(* Title: tests for Interpret/ptyps.sml

   Author: Walther Neuper 010916

   (c) due to copyright terms

*)

"-----------------------------------------------------------------";

"table of contents -----------------------------------------------";

"-----------------------------------------------------------------";

"-ptyps.thy: store test-pbtyps by 'setup' ------------------------";

"----------- testdata for refin, refine_ori ----------------------";

(*"----------- refin test-pbtyps -------requires 'setup'------------";*)

"----------- refine_ori test-pbtyps --requires 'setup'------------";

"----------- refine test-pbtyps ------requires 'setup'------------";

"----------- Refine_Problem (aus subp-rooteq.sml) ----------------";

"----------- fun coll_guhs ---------------------------------------";

"----------- fun guh2kestoreID -----------------------------------";

"-----------------------------------------------------------------";

"-----------------------------------------------------------------";

"-----------------------------------------------------------------";

"----------- testdata for refin, refine_ori ----------------------";

"----------- testdata for refin, refine_ori ----------------------";

"----------- testdata for refin, refine_ori ----------------------";

show_ptyps();

val thy = @{theory "Isac"};

val ctxt = Proof_Context.init_global @{theory "Isac"};

(*case 1: no refinement *)

val (d1,ts1) = split_dts ((Thm.term_of o the o (parse thy)) "fixedValues [aaa = 0]");

val (d2,ts2) = split_dts ((Thm.term_of o the o (parse thy)) "errorBound (ddd = 0)");

val ori1 = [(1,[1],"#Given",d1,ts1), (2,[1],"#Given",d2,ts2)]: ori list;

(*case 2: refined to pbt without children *)

val (d2,ts2) = split_dts ((Thm.term_of o the o (parse thy)) "relations [aaa333]");

val ori2 = [(1,[1],"#Given",d1,ts1), (2,[1],"#Given",d2,ts2)]:ori list;

(*case 3: refined to pbt with children *)

val (d2,ts2) = split_dts ((Thm.term_of o the o (parse thy)) "valuesFor [aaa222]");

val ori3 = [(1,[1],"#Given",d1,ts1), (2,[1],"#Given",d2,ts2)]:ori list;

(*case 4: refined to children (without child)*)

val (d3,ts3) = split_dts ((Thm.term_of o the o (parse thy)) "boundVariable aaa222yyy");

val ori4 = [(1,[1],"#Given",d1,ts1), (2,[1],"#Given",d2,ts2), (3,[1],"#Given",d3,ts3)]:ori list;

(*=================================================================

This test expects pbls at a certain position in the tree.

Since parallel evaluation (i.e. Theory_Data) this cannot be expected.

Solutions would be

* provide an access function for a branch (not only leaves)

* sort the tree of pbls.

"----------- refin test-pbtyps -----------------------------------";

"----------- refin test-pbtyps -----------------------------------";

"----------- refin test-pbtyps -----------------------------------";

(* fragile test setup: expects ptyps as fixed *)

val level_1 = case nth 9 (get_ptyps ()) of

Ptyp ("test", _, level_1) => level_1 | _ => error "refin broken: root-branch in ptyps changed?"

val level_2 = case nth 4 level_1 of

Ptyp ("refine", _, level_2) => level_2 | _ => error "refin broken: lev1-branch in ptyps changed?"

val pbla_branch = case level_2 of 

[Ptyp ("pbla", _, _)] => level_2 | _ => error "refin broken: lev2-branch in ptyps changed?";

(*case 1: no refinement *)

case refin [] ori1 (hd pbla_branch) of 

  SOME ["pbla"] => () | _ => error "refin case 1 broken";

(*case 2: refined to pbt without children *)

case refin [] ori2 (hd pbla_branch) of 

  SOME ["pbla", "pbla3"] => () | _ => error "refin case 2 broken";

(*case 3: refined to pbt with children *)

case refin [] ori3 (hd pbla_branch) of 

  SOME ["pbla", "pbla2"] => () | _ => error "refin case 3 broken";

