html/linux/bootstrap/003trace.cc.html


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

<!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 - linux/bootstrap/003trace.cc</title>
<meta name="Generator" content="Vim/8.1">
<meta name="plugin-version" content="vim8.1_v1">
<meta name="syntax" content="cpp">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #eeeeee; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #eeeeee; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.PreProc { color: #c000c0; }
.Normal { color: #000000; background-color: #eeeeee; padding-bottom: 1px; }
.LineNr { }
.cSpecial { color: #008000; }
.Constant { color: #008787; }
.Comment { color: #005faf; }
.Delimiter { color: #c000c0; }
.Identifier { color: #af5f00; }
-->
</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;
  }
  var 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();'>
<a href='https://github.com/akkartik/mu/blob/main/linux/bootstrap/003trace.cc'>https://github.com/akkartik/mu/blob/main/linux/bootstrap/003trace.cc</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr">  1 </span><span class="Comment">//: The goal of layers is to make programs more easy to understand and more</span>
<span id="L2" class="LineNr">  2 </span><span class="Comment">//: malleable, easy to rewrite in radical ways without accidentally breaking</span>
<span id="L3" class="LineNr">  3 </span><span class="Comment">//: some corner case. Tests further both goals. They help understandability by</span>
<span id="L4" class="LineNr">  4 </span><span class="Comment">//: letting one make small changes and get feedback. What if I wrote this line</span>
<span id="L5" class="LineNr">  5 </span><span class="Comment">//: like so? What if I removed this function call, is it really necessary?</span>
<span id="L6" class="LineNr">  6 </span><span class="Comment">//: Just try it, see if the tests pass. Want to explore rewriting this bit in</span>
<span id="L7" class="LineNr">  7 </span><span class="Comment">//: this way? Tests put many refactorings on a firmer footing.</span>
<span id="L8" class="LineNr">  8 </span><span class="Comment">//:</span>
<span id="L9" class="LineNr">  9 </span><span class="Comment">//: But the usual way we write tests seems incomplete. Refactorings tend to</span>
<span id="L10" class="LineNr"> 10 </span><span class="Comment">//: work in the small, but don't help with changes to function boundaries. If</span>
<span id="L11" class="LineNr"> 11 </span><span class="Comment">//: you want to extract a new function you have to manually test-drive it to</span>
<span id="L12" class="LineNr"> 12 </span><span class="Comment">//: create tests for it. If you want to inline a function its tests are no</span>
<span id="L13" class="LineNr"> 13 </span><span class="Comment">//: longer valid. In both cases you end up having to reorganize code as well as</span>
<span id="L14" class="LineNr"> 14 </span><span class="Comment">//: tests, an error-prone activity.</span>
<span id="L15" class="LineNr"> 15 </span><span class="Comment">//:</span>
<span id="L16" class="LineNr"> 16 </span><span class="Comment">//: In response, this layer introduces the notion of domain-driven *white-box*</span>
<span id="L17" class="LineNr"> 17 </span><span class="Comment">//: testing. We focus on the domain of inputs the whole program needs to</span>
<span id="L18" class="LineNr"> 18 </span><span class="Comment">//: handle rather than the correctness of individual functions. All white-box</span>
<span id="L19" class="LineNr"> 19 </span><span class="Comment">//: tests invoke the program in a single way: by calling run() with some</span>
<span id="L20" class="LineNr"> 20 </span><span class="Comment">//: input. As the program operates on the input, it traces out a list of</span>
<span id="L21" class="LineNr"> 21 </span><span class="Comment">//: _facts_ deduced about the domain:</span>
<span id="L22" class="LineNr"> 22 </span><span class="Comment">//:   trace(&quot;label&quot;) &lt;&lt; &quot;fact 1: &quot; &lt;&lt; val;</span>
<span id="L23" class="LineNr"> 23 </span><span class="Comment">//:</span>
<span id="L24" class="LineNr"> 24 </span><span class="Comment">//: Tests can now check for these facts in the trace:</span>
<span id="L25" class="LineNr"> 25 </span><span class="Comment">//:   CHECK_TRACE_CONTENTS(&quot;label&quot;, &quot;fact 1: 34\n&quot;</span>
<span id="L26" class="LineNr"> 26 </span><span class="Comment">//:                                 &quot;fact 2: 35\n&quot;);</span>
<span id="L27" class="LineNr"> 27 </span><span class="Comment">//:</span>
<span id="L28" class="LineNr"> 28 </span><span class="Comment">//: Since we never call anything but the run() function directly, we never have</span>
<span id="L29" class="LineNr"> 29 </span><span class="Comment">//: to rewrite the tests when we reorganize the internals of the program. We</span>
<span id="L30" class="LineNr"> 30 </span><span class="Comment">//: just have to make sure our rewrite deduces the same facts about the domain,</span>
<span id="L31" class="LineNr"> 31 </span><span class="Comment">//: and that's something we're going to have to do anyway.</span>
<span id="L32" class="LineNr"> 32 </span><span class="Comment">//:</span>
<span id="L33" class="LineNr"> 33 </span><span class="Comment">//: To avoid the combinatorial explosion of integration tests, each layer</span>
<span id="L34" class="LineNr"> 34 </span><span class="Comment">//: mainly logs facts to the trace with a common *label*. All tests in a layer</span>
<span id="L35" class="LineNr"> 35 </span><span class="Comment">//: tend to check facts with this label. Validating the facts logged with a</span>
<span id="L36" class="LineNr"> 36 </span><span class="Comment">//: specific label is like calling functions of that layer directly.</span>
<span id="L37" class="LineNr"> 37 </span><span class="Comment">//:</span>
<span id="L38" class="LineNr"> 38 </span><span class="Comment">//: To build robust tests, trace facts about your domain rather than details of</span>
<span id="L39" class="LineNr"> 39 </span><span class="Comment">//: how you computed them.</span>
<span id="L40" class="LineNr"> 40 </span><span class="Comment">//:</span>
<span id="L41" class="LineNr"> 41 </span><span class="Comment">//: More details: <a href="http://akkartik.name/blog/tracing-tests">http://akkartik.name/blog/tracing-tests</a></span>
<span id="L42" class="LineNr"> 42 </span><span class="Comment">//:</span>
<span id="L43" class="LineNr"> 43 </span><span class="Comment">//: ---</span>
<span id="L44" class="LineNr"> 44 </span><span class="Comment">//:</span>
<span id="L45" class="LineNr"> 45 </span><span class="Comment">//: Between layers and domain-driven testing, programming starts to look like a</span>
<span id="L46" class="LineNr"> 46 </span><span class="Comment">//: fundamentally different activity. Instead of focusing on a) superficial,</span>
<span id="L47" class="LineNr"> 47 </span><span class="Comment">//: b) local rules on c) code [like say <a href="http://blog.bbv.ch/2013/06/05/clean-code-cheat-sheet],">http://blog.bbv.ch/2013/06/05/clean-code-cheat-sheet],</a></span>
<span id="L48" class="LineNr"> 48 </span><span class="Comment">//: we allow programmers to engage with the a) deep, b) global structure of</span>
<span id="L49" class="LineNr"> 49 </span><span class="Comment">//: the c) domain. If you can systematically track discontinuities in the</span>
<span id="L50" class="LineNr"> 50 </span><span class="Comment">//: domain, you don't care if the code used gotos as long as it passed all</span>
<span id="L51" class="LineNr"> 51 </span><span class="Comment">//: tests. If tests become more robust to run, it becomes easier to try out</span>
<span id="L52" class="LineNr"> 52 </span><span class="Comment">//: radically different implementations for the same program. If code is</span>
<span id="L53" class="LineNr"> 53 </span><span class="Comment">//: super-easy to rewrite, it becomes less important what indentation style it</span>
<span id="L54" class="LineNr"> 54 </span><span class="Comment">//: uses, or that the objects are appropriately encapsulated, or that the</span>
<span id="L55" class="LineNr"> 55 </span><span class="Comment">//: functions are referentially transparent.</span>
<span id="L56" class="LineNr"> 56 </span><span class="Comment">//:</span>
<span id="L57" class="LineNr"> 57 </span><span class="Comment">//: Instead of plumbing, programming becomes building and gradually refining a</span>
<span id="L58" class="LineNr"> 58 </span><span class="Comment">//: map of the environment the program must operate under. Whether a program</span>
<span id="L59" class="LineNr"> 59 </span><span class="Comment">//: is 'correct' at a given point in time is a red herring; what matters is</span>
<span id="L60" class="LineNr"> 60 </span><span class="Comment">//: avoiding regression by monotonically nailing down the more 'eventful'</span>
<span id="L61" class="LineNr"> 61 </span><span class="Comment">//: parts of the terrain. It helps readers new and old, and rewards curiosity,</span>
<span id="L62" class="LineNr"> 62 </span><span class="Comment">//: to organize large programs in self-similar hierarchies of example tests</span>
<span id="L63" class="LineNr"> 63 </span><span class="Comment">//: colocated with the code that makes them work.</span>
<span id="L64" class="LineNr"> 64 </span><span class="Comment">//:</span>
<span id="L65" class="LineNr"> 65 </span><span class="Comment">//:   &quot;Programming properly should be regarded as an activity by which</span>
<span id="L66" class="LineNr"> 66 </span><span class="Comment">//:   programmers form a mental model, rather than as production of a program.&quot;</span>
