about summary refs log tree commit diff stats
path: root/html/054static_dispatch.cc.html
blob: cfcbde40476197bbdd9e8b1ad93f4a3047142ea0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
<!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 - 054static_dispatch.cc</title>
<meta name="Generator" content="Vim/7.4">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="cpp">
<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; }
.Constant { color: #00a0a0; }
.traceAbsent { color: #c00000; }
.cSpecial { color: #008000; }
.traceContains { color: #008000; }
.Comment { color: #9090ff; }
.Delimiter { color: #800080; }
.Special { color: #c00000; }
.Identifier { color: #fcb165; }
.Normal { color: #eeeeee; background-color: #080808; padding-bottom: 1px; }
-->
</style>

<script type='text/javascript'>
<!--

-->
</script>
</head>
<body>
<pre id='vimCodeElement'>
<span class="Comment">//: Transform to maintain multiple variants of a recipe depending on the</span>
<span class="Comment">//: number and types of the ingredients and products. Allows us to use nice</span>
<span class="Comment">//: names like 'print' or 'length' in many mutually extensible ways.</span>

<span class="Delimiter">:(scenario static_dispatch)</span>
def main [
  <span class="Constant">7</span>:num/<span class="Special">raw &lt;- </span>test <span class="Constant">3</span>
]
def test a:num <span class="Delimiter">-&gt;</span> z:num [
  z<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
def test a:num<span class="Delimiter">,</span> b:num <span class="Delimiter">-&gt;</span> z:num [
  z<span class="Special"> &lt;- </span>copy <span class="Constant">2</span>
]
<span class="traceContains">+mem: storing 1 in location 7</span>

<span class="Comment">//: When loading recipes, accumulate variants if headers don't collide, and</span>
<span class="Comment">//: flag an error if headers collide.</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;string<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt; &gt; Recipe_variants<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
put<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> <span class="Constant">&quot;main&quot;</span><span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt;<span class="Delimiter">());</span>  <span class="Comment">// since we manually added main to Recipe_ordinal</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
map&lt;string<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt; &gt; Recipe_variants_snapshot<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End save_snapshots&quot;)</span>
Recipe_variants_snapshot = Recipe_variants<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End restore_snapshots&quot;)</span>
Recipe_variants = Recipe_variants_snapshot<span class="Delimiter">;</span>