(*case 4: refined to children (without child)*)

case refin [] ori4 (hd pbla_branch) of 

  SOME ["pbla", "pbla2", "pbla2y"] => () | _ => error "refin case 4 broken";

(*case 5: start refinement somewhere in ptyps*)

val [Ptyp ("pbla",_,[_, ppp as Ptyp ("pbla2",_,_), _])] = pbla_branch;

case refin ["pbla"] ori4 ppp of 

  SOME ["pbla", "pbla2", "pbla2y"] => () | _ => error "refin case 5 broken";

==================================================================*)

"----------- refine_ori test-pbtyps ------------------------------";

"----------- refine_ori test-pbtyps ------------------------------";

"----------- refine_ori test-pbtyps ------------------------------";

(*case 1: no refinement *)

case refine_ori ori1 ["pbla", "refine", "test"] of 

  NONE => () | _ => error "refine_ori case 1 broken";

(*case 2: refined to pbt without children *)

case refine_ori ori2 ["pbla", "refine", "test"] of 

  SOME ["pbla3", "pbla", "refine", "test"] => () | _ => error "refine_ori case 2 broken";

(*case 3: refined to pbt with children *)

case refine_ori ori3 ["pbla", "refine", "test"] of 

  SOME ["pbla2", "pbla", "refine", "test"] => () | _ => error "refine_ori case 3 broken";

(*case 4: refined to children (without child)*)

case refine_ori ori4 ["pbla", "refine", "test"] of 

  SOME ["pbla2y","pbla2","pbla", "refine", "test"] => () | _ => error "refine_ori case 4 broken";

(*case 5: start refinement somewhere in ptyps*)

case refine_ori ori4 ["pbla2","pbla", "refine", "test"] of 

  SOME ["pbla2y", "pbla2", "pbla", "refine", "test"] => () | _ => error "refine_ori case 5 broken";

"----------- refine test-pbtyps ----------------------------------";

"----------- refine test-pbtyps ----------------------------------";

"----------- refine test-pbtyps ----------------------------------";

val fmz1 = ["fixedValues [aaa=0]","errorBound (ddd=0)"];

val fmz2 = ["fixedValues [aaa=0]","relations aaa333"];

val fmz3 = ["fixedValues [aaa=0]","valuesFor [aaa222]"];

val fmz4 = ["fixedValues [aaa=0]","valuesFor [aaa222]",

	    "boundVariable aaa222yyy"];

(*case 1: no refinement *)

case refine fmz1 ["pbla", "refine", "test"] of

  [Matches (["pbla", "refine", "test"], _), 

   NoMatch (["pbla1", "pbla", "refine", "test"], _), 

   NoMatch (["pbla2", "pbla", "refine", "test"], _), 

   NoMatch (["pbla3", "pbla", "refine", "test"], _)] => ()

 | _ => error "--- refine test-pbtyps --- broken with case 1";

(* 

*** pass ["pbla"]

*** pass ["pbla","pbla1"]

*** pass ["pbla","pbla2"]

*** pass ["pbla","pbla3"]

val it =

  [Matches

     (["pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",

              Superfl "errorBound (ddd = #0)"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla1","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "maximum a1_",

              Superfl "errorBound (ddd = #0)"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "valuesFor a2_",

              Superfl "errorBound (ddd = #0)"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla3","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "relations a3_",

              Superfl "errorBound (ddd = #0)"],Relate=[],Where=[],With=[]})]

  : match list*)

(*case 2: refined to pbt without children *)

case refine fmz2 ["pbla", "refine", "test"] of

  [Matches (["pbla", "refine", "test"], _),

   NoMatch (["pbla1", "pbla", "refine", "test"], _),

   NoMatch (["pbla2", "pbla", "refine", "test"], _),

   Matches (["pbla3", "pbla", "refine", "test"], _)] => ()

 | _ => error "--- refine test-pbtyps --- broken with case 2";

(* 

*** pass ["pbla"]

*** pass ["pbla","pbla1"]

*** pass ["pbla","pbla2"]

*** pass ["pbla","pbla3"]

val it =

  [Matches

     (["pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Superfl "relations aaa333"],

       Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla1","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "maximum a1_",

              Superfl "relations aaa333"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "valuesFor a2_",

              Superfl "relations aaa333"],Relate=[],Where=[],With=[]}),

   Matches

     (["pbla3","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "relations aaa333"],

       Relate=[],Where=[],With=[]})] : match list*)

(*case 3: refined to pbt with children *)

case refine fmz3 ["pbla", "refine", "test"] of

  [Matches (["pbla", "refine", "test"], _),

   NoMatch (["pbla1", "pbla", "refine", "test"], _),

   Matches (["pbla2", "pbla", "refine", "test"], _),

   NoMatch (["pbla2x", "pbla2", "pbla", "refine", "test"], _),

   NoMatch (["pbla2y", "pbla2", "pbla", "refine", "test"], _),

   NoMatch (["pbla2z", "pbla2", "pbla", "refine", "test"], _),

   NoMatch (["pbla3", "pbla", "refine", "test"], _)] => ()

 | _ => error "--- refine test-pbtyps --- broken with case 3";

(* 

*** pass ["pbla"]

*** pass ["pbla","pbla1"]

*** pass ["pbla","pbla2"]

*** pass ["pbla","pbla2","pbla2x"]

*** pass ["pbla","pbla2","pbla2y"]

*** pass ["pbla","pbla2","pbla2z"]

*** pass ["pbla","pbla3"]

val it =

  [Matches

     (["pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Superfl "valuesFor aaa222"],

       Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla1","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "maximum a1_",

              Superfl "valuesFor aaa222"],Relate=[],Where=[],With=[]}),

   Matches

     (["pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222"],

       Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2x","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Missing "functionOf a2x_"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2y","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Missing "boundVariable a2y_"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2z","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Missing "interval a2z_"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla3","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "relations a3_",

              Superfl "valuesFor aaa222"],Relate=[],Where=[],With=[]})]

  : match list*)

(*case 4: refined to children (without child)*)

case refine fmz4 ["pbla", "refine", "test"] of

    [Matches (["pbla", "refine", "test"], _), 

     NoMatch (["pbla1", "pbla", "refine", "test"], _), 

     Matches (["pbla2", "pbla", "refine", "test"], _), 

     NoMatch (["pbla2x", "pbla2", "pbla", "refine", "test"], _), 

     Matches (["pbla2y", "pbla2", "pbla", "refine", "test"], _)] => ()

  | _ => error "--- refine test-pbtyps --- broken with case 4";

(* 

*** pass ["pbla"]

*** pass ["pbla","pbla1"]

*** pass ["pbla","pbla2"]

*** pass ["pbla","pbla2","pbla2x"]

*** pass ["pbla","pbla2","pbla2y"]

val it =

  [Matches

     (["pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Superfl "valuesFor aaa222",

              Superfl "boundVariable aaa222yyy"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla1","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Missing "maximum a1_",

              Superfl "valuesFor aaa222",Superfl "boundVariable aaa222yyy"],

       Relate=[],Where=[],With=[]}),

   Matches

     (["pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Superfl "boundVariable aaa222yyy"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2x","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Missing "functionOf a2x_",Superfl "boundVariable aaa222yyy"],

       Relate=[],Where=[],With=[]}),

   Matches

     (["pbla2y","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Correct "boundVariable aaa222yyy"],Relate=[],Where=[],With=[]})]

  : match list*)

(*case 5: start refinement somewhere in ptyps*)

case refine fmz4 ["pbla2","pbla", "refine", "test"] of

    [Matches (["pbla2", "pbla", "refine", "test"], _), 

     NoMatch (["pbla2x", "pbla2", "pbla", "refine", "test"], _), 

     Matches (["pbla2y", "pbla2", "pbla", "refine", "test"], _)] => ()

  | _ => error "--- refine test-pbtyps --- broken with case 5";

(* 

*** pass ["pbla","pbla2"]

*** pass ["pbla","pbla2","pbla2x"]

*** pass ["pbla","pbla2","pbla2y"]

val it =

  [Matches

     (["pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Superfl "boundVariable aaa222yyy"],Relate=[],Where=[],With=[]}),

