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
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - lambda-to-mu.mu</title>
<meta name="Generator" content="Vim/7.4">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="none">
<meta name="settings" content="use_css,pre_wrap,no_foldcolumn,expand_tabs,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #eeeeee; background-color: #080808; }
body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color: #080808; }
* { font-size: 12pt; font-size: 1em; }
.muData { color: #ffff00; }
.muControl { color: #c0a020; }
.Delimiter { color: #800080; }
.Special { color: #c00000; }
.Constant { color: #00a0a0; }
.SalientComment { color: #00ffff; }
.CommentedCode { color: #6c6c6c; }
.Comment { color: #9090ff; }
.muRecipe { color: #ff8700; }
.muScenario { color: #00af00; }
-->
</style>
<script type='text/javascript'>
<!--
-->
</script>
</head>
<body>
<pre id='vimCodeElement'>
<span class="SalientComment">## experimental compiler to translate programs written in a generic</span>
<span class="SalientComment">## expression-oriented language called 'lambda' into mu</span>
<span class="muScenario">scenario</span> convert-lambda [
run [
<span class="Constant">local-scope</span>
<span class="Constant">1</span>:text/<span class="Special">raw <- </span>lambda-to-mu <span class="Constant">[(add a (multiply b c))]</span>
<span class="Constant">2</span>:@:char/<span class="Special">raw <- </span>copy *<span class="Constant">1</span>:text/<span class="Special">raw</span>
]
memory-should-contain [
<span class="Constant">2</span>:@:char<span class="Special"> <- </span><span class="Constant">[t1 <- multiply b c</span>
<span class="Constant">result <- add a t1]</span>
]
]
<span class="muRecipe">def</span> lambda-to-mu in:text<span class="muRecipe"> -> </span>out:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
out<span class="Special"> <- </span>copy <span class="Constant">0</span>
cells:&:cell<span class="Special"> <- </span>parse in
out<span class="Special"> <- </span>to-mu cells
]
<span class="Comment"># 'parse' will turn lambda expressions into trees made of cells</span>
<span class="muData">exclusive-container</span> cell [
atom:text
pair:pair
]
<span class="Comment"># printed below as < first | rest ></span>
<span class="muData">container</span> pair [
first:&:cell
rest:&:cell
]
<span class="muRecipe">def</span> new-atom name:text<span class="muRecipe"> -> </span>result:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
result<span class="Special"> <- </span>new <span class="Constant">cell:type</span>
*result<span class="Special"> <- </span>merge <span class="Constant">0/tag:atom</span>, name
]
<span class="muRecipe">def</span> new-pair a:&:cell, b:&:cell<span class="muRecipe"> -> </span>result:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
result<span class="Special"> <- </span>new <span class="Constant">cell:type</span>
*result<span class="Special"> <- </span>merge <span class="Constant">1/tag:pair</span>, a/first, b/rest
]
<span class="muRecipe">def</span> is-atom? x:&:cell<span class="muRecipe"> -> </span>result:boolean [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="muControl">reply-unless</span> x, <span class="Constant">0/false</span>
_, result<span class="Special"> <- </span>maybe-convert *x, <span class="Constant">atom:variant</span>
]
<span class="muRecipe">def</span> is-pair? x:&:cell<span class="muRecipe"> -> </span>result:boolean [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="muControl">reply-unless</span> x, <span class="Constant">0/false</span>
_, result<span class="Special"> <- </span>maybe-convert *x, <span class="Constant">pair:variant</span>
]
<span class="muScenario">scenario</span> atom-is-not-pair [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[a]</span>
x:&:cell<span class="Special"> <- </span>new-atom s
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-atom? x
<span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>is-pair? x
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">0</span>
]
]
<span class="muScenario">scenario</span> pair-is-not-atom [
<span class="Constant">local-scope</span>
<span class="Comment"># construct (a . nil)</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[a]</span>
x:&:cell<span class="Special"> <- </span>new-atom s
y:&:cell<span class="Special"> <- </span>new-pair x, <span class="Constant">0/nil</span>
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-atom? y
<span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>is-pair? y
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">0</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span>
]
]
<span class="muRecipe">def</span> atom-match? x:&:cell, pat:text<span class="muRecipe"> -> </span>result:boolean [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
s:text, is-atom?:boolean<span class="Special"> <- </span>maybe-convert *x, <span class="Constant">atom:variant</span>
