aboutsummaryrefslogtreecommitdiff
path: root/src/interp/format.boot
blob: 416ecab4e3b26d07cf34dd62f2616179ef6222da (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2009, Gabriel Dos Reis.
-- All rights reserved.
--
-- Redistribution and use in source and binary forms, with or without
-- modification, are permitted provided that the following conditions are
-- met:
--
--     - Redistributions of source code must retain the above copyright
--       notice, this list of conditions and the following disclaimer.
--
--     - Redistributions in binary form must reproduce the above copyright
--       notice, this list of conditions and the following disclaimer in
--       the documentation and/or other materials provided with the
--       distribution.
--
--     - Neither the name of The Numerical Algorithms Group Ltd. nor the
--       names of its contributors may be used to endorse or promote products
--       derived from this software without specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-- IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
-- PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


import macros
namespace BOOT

--% Functions for display formatting system objects

-- some of these are redundant and should be compacted
$formatSigAsTeX := 1
$permitWhere := false

++
$abbreviateJoin := false

--% Formatting modemaps

sayModemap m ==
  -- sayMSG formatModemap displayTranModemap m
  sayMSG formatModemap old2NewModemaps displayTranModemap m

sayModemapWithNumber(m,n) ==
  msg := reverse cleanUpSegmentedMsg reverse ["%i","%i",'" ",
    STRCONC(lbrkSch(),object2String n,rbrkSch()),
      :formatModemap displayTranModemap m,"%u","%u"]
  sayMSG flowSegmentedMsg(reverse msg,$LINELENGTH,3)

displayOpModemaps(op,modemaps) ==
  TERPRI()
  count:= #modemaps
  phrase:= (count=1 => 'modemap;'modemaps)
  sayMSG ['%b,count,'%d,phrase,'" for",'%b,op,'%d,'":"]
  for modemap in modemaps repeat sayModemap modemap

displayTranModemap (mm is [[x,:sig],[pred,:y],:z]) ==
  -- The next 8 lines are a HACK to deal with the "partial" definition
  -- JHD/RSS
  if pred is ['partial,:pred'] then
    [b,:c]:=sig
    sig:=[['Union,b,'"failed"],:c]
    mm:=[[x,:sig],[pred',:y],:z]
  else if pred = 'partial then
    [b,:c]:=sig
    sig:=[['Union,b,'"failed"],:c]
    mm:=[[x,:sig],y,:z]
  mm' := EQSUBSTLIST('(m n p q r s t i j k l),
    MSORT listOfPredOfTypePatternIds pred,mm)
  EQSUBSTLIST('(D D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14),
    MSORT listOfPatternIds [sig,[pred,:y]],mm')

listOfPredOfTypePatternIds p ==
  p is ['AND,:lp] or p is ['OR,:lp] =>
    UNIONQ([:listOfPredOfTypePatternIds p1 for p1 in lp],NIL)
  p is [op,a,.] and op = 'ofType =>
    isPatternVar a => [a]
    nil
  nil

removeIsDomains pred ==
  pred is ['isDomain,a,b] => true
  pred is ['AND,:predl] =>
    MKPF([x for x in predl | x isnt ['isDomain,:.]],'AND)
  pred

canRemoveIsDomain? pred ==
  -- returns nil OR an alist for substitutions of domains ordered so that
  -- after substituting for each pair in turn, no left-hand names remain
  alist :=
    pred is ['isDomain,a,b] => [[a,:b],:alist]
    pred is ['AND,:predl] =>
      [[a,:b] for pred in predl | pred is ['isDomain,a,b]]
  findSubstitutionOrder? alist

findSubstitutionOrder? alist == fn(alist,nil) where
  -- returns NIL or an appropriate substituion order
  fn(alist,res) ==
    null alist => nreverse res
    choice := or/[x for (x:=[a,:b]) in alist | null containedRight(a,alist)] =>
      fn(delete(choice,alist),[choice,:res])
    nil