<span class="Delimiter">:(before &quot;End Load Recipe Header(result)&quot;)</span>
<span class="Comment">// there can only ever be one variant for main</span>
<span class="Normal">if</span> <span class="Delimiter">(</span>result<span class="Delimiter">.</span>name != <span class="Constant">&quot;main&quot;</span> &amp;&amp; contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">))</span> <span class="Delimiter">{</span>
  <span class="Normal">const</span> recipe_ordinal r = get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">)</span> || get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">).</span>has_header<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    string new_name = matching_variant_name<span class="Delimiter">(</span>result<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>new_name<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
      <span class="Comment">// variant doesn't already exist</span>
      new_name = next_unused_recipe_name<span class="Delimiter">(</span>result<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
      put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> new_name<span class="Delimiter">,</span> Next_recipe_ordinal++<span class="Delimiter">);</span>
      get_or_insert<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> new_name<span class="Delimiter">));</span>
    <span class="Delimiter">}</span>
    trace<span class="Delimiter">(</span><span class="Constant">9999</span><span class="Delimiter">,</span> <span class="Constant">&quot;load&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;switching &quot;</span> &lt;&lt; result<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot; to &quot;</span> &lt;&lt; new_name &lt;&lt; end<span class="Delimiter">();</span>
    result<span class="Delimiter">.</span>name = new_name<span class="Delimiter">;</span>
    result<span class="Delimiter">.</span>is_autogenerated = <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>
<span class="Normal">else</span> <span class="Delimiter">{</span>
  <span class="Comment">// save first variant</span>
  put<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">,</span> Next_recipe_ordinal++<span class="Delimiter">);</span>
  get_or_insert<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">).</span>push_back<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> result<span class="Delimiter">.</span>name<span class="Delimiter">));</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(code)</span>
string matching_variant_name<span class="Delimiter">(</span><span class="Normal">const</span> recipe&amp; rr<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">const</span> vector&lt;recipe_ordinal&gt;&amp; variants = get_or_insert<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> rr<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>variants<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Normal">const</span> recipe&amp; candidate = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!all_reagents_match<span class="Delimiter">(</span>rr<span class="Delimiter">,</span> candidate<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Identifier">return</span> candidate<span class="Delimiter">.</span>name<span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> all_reagents_match<span class="Delimiter">(</span><span class="Normal">const</span> recipe&amp; r1<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; r2<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span> != SIZE<span class="Delimiter">(</span>r2<span class="Delimiter">.</span>ingredients<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>products<span class="Delimiter">)</span> != SIZE<span class="Delimiter">(</span>r2<span class="Delimiter">.</span>products<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    expand_type_abbreviations<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
    expand_type_abbreviations<span class="Delimiter">(</span>r2<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!deeply_equal_type_names<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> r2<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    expand_type_abbreviations<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
    expand_type_abbreviations<span class="Delimiter">(</span>r2<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!deeply_equal_type_names<span class="Delimiter">(</span>r1<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> r2<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
set&lt;string&gt; Literal_type_names<span class="Delimiter">;</span>
<span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
Literal_type_names<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">&quot;number&quot;</span><span class="Delimiter">);</span>
Literal_type_names<span class="Delimiter">.</span>insert<span class="Delimiter">(</span><span class="Constant">&quot;character&quot;</span><span class="Delimiter">);</span>
<span class="Delimiter">:(code)</span>
<span class="Normal">bool</span> deeply_equal_type_names<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; a<span class="Delimiter">,</span> <span class="Normal">const</span> reagent&amp; b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> deeply_equal_type_names<span class="Delimiter">(</span>a<span class="Delimiter">.</span>type<span class="Delimiter">,</span> b<span class="Delimiter">.</span>type<span class="Delimiter">);</span>
<span class="Delimiter">}</span>
<span class="Normal">bool</span> deeply_equal_type_names<span class="Delimiter">(</span><span class="Normal">const</span> type_tree* a<span class="Delimiter">,</span> <span class="Normal">const</span> type_tree* b<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!a<span class="Delimiter">)</span> <span class="Identifier">return</span> !b<span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!b<span class="Delimiter">)</span> <span class="Identifier">return</span> !a<span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;literal&quot;</span> &amp;&amp; b<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;literal&quot;</span><span class="Delimiter">)</span>
    <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;literal&quot;</span><span class="Delimiter">)</span>
    <span class="Identifier">return</span> Literal_type_names<span class="Delimiter">.</span>find<span class="Delimiter">(</span>b<span class="Delimiter">-&gt;</span>name<span class="Delimiter">)</span> != Literal_type_names<span class="Delimiter">.</span>end<span class="Delimiter">();</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>b<span class="Delimiter">-&gt;</span>name == <span class="Constant">&quot;literal&quot;</span><span class="Delimiter">)</span>
    <span class="Identifier">return</span> Literal_type_names<span class="Delimiter">.</span>find<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>name<span class="Delimiter">)</span> != Literal_type_names<span class="Delimiter">.</span>end<span class="Delimiter">();</span>
  <span class="Identifier">return</span> a<span class="Delimiter">-&gt;</span>name == b<span class="Delimiter">-&gt;</span>name
      &amp;&amp; deeply_equal_type_names<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>left<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>left<span class="Delimiter">)</span>
      &amp;&amp; deeply_equal_type_names<span class="Delimiter">(</span>a<span class="Delimiter">-&gt;</span>right<span class="Delimiter">,</span> b<span class="Delimiter">-&gt;</span>right<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

string next_unused_recipe_name<span class="Delimiter">(</span><span class="Normal">const</span> string&amp; recipe_name<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">2</span><span class="Delimiter">;</span> <span class="Delimiter">;</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    ostringstream out<span class="Delimiter">;</span>
    out &lt;&lt; recipe_name &lt;&lt; <span class="Constant">'_'</span> &lt;&lt; i<span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!contains_key<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> out<span class="Delimiter">.</span>str<span class="Delimiter">()))</span>
      <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

<span class="Comment">//: Once all the recipes are loaded, transform their bodies to replace each</span>
<span class="Comment">//: call with the most suitable variant.</span>

<span class="Delimiter">:(scenario static_dispatch_picks_most_similar_variant)</span>
def main [
  <span class="Constant">7</span>:num/<span class="Special">raw &lt;- </span>test <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span><span class="Delimiter">,</span> <span class="Constant">5</span>
]
def test a:num <span class="Delimiter">-&gt;</span> z:num [
  z<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
def test a:num<span class="Delimiter">,</span> b:num <span class="Delimiter">-&gt;</span> z:num [
  z<span class="Special"> &lt;- </span>copy <span class="Constant">2</span>
]
<span class="traceContains">+mem: storing 2 in location 7</span>