<span id="L67" class="LineNr"> 67 </span><span class="Comment">//:   -- Peter Naur (<a href="http://akkartik.name/naur.pdf)">http://akkartik.name/naur.pdf)</a></span>
<span id="L68" class="LineNr"> 68 </span>
<span id="L69" class="LineNr"> 69 </span><span class="Comment">//:: == Core data structures</span>
<span id="L70" class="LineNr"> 70 </span>
<span id="L71" class="LineNr"> 71 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L72" class="LineNr"> 72 </span>trace_stream* <a href='003trace.cc.html#L72'>Trace_stream</a> = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L73" class="LineNr"> 73 </span>
<span id="L74" class="LineNr"> 74 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L75" class="LineNr"> 75 </span><span class="Normal">struct</span> trace_stream <span class="Delimiter">{</span>
<span id="L76" class="LineNr"> 76 </span>  vector&lt;trace_line&gt; <a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">;</span>
<span id="L77" class="LineNr"> 77 </span>  <span class="Comment">// End trace_stream Fields</span>
<span id="L78" class="LineNr"> 78 </span>
<span id="L79" class="LineNr"> 79 </span>  trace_stream<span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L80" class="LineNr"> 80 </span>    <span class="Comment">// End trace_stream Constructor</span>
<span id="L81" class="LineNr"> 81 </span>  <span class="Delimiter">}</span>
<span id="L82" class="LineNr"> 82 </span>  <a href='003trace.cc.html#L82'>~trace_stream</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L83" class="LineNr"> 83 </span>    <span class="Comment">// End trace_stream Destructor</span>
<span id="L84" class="LineNr"> 84 </span>  <span class="Delimiter">}</span>
<span id="L85" class="LineNr"> 85 </span>  <span class="Comment">// End trace_stream Methods</span>
<span id="L86" class="LineNr"> 86 </span><span class="Delimiter">};</span>
<span id="L87" class="LineNr"> 87 </span>
<span id="L88" class="LineNr"> 88 </span><span class="Comment">//:: == Adding to the trace</span>
<span id="L89" class="LineNr"> 89 </span>
<span id="L90" class="LineNr"> 90 </span><span class="Comment">//: Top-level method is trace() which can be used like an ostream. Usage:</span>
<span id="L91" class="LineNr"> 91 </span><span class="Comment">//:   trace(depth, label) &lt;&lt; ... &lt;&lt; end();</span>
<span id="L92" class="LineNr"> 92 </span><span class="Comment">//: Don't forget the 'end()' to actually append to the trace.</span>
<span id="L93" class="LineNr"> 93 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L94" class="LineNr"> 94 </span><span class="Comment">// No brackets around the expansion so that it prints nothing if Trace_stream</span>
<span id="L95" class="LineNr"> 95 </span><span class="Comment">// isn't initialized.</span>
<span id="L96" class="LineNr"> 96 </span><span class="PreProc">#define trace(</span><span class="Delimiter">...</span><span class="PreProc">)  !Trace_stream ? cerr : Trace_stream</span><span class="Delimiter">-&gt;</span><span class="PreProc">stream(</span><span class="Constant">__VA_ARGS__</span><span class="PreProc">)</span>
<span id="L97" class="LineNr"> 97 </span>
<span id="L98" class="LineNr"> 98 </span><span class="Delimiter">:(before &quot;End trace_stream Fields&quot;)</span>
<span id="L99" class="LineNr"> 99 </span><span class="Comment">// accumulator for current trace_line</span>
<span id="L100" class="LineNr">100 </span>ostringstream* curr_stream<span class="Delimiter">;</span>
<span id="L101" class="LineNr">101 </span>string <a href='003trace.cc.html#L101'>curr_label</a><span class="Delimiter">;</span>
<span id="L102" class="LineNr">102 </span><span class="Normal">int</span> <a href='003trace.cc.html#L102'>curr_depth</a><span class="Delimiter">;</span>
<span id="L103" class="LineNr">103 </span><span class="Comment">// other stuff</span>
<span id="L104" class="LineNr">104 </span><span class="Normal">int</span> <a href='003trace.cc.html#L104'>collect_depth</a><span class="Delimiter">;</span>  <span class="Comment">// avoid tracing lower levels for speed</span>
<span id="L105" class="LineNr">105 </span>ofstream <a href='003trace.cc.html#L105'>null_stream</a><span class="Delimiter">;</span>  <span class="Comment">// never opened, so writes to it silently fail</span>
<span id="L106" class="LineNr">106 </span>
<span id="L107" class="LineNr">107 </span><span class="Comment">//: Some constants.</span>
<span id="L108" class="LineNr">108 </span><span class="Delimiter">:(before &quot;struct trace_stream&quot;)</span>  <span class="Comment">// include constants in all cleaved compilation units</span>
<span id="L109" class="LineNr">109 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='003trace.cc.html#L109'>Max_depth</a> = <span class="Constant">9999</span><span class="Delimiter">;</span>
<span id="L110" class="LineNr">110 </span><span class="Delimiter">:(before &quot;End trace_stream Constructor&quot;)</span>
<span id="L111" class="LineNr">111 </span>curr_stream = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L112" class="LineNr">112 </span><a href='003trace.cc.html#L102'>curr_depth</a> = <a href='003trace.cc.html#L109'>Max_depth</a><span class="Delimiter">;</span>
<span id="L113" class="LineNr">113 </span><a href='003trace.cc.html#L104'>collect_depth</a> = <a href='003trace.cc.html#L109'>Max_depth</a><span class="Delimiter">;</span>
<span id="L114" class="LineNr">114 </span>
<span id="L115" class="LineNr">115 </span><span class="Delimiter">:(before &quot;struct trace_stream&quot;)</span>
<span id="L116" class="LineNr">116 </span><span class="Normal">struct</span> trace_line <span class="Delimiter">{</span>
<span id="L117" class="LineNr">117 </span>  string <a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">;</span>
<span id="L118" class="LineNr">118 </span>  string label<span class="Delimiter">;</span>
<span id="L119" class="LineNr">119 </span>  <span class="Normal">int</span> <a href='003trace.cc.html#L119'>depth</a><span class="Delimiter">;</span>  <span class="Comment">// 0 is 'sea level'; positive integers are progressively 'deeper' and lower level</span>
<span id="L120" class="LineNr">120 </span>  trace_line<span class="Delimiter">(</span>string c<span class="Delimiter">,</span> string l<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L121" class="LineNr">121 </span>    <a href='003trace.cc.html#L117'>contents</a> = c<span class="Delimiter">;</span>
<span id="L122" class="LineNr">122 </span>    label = l<span class="Delimiter">;</span>
<span id="L123" class="LineNr">123 </span>    <a href='003trace.cc.html#L119'>depth</a> = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L124" class="LineNr">124 </span>  <span class="Delimiter">}</span>
<span id="L125" class="LineNr">125 </span>  trace_line<span class="Delimiter">(</span>string c<span class="Delimiter">,</span> string l<span class="Delimiter">,</span> <span class="Normal">int</span> d<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L126" class="LineNr">126 </span>    <a href='003trace.cc.html#L117'>contents</a> = c<span class="Delimiter">;</span>
<span id="L127" class="LineNr">127 </span>    label = l<span class="Delimiter">;</span>
<span id="L128" class="LineNr">128 </span>    <a href='003trace.cc.html#L119'>depth</a> = d<span class="Delimiter">;</span>
<span id="L129" class="LineNr">129 </span>  <span class="Delimiter">}</span>
<span id="L130" class="LineNr">130 </span><span class="Delimiter">};</span>
<span id="L131" class="LineNr">131 </span>
<span id="L132" class="LineNr">132 </span>string <a href='003trace.cc.html#L132'>unescape_newline</a><span class="Delimiter">(</span>string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L133" class="LineNr">133 </span>  std::stringstream ss<span class="Delimiter">;</span>
<span id="L134" class="LineNr">134 </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; <a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>s<span class="Delimiter">);</span>  ++i<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L135" class="LineNr">135 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>s<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">)</span> == <span class="cSpecial">'\n'</span><span class="Delimiter">)</span>
<span id="L136" class="LineNr">136 </span>      ss &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\\</span><span class="Constant">n&quot;</span><span class="Delimiter">;</span>
<span id="L137" class="LineNr">137 </span>    <span class="Normal">else</span>
<span id="L138" class="LineNr">138 </span>      ss &lt;&lt; s<span class="Delimiter">.</span>at<span class="Delimiter">(</span>i<span class="Delimiter">);</span>
<span id="L139" class="LineNr">139 </span>  <span class="Delimiter">}</span>
<span id="L140" class="LineNr">140 </span>  <span class="Identifier">return</span> ss<span class="Delimiter">.</span>str<span class="Delimiter">();</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 class="Normal">void</span> <a href='003trace.cc.html#L143'>dump_trace_line</a><span class="Delimiter">(</span>ostream&amp; s<span class="Delimiter">,</span> trace_line&amp; t<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L144" class="LineNr">144 </span>  s &lt;&lt; std::setw<span class="Delimiter">(</span><span class="Constant">2</span><span class="Delimiter">)</span> &lt;&lt; t<span class="Delimiter">.</span><a href='003trace.cc.html#L119'>depth</a> &lt;&lt; <span class="Constant">' '</span> &lt;&lt; t<span class="Delimiter">.</span>label &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; <a href='003trace.cc.html#L132'>unescape_newline</a><span class="Delimiter">(</span>t<span class="Delimiter">.</span><a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">)</span> &lt;&lt; <span class="cSpecial">'\n'</span><span class="Delimiter">;</span>