containedRight(x,alist)== or/[CONTAINED(x,y) for [.,:y] in alist]

removeIsDomainD pred ==
  pred is ['isDomain,'D,D] =>
    [D,nil]
  pred is ['AND,:preds] =>
    D := nil
    for p in preds while not D repeat
      p is ['isDomain,'D,D1] =>
        D := D1
        npreds := delete(['isDomain,'D,D1],preds)
    D =>
      1 = #npreds => [D,first npreds]
      [D,['AND,:npreds]]
    nil
  nil

formatModemap modemap ==
  [[dc,target,:sl],pred,:.]:= modemap
  if alist := canRemoveIsDomain? pred then
    dc:= substInOrder(alist,dc)
    pred:= substInOrder(alist,removeIsDomains pred)
    target:= substInOrder(alist,target)
    sl:= substInOrder(alist,sl)
  else if removeIsDomainD pred is [D,npred] then
    pred := substitute(D,'D,npred)
    target := substitute(D,'D,target)
    sl := substitute(D,'D,sl)
  predPart:= formatIf pred
  targetPart:= prefix2String target
  argTypeList:=
    null sl => nil
    concat(prefix2String first sl,fn(rest sl)) where
      fn l ==
        null l => nil
        concat(",",prefix2String first l,fn rest l)
  argPart:=
    #sl<2 => argTypeList
    ['"_(",:argTypeList,'"_)"]
  fromPart:=
    if dc = 'D and D
      then concat('%b,'"from",'%d,prefix2String D)
      else concat('%b,'"from",'%d,prefix2String dc)
  firstPart:= concat('" ",argPart,'" -> ",targetPart)
  sayWidth firstPart + sayWidth fromPart > 74 => --allow 5 spaces for " [n]"
    fromPart:= concat('" ",fromPart)
    secondPart :=
      sayWidth fromPart + sayWidth predPart < 75 =>
        concat(fromPart,predPart)
      concat(fromPart,'%l,predPart)
    concat(firstPart,'%l,secondPart)
  firstPart:= concat(firstPart,fromPart)
  sayWidth firstPart + sayWidth predPart < 80 =>
    concat(firstPart,predPart)
  concat(firstPart,'%l,predPart)

substInOrder(alist,x) ==
  alist is [[a,:b],:y] => substInOrder(y,substitute(b,a,x))
  x

reportOpSymbol op1 ==
  -- Don't forget that "^" is another name for "**"
  if op1 = "^" then
    sayMessage ['"  ",op1, '" is another name for", :bright '"**"]
    op1 := "**"
  op := (STRINGP op1 => INTERN op1; op1)
  modemaps := getAllModemapsFromDatabase(op,nil)
  null modemaps =>
    ok := true
    sayKeyedMsg("S2IF0010",[op1])
    if SIZE PNAME op1 < 3 then
      x := UPCASE queryUserKeyedMsg("S2IZ0060",[op1])
      null (STRING2ID_-N(x,1) in '(Y YES)) =>
        ok := nil
        sayKeyedMsg("S2IZ0061",[op1])
    ok => apropos [op1]
  sayNewLine()
  -- filter modemaps on whether they are exposed
  mmsE := mmsU := NIL
  for mm in modemaps repeat
    isFreeFunctionFromMm(mm) or isExposedConstructor getDomainFromMm(mm) => mmsE := [mm,:mmsE]
    mmsU := [mm,:mmsU]
  if mmsE then
    sayMms(op,mmsE,'"exposed")
  if mmsU then
    if mmsE then sayNewLine()
    sayMms(op,mmsU,'"unexposed")
  nil
 where
  sayMms(op,mms,label) ==
    m := # mms
    sayMSG
      m = 1 =>
        ['"There is one",:bright label,'"function called",
          :bright op,'":"]
      ['"There are ",m,:bright label,'"functions called",
        :bright op,'":"]
    for mm in mms for i in 1.. repeat
      sayModemapWithNumber(mm,i)