<span class="Comment">//: support recipe headers in a previous transform to fill in missing types</span>
<span class="Delimiter">:(before &quot;End check_or_set_invalid_types&quot;)</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
  check_or_set_invalid_types<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">),</span> <span class="Constant">&quot;recipe header ingredient&quot;</span><span class="Delimiter">);</span>
<span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
  check_or_set_invalid_types<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">).</span>type<span class="Delimiter">,</span> maybe<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>name<span class="Delimiter">),</span> <span class="Constant">&quot;recipe header product&quot;</span><span class="Delimiter">);</span>

<span class="Comment">//: after filling in all missing types (because we'll be introducing 'blank' types in this transform in a later layer, for shape-shifting recipes)</span>
<span class="Delimiter">:(after &quot;Transform.push_back(transform_names)&quot;)</span>
Transform<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>resolve_ambiguous_calls<span class="Delimiter">);</span>  <span class="Comment">// idempotent</span>

<span class="Comment">//: In a later layer we'll introduce recursion in resolve_ambiguous_calls, by</span>
<span class="Comment">//: having it generate code for shape-shifting recipes and then transform such</span>
<span class="Comment">//: code. This data structure will help error messages be more useful.</span>
<span class="Comment">//:</span>
<span class="Comment">//: We're punning the 'call' data structure just because it has slots for</span>
<span class="Comment">//: calling recipe and calling instruction.</span>
<span class="Delimiter">:(before &quot;End Globals&quot;)</span>
list&lt;call&gt; resolve_stack<span class="Delimiter">;</span>

<span class="Delimiter">:(code)</span>
<span class="Normal">void</span> resolve_ambiguous_calls<span class="Delimiter">(</span>recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  recipe&amp; caller_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">);</span>
  trace<span class="Delimiter">(</span><span class="Constant">9991</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;--- resolve ambiguous calls for recipe &quot;</span> &lt;&lt; caller_recipe<span class="Delimiter">.</span>name &lt;&lt; end<span class="Delimiter">();</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> index = <span class="Constant">0</span><span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    instruction&amp; inst = caller_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>is_label<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>non_ghost_size<span class="Delimiter">(</span>get_or_insert<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>name<span class="Delimiter">))</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;instruction &quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; end<span class="Delimiter">();</span>
    resolve_stack<span class="Delimiter">.</span>push_front<span class="Delimiter">(</span>call<span class="Delimiter">(</span>r<span class="Delimiter">));</span>
    resolve_stack<span class="Delimiter">.</span>front<span class="Delimiter">().</span>running_step_index = index<span class="Delimiter">;</span>
    string new_name = best_variant<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> caller_recipe<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!new_name<span class="Delimiter">.</span>empty<span class="Delimiter">())</span>
      inst<span class="Delimiter">.</span>name = new_name<span class="Delimiter">;</span>
    assert<span class="Delimiter">(</span>resolve_stack<span class="Delimiter">.</span>front<span class="Delimiter">().</span>running_recipe == r<span class="Delimiter">);</span>
    assert<span class="Delimiter">(</span>resolve_stack<span class="Delimiter">.</span>front<span class="Delimiter">().</span>running_step_index == index<span class="Delimiter">);</span>
    resolve_stack<span class="Delimiter">.</span>pop_front<span class="Delimiter">();</span>
  <span class="Delimiter">}</span>
<span class="Delimiter">}</span>

string best_variant<span class="Delimiter">(</span>instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; caller_recipe<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  vector&lt;recipe_ordinal&gt;&amp; variants = get<span class="Delimiter">(</span>Recipe_variants<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>name<span class="Delimiter">);</span>
  vector&lt;recipe_ordinal&gt; candidates<span class="Delimiter">;</span>

  <span class="Comment">// Static Dispatch Phase 1</span>
  candidates = strictly_matching_variants<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> variants<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!candidates<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> best_variant<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> candidates<span class="Delimiter">).</span>name<span class="Delimiter">;</span>