<span id="L145" class="LineNr">145 </span><span class="Delimiter">}</span>
<span id="L146" class="LineNr">146 </span>
<span id="L147" class="LineNr">147 </span><span class="Comment">//: Starting a new trace line.</span>
<span id="L148" class="LineNr">148 </span><span class="Delimiter">:(before &quot;End trace_stream Methods&quot;)</span>
<span id="L149" class="LineNr">149 </span>ostream&amp; stream<span class="Delimiter">(</span>string label<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L150" class="LineNr">150 </span>  <span class="Identifier">return</span> stream<span class="Delimiter">(</span><a href='003trace.cc.html#L109'>Max_depth</a><span class="Delimiter">,</span> label<span class="Delimiter">);</span>
<span id="L151" class="LineNr">151 </span><span class="Delimiter">}</span>
<span id="L152" class="LineNr">152 </span>
<span id="L153" class="LineNr">153 </span>ostream&amp; stream<span class="Delimiter">(</span><span class="Normal">int</span> <a href='003trace.cc.html#L119'>depth</a><span class="Delimiter">,</span> string label<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L154" class="LineNr">154 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L119'>depth</a> &gt; <a href='003trace.cc.html#L104'>collect_depth</a><span class="Delimiter">)</span> <span class="Identifier">return</span> <a href='003trace.cc.html#L105'>null_stream</a><span class="Delimiter">;</span>
<span id="L155" class="LineNr">155 </span>  curr_stream = <span class="Normal">new</span> ostringstream<span class="Delimiter">;</span>
<span id="L156" class="LineNr">156 </span>  <a href='003trace.cc.html#L101'>curr_label</a> = label<span class="Delimiter">;</span>
<span id="L157" class="LineNr">157 </span>  <a href='003trace.cc.html#L102'>curr_depth</a> = <a href='003trace.cc.html#L119'>depth</a><span class="Delimiter">;</span>
<span id="L158" class="LineNr">158 </span>  <span class="Delimiter">(</span>*curr_stream<span class="Delimiter">)</span> &lt;&lt; std::hex<span class="Delimiter">;</span>  <span class="Comment">// printing addresses is the common case</span>
<span id="L159" class="LineNr">159 </span>  <span class="Identifier">return</span> *curr_stream<span class="Delimiter">;</span>
<span id="L160" class="LineNr">160 </span><span class="Delimiter">}</span>
<span id="L161" class="LineNr">161 </span>
<span id="L162" class="LineNr">162 </span><span class="Comment">//: End of a trace line; append it to the trace.</span>
<span id="L163" class="LineNr">163 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L164" class="LineNr">164 </span><span class="Normal">struct</span> end <span class="Delimiter">{};</span>
<span id="L165" class="LineNr">165 </span><span class="Delimiter">:(code)</span>
<span id="L166" class="LineNr">166 </span>ostream&amp; <span class="Normal">operator</span>&lt;&lt;<span class="Delimiter">(</span>ostream&amp; os<span class="Delimiter">,</span> end <span class="Comment">/*</span><span class="Comment">unused</span><span class="Comment">*/</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L167" class="LineNr">167 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">)</span> <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L183'>newline</a><span class="Delimiter">();</span>
<span id="L168" class="LineNr">168 </span>  <span class="Identifier">return</span> os<span class="Delimiter">;</span>
<span id="L169" class="LineNr">169 </span><span class="Delimiter">}</span>
<span id="L170" class="LineNr">170 </span>
<span id="L171" class="LineNr">171 </span><span class="Comment">//: Fatal error.</span>
<span id="L172" class="LineNr">172 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L173" class="LineNr">173 </span><span class="Normal">struct</span> <a href='003trace.cc.html#L173'>die</a> <span class="Delimiter">{};</span>
<span id="L174" class="LineNr">174 </span><span class="Delimiter">:(code)</span>
<span id="L175" class="LineNr">175 </span>ostream&amp; <span class="Normal">operator</span>&lt;&lt;<span class="Delimiter">(</span>ostream&amp; <span class="Comment">/*</span><span class="Comment">unused</span><span class="Comment">*/</span><span class="Delimiter">,</span> <a href='003trace.cc.html#L173'>die</a> <span class="Comment">/*</span><span class="Comment">unused</span><span class="Comment">*/</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L176" class="LineNr">176 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">)</span> <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L183'>newline</a><span class="Delimiter">();</span>
<span id="L177" class="LineNr">177 </span>  exit<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">);</span>
<span id="L178" class="LineNr">178 </span><span class="Delimiter">}</span>
<span id="L179" class="LineNr">179 </span>
<span id="L180" class="LineNr">180 </span><span class="Delimiter">:(before &quot;End trace_stream Methods&quot;)</span>
<span id="L181" class="LineNr">181 </span><span class="Normal">void</span> <a href='003trace.cc.html#L183'>newline</a><span class="Delimiter">();</span>
<span id="L182" class="LineNr">182 </span><span class="Delimiter">:(code)</span>
<span id="L183" class="LineNr">183 </span><span class="Normal">void</span> trace_stream::<a href='003trace.cc.html#L183'>newline</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L184" class="LineNr">184 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!curr_stream<span class="Delimiter">)</span> <span class="Identifier">return</span><span class="Delimiter">;</span>
<span id="L185" class="LineNr">185 </span>  string curr_contents = curr_stream<span class="Delimiter">-&gt;</span>str<span class="Delimiter">();</span>
<span id="L186" class="LineNr">186 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!curr_contents<span class="Delimiter">.</span>empty<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L187" class="LineNr">187 </span>    <a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>trace_line<span class="Delimiter">(</span>curr_contents<span class="Delimiter">,</span> <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span><a href='003trace.cc.html#L101'>curr_label</a><span class="Delimiter">),</span> <a href='003trace.cc.html#L102'>curr_depth</a><span class="Delimiter">));</span>  <span class="Comment">// preserve indent in contents</span>
<span id="L188" class="LineNr">188 </span>    <span class="Comment">// maybe print this line to stderr</span>
<span id="L189" class="LineNr">189 </span>    trace_line&amp; t = <a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>back<span class="Delimiter">();</span>
<span id="L190" class="LineNr">190 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L243'>should_incrementally_print_trace</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L191" class="LineNr">191 </span>      <a href='003trace.cc.html#L143'>dump_trace_line</a><span class="Delimiter">(</span>cerr<span class="Delimiter">,</span> t<span class="Delimiter">);</span>
<span id="L192" class="LineNr">192 </span>    <span class="Delimiter">}</span>
<span id="L193" class="LineNr">193 </span>    <span class="Comment">// End trace Commit</span>
<span id="L194" class="LineNr">194 </span>  <span class="Delimiter">}</span>
<span id="L195" class="LineNr">195 </span>
<span id="L196" class="LineNr">196 </span>  <span class="Comment">// clean up</span>
<span id="L197" class="LineNr">197 </span>  <span class="Normal">delete</span> curr_stream<span class="Delimiter">;</span>
<span id="L198" class="LineNr">198 </span>  curr_stream = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L199" class="LineNr">199 </span>  <a href='003trace.cc.html#L101'>curr_label</a><span class="Delimiter">.</span>clear<span class="Delimiter">();</span>
<span id="L200" class="LineNr">200 </span>  <a href='003trace.cc.html#L102'>curr_depth</a> = <a href='003trace.cc.html#L109'>Max_depth</a><span class="Delimiter">;</span>
<span id="L201" class="LineNr">201 </span><span class="Delimiter">}</span>
<span id="L202" class="LineNr">202 </span>
<span id="L203" class="LineNr">203 </span><span class="Comment">//:: == Initializing the trace in tests</span>
<span id="L204" class="LineNr">204 </span>
<span id="L205" class="LineNr">205 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L206" class="LineNr">206 </span><span class="PreProc">#define START_TRACING_UNTIL_END_OF_SCOPE  lease_tracer leased_tracer</span><span class="Delimiter">;</span>
<span id="L207" class="LineNr">207 </span><span class="Delimiter">:(before &quot;End Test Setup&quot;)</span>
<span id="L208" class="LineNr">208 </span><a href='003trace.cc.html#L206'>START_TRACING_UNTIL_END_OF_SCOPE</a>
<span id="L209" class="LineNr">209 </span>
<span id="L210" class="LineNr">210 </span><span class="Comment">//: Trace_stream is a resource, lease_tracer uses RAII to manage it.</span>
<span id="L211" class="LineNr">211 </span><span class="Delimiter">:(before &quot;End Types&quot;)</span>
<span id="L212" class="LineNr">212 </span><span class="Normal">struct</span> lease_tracer <span class="Delimiter">{</span>
<span id="L213" class="LineNr">213 </span>  lease_tracer<span class="Delimiter">();</span>
<span id="L214" class="LineNr">214 </span>  <a href='003trace.cc.html#L218'>~lease_tracer</a><span class="Delimiter">();</span>
<span id="L215" class="LineNr">215 </span><span class="Delimiter">};</span>
<span id="L216" class="LineNr">216 </span><span class="Delimiter">:(code)</span>