formatOpType (form:=[op,:argl]) ==
  null argl => unabbrev op
  form2String [unabbrev op, :argl]

formatOperationAlistEntry (entry:= [op,:modemaps]) ==
  -- alist has entries of the form: ((op sig) . pred)
  -- opsig on this list => op is defined only when the predicate is true
  ans:= nil
  for [sig,.,:predtail] in modemaps repeat
    pred := (predtail is [p,:.] => p; 'T)
    -- operation is always defined
    ans :=
      [concat(formatOpSignature(op,sig),formatIf pred),:ans]
  ans

formatOperation([[op,sig],.,[fn,.,n]],domain) ==
  opSigString := formatOpSignature(op,sig)
  INTEGERP n and function Undef = KAR domain.n =>
    if INTEGERP $commentedOps then $commentedOps := $commentedOps + 1
    concat(" --",opSigString)
  opSigString

formatOpSignature(op,sig) ==
  concat('%b,formatOpSymbol(op,sig),'%d,": ",formatSignature sig)

formatOpConstant op ==
  concat('%b,formatOpSymbol(op,'($)),'%d,'": constant")

formatOpSymbol(op,sig) ==
  if op = 'Zero then op := "0"
  else if op = 'One then op := "1"
  null sig => op
  quad := specialChar 'quad
  n := #sig
  (op = 'elt) and (n = 3) =>
    (second(sig) = '_$) =>
      STRINGP (sel := third(sig)) =>
        [quad,".",sel]
      [quad,".",quad]
    op
  STRINGP op or GETL(op,"Led") or GETL(op,"Nud") =>
    n = 3 =>
      if op = 'SEGMENT then op := '".."
      op = 'in => [quad,'" ",op,'" ",quad]
-- stop exquo from being displayed as infix (since it is not accepted
-- as such by the interpreter)
      op = 'exquo => op
      [quad,op,quad]
    n = 2 =>
      not GETL(op,"Nud") => [quad,op]
      [op,quad]
    op
  op

formatAttribute x ==
  atom x => ["  ",x]
  x is [op,:argl] =>
    for x in argl repeat
      argPart:= NCONC(argPart,concat(",",formatAttributeArg x))
    argPart => concat("  ",op,"_(",rest argPart,"_)")
    ["  ",op]

formatAttributeArg x ==
  STRINGP x and x ='"*" => "_"*_""
  atom x => formatOpSymbol (x,nil)
  x is [":",op,["Mapping",:sig]] =>
    concat('%b,formatOpSymbol(op,sig),": ",'%d,formatMapping sig)
  prefix2String0 x

formatMapping sig ==
  "STRCONC"/concat("Mapping(",formatSignature sig,")")

dollarPercentTran x ==
    -- Translate $ to %. We actually return %% so that the message
    -- printer will display a single %
    x is [y,:z] =>
        y1 := dollarPercentTran y
        z1 := dollarPercentTran z
        EQ(y, y1) and EQ(z, z1) => x
        [y1, :z1]
    x = "$" or x = '"$" => "%%"
    x = "T$" or x = '"T$" => "T"
    x

formatSignatureAsTeX sig == 
  $formatSigAsTeX: local := 2
  formatSignature0 sig

formatSignature sig ==
  $formatSigAsTeX: local := 1
  formatSignature0 sig

formatSignatureArgs sml ==
  $formatSigAsTeX: local := 1
  formatSignatureArgs0 sml
  
formatSignature0 sig ==
  null sig => "() -> ()"
  INTEGERP sig => '"hashcode"
  [tm,:sml] := sig
  sourcePart:= formatSignatureArgs0 sml
  targetPart:= prefix2String0 tm
  dollarPercentTran concat(sourcePart,concat(" -> ",targetPart))

formatSignatureArgs0(sml) ==
-- formats the arguments of a signature
  null sml => ["_(_)"]
  null rest sml => prefix2String0 first sml
  argList:= prefix2String0 first sml
  for m in rest sml repeat
    argList:= concat(argList,concat(",",prefix2String0 m))
  concat("_(",concat(argList,"_)"))

