/
Control-Lens-Internal.html
499 lines (499 loc) · 119 KB
/
Control-Lens-Internal.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
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<!-- Generated by HsColour, http://code.haskell.org/~malcolm/hscolour/ -->
<title>src/Control/Lens/Internal.hs</title>
<link type='text/css' rel='stylesheet' href='hscolour.css' />
</head>
<body>
<pre><a name="line-1"></a><span class='hs-comment'>{-# LANGUAGE Rank2Types #-}</span>
<a name="line-2"></a><span class='hs-comment'>{-# LANGUAGE TypeFamilies #-}</span>
<a name="line-3"></a><span class='hs-comment'>{-# LANGUAGE FlexibleContexts #-}</span>
<a name="line-4"></a><span class='hs-comment'>{-# LANGUAGE FlexibleInstances #-}</span>
<a name="line-5"></a><span class='hs-comment'>{-# LANGUAGE UndecidableInstances #-}</span>
<a name="line-6"></a><span class='hs-comment'>{-# LANGUAGE MultiParamTypeClasses #-}</span>
<a name="line-7"></a><span class='hs-comment'>{-# LANGUAGE FunctionalDependencies #-}</span>
<a name="line-8"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-9"></a><span class='hs-comment'>-- |</span>
<a name="line-10"></a><span class='hs-comment'>-- Module : Control.Lens.Internal</span>
<a name="line-11"></a><span class='hs-comment'>-- Copyright : (C) 2012 Edward Kmett</span>
<a name="line-12"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span>
<a name="line-13"></a><span class='hs-comment'>-- Maintainer : Edward Kmett <ekmett@gmail.com></span>
<a name="line-14"></a><span class='hs-comment'>-- Stability : provisional</span>
<a name="line-15"></a><span class='hs-comment'>-- Portability : Rank2Types</span>
<a name="line-16"></a><span class='hs-comment'>--</span>
<a name="line-17"></a><span class='hs-comment'>-- These are some of the explicit Functor instances that leak into the</span>
<a name="line-18"></a><span class='hs-comment'>-- type signatures of Control.Lens. You shouldn't need to import this</span>
<a name="line-19"></a><span class='hs-comment'>-- module directly, unless you are coming up with a whole new kind of</span>
<a name="line-20"></a><span class='hs-comment'>-- \"Family\" and need to add instances.</span>
<a name="line-21"></a><span class='hs-comment'>--</span>
<a name="line-22"></a><span class='hs-comment'>----------------------------------------------------------------------------</span>
<a name="line-23"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span><span class='hs-varop'>.</span><span class='hs-conid'>Internal</span>
<a name="line-24"></a> <span class='hs-layout'>(</span>
<a name="line-25"></a> <span class='hs-comment'>-- * Implementation details</span>
<a name="line-26"></a> <span class='hs-conid'>Context</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-27"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Focusing</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-28"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FocusingWith</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-29"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FocusingPlus</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-30"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FocusingOn</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-31"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FocusingErr</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Err</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-32"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>FocusingMay</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>May</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-33"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Traversed</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-34"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Sequenced</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-35"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Indexing</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>IndexingResult</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-36"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Min</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-37"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getMin</span>
<a name="line-38"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Max</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-39"></a> <span class='hs-layout'>,</span> <span class='hs-varid'>getMax</span>
<a name="line-40"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ElementOf</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-41"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>ElementOfResult</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-42"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Bazaar</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>bazaar</span><span class='hs-layout'>,</span> <span class='hs-varid'>duplicateBazaar</span><span class='hs-layout'>,</span> <span class='hs-varid'>sell</span>
<a name="line-43"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Effect</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-44"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>EffectRWS</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-45"></a> <span class='hs-comment'>-- , EffectS(..)</span>
<a name="line-46"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Gettable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Accessor</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Effective</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-varid'>ineffective</span><span class='hs-layout'>,</span> <span class='hs-varid'>noEffect</span><span class='hs-layout'>,</span> <span class='hs-conid'>Folding</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-47"></a> <span class='hs-layout'>,</span> <span class='hs-conid'>Settable</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Mutator</span><span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span>
<a name="line-48"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-49"></a>