<span id="L217" class="LineNr">217 </span>lease_tracer::lease_tracer<span class="Delimiter">()</span> <span class="Delimiter">{</span> <a href='003trace.cc.html#L72'>Trace_stream</a> = <span class="Normal">new</span> trace_stream<span class="Delimiter">;</span> <span class="Delimiter">}</span>
<span id="L218" class="LineNr">218 </span>lease_tracer::<a href='003trace.cc.html#L218'>~lease_tracer</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L219" class="LineNr">219 </span>  <span class="Normal">delete</span> <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">;</span>
<span id="L220" class="LineNr">220 </span>  <a href='003trace.cc.html#L72'>Trace_stream</a> = <span class="Constant">NULL</span><span class="Delimiter">;</span>
<span id="L221" class="LineNr">221 </span><span class="Delimiter">}</span>
<span id="L222" class="LineNr">222 </span>
<span id="L223" class="LineNr">223 </span><span class="Comment">//:: == Errors and warnings using traces</span>
<span id="L224" class="LineNr">224 </span>
<span id="L225" class="LineNr">225 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L226" class="LineNr">226 </span><span class="PreProc">#define raise  (!Trace_stream ? (++Trace_errors</span><span class="Delimiter">,</span><span class="PreProc">cerr) </span><span class="Comment">/*</span><span class="Comment">do print</span><span class="Comment">*/</span><span class="PreProc"> : Trace_stream</span><span class="Delimiter">-&gt;</span><span class="PreProc">stream(Error_depth</span><span class="Delimiter">,</span><span class="PreProc"> </span><span class="Constant">&quot;error&quot;</span><span class="PreProc">))</span>
<span id="L227" class="LineNr">227 </span><span class="PreProc">#define warn (!Trace_stream ? (++Trace_errors</span><span class="Delimiter">,</span><span class="PreProc">cerr) </span><span class="Comment">/*</span><span class="Comment">do print</span><span class="Comment">*/</span><span class="PreProc"> : Trace_stream</span><span class="Delimiter">-&gt;</span><span class="PreProc">stream(Warn_depth</span><span class="Delimiter">,</span><span class="PreProc"> </span><span class="Constant">&quot;warn&quot;</span><span class="PreProc">))</span>
<span id="L228" class="LineNr">228 </span>
<span id="L229" class="LineNr">229 </span><span class="Comment">//: Print errors and warnings to the screen by default.</span>
<span id="L230" class="LineNr">230 </span><span class="Delimiter">:(before &quot;struct trace_stream&quot;)</span>  <span class="Comment">// include constants in all cleaved compilation units</span>
<span id="L231" class="LineNr">231 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='003trace.cc.html#L231'>Error_depth</a> = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L232" class="LineNr">232 </span><span class="Normal">const</span> <span class="Normal">int</span> <a href='003trace.cc.html#L232'>Warn_depth</a> = <span class="Constant">1</span><span class="Delimiter">;</span>
<span id="L233" class="LineNr">233 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L234" class="LineNr">234 </span><span class="Normal">int</span> Hide_errors = <span class="Constant">false</span><span class="Delimiter">;</span>  <span class="Comment">// if set, don't print errors or warnings to screen</span>
<span id="L235" class="LineNr">235 </span><span class="Normal">int</span> Hide_warnings = <span class="Constant">false</span><span class="Delimiter">;</span>  <span class="Comment">// if set, don't print warnings to screen</span>
<span id="L236" class="LineNr">236 </span><span class="Delimiter">:(before &quot;End Reset&quot;)</span>
<span id="L237" class="LineNr">237 </span>Hide_errors = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L238" class="LineNr">238 </span>Hide_warnings = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L239" class="LineNr">239 </span><span class="Comment">//: Never dump warnings in tests</span>
<span id="L240" class="LineNr">240 </span><span class="Delimiter">:(before &quot;End Test Setup&quot;)</span>
<span id="L241" class="LineNr">241 </span>Hide_warnings = <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L242" class="LineNr">242 </span><span class="Delimiter">:(code)</span>
<span id="L243" class="LineNr">243 </span><span class="Normal">bool</span> trace_stream::<a href='003trace.cc.html#L243'>should_incrementally_print_trace</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L244" class="LineNr">244 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Hide_errors &amp;&amp; <a href='003trace.cc.html#L102'>curr_depth</a> == <a href='003trace.cc.html#L231'>Error_depth</a><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L245" class="LineNr">245 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Hide_warnings &amp;&amp; !Hide_errors &amp;&amp; <a href='003trace.cc.html#L102'>curr_depth</a> == <a href='003trace.cc.html#L232'>Warn_depth</a><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L246" class="LineNr">246 </span>  <span class="Comment">// End Incremental Trace Print Conditions</span>
<span id="L247" class="LineNr">247 </span>  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L248" class="LineNr">248 </span><span class="Delimiter">}</span>
<span id="L249" class="LineNr">249 </span><span class="Delimiter">:(before &quot;End trace_stream Methods&quot;)</span>
<span id="L250" class="LineNr">250 </span><span class="Normal">bool</span> <a href='003trace.cc.html#L243'>should_incrementally_print_trace</a><span class="Delimiter">();</span>
<span id="L251" class="LineNr">251 </span>
<span id="L252" class="LineNr">252 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L253" class="LineNr">253 </span><span class="Normal">int</span> <a href='003trace.cc.html#L253'>Trace_errors</a> = <span class="Constant">0</span><span class="Delimiter">;</span>  <span class="Comment">// used only when Trace_stream is NULL</span>
<span id="L254" class="LineNr">254 </span>
<span id="L255" class="LineNr">255 </span><span class="Comment">// Fail tests that displayed (unexpected) errors.</span>
<span id="L256" class="LineNr">256 </span><span class="Comment">// Expected errors should always be hidden and silently checked for.</span>
<span id="L257" class="LineNr">257 </span><span class="Delimiter">:(before &quot;End Test Teardown&quot;)</span>
<span id="L258" class="LineNr">258 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='002test.cc.html#L21'>Passed</a> &amp;&amp; !Hide_errors &amp;&amp; <a href='003trace.cc.html#L262'>trace_contains_errors</a><span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L259" class="LineNr">259 </span>  <a href='002test.cc.html#L21'>Passed</a> = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L260" class="LineNr">260 </span><span class="Delimiter">}</span>
<span id="L261" class="LineNr">261 </span><span class="Delimiter">:(code)</span>
<span id="L262" class="LineNr">262 </span><span class="Normal">bool</span> <a href='003trace.cc.html#L262'>trace_contains_errors</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L263" class="LineNr">263 </span>  <span class="Identifier">return</span> <a href='003trace.cc.html#L253'>Trace_errors</a> &gt; <span class="Constant">0</span> || trace_count<span class="Delimiter">(</span><span class="Constant">&quot;error&quot;</span><span class="Delimiter">)</span> &gt; <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L264" class="LineNr">264 </span><span class="Delimiter">}</span>
<span id="L265" class="LineNr">265 </span>
<span id="L266" class="LineNr">266 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L267" class="LineNr">267 </span><span class="Comment">// If we aren't yet sure how to deal with some corner case, use assert_for_now</span>
<span id="L268" class="LineNr">268 </span><span class="Comment">// to indicate that it isn't an inviolable invariant.</span>
<span id="L269" class="LineNr">269 </span><span class="PreProc">#define assert_for_now assert</span>
<span id="L270" class="LineNr">270 </span><span class="PreProc">#define raise_for_now raise</span>
<span id="L271" class="LineNr">271 </span>
<span id="L272" class="LineNr">272 </span><span class="Comment">//:: == Other assertions on traces</span>
<span id="L273" class="LineNr">273 </span><span class="Comment">//: Primitives:</span>
<span id="L274" class="LineNr">274 </span><span class="Comment">//:   - CHECK_TRACE_CONTENTS(lines)</span>
<span id="L275" class="LineNr">275 </span><span class="Comment">//:     Assert that the trace contains the given lines (separated by newlines)</span>
<span id="L276" class="LineNr">276 </span><span class="Comment">//:     in order. There can be other intervening lines between them.</span>
<span id="L277" class="LineNr">277 </span><span class="Comment">//:   - CHECK_TRACE_DOESNT_CONTAIN(line)</span>
<span id="L278" class="LineNr">278 </span><span class="Comment">//:   - CHECK_TRACE_DOESNT_CONTAIN(label, contents)</span>
<span id="L279" class="LineNr">279 </span><span class="Comment">//:     Assert that the trace doesn't contain the given (single) line.</span>
<span id="L280" class="LineNr">280 </span><span class="Comment">//:   - CHECK_TRACE_COUNT(label, count)</span>
<span id="L281" class="LineNr">281 </span><span class="Comment">//:     Assert that the trace contains exactly 'count' lines with the given</span>
<span id="L282" class="LineNr">282 </span><span class="Comment">//:     'label'.</span>
<span id="L283" class="LineNr">283 </span><span class="Comment">//:   - CHECK_TRACE_CONTAINS_ERRORS()</span>
<span id="L284" class="LineNr">284 </span><span class="Comment">//:   - CHECK_TRACE_DOESNT_CONTAIN_ERRORS()</span>
<span id="L285" class="LineNr">285 </span><span class="Comment">//:   - trace_count_prefix(label, prefix)</span>
