aboutsummaryrefslogtreecommitdiff
path: root/src/interp/i-intern.boot
blob: 11ff1a4af81f976d5350d2697066b489818e429e (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
-- Copyright (C) 1991-2002, The Numerical Algorithms Group Ltd.
-- All rights reserved.
-- Copyright (C) 2007-2008, 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 i_-object
import ptrees
namespace BOOT

$useParserSrcPos :=  NIL
$transferParserSrcPos := NIL

--  Making Trees

mkAtree x ==
  -- maker of attrib tree from parser form
  mkAtree1 mkAtreeExpandMacros x

mkAtreeWithSrcPos(form, posnForm) ==
    posnForm and $useParserSrcPos => pf2Atree(posnForm)
    transferSrcPosInfo(posnForm, mkAtree form)

mkAtree1WithSrcPos(form, posnForm) ==
  transferSrcPosInfo(posnForm, mkAtree1 form)

mkAtreeNodeWithSrcPos(form, posnForm) ==
  transferSrcPosInfo(posnForm, mkAtreeNode form)

transferSrcPosInfo(pf, atree) ==
    not (pf and $transferParserSrcPos) => atree
    pos := pfPosOrNopos(pf)
    pfNoPosition?(pos) => atree

    -- following is a hack because parser code for getting filename
    -- seems wrong.
    fn := lnPlaceOfOrigin poGetLineObject(pos)
    if NULL fn or fn = '"strings" then fn := '"console"

    putSrcPos(atree, fn, pfSourceText(pf), pfLinePosn(pos), pfCharPosn(pos))
    atree

mkAtreeExpandMacros x ==
  -- handle macro expansion. if the macros have args we require that
  -- we match the correct number of args
  if x isnt ["MDEF",:.] and x isnt ["DEF",["macro",:.],:.] then
    atom x and (m := isInterpMacro x) =>
      [args,:body] := m
      args => "doNothing"
      x := body
    x is [op,:argl] =>
      op = "QUOTE" => "doNothing"
      op = "where" and argl is [before,after] =>
        -- in a where clause, what follows "where" (the "after" parm
        -- above) might be a local macro, so do not expand the "before"
        -- part yet
        x := [op,before,mkAtreeExpandMacros after]
      argl := [mkAtreeExpandMacros a for a in argl]
      (m := isInterpMacro op) =>
        [args,:body] := m
        #args = #argl =>
          sl := [[a,:s] for a in args for s in argl]
          x := SUBLISNQ(sl,body)
        null args => x := [body,:argl]
        x := [op,:argl]
      x := [mkAtreeExpandMacros op,:argl]
  x

mkAtree1 x ==
  -- first special handler for making attrib tree
  null x => throwKeyedMsg("S2IP0005",['"NIL"])
  VECP x => x
  atom x =>
    x in '(%noBranch %noMapVal) => x
    x in '(nil true false) => mkAtree2([x],x,NIL)
    x = '_/throwAway =>
      -- don't want to actually compute this
      tree := mkAtree1 '(void)
      putValue(tree,objNewWrap(voidValue(),$Void))
      putModeSet(tree,[$Void])
      tree
    getBasicMode x =>
      v := mkAtreeNode $immediateDataSymbol
      putValue(v,getBasicObject x)
      v
    IDENTP x => mkAtreeNode x
    keyedSystemError("S2II0002",[x])
  x is [op,:argl] => mkAtree2(x,op,argl)
  systemErrorHere '"mkAtree1"