<a name="line-50"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span>
<a name="line-51"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Applicative</span><span class='hs-varop'>.</span><span class='hs-conid'>Backwards</span>
<a name="line-52"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Category</span>
<a name="line-53"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Comonad</span>
<a name="line-54"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Comonad</span><span class='hs-varop'>.</span><span class='hs-conid'>Store</span><span class='hs-varop'>.</span><span class='hs-conid'>Class</span>
<a name="line-55"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Lens</span><span class='hs-varop'>.</span><span class='hs-conid'>Isomorphic</span>
<a name="line-56"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Control</span><span class='hs-varop'>.</span><span class='hs-conid'>Monad</span>
<a name="line-57"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Prelude</span> <span class='hs-varid'>hiding</span> <span class='hs-layout'>(</span><span class='hs-layout'>(</span><span class='hs-varop'>.</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span><span class='hs-varid'>id</span><span class='hs-layout'>)</span>
<a name="line-58"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Functor</span><span class='hs-varop'>.</span><span class='hs-conid'>Compose</span>
<a name="line-59"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Functor</span><span class='hs-varop'>.</span><span class='hs-conid'>Identity</span>
<a name="line-60"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>Data</span><span class='hs-varop'>.</span><span class='hs-conid'>Monoid</span>
<a name="line-61"></a>
<a name="line-62"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-63"></a><span class='hs-comment'>-- Functors</span>
<a name="line-64"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-65"></a>
<a name="line-66"></a><a name="Focusing"></a><span class='hs-comment'>-- | Used by 'Control.Lens.Type.Zoom' to 'Control.Lens.Type.zoom' into 'Control.Monad.State.StateT'</span>
<a name="line-67"></a><a name="Focusing"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Focusing</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Focusing</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unfocusing</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-68"></a>
<a name="line-69"></a><a name="instance%20Functor%20(Focusing%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Focusing</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-70"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Focusing</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Focusing</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-71"></a> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>m</span>
<a name="line-72"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-73"></a>
<a name="line-74"></a><a name="instance%20Applicative%20(Focusing%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Focusing</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-75"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Focusing</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-76"></a> <span class='hs-conid'>Focusing</span> <span class='hs-varid'>mf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Focusing</span> <span class='hs-varid'>ma</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Focusing</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-77"></a> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mf</span>
<a name="line-78"></a> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ma</span>
<a name="line-79"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-80"></a>
<a name="line-81"></a><a name="FocusingWith"></a><span class='hs-comment'>-- | Used by 'Control.Lens.Type.Zoom' to 'Control.Lens.Type.zoom' into 'Control.Monad.RWS.RWST'</span>
<a name="line-82"></a><a name="FocusingWith"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>FocusingWith</span> <span class='hs-varid'>w</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingWith</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unfocusingWith</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-83"></a>
<a name="line-84"></a><a name="instance%20Functor%20(FocusingWith%20w%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingWith</span> <span class='hs-varid'>w</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-85"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingWith</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingWith</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-86"></a> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>m</span>
<a name="line-87"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span>
<a name="line-88"></a>
<a name="line-89"></a><a name="instance%20Applicative%20(FocusingWith%20w%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingWith</span> <span class='hs-varid'>w</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-90"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingWith</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-91"></a> <span class='hs-conid'>FocusingWith</span> <span class='hs-varid'>mf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>FocusingWith</span> <span class='hs-varid'>ma</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingWith</span> <span class='hs-varop'>$</span> <span class='hs-keyword'>do</span>
<a name="line-92"></a> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>mf</span>
<a name="line-93"></a> <span class='hs-layout'>(</span><span class='hs-varid'>d</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'><-</span> <span class='hs-varid'>ma</span>
<a name="line-94"></a> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>,</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>,</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>w</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span>
<a name="line-95"></a>