--% Conversions to string form

expr2String x ==
  atom (u:= prefix2String0 x) => u
  "STRCONC"/[atom2String y for y in u]

-- exports (this is a badly named bit of sillyness)
prefix2StringAsTeX form ==
  form2StringAsTeX form

prefix2String form ==
  form2String form

-- local version
prefix2String0 form ==
  form2StringLocal form

--  SUBRP form => formWrapId BPINAME form
--  atom form =>
--    form=$EmptyMode or form=$quadSymbol => formWrapId specialChar 'quad
--    STRINGP form => formWrapId form
--    IDENTP form => 
--      constructor? form => app2StringWrap(formWrapId form, [form])
--      formWrapId form
--    formWrapId STRINGIMAGE form

form2StringWithWhere u ==
  $permitWhere : local := true
  $whereList: local := nil
  s:= form2String u
  $whereList => concat(s,'%b,'"where",'%d,"%i",$whereList,"%u")
  s

form2StringWithPrens form ==
  null (argl := rest form) => [first form]
  null rest argl => [first form,"(",first argl,")"]
  form2String form

formString u ==
  x := form2String u
  atom x => STRINGIMAGE x
  "STRCONC"/[STRINGIMAGE y for y in x]

form2String u == 
  $formatSigAsTeX: local := 1
  form2StringLocal u

form2StringAsTeX u == 
  $formatSigAsTeX: local := 2
  form2StringLocal u

form2StringLocal u ==
--+
  $NRTmonitorIfTrue : local := nil
  $fortInts2Floats  : local := nil
  form2String1 u

constructorName con ==
  $abbreviateTypes => abbreviate con
  con

form2String1 u ==
  ATOM u => 
    u=$EmptyMode or u=$quadSymbol => formWrapId specialChar 'quad
    IDENTP u =>
      constructor? u => app2StringWrap(formWrapId u, [u])
      u
    SUBRP u => formWrapId BPINAME u
    STRINGP u => formWrapId u
    WRITE_-TO_-STRING formWrapId u
  u1 := u
  [op,:argl] := u
  op='Join or op= 'mkCategory => formJoin1(op,argl)
  $InteractiveMode and IDENTP op and (u:= constructor? op) =>
    null argl => app2StringWrap(formWrapId constructorName op, u1)
    op = "NTuple"  => [ form2String1 first argl, "*"]
    op = "Map"     => ["(",:formatSignature0 [argl.1,argl.0],")"]
    op = "Record" => record2String(argl)
    null (conSig := getConstructorSignature op) =>
      application2String(constructorName op,[form2String1(a) for a in argl], u1)
    ml := rest conSig
    if not freeOfSharpVars ml then
      ml:=SUBLIS([[pvar,:val] for pvar in $FormalMapVariableList
        for val in argl], ml)
    argl:= formArguments2String(argl,ml)
      -- extra null check to handle mutable domain hack.
    null argl => constructorName op
    application2String(constructorName op,argl, u1)
  op = "Mapping" => ["(",:formatSignature argl,")"]
  op = "Record" => record2String(argl)
  op = "Union"  =>
    application2String(op,[form2String1 x for x in argl], u1)
  op = ":" =>
      null argl => [ '":" ]
      null rest argl => [ '":", form2String1 first argl ]
      formDecl2String(argl.0,argl.1)
  op = "#" and CONSP argl and LISTP first argl =>
    STRINGIMAGE SIZE first argl
  op = 'Join => formJoin2String argl
  op = "ATTRIBUTE" => form2String1 first argl
  op='Zero => 0
  op='One => 1
  op = 'AGGLST => tuple2String argl
  op = 'BRACKET =>
    argl' := form2String1 first argl
    ["[",:(atom argl' => [argl']; argl'),"]"]
  op = 'PAREN =>
    argl' := form2String1 first argl
    ["(",:(atom argl' => [argl']; argl'),")"]
  op = "SIGNATURE" =>
     [operation,sig] := argl
     concat(operation,'": ",formatSignature sig)
  op = 'COLLECT => formCollect2String argl
  op = 'construct =>
    concat(lbrkSch(),
           tuple2String [form2String1 x for x in argl],rbrkSch())
  op = "SEGMENT" =>
    null argl => '".."
    lo := form2String1 first argl
    argl := rest argl
    (null argl) or null (first argl) => [lo, '".."]
    [lo, '"..", form2String1 first argl]
  isBinaryInfix op => formatAsFortranExpresion [op,:argl]
  -- COMPILED_-FUNCTION_-P(op) => form2String1 coerceMap2E(u1,NIL)
  application2String(op,[form2String1 x for x in argl], u1)

