ^

  1571 			      "and actual arg, from the guards env:'\n" ^

  1572 			      "formal: '" ^ term2str a ^ "::" ^ (type2str o type_of) a ^ "'\n" ^

  1573 			      "actual: '" ^ term2str f ^ "::" ^ (type2str o type_of) f ^ "'\n" ^

  1574 			      "in\n" ^

  1575 			      "formals: " ^ terms2str formals ^ "\n" ^

  1576 			      "actuals: " ^ terms2str actuals)

  1577      val env = relate_args [] formals actuals;

  1578      val ctxt = ProofContext.init_global thy |> declare_constraints' actuals

  1579      val {pre, prls, ...} = get_met metID;

  1580      val pres = check_preconds thy prls pre itms |> map snd;

  1581      val ctxt = ctxt |> insert_assumptions pres;

  1582    in (ScrState (env,[],NONE,e_term,Safe,true), ctxt, scr):istate * Proof.context * scr end;

  1584 (* decide, where to get script/istate from:

  1585    (*1*) from PblObj.env: at begin of script if no init_form

  1586    (*2*) from PblObj/PrfObj: if stac is in the middle of the script

  1587    (*3*) from rls/PrfObj: in case of detail a ruleset *)

  1588 fun from_pblobj_or_detail' thy' (p,p_) pt =

  1589   let val ctxt = get_ctxt pt (p,p_)

  1590   in

  1591     if member op = [Pbl,Met] p_

  1592     then case get_obj g_env pt p of

  1593   	       NONE => error "from_pblobj_or_detail': no istate"

  1594   	     | SOME is =>

  1595   	         let

  1596                val metID = get_obj g_metID pt p

  1597   		         val {srls,...} = get_met metID

  1598   	         in (srls, is, (#scr o get_met) metID) end

  1599     else

  1600       let val (pbl,p',rls') = par_pbl_det pt p

  1601       in if pbl

  1602          then                                                    (*2*)

  1603   	       let

  1604              val thy = assoc_thy thy'

  1605   	         val PblObj{meth=itms,...} = get_obj I pt p'

  1606 	           val metID = get_obj g_metID pt p'

  1607 	           val {srls,...} = get_met metID

  1608 	         in (*if last_elem p = 0 nothing written to pt yet*)

  1609 	           (srls, get_loc pt (p,p_), (#scr o get_met) metID)

  1610 	         end

  1611          else                                                    (*3*)

  1612 	         (e_rls, (*FIXME.WN0?: get from pbl or met !!! unused for Rrls in locate_gen, next_tac*)

  1613 	          get_loc pt (p,p_),

  1614 	            case rls' of

  1615 	  	          Rls {scr=scr,...} => scr

  1616 	            | Seq {scr=scr,...} => scr

  1617 	            | Rrls {scr=rfuns,...} => rfuns)

  1618       end

  1619   end;

  1621 (*.get script and istate from PblObj, see                        (*1*) above.*)

  1622 fun from_pblobj' thy' (p,p_) pt =

  1623   let

  1624     val p' = par_pblobj pt p

  1625 	  val thy = assoc_thy thy'

  1626 	  val PblObj {meth=itms, ...} = get_obj I pt p'

  1627 	  val metID = get_obj g_metID pt p'

  1628 	  val {srls,scr,...} = get_met metID

  1629   in

  1630     if last_elem p = 0 (*nothing written to pt yet*)

  1631     then

  1632        let val (is, ctxt, scr) = init_scrstate thy itms metID

  1633 	     in (srls, (is, ctxt), scr) end

  1634        else (srls, get_loc pt (p,p_), scr)

  1635     end;

  1637 (*.get the stactics and problems of a script as tacs

  1638   instantiated with the current environment;

  1639   l is the location which generated the given formula.*)

  1640 (*WN.12.5.03: quick-and-dirty repair for listexpressions*)

  1641 fun is_spec_pos Pbl = true

  1642   | is_spec_pos Met = true

  1643   | is_spec_pos _ = false;

  1645 (*. fetch _all_ tactics from script .*)

  1646 fun sel_rules _ (([],Res):pos') =

  1647     raise PTREE "no tactics applicable at the end of a calculation"

  1648 | sel_rules pt (p,p_) =

  1649   if is_spec_pos p_

  1650   then [get_obj g_tac pt p]

  1651   else

  1652     let val pp = par_pblobj pt p;

  1653 	val thy' = (get_obj g_domID pt pp):theory';

  1654 	val thy = assoc_thy thy';

  1655 	val metID = get_obj g_metID pt pp;

  1656 	val metID' =if metID =e_metID then(thd3 o snd3)(get_obj g_origin pt pp)

  1657 		     else metID

  1658 	val {scr=Script sc,srls,...} = get_met metID'

  1659 	val ScrState (env,_,a,v,_,_) = get_istate pt (p,p_);

  1660     in map ((stac2tac pt thy) o rep_stacexpr o #2 o

  1661 	    (handle_leaf "selrul" thy' srls env a v)) (stacpbls sc) end;

  1662 (*

  1663 > val Script sc = (#scr o get_met) ("SqRoot","sqrt-equ-test");

  1664 > val env = [((term_of o the o (parse (Thy_Info.get_theory "Isac"))) "bdv",

  1665              (term_of o the o (parse (Thy_Info.get_theory "Isac"))) "x")];

  1666 > map ((stac2tac pt thy) o #2 o(subst_stacexpr env NONE e_term)) (stacpbls sc);

  1667 *)

  1670 (*. fetch tactics from script and filter _applicable_ tactics;

  1671     in case of Rewrite_Set* go down to _atomic_ rewrite-tactics .*)

  1672 fun sel_appl_atomic_tacs _ (([],Res):pos') =

  1673     raise PTREE "no tactics applicable at the end of a calculation"

  1674   | sel_appl_atomic_tacs pt (p,p_) =

  1675     if is_spec_pos p_

  1676     then [get_obj g_tac pt p]

  1677     else

  1678 	let val pp = par_pblobj pt p

  1679 	    val thy' = (get_obj g_domID pt pp):theory'

  1680 	    val thy = assoc_thy thy'

  1681 	    val metID = get_obj g_metID pt pp

  1682 	    val metID' =if metID = e_metID

  1683 			then (thd3 o snd3) (get_obj g_origin pt pp)

  1684 			else metID

  1685 	    val {scr=Script sc,srls,erls,rew_ord'=ro,...} = get_met metID'

  1686 	    val ScrState (env,_,a,v,_,_) = get_istate pt (p,p_)

  1687 	    val alltacs = (*we expect at least 1 stac in a script*)

  1688 		map ((stac2tac pt thy) o rep_stacexpr o #2 o

  1689 		     (handle_leaf "selrul" thy' srls env a v)) (stacpbls sc)

  1690 	    val f = case p_ of

  1691 			Frm => get_obj g_form pt p

  1692 		      | Res => (fst o (get_obj g_result pt)) p

  1693 	(*WN071231 ? replace atomic_appl_tacs with applicable_in (ineff!) ?*)

  1694 	in (distinct o flat o

  1695 	    (map (atomic_appl_tacs thy ro erls f))) alltacs end;

  1698 (*

  1699 end

  1700 open Interpreter;

  1701 *)

  1703 (* use"ME/script.sml";

  1704    use"script.sml";

  1705    *)

author	Walther Neuper <neuper@ist.tugraz.at>
	Sat, 10 Mar 2012 09:41:09 +0100
changeset 42387	767debe8a50c
parent 42362	b611f3c17af4
child 42394	977788dfed26
permissions	-rw-r--r--