<a name="line-96"></a><a name="FocusingPlus"></a><span class='hs-comment'>-- | Used by 'Control.Lens.Type.Zoom' to 'Control.Lens.Type.zoom' into 'Control.Monad.Writer.WriterT'.</span>
<a name="line-97"></a><a name="FocusingPlus"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>FocusingPlus</span> <span class='hs-varid'>w</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingPlus</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unfocusingPlus</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-98"></a>
<a name="line-99"></a><a name="instance%20Functor%20(FocusingPlus%20w%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingPlus</span> <span class='hs-varid'>w</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-100"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingPlus</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingPlus</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-101"></a>
<a name="line-102"></a><a name="instance%20Applicative%20(FocusingPlus%20w%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monoid</span> <span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-varid'>w</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingPlus</span> <span class='hs-varid'>w</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-103"></a> <span class='hs-varid'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingPlus</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pure</span>
<a name="line-104"></a> <span class='hs-conid'>FocusingPlus</span> <span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>FocusingPlus</span> <span class='hs-varid'>ka</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingPlus</span> <span class='hs-layout'>(</span><span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-varid'>ka</span><span class='hs-layout'>)</span>
<a name="line-105"></a>
<a name="line-106"></a><a name="FocusingOn"></a><span class='hs-comment'>-- | Used by 'Control.Lens.Type.Zoom' to 'Control.Lens.Type.zoom' into 'Control.Monad.Trans.Maybe.MaybeT' or 'Control.Monad.Trans.List.ListT'</span>
<a name="line-107"></a><a name="FocusingOn"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>FocusingOn</span> <span class='hs-varid'>f</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingOn</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unfocusingOn</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-108"></a>
<a name="line-109"></a><a name="instance%20Functor%20(FocusingOn%20f%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingOn</span> <span class='hs-varid'>f</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-110"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingOn</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingOn</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-111"></a>
<a name="line-112"></a><a name="instance%20Applicative%20(FocusingOn%20f%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingOn</span> <span class='hs-varid'>f</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-113"></a> <span class='hs-varid'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingOn</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pure</span>
<a name="line-114"></a> <span class='hs-conid'>FocusingOn</span> <span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>FocusingOn</span> <span class='hs-varid'>ka</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingOn</span> <span class='hs-layout'>(</span><span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-varid'>ka</span><span class='hs-layout'>)</span>
<a name="line-115"></a>
<a name="line-116"></a><a name="May"></a><span class='hs-comment'>-- | Make a monoid out of 'Maybe' for error handling</span>
<a name="line-117"></a><a name="May"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>May</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>May</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getMay</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-118"></a>
<a name="line-119"></a><a name="instance%20Monoid%20(May%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>May</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-120"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>May</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-121"></a> <span class='hs-conid'>May</span> <span class='hs-conid'>Nothing</span> <span class='hs-varop'>`mappend`</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>May</span> <span class='hs-conid'>Nothing</span>
<a name="line-122"></a> <span class='hs-keyword'>_</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>May</span> <span class='hs-conid'>Nothing</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>May</span> <span class='hs-conid'>Nothing</span>
<a name="line-123"></a> <span class='hs-conid'>May</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>May</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>May</span> <span class='hs-layout'>(</span><span class='hs-conid'>Just</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-124"></a>
<a name="line-125"></a><a name="FocusingMay"></a><span class='hs-comment'>-- | Used by 'Control.Lens.Type.Zoom' to 'Control.Lens.Type.zoom' into 'Control.Monad.Error.ErrorT'</span>
<a name="line-126"></a><a name="FocusingMay"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>FocusingMay</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingMay</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unfocusingMay</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>May</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-127"></a>
<a name="line-128"></a><a name="instance%20Functor%20(FocusingMay%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>May</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingMay</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-129"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingMay</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingMay</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-130"></a>