-- mkAtree2 and mkAtree3 were created because mkAtree1 got so big

mkAtree2(x,op,argl) ==
  nargl := #argl
  (op= "-") and (nargl = 1) and (INTEGERP CAR argl) =>
    mkAtree1(MINUS CAR argl)
  op=":" and argl is [y,z] => [mkAtreeNode "Declare",:argl]
  op="COLLECT" => [mkAtreeNode op,:transformCollect argl]
  op= "break" =>
    argl is [.,val] =>
      if val = '$NoValue then val := '(void)
      [mkAtreeNode op,mkAtree1 val]
    [mkAtreeNode op,mkAtree1 '(void)]
  op= "return" =>
    argl is [val] =>
      if val = '$NoValue then val := '(void)
      [mkAtreeNode op,mkAtree1 val]
    [mkAtreeNode op,mkAtree1 '(void)]
  op="exit" => mkAtree1 CADR argl
  op = "QUOTE" => [mkAtreeNode op,:argl]
  op="SEGMENT" =>
    argl is [a] => [mkAtreeNode op, mkAtree1 a]
    z :=
      null argl.1 => nil
      mkAtree1 argl.1
    [mkAtreeNode op, mkAtree1 argl.0,z]
  op in '(pretend is isnt) =>
    [mkAtreeNode op,mkAtree1 first argl,:rest argl]
  op =  "::" =>
    [mkAtreeNode "COERCE",mkAtree1 first argl,CADR argl]
  x is ["@", expr, type] =>
    t := evaluateType unabbrev type
    t = $DoubleFloat and expr is [['_$elt, =$Float, 'float], :args] =>
        mkAtree1 [['_$elt, $DoubleFloat, 'float], :args]
    t = $DoubleFloat and INTEGERP expr =>
        v := mkAtreeNode $immediateDataSymbol
        putValue(v,getBasicObject float expr)
        v
    t = $Float and INTEGERP expr =>
        mkAtree1 ["::", expr, t]
    typeIsASmallInteger(t) and INTEGERP expr =>
        mkAtree1 ["::", expr, t]
    [mkAtreeNode 'TARGET,mkAtree1 expr, type]
  (op="case") and (nargl = 2)  =>
    [mkAtreeNode "case",mkAtree1 first argl,unabbrev CADR argl]
  op="REPEAT" => [mkAtreeNode op,:transformREPEAT argl]
  op="%LET" and argl is [['construct,:.],rhs] =>
    [mkAtreeNode "%LET",first argl,mkAtree1 rhs]
  op="%LET" and argl is [[":",a,.],rhs] =>
    mkAtree1 ["SEQ",first argl,["%LET",a,rhs]]
  op is ['_$elt,D,op1] =>
    op1 is "=" =>
      a' := [mkAtreeNode '_=,:[mkAtree1 arg for arg in argl]]
      [mkAtreeNode "Dollar",D,a']
    [mkAtreeNode "Dollar",D,mkAtree1 [op1,:argl]]
  op='_$elt =>
    argl is [D,a] =>
      INTEGERP a =>
        a = 0 => mkAtree1 [['_$elt,D,'Zero]]
        a = 1 => mkAtree1 [['_$elt,D,'One]]
        t := evaluateType unabbrev [D]
        typeIsASmallInteger(t) and SINTP a =>
            v := mkAtreeNode $immediateDataSymbol
            putValue(v,objNewWrap(a, t))
            v
        mkAtree1 ["*",a,[['_$elt,D,'One]]]
      [mkAtreeNode "Dollar",D,mkAtree1 a]
    keyedSystemError("S2II0003",['"$",argl,
      '"not qualifying an operator"])
  mkAtree3(x,op,argl)

