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
|
<!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 - chessboard.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="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #aaaaaa; background-color: #080808; }
body { font-size: 12pt; font-family: monospace; color: #aaaaaa; background-color: #080808; }
a { color:#eeeeee; text-decoration: none; }
a:hover { text-decoration: underline; }
* { font-size: 12pt; font-size: 1em; }
.muData { color: #ffff00; }
.muRecipe { color: #ff8700; }
.Special { color: #c00000; }
.Delimiter { color: #800080; }
.SalientComment { color: #00ffff; }
.Comment { color: #9090ff; }
.Comment a { color:#0000ee; text-decoration:underline; }
.Constant { color: #00a0a0; }
.LineNr { color: #444444; }
.muControl { color: #c0a020; }
.CommentedCode { color: #6c6c6c; }
.muScenario { color: #00af00; }
-->
</style>
<script type='text/javascript'>
<!--
/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
var lineNum;
lineNum = window.location.hash;
lineNum = lineNum.substr(1); /* strip off '#' */
if (lineNum.indexOf('L') == -1) {
lineNum = 'L'+lineNum;
}
lineElem = document.getElementById(lineNum);
/* Always jump to new location even if the line was hidden inside a fold, or
* we corrected the raw number to a line ID.
*/
if (lineElem) {
lineElem.scrollIntoView(true);
}
return true;
}
if ('onhashchange' in window) {
window.onhashchange = JumpToLine;
}
-->
</script>
</head>
<body onload='JumpToLine();'>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment"># Chessboard program: you type in moves in algebraic notation, and it'll</span>
<span id="L2" class="LineNr"> 2 </span><span class="Comment"># display the position after each move.</span>
<span id="L3" class="LineNr"> 3 </span>
<span id="L4" class="LineNr"> 4 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L4'>main</a> [
<span id="L5" class="LineNr"> 5 </span> <span class="Constant">local-scope</span>
<span id="L6" class="LineNr"> 6 </span> open-console <span class="Comment"># take control of screen, keyboard and mouse</span>
<span id="L7" class="LineNr"> 7 </span> <a href='081print.mu.html#L46'>clear-screen</a><span class="Constant"> null/screen</span> <span class="Comment"># non-scrolling app</span>
<span id="L8" class="LineNr"> 8 </span>
<span id="L9" class="LineNr"> 9 </span> <span class="Comment"># The chessboard function takes keyboard and screen objects as inputs.</span>
<span id="L10" class="LineNr"> 10 </span> <span class="Comment">#</span>
<span id="L11" class="LineNr"> 11 </span> <span class="Comment"># In Mu it is good form (though not required) to explicitly state what</span>
<span id="L12" class="LineNr"> 12 </span> <span class="Comment"># hardware a function needs.</span>
<span id="L13" class="LineNr"> 13 </span> <span class="Comment">#</span>
<span id="L14" class="LineNr"> 14 </span> <span class="Comment"># Here the console and screen are both null, which usually indicates real</span>
<span id="L15" class="LineNr"> 15 </span> <span class="Comment"># hardware rather than a fake for testing as you'll see below.</span>
<span id="L16" class="LineNr"> 16 </span> <a href='chessboard.mu.html#L69'>chessboard</a><span class="Constant"> null/screen, null/console</span>
<span id="L17" class="LineNr"> 17 </span>
<span id="L18" class="LineNr"> 18 </span> close-console <span class="Comment"># clean up screen, keyboard and mouse</span>
<span id="L19" class="LineNr"> 19 </span>]
<span id="L20" class="LineNr"> 20 </span>
<span id="L21" class="LineNr"> 21 </span><span class="SalientComment">## But enough about Mu. Here's what it looks like to run the chessboard program.</span>
<span id="L22" class="LineNr"> 22 </span>
<span id="L23" class="LineNr"> 23 </span><span class="muScenario">scenario</span> print-board-and-read-move [
<span id="L24" class="LineNr"> 24 </span> <span class="Constant">local-scope</span>
<span id="L25" class="LineNr"> 25 </span> trace-until <span class="Constant">100/app</span>
<span id="L26" class="LineNr"> 26 </span> <span class="Comment"># we'll make the screen really wide because the program currently prints out a long line</span>
<span id="L27" class="LineNr"> 27 </span> assume-screen <span class="Constant">120/width</span>, <span class="Constant">20/height</span>
<span id="L28" class="LineNr"> 28 </span> <span class="Comment"># initialize keyboard to type in a move</span>
<span id="L29" class="LineNr"> 29 </span> assume-console [
<span id="L30" class="LineNr"> 30 </span> type <span class="Constant">[a2-a4</span>
<span id="L31" class="LineNr"> 31 </span><span class="Constant">]</span>
<span id="L32" class="LineNr"> 32 </span> ]
<span id="L33" class="LineNr"> 33 </span> run [
<span id="L34" class="LineNr"> 34 </span> <a href='081print.mu.html#L16'>screen</a>, <a href='084console.mu.html#L23'>console</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L69'>chessboard</a> <a href='081print.mu.html#L16'>screen</a>, <a href='084console.mu.html#L23'>console</a>
<span id="L35" class="LineNr"> 35 </span> <span class="Comment"># icon for the cursor</span>
<span id="L36" class="LineNr"> 36 </span> cursor-icon:char <span class="Special"><-</span> copy <span class="Constant">9251/␣</span>
<span id="L37" class="LineNr"> 37 </span> <a href='081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='081print.mu.html#L16'>screen</a>, cursor-icon
<span id="L38" class="LineNr"> 38 </span> ]
<span id="L39" class="LineNr"> 39 </span> screen-should-contain [
<span id="L40" class="LineNr"> 40 </span> <span class="Comment"># 1 2 3 4 5 6 7 8 9 10 11</span>
<span id="L41" class="LineNr"> 41 </span> <span class="Comment"># 012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789</span>
<span id="L42" class="LineNr"> 42 </span> <span class="Constant"> .Stupid text-mode chessboard. White pieces in uppercase; black pieces in lowercase. No checking for legal moves. .</span>
<span id="L43" class="LineNr"> 43 </span> <span class="Constant"> . .</span>
<span id="L44" class="LineNr"> 44 </span> <span class="Constant"> .8 | r n b q k b n r .</span>
<span id="L45" class="LineNr"> 45 </span> <span class="Constant"> .7 | p p p p p p p p .</span>
<span id="L46" class="LineNr"> 46 </span> <span class="Constant"> .6 | .</span>
<span id="L47" class="LineNr"> 47 </span> <span class="Constant"> .5 | .</span>
<span id="L48" class="LineNr"> 48 </span> <span class="Constant"> .4 | P .</span>
<span id="L49" class="LineNr"> 49 </span> <span class="Constant"> .3 | .</span>
<span id="L50" class="LineNr"> 50 </span> <span class="Constant"> .2 | P P P P P P P .</span>
<span id="L51" class="LineNr"> 51 </span> <span class="Constant"> .1 | R N B Q K B N R .</span>
<span id="L52" class="LineNr"> 52 </span> <span class="Constant"> . +---------------- .</span>
<span id="L53" class="LineNr"> 53 </span> <span class="Constant"> . a b c d e f g h .</span>
<span id="L54" class="LineNr"> 54 </span> <span class="Constant"> . .</span>
<span id="L55" class="LineNr"> 55 </span> <span class="Constant"> .Type in your <a href='chessboard.mu.html#L239'>move</a> as <from square>-<to square>. For example: 'a2-a4'. Then press <enter>. .</span>
<span id="L56" class="LineNr"> 56 </span> <span class="Constant"> . .</span>
<span id="L57" class="LineNr"> 57 </span> <span class="Constant"> .Hit 'q' to exit. .</span>
<span id="L58" class="LineNr"> 58 </span> <span class="Constant"> . .</span>
