aboutsummaryrefslogtreecommitdiff
path: root/src/interp/nrunfast.boot
blob: b679ec8b09c0db72c4ab9c9d1a7de202108f214f (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
-- Copyright (c) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2011, 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 c_-util
namespace BOOT

module nrunfast where
  getOpCode: (%Symbol, %Vector %Thing, %Short) -> %Maybe %Short

++
$doNotCompressHashTableIfTrue := false

++
$monitorNewWorld := false

++
$lookupDefaults := false

++
$NRTmonitorIfTrue := false

--=======================================================================
--                     Basic Functions
--=======================================================================
initNewWorld() ==
  $monitorNewWorld := false
  $spadLibFT := 'NRLIB
  $NRTmonitorIfTrue := false
  $updateCatTableIfTrue := false
  $doNotCompressHashTableIfTrue := true
 
getDomainByteVector dom == 
  CDDR domainData dom

++ Return the sequence of categories `dom' belongs to, as a vector
++ of lazy category forms.
getDomainCategoriesVector dom ==
  second domainData dom

++ Same as getDomainCategoriesVector except that we return a list of
++ input forms for the categories.
getDomainCompleteCategories dom ==
  vec := getDomainCategoriesVector dom
  cats := nil
  for i in 0..maxIndex vec repeat
    cats := [newExpandLocalType(vectorRef(vec,i),dom,dom), :cats]
  reverse! cats
 
getOpCode(op,vec,max) ==
--search Op vector for "op" returning code if found, nil otherwise
  res := nil
  for i in 0..max by 2 repeat
    sameObject?(vectorRef(vec,i),op) => return (res := i + 1)
  res

evalSlotDomain(u,dollar) ==
  $returnNowhereFromGoGet: local := false
  $: local := dollar                      -- ??? substitute
  $lookupDefaults : local := false -- new world
  u is '$ => dollar
  u is "$$" => dollar
  integer? u =>
    y := dollar.u
    vector? y => y
    y is ['%store,:.] => eval y
             --lazy domains need to marked; this is dangerous?
    y is [v,:.] =>
      vector? v => lazyDomainSet(y,dollar,u)   --old style has [$,code,:lazyt]
      ident? v and constructor? v 
        or v in '(Record Union Mapping Enumeration) =>
           lazyDomainSet(y,dollar,u)        --new style has lazyt
      y
    y
  u is ['NRTEVAL,y] => eval y
  u is ['QUOTE,y] => y
  u is [":",tag,dom] => [":",tag,evalSlotDomain(dom,dollar)]
  u is ["Enumeration",:.] => eval u
  cons? u =>
    -- The domain form may value arguments, get VM form first.
    u := expandToVMForm u
    cons? u => apply(u.op,[evalSlotDomain(x,dollar) for x in u.args])
    u
  systemErrorHere '"evalSlotDomain"

--=======================================================
--                 Lookup From Compiled Code
--=======================================================
newGoGet(:l) ==
  [:arglist,env] := l
  slot := replaceGoGetSlot env
  apply(first slot,[:arglist,rest slot])  --SPADCALL it!
 