mkAtree3(x,op,argl) ==
  op="REDUCE" and argl is [op1,axis,body] =>
    [mkAtreeNode op,axis,mkAtree1 op1,mkAtree1 body]
  op="has" => [mkAtreeNode op, :argl]
  op="|" => [mkAtreeNode "AlgExtension",:[mkAtree1 arg for arg in argl]]
  op="=" => [mkAtreeNode "equation",:[mkAtree1 arg for arg in argl]]
  op="not" and argl is [["=",lhs,rhs]] =>
    [mkAtreeNode "not",[mkAtreeNode "=",mkAtree1 lhs,mkAtree1 rhs]]
  op="in" and argl is [var ,["SEGMENT",lb,ul]] =>
    upTest:=
      null ul => NIL
      mkLessOrEqual(var,ul)
    lowTest:=mkLessOrEqual(lb,var)
    z :=
      ul => ['and,lowTest,upTest]
      lowTest
    mkAtree1 z
  x is ["IF",p,"%noBranch",a] => mkAtree1 ["IF",["not",p],a,"%noBranch"]
  x is ["RULEDEF",:.] => [mkAtreeNode "RULEDEF",:CDR x]
  x is ["MDEF",sym,junk1,junk2,val] =>
    -- new macros look like  macro f ==  or macro f(x) ===
    -- so transform into that format
    mkAtree1 ["DEF",["macro",sym],junk1,junk2,val]
  x is ["+->",funargs,funbody] =>
    if funbody is [":",body,type] then
      types := [type]
      funbody := body
    else types := [NIL]
    v := collectDefTypesAndPreds funargs
    types := [:types,:v.1]
    [mkAtreeNode "ADEF",[v.0,types,[NIL for a in types],funbody],
      if v.2 then v.2 else true, false]
  x is ['ADEF,arg,:r] =>
    r := mkAtreeValueOf r
    v :=
      null arg => VECTOR(NIL,NIL,NIL)
      PAIRP arg and rest arg and first arg^= "|" =>
        collectDefTypesAndPreds ["tuple",:arg]
      null rest arg => collectDefTypesAndPreds first arg
      collectDefTypesAndPreds arg
    [types,:r'] := r
    at := [fn(x,y) for x in rest types for y in v.1]
    r := [[first types,:at],:r']
    [mkAtreeNode "ADEF",[v.0,:r],if v.2 then v.2 else true,false]
  x is ["where",before,after] =>
    [mkAtreeNode "where",before,mkAtree1 after]
  x is ["DEF",["macro",form],.,.,body] =>
    [mkAtreeNode "MDEF",form,body]
  x is ["DEF",a,:r] =>
    r := mkAtreeValueOf r
    a is [op,:arg] =>
      v :=
        null arg => VECTOR(NIL,NIL,NIL)
        PAIRP arg and rest arg and first arg^= "|" =>
          collectDefTypesAndPreds ["tuple",:arg]
        null rest arg => collectDefTypesAndPreds first arg
        collectDefTypesAndPreds arg
      [types,:r'] := r
      -- see case for ADEF above for defn of fn
      at := [fn(x,y) for x in rest types for y in v.1]
      r := [[first types,:at],:r']
      [mkAtreeNode 'DEF,[[op,:v.0],:r],if v.2 then v.2 else true,false]
    [mkAtreeNode 'DEF,[a,:r],true,false]
  op="[||]" => [mkAtreeNode op, :argl]
  op in '(%Inline %With %Add %Export) => [mkAtreeNode op,:argl]
--x is ['when,y,pred] =>
--  y isnt ['DEF,a,:r] =>
--    keyedSystemError("S2II0003",['"when",y,'"improper argument form"])
--  a is [op,p1,:pr] =>
--    null pr => mkAtree1 ['DEF,[op,["|",p1,pred]],:r]
--    mkAtree1 ['DEF,[op,["|",["tuple",p1,:pr],pred]],:r]
--  [mkAtreeNode 'DEF, CDR y,pred,false]
--x is ['otherwise,u] =>
--  throwMessage '"   otherwise is no longer supported."
  z :=
    getBasicMode op =>
      v := mkAtreeNode $immediateDataSymbol
      putValue(v,getBasicObject op)
      v
    atom op => 
      t := mkAtreeNode op
      putAtree(t, 'flagArgsPos, flagArguments(op,#argl))
      t
    mkAtree1 op
  -- this is a general form handled by modemap selection.  Be
  -- careful not to evaluate arguments that are not meant to.
  flagArgPos := getFlagArgsPos z
  [z,:[buildTreeForOperand for y in argl for i in 0..]] where
           buildTreeForOperand() ==
             flagArgPos and flagArgPos.i > 0 =>
               y' := parseTransform postTransform y
               a := mkAtreeNode $immediateDataSymbol
               m := quasiquote y'
               putMode(a, m)
               putValue(a, objNewWrap(MKQ y',m))
               putModeSet(a, [m])
               a
             mkAtree1 y

 where
  fn(a,b) ==
    a and b =>
      if a = b then a
      else throwMessage '"   double declaration of parameter"
    a or b

++ Check if op accepts flag arguments.  If so, returns a vector whose
++ positive entry indicates that modemaps for `op' takes flag arguments
++ in that position.
flagArguments(op, nargs) ==
  v := GETZEROVEC nargs
  sigs := [signatureFromModemap m for m in getModemapsFromDatabase(op, nargs)]
  checkCallingConvention(sigs, nargs)