formWrapId id == 
  $formatSigAsTeX = 1 => id
  $formatSigAsTeX = 2 => 
    sep := '"`"
    FORMAT(NIL,'"\verb~a~a~a",sep, id, sep)
  error "Bad formatSigValue"

formArguments2String(argl,ml) == [fn(x,m) for x in argl for m in ml] where
  fn(x,m) ==
    x=$EmptyMode or x=$quadSymbol => specialChar 'quad
    STRINGP(x) or IDENTP(x) => x
    x is [ ='_:,:.] => form2String1 x
    isValidType(m) and CONSP(m) and
      (getConstructorKindFromDB first(m) = "domain") =>
        (x' := coerceInteractive(objNewWrap(x,m),$OutputForm)) =>
          form2String1 objValUnwrap x'
        form2String1 x
    form2String1 x

formDecl2String(left,right) ==
  $declVar: local := left
  whereBefore := $whereList
  ls:= form2StringLocal left
  rs:= form2StringLocal right
  NE($whereList,whereBefore) and $permitWhere => ls
  concat(form2StringLocal ls,'": ",rs)

formJoin1(op,u) ==
  if op = 'Join then [:argl,last] := u else (argl := nil; last := [op,:u])
  last is [id,.,:r] and id in '(mkCategory CATEGORY) =>
    $abbreviateJoin = true => concat(formJoin2 argl,'%b,'"with",'%d,'"...")
    $permitWhere = true =>
      opList:= formatJoinKey(r,id)
      $whereList:= concat($whereList,"%l",$declVar,": ",
        formJoin2 argl,'%b,'"with",'%d,"%i",opList,"%u")
      formJoin2 argl
    opList:= formatJoinKey(r,id)
    suffix := concat('%b,'"with",'%d,"%i",opList,"%u")
    concat(formJoin2 argl,suffix)
  formJoin2 u

formatJoinKey(r,key) ==
  key = 'mkCategory =>
    r is [opPart,catPart,:.] =>
      opString :=
        opPart is [='LIST,:u] =>
          "append"/[concat("%l",formatOpSignature(op,sig),formatIf pred)
            for [='QUOTE,[[op,sig],pred]] in u]
        nil
      catString :=
        catPart is [='LIST,:u] =>
          "append"/[concat("%l",'" ",form2StringLocal con,formatIf pred)
            for [='QUOTE,[con,pred]] in u]
        nil
      concat(opString,catString)
    '"?? unknown mkCategory format ??"
  -- otherwise we have the CATEGORY form
  "append"/[fn for x in r] where fn() ==
    x is ['SIGNATURE,op,sig] => concat("%l",formatOpSignature(op,sig))
    x is ['ATTRIBUTE,a] => concat("%l",formatAttribute a)
    x

formJoin2 argl ==
-- argl is a list of categories NOT containing a "with"
  null argl => '""
  1=#argl => form2StringLocal argl.0
  application2String('Join,[form2StringLocal x for x in argl], NIL)