<span id="L59" class="LineNr"> 59 </span> <span class="Constant"> .move: ␣ .</span>
<span id="L60" class="LineNr"> 60 </span> <span class="Constant"> . .</span>
<span id="L61" class="LineNr"> 61 </span> <span class="Constant"> . .</span>
<span id="L62" class="LineNr"> 62 </span> ]
<span id="L63" class="LineNr"> 63 </span>]
<span id="L64" class="LineNr"> 64 </span>
<span id="L65" class="LineNr"> 65 </span><span class="SalientComment">## Here's how 'chessboard' is implemented.</span>
<span id="L66" class="LineNr"> 66 </span>
<span id="L67" class="LineNr"> 67 </span><span class="muData">type</span> <a href='chessboard.mu.html#L67'>board</a> = &:@:&:@:char <span class="Comment"># a 2-D array of arrays of characters</span>
<span id="L68" class="LineNr"> 68 </span>
<span id="L69" class="LineNr"> 69 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L69'>chessboard</a> <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a>, <a href='084console.mu.html#L23'>console</a>:&:<a href='084console.mu.html#L23'>console</a><span class="muRecipe"> -> </span><a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a>, <a href='084console.mu.html#L23'>console</a>:&:<a href='084console.mu.html#L23'>console</a> [
<span id="L70" class="LineNr"> 70 </span> <span class="Constant">local-scope</span>
<span id="L71" class="LineNr"> 71 </span> <span class="Constant">load-inputs</span>
<span id="L72" class="LineNr"> 72 </span> <a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L190'>initial-position</a>
<span id="L73" class="LineNr"> 73 </span> <span class="Comment"># hook up stdin</span>
<span id="L74" class="LineNr"> 74 </span> stdin-in:&:<a href='075channel.mu.html#L36'>source</a>:char, stdin-out:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">10/capacity</span>
<span id="L75" class="LineNr"> 75 </span> <span class="muControl">start-running</span> <a href='084console.mu.html#L73'>send-keys-to-channel</a>, <a href='084console.mu.html#L23'>console</a>, stdin-out, <a href='081print.mu.html#L16'>screen</a>
<span id="L76" class="LineNr"> 76 </span> <span class="Comment"># buffer lines in stdin</span>
<span id="L77" class="LineNr"> 77 </span> buffered-stdin-in:&:<a href='075channel.mu.html#L36'>source</a>:char, buffered-stdin-out:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">10/capacity</span>
<span id="L78" class="LineNr"> 78 </span> <span class="muControl">start-running</span> <a href='075channel.mu.html#L400'>buffer-lines</a>, stdin-in, buffered-stdin-out
<span id="L79" class="LineNr"> 79 </span> <span class="Delimiter">{</span>
<span id="L80" class="LineNr"> 80 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[Stupid text-mode chessboard. White pieces in uppercase; black pieces in lowercase. No checking for legal moves.</span>
<span id="L81" class="LineNr"> 81 </span><span class="Constant">]</span>
<span id="L82" class="LineNr"> 82 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L83" class="LineNr"> 83 </span> print <a href='081print.mu.html#L16'>screen</a>, <a href='chessboard.mu.html#L67'>board</a>
<span id="L84" class="LineNr"> 84 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L85" class="LineNr"> 85 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[Type in your <a href='chessboard.mu.html#L239'>move</a> as <from square>-<to square>. For example: 'a2-a4'. Then press <enter>.</span>
<span id="L86" class="LineNr"> 86 </span><span class="Constant">]</span>
<span id="L87" class="LineNr"> 87 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L88" class="LineNr"> 88 </span> print <a href='081print.mu.html#L16'>screen</a> <span class="Constant">[Hit 'q' to exit.</span>
<span id="L89" class="LineNr"> 89 </span><span class="Constant">]</span>
<span id="L90" class="LineNr"> 90 </span> <span class="Delimiter">{</span>
<span id="L91" class="LineNr"> 91 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L92" class="LineNr"> 92 </span> <a href='081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[move: ]</span>
<span id="L93" class="LineNr"> 93 </span> m:&:<a href='chessboard.mu.html#L239'>move</a>, quit:bool, error:bool <span class="Special"><-</span> <a href='chessboard.mu.html#L248'>read-move</a> buffered-stdin-in, <a href='081print.mu.html#L16'>screen</a>
<span id="L94" class="LineNr"> 94 </span> <span class="muControl">break-if</span> quit, <span class="Constant">+quit</span>
<span id="L95" class="LineNr"> 95 </span> buffered-stdin-in <span class="Special"><-</span> <a href='075channel.mu.html#L304'>clear</a> buffered-stdin-in <span class="Comment"># cleanup after error. todo: test this?</span>
<span id="L96" class="LineNr"> 96 </span> <span class="muControl">loop-if</span> error
<span id="L97" class="LineNr"> 97 </span> <span class="Delimiter">}</span>
<span id="L98" class="LineNr"> 98 </span> <a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L534'>make-move</a> <a href='chessboard.mu.html#L67'>board</a>, m
<span id="L99" class="LineNr"> 99 </span> <a href='081print.mu.html#L16'>screen</a> <span class="Special"><-</span> <a href='081print.mu.html#L46'>clear-screen</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L100" class="LineNr">100 </span> <span class="muControl"> loop</span>
<span id="L101" class="LineNr">101 </span> <span class="Delimiter">}</span>
<span id="L102" class="LineNr">102 </span><span class="Constant"> +quit</span>
<span id="L103" class="LineNr">103 </span>]
<span id="L104" class="LineNr">104 </span>
<span id="L105" class="LineNr">105 </span><span class="SalientComment">## a board is an array of files, a file is an array of characters (squares)</span>
<span id="L106" class="LineNr">106 </span>
<span id="L107" class="LineNr">107 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L107'>new-board</a> <a href='chessboard.mu.html#L190'>initial-position</a>:&:@:char<span class="muRecipe"> -> </span><a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a> [
<span id="L108" class="LineNr">108 </span> <span class="Constant">local-scope</span>
<span id="L109" class="LineNr">109 </span> <span class="Constant">load-inputs</span>
<span id="L110" class="LineNr">110 </span> <span class="Comment"># assert(length(initial-position) == 64)</span>
<span id="L111" class="LineNr">111 </span> len:num <span class="Special"><-</span> length *initial-position
<span id="L112" class="LineNr">112 </span> correct-length?:bool <span class="Special"><-</span> equal len,<span class="Constant"> 64</span>
<span id="L113" class="LineNr">113 </span> assert correct-length?, <span class="Constant">[chessboard had incorrect size]</span>
<span id="L114" class="LineNr">114 </span> <span class="Comment"># board is an array of pointers to files; file is an array of characters</span>
<span id="L115" class="LineNr">115 </span> <a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> new <span class="Delimiter">{</span>(address array character): type<span class="Delimiter">}</span>,<span class="Constant"> 8</span>
<span id="L116" class="LineNr">116 </span> col:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span id="L117" class="LineNr">117 </span> <span class="Delimiter">{</span>
<span id="L118" class="LineNr">118 </span> done?:bool <span class="Special"><-</span> equal col,<span class="Constant"> 8</span>
<span id="L119" class="LineNr">119 </span> <span class="muControl">break-if</span> done?