  <span class="Comment">// Static Dispatch Phase 2</span>
  candidates = strictly_matching_variants_except_literal_zero_against_address<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> variants<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!candidates<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> best_variant<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> candidates<span class="Delimiter">).</span>name<span class="Delimiter">;</span>

  <span class="Comment">// Static Dispatch Phase 3</span>
  <span class="Comment">//: (shape-shifting recipes in a later layer)</span>
  <span class="Comment">// End Static Dispatch Phase 3</span>

  <span class="Comment">// Static Dispatch Phase 4</span>
  candidates = strictly_matching_variants_except_literal_against_address_or_boolean<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> variants<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!candidates<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> best_variant<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> candidates<span class="Delimiter">).</span>name<span class="Delimiter">;</span>

  <span class="Comment">// Static Dispatch Phase 5</span>
  candidates = matching_variants<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> variants<span class="Delimiter">);</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!candidates<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Identifier">return</span> best_variant<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> candidates<span class="Delimiter">).</span>name<span class="Delimiter">;</span>

  <span class="Comment">// error messages</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe_ordinal<span class="Delimiter">,</span> inst<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &gt;= MAX_PRIMITIVE_RECIPES<span class="Delimiter">)</span> <span class="Delimiter">{</span>  <span class="Comment">// we currently don't check types for primitive variants</span>
    raise &lt;&lt; maybe<span class="Delimiter">(</span>caller_recipe<span class="Delimiter">.</span>name<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;failed to find a matching call for '&quot;</span> &lt;&lt; inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">for</span> <span class="Delimiter">(</span>list&lt;call&gt;::iterator p = <span class="Comment">/*</span><span class="Comment">skip</span><span class="Comment">*/</span>++resolve_stack<span class="Delimiter">.</span>begin<span class="Delimiter">();</span> p != resolve_stack<span class="Delimiter">.</span>end<span class="Delimiter">();</span> ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      <span class="Normal">const</span> recipe&amp; specializer_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> p<span class="Delimiter">-&gt;</span>running_recipe<span class="Delimiter">);</span>
      <span class="Normal">const</span> instruction&amp; specializer_inst = specializer_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span>running_step_index<span class="Delimiter">);</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>specializer_recipe<span class="Delimiter">.</span>name != <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span>
        raise &lt;&lt; <span class="Constant">&quot;  (from '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>specializer_inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;' in &quot;</span> &lt;&lt; specializer_recipe<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;)</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Normal">else</span>
        raise &lt;&lt; <span class="Constant">&quot;  (from '&quot;</span> &lt;&lt; to_original_string<span class="Delimiter">(</span>specializer_inst<span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;')</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Comment">// One special-case to help with the rewrite_stash transform. (cross-layer)</span>
      <span class="Normal">if</span> <span class="Delimiter">(</span>specializer_inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">).</span>name<span class="Delimiter">.</span>find<span class="Delimiter">(</span><span class="Constant">&quot;stash_&quot;</span><span class="Delimiter">)</span> == <span class="Constant">0</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
        instruction stash_inst<span class="Delimiter">;</span>
        <span class="Normal">if</span> <span class="Delimiter">(</span>next_stash<span class="Delimiter">(</span>*p<span class="Delimiter">,</span> &amp;stash_inst<span class="Delimiter">))</span> <span class="Delimiter">{</span>
          <span class="Normal">if</span> <span class="Delimiter">(</span>specializer_recipe<span class="Delimiter">.</span>name != <span class="Constant">&quot;interactive&quot;</span><span class="Delimiter">)</span>
            raise &lt;&lt; <span class="Constant">&quot;  (part of '&quot;</span> &lt;&lt; stash_inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;' in &quot;</span> &lt;&lt; specializer_recipe<span class="Delimiter">.</span>name &lt;&lt; <span class="Constant">&quot;)</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
          <span class="Normal">else</span>
            raise &lt;&lt; <span class="Constant">&quot;  (part of '&quot;</span> &lt;&lt; stash_inst<span class="Delimiter">.</span>original_string &lt;&lt; <span class="Constant">&quot;')</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
        <span class="Delimiter">}</span>
      <span class="Delimiter">}</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">// phase 1</span>
vector&lt;recipe_ordinal&gt; strictly_matching_variants<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt;&amp; variants<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  vector&lt;recipe_ordinal&gt; result<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>variants<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;checking variant (strict) &quot;</span> &lt;&lt; i &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; header_label<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>all_header_reagents_strictly_match<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))))</span>
      result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> all_header_reagents_strictly_match<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; variant<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_strictly_match<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;strict match failed: ingredient &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>is_dummy<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_strictly_match<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;strict match failed: product &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">// phase 2</span>
vector&lt;recipe_ordinal&gt; strictly_matching_variants_except_literal_zero_against_address<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt;&amp; variants<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  vector&lt;recipe_ordinal&gt; result<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>variants<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;checking variant (strict except literal-zero-against-address) &quot;</span> &lt;&lt; i &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; header_label<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>all_header_reagents_strictly_match_except_literal_zero_against_address<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))))</span>
      result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> all_header_reagents_strictly_match_except_literal_zero_against_address<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; variant<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_strictly_match_except_literal_zero_against_address<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;match failed: ingredient &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>is_dummy<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_strictly_match<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;match failed: product &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> types_strictly_match_except_literal_zero_against_address<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; to<span class="Delimiter">,</span> <span class="Normal">const</span> reagent&amp; from<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>from<span class="Delimiter">)</span> &amp;&amp; is_mu_address<span class="Delimiter">(</span>to<span class="Delimiter">))</span>
    <span class="Identifier">return</span> from<span class="Delimiter">.</span>name == <span class="Constant">&quot;0&quot;</span><span class="Delimiter">;</span>
  <span class="Identifier">return</span> types_strictly_match<span class="Delimiter">(</span>to<span class="Delimiter">,</span> from<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Comment">// phase 4</span>
vector&lt;recipe_ordinal&gt; strictly_matching_variants_except_literal_against_address_or_boolean<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt;&amp; variants<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  vector&lt;recipe_ordinal&gt; result<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>variants<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;checking variant (strict except literal-against-boolean) &quot;</span> &lt;&lt; i &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; header_label<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>all_header_reagents_strictly_match_except_literal_against_address_or_boolean<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))))</span>
      result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> all_header_reagents_strictly_match_except_literal_against_address_or_boolean<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; variant<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_strictly_match_except_literal_against_address_or_boolean<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;match failed: ingredient &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>is_dummy<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_strictly_match_except_literal_against_address_or_boolean<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;match failed: product &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> types_strictly_match_except_literal_against_address_or_boolean<span class="Delimiter">(</span><span class="Normal">const</span> reagent&amp; to<span class="Delimiter">,</span> <span class="Normal">const</span> reagent&amp; from<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>is_literal<span class="Delimiter">(</span>from<span class="Delimiter">)</span> &amp;&amp; is_mu_boolean<span class="Delimiter">(</span>to<span class="Delimiter">))</span>
    <span class="Identifier">return</span> from<span class="Delimiter">.</span>name == <span class="Constant">&quot;0&quot;</span> || from<span class="Delimiter">.</span>name == <span class="Constant">&quot;1&quot;</span><span class="Delimiter">;</span>
  <span class="Identifier">return</span> types_strictly_match_except_literal_zero_against_address<span class="Delimiter">(</span>to<span class="Delimiter">,</span> from<span class="Delimiter">);</span>
<span class="Delimiter">}</span>