replaceGoGetSlot env ==
  [thisDomain,index,:op] := env
  thisDomainForm := devaluate thisDomain
  bytevec := getDomainByteVector thisDomain
  numOfArgs := arrayRef(bytevec,index)
  goGetDomainSlotIndex := arrayRef(bytevec,index := index + 1)
  goGetDomain :=
     goGetDomainSlotIndex = 0 => thisDomain
     domainRef(thisDomain,goGetDomainSlotIndex)
  if cons? goGetDomain then
     goGetDomain := lazyDomainSet(goGetDomain,thisDomain,goGetDomainSlotIndex)
  sig :=
    [newExpandTypeSlot(arrayRef(bytevec,index := index + 1),thisDomain,thisDomain)
      for i in 0..numOfArgs]
  thisSlot := arrayRef(bytevec,index + 1)
  if $monitorNewWorld then
    sayLooking(concat('"%l","..",form2String thisDomainForm,
      '" wants",'"%l",'"  "),op,sig,goGetDomain)
  slot :=  basicLookup(op,sig,goGetDomain,goGetDomain)
  slot = nil =>
    $returnNowhereFromGoGet =>
      ['nowhere,:goGetDomain]  --see newGetDomainOpTable
    sayBrightly concat('"Function: ",formatOpSignature(op,sig),
      '" is missing from domain: ",form2String goGetDomain.0)
    keyedSystemError("S2NR0001",[op,sig,goGetDomain.0])
  if $monitorNewWorld then
    sayLooking1(['"goget stuffing slot",:bright thisSlot,'"of "],thisDomain)
  domainRef(thisDomain,thisSlot) := slot
  if $monitorNewWorld then
    sayLooking1('"<------",[first slot,:devaluate rest slot])
  slot
 
--=======================================================
--       Lookup Function in Slot 1 (via SPADCALL)
--=======================================================

lookupComplete(op,sig,dollar,env) == 
  newLookupInTable(op,sig,dollar,env,false)
 
lookupIncomplete(op,sig,dollar,env) == 
  newLookupInTable(op,sig,dollar,env,true)
 
newLookupInTable(op,sig,dollar,[domain,opvec],flag) ==
  dollar = nil => systemError()
  $lookupDefaults =>
    newLookupInCategories(op,sig,domain,dollar)      --lookup first in my cats
      or newLookupInAddChain(op,sig,domain,dollar)
  --fast path when called from newGoGet
  success := false
  if $monitorNewWorld then
    sayLooking(concat('"---->",form2String devaluate domain,
      '"----> searching op table for:","%l","  "),op,sig,dollar)
  someMatch := false
  numvec := getDomainByteVector domain
  predvec := domainPredicates domain
  max := maxIndex opvec
  k := getOpCode(op,opvec,max) or return
    flag => newLookupInAddChain(op,sig,domain,dollar)
    nil
  idxmax := maxIndex numvec
  start := vectorRef(opvec,k)
  finish :=
    max > k => vectorRef(opvec,k + 2)
    idxmax
  if finish > idxmax then
    systemError '"limit too large"
  numArgs := #sig - 1
  success := nil
  $isDefaultingPackage: local :=
    -- use special defaulting handler when dollar non-trivial
    not sameObject?(dollar,domain) and defaultPackageForm? canonicalForm domain
  while finish > start repeat
    do
      -- a. Skip if non-matching arity.
      i := start
      numTableArgs := arrayRef(numvec,i)
      numArgs ~= numTableArgs => nil
      -- b. Skip if predicate untrue.
      i := i + 1
      predIndex := arrayRef(numvec,i)
      predIndex ~= 0 and not testBitVector(predvec,predIndex) => nil
      -- c. Skip if differing signature.
      i := i + 1
      loc := newCompareSig(sig,numvec,i,dollar,domain)
      null loc => nil  --signifies no match
      -- d. Should we consider for inherited operator?
      loc = 1 => someMatch := true
      -- e. Operator may be subsumed?
      loc = 0 =>
        start := start + numTableArgs + 4
        i := start + 2
        someMatch := true --mark so that if subsumption fails, look for original
        subsumptionSig :=
          [newExpandTypeSlot(arrayRef(numvec,i + j),
            dollar,domain) for j in 0..numTableArgs]
        if $monitorNewWorld then
          sayBrightly [formatOpSignature(op,sig),'"--?-->",
            formatOpSignature(op,subsumptionSig)]
      slot := domainRef(domain,loc)
      cons? slot =>
        slot.op is 'newGoGet => someMatch := true
                   --treat as if operation were not there
        return (success := slot)
      systemError '"unexpected format"
    start := start + numTableArgs + 4
  success isnt 'failed and success =>
    if $monitorNewWorld then
      sayLooking1('"<----",uu) where uu() ==
        cons? success => [first success,:devaluate rest success]
        success
    success
  subsumptionSig ~= nil
    and (u := basicLookup(op,subsumptionSig,domain,dollar)) => u
  flag or someMatch ~= nil => newLookupInAddChain(op,sig,domain,dollar)
  nil
 