<span id="L286" class="LineNr">286 </span><span class="Comment">//:     Count the number of trace lines with the given 'label' that start with</span>
<span id="L287" class="LineNr">287 </span><span class="Comment">//:     the given 'prefix'.</span>
<span id="L288" class="LineNr">288 </span>
<span id="L289" class="LineNr">289 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L290" class="LineNr">290 </span><span class="PreProc">#define CHECK_TRACE_CONTENTS(</span><span class="Delimiter">...</span><span class="PreProc">)  check_trace_contents(__FUNCTION__</span><span class="Delimiter">,</span><span class="PreProc"> </span><span class="Constant">__FILE__</span><span class="Delimiter">,</span><span class="PreProc"> </span><span class="Constant">__LINE__</span><span class="Delimiter">,</span><span class="PreProc"> </span><span class="Constant">__VA_ARGS__</span><span class="PreProc">)</span>
<span id="L291" class="LineNr">291 </span>
<span id="L292" class="LineNr">292 </span><span class="PreProc">#define CHECK_TRACE_DOESNT_CONTAIN(</span><span class="Delimiter">...</span><span class="PreProc">)  CHECK(trace_doesnt_contain(</span><span class="Constant">__VA_ARGS__</span><span class="PreProc">))</span>
<span id="L293" class="LineNr">293 </span>
<span id="L294" class="LineNr">294 </span><span class="PreProc">#define CHECK_TRACE_COUNT(label</span><span class="Delimiter">,</span><span class="PreProc"> count) \</span>
<span id="L295" class="LineNr">295 </span><span class="PreProc">  </span><span class="Normal">if</span><span class="PreProc"> (<a href='002test.cc.html#L21'>Passed</a> &amp;&amp; trace_count(label) != (count)) </span><span class="Delimiter">{</span><span class="PreProc"> \</span>
<span id="L296" class="LineNr">296 </span><span class="PreProc">    cerr &lt;&lt; </span><span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">F - &quot;</span><span class="PreProc"> &lt;&lt; __FUNCTION__ &lt;&lt; </span><span class="Constant">&quot;(&quot;</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">__FILE__</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">&quot;:&quot;</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">__LINE__</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">&quot;): trace_count of &quot;</span><span class="PreProc"> &lt;&lt; label &lt;&lt; </span><span class="Constant">&quot; should be &quot;</span><span class="PreProc"> &lt;&lt; count &lt;&lt; </span><span class="cSpecial">'\n'</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L297" class="LineNr">297 </span><span class="PreProc">    cerr &lt;&lt; </span><span class="Constant">&quot;  got &quot;</span><span class="PreProc"> &lt;&lt; trace_count(label) &lt;&lt; </span><span class="cSpecial">'\n'</span><span class="Delimiter">;</span><span class="PreProc">  </span><span class="Comment">/*</span><span class="Comment"> multiple eval </span><span class="Comment">*/</span><span class="PreProc"> \</span>
<span id="L298" class="LineNr">298 </span><span class="PreProc">    <a href='003trace.cc.html#L435'>DUMP</a>(label)</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L299" class="LineNr">299 </span><span class="PreProc">    <a href='002test.cc.html#L21'>Passed</a> = </span><span class="Constant">false</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L300" class="LineNr">300 </span><span class="PreProc">    </span><span class="Identifier">return</span><span class="Delimiter">;</span><span class="PreProc">  </span><span class="Comment">/*</span><span class="Comment"> Currently we stop at the very first failure. </span><span class="Comment">*/</span><span class="PreProc"> \</span>
<span id="L301" class="LineNr">301 </span><span class="PreProc">  </span><span class="Delimiter">}</span>
<span id="L302" class="LineNr">302 </span>
<span id="L303" class="LineNr">303 </span><span class="PreProc">#define CHECK_TRACE_CONTAINS_ERRORS()  CHECK(trace_contains_errors())</span>
<span id="L304" class="LineNr">304 </span><span class="PreProc">#define CHECK_TRACE_DOESNT_CONTAIN_ERRORS() \</span>
<span id="L305" class="LineNr">305 </span><span class="PreProc">  </span><span class="Normal">if</span><span class="PreProc"> (<a href='002test.cc.html#L21'>Passed</a> &amp;&amp; <a href='003trace.cc.html#L262'>trace_contains_errors</a>()) </span><span class="Delimiter">{</span><span class="PreProc"> \</span>
<span id="L306" class="LineNr">306 </span><span class="PreProc">    cerr &lt;&lt; </span><span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">F - &quot;</span><span class="PreProc"> &lt;&lt; __FUNCTION__ &lt;&lt; </span><span class="Constant">&quot;(&quot;</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">__FILE__</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">&quot;:&quot;</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">__LINE__</span><span class="PreProc"> &lt;&lt; </span><span class="Constant">&quot;): unexpected errors</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L307" class="LineNr">307 </span><span class="PreProc">    <a href='003trace.cc.html#L435'>DUMP</a>(</span><span class="Constant">&quot;error&quot;</span><span class="PreProc">)</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L308" class="LineNr">308 </span><span class="PreProc">    <a href='002test.cc.html#L21'>Passed</a> = </span><span class="Constant">false</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L309" class="LineNr">309 </span><span class="PreProc">    </span><span class="Identifier">return</span><span class="Delimiter">;</span><span class="PreProc"> \</span>
<span id="L310" class="LineNr">310 </span><span class="PreProc">  </span><span class="Delimiter">}</span>
<span id="L311" class="LineNr">311 </span>
<span id="L312" class="LineNr">312 </span><span class="Comment">// Allow tests to ignore trace lines generated during setup.</span>
<span id="L313" class="LineNr">313 </span><span class="PreProc">#define CLEAR_TRACE  </span><span class="Normal">delete</span><span class="PreProc"> Trace_stream</span><span class="Delimiter">,</span><span class="PreProc"> Trace_stream = </span><span class="Normal">new</span><span class="PreProc"> trace_stream</span>
<span id="L314" class="LineNr">314 </span>
<span id="L315" class="LineNr">315 </span><span class="Delimiter">:(code)</span>
<span id="L316" class="LineNr">316 </span><span class="Normal">bool</span> <a href='003trace.cc.html#L316'>check_trace_contents</a><span class="Delimiter">(</span>string FUNCTION<span class="Delimiter">,</span> string <span class="Normal">FILE</span><span class="Delimiter">,</span> <span class="Normal">int</span> LINE<span class="Delimiter">,</span> string expected<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L317" class="LineNr">317 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Passed<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L318" class="LineNr">318 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L319" class="LineNr">319 </span>  vector&lt;string&gt; expected_lines = <a href='003trace.cc.html#L407'>split</a><span class="Delimiter">(</span>expected<span class="Delimiter">,</span> <span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">);</span>
<span id="L320" class="LineNr">320 </span>  <span class="Normal">int</span> curr_expected_line = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L321" class="LineNr">321 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span>curr_expected_line &lt; <a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>expected_lines<span class="Delimiter">)</span> &amp;&amp; expected_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>curr_expected_line<span class="Delimiter">).</span>empty<span class="Delimiter">())</span>
<span id="L322" class="LineNr">322 </span>    ++curr_expected_line<span class="Delimiter">;</span>
<span id="L323" class="LineNr">323 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>curr_expected_line == <a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>expected_lines<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L324" class="LineNr">324 </span>  string label<span class="Delimiter">,</span> <a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">;</span>
<span id="L325" class="LineNr">325 </span>  <a href='003trace.cc.html#L386'>split_label_contents</a><span class="Delimiter">(</span>expected_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>curr_expected_line<span class="Delimiter">),</span> &amp;label<span class="Delimiter">,</span> &amp;contents<span class="Delimiter">);</span>
<span id="L326" class="LineNr">326 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L327" class="LineNr">327 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>label != p<span class="Delimiter">-&gt;</span>label<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L328" class="LineNr">328 </span>    string t = <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">);</span>
<span id="L329" class="LineNr">329 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L117'>contents</a> != <a href='003trace.cc.html#L132'>unescape_newline</a><span class="Delimiter">(</span>t<span class="Delimiter">))</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L330" class="LineNr">330 </span>    ++curr_expected_line<span class="Delimiter">;</span>
<span id="L331" class="LineNr">331 </span>    <span class="Normal">while</span> <span class="Delimiter">(</span>curr_expected_line &lt; <a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>expected_lines<span class="Delimiter">)</span> &amp;&amp; expected_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>curr_expected_line<span class="Delimiter">).</span>empty<span class="Delimiter">())</span>