<span id="L120" class="LineNr">120 </span> file:&:@:char <span class="Special"><-</span> <a href='chessboard.mu.html#L127'>new-file</a> <a href='chessboard.mu.html#L190'>initial-position</a>, col
<span id="L121" class="LineNr">121 </span> *board <span class="Special"><-</span> put-index *board, col, file
<span id="L122" class="LineNr">122 </span> col <span class="Special"><-</span> add col,<span class="Constant"> 1</span>
<span id="L123" class="LineNr">123 </span> <span class="muControl"> loop</span>
<span id="L124" class="LineNr">124 </span> <span class="Delimiter">}</span>
<span id="L125" class="LineNr">125 </span>]
<span id="L126" class="LineNr">126 </span>
<span id="L127" class="LineNr">127 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L127'>new-file</a> position:&:@:char, index:num<span class="muRecipe"> -> </span>result:&:@:char [
<span id="L128" class="LineNr">128 </span> <span class="Constant">local-scope</span>
<span id="L129" class="LineNr">129 </span> <span class="Constant">load-inputs</span>
<span id="L130" class="LineNr">130 </span> index <span class="Special"><-</span> multiply index,<span class="Constant"> 8</span>
<span id="L131" class="LineNr">131 </span> result <span class="Special"><-</span> new <span class="Constant">character:type</span>,<span class="Constant"> 8</span>
<span id="L132" class="LineNr">132 </span> row:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span id="L133" class="LineNr">133 </span> <span class="Delimiter">{</span>
<span id="L134" class="LineNr">134 </span> done?:bool <span class="Special"><-</span> equal row,<span class="Constant"> 8</span>
<span id="L135" class="LineNr">135 </span> <span class="muControl">break-if</span> done?
<span id="L136" class="LineNr">136 </span> square:char <span class="Special"><-</span> index *position, index
<span id="L137" class="LineNr">137 </span> *result <span class="Special"><-</span> put-index *result, row, square
<span id="L138" class="LineNr">138 </span> row <span class="Special"><-</span> add row,<span class="Constant"> 1</span>
<span id="L139" class="LineNr">139 </span> index <span class="Special"><-</span> add index,<span class="Constant"> 1</span>
<span id="L140" class="LineNr">140 </span> <span class="muControl"> loop</span>
<span id="L141" class="LineNr">141 </span> <span class="Delimiter">}</span>
<span id="L142" class="LineNr">142 </span>]
<span id="L143" class="LineNr">143 </span>
<span id="L144" class="LineNr">144 </span><span class="muRecipe">def</span> print <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a>, <a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a><span class="muRecipe"> -> </span><a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a> [
<span id="L145" class="LineNr">145 </span> <span class="Constant">local-scope</span>
<span id="L146" class="LineNr">146 </span> <span class="Constant">load-inputs</span>
<span id="L147" class="LineNr">147 </span> row:num <span class="Special"><-</span> copy<span class="Constant"> 7</span> <span class="Comment"># start printing from the top of the board</span>
<span id="L148" class="LineNr">148 </span> space:char <span class="Special"><-</span> copy <span class="Constant">32/space</span>
<span id="L149" class="LineNr">149 </span> <span class="Comment"># print each row</span>
<span id="L150" class="LineNr">150 </span> <span class="Delimiter">{</span>
<span id="L151" class="LineNr">151 </span> done?:bool <span class="Special"><-</span> lesser-than row,<span class="Constant"> 0</span>
<span id="L152" class="LineNr">152 </span> <span class="muControl">break-if</span> done?
<span id="L153" class="LineNr">153 </span> <span class="Comment"># print rank number as a legend</span>
<span id="L154" class="LineNr">154 </span> rank:num <span class="Special"><-</span> add row,<span class="Constant"> 1</span>
<span id="L155" class="LineNr">155 </span> print <a href='081print.mu.html#L16'>screen</a>, rank
<span id="L156" class="LineNr">156 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[ | ]</span>
<span id="L157" class="LineNr">157 </span> <span class="Comment"># print each square in the row</span>
<span id="L158" class="LineNr">158 </span> col:num <span class="Special"><-</span> copy<span class="Constant"> 0</span>
<span id="L159" class="LineNr">159 </span> <span class="Delimiter">{</span>
<span id="L160" class="LineNr">160 </span> done?:bool <span class="Special"><-</span> equal col:num,<span class="Constant"> 8</span>
<span id="L161" class="LineNr">161 </span> <span class="muControl">break-if</span> done?
<span id="L162" class="LineNr">162 </span> f:&:@:char <span class="Special"><-</span> index *board, col
<span id="L163" class="LineNr">163 </span> c:char <span class="Special"><-</span> index *f, row
<span id="L164" class="LineNr">164 </span> bg:num <span class="Special"><-</span> <a href='chessboard.mu.html#L181'>square-color</a> row, col
<span id="L165" class="LineNr">165 </span> print <a href='081print.mu.html#L16'>screen</a>, c, <span class="Constant">7/white</span>, bg
<span id="L166" class="LineNr">166 </span> print <a href='081print.mu.html#L16'>screen</a>, space
<span id="L167" class="LineNr">167 </span> col <span class="Special"><-</span> add col,<span class="Constant"> 1</span>
<span id="L168" class="LineNr">168 </span> <span class="muControl"> loop</span>
<span id="L169" class="LineNr">169 </span> <span class="Delimiter">}</span>
<span id="L170" class="LineNr">170 </span> row <span class="Special"><-</span> subtract row,<span class="Constant"> 1</span>
<span id="L171" class="LineNr">171 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L172" class="LineNr">172 </span> <span class="muControl"> loop</span>
<span id="L173" class="LineNr">173 </span> <span class="Delimiter">}</span>
<span id="L174" class="LineNr">174 </span> <span class="Comment"># print file letters as legend</span>
<span id="L175" class="LineNr">175 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[ +----------------]</span>
<span id="L176" class="LineNr">176 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L177" class="LineNr">177 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[ a b c d e f g h]</span>
<span id="L178" class="LineNr">178 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L179" class="LineNr">179 </span>]
<span id="L180" class="LineNr">180 </span>
<span id="L181" class="LineNr">181 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L181'>square-color</a> row:num, col:num<span class="muRecipe"> -> </span>result:num [
<span id="L182" class="LineNr">182 </span> <span class="Constant">local-scope</span>
<span id="L183" class="LineNr">183 </span> <span class="Constant">load-inputs</span>
<span id="L184" class="LineNr">184 </span> result <span class="Special"><-</span> copy <span class="Constant">0/black</span>
<span id="L185" class="LineNr">185 </span> x:num <span class="Special"><-</span> add row, col
<span id="L186" class="LineNr">186 </span> _, rem:num <span class="Special"><-</span> divide-with-remainder x,<span class="Constant"> 2</span>
<span id="L187" class="LineNr">187 </span> <span class="muControl">return-if</span> rem,<span class="Constant"> 238</span>
<span id="L188" class="LineNr">188 </span>]
<span id="L189" class="LineNr">189 </span>
<span id="L190" class="LineNr">190 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L190'>initial-position</a><span class="muRecipe"> -> </span><a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a> [
<span id="L191" class="LineNr">191 </span> <span class="Constant">local-scope</span>
<span id="L192" class="LineNr">192 </span> <span class="Comment"># layout in memory (in raster order):</span>
<span id="L193" class="LineNr">193 </span> <span class="Comment"># R P _ _ _ _ p r</span>
<span id="L194" class="LineNr">194 </span> <span class="Comment"># N P _ _ _ _ p n</span>
<span id="L195" class="LineNr">195 </span> <span class="Comment"># B P _ _ _ _ p b</span>
<span id="L196" class="LineNr">196 </span> <span class="Comment"># Q P _ _ _ _ p q</span>
<span id="L197" class="LineNr">197 </span> <span class="Comment"># K P _ _ _ _ p k</span>