<a name="line-131"></a><a name="instance%20Applicative%20(FocusingMay%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>May</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingMay</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-132"></a> <span class='hs-varid'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingMay</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pure</span>
<a name="line-133"></a> <span class='hs-conid'>FocusingMay</span> <span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>FocusingMay</span> <span class='hs-varid'>ka</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingMay</span> <span class='hs-layout'>(</span><span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-varid'>ka</span><span class='hs-layout'>)</span>
<a name="line-134"></a>
<a name="line-135"></a><a name="Err"></a><span class='hs-comment'>-- | Make a monoid out of 'Either' for error handling</span>
<a name="line-136"></a><a name="Err"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Err</span> <span class='hs-varid'>e</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getErr</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Either</span> <span class='hs-varid'>e</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-137"></a>
<a name="line-138"></a><a name="instance%20Monoid%20(Err%20e%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Err</span> <span class='hs-varid'>e</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-139"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-140"></a> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-141"></a> <span class='hs-keyword'>_</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Left</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span>
<a name="line-142"></a> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Err</span> <span class='hs-layout'>(</span><span class='hs-conid'>Right</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-143"></a>
<a name="line-144"></a><a name="FocusingErr"></a><span class='hs-comment'>-- | Used by 'Control.Lens.Type.Zoom' to 'Control.Lens.Type.zoom' into 'Control.Monad.Error.ErrorT'</span>
<a name="line-145"></a><a name="FocusingErr"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>FocusingErr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingErr</span> <span class='hs-layout'>{</span> <span class='hs-varid'>unfocusingErr</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Err</span> <span class='hs-varid'>e</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-146"></a>
<a name="line-147"></a><a name="instance%20Functor%20(FocusingErr%20e%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Err</span> <span class='hs-varid'>e</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingErr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-148"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingErr</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingErr</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-149"></a>
<a name="line-150"></a><a name="instance%20Applicative%20(FocusingErr%20e%20k%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-conid'>Err</span> <span class='hs-varid'>e</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>FocusingErr</span> <span class='hs-varid'>e</span> <span class='hs-varid'>k</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-151"></a> <span class='hs-varid'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingErr</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pure</span>
<a name="line-152"></a> <span class='hs-conid'>FocusingErr</span> <span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>FocusingErr</span> <span class='hs-varid'>ka</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>FocusingErr</span> <span class='hs-layout'>(</span><span class='hs-varid'>kf</span> <span class='hs-varop'><*></span> <span class='hs-varid'>ka</span><span class='hs-layout'>)</span>
<a name="line-153"></a>
<a name="line-154"></a><a name="Context"></a><span class='hs-comment'>-- | The indexed store can be used to characterize a 'Control.Lens.Type.Lens'</span>
<a name="line-155"></a><a name="Context"></a><span class='hs-comment'>-- and is used by 'Control.Lens.Type.clone'</span>
<a name="line-156"></a><a name="Context"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Context</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Context</span> <span class='hs-layout'>(</span><span class='hs-varid'>d</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-157"></a>
<a name="line-158"></a><a name="instance%20Functor%20(Context%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-159"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Context</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-160"></a>
<a name="line-161"></a><a name="instance%20Comonad%20(Context%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>~</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Comonad</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-162"></a> <span class='hs-varid'>extract</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span>
<a name="line-163"></a> <span class='hs-varid'>duplicate</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Context</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-164"></a> <span class='hs-varid'>extend</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Context</span> <span class='hs-layout'>(</span><span class='hs-varid'>g</span> <span class='hs-varop'>.</span> <span class='hs-conid'>Context</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-varid'>c</span>
<a name="line-165"></a>
<a name="line-166"></a><a name="instance%20ComonadStore%20c%20(Context%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>~</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ComonadStore</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-167"></a> <span class='hs-varid'>pos</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-keyword'>_</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>c</span>