<span id="L332" class="LineNr">332 </span>      ++curr_expected_line<span class="Delimiter">;</span>
<span id="L333" class="LineNr">333 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>curr_expected_line == <a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>expected_lines<span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L334" class="LineNr">334 </span>    <a href='003trace.cc.html#L386'>split_label_contents</a><span class="Delimiter">(</span>expected_lines<span class="Delimiter">.</span>at<span class="Delimiter">(</span>curr_expected_line<span class="Delimiter">),</span> &amp;label<span class="Delimiter">,</span> &amp;contents<span class="Delimiter">);</span>
<span id="L335" class="LineNr">335 </span>  <span class="Delimiter">}</span>
<span id="L336" class="LineNr">336 </span>
<span id="L337" class="LineNr">337 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L399'>line_exists_anywhere</a><span class="Delimiter">(</span>label<span class="Delimiter">,</span> <a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L338" class="LineNr">338 </span>    cerr &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">F - &quot;</span> &lt;&lt; FUNCTION &lt;&lt; <span class="Constant">&quot;(&quot;</span> &lt;&lt; <span class="Normal">FILE</span> &lt;&lt; <span class="Constant">&quot;:&quot;</span> &lt;&lt; LINE &lt;&lt; <span class="Constant">&quot;): <a href='011run.cc.html#L121'>line</a> [&quot;</span> &lt;&lt; label &lt;&lt; <span class="Constant">&quot;: &quot;</span> &lt;&lt; <a href='003trace.cc.html#L117'>contents</a> &lt;&lt; <span class="Constant">&quot;] out of order in <a href='003trace.cc.html#L96'>trace</a>:</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L339" class="LineNr">339 </span>    <a href='003trace.cc.html#L435'>DUMP</a><span class="Delimiter">(</span><span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
<span id="L340" class="LineNr">340 </span>  <span class="Delimiter">}</span>
<span id="L341" class="LineNr">341 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L342" class="LineNr">342 </span>    cerr &lt;&lt; <span class="Constant">&quot;</span><span class="cSpecial">\n</span><span class="Constant">F - &quot;</span> &lt;&lt; FUNCTION &lt;&lt; <span class="Constant">&quot;(&quot;</span> &lt;&lt; <span class="Normal">FILE</span> &lt;&lt; <span class="Constant">&quot;:&quot;</span> &lt;&lt; LINE &lt;&lt; <span class="Constant">&quot;): missing [&quot;</span> &lt;&lt; <a href='003trace.cc.html#L117'>contents</a> &lt;&lt; <span class="Constant">&quot;] in <a href='003trace.cc.html#L96'>trace</a>:</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L343" class="LineNr">343 </span>    <a href='003trace.cc.html#L435'>DUMP</a><span class="Delimiter">(</span>label<span class="Delimiter">);</span>
<span id="L344" class="LineNr">344 </span>  <span class="Delimiter">}</span>
<span id="L345" class="LineNr">345 </span>  <a href='002test.cc.html#L21'>Passed</a> = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L346" class="LineNr">346 </span>  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L347" class="LineNr">347 </span><span class="Delimiter">}</span>
<span id="L348" class="LineNr">348 </span>
<span id="L349" class="LineNr">349 </span><span class="Normal">bool</span> <a href='003trace.cc.html#L349'>trace_doesnt_contain</a><span class="Delimiter">(</span>string expected<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L350" class="LineNr">350 </span>  vector&lt;string&gt; tmp = <a href='003trace.cc.html#L422'>split_first</a><span class="Delimiter">(</span>expected<span class="Delimiter">,</span> <span class="Constant">&quot;: &quot;</span><span class="Delimiter">);</span>
<span id="L351" class="LineNr">351 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L168'>SIZE</a><span class="Delimiter">(</span>tmp<span class="Delimiter">)</span> == <span class="Constant">1</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L352" class="LineNr">352 </span>    <a href='003trace.cc.html#L226'>raise</a> &lt;&lt; expected &lt;&lt; <span class="Constant">&quot;: missing label or <a href='003trace.cc.html#L117'>contents</a> in <a href='003trace.cc.html#L96'>trace</a> <a href='011run.cc.html#L121'>line</a></span><span class="cSpecial">\n</span><span class="Constant">&quot;</span> &lt;&lt; end<span class="Delimiter">();</span>
<span id="L353" class="LineNr">353 </span>    assert<span class="Delimiter">(</span><span class="Constant">false</span><span class="Delimiter">);</span>
<span id="L354" class="LineNr">354 </span>  <span class="Delimiter">}</span>
<span id="L355" class="LineNr">355 </span>  <span class="Identifier">return</span> trace_count<span class="Delimiter">(</span>tmp<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">),</span> tmp<span class="Delimiter">.</span>at<span class="Delimiter">(</span><span class="Constant">1</span><span class="Delimiter">))</span> == <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L356" class="LineNr">356 </span><span class="Delimiter">}</span>
<span id="L357" class="LineNr">357 </span>
<span id="L358" class="LineNr">358 </span><span class="Normal">int</span> trace_count<span class="Delimiter">(</span>string label<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L359" class="LineNr">359 </span>  <span class="Identifier">return</span> trace_count<span class="Delimiter">(</span>label<span class="Delimiter">,</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">);</span>
<span id="L360" class="LineNr">360 </span><span class="Delimiter">}</span>
<span id="L361" class="LineNr">361 </span>
<span id="L362" class="LineNr">362 </span><span class="Normal">int</span> trace_count<span class="Delimiter">(</span>string label<span class="Delimiter">,</span> string <a href='011run.cc.html#L121'>line</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L363" class="LineNr">363 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L364" class="LineNr">364 </span>  <span class="Normal">long</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L365" class="LineNr">365 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L366" class="LineNr">366 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>label == p<span class="Delimiter">-&gt;</span>label<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L367" class="LineNr">367 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='011run.cc.html#L121'>line</a> == <span class="Constant">&quot;&quot;</span> || <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span><a href='011run.cc.html#L121'>line</a><span class="Delimiter">)</span> == <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">))</span>
<span id="L368" class="LineNr">368 </span>        ++result<span class="Delimiter">;</span>
<span id="L369" class="LineNr">369 </span>    <span class="Delimiter">}</span>
<span id="L370" class="LineNr">370 </span>  <span class="Delimiter">}</span>
<span id="L371" class="LineNr">371 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L372" class="LineNr">372 </span><span class="Delimiter">}</span>
<span id="L373" class="LineNr">373 </span>
<span id="L374" class="LineNr">374 </span><span class="Normal">int</span> <a href='003trace.cc.html#L374'>trace_count_prefix</a><span class="Delimiter">(</span>string label<span class="Delimiter">,</span> string prefix<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L375" class="LineNr">375 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>!Trace_stream<span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L376" class="LineNr">376 </span>  <span class="Normal">long</span> result = <span class="Constant">0</span><span class="Delimiter">;</span>
<span id="L377" class="LineNr">377 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L378" class="LineNr">378 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>label == p<span class="Delimiter">-&gt;</span>label<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L379" class="LineNr">379 </span>      <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L104'>starts_with</a><span class="Delimiter">(</span><a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">),</span> <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>prefix<span class="Delimiter">)))</span>
<span id="L380" class="LineNr">380 </span>        ++result<span class="Delimiter">;</span>
<span id="L381" class="LineNr">381 </span>    <span class="Delimiter">}</span>
<span id="L382" class="LineNr">382 </span>  <span class="Delimiter">}</span>
<span id="L383" class="LineNr">383 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L384" class="LineNr">384 </span><span class="Delimiter">}</span>
<span id="L385" class="LineNr">385 </span>
<span id="L386" class="LineNr">386 </span><span class="Normal">void</span> <a href='003trace.cc.html#L386'>split_label_contents</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">,</span> string* label<span class="Delimiter">,</span> string* <a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L387" class="LineNr">387 </span>  <span class="Normal">static</span> <span class="Normal">const</span> string delim<span class="Delimiter">(</span><span class="Constant">&quot;: &quot;</span><span class="Delimiter">);</span>
<span id="L388" class="LineNr">388 </span>  <span class="Normal">size_t</span> pos = s<span class="Delimiter">.</span>find<span class="Delimiter">(</span>delim<span class="Delimiter">);</span>
<span id="L389" class="LineNr">389 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>pos == string::npos<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L390" class="LineNr">390 </span>    *label = <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span id="L391" class="LineNr">391 </span>    *contents = <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>s<span class="Delimiter">);</span>