<span class="Comment">// phase 5</span>
vector&lt;recipe_ordinal&gt; matching_variants<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt;&amp; variants<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  vector&lt;recipe_ordinal&gt; result<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>variants<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == -<span class="Constant">1</span><span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    trace<span class="Delimiter">(</span><span class="Constant">9992</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;checking variant &quot;</span> &lt;&lt; i &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; header_label<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))</span> &lt;&lt; end<span class="Delimiter">();</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>all_header_reagents_match<span class="Delimiter">(</span>inst<span class="Delimiter">,</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">))))</span>
      result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> all_header_reagents_match<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> <span class="Normal">const</span> recipe&amp; variant<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_match<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;match failed: ingredient &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; min<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">),</span> SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">));</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>is_dummy<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>!types_match<span class="Delimiter">(</span>variant<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">),</span> inst<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)))</span> <span class="Delimiter">{</span>
      trace<span class="Delimiter">(</span><span class="Constant">9993</span><span class="Delimiter">,</span> <span class="Constant">&quot;transform&quot;</span><span class="Delimiter">)</span> &lt;&lt; <span class="Constant">&quot;match failed: product &quot;</span> &lt;&lt; i &lt;&lt; end<span class="Delimiter">();</span>
      <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Comment">// tie-breaker for each phase</span>
<span class="Normal">const</span> recipe&amp; best_variant<span class="Delimiter">(</span><span class="Normal">const</span> instruction&amp; inst<span class="Delimiter">,</span> vector&lt;recipe_ordinal&gt;&amp; candidates<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  assert<span class="Delimiter">(</span>!candidates<span class="Delimiter">.</span>empty<span class="Delimiter">());</span>
  <span class="Normal">int</span> min_score = <span class="Constant">999</span><span class="Delimiter">;</span>
  <span class="Normal">int</span> min_index = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>candidates<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">const</span> recipe&amp; candidate = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> candidates<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
    <span class="Normal">int</span> score = abs<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>candidate<span class="Delimiter">.</span>products<span class="Delimiter">)</span>-SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>products<span class="Delimiter">))</span>
                          + abs<span class="Delimiter">(</span>SIZE<span class="Delimiter">(</span>candidate<span class="Delimiter">.</span>ingredients<span class="Delimiter">)</span>-SIZE<span class="Delimiter">(</span>inst<span class="Delimiter">.</span>ingredients<span class="Delimiter">));</span>
    assert<span class="Delimiter">(</span>score &lt; <span class="Constant">999</span><span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>score &lt; min_score<span class="Delimiter">)</span> <span class="Delimiter">{</span>
      min_score = score<span class="Delimiter">;</span>
      min_index = i<span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> candidates<span class="Delimiter">.</span>at<span class="Delimiter">(</span>min_index<span class="Delimiter">));</span>
<span class="Delimiter">}</span>