   NoMatch

     (["pbla2x","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Missing "functionOf a2x_",Superfl "boundVariable aaa222yyy"],

       Relate=[],Where=[],With=[]}),

   Matches

     (["pbla2y","pbla2","pbla"],

      {Find=[],

       Given=[Correct "fixedValues [aaa = #0]",Correct "valuesFor aaa222",

              Correct "boundVariable aaa222yyy"],Relate=[],Where=[],With=[]})]

  : match list*)

"----------- Refine_Problem (aus subp-rooteq.sml) ----------------";

"----------- Refine_Problem (aus subp-rooteq.sml) ----------------";

"----------- Refine_Problem (aus subp-rooteq.sml) ----------------";

(*WN120313: attention: the 'nxt' in the comments are not correct!*)

val c = [];

val fmz = ["equality ((x+1)*(x+2)=x^^^2+(8::real))","solveFor x",

	   "errorBound (eps=0)","solutions L"];

val (dI',pI',mI') = ("Test",["sqroot-test","univariate","equation","test"],

		     ["Test","squ-equ-test-subpbl1"]);

val (p,_,f,nxt,_,pt) = CalcTreeTEST [(fmz, (dI',pI',mI'))];

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt; (*nxt = ("Add_Find", Add_Find "solutions L")*)

val nxt = ("Specify_Problem", 	  Specify_Problem ["LINEAR","univariate","equation","test"]);

(*=== specify a not-matching problem ------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val www = 

case f of Form' (PpcKF (0, EdUndef, 0, Nundef, (Problem [],

  {Find = [Incompl "solutions"], With = [],

   Given = [Correct "equality ((x + 1) * (x + 2) = x ^^^ 2 + 8)", Correct "solveFor x"],

   Where = [False www],

   Relate = [],...}))) => www

| _ => error "--- Refine_Problem broken 1";

if www = "matches (x = 0) ((x + 1) * (x + 2) = x ^^^ 2 + 8) |\nmatches (?b * x = 0) ((x + 1) * (x + 2) = x ^^^ 2 + 8) |\nmatches (?a + x = 0) ((x + 1) * (x + 2) = x ^^^ 2 + 8) |\nmatches (?a + ?b * x = 0) ((x + 1) * (x + 2) = x ^^^ 2 + 8)"

then () else error "--- Refine_Problem broken 2";

(*ML> f; 

val it = Form' (PpcKF (0,EdUndef,0,Nundef,

        (Problem ["LINEAR","univariate","equation","test"],   <<<<<===== diff.to above WN120313

         {Find=[Incompl "solutions []"],

          Given=[Correct "equality ((x + #1) * (x + #2) = x ^^^ #2 + #8)",

                 Correct "solveFor x"],Relate=[],

          Where=[False "matches (x = #0) ((x + #1) * (x + #2) = x ^^^ #2 + #8)

                |\nmatches (?b * x = #0) ((x + #1) * (x + #2) = x ^^^ #2 + #8)

                |\nmatches (?a + x = #0) ((x + #1) * (x + #2) = x ^^^ #2 + #8)

        |\nmatches (?a + ?b * x = #0) ((x + #1) * (x + #2) = x ^^^ #2 + #8)"],

          With=[]}))) : mout

val nxt = ("Add_Find",Add_Find "solutions L") ????!!!!????*)

val (p,_,f,nxt,_,pt) = (me nxt p c pt) (*handle e => OldGoals.print_exn e*);

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Empty_Tac",Empty_Tac) 

... Refine_Problem ["LINEAR"..] fails internally 040312: works!?!*)

val nxt = ("Refine_Problem",Refine_Problem ["univariate","equation","test"]);