formJoin2String (u:=[:argl,last]) ==
  last is ["CATEGORY",.,:atsigList] =>
    postString:= concat("_(",formTuple2String atsigList,"_)")
    #argl=1 => concat(first argl,'" with ",postString)
    concat(application2String('Join,argl, NIL)," with ",postString)
  application2String('Join,u, NIL)

formCollect2String [:itl,body] ==
  ["_(",body,:"append"/[formIterator2String x for x in itl],"_)"]

formIterator2String x ==
  x is ["STEP",y,s,.,:l] =>
    tail:= (l is [f] => form2StringLocal f; nil)
    concat("for ",y," in ",s,'"..",tail)
  x is ["tails",y] => concat("tails ",formatIterator y)
  x is ["reverse",y] => concat("reverse ",formatIterator y)
  x is ["|",y,p] => concat(formatIterator y," | ",form2StringLocal p)
  x is ["until",p] => concat("until ",form2StringLocal p)
  x is ["while",p] => concat("while ",form2StringLocal p)
  systemErrorHere ["formatIterator",x]

tuple2String argl ==
  null argl => nil
  string := first argl
  if member(string, '("failed" "nil" "prime" "sqfr" "irred"))
    then string := STRCONC('"_"",string,'"_"")
    else string :=
      ATOM string => object2String string
      [f x for x in string]
  for x in rest argl repeat
    if member(x,'("failed" "nil" "prime" "sqfr" "irred")) then
      x := STRCONC('"_"",x,'"_"")
    string:= concat(string,concat(",",f x))
  string
 where
  f x ==
    ATOM x => object2String x
    -- [f first x,:f rest x]
    [f y for y in x]

script2String s ==
  null s => '""   -- just to be safe
  if atom s then s := [s]
  linearFormatForm(first s, rest s)

linearFormatName x ==
  atom x => x
  linearFormat x

linearFormat x ==
  atom x => x
  x is [op,:argl] and atom op =>
    argPart:=
      argl is [a,:l] => [a,:"append"/[[",",x] for x in l]]
      nil
    [op,"(",:argPart,")"]
  [linearFormat y for y in x]

numOfSpadArguments id ==
  char("*") = (s:= PNAME id).0 =>
      +/[n for i in 1.. while INTEGERP (n:=PARSE_-INTEGER PNAME s.i)]
  keyedSystemError("S2IF0012",[id])

linearFormatForm(op,argl) ==
  s:= PNAME op
  indexList:= [PARSE_-INTEGER PNAME d for i in 1.. while
    (DIGITP (d:= s.(maxIndex:= i)))]
  cleanOp:= INTERN ("STRCONC"/[PNAME s.i for i in maxIndex..MAXINDEX s])
  fnArgs:=
    indexList.0 > 0 =>
      concat('"(",formatArgList take(-indexList.0,argl),'")")
    nil
  if #indexList > 1 then
    scriptArgs:= formatArgList take(indexList.1,argl)
    argl := drop(indexList.1,argl)
    for i in rest rest indexList repeat
      subArglist:= take(i,argl)
      argl:= drop(i,argl)
      scriptArgs:= concat(scriptArgs,";",formatArgList subArglist)
  scriptArgs:=
    scriptArgs => concat(specialChar 'lbrk,scriptArgs, specialChar 'rbrk)
    nil
  l := [(STRINGP f => f; STRINGIMAGE f) for f in
       concat(cleanOp,scriptArgs,fnArgs)]
  "STRCONC"/l

formatArgList l ==
  null l => nil
  acc:= linearFormat first l
  for x in rest l repeat
    acc:= concat(acc,",",linearFormat x)
  acc

formTuple2String argl ==
  null argl => nil
  string:= form2StringLocal first argl
  for x in rest argl repeat
    string:= concat(string,concat(",",form2StringLocal x))
  string