<span class="Normal">int</span> non_ghost_size<span class="Delimiter">(</span>vector&lt;recipe_ordinal&gt;&amp; variants<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">int</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>variants<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>variants<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> != -<span class="Constant">1</span><span class="Delimiter">)</span> ++result<span class="Delimiter">;</span>
  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Normal">bool</span> next_stash<span class="Delimiter">(</span><span class="Normal">const</span> call&amp; c<span class="Delimiter">,</span> instruction* stash_inst<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Normal">const</span> recipe&amp; specializer_recipe = get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> c<span class="Delimiter">.</span>running_recipe<span class="Delimiter">);</span>
  <span class="Normal">int</span> index = c<span class="Delimiter">.</span>running_step_index<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span>++index<span class="Delimiter">;</span> index &lt; SIZE<span class="Delimiter">(</span>specializer_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">);</span> ++index<span class="Delimiter">)</span> <span class="Delimiter">{</span>
    <span class="Normal">const</span> instruction&amp; inst = specializer_recipe<span class="Delimiter">.</span>steps<span class="Delimiter">.</span>at<span class="Delimiter">(</span>index<span class="Delimiter">);</span>
    <span class="Normal">if</span> <span class="Delimiter">(</span>inst<span class="Delimiter">.</span>name == <span class="Constant">&quot;stash&quot;</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
      *stash_inst = inst<span class="Delimiter">;</span>
      <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
    <span class="Delimiter">}</span>
  <span class="Delimiter">}</span>
  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario static_dispatch_disabled_in_recipe_without_variants)</span>
def main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>test <span class="Constant">3</span>
]
def test [
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>next-ingredient  <span class="Comment"># ensure no header</span>
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
<span class="traceContains">+mem: storing 34 in location 1</span>

<span class="Delimiter">:(scenario static_dispatch_disabled_on_headerless_definition)</span>
<span class="Special">% Hide_errors = true;</span>
def test a:num <span class="Delimiter">-&gt;</span> z:num [
  z<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
def test [
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
<span class="traceContains">+error: redefining recipe test</span>

<span class="Delimiter">:(scenario static_dispatch_disabled_on_headerless_definition_2)</span>
<span class="Special">% Hide_errors = true;</span>
def test [
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def test a:num <span class="Delimiter">-&gt;</span> z:num [
  z<span class="Special"> &lt;- </span>copy <span class="Constant">1</span>
]
<span class="traceContains">+error: redefining recipe test</span>