<span class="muControl">reply-unless</span> is-atom?, <span class="Constant">0/false</span>
result<span class="Special"> <- </span>equal pat, s
]
<span class="muScenario">scenario</span> atom-match [
<span class="Constant">local-scope</span>
x:&:cell<span class="Special"> <- </span>new-atom <span class="Constant">[abc]</span>
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>atom-match? x, <span class="Constant">[abc]</span>
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span>
]
]
<span class="muRecipe">def</span> first x:&:cell<span class="muRecipe"> -> </span>result:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
pair:pair, pair?:boolean<span class="Special"> <- </span>maybe-convert *x, <span class="Constant">pair:variant</span>
<span class="muControl">reply-unless</span> pair?, <span class="Constant">0/nil</span>
result<span class="Special"> <- </span>get pair, <span class="Constant">first:offset</span>
]
<span class="muRecipe">def</span> rest x:&:cell<span class="muRecipe"> -> </span>result:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
pair:pair, pair?:boolean<span class="Special"> <- </span>maybe-convert *x, <span class="Constant">pair:variant</span>
<span class="muControl">reply-unless</span> pair?, <span class="Constant">0/nil</span>
result<span class="Special"> <- </span>get pair, <span class="Constant">rest:offset</span>
]
<span class="muRecipe">def</span> set-first base:&:cell, new-first:&:cell<span class="muRecipe"> -> </span>base:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
pair:pair, is-pair?:boolean<span class="Special"> <- </span>maybe-convert *base, <span class="Constant">pair:variant</span>
<span class="muControl">reply-unless</span> is-pair?
pair<span class="Special"> <- </span>put pair, <span class="Constant">first:offset</span>, new-first
*base<span class="Special"> <- </span>merge <span class="Constant">1/pair</span>, pair
]
<span class="muRecipe">def</span> set-rest base:&:cell, new-rest:&:cell<span class="muRecipe"> -> </span>base:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
pair:pair, is-pair?:boolean<span class="Special"> <- </span>maybe-convert *base, <span class="Constant">pair:variant</span>
<span class="muControl">reply-unless</span> is-pair?
pair<span class="Special"> <- </span>put pair, <span class="Constant">rest:offset</span>, new-rest
*base<span class="Special"> <- </span>merge <span class="Constant">1/pair</span>, pair
]
<span class="muScenario">scenario</span> cell-operations-on-atom [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[a]</span>
x:&:cell<span class="Special"> <- </span>new-atom s
<span class="Constant">10</span>:&:cell/<span class="Special">raw <- </span>first x
<span class="Constant">11</span>:&:cell/<span class="Special">raw <- </span>rest x
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># first is nil</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># rest is nil</span>
]
]
<span class="muScenario">scenario</span> cell-operations-on-pair [
<span class="Constant">local-scope</span>
<span class="Comment"># construct (a . nil)</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[a]</span>
x:&:cell<span class="Special"> <- </span>new-atom s
y:&:cell<span class="Special"> <- </span>new-pair x, <span class="Constant">0/nil</span>
x2:&:cell<span class="Special"> <- </span>first y
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>equal x, x2
<span class="Constant">11</span>:&:cell/<span class="Special">raw <- </span>rest y
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># first is correct</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># rest is nil</span>
]
]
<span class="SalientComment">## convert lambda text to a tree of cells</span>
<span class="muRecipe">def</span> parse in:text<span class="muRecipe"> -> </span>out:&:cell [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
s:&:stream:char<span class="Special"> <- </span>new-stream in
out, s<span class="Special"> <- </span>parse s
trace <span class="Constant">2</span>, <span class="Constant">[app/parse]</span>, out
]
<span class="muRecipe">def</span> parse in:&:stream:char<span class="muRecipe"> -> </span>out:&:cell, in:&:stream:char [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Comment"># skip whitespace</span>
in<span class="Special"> <- </span>skip-whitespace in
c:char, eof?:boolean<span class="Special"> <- </span>peek in
<span class="muControl">reply-if</span> eof?, <span class="Constant">0/nil</span>
pair?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">40/open-paren</span>
<span class="Delimiter">{</span>
<span class="muControl">break-if</span> pair?
<span class="Comment"># atom</span>
b:&:buffer<span class="Special"> <- </span>new-buffer <span class="Constant">30</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>end-of-stream? in
<span class="muControl">break-if</span> done?