++ Extract the signature of modemap `m'.
signatureFromModemap m ==
  [sig,pred,:.]  := m
  pred = true => rest sig
  car pred = "AND" =>
    sl := [[a,:b] for [.,a,b] in cdr pred]
    rest SUBLIS(sl,sig)
  
collectDefTypesAndPreds args ==
  -- given an arglist to a DEF-like form, this function returns
  -- a vector of three things:
  --   slot 0: just the variables
  --   slot 1: the type declarations on the variables
  --   slot 2: a predicate for all arguments
  pred := types := vars := NIL
  junk :=
    IDENTP args =>
      types := [NIL]
      vars  := [args]
    args is [":",var,type] =>
      types := [type]
      var is ["|",var',p] =>
        vars := [var']
        pred := addPred(pred,p)
      vars := [var]
    args is ["|",var,p] =>
      pred := addPred(pred,p)
      var is [":",var',type] =>
        types := [type]
        vars := [var']
      var is ["tuple",:.] or var is ["|",:.] =>
        v := collectDefTypesAndPreds var
        vars  := [:vars,:v.0]
        types := [:types,:v.1]
        pred  := addPred(pred,v.2)
      vars := [var]
      types := [NIL]
    args is ["tuple",:args'] =>
      for a in args' repeat
        v := collectDefTypesAndPreds a
        vars  := [:vars,first v.0]
        types := [:types,first v.1]
        pred  := addPred(pred,v.2)
    types := [NIL]
    vars  := [args]
  VECTOR(vars,types,pred)
 where
  addPred(old,new) ==
    null new => old
    null old => new
    ['and,old,new]

mkAtreeValueOf l ==
  -- scans for ['valueOf,atom]
  not CONTAINED("valueOf",l) => l
  mkAtreeValueOf1 l

mkAtreeValueOf1 l ==
  null l or atom l or null rest l => l
  l is ["valueOf",u] and IDENTP u =>
    v := mkAtreeNode $immediateDataSymbol
    putValue(v,get(u,"value",$InteractiveFrame) or
      objNewWrap(u,['Variable,u]))
    v
  [mkAtreeValueOf1 x for x in l]

mkLessOrEqual(lhs,rhs) == ["not",["<",rhs,lhs]]

atree2EvaluatedTree x == atree2Tree1(x,true)

atree2Tree1(x,evalIfTrue) ==
  (triple := getValue x) and objMode(triple) ^= $EmptyMode =>
    coerceOrCroak(triple,$OutputForm,$mapName)
  isLeaf x =>
    VECP x => x.0
    x
  [atree2Tree1(y,evalIfTrue) for y in x]

--% Environment Utilities

-- getValueFromEnvironment(x,mode) ==
--   $failure ^= (v := getValueFromSpecificEnvironment(x,mode,$env)) => v
--   $failure ^= (v := getValueFromSpecificEnvironment(x,mode,$e))   => v
--   throwKeyedMsg("S2IE0001",[x])
getValueFromEnvironment(x,mode) ==
  $failure ^= (v := getValueFromSpecificEnvironment(x,mode,$env)) => v
  $failure ^= (v := getValueFromSpecificEnvironment(x,mode,$e))   => v
  null(v := coerceInt(objNew(x, ['Variable, x]), mode)) =>
     throwKeyedMsg("S2IE0001",[x])
  objValUnwrap v

getValueFromSpecificEnvironment(id,mode,e) ==
  PAIRP e =>
    u := get(id,'value,e) =>
      objMode(u) = $EmptyMode =>
        systemErrorHere '"getValueFromSpecificEnvironment"
      v := objValUnwrap u
      mode isnt ['Mapping,:mapSig] => v
      v isnt ['MAP,:.] => v
      v' := coerceInt(u,mode)
      null v' => throwKeyedMsg("S2IC0002",[objMode u,mode])
      objValUnwrap v'

    m := get(id,'mode,e) =>
      -- See if we can make it into declared mode from symbolic form
      -- For example, (x : P[x] I; x + 1)
      if isPartialMode(m) then m' := resolveTM(['Variable,id],m)
      else m' := m
      m' and
        (u := coerceInteractive(objNewWrap(id,['Variable,id]),m')) =>
          objValUnwrap u