<span class="Delimiter">:(scenario static_dispatch_on_primitive_names)</span>
def main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">3</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">1</span>:num<span class="Delimiter">,</span> <span class="Constant">2</span>:num
  <span class="Constant">4</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/<span class="Constant">false</span>
  <span class="Constant">5</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/<span class="Constant">false</span>
  <span class="Constant">6</span>:<span class="Normal">bool</span><span class="Special"> &lt;- </span>equal <span class="Constant">4</span>:<span class="Normal">bool</span><span class="Delimiter">,</span> <span class="Constant">5</span>:<span class="Normal">bool</span>
]
<span class="Comment"># temporarily hardcode number equality to always fail</span>
def equal x:num<span class="Delimiter">,</span> y:num <span class="Delimiter">-&gt;</span> z:<span class="Normal">bool</span> [
  local-scope
  load-ingredients
  z<span class="Special"> &lt;- </span>copy <span class="Constant">0</span>/<span class="Constant">false</span>
]
<span class="Comment"># comparing numbers used overload</span>
<span class="traceContains">+mem: storing 0 in location 3</span>
<span class="Comment"># comparing booleans continues to use primitive</span>
<span class="traceContains">+mem: storing 1 in location 6</span>

<span class="Delimiter">:(scenario static_dispatch_works_with_dummy_results_for_containers)</span>
def main [
  _<span class="Special"> &lt;- </span>test <span class="Constant">3</span><span class="Delimiter">,</span> <span class="Constant">4</span>
]
def test a:num <span class="Delimiter">-&gt;</span> z:point [
  local-scope
  load-ingredients
  z<span class="Special"> &lt;- </span>merge a<span class="Delimiter">,</span> <span class="Constant">0</span>
]
def test a:num<span class="Delimiter">,</span> b:num <span class="Delimiter">-&gt;</span> z:point [
  local-scope
  load-ingredients
  z<span class="Special"> &lt;- </span>merge a<span class="Delimiter">,</span> b
]
$error: <span class="Constant">0</span>

<span class="Delimiter">:(scenario static_dispatch_works_with_compound_type_containing_container_defined_after_first_use)</span>
def main [
  <span class="Normal">x</span>:&amp;:foo<span class="Special"> &lt;- </span><span class="Normal">new</span> foo:type
  test x
]
container foo [
  <span class="Normal">x</span>:num
]
def test a:&amp;:foo <span class="Delimiter">-&gt;</span> z:num [
  local-scope
  load-ingredients
  <span class="Normal">z</span>:num<span class="Special"> &lt;- </span>get *a<span class="Delimiter">,</span> x:offset
]
$error: <span class="Constant">0</span>

<span class="Delimiter">:(scenario static_dispatch_works_with_compound_type_containing_container_defined_after_second_use)</span>
def main [
  <span class="Normal">x</span>:&amp;:foo<span class="Special"> &lt;- </span><span class="Normal">new</span> foo:type
  test x
]
def test a:&amp;:foo <span class="Delimiter">-&gt;</span> z:num [
  local-scope
  load-ingredients
  <span class="Normal">z</span>:num<span class="Special"> &lt;- </span>get *a<span class="Delimiter">,</span> x:offset
]
container foo [
  <span class="Normal">x</span>:num
]
$error: <span class="Constant">0</span>

<span class="Delimiter">:(scenario static_dispatch_prefers_literals_to_be_numbers_rather_than_addresses)</span>
def main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>foo <span class="Constant">0</span>
]
def foo x:&amp;:num <span class="Delimiter">-&gt;</span> y:num [
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def foo x:num <span class="Delimiter">-&gt;</span> y:num [
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
<span class="traceContains">+mem: storing 35 in location 1</span>

<span class="Delimiter">:(scenario static_dispatch_on_non_literal_character_ignores_variant_with_numbers)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  local-scope
  <span class="Normal">x</span>:<span class="Normal">char</span><span class="Special"> &lt;- </span>copy <span class="Constant">10</span>/newline
  <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>foo x
]
def foo x:num <span class="Delimiter">-&gt;</span> y:num [
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
<span class="traceContains">+error: main: ingredient 0 has the wrong type at '1:num/raw &lt;- foo x'</span>
<span class="traceAbsent">-mem: storing 34 in location 1</span>

<span class="Delimiter">:(scenario static_dispatch_dispatches_literal_to_boolean_before_character)</span>
def main [
  <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>foo <span class="Constant">0</span>  <span class="Comment"># valid literal for boolean</span>
]
def foo x:<span class="Normal">char</span> <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def foo x:<span class="Normal">bool</span> <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
<span class="Comment"># boolean variant is preferred</span>
<span class="traceContains">+mem: storing 35 in location 1</span>