<span id="L198" class="LineNr">198 </span> <span class="Comment"># B P _ _ _ _ p B</span>
<span id="L199" class="LineNr">199 </span> <span class="Comment"># N P _ _ _ _ p n</span>
<span id="L200" class="LineNr">200 </span> <span class="Comment"># R P _ _ _ _ p r</span>
<span id="L201" class="LineNr">201 </span> <a href='chessboard.mu.html#L190'>initial-position</a>:&:@:char <span class="Special"><-</span> <a href='063array.mu.html#L16'>new-array</a> <span class="Constant">82/R</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">114/r</span>, <span class="Constant">78/N</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">110/n</span>, <span class="Constant">66/B</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">98/b</span>, <span class="Constant">81/Q</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">113/q</span>, <span class="Constant">75/K</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">107/k</span>, <span class="Constant">66/B</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">98/b</span>, <span class="Constant">78/N</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">110/n</span>, <span class="Constant">82/R</span>, <span class="Constant">80/P</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">32/blank</span>, <span class="Constant">112/p</span>, <span class="Constant">114/r</span>
<span id="L202" class="LineNr">202 </span><span class="CommentedCode">#? 82/R, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 114/r,</span>
<span id="L203" class="LineNr">203 </span><span class="CommentedCode">#? 78/N, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 110/n,</span>
<span id="L204" class="LineNr">204 </span><span class="CommentedCode">#? 66/B, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 98/b, </span>
<span id="L205" class="LineNr">205 </span><span class="CommentedCode">#? 81/Q, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 113/q,</span>
<span id="L206" class="LineNr">206 </span><span class="CommentedCode">#? 75/K, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 107/k,</span>
<span id="L207" class="LineNr">207 </span><span class="CommentedCode">#? 66/B, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 98/b,</span>
<span id="L208" class="LineNr">208 </span><span class="CommentedCode">#? 78/N, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 110/n,</span>
<span id="L209" class="LineNr">209 </span><span class="CommentedCode">#? 82/R, 80/P, 32/blank, 32/blank, 32/blank, 32/blank, 112/p, 114/r</span>
<span id="L210" class="LineNr">210 </span> <a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L107'>new-board</a> <a href='chessboard.mu.html#L190'>initial-position</a>
<span id="L211" class="LineNr">211 </span>]
<span id="L212" class="LineNr">212 </span>
<span id="L213" class="LineNr">213 </span><span class="muScenario">scenario</span> printing-the-board [
<span id="L214" class="LineNr">214 </span> <span class="Constant">local-scope</span>
<span id="L215" class="LineNr">215 </span> <a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L190'>initial-position</a>
<span id="L216" class="LineNr">216 </span> assume-screen <span class="Constant">30/width</span>, <span class="Constant">12/height</span>
<span id="L217" class="LineNr">217 </span> run [
<span id="L218" class="LineNr">218 </span> <a href='081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='081print.mu.html#L16'>screen</a>, <a href='chessboard.mu.html#L67'>board</a>
<span id="L219" class="LineNr">219 </span> ]
<span id="L220" class="LineNr">220 </span> screen-should-contain [
<span id="L221" class="LineNr">221 </span> <span class="Comment"># 012345678901234567890123456789</span>
<span id="L222" class="LineNr">222 </span> <span class="Constant"> .8 | r n b q k b n r .</span>
<span id="L223" class="LineNr">223 </span> <span class="Constant"> .7 | p p p p p p p p .</span>
<span id="L224" class="LineNr">224 </span> <span class="Constant"> .6 | .</span>
<span id="L225" class="LineNr">225 </span> <span class="Constant"> .5 | .</span>
<span id="L226" class="LineNr">226 </span> <span class="Constant"> .4 | .</span>
<span id="L227" class="LineNr">227 </span> <span class="Constant"> .3 | .</span>
<span id="L228" class="LineNr">228 </span> <span class="Constant"> .2 | P P P P P P P P .</span>
<span id="L229" class="LineNr">229 </span> <span class="Constant"> .1 | R N B Q K B N R .</span>
<span id="L230" class="LineNr">230 </span> <span class="Constant"> . +---------------- .</span>
<span id="L231" class="LineNr">231 </span> <span class="Constant"> . a b c d e f g h .</span>
<span id="L232" class="LineNr">232 </span> <span class="Constant"> . .</span>
<span id="L233" class="LineNr">233 </span> <span class="Constant"> . .</span>
<span id="L234" class="LineNr">234 </span> ]
<span id="L235" class="LineNr">235 </span>]
<span id="L236" class="LineNr">236 </span>
<span id="L237" class="LineNr">237 </span><span class="SalientComment">## data structure: move</span>
<span id="L238" class="LineNr">238 </span>
<span id="L239" class="LineNr">239 </span><span class="muData">container</span> <a href='chessboard.mu.html#L239'>move</a> [
<span id="L240" class="LineNr">240 </span> <span class="Comment"># valid range: 0-7</span>
<span id="L241" class="LineNr">241 </span> from-file:num
<span id="L242" class="LineNr">242 </span> from-rank:num
<span id="L243" class="LineNr">243 </span> to-file:num
<span id="L244" class="LineNr">244 </span> to-rank:num
<span id="L245" class="LineNr">245 </span>]
<span id="L246" class="LineNr">246 </span>
<span id="L247" class="LineNr">247 </span><span class="Comment"># prints only error messages to screen</span>
<span id="L248" class="LineNr">248 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L248'>read-move</a> stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a><span class="muRecipe"> -> </span>result:&:<a href='chessboard.mu.html#L239'>move</a>, quit?:bool, error?:bool, stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a> [
<span id="L249" class="LineNr">249 </span> <span class="Constant">local-scope</span>
<span id="L250" class="LineNr">250 </span> <span class="Constant">load-inputs</span>
<span id="L251" class="LineNr">251 </span> from-file:num, quit?:bool, error?:bool <span class="Special"><-</span> <a href='chessboard.mu.html#L276'>read-file</a> stdin, <a href='081print.mu.html#L16'>screen</a>
<span id="L252" class="LineNr">252 </span> <span class="muControl">return-if</span> quit?,<span class="Constant"> null/dummy</span>
<span id="L253" class="LineNr">253 </span> <span class="muControl">return-if</span> error?,<span class="Constant"> null/dummy</span>
<span id="L254" class="LineNr">254 </span> <span class="Comment"># construct the move object</span>
<span id="L255" class="LineNr">255 </span> result:&:<a href='chessboard.mu.html#L239'>move</a> <span class="Special"><-</span> new <span class="Constant"><a href='chessboard.mu.html#L239'>move</a>:type</span>
<span id="L256" class="LineNr">256 </span> *result <span class="Special"><-</span> put *result, <span class="Constant">from-file:offset</span>, from-file
<span id="L257" class="LineNr">257 </span> from-rank:num, quit?, error? <span class="Special"><-</span> <a href='chessboard.mu.html#L314'>read-rank</a> stdin, <a href='081print.mu.html#L16'>screen</a>
<span id="L258" class="LineNr">258 </span> <span class="muControl">return-if</span> quit?,<span class="Constant"> null/dummy</span>
<span id="L259" class="LineNr">259 </span> <span class="muControl">return-if</span> error?,<span class="Constant"> null/dummy</span>
<span id="L260" class="LineNr">260 </span> *result <span class="Special"><-</span> put *result, <span class="Constant">from-rank:offset</span>, from-rank
<span id="L261" class="LineNr">261 </span> error? <span class="Special"><-</span> <a href='chessboard.mu.html#L352'>expect-from-channel</a> stdin, <span class="Constant">45/dash</span>, <a href='081print.mu.html#L16'>screen</a>
<span id="L262" class="LineNr">262 </span> <span class="muControl">return-if</span> error?,<span class="Constant"> null/dummy, false/quit</span>