<a name="line-168"></a> <span class='hs-varid'>peek</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varid'>c</span>
<a name="line-169"></a> <span class='hs-varid'>peeks</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-170"></a> <span class='hs-varid'>seek</span> <span class='hs-varid'>c</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-varid'>c</span>
<a name="line-171"></a> <span class='hs-varid'>seeks</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span>
<a name="line-172"></a> <span class='hs-varid'>experiment</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Context</span> <span class='hs-varid'>g</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>g</span> <span class='hs-varop'><$></span> <span class='hs-varid'>f</span> <span class='hs-varid'>c</span>
<a name="line-173"></a>
<a name="line-174"></a><a name="IndexingResult"></a><span class='hs-comment'>-- | The result of 'Indexing'</span>
<a name="line-175"></a><a name="IndexingResult"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IndexingResult</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span>
<a name="line-176"></a>
<a name="line-177"></a><a name="instance%20Functor%20(IndexingResult%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-178"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>fa</span> <span class='hs-varid'>n</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>IndexingResult</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-varid'>fa</span><span class='hs-layout'>)</span> <span class='hs-varid'>n</span>
<a name="line-179"></a>
<a name="line-180"></a><a name="Indexing"></a><span class='hs-comment'>-- | Applicative composition of @'Control.Monad.Trans.State.Lazy.State' 'Int'@ with a 'Functor', used</span>
<a name="line-181"></a><a name="Indexing"></a><span class='hs-comment'>-- by 'Control.Lens.Indexed.indexed'</span>
<a name="line-182"></a><a name="Indexing"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Indexing</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Indexing</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runIndexing</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-183"></a>
<a name="line-184"></a><a name="instance%20Functor%20(Indexing%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Indexing</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-185"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Indexing</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Indexing</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-186"></a>
<a name="line-187"></a><a name="instance%20Applicative%20(Indexing%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Indexing</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-188"></a> <span class='hs-varid'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Indexing</span> <span class='hs-varop'>.</span> <span class='hs-conid'>IndexingResult</span> <span class='hs-varop'>.</span> <span class='hs-varid'>pure</span>
<a name="line-189"></a> <span class='hs-conid'>Indexing</span> <span class='hs-varid'>mf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Indexing</span> <span class='hs-varid'>ma</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Indexing</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mf</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-190"></a> <span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>ff</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ma</span> <span class='hs-varid'>j</span> <span class='hs-keyword'>of</span>
<a name="line-191"></a> <span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>fa</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IndexingResult</span> <span class='hs-layout'>(</span><span class='hs-varid'>ff</span> <span class='hs-varop'><*></span> <span class='hs-varid'>fa</span><span class='hs-layout'>)</span> <span class='hs-varid'>k</span>
<a name="line-192"></a>
<a name="line-193"></a><a name="instance%20Gettable%20(Indexing%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Indexing</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-194"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Indexing</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Indexing</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>m</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-195"></a> <span class='hs-conid'>IndexingResult</span> <span class='hs-varid'>ff</span> <span class='hs-varid'>j</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>IndexingResult</span> <span class='hs-layout'>(</span><span class='hs-varid'>coerce</span> <span class='hs-varid'>ff</span><span class='hs-layout'>)</span> <span class='hs-varid'>j</span>
<a name="line-196"></a>
<a name="line-197"></a><a name="Traversed"></a><span class='hs-comment'>-- | Used internally by 'Control.Lens.Traversal.traverseOf_' and the like.</span>
<a name="line-198"></a><a name="Traversed"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Traversed</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Traversed</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getTraversed</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span> <span class='hs-conid'>()</span> <span class='hs-layout'>}</span>
<a name="line-199"></a>
<a name="line-200"></a><a name="instance%20Monoid%20(Traversed%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Traversed</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-201"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Traversed</span> <span class='hs-layout'>(</span><span class='hs-varid'>pure</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-202"></a> <span class='hs-conid'>Traversed</span> <span class='hs-varid'>ma</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>Traversed</span> <span class='hs-varid'>mb</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Traversed</span> <span class='hs-layout'>(</span><span class='hs-varid'>ma</span> <span class='hs-varop'>*></span> <span class='hs-varid'>mb</span><span class='hs-layout'>)</span>