isInternalFunctionName(op) ==
  (not IDENTP(op)) or (op = "*") or (op = "**") => NIL
  (1 = SIZE(op':= PNAME op)) or (char("*") ~= op'.0) => NIL
  -- if there is a semicolon in the name then it is the name of
  -- a compiled spad function
  null (e := STRPOS('"_;",op',1,NIL)) => NIL
  (char(" ") = (y := op'.1)) or (char("*") = y) => NIL
  table := MAKETRTTABLE('"0123456789",NIL)
  s := STRPOSL(table,op',1,true)
  null(s) or s > e => NIL
  SUBSTRING(op',s,e-s)

application2String(op,argl, linkInfo) ==
  null argl =>
    (op' := isInternalFunctionName(op)) => op'
    app2StringWrap(formWrapId op, linkInfo)
  op = "[||]" => concat("[|",concat(prefix2String0 argl,"|]"))
  1=#argl =>
    arg := first argl
    arg is ["<",:.] or arg is ["(",:.] => concat(op,arg)
    concat(app2StringWrap(formWrapId op, linkInfo)," ",arg)
--op in '(UP SM) =>
--  newop:= (op = "UP" => "P";"M")
--  concat(newop,concat(lbrkSch(),argl.0,rbrkSch(),argl.1))
--op='RM  =>concat("M",concat(lbrkSch(),
--                     argl.0,",",argl.1,rbrkSch(),argl.2))
--op='MP =>concat("P",concat(argl.0,argl.1))
  op='SEGMENT =>
    null argl => '".."
    (null rest argl) or (null second argl) =>
      concat(first argl, '"..")
    concat(first argl, concat('"..", second argl))
  concat(app2StringWrap(formWrapId op, linkInfo) ,
                        concat("_(",concat(tuple2String argl,"_)")))

app2StringConcat0(x,y) ==
  FORMAT(NIL, '"~a ~a", x, y)

app2StringWrap(string, linkInfo) ==
  not linkInfo => string
  $formatSigAsTeX = 1 => string
  $formatSigAsTeX = 2 =>
    str2 :=  "app2StringConcat0"/form2Fence linkInfo
    sep := '"`"
    FORMAT(NIL, '"\lispLink{\verb!(|conPage| '~a)!}{~a}", 
          str2, string)
  error "Bad value for $formatSigAsTeX"

record2String x ==
  argPart := NIL
  for [":",a,b] in x repeat argPart:=
    concat(argPart,",",a,": ",form2StringLocal b)
  null argPart => '"Record()"
  concat("Record_(",rest argPart,"_)")

plural(n,string) ==
  suffix:=
    n = 1 => '""
    '"s"
  [:bright n,string,suffix]

formatIf pred ==
  not pred => nil
  member(pred,'(T (QUOTE T))) => nil
  concat('%b,'"if",'%d,pred2English pred)

formatPredParts s ==
  s is ['QUOTE,s1] => formatPredParts s1
  s is ['LIST,:s1] => [formatPredParts s2 for s2 in s1]
  s is ['devaluate,s1] => formatPredParts s1
  s is ['getDomainView,s1,.] => formatPredParts s1
  s is ['SUBST,a,b,c] =>    -- this is a signature
    s1 := formatPredParts substitute(formatPredParts a,b,c)
    s1 isnt [fun,sig] => s1
    ['SIGNATURE,fun,[formatPredParts(r) for r in sig]]
  s