<span id="L263" class="LineNr">263 </span> to-file:num, quit?, error? <span class="Special"><-</span> <a href='chessboard.mu.html#L276'>read-file</a> stdin, <a href='081print.mu.html#L16'>screen</a>
<span id="L264" class="LineNr">264 </span> <span class="muControl">return-if</span> quit?,<span class="Constant"> null/dummy</span>
<span id="L265" class="LineNr">265 </span> <span class="muControl">return-if</span> error?,<span class="Constant"> null/dummy</span>
<span id="L266" class="LineNr">266 </span> *result <span class="Special"><-</span> put *result, <span class="Constant">to-file:offset</span>, to-file
<span id="L267" class="LineNr">267 </span> to-rank:num, quit?, error? <span class="Special"><-</span> <a href='chessboard.mu.html#L314'>read-rank</a> stdin, <a href='081print.mu.html#L16'>screen</a>
<span id="L268" class="LineNr">268 </span> <span class="muControl">return-if</span> quit?,<span class="Constant"> null/dummy</span>
<span id="L269" class="LineNr">269 </span> <span class="muControl">return-if</span> error?,<span class="Constant"> null/dummy</span>
<span id="L270" class="LineNr">270 </span> *result <span class="Special"><-</span> put *result, <span class="Constant">to-rank:offset</span>, to-rank
<span id="L271" class="LineNr">271 </span> error? <span class="Special"><-</span> <a href='chessboard.mu.html#L352'>expect-from-channel</a> stdin, <span class="Constant">10/newline</span>, <a href='081print.mu.html#L16'>screen</a>
<span id="L272" class="LineNr">272 </span> <span class="muControl">return-if</span> error?,<span class="Constant"> null/dummy, false/quit</span>
<span id="L273" class="LineNr">273 </span>]
<span id="L274" class="LineNr">274 </span>
<span id="L275" class="LineNr">275 </span><span class="Comment"># valid values for file: 0-7</span>
<span id="L276" class="LineNr">276 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L276'>read-file</a> stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a><span class="muRecipe"> -> </span>file:num, quit:bool, error:bool, stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a> [
<span id="L277" class="LineNr">277 </span> <span class="Constant">local-scope</span>
<span id="L278" class="LineNr">278 </span> <span class="Constant">load-inputs</span>
<span id="L279" class="LineNr">279 </span> c:char, eof?:bool, stdin <span class="Special"><-</span> read stdin
<span id="L280" class="LineNr">280 </span> <span class="muControl">return-if</span> eof?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L281" class="LineNr">281 </span> q-pressed?:bool <span class="Special"><-</span> equal c, <span class="Constant">81/Q</span>
<span id="L282" class="LineNr">282 </span> <span class="muControl">return-if</span> q-pressed?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L283" class="LineNr">283 </span> q-pressed? <span class="Special"><-</span> equal c, <span class="Constant">113/q</span>
<span id="L284" class="LineNr">284 </span> <span class="muControl">return-if</span> q-pressed?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L285" class="LineNr">285 </span> empty-fake-keyboard?:bool <span class="Special"><-</span> equal c, <span class="Constant">0/eof</span>
<span id="L286" class="LineNr">286 </span> <span class="muControl">return-if</span> empty-fake-keyboard?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L287" class="LineNr">287 </span> <span class="Delimiter">{</span>
<span id="L288" class="LineNr">288 </span> newline?:bool <span class="Special"><-</span> equal c, <span class="Constant">10/newline</span>
<span id="L289" class="LineNr">289 </span> <span class="muControl">break-unless</span> newline?
<span id="L290" class="LineNr">290 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[that's not enough]</span>
<span id="L291" class="LineNr">291 </span> <span class="muControl"> return</span> <span class="Constant">0/dummy</span>,<span class="Constant"> false/don't-quit, true/error</span>
<span id="L292" class="LineNr">292 </span> <span class="Delimiter">}</span>
<span id="L293" class="LineNr">293 </span> file:num <span class="Special"><-</span> subtract c, <span class="Constant">97/a</span>
<span id="L294" class="LineNr">294 </span> <span class="Comment"># 'a' <= file <= 'h'</span>
<span id="L295" class="LineNr">295 </span> <span class="Delimiter">{</span>
<span id="L296" class="LineNr">296 </span> above-min:bool <span class="Special"><-</span> greater-or-equal file,<span class="Constant"> 0</span>
<span id="L297" class="LineNr">297 </span> <span class="muControl">break-if</span> above-min
<span id="L298" class="LineNr">298 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[file too low: ]</span>
<span id="L299" class="LineNr">299 </span> print <a href='081print.mu.html#L16'>screen</a>, c
<span id="L300" class="LineNr">300 </span> <a href='081print.mu.html#L752'>cursor-to-next-line</a> <a href='081print.mu.html#L16'>screen</a>
<span id="L301" class="LineNr">301 </span> <span class="muControl"> return</span> <span class="Constant">0/dummy</span>,<span class="Constant"> false/don't-quit, true/error</span>
<span id="L302" class="LineNr">302 </span> <span class="Delimiter">}</span>
<span id="L303" class="LineNr">303 </span> <span class="Delimiter">{</span>
<span id="L304" class="LineNr">304 </span> below-max:bool <span class="Special"><-</span> lesser-than file,<span class="Constant"> 8</span>
<span id="L305" class="LineNr">305 </span> <span class="muControl">break-if</span> below-max
<span id="L306" class="LineNr">306 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[file too high: ]</span>
<span id="L307" class="LineNr">307 </span> print <a href='081print.mu.html#L16'>screen</a>, c
<span id="L308" class="LineNr">308 </span> <span class="muControl"> return</span> <span class="Constant">0/dummy</span>,<span class="Constant"> false/don't-quit, true/error</span>
<span id="L309" class="LineNr">309 </span> <span class="Delimiter">}</span>
<span id="L310" class="LineNr">310 </span> <span class="muControl"> return</span> file,<span class="Constant"> false/don't-quit, false/no-error</span>
<span id="L311" class="LineNr">311 </span>]
<span id="L312" class="LineNr">312 </span>
<span id="L313" class="LineNr">313 </span><span class="Comment"># valid values for rank: 0-7</span>
<span id="L314" class="LineNr">314 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L314'>read-rank</a> stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a><span class="muRecipe"> -> </span>rank:num, quit?:bool, error?:bool, stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a> [
<span id="L315" class="LineNr">315 </span> <span class="Constant">local-scope</span>
<span id="L316" class="LineNr">316 </span> <span class="Constant">load-inputs</span>
<span id="L317" class="LineNr">317 </span> c:char, eof?:bool, stdin <span class="Special"><-</span> read stdin
<span id="L318" class="LineNr">318 </span> <span class="muControl">return-if</span> eof?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L319" class="LineNr">319 </span> q-pressed?:bool <span class="Special"><-</span> equal c, <span class="Constant">81/Q</span>
<span id="L320" class="LineNr">320 </span> <span class="muControl">return-if</span> q-pressed?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L321" class="LineNr">321 </span> q-pressed? <span class="Special"><-</span> equal c, <span class="Constant">113/q</span>
<span id="L322" class="LineNr">322 </span> <span class="muControl">return-if</span> q-pressed?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L323" class="LineNr">323 </span> empty-fake-keyboard?:bool <span class="Special"><-</span> equal c, <span class="Constant">0/eof</span>
<span id="L324" class="LineNr">324 </span> <span class="muControl">return-if</span> empty-fake-keyboard?, <span class="Constant">0/dummy</span>,<span class="Constant"> true/quit, false/no-error</span>
<span id="L325" class="LineNr">325 </span> <span class="Delimiter">{</span>
<span id="L326" class="LineNr">326 </span> newline?:bool <span class="Special"><-</span> equal c,<span class="Constant"> 10</span> <span class="Comment"># newline</span>
<span id="L327" class="LineNr">327 </span> <span class="muControl">break-unless</span> newline?