--=======================================================
--       Lookup Addlist (from lookupInDomainTable or lookupInDomain)
--=======================================================
newLookupInAddChain(op,sig,addFormDomain,dollar) ==
  if $monitorNewWorld then sayLooking1('"looking up add-chain: ",addFormDomain)
  addFunction:=newLookupInDomain(op,sig,addFormDomain,dollar,5)
  addFunction =>
    if $monitorNewWorld then
      sayLooking1(concat('"<----add-chain function found for ",
        form2String devaluate addFormDomain,'"<----"),rest addFunction)
    addFunction
  nil
 
--=======================================================
--   Lookup In Domain (from lookupInAddChain)
--=======================================================
newLookupInDomain(op,sig,addFormDomain,dollar,index) ==
  addFormCell := addFormDomain.index =>
    integer? KAR addFormCell =>
      or/[newLookupInDomain(op,sig,addFormDomain,dollar,i) for i in addFormCell]
    if not vector? addFormCell then
      lazyDomainSet(addFormCell,addFormDomain,index)
    lookupInDomainVector(op,sig,addFormDomain.index,dollar)
  nil
 
--=======================================================
--       Category Default Lookup (from goGet or lookupInAddChain)
--=======================================================
newLookupInCategories(op,sig,dom,dollar) ==
  slot4 := domainData dom 
  catVec := second slot4
  # catVec = 0 => nil                      --early exit if no categories
  integer? KDR canonicalForm catVec =>
    newLookupInCategories1(op,sig,dom,dollar) --old style
  $lookupDefaults : local := false
  if $monitorNewWorld then sayBrightly concat('"----->",
    form2String devaluate dom,'"-----> searching default packages for ",op)
  predvec := domainPredicates dom
  packageVec := first slot4
--the next three lines can go away with new category world
  varList := ['$,:$FormalMapVariableList]
  valueList := [dom,:[domainRef(dom,5+i) for i in 1..(# rest dom.0)]]
  valueList := [MKQ val for val in valueList]
  nsig := MSUBST(canonicalForm dom,canonicalForm dollar,sig)
  for i in 0..maxIndex packageVec |
       (entry := vectorRef(packageVec,i)) and entry isnt 'T repeat
    package :=
      vector? entry =>
         if $monitorNewWorld then
           sayLooking1('"already instantiated cat package",entry)
         entry
      ident? entry =>
        cat := vectorRef(catVec,i)
        packageForm := nil
        if property(entry,'LOADED) = nil then loadLib entry
        infovec := property(entry,'infovec)
        success :=
          [.,opvec,:.] := infovec
          max := maxIndex opvec
          code := getOpCode(op,opvec,max)
          null code => nil
          [.,.,.,[.,.,.,:byteVector],:.] := infovec
          endPos :=
            code + 2 > max => # byteVector
            vectorRef(opvec,code+2)
          not nrunNumArgCheck(#sig.source,byteVector,opvec.code,endPos) => nil
          packageForm := [entry,'$,:rest cat]
          package := evalSlotDomain(packageForm,dom)
          vectorRef(packageVec,i) := package
          package
        success = nil =>
          if $monitorNewWorld then
            sayBrightlyNT '"  not in: "
            pp (packageForm and devaluate package or entry)
          nil
        if $monitorNewWorld then
          sayLooking1('"candidate default package instantiated: ",success)
        success
      entry
    null package => nil
    if $monitorNewWorld then
      sayLooking1('"Looking at instantiated package ",package)
    res := basicLookup(op,sig,package,dollar) =>
      if $monitorNewWorld then
        sayBrightly '"candidate default package succeeds"
      return res
    if $monitorNewWorld then
      sayBrightly '"candidate fails -- continuing to search categories"
    nil
 