<span class="Comment"># stop before close paren or space</span>
c:char<span class="Special"> <- </span>peek in
done?<span class="Special"> <- </span>equal c, <span class="Constant">41/close-paren</span>
<span class="muControl">break-if</span> done?
done?<span class="Special"> <- </span>space? c
<span class="muControl">break-if</span> done?
c<span class="Special"> <- </span>read in
b<span class="Special"> <- </span>append b, c
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
s:text<span class="Special"> <- </span>buffer-to-array b
out<span class="Special"> <- </span>new-atom s
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> pair?
<span class="Comment"># pair</span>
read in <span class="Comment"># skip the open-paren</span>
out<span class="Special"> <- </span>new <span class="Constant">cell:type</span> <span class="Comment"># start out with nil</span>
<span class="Comment"># read in first element of pair</span>
<span class="Delimiter">{</span>
end?:boolean<span class="Special"> <- </span>end-of-stream? in
not-end?:boolean<span class="Special"> <- </span>not end?
assert not-end?, <span class="Constant">[unbalanced '(' in expression]</span>
c<span class="Special"> <- </span>peek in
close-paren?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">41/close-paren</span>
<span class="muControl">break-if</span> close-paren?
first:&:cell, in<span class="Special"> <- </span>parse in
*out<span class="Special"> <- </span>merge <span class="Constant">1/pair</span>, first, <span class="Constant">0/nil</span>
<span class="Delimiter">}</span>
<span class="Comment"># read in any remaining elements</span>
curr:&:cell<span class="Special"> <- </span>copy out
<span class="Delimiter">{</span>
in<span class="Special"> <- </span>skip-whitespace in
end?:boolean<span class="Special"> <- </span>end-of-stream? in
not-end?:boolean<span class="Special"> <- </span>not end?
assert not-end?, <span class="Constant">[unbalanced '(' in expression]</span>
<span class="Comment"># termination check: ')'</span>
c<span class="Special"> <- </span>peek in
<span class="Delimiter">{</span>
close-paren?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">41/close-paren</span>
<span class="muControl">break-unless</span> close-paren?
read in <span class="Comment"># skip ')'</span>
<span class="muControl">break</span> <span class="Constant">+end-pair:label</span>
<span class="Delimiter">}</span>
<span class="Comment"># still here? read next element of pair</span>
next:&:cell, in<span class="Special"> <- </span>parse in
is-dot?:boolean<span class="Special"> <- </span>atom-match? next, <span class="Constant">[.]</span>
<span class="Delimiter">{</span>
<span class="muControl">break-if</span> is-dot?
next-curr:&:cell<span class="Special"> <- </span>new-pair next, <span class="Constant">0/nil</span>
curr<span class="Special"> <- </span>set-rest curr, next-curr
curr<span class="Special"> <- </span>rest curr
<span class="Delimiter">}</span>
<span class="Delimiter">{</span>
<span class="muControl">break-unless</span> is-dot?
<span class="Comment"># deal with dotted pair</span>
in<span class="Special"> <- </span>skip-whitespace in
c<span class="Special"> <- </span>peek in
not-close-paren?:boolean<span class="Special"> <- </span>not-equal c, <span class="Constant">41/close-paren</span>
assert not-close-paren?, <span class="Constant">[')' cannot immediately follow '.']</span>
final:&:cell<span class="Special"> <- </span>parse in
curr<span class="Special"> <- </span>set-rest curr, final
<span class="Comment"># we're not gonna update curr, so better make sure the next iteration</span>
<span class="Comment"># is going to end the pair</span>
in<span class="Special"> <- </span>skip-whitespace in
c<span class="Special"> <- </span>peek in
close-paren?:boolean<span class="Special"> <- </span>equal c, <span class="Constant">41/close-paren</span>
assert close-paren?, <span class="Constant">['.' must be followed by exactly one expression before ')']</span>
<span class="Delimiter">}</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
<span class="Constant"> +end-pair</span>
<span class="Delimiter">}</span>
]
<span class="muRecipe">def</span> skip-whitespace in:&:stream:char<span class="muRecipe"> -> </span>in:&:stream:char [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Delimiter">{</span>
done?:boolean<span class="Special"> <- </span>end-of-stream? in
<span class="muControl">reply-if</span> done?, <span class="Constant">0/null</span>
c:char<span class="Special"> <- </span>peek in
space?:boolean<span class="Special"> <- </span>space? c
<span class="muControl">break-unless</span> space?