<span id="L392" class="LineNr">392 </span>  <span class="Delimiter">}</span>
<span id="L393" class="LineNr">393 </span>  <span class="Normal">else</span> <span class="Delimiter">{</span>
<span id="L394" class="LineNr">394 </span>    *label = <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>s<span class="Delimiter">.</span>substr<span class="Delimiter">(</span><span class="Constant">0</span><span class="Delimiter">,</span> pos<span class="Delimiter">));</span>
<span id="L395" class="LineNr">395 </span>    *contents = <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>s<span class="Delimiter">.</span>substr<span class="Delimiter">(</span>pos+SIZE<span class="Delimiter">(</span>delim<span class="Delimiter">)));</span>
<span id="L396" class="LineNr">396 </span>  <span class="Delimiter">}</span>
<span id="L397" class="LineNr">397 </span><span class="Delimiter">}</span>
<span id="L398" class="LineNr">398 </span>
<span id="L399" class="LineNr">399 </span><span class="Normal">bool</span> <a href='003trace.cc.html#L399'>line_exists_anywhere</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; label<span class="Delimiter">,</span> <span class="Normal">const</span> string&amp; <a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L400" class="LineNr">400 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != <a href='003trace.cc.html#L72'>Trace_stream</a><span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L401" class="LineNr">401 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>label != p<span class="Delimiter">-&gt;</span>label<span class="Delimiter">)</span> <span class="Identifier">continue</span><span class="Delimiter">;</span>
<span id="L402" class="LineNr">402 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L117'>contents</a> == <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>p<span class="Delimiter">-&gt;</span><a href='003trace.cc.html#L117'>contents</a><span class="Delimiter">))</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L403" class="LineNr">403 </span>  <span class="Delimiter">}</span>
<span id="L404" class="LineNr">404 </span>  <span class="Identifier">return</span> <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L405" class="LineNr">405 </span><span class="Delimiter">}</span>
<span id="L406" class="LineNr">406 </span>
<span id="L407" class="LineNr">407 </span>vector&lt;string&gt; <a href='003trace.cc.html#L407'>split</a><span class="Delimiter">(</span>string s<span class="Delimiter">,</span> string delim<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L408" class="LineNr">408 </span>  vector&lt;string&gt; result<span class="Delimiter">;</span>
<span id="L409" class="LineNr">409 </span>  <span class="Normal">size_t</span> begin=<span class="Constant">0</span><span class="Delimiter">,</span> end=s<span class="Delimiter">.</span>find<span class="Delimiter">(</span>delim<span class="Delimiter">);</span>
<span id="L410" class="LineNr">410 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span><span class="Constant">true</span><span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L411" class="LineNr">411 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>end == string::npos<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L412" class="LineNr">412 </span>      result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>string<span class="Delimiter">(</span>s<span class="Delimiter">,</span> begin<span class="Delimiter">,</span> string::npos<span class="Delimiter">));</span>
<span id="L413" class="LineNr">413 </span>      <span class="Identifier">break</span><span class="Delimiter">;</span>
<span id="L414" class="LineNr">414 </span>    <span class="Delimiter">}</span>
<span id="L415" class="LineNr">415 </span>    result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>string<span class="Delimiter">(</span>s<span class="Delimiter">,</span> begin<span class="Delimiter">,</span> end-begin<span class="Delimiter">));</span>
<span id="L416" class="LineNr">416 </span>    begin = end+SIZE<span class="Delimiter">(</span>delim<span class="Delimiter">);</span>
<span id="L417" class="LineNr">417 </span>    end = s<span class="Delimiter">.</span>find<span class="Delimiter">(</span>delim<span class="Delimiter">,</span> begin<span class="Delimiter">);</span>
<span id="L418" class="LineNr">418 </span>  <span class="Delimiter">}</span>
<span id="L419" class="LineNr">419 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L420" class="LineNr">420 </span><span class="Delimiter">}</span>
<span id="L421" class="LineNr">421 </span>
<span id="L422" class="LineNr">422 </span>vector&lt;string&gt; <a href='003trace.cc.html#L422'>split_first</a><span class="Delimiter">(</span>string s<span class="Delimiter">,</span> string delim<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L423" class="LineNr">423 </span>  vector&lt;string&gt; result<span class="Delimiter">;</span>
<span id="L424" class="LineNr">424 </span>  <span class="Normal">size_t</span> end=s<span class="Delimiter">.</span>find<span class="Delimiter">(</span>delim<span class="Delimiter">);</span>
<span id="L425" class="LineNr">425 </span>  result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>string<span class="Delimiter">(</span>s<span class="Delimiter">,</span> <span class="Constant">0</span><span class="Delimiter">,</span> end<span class="Delimiter">));</span>
<span id="L426" class="LineNr">426 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>end != string::npos<span class="Delimiter">)</span>
<span id="L427" class="LineNr">427 </span>    result<span class="Delimiter">.</span>push_back<span class="Delimiter">(</span>string<span class="Delimiter">(</span>s<span class="Delimiter">,</span> end+SIZE<span class="Delimiter">(</span>delim<span class="Delimiter">),</span> string::npos<span class="Delimiter">));</span>
<span id="L428" class="LineNr">428 </span>  <span class="Identifier">return</span> result<span class="Delimiter">;</span>
<span id="L429" class="LineNr">429 </span><span class="Delimiter">}</span>
<span id="L430" class="LineNr">430 </span>
<span id="L431" class="LineNr">431 </span><span class="Comment">//:: == Helpers for debugging using traces</span>
<span id="L432" class="LineNr">432 </span>
<span id="L433" class="LineNr">433 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L434" class="LineNr">434 </span><span class="Comment">// To debug why a test is failing, dump its trace using '?'.</span>
<span id="L435" class="LineNr">435 </span><span class="PreProc">#define DUMP(label)  </span><span class="Normal">if</span><span class="PreProc"> (Trace_stream) cerr &lt;&lt; Trace_stream</span><span class="Delimiter">-&gt;</span><span class="PreProc">readable_contents(label)</span><span class="Delimiter">;</span>
<span id="L436" class="LineNr">436 </span>
<span id="L437" class="LineNr">437 </span><span class="Comment">// To add temporary prints to the trace, use 'dbg'.</span>
<span id="L438" class="LineNr">438 </span><span class="Comment">// `git log` should never show any calls to 'dbg'.</span>
<span id="L439" class="LineNr">439 </span><span class="PreProc">#define dbg trace(</span><span class="Constant">0</span><span class="Delimiter">,</span><span class="PreProc"> </span><span class="Constant">&quot;a&quot;</span><span class="PreProc">)</span>
<span id="L440" class="LineNr">440 </span>
<span id="L441" class="LineNr">441 </span><span class="Comment">//: Dump the entire trace to file where it can be browsed offline.</span>
<span id="L442" class="LineNr">442 </span><span class="Comment">//: Dump the trace as it happens; that way you get something even if the</span>
<span id="L443" class="LineNr">443 </span><span class="Comment">//: program crashes.</span>
<span id="L444" class="LineNr">444 </span>
<span id="L445" class="LineNr">445 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L446" class="LineNr">446 </span>ofstream <a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">;</span>
<span id="L447" class="LineNr">447 </span><span class="Delimiter">:(before &quot;End Commandline Options(*arg)&quot;)</span>
<span id="L448" class="LineNr">448 </span><span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L98'>is_equal</a><span class="Delimiter">(</span>*arg<span class="Delimiter">,</span> <span class="Constant">&quot;--trace&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L449" class="LineNr">449 </span>  cerr &lt;&lt; <span class="Constant">&quot;saving <a href='003trace.cc.html#L96'>trace</a> to 'last_run'</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L450" class="LineNr">450 </span>  <a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">.</span>open<span class="Delimiter">(</span><span class="Constant">&quot;last_run&quot;</span><span class="Delimiter">);</span>
<span id="L451" class="LineNr">451 </span>  <span class="Comment">// Add a dummy line up top; otherwise the `browse_trace` tool currently has</span>
<span id="L452" class="LineNr">452 </span>  <span class="Comment">// no way to expand any lines above an error.</span>
<span id="L453" class="LineNr">453 </span>  <a href='003trace.cc.html#L446'>Trace_file</a> &lt;&lt; <span class="Constant">&quot;   0 dummy: start</span><span class="cSpecial">\n</span><span class="Constant">&quot;</span><span class="Delimiter">;</span>
<span id="L454" class="LineNr">454 </span>  <span class="Comment">// End --trace Settings</span>
<span id="L455" class="LineNr">455 </span><span class="Delimiter">}</span>