pred2English x ==
  x is ['IF,cond,thenClause,elseClause] =>
    c := concat('"if ",pred2English cond)
    t := concat('" then ",pred2English thenClause)
    e := concat('" else ",pred2English elseClause)
    concat(c,t,e)
  x is ['AND,:l] =>
    tail:="append"/[concat(bright '"and",pred2English x) for x in rest l]
    concat(pred2English first l,tail)
  x is ['OR,:l] =>
    tail:= "append"/[concat(bright '"or",pred2English x) for x in rest l]
    concat(pred2English first l,tail)
  x is ['NOT,l] =>
    concat('"not ",pred2English l)
  x is [op,a,b] and op in '(_has ofCategory) =>
    concat(pred2English a,'%b,'"has",'%d,form2String abbreviate b)
  x is [op,a,b] and op in '(HasSignature HasAttribute HasCategory) =>
    concat(prefix2String0 formatPredParts a,'%b,'"has",'%d,
      prefix2String0 formatPredParts b)
  x is [op,a,b] and op in '(ofType getDomainView) =>
    if b is ['QUOTE,b'] then b := b'
    concat(pred2English a,'": ",form2String abbreviate b)
  x is [op,a,b] and op in '(isDomain domainEqual) =>
    concat(pred2English a,'" = ",form2String abbreviate b)
  x is [op,:.] and (translation := LASSOC(op,'(
    (_< . " < ") (_<_= . " <= ")
      (_> . " > ") (_>_= . " >= ") (_=  . " = ") (_~_= . " _~_= ")))) =>
        concat(pred2English a,translation,pred2English b)
  x is ['ATTRIBUTE,form] =>
    concat("attribute: ",form2String form)
  form2String x

mathObject2String x ==
  CHARACTERP x => COERCE([x],'STRING)
  object2String x

object2String x ==
  STRINGP x => x
  IDENTP x  => PNAME x
  NULL x    => '""
  CONSP  x  => STRCONC(object2String first x, object2String rest x)
  WRITE_-TO_-STRING x

object2Identifier x ==
  IDENTP x  => x
  STRINGP x => INTERN x
  INTERN WRITE_-TO_-STRING x

blankList x == "append"/[[BLANK,y] for y in x]

pkey keyStuff ==
    if atom keyStuff then keyStuff := [keyStuff]
    allMsgs := ['" "]
    while not null keyStuff repeat
        dbN := NIL
        argL := NIL
        key := first keyStuff
        keyStuff := IFCDR keyStuff
        next := IFCAR keyStuff
        while CONSP next repeat
            if first next = 'dbN then dbN := second next
            else argL := next
            keyStuff  := IFCDR keyStuff
            next      := IFCAR keyStuff
        oneMsg  := returnStLFromKey(key,argL,dbN)
        allMsgs := ['" ", :NCONC (oneMsg,allMsgs)]
    allMsgs

string2Float s ==
  -- takes a string, calls the parser on it and returns a float object
  p := ncParseFromString s
  p isnt [["$elt", FloatDomain, "float"], x, y, z] =>
    systemError '"string2Float: did not get a float expression"
  flt := getFunctionFromDomain("float", FloatDomain,
    [$Integer, $Integer, $PositiveInteger])
  SPADCALL(x, y, z, flt)



form2Fence form == 
  -- body of dbMkEvalable
  [op, :.] := form
  kind := getConstructorKindFromDB op
  kind = 'category => form2Fence1 form
  form2Fence1 mkEvalable form

form2Fence1 x ==
  x is [op,:argl] =>
    op = "QUOTE" => ['"(QUOTE ",:form2FenceQuote first argl,'")"]
    ['"(", FORMAT(NIL, '"|~a|", op),:"append"/[form2Fence1 y for y in argl],'")"]
  null x => '""
  IDENTP x => FORMAT(NIL, '"|~a|", x)
  ['"  ", x]

form2FenceQuote x ==
  NUMBERP x => [STRINGIMAGE x]
  SYMBOLP x => [FORMAT(NIL, '"|~a|", x)]
  STRINGP x => ['"_"",x,'"_""]
  atom    x => systemErrorHere ["form2FenceQuote",x]
  ['"(",:form2FenceQuote first x,:form2FenceQuoteTail rest x]

form2FenceQuoteTail x ==
  null x => ['")"]
  atom x => ['" . ",:form2FenceQuote x,'")"]
  ['" ",:form2FenceQuote first x,:form2FenceQuoteTail rest x]

form2StringList u ==
  atom (r := form2String u) => [r]
  r