nrunNumArgCheck(num,bytevec,start,finish) ==
   args := arrayRef(bytevec,start)
   num = args => true
   (start := start + args + 4) = finish => nil
   nrunNumArgCheck(num,bytevec,start,finish)
 
newLookupInCategories1(op,sig,dom,dollar) ==
  $lookupDefaults : local := false
  if $monitorNewWorld then sayBrightly concat('"----->",
    form2String devaluate dom,'"-----> searching default packages for ",op)
  predvec := domainPredicates dom
  slot4 := domainData dom
  packageVec := first slot4
  catVec := second slot4
  --the next three lines can go away with new category world
  varList := ['$,:$FormalMapVariableList]
  valueList := [dom,:[domainRef(dom,5+i) for i in 1..(#instantiationArgs dom)]]
  valueList := [MKQ val for val in valueList]
  nsig := MSUBST(canonicalForm dom,canonicalForm dollar,sig)
  for i in 0..maxIndex packageVec | (entry := vectorRef(packageVec,i))
      and (vector? entry or (predIndex := rest (node := catVec.i)) and
          (predIndex = 0 or testBitVector(predvec,predIndex))) repeat
    package :=
      vector? entry =>
         if $monitorNewWorld then
           sayLooking1('"already instantiated cat package",entry)
         entry
      ident? entry =>
        cat := first node
        packageForm := nil
        if not property(entry,'LOADED) then loadLib entry
        infovec := property(entry,'infovec)
        success :=
          vector? infovec =>
            opvec := infovec.1
            max := maxIndex opvec
            code := getOpCode(op,opvec,max)
            null code => nil
            byteVector := CDDR infovec.3
            numOfArgs := arrayRef(byteVector,opvec.code)
            numOfArgs ~= #sig.source => nil
            packageForm := [entry,'$,:rest cat]
            package := evalSlotDomain(packageForm,dom)
            vectorRef(packageVec,i) := package
            package
          table := tableValue($Slot1DataBase,entry) or systemError nil
          (u := LASSQ(op,table))
            and (v := or/[rest x for x in u | #sig = #x.0]) =>
              packageForm := [entry,'$,:rest cat]
              package := evalSlotDomain(packageForm,dom)
              vectorRef(packageVec,i) := package
              package
          nil
        not success =>
          if $monitorNewWorld then
            sayBrightlyNT '"  not in: "
            pp (packageForm and devaluate package or entry)
          nil
        if $monitorNewWorld then
          sayLooking1('"candidate default package instantiated: ",success)
        success
      entry
    null package => nil
    if $monitorNewWorld then
      sayLooking1('"Looking at instantiated package ",package)
    res := lookupInDomainVector(op,sig,package,dollar) =>
      if $monitorNewWorld then
        sayBrightly '"candidate default package succeeds"
      return res
    if $monitorNewWorld then
      sayBrightly '"candidate fails -- continuing to search categories"
    nil
 
--=======================================================
--         Compare Signature to One Derived from Table
--=======================================================
newCompareSig(sig, numvec, index, dollar, domain) ==
  k := index
  null (target := first sig)
   or lazyMatchArg(target,arrayRef(numvec,k),dollar,domain) =>
     and/[lazyMatchArg(s,arrayRef(numvec,k := i),dollar,domain)
              for s in rest sig for i in (index+1)..] =>
                    arrayRef(numvec,k + 1)
     nil
  nil
 