<span id="L328" class="LineNr">328 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[that's not enough]</span>
<span id="L329" class="LineNr">329 </span> <span class="muControl"> return</span> <span class="Constant">0/dummy</span>,<span class="Constant"> false/don't-quite, true/error</span>
<span id="L330" class="LineNr">330 </span> <span class="Delimiter">}</span>
<span id="L331" class="LineNr">331 </span> rank:num <span class="Special"><-</span> subtract c, <span class="Constant">49/'1'</span>
<span id="L332" class="LineNr">332 </span> <span class="Comment"># assert'1' <= rank <= '8'</span>
<span id="L333" class="LineNr">333 </span> <span class="Delimiter">{</span>
<span id="L334" class="LineNr">334 </span> above-min:bool <span class="Special"><-</span> greater-or-equal rank,<span class="Constant"> 0</span>
<span id="L335" class="LineNr">335 </span> <span class="muControl">break-if</span> above-min
<span id="L336" class="LineNr">336 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[rank too low: ]</span>
<span id="L337" class="LineNr">337 </span> print <a href='081print.mu.html#L16'>screen</a>, c
<span id="L338" class="LineNr">338 </span> <span class="muControl"> return</span> <span class="Constant">0/dummy</span>,<span class="Constant"> false/don't-quite, true/error</span>
<span id="L339" class="LineNr">339 </span> <span class="Delimiter">}</span>
<span id="L340" class="LineNr">340 </span> <span class="Delimiter">{</span>
<span id="L341" class="LineNr">341 </span> below-max:bool <span class="Special"><-</span> lesser-or-equal rank,<span class="Constant"> 7</span>
<span id="L342" class="LineNr">342 </span> <span class="muControl">break-if</span> below-max
<span id="L343" class="LineNr">343 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[rank too high: ]</span>
<span id="L344" class="LineNr">344 </span> print <a href='081print.mu.html#L16'>screen</a>, c
<span id="L345" class="LineNr">345 </span> <span class="muControl"> return</span> <span class="Constant">0/dummy</span>,<span class="Constant"> false/don't-quite, true/error</span>
<span id="L346" class="LineNr">346 </span> <span class="Delimiter">}</span>
<span id="L347" class="LineNr">347 </span> <span class="muControl"> return</span> rank,<span class="Constant"> false/don't-quite, false/no-error</span>
<span id="L348" class="LineNr">348 </span>]
<span id="L349" class="LineNr">349 </span>
<span id="L350" class="LineNr">350 </span><span class="Comment"># read a character from the given channel and check that it's what we expect</span>
<span id="L351" class="LineNr">351 </span><span class="Comment"># return true on error</span>
<span id="L352" class="LineNr">352 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L352'>expect-from-channel</a> stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, expected:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a><span class="muRecipe"> -> </span>result:bool, stdin:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='081print.mu.html#L16'>screen</a>:&:<a href='081print.mu.html#L16'>screen</a> [
<span id="L353" class="LineNr">353 </span> <span class="Constant">local-scope</span>
<span id="L354" class="LineNr">354 </span> <span class="Constant">load-inputs</span>
<span id="L355" class="LineNr">355 </span> c:char, eof?:bool, stdin <span class="Special"><-</span> read stdin
<span id="L356" class="LineNr">356 </span> <span class="muControl">return-if</span> eof?<span class="Constant"> true</span>
<span id="L357" class="LineNr">357 </span> <span class="Delimiter">{</span>
<span id="L358" class="LineNr">358 </span> match?:bool <span class="Special"><-</span> equal c, expected
<span id="L359" class="LineNr">359 </span> <span class="muControl">break-if</span> match?
<span id="L360" class="LineNr">360 </span> print <a href='081print.mu.html#L16'>screen</a>, <span class="Constant">[expected character not found]</span>
<span id="L361" class="LineNr">361 </span> <span class="Delimiter">}</span>
<span id="L362" class="LineNr">362 </span> result <span class="Special"><-</span> not match?
<span id="L363" class="LineNr">363 </span>]
<span id="L364" class="LineNr">364 </span>
<span id="L365" class="LineNr">365 </span><span class="muScenario">scenario</span> read-move-blocking [
<span id="L366" class="LineNr">366 </span> <span class="Constant">local-scope</span>
<span id="L367" class="LineNr">367 </span> assume-screen <span class="Constant">20/width</span>, <span class="Constant">2/height</span>
<span id="L368" class="LineNr">368 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">2/capacity</span>
<span id="L369" class="LineNr">369 </span> read-move-routine:num/routine <span class="Special"><-</span> <span class="muControl">start-running</span> <a href='chessboard.mu.html#L248'>read-move</a>, <a href='075channel.mu.html#L36'>source</a>, <a href='081print.mu.html#L16'>screen</a>
<span id="L370" class="LineNr">370 </span> run [
<span id="L371" class="LineNr">371 </span> <span class="Comment"># 'read-move' is waiting for keypress</span>
<span id="L372" class="LineNr">372 </span> wait-for-routine-to-block read-move-routine
<span id="L373" class="LineNr">373 </span> read-move-state:num <span class="Special"><-</span> routine-state read-move-routine
<span id="L374" class="LineNr">374 </span> waiting?:bool <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L375" class="LineNr">375 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L376" class="LineNr">376 </span><span class="Constant">F read-move-blocking: routine failed to pause after coming up (before any keys were pressed)]</span>
<span id="L377" class="LineNr">377 </span> <span class="Comment"># press 'a'</span>
<span id="L378" class="LineNr">378 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">97/a</span>
<span id="L379" class="LineNr">379 </span> restart read-move-routine
<span id="L380" class="LineNr">380 </span> <span class="Comment"># 'read-move' still waiting for keypress</span>
<span id="L381" class="LineNr">381 </span> wait-for-routine-to-block read-move-routine
<span id="L382" class="LineNr">382 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L383" class="LineNr">383 </span> waiting? <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L384" class="LineNr">384 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L385" class="LineNr">385 </span><span class="Constant">F read-move-blocking: routine failed to pause after rank 'a']</span>
<span id="L386" class="LineNr">386 </span> <span class="Comment"># press '2'</span>
<span id="L387" class="LineNr">387 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">50/'2'</span>
<span id="L388" class="LineNr">388 </span> restart read-move-routine
<span id="L389" class="LineNr">389 </span> <span class="Comment"># 'read-move' still waiting for keypress</span>
<span id="L390" class="LineNr">390 </span> wait-for-routine-to-block read-move-routine
<span id="L391" class="LineNr">391 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L392" class="LineNr">392 </span> waiting? <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L393" class="LineNr">393 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L394" class="LineNr">394 </span><span class="Constant">F read-move-blocking: routine failed to pause after file 'a2']</span>
<span id="L395" class="LineNr">395 </span> <span class="Comment"># press '-'</span>
<span id="L396" class="LineNr">396 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">45/'-'</span>
<span id="L397" class="LineNr">397 </span> restart read-move-routine
<span id="L398" class="LineNr">398 </span> <span class="Comment"># 'read-move' still waiting for keypress</span>
<span id="L399" class="LineNr">399 </span> wait-for-routine-to-block read-move-routine
<span id="L400" class="LineNr">400 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L401" class="LineNr">401 </span> waiting? <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L402" class="LineNr">402 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L403" class="LineNr">403 </span><span class="Constant">F read-move-blocking: routine failed to pause after hyphen 'a2-']</span>
<span id="L404" class="LineNr">404 </span> <span class="Comment"># press 'a'</span>
<span id="L405" class="LineNr">405 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">97/a</span>
<span id="L406" class="LineNr">406 </span> restart read-move-routine
<span id="L407" class="LineNr">407 </span> <span class="Comment"># 'read-move' still waiting for keypress</span>
<span id="L408" class="LineNr">408 </span> wait-for-routine-to-block read-move-routine