(*=== refine problem -----------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*("Specify_Problem", Specify_Problem ["normalize", "univariate", ...])*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = ("Specify_Theory", Specify_Theory "Test")*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = ("Specify_Method", Specify_Method ["Test", "squ-equ-test-subpbl1"]*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = ("Apply_Method", *)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = ("Rewrite_Set", Rewrite_Set "norm_equation")*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = ("Rewrite_Set", Rewrite_Set "Test_simplify")*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*Subproblem ("Test", ["LINEAR", "univariate", "equation", "test"]*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = Model_Problem ["LINEAR","univariate","equation","test"]*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = ("Add_Given", Add_Given "equality (-6 + 3 * x = 0)"*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(**)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*nxt = Specify_Problem ["LINEAR","univariate","equation","test"])*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*xt = ("Specify_Method", Specify_Method ["Test", "solve_linear"])*)

val nxt = ("Refine_Problem",Refine_Problem ["univariate","equation","test"]);

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*("Specify_Problem", Specify_Problem ["LINEAR", "univariate", ...])*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Specify_Method",Specify_Method ("Test","solve_linear"))*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Apply_Method",Apply_Method ("Test","solve_linear"))*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Rewrite_Set_Inst",Rewrite_Set_Inst ([#],"isolate_bdv"))*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Rewrite_Set",Rewrite_Set "Test_simplify")*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Check_Postcond",Check_Postcond ["LINEAR","univariate","eq*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*val nxt = ("Check_elementwise",Check_elementwise "Assumptions")*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

(*Check_Postcond ["normalize","univariate","equation","test"])*)

val (p,_,f,nxt,_,pt) = me nxt p c pt;

val Form' (FormKF (~1,EdUndef,_,Nundef,res)) = f;

if res = "[x = 2]"

then case nxt of ("End_Proof'", End_Proof') => ()

  | _ => error "new behaviour in test:refine.sml:miniscript with mini-subpb 1"

else error "new behaviour in test:refine.sml:miniscript with mini-subpb 2" 

"----------- fun coll_guhs ---------------------------------------";

"----------- fun coll_guhs ---------------------------------------";

"----------- fun coll_guhs ---------------------------------------";

val n = e_pbt;

(#guh : pbt -> guh) e_pbt;

fun XXXnode coll (Ptyp (_,[n],ns)) =

    [(#guh : pbt -> guh) n]

and XXXnodes coll [] = coll

  | XXXnodes coll (n::ns : pbt ptyp list) = (XXXnode coll n) @ 

					    (XXXnodes coll ns);

(*^^^ this works, but not this ...

fun node coll (Ptyp (_,[n],ns)) =

    [(#guh : 'a -> guh) n]

and nodes coll [] = coll

  | nodes coll (n::ns : 'a ptyp list) = (node coll n) @ (nodes coll ns);

Error:

Can't unify {guh: 'a, ...} with 'b (Cannot unify with explicit type variable)

   Found near #guh : 'a -> guh

i.e. there is no common fun for pbls and mets ?!?*)

coll_pblguhs (get_ptyps ());

sort string_ord (coll_pblguhs (get_ptyps ()));

show_pblguhs ();

sort_pblguhs ();

"----------- fun guh2kestoreID -----------------------------------";

"----------- fun guh2kestoreID -----------------------------------";

"----------- fun guh2kestoreID -----------------------------------";

"----- we assumed the problem-hierarchy containing 3 elements on toplevel";

(* ERROR: Exception Bind raised *)

val (Ptyp (id1,[n1 as {guh=guh1,...} : pbt], ns1)::

     Ptyp (id2,[n2 as {guh=guh2,...} : pbt], ns2):: _) = (get_ptyps ());

(*

nodes [] guh1 (get_ptyps ());

nodes [] guh2 (get_ptyps ());

*)

val (Ptyp (id1,[n1 as {guh=guh1,...} : pbt], ns1)

     ::

     Ptyp (id2,[n2 as {guh=guh2,...} : pbt], 

	   (Ptyp (id21,[n21 as {guh=guh21,...} : pbt], ns21)) :: _ )

     ::

     Ptyp (id3,[n3 as {guh=guh3,...} : pbt], ns3)

     ::

     _ ) = (get_ptyps ());

(*

nodes [] guh3 (get_ptyps ());

nodes [] guh21 (get_ptyps ());

*)