--=======================================================
--     Compare Signature to One Derived from Table
--=======================================================
lazyMatchArg(s,a,dollar,domain) == lazyMatchArg2(s,a,dollar,domain,true)
 
lazyMatchArg2(s,a,dollar,domain,typeFlag) ==
  if s is '$ then
    s := devaluate dollar -- calls from HasCategory can have $s
  integer? a =>
    not typeFlag => s = domainRef(domain,a)
    a = 6 and $isDefaultingPackage => s = devaluate dollar
    d := domainVal(dollar,domain,a)
    vector? d =>
      s = canonicalForm d => true
      domainArg := ($isDefaultingPackage => domain.6.0; domain.0)
      KAR s = canonicalForm(d).op and
        lazyMatchArgDollarCheck(replaceSharpCalls s,d.0,dollar.0,domainArg)
    lazyMatch(replaceSharpCalls s,d,dollar,domain)       --new style
  a is '$ => s = devaluate dollar
  a is "$$" => s = devaluate domain
  string? a =>
    string? s => a = s
    s is ['QUOTE,y] and PNAME y = a
    ident? s and symbolName s = a
  a isnt [.,:.] =>  a = s
  op := a.op
  op is 'NRTEVAL => s = nrtEval(second a,domain)
  op is 'QUOTE => s = second a
  lazyMatch(s,a,dollar,domain)
  --above line is temporarily necessary until system is compiled 8/15/90
--s = a

++ Return true if the symbol `s' designates a generalized builtin
++ constructor, that is a builtin constructor or any operator we
++ deem as a constructor from the domain slot-filling machinery perspective.
generalizedBuiltinConstructor? s ==
  builtinConstructor? s or s is "QUOTE" or s is "[||]"

lazyMatch(source,lazyt,dollar,domain) ==
  lazyt is [op,:argl] and cons? source and op=first source
    and #(sargl := rest source) = #argl =>
      builtinConstructor? op and first argl is [":",:.] =>
        and/[stag = atag and lazyMatchArg(s,a,dollar,domain)
              for [.,stag,s] in sargl for [.,atag,a] in argl]
      generalizedBuiltinConstructor? op =>
         and/[lazyMatchArg(s,a,dollar,domain) for s in sargl for a in argl]
      coSig := getDualSignatureFromDB op
      null coSig => error ["bad Constructor op", op]
      and/[lazyMatchArg2(s,a,dollar,domain,flag)
           for s in sargl for a in argl for flag in rest coSig]
  string? source and lazyt is ['QUOTE,=source] => true
  integer? source =>
      lazyt is ['_#, slotNum] => source = #(domain.slotNum)
      lazyt is ['%call,f,slotNum] and f in '(LENGTH %llength) =>
        source = #(domain.slotNum)
      nil

  -- A hideous hack on the same lines as the previous four lines JHD/MCD
  source is ['construct,:l] => l = lazyt
  nil

 
lazyMatchArgDollarCheck(s,d,dollarName,domainName) ==
  #s ~= #d => nil
  scoSig := getDualSignatureFromDB opOf s or return nil
  if opOf s in '(Union Mapping Record) then 
     scoSig := [true for x in s]
  and/[fn for x in rest s for arg in rest d for xt in rest scoSig] where
   fn() ==
    x = arg => true
    x is ['elt,someDomain,opname] => lookupInDomainByName(opname,evalDomain someDomain,arg)
    x is '$ and (arg = dollarName or arg = domainName) => true
    x = dollarName and arg = domainName => true
    x isnt [.,:.] or arg isnt [.,:.] => false
    xt and first x = first arg =>
      lazyMatchArgDollarCheck(x,arg,dollarName,domainName)
    false

lookupInDomainByName(op,domain,arg) ==
  arg isnt [.,:.] => nil
  opvec := domainOperatorTable domain
  numvec := getDomainByteVector domain
  predvec := domainPredicates domain
  max := maxIndex opvec
  k := getOpCode(op,opvec,max) or return nil
  idxmax := maxIndex numvec
  start := vectorRef(opvec,k)
  finish :=
    max > k => vectorRef(opvec,k + 2)
    idxmax
  if finish > idxmax then systemError '"limit too large"
  success := false
  while finish > start repeat
    i := start
    numberOfArgs := arrayRef(numvec,i)
    predIndex := arrayRef(numvec,i := i + 1)
    predIndex ~= 0 and not testBitVector(predvec,predIndex) => nil
    slotIndex := arrayRef(numvec,i + 2 + numberOfArgs)
    newStart := start + numberOfArgs + 4
    slot := domainRef(domain,slotIndex)
    cons? slot and sameObject?(first slot,first arg) and sameObject?(rest slot,rest arg) => return (success := true)
    start := start + numberOfArgs + 4
  success
 