read in <span class="Comment"># skip</span>
<span class="muControl">loop</span>
<span class="Delimiter">}</span>
]
<span class="muRecipe">def</span> to-text x:&:cell<span class="muRecipe"> -> </span>out:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
buf:&:buffer<span class="Special"> <- </span>new-buffer <span class="Constant">30</span>
buf<span class="Special"> <- </span>to-buffer x, buf
out<span class="Special"> <- </span>buffer-to-array buf
]
<span class="muRecipe">def</span> to-buffer x:&:cell, buf:&:buffer<span class="muRecipe"> -> </span>buf:&:buffer [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Comment"># base case: empty cell</span>
<span class="Delimiter">{</span>
<span class="muControl">break-if</span> x
buf<span class="Special"> <- </span>append buf, <span class="Constant">[<>]</span>
<span class="muControl">reply</span>
<span class="Delimiter">}</span>
<span class="Comment"># base case: atom</span>
<span class="Delimiter">{</span>
s:text, atom?:boolean<span class="Special"> <- </span>maybe-convert *x, <span class="Constant">atom:variant</span>
<span class="muControl">break-unless</span> atom?
buf<span class="Special"> <- </span>append buf, s
<span class="muControl">reply</span>
<span class="Delimiter">}</span>
<span class="Comment"># recursive case: pair</span>
buf<span class="Special"> <- </span>append buf, <span class="Constant">[< ]</span>
first:&:cell<span class="Special"> <- </span>first x
buf<span class="Special"> <- </span>to-buffer first, buf
buf<span class="Special"> <- </span>append buf, <span class="Constant">[ | ]</span>
rest:&:cell<span class="Special"> <- </span>rest x
buf<span class="Special"> <- </span>to-buffer rest, buf
buf<span class="Special"> <- </span>append buf, <span class="Constant">[ >]</span>
]
<span class="muScenario">scenario</span> parse-single-letter-atom [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[a]</span>
x:&:cell<span class="Special"> <- </span>parse s
s2:text, <span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x, <span class="Constant">atom:variant</span>
<span class="Constant">11</span>:@:char/<span class="Special">raw <- </span>copy *s2
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is an atom</span>
<span class="Constant">11</span>:@:char<span class="Special"> <- </span><span class="Constant">[a]</span>
]
]
<span class="muScenario">scenario</span> parse-atom [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[abc]</span>
x:&:cell<span class="Special"> <- </span>parse s
s2:text, <span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x, <span class="Constant">atom:variant</span>
<span class="Constant">11</span>:@:char/<span class="Special">raw <- </span>copy *s2
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is an atom</span>
<span class="Constant">11</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span>
]
]
<span class="muScenario">scenario</span> parse-list-of-two-atoms [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[(abc def)]</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < abc | < def | <span class="Constant"><></span> > >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
x2:&:cell<span class="Special"> <- </span>rest x
s1:text, <span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x1, <span class="Constant">atom:variant</span>
<span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>is-pair? x2
x3:&:cell<span class="Special"> <- </span>first x2
s2:text, <span class="Constant">13</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x3, <span class="Constant">atom:variant</span>
<span class="Constant">14</span>:&:cell/<span class="Special">raw <- </span>rest x2
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
<span class="Constant">30</span>:@:char/<span class="Special">raw <- </span>copy *s2
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is an atom</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest is a pair</span>
<span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.first is an atom</span>
<span class="Constant">14</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.rest.rest is nil</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first</span>
<span class="Constant">30</span>:@:char<span class="Special"> <- </span><span class="Constant">[def]</span> <span class="Comment"># result.rest.first</span>
]
]
<span class="muScenario">scenario</span> parse-list-with-extra-spaces [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[ ( abc def ) ]</span> <span class="Comment"># extra spaces</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < abc | < def | <span class="Constant"><></span> > >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
x2:&:cell<span class="Special"> <- </span>rest x
s1:text, <span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x1, <span class="Constant">atom:variant</span>
<span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>is-pair? x2
x3:&:cell<span class="Special"> <- </span>first x2
s2:text, <span class="Constant">13</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x3, <span class="Constant">atom:variant</span>
<span class="Constant">14</span>:&:cell/<span class="Special">raw <- </span>rest x2
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
<span class="Constant">30</span>:@:char/<span class="Special">raw <- </span>copy *s2
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is an atom</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest is a pair</span>
<span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.first is an atom</span>