      throwKeyedMsg("S2IE0002",[id,m])
    $failure
  $failure

addBindingInteractive(var,proplist,e is [[curContour,:.],:.]) ==
  -- change proplist of var in e destructively
  u := ASSQ(var,curContour) =>
    RPLACD(u,proplist)
    e
  RPLAC(CAAR e,[[var,:proplist],:curContour])
  e

augProplistInteractive(proplist,prop,val) ==
  u := ASSQ(prop,proplist) =>
    RPLACD(u,val)
    proplist
  [[prop,:val],:proplist]

getFlag x == get("--flags--",x,$e)

putFlag(flag,value) ==
  $e := put ("--flags--", flag, value, $e)

getI(x,prop) == get(x,prop,$InteractiveFrame)

putI(x,prop,val) == ($InteractiveFrame := put(x,prop,val,$InteractiveFrame))

getIProplist x == getProplist(x,$InteractiveFrame)

removeBindingI x ==
  RPLAC(CAAR $InteractiveFrame,deleteAssocWOC(x,CAAR $InteractiveFrame))

rempropI(x,prop) ==
  id:=
    atom x => x
    first x
  getI(id,prop) =>
    recordNewValue(id,prop,NIL)
    recordOldValue(id,prop,getI(id,prop))
    $InteractiveFrame:= remprop(id,prop,$InteractiveFrame)

remprop(x,prop,e) ==
  u:= assoc(prop,pl:= getProplist(x,e)) =>
    e:= addBinding(x,DELASC(first u,pl),e)
    e
  e

fastSearchCurrentEnv(x,currentEnv) ==
  u:= QLASSQ(x,CAR currentEnv) => u
  while (currentEnv:= QCDR currentEnv) repeat
    u:= QLASSQ(x,CAR currentEnv) => u

putIntSymTab(x,prop,val,e) ==
  null atom x => putIntSymTab(first x,prop,val,e)
  pl0 := pl := search(x,e)
  pl :=
    null pl => [[prop,:val]]
    u := ASSQ(prop,pl) =>
      RPLACD(u,val)
      pl
    lp := LASTPAIR pl
    u := [[prop,:val]]
    RPLACD(lp,u)
    pl
  EQ(pl0,pl) => e
  addIntSymTabBinding(x,pl,e)

addIntSymTabBinding(var,proplist,e is [[curContour,:.],:.]) ==
  -- change proplist of var in e destructively
  u := ASSQ(var,curContour) =>
    RPLACD(u,proplist)
    e
  RPLAC(CAAR e,[[var,:proplist],:curContour])
  e


transformCollect [:itrl,body] ==
  -- syntactic transformation for COLLECT form, called from mkAtree1
  iterList:=[:iterTran1 for it in itrl] where iterTran1() ==
    it is ["STEP",index,lower,step,:upperList] =>
      [["STEP",index,mkAtree1 lower,mkAtree1 step,:[mkAtree1 upper
        for upper in upperList]]]
    it is ["IN",index,s] =>
      [["IN",index,mkAtree1 s]]
    it is ["ON",index,s] =>
      [['IN,index,mkAtree1 ['tails,s]]]
    it is ["WHILE",b] =>
      [["WHILE",mkAtree1 b]]
    it is ["|",pred] =>
      [["SUCHTHAT",mkAtree1 pred]]
    it is ["UNTIL",:.] => nil
    throwKeyedMsg("S2IS0061",nil)
  bodyTree:=mkAtree1 body
  iterList:=nconc(iterList,[:iterTran2 for it in itrl]) where
    iterTran2() ==
      it is ["STEP",:.] => nil
      it is ["IN",:.] => nil
      it is ["ON",:.] => nil
      it is ["WHILE",:.] => nil
      it is ["UNTIL",b] =>
        [["UNTIL",mkAtree1 b]]
      it is ["|",pred] => nil
  [:iterList,bodyTree]

--%

++ Make a VAT for the symbol `x' and collect all known information
++ about `x' in the current environment into the new VAT.
++ Note: This routine is used in the algebra interface to the interpreter.
mkAtreeForToken: %Symbol -> %Shell
mkAtreeForToken x ==
  t := mkAtreeNode x
  transferPropsToNode(x,t)