<span class="Delimiter">:(scenario static_dispatch_dispatches_literal_to_character_when_out_of_boolean_range)</span>
def main [
  <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>foo <span class="Constant">97</span>  <span class="Comment"># not a valid literal for boolean</span>
]
def foo x:<span class="Normal">char</span> <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def foo x:<span class="Normal">bool</span> <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
<span class="Comment"># character variant is preferred</span>
<span class="traceContains">+mem: storing 34 in location 1</span>

<span class="Delimiter">:(scenario static_dispatch_dispatches_literal_to_number_if_at_all_possible)</span>
def main [
  <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>foo <span class="Constant">97</span>
]
def foo x:<span class="Normal">char</span> <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def foo x:num <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
<span class="Comment"># number variant is preferred</span>
<span class="traceContains">+mem: storing 35 in location 1</span>

<span class="Delimiter">:(code)</span>
string header_label<span class="Delimiter">(</span>recipe_ordinal r<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  <span class="Identifier">return</span> header_label<span class="Delimiter">(</span>get<span class="Delimiter">(</span>Recipe<span class="Delimiter">,</span> r<span class="Delimiter">));</span>
<span class="Delimiter">}</span>
string header_label<span class="Delimiter">(</span><span class="Normal">const</span> recipe&amp; caller<span class="Delimiter">)</span> <span class="Delimiter">{</span>
  ostringstream out<span class="Delimiter">;</span>
  out &lt;&lt; <span class="Constant">&quot;recipe &quot;</span> &lt;&lt; caller<span class="Delimiter">.</span>name<span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>ingredients<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
    out &lt;&lt; <span class="Constant">' '</span> &lt;&lt; to_string<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>ingredients<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Normal">if</span> <span class="Delimiter">(</span>!caller<span class="Delimiter">.</span>products<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> out &lt;&lt; <span class="Constant">&quot; -&gt;&quot;</span><span class="Delimiter">;</span>
  <span class="Normal">for</span> <span class="Delimiter">(</span><span class="Normal">int</span> i = <span class="Constant">0</span><span class="Delimiter">;</span> i &lt; SIZE<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>products<span class="Delimiter">);</span> ++i<span class="Delimiter">)</span>
    out &lt;&lt; <span class="Constant">' '</span> &lt;&lt; to_string<span class="Delimiter">(</span>caller<span class="Delimiter">.</span>products<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">));</span>
  <span class="Identifier">return</span> out<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span class="Delimiter">}</span>

<span class="Delimiter">:(scenario reload_variant_retains_other_variants)</span>
def main [
  <span class="Constant">1</span>:num<span class="Special"> &lt;- </span>copy <span class="Constant">34</span>
  <span class="Constant">2</span>:num<span class="Special"> &lt;- </span>foo <span class="Constant">1</span>:num
]
def foo x:num <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def foo x:&amp;:num <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
def! foo x:&amp;:num <span class="Delimiter">-&gt;</span> y:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">36</span>
]
<span class="traceContains">+mem: storing 34 in location 2</span>
$error: <span class="Constant">0</span>

<span class="Delimiter">:(scenario dispatch_errors_come_after_unknown_name_errors)</span>
<span class="Special">% Hide_errors = true;</span>
def main [
  <span class="Normal">y</span>:num<span class="Special"> &lt;- </span>foo x
]
def foo a:num <span class="Delimiter">-&gt;</span> b:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
def foo a:<span class="Normal">bool</span> <span class="Delimiter">-&gt;</span> b:num [
  local-scope
  load-ingredients
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
<span class="traceContains">+error: main: missing type for 'x' in 'y:num &lt;- foo x'</span>
<span class="traceContains">+error: main: failed to find a matching call for 'y:num &lt;- foo x'</span>

<span class="Delimiter">:(scenario override_methods_with_type_abbreviations)</span>
def main [
  local-scope
  <span class="Normal">s</span>:text<span class="Special"> &lt;- </span><span class="Normal">new</span> [abc]
  <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>foo s
]
def foo a:address:array:character <span class="Delimiter">-&gt;</span> result:number [
  <span class="Identifier">return</span> <span class="Constant">34</span>
]
<span class="Comment"># identical to previous variant once you take type abbreviations into account</span>
def! foo a:text <span class="Delimiter">-&gt;</span> result:num [
  <span class="Identifier">return</span> <span class="Constant">35</span>
]
<span class="traceContains">+mem: storing 35 in location 1</span>

<span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span class="Normal">using</span> std::abs<span class="Delimiter">;</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->