<span class="Constant">14</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.rest.rest is nil</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first</span>
<span class="Constant">30</span>:@:char<span class="Special"> <- </span><span class="Constant">[def]</span> <span class="Comment"># result.rest.first</span>
]
]
<span class="muScenario">scenario</span> parse-list-of-more-than-two-atoms [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[(abc def ghi)]</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < abc | < def | < ghi | <span class="Constant"><></span> > > >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
x2:&:cell<span class="Special"> <- </span>rest x
s1:text, <span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x1, <span class="Constant">atom:variant</span>
<span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>is-pair? x2
x3:&:cell<span class="Special"> <- </span>first x2
s2:text, <span class="Constant">13</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x3, <span class="Constant">atom:variant</span>
x4:&:cell<span class="Special"> <- </span>rest x2
<span class="Constant">14</span>:boolean/<span class="Special">raw <- </span>is-pair? x4
x5:&:cell<span class="Special"> <- </span>first x4
s3:text, <span class="Constant">15</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x5, <span class="Constant">atom:variant</span>
<span class="Constant">16</span>:&:cell/<span class="Special">raw <- </span>rest x4
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
<span class="Constant">30</span>:@:char/<span class="Special">raw <- </span>copy *s2
<span class="Constant">40</span>:@:char/<span class="Special">raw <- </span>copy *s3
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is an atom</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest is a pair</span>
<span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.first is an atom</span>
<span class="Constant">14</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.rest is a pair</span>
<span class="Constant">15</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.rest.first is an atom</span>
<span class="Constant">16</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.rest.rest.rest is nil</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first</span>
<span class="Constant">30</span>:@:char<span class="Special"> <- </span><span class="Constant">[def]</span> <span class="Comment"># result.rest.first</span>
<span class="Constant">40</span>:@:char<span class="Special"> <- </span><span class="Constant">[ghi]</span> <span class="Comment"># result.rest.rest</span>
]
]
<span class="muScenario">scenario</span> parse-nested-list [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[((abc))]</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < < abc | <span class="Constant"><></span> > | <span class="Constant"><></span> >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
<span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x2:&:cell<span class="Special"> <- </span>first x1
s1:text, <span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x2, <span class="Constant">atom:variant</span>
<span class="Constant">13</span>:&:cell/<span class="Special">raw <- </span>rest x1
<span class="Constant">14</span>:&:cell/<span class="Special">raw <- </span>rest x
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is a pair</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first.first is an atom</span>
<span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.first.rest is nil</span>
<span class="Constant">14</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.rest is nil</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first.first</span>
]
]
<span class="muScenario">scenario</span> parse-nested-list-2 [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[((abc) def)]</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < < abc | <span class="Constant"><></span> > | < def | <span class="Constant"><></span> > >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
<span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x2:&:cell<span class="Special"> <- </span>first x1
s1:text, <span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x2, <span class="Constant">atom:variant</span>
<span class="Constant">13</span>:&:cell/<span class="Special">raw <- </span>rest x1
x3:&:cell<span class="Special"> <- </span>rest x
x4:&:cell<span class="Special"> <- </span>first x3
s2:text, <span class="Constant">14</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x4, <span class="Constant">atom:variant</span>
<span class="Constant">15</span>:&:cell/<span class="Special">raw <- </span>rest x3
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
<span class="Constant">30</span>:@:char/<span class="Special">raw <- </span>copy *s2
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is a pair</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first.first is an atom</span>
<span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.first.rest is nil</span>
<span class="Constant">14</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.first is an atom</span>
<span class="Constant">15</span><span class="Special"> <- </span><span class="Constant">0</span> <span class="Comment"># result.rest.rest is nil</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first.first</span>
<span class="Constant">30</span>:@:char<span class="Special"> <- </span><span class="Constant">[def]</span> <span class="Comment"># result.rest.first</span>
]
]
<span class="Comment"># todo: uncomment these tests after we figure out how to continue tests after</span>
<span class="Comment"># assertion failures</span>
<span class="CommentedCode">#? scenario parse-error [</span>