--=======================================================
--        Expand Signature from Encoded Slot Form
--=======================================================
newExpandTypeSlot(slot, dollar, domain) ==
-- returns domain form for dollar.slot
   newExpandLocalType(sigDomainVal(dollar, domain, slot), dollar,domain)
 
newExpandLocalType(lazyt,dollar,domain) ==
  vector? lazyt => canonicalForm lazyt
  lazyt isnt [.,:.] => lazyt
  lazyt is [vec,.,:lazyForm] and vector? vec =>              --old style
    newExpandLocalTypeForm(lazyForm,dollar,domain)
  newExpandLocalTypeForm(lazyt,dollar,domain)             --new style
 
newExpandLocalTypeForm([functorName,:argl],dollar,domain) ==
  functorName is ":" =>
    [":",first argl,newExpandLocalTypeArgs(second argl,dollar,domain,true)]
  functorName is "[||]" =>
    [functorName,newExpandLocalTypeArgs(first argl,dollar,domain,true)]
  functorName is "QUOTE"  => [functorName,:argl]
  builtinConstructor? functorName =>
    [functorName,:[newExpandLocalTypeArgs(a,dollar,domain,true) for a in argl]]
  coSig := getDualSignatureFromDB functorName or
     error ["unknown constructor name", functorName]
  [functorName,:[newExpandLocalTypeArgs(a,dollar,domain,flag)
        for a in argl for flag in rest coSig]]
 
newExpandLocalTypeArgs(u,dollar,domain,typeFlag) ==
  u is '$ => u
  integer? u =>
     typeFlag => newExpandTypeSlot(u, dollar,domain)
     domainRef(domain,u)
  u is ['NRTEVAL,y] => nrtEval(y,domain)
  u is ['QUOTE,y] => y
  u is "$$" => canonicalForm domain
  u isnt [.,:.] => u   --can be first, rest, etc.
  newExpandLocalTypeForm(u,dollar,domain)
 
nrtEval(expr,dom) ==
  $: local := dom             --??? this should be a substitute
  eval expr
 
domainVal(dollar,domain,index) ==
--returns a domain or a lazy slot
  index = 0 => dollar
  index = 2 => domain
  domainRef(domain,index)

-- ??? This function should be merged into the preceding one. 
sigDomainVal(dollar,domain,index) ==
--returns a domain or a lazy slot
  index = 0 => "$"
  index = 2 => domain
  domainRef(domain,index)

--=======================================================
--          Convert Lazy Domain to Domain Form
--=======================================================
 
lazyDomainSet(lazyForm,thisDomain,slot) ==
  form :=
    lazyForm is [vec,.,:u] and vector? vec => u        --old style
    lazyForm                                        --new style
  slotDomain := evalSlotDomain(form,thisDomain)
  if $monitorNewWorld then
    sayLooking1(concat(form2String devaluate thisDomain,
      '" activating lazy slot ",slot,'": "),slotDomain)
  name := first form
  domainRef(thisDomain,slot) := slotDomain
 

++ Return a type form where all niladic constructors are
++ resolved to constructor calls.  Note: it is assumed that no
++ such resolution has already occured.
resolveNiladicConstructors form ==
  ident? form and niladicConstructorFromDB form => [form]
  form isnt [.,:.] => form
  form is ["QUOTE",:.] => form
  for args in tails rest form repeat
    args.first := resolveNiladicConstructors first args
  form