<span id="L409" class="LineNr">409 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L410" class="LineNr">410 </span> waiting? <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L411" class="LineNr">411 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L412" class="LineNr">412 </span><span class="Constant">F read-move-blocking: routine failed to pause after rank 'a2-a']</span>
<span id="L413" class="LineNr">413 </span> <span class="Comment"># press '4'</span>
<span id="L414" class="LineNr">414 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">52/'4'</span>
<span id="L415" class="LineNr">415 </span> restart read-move-routine
<span id="L416" class="LineNr">416 </span> <span class="Comment"># 'read-move' still waiting for keypress</span>
<span id="L417" class="LineNr">417 </span> wait-for-routine-to-block read-move-routine
<span id="L418" class="LineNr">418 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L419" class="LineNr">419 </span> waiting? <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L420" class="LineNr">420 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L421" class="LineNr">421 </span><span class="Constant">F read-move-blocking: routine failed to pause after file 'a2-a4']</span>
<span id="L422" class="LineNr">422 </span> <span class="Comment"># press 'newline'</span>
<span id="L423" class="LineNr">423 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>,<span class="Constant"> 10</span> <span class="Comment"># newline</span>
<span id="L424" class="LineNr">424 </span> restart read-move-routine
<span id="L425" class="LineNr">425 </span> <span class="Comment"># 'read-move' now completes</span>
<span id="L426" class="LineNr">426 </span> wait-for-routine-to-block read-move-routine
<span id="L427" class="LineNr">427 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L428" class="LineNr">428 </span> completed?:bool <span class="Special"><-</span> equal read-move-state, <span class="Constant">1/completed</span>
<span id="L429" class="LineNr">429 </span> assert completed?, <span class="Constant">[ </span>
<span id="L430" class="LineNr">430 </span><span class="Constant">F read-move-blocking: routine failed to terminate on newline]</span>
<span id="L431" class="LineNr">431 </span> trace<span class="Constant"> 1</span>, <span class="Constant">[test]</span>, <span class="Constant">[reached end]</span>
<span id="L432" class="LineNr">432 </span> ]
<span id="L433" class="LineNr">433 </span> trace-should-contain [
<span id="L434" class="LineNr">434 </span> test: reached end
<span id="L435" class="LineNr">435 </span> ]
<span id="L436" class="LineNr">436 </span>]
<span id="L437" class="LineNr">437 </span>
<span id="L438" class="LineNr">438 </span><span class="muScenario">scenario</span> read-move-quit [
<span id="L439" class="LineNr">439 </span> <span class="Constant">local-scope</span>
<span id="L440" class="LineNr">440 </span> assume-screen <span class="Constant">20/width</span>, <span class="Constant">2/height</span>
<span id="L441" class="LineNr">441 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">2/capacity</span>
<span id="L442" class="LineNr">442 </span> read-move-routine:num <span class="Special"><-</span> <span class="muControl">start-running</span> <a href='chessboard.mu.html#L248'>read-move</a>, <a href='075channel.mu.html#L36'>source</a>, <a href='081print.mu.html#L16'>screen</a>
<span id="L443" class="LineNr">443 </span> run [
<span id="L444" class="LineNr">444 </span> <span class="Comment"># 'read-move' is waiting for keypress</span>
<span id="L445" class="LineNr">445 </span> wait-for-routine-to-block read-move-routine
<span id="L446" class="LineNr">446 </span> read-move-state:num <span class="Special"><-</span> routine-state read-move-routine
<span id="L447" class="LineNr">447 </span> waiting?:bool <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L448" class="LineNr">448 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L449" class="LineNr">449 </span><span class="Constant">F read-move-quit: routine failed to pause after coming up (before any keys were pressed)]</span>
<span id="L450" class="LineNr">450 </span> <span class="Comment"># press 'q'</span>
<span id="L451" class="LineNr">451 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">113/q</span>
<span id="L452" class="LineNr">452 </span> restart read-move-routine
<span id="L453" class="LineNr">453 </span> <span class="Comment"># 'read-move' completes</span>
<span id="L454" class="LineNr">454 </span> wait-for-routine-to-block read-move-routine
<span id="L455" class="LineNr">455 </span> read-move-state <span class="Special"><-</span> routine-state read-move-routine
<span id="L456" class="LineNr">456 </span> completed?:bool <span class="Special"><-</span> equal read-move-state, <span class="Constant">1/completed</span>
<span id="L457" class="LineNr">457 </span> assert completed?, <span class="Constant">[ </span>
<span id="L458" class="LineNr">458 </span><span class="Constant">F read-move-quit: routine failed to terminate on 'q']</span>
<span id="L459" class="LineNr">459 </span> trace<span class="Constant"> 1</span>, <span class="Constant">[test]</span>, <span class="Constant">[reached end]</span>
<span id="L460" class="LineNr">460 </span> ]
<span id="L461" class="LineNr">461 </span> trace-should-contain [
<span id="L462" class="LineNr">462 </span> test: reached end
<span id="L463" class="LineNr">463 </span> ]
<span id="L464" class="LineNr">464 </span>]
<span id="L465" class="LineNr">465 </span>
<span id="L466" class="LineNr">466 </span><span class="muScenario">scenario</span> read-move-illegal-file [
<span id="L467" class="LineNr">467 </span> <span class="Constant">local-scope</span>
<span id="L468" class="LineNr">468 </span> assume-screen <span class="Constant">20/width</span>, <span class="Constant">2/height</span>
<span id="L469" class="LineNr">469 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">2/capacity</span>
<span id="L470" class="LineNr">470 </span> read-move-routine:num <span class="Special"><-</span> <span class="muControl">start-running</span> <a href='chessboard.mu.html#L248'>read-move</a>, <a href='075channel.mu.html#L36'>source</a>, <a href='081print.mu.html#L16'>screen</a>
<span id="L471" class="LineNr">471 </span> run [
<span id="L472" class="LineNr">472 </span> <span class="Comment"># 'read-move' is waiting for keypress</span>
<span id="L473" class="LineNr">473 </span> wait-for-routine-to-block read-move-routine
<span id="L474" class="LineNr">474 </span> read-move-state:num <span class="Special"><-</span> routine-state read-move-routine
<span id="L475" class="LineNr">475 </span> waiting?:bool <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L476" class="LineNr">476 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L477" class="LineNr">477 </span><span class="Constant">F read-move-illegal-file: routine failed to pause after coming up (before any keys were pressed)]</span>
<span id="L478" class="LineNr">478 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">50/'2'</span>
<span id="L479" class="LineNr">479 </span> restart read-move-routine
<span id="L480" class="LineNr">480 </span> wait-for-routine-to-block read-move-routine
<span id="L481" class="LineNr">481 </span> ]
<span id="L482" class="LineNr">482 </span> screen-should-contain [
<span id="L483" class="LineNr">483 </span> <span class="Constant"> .file too low: 2 .</span>
<span id="L484" class="LineNr">484 </span> <span class="Constant"> . .</span>
<span id="L485" class="LineNr">485 </span> ]
<span id="L486" class="LineNr">486 </span>]
<span id="L487" class="LineNr">487 </span>
<span id="L488" class="LineNr">488 </span><span class="muScenario">scenario</span> read-move-illegal-rank [
<span id="L489" class="LineNr">489 </span> <span class="Constant">local-scope</span>
<span id="L490" class="LineNr">490 </span> assume-screen <span class="Constant">20/width</span>, <span class="Constant">2/height</span>
<span id="L491" class="LineNr">491 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">2/capacity</span>
<span id="L492" class="LineNr">492 </span> read-move-routine:num <span class="Special"><-</span> <span class="muControl">start-running</span> <a href='chessboard.mu.html#L248'>read-move</a>, <a href='075channel.mu.html#L36'>source</a>, <a href='081print.mu.html#L16'>screen</a>
<span id="L493" class="LineNr">493 </span> run [
<span id="L494" class="LineNr">494 </span> <span class="Comment"># 'read-move' is waiting for keypress</span>