<span class="CommentedCode">#? local-scope</span>
<span class="CommentedCode">#? s:text <- new [(]</span>
<span class="CommentedCode">#? #? hide-errors</span>
<span class="CommentedCode">#? x:&:cell <- parse s</span>
<span class="CommentedCode">#? #? show-errors</span>
<span class="CommentedCode">#? trace-should-contain [</span>
<span class="CommentedCode">#? error: unbalanced '(' in expression</span>
<span class="CommentedCode">#? ]</span>
<span class="CommentedCode">#? ]</span>
<span class="CommentedCode">#? </span>
<span class="CommentedCode">#? scenario parse-error-after-element [</span>
<span class="CommentedCode">#? local-scope</span>
<span class="CommentedCode">#? s:text <- new [(abc]</span>
<span class="CommentedCode">#? #? hide-errors</span>
<span class="CommentedCode">#? x:&:cell <- parse s</span>
<span class="CommentedCode">#? #? show-errors</span>
<span class="CommentedCode">#? trace-should-contain [</span>
<span class="CommentedCode">#? error: unbalanced '(' in expression</span>
<span class="CommentedCode">#? ]</span>
<span class="CommentedCode">#? ]</span>
<span class="muScenario">scenario</span> parse-dotted-list-of-two-atoms [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[(abc . def)]</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < abc | def >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
x2:&:cell<span class="Special"> <- </span>rest x
s1:text, <span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x1, <span class="Constant">atom:variant</span>
s2:text, <span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x2, <span class="Constant">atom:variant</span>
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
<span class="Constant">30</span>:@:char/<span class="Special">raw <- </span>copy *s2
memory-should-contain [
<span class="Comment"># parses to < abc | def ></span>
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is an atom</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest is an atom</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first</span>
<span class="Constant">30</span>:@:char<span class="Special"> <- </span><span class="Constant">[def]</span> <span class="Comment"># result.rest</span>
]
]
<span class="muScenario">scenario</span> parse-dotted-list-of-more-than-two-atoms [
<span class="Constant">local-scope</span>
s:text<span class="Special"> <- </span>new <span class="Constant">[(abc def . ghi)]</span>
x:&:cell<span class="Special"> <- </span>parse s
trace-should-contain [
app/parse: < abc | < def | ghi > >
]
<span class="Constant">10</span>:boolean/<span class="Special">raw <- </span>is-pair? x
x1:&:cell<span class="Special"> <- </span>first x
x2:&:cell<span class="Special"> <- </span>rest x
s1:text, <span class="Constant">11</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x1, <span class="Constant">atom:variant</span>
<span class="Constant">12</span>:boolean/<span class="Special">raw <- </span>is-pair? x2
x3:&:cell<span class="Special"> <- </span>first x2
s2:text, <span class="Constant">13</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x3, <span class="Constant">atom:variant</span>
x4:&:cell<span class="Special"> <- </span>rest x2
s3:text, <span class="Constant">14</span>:boolean/<span class="Special">raw <- </span>maybe-convert *x4, <span class="Constant">atom:variant</span>
<span class="Constant">20</span>:@:char/<span class="Special">raw <- </span>copy *s1
<span class="Constant">30</span>:@:char/<span class="Special">raw <- </span>copy *s2
<span class="Constant">40</span>:@:char/<span class="Special">raw <- </span>copy *s3
memory-should-contain [
<span class="Constant">10</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># parse result is a pair</span>
<span class="Constant">11</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.first is an atom</span>
<span class="Constant">12</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest is a pair</span>
<span class="Constant">13</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.first is an atom</span>
<span class="Constant">14</span><span class="Special"> <- </span><span class="Constant">1</span> <span class="Comment"># result.rest.rest is an atom</span>
<span class="Constant">20</span>:@:char<span class="Special"> <- </span><span class="Constant">[abc]</span> <span class="Comment"># result.first</span>
<span class="Constant">30</span>:@:char<span class="Special"> <- </span><span class="Constant">[def]</span> <span class="Comment"># result.rest.first</span>
<span class="Constant">40</span>:@:char<span class="Special"> <- </span><span class="Constant">[ghi]</span> <span class="Comment"># result.rest.rest</span>
]
]
<span class="SalientComment">## convert tree of cells to mu text</span>
<span class="muRecipe">def</span> to-mu in:&:cell<span class="muRecipe"> -> </span>out:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
buf:&:buffer<span class="Special"> <- </span>new-buffer <span class="Constant">30</span>
buf<span class="Special"> <- </span>to-mu in, buf
out<span class="Special"> <- </span>buffer-to-array buf
]
<span class="muRecipe">def</span> to-mu in:&:cell, buf:&:buffer<span class="muRecipe"> -> </span>buf:&:buffer, result-name:text [
<span class="Constant">local-scope</span>
<span class="Constant">load-ingredients</span>
<span class="Comment"># null cell? no change.</span>
<span class="Comment"># pair with all atoms? gensym a new variable</span>
<span class="Comment"># pair containing other pairs? recurse</span>
result-name<span class="Special"> <- </span>copy <span class="Constant">0</span>
]
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|