<span id="L456" class="LineNr">456 </span><span class="Delimiter">:(before &quot;End <a href='003trace.cc.html#L96'>trace</a> Commit&quot;)</span>
<span id="L457" class="LineNr">457 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">.</span>is_open<span class="Delimiter">())</span> <span class="Delimiter">{</span>
<span id="L458" class="LineNr">458 </span>  <a href='003trace.cc.html#L143'>dump_trace_line</a><span class="Delimiter">(</span><a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">,</span> t<span class="Delimiter">);</span>
<span id="L459" class="LineNr">459 </span>  <a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">.</span><a href='011run.cc.html#L198'>flush</a><span class="Delimiter">();</span>
<span id="L460" class="LineNr">460 </span>  <a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>pop_back<span class="Delimiter">();</span>  <span class="Comment">// economize on memory</span>
<span id="L461" class="LineNr">461 </span><span class="Delimiter">}</span>
<span id="L462" class="LineNr">462 </span><span class="Delimiter">:(before &quot;End One-time Setup&quot;)</span>
<span id="L463" class="LineNr">463 </span>atexit<span class="Delimiter">(</span><a href='003trace.cc.html#L465'>cleanup_main</a><span class="Delimiter">);</span>
<span id="L464" class="LineNr">464 </span><span class="Delimiter">:(code)</span>
<span id="L465" class="LineNr">465 </span><span class="Normal">void</span> <a href='003trace.cc.html#L465'>cleanup_main</a><span class="Delimiter">()</span> <span class="Delimiter">{</span>
<span id="L466" class="LineNr">466 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">.</span>is_open<span class="Delimiter">())</span> <a href='003trace.cc.html#L446'>Trace_file</a><span class="Delimiter">.</span>close<span class="Delimiter">();</span>
<span id="L467" class="LineNr">467 </span>  <span class="Comment">// End cleanup_main</span>
<span id="L468" class="LineNr">468 </span><span class="Delimiter">}</span>
<span id="L469" class="LineNr">469 </span>
<span id="L470" class="LineNr">470 </span><span class="Delimiter">:(before &quot;End trace_stream Methods&quot;)</span>
<span id="L471" class="LineNr">471 </span>string <a href='003trace.cc.html#L471'>readable_contents</a><span class="Delimiter">(</span>string label<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L472" class="LineNr">472 </span>  string <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">);</span>  <span class="Comment">// prototype</span>
<span id="L473" class="LineNr">473 </span>  ostringstream output<span class="Delimiter">;</span>
<span id="L474" class="LineNr">474 </span>  label = <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span>label<span class="Delimiter">);</span>
<span id="L475" class="LineNr">475 </span>  <span class="Normal">for</span> <span class="Delimiter">(</span>vector&lt;trace_line&gt;::iterator p = <a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>begin<span class="Delimiter">();</span>  p != <a href='003trace.cc.html#L76'>past_lines</a><span class="Delimiter">.</span>end<span class="Delimiter">();</span>  ++p<span class="Delimiter">)</span>
<span id="L476" class="LineNr">476 </span>    <span class="Normal">if</span> <span class="Delimiter">(</span>label<span class="Delimiter">.</span>empty<span class="Delimiter">()</span> || label == p<span class="Delimiter">-&gt;</span>label<span class="Delimiter">)</span>
<span id="L477" class="LineNr">477 </span>      <a href='003trace.cc.html#L143'>dump_trace_line</a><span class="Delimiter">(</span>output<span class="Delimiter">,</span> *p<span class="Delimiter">);</span>
<span id="L478" class="LineNr">478 </span>  <span class="Identifier">return</span> output<span class="Delimiter">.</span>str<span class="Delimiter">();</span>
<span id="L479" class="LineNr">479 </span><span class="Delimiter">}</span>
<span id="L480" class="LineNr">480 </span>
<span id="L481" class="LineNr">481 </span><span class="Comment">//: Print traces to the screen as they happen.</span>
<span id="L482" class="LineNr">482 </span><span class="Comment">//: Particularly useful when juggling multiple trace streams, like when</span>
<span id="L483" class="LineNr">483 </span><span class="Comment">//: debugging sandboxes.</span>
<span id="L484" class="LineNr">484 </span><span class="Delimiter">:(before &quot;End Globals&quot;)</span>
<span id="L485" class="LineNr">485 </span><span class="Normal">bool</span> <a href='003trace.cc.html#L485'>Dump_trace</a> = <span class="Constant">false</span><span class="Delimiter">;</span>
<span id="L486" class="LineNr">486 </span><span class="Delimiter">:(before &quot;End Commandline Options(*arg)&quot;)</span>
<span id="L487" class="LineNr">487 </span><span class="Normal">else</span> <span class="Normal">if</span> <span class="Delimiter">(</span><a href='001help.cc.html#L98'>is_equal</a><span class="Delimiter">(</span>*arg<span class="Delimiter">,</span> <span class="Constant">&quot;--dump&quot;</span><span class="Delimiter">))</span> <span class="Delimiter">{</span>
<span id="L488" class="LineNr">488 </span>  <a href='003trace.cc.html#L485'>Dump_trace</a> = <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L489" class="LineNr">489 </span><span class="Delimiter">}</span>
<span id="L490" class="LineNr">490 </span><span class="Delimiter">:(before &quot;End Incremental Trace Print Conditions&quot;)</span>
<span id="L491" class="LineNr">491 </span><span class="Normal">if</span> <span class="Delimiter">(</span><a href='003trace.cc.html#L485'>Dump_trace</a><span class="Delimiter">)</span> <span class="Identifier">return</span> <span class="Constant">true</span><span class="Delimiter">;</span>
<span id="L492" class="LineNr">492 </span>
<span id="L493" class="LineNr">493 </span><span class="Comment">//: Miscellaneous helpers.</span>
<span id="L494" class="LineNr">494 </span>
<span id="L495" class="LineNr">495 </span><span class="Delimiter">:(code)</span>
<span id="L496" class="LineNr">496 </span>string <a href='003trace.cc.html#L496'>trim</a><span class="Delimiter">(</span><span class="Normal">const</span> string&amp; s<span class="Delimiter">)</span> <span class="Delimiter">{</span>
<span id="L497" class="LineNr">497 </span>  string::const_iterator first = s<span class="Delimiter">.</span>begin<span class="Delimiter">();</span>
<span id="L498" class="LineNr">498 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span>first != s<span class="Delimiter">.</span>end<span class="Delimiter">()</span> &amp;&amp; isspace<span class="Delimiter">(</span>*first<span class="Delimiter">))</span>
<span id="L499" class="LineNr">499 </span>    ++first<span class="Delimiter">;</span>
<span id="L500" class="LineNr">500 </span>  <span class="Normal">if</span> <span class="Delimiter">(</span>first == s<span class="Delimiter">.</span>end<span class="Delimiter">())</span> <span class="Identifier">return</span> <span class="Constant">&quot;&quot;</span><span class="Delimiter">;</span>
<span id="L501" class="LineNr">501 </span>
<span id="L502" class="LineNr">502 </span>  string::const_iterator last = --s<span class="Delimiter">.</span>end<span class="Delimiter">();</span>
<span id="L503" class="LineNr">503 </span>  <span class="Normal">while</span> <span class="Delimiter">(</span>last != s<span class="Delimiter">.</span>begin<span class="Delimiter">()</span> &amp;&amp; isspace<span class="Delimiter">(</span>*last<span class="Delimiter">))</span>
<span id="L504" class="LineNr">504 </span>    --last<span class="Delimiter">;</span>
<span id="L505" class="LineNr">505 </span>  ++last<span class="Delimiter">;</span>
<span id="L506" class="LineNr">506 </span>  <span class="Identifier">return</span> string<span class="Delimiter">(</span>first<span class="Delimiter">,</span> last<span class="Delimiter">);</span>
<span id="L507" class="LineNr">507 </span><span class="Delimiter">}</span>
<span id="L508" class="LineNr">508 </span>
<span id="L509" class="LineNr">509 </span><span class="Delimiter">:(before &quot;End Includes&quot;)</span>
<span id="L510" class="LineNr">510 </span><span class="PreProc">#include </span><span class="Constant">&lt;vector&gt;</span>
<span id="L511" class="LineNr">511 </span><span class="Normal">using</span> std::vector<span class="Delimiter">;</span>
<span id="L512" class="LineNr">512 </span><span class="PreProc">#include </span><span class="Constant">&lt;list&gt;</span>
<span id="L513" class="LineNr">513 </span><span class="Normal">using</span> std::list<span class="Delimiter">;</span>
<span id="L514" class="LineNr">514 </span><span class="PreProc">#include </span><span class="Constant">&lt;set&gt;</span>
<span id="L515" class="LineNr">515 </span><span class="Normal">using</span> std::set<span class="Delimiter">;</span>
<span id="L516" class="LineNr">516 </span>
<span id="L517" class="LineNr">517 </span><span class="PreProc">#include </span><span class="Constant">&lt;sstream&gt;</span>
<span id="L518" class="LineNr">518 </span><span class="Normal">using</span> std::istringstream<span class="Delimiter">;</span>
<span id="L519" class="LineNr">519 </span><span class="Normal">using</span> std::ostringstream<span class="Delimiter">;</span>
<span id="L520" class="LineNr">520 </span>
<span id="L521" class="LineNr">521 </span><span class="PreProc">#include </span><span class="Constant">&lt;fstream&gt;</span>
<span id="L522" class="LineNr">522 </span><span class="Normal">using</span> std::ifstream<span class="Delimiter">;</span>
<span id="L523" class="LineNr">523 </span><span class="Normal">using</span> std::ofstream<span class="Delimiter">;</span>
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->