<span id="L495" class="LineNr">495 </span> wait-for-routine-to-block read-move-routine
<span id="L496" class="LineNr">496 </span> read-move-state:num <span class="Special"><-</span> routine-state read-move-routine
<span id="L497" class="LineNr">497 </span> waiting?:bool <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L498" class="LineNr">498 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L499" class="LineNr">499 </span><span class="Constant">F read-move-illegal-rank: routine failed to pause after coming up (before any keys were pressed)]</span>
<span id="L500" class="LineNr">500 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">97/a</span>
<span id="L501" class="LineNr">501 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">97/a</span>
<span id="L502" class="LineNr">502 </span> restart read-move-routine
<span id="L503" class="LineNr">503 </span> wait-for-routine-to-block read-move-routine
<span id="L504" class="LineNr">504 </span> ]
<span id="L505" class="LineNr">505 </span> screen-should-contain [
<span id="L506" class="LineNr">506 </span> <span class="Constant"> .rank too high: a .</span>
<span id="L507" class="LineNr">507 </span> <span class="Constant"> . .</span>
<span id="L508" class="LineNr">508 </span> ]
<span id="L509" class="LineNr">509 </span>]
<span id="L510" class="LineNr">510 </span>
<span id="L511" class="LineNr">511 </span><span class="muScenario">scenario</span> read-move-empty [
<span id="L512" class="LineNr">512 </span> <span class="Constant">local-scope</span>
<span id="L513" class="LineNr">513 </span> assume-screen <span class="Constant">20/width</span>, <span class="Constant">2/height</span>
<span id="L514" class="LineNr">514 </span> <a href='075channel.mu.html#L36'>source</a>:&:<a href='075channel.mu.html#L36'>source</a>:char, <a href='075channel.mu.html#L40'>sink</a>:&:<a href='075channel.mu.html#L40'>sink</a>:char <span class="Special"><-</span> <a href='075channel.mu.html#L44'>new-channel</a> <span class="Constant">2/capacity</span>
<span id="L515" class="LineNr">515 </span> read-move-routine:num <span class="Special"><-</span> <span class="muControl">start-running</span> <a href='chessboard.mu.html#L248'>read-move</a>, <a href='075channel.mu.html#L36'>source</a>, <a href='081print.mu.html#L16'>screen</a>
<span id="L516" class="LineNr">516 </span> run [
<span id="L517" class="LineNr">517 </span> <span class="Comment"># 'read-move' is waiting for keypress</span>
<span id="L518" class="LineNr">518 </span> wait-for-routine-to-block read-move-routine
<span id="L519" class="LineNr">519 </span> read-move-state:num <span class="Special"><-</span> routine-state read-move-routine
<span id="L520" class="LineNr">520 </span> waiting?:bool <span class="Special"><-</span> not-equal read-move-state, <span class="Constant">2/discontinued</span>
<span id="L521" class="LineNr">521 </span> assert waiting?, <span class="Constant">[ </span>
<span id="L522" class="LineNr">522 </span><span class="Constant">F read-move-empty: routine failed to pause after coming up (before any keys were pressed)]</span>
<span id="L523" class="LineNr">523 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">10/newline</span>
<span id="L524" class="LineNr">524 </span> <a href='075channel.mu.html#L40'>sink</a> <span class="Special"><-</span> <a href='075channel.mu.html#L60'>write</a> <a href='075channel.mu.html#L40'>sink</a>, <span class="Constant">97/a</span>
<span id="L525" class="LineNr">525 </span> restart read-move-routine
<span id="L526" class="LineNr">526 </span> wait-for-routine-to-block read-move-routine
<span id="L527" class="LineNr">527 </span> ]
<span id="L528" class="LineNr">528 </span> screen-should-contain [
<span id="L529" class="LineNr">529 </span> <span class="Constant"> .that's not enough .</span>
<span id="L530" class="LineNr">530 </span> <span class="Constant"> . .</span>
<span id="L531" class="LineNr">531 </span> ]
<span id="L532" class="LineNr">532 </span>]
<span id="L533" class="LineNr">533 </span>
<span id="L534" class="LineNr">534 </span><span class="muRecipe">def</span> <a href='chessboard.mu.html#L534'>make-move</a> <a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a>, m:&:<a href='chessboard.mu.html#L239'>move</a><span class="muRecipe"> -> </span><a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a> [
<span id="L535" class="LineNr">535 </span> <span class="Constant">local-scope</span>
<span id="L536" class="LineNr">536 </span> <span class="Constant">load-inputs</span>
<span id="L537" class="LineNr">537 </span> from-file:num <span class="Special"><-</span> get *m, <span class="Constant">from-file:offset</span>
<span id="L538" class="LineNr">538 </span> from-rank:num <span class="Special"><-</span> get *m, <span class="Constant">from-rank:offset</span>
<span id="L539" class="LineNr">539 </span> to-file:num <span class="Special"><-</span> get *m, <span class="Constant">to-file:offset</span>
<span id="L540" class="LineNr">540 </span> to-rank:num <span class="Special"><-</span> get *m, <span class="Constant">to-rank:offset</span>
<span id="L541" class="LineNr">541 </span> from-f:&:@:char <span class="Special"><-</span> index *board, from-file
<span id="L542" class="LineNr">542 </span> to-f:&:@:char <span class="Special"><-</span> index *board, to-file
<span id="L543" class="LineNr">543 </span> src:char/square <span class="Special"><-</span> index *from-f, from-rank
<span id="L544" class="LineNr">544 </span> *to-f <span class="Special"><-</span> put-index *to-f, to-rank, src
<span id="L545" class="LineNr">545 </span> *from-f <span class="Special"><-</span> put-index *from-f, from-rank, <span class="Constant">32/space</span>
<span id="L546" class="LineNr">546 </span>]
<span id="L547" class="LineNr">547 </span>
<span id="L548" class="LineNr">548 </span><span class="muScenario">scenario</span> making-a-move [
<span id="L549" class="LineNr">549 </span> <span class="Constant">local-scope</span>
<span id="L550" class="LineNr">550 </span> assume-screen <span class="Constant">30/width</span>, <span class="Constant">12/height</span>
<span id="L551" class="LineNr">551 </span> <a href='chessboard.mu.html#L67'>board</a>:<a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L190'>initial-position</a>
<span id="L552" class="LineNr">552 </span> <a href='chessboard.mu.html#L239'>move</a>:&:<a href='chessboard.mu.html#L239'>move</a> <span class="Special"><-</span> new <span class="Constant"><a href='chessboard.mu.html#L239'>move</a>:type</span>
<span id="L553" class="LineNr">553 </span> *move <span class="Special"><-</span> merge <span class="Constant">6/g</span>, <span class="Constant">1/'2'</span>, <span class="Constant">6/g</span>, <span class="Constant">3/'4'</span>
<span id="L554" class="LineNr">554 </span> run [
<span id="L555" class="LineNr">555 </span> <a href='chessboard.mu.html#L67'>board</a> <span class="Special"><-</span> <a href='chessboard.mu.html#L534'>make-move</a> <a href='chessboard.mu.html#L67'>board</a>, <a href='chessboard.mu.html#L239'>move</a>
<span id="L556" class="LineNr">556 </span> <a href='081print.mu.html#L16'>screen</a> <span class="Special"><-</span> print <a href='081print.mu.html#L16'>screen</a>, <a href='chessboard.mu.html#L67'>board</a>
<span id="L557" class="LineNr">557 </span> ]
<span id="L558" class="LineNr">558 </span> screen-should-contain [
<span id="L559" class="LineNr">559 </span> <span class="Comment"># 012345678901234567890123456789</span>
<span id="L560" class="LineNr">560 </span> <span class="Constant"> .8 | r n b q k b n r .</span>
<span id="L561" class="LineNr">561 </span> <span class="Constant"> .7 | p p p p p p p p .</span>
<span id="L562" class="LineNr">562 </span> <span class="Constant"> .6 | .</span>
<span id="L563" class="LineNr">563 </span> <span class="Constant"> .5 | .</span>
<span id="L564" class="LineNr">564 </span> <span class="Constant"> .4 | P .</span>
<span id="L565" class="LineNr">565 </span> <span class="Constant"> .3 | .</span>
<span id="L566" class="LineNr">566 </span> <span class="Constant"> .2 | P P P P P P P .</span>
<span id="L567" class="LineNr">567 </span> <span class="Constant"> .1 | R N B Q K B N R .</span>
<span id="L568" class="LineNr">568 </span> <span class="Constant"> . +---------------- .</span>
<span id="L569" class="LineNr">569 </span> <span class="Constant"> . a b c d e f g h .</span>
<span id="L570" class="LineNr">570 </span> <span class="Constant"> . .</span>
<span id="L571" class="LineNr">571 </span> ]
<span id="L572" class="LineNr">572 </span>]
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->
|