--=======================================================
--                   HasCategory/Attribute
--=======================================================
-- PLEASE NOTE: This function has the rather charming side-effect that
-- e.g. it works if domform is an Aldor Category.  This is being used
-- by extendscategoryForm in c-util to allow Aldor domains to be used
-- in spad code.  Please do not break this!  An example is the use of
-- Interval (an Aldor domain) by SIGNEF in limitps.spad.  MCD.
newHasTest(domform,catOrAtt) ==
  catOrAtt is '(Type) => true
  cons? domform and builtinFunctorName? domform.op =>
    ofCategory(domform,catOrAtt)
  op := opOf catOrAtt
  isAtom := catOrAtt isnt [.,:.]
  not isAtom and op is 'Join =>
    and/[newHasTest(domform,x) for x in rest catOrAtt]
-- we will refuse to say yes for 'Cat has Cat'
--getConstructorKindFromDB opOf domform = "category" => throwKeyedMsg("S2IS0025",nil)
-- on second thoughts we won't!
  categoryForm? domform =>
      domform = catOrAtt => 'T
      for [aCat,:cond] in [:ancestorsOf(domform,nil),:applySubst(pairList($FormalMapVariableList,rest domform),getConstructorAttributesFromDB(opOf domform))] |  aCat = catOrAtt  repeat
         return evalCond cond where
           evalCond x ==
             x isnt [.,:.] => x
             [pred,:l] := x
             pred = "has" => 
                  l is [ w1,['ATTRIBUTE,w2]] => newHasTest(w1,w2) 
                  l is [ w1,['SIGNATURE,:w2]] => compiledLookup(first w2,second w2, eval mkEvalable w1)
                  newHasTest(first  l ,second l) 
             pred in '(OR or %or) => or/[evalCond i for i in l]
             pred in '(AND and %and) => and/[evalCond i for i in l]
             x  
  not isAtom and categoryForm? catOrAtt  =>
    domain := eval mkEvalable domform
    newHasCategory(domain,catOrAtt)
  catOrAtt is [":",op,type] =>
    sig := 
      type is ["Mapping",:sig'] =>
         for ts in tails sig' repeat
           ts.first := resolveNiladicConstructors first ts
         sig'
      -- a constant; make it look like op: () -> type
      [resolveNiladicConstructors type]
    HasSignature(evalDomain domform, [op,sig])
  newHasAttribute(eval mkEvalable domform,catOrAtt)
 
lazyMatchAssocV(x,auxvec,catvec,domain) ==      --new style slot4
  n := maxIndex catvec
  xop := first x
  or/[vectorRef(auxvec,i) for i in 0..n |
    xop = first (lazyt := vectorRef(catvec,i)) and lazyMatch(x,lazyt,domain,domain)]
 
lazyMatchAssocV1(x,vec,domain) ==               --old style slot4
  n  := maxIndex vec
  xop := first x
  or/[rest vectorRef(vec,i) for i in 0..n |
    xop = first (lazyt := first vectorRef(vec,i)) and lazyMatch(x,lazyt,domain,domain)]
 
--=======================================================
--                   Utility Functions
--=======================================================
 
sayLooking(prefix,op,sig,dom) ==
  $monitorNewWorld := false
  dollar := devaluate dom
  dollar isnt [.,:.] or vector? dollar or "or"/[vector? x for x in dollar] => systemError nil
  sayBrightly
    concat(prefix,formatOpSignature(op,sig),bright '"from ",form2String dollar)
  $monitorNewWorld := true
 
sayLooking1(prefix,dom) ==
  $monitorNewWorld := false
  dollar :=
    vector? dom => devaluate dom
    devaluateList dom
  sayBrightly concat(prefix,form2String dollar)
  $monitorNewWorld := true
 
cc() == -- don't remove this function
  clearConstructorCaches()
  clearClams()