<a name="line-203"></a>
<a name="line-204"></a><a name="Sequenced"></a><span class='hs-comment'>-- | Used internally by 'Control.Lens.Traversal.mapM_' and the like.</span>
<a name="line-205"></a><a name="Sequenced"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Sequenced</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Sequenced</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getSequenced</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>m</span> <span class='hs-conid'>()</span> <span class='hs-layout'>}</span>
<a name="line-206"></a>
<a name="line-207"></a><a name="instance%20Monoid%20(Sequenced%20m)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Sequenced</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-208"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Sequenced</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-conid'>()</span><span class='hs-layout'>)</span>
<a name="line-209"></a> <span class='hs-conid'>Sequenced</span> <span class='hs-varid'>ma</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>Sequenced</span> <span class='hs-varid'>mb</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Sequenced</span> <span class='hs-layout'>(</span><span class='hs-varid'>ma</span> <span class='hs-varop'>>></span> <span class='hs-varid'>mb</span><span class='hs-layout'>)</span>
<a name="line-210"></a>
<a name="line-211"></a><a name="Min"></a><span class='hs-comment'>-- | Used for 'Control.Lens.Fold.minimumOf'</span>
<a name="line-212"></a><a name="Min"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Min</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoMin</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Min</span> <span class='hs-varid'>a</span>
<a name="line-213"></a>
<a name="line-214"></a><a name="instance%20Monoid%20(Min%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Min</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-215"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoMin</span>
<a name="line-216"></a> <span class='hs-varid'>mappend</span> <span class='hs-conid'>NoMin</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-217"></a> <span class='hs-varid'>mappend</span> <span class='hs-varid'>m</span> <span class='hs-conid'>NoMin</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-218"></a> <span class='hs-varid'>mappend</span> <span class='hs-layout'>(</span><span class='hs-conid'>Min</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Min</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Min</span> <span class='hs-layout'>(</span><span class='hs-varid'>min</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-219"></a>
<a name="line-220"></a><a name="getMin"></a><span class='hs-comment'>-- | Obtain the minimum.</span>
<a name="line-221"></a><span class='hs-definition'>getMin</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Min</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span>
<a name="line-222"></a><span class='hs-definition'>getMin</span> <span class='hs-conid'>NoMin</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-223"></a><span class='hs-definition'>getMin</span> <span class='hs-layout'>(</span><span class='hs-conid'>Min</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>a</span>
<a name="line-224"></a>
<a name="line-225"></a><a name="Max"></a><span class='hs-comment'>-- | Used for 'Control.Lens.Fold.maximumOf'</span>
<a name="line-226"></a><a name="Max"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Max</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoMax</span> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Max</span> <span class='hs-varid'>a</span>
<a name="line-227"></a>
<a name="line-228"></a><a name="instance%20Monoid%20(Max%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Ord</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Max</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-229"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NoMax</span>
<a name="line-230"></a> <span class='hs-varid'>mappend</span> <span class='hs-conid'>NoMax</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-231"></a> <span class='hs-varid'>mappend</span> <span class='hs-varid'>m</span> <span class='hs-conid'>NoMax</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span>
<a name="line-232"></a> <span class='hs-varid'>mappend</span> <span class='hs-layout'>(</span><span class='hs-conid'>Max</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Max</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Max</span> <span class='hs-layout'>(</span><span class='hs-varid'>max</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-233"></a>
<a name="line-234"></a><a name="getMax"></a><span class='hs-comment'>-- | Obtain the maximum</span>
<a name="line-235"></a><span class='hs-definition'>getMax</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Max</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Maybe</span> <span class='hs-varid'>a</span>
<a name="line-236"></a><span class='hs-definition'>getMax</span> <span class='hs-conid'>NoMax</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Nothing</span>
<a name="line-237"></a><span class='hs-definition'>getMax</span> <span class='hs-layout'>(</span><span class='hs-conid'>Max</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Just</span> <span class='hs-varid'>a</span>
<a name="line-238"></a>
<a name="line-239"></a><a name="ElementOfResult"></a><span class='hs-comment'>-- | The result of trying to find the /n/th 'Control.Lens.Traversal.element' of a 'Control.Lens.Traversal.Traversal'.</span>
<a name="line-240"></a><a name="ElementOfResult"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>ElementOfResult</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span>
<a name="line-241"></a> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Searching</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-varid'>a</span>
<a name="line-242"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Found</span> <span class='hs-comment'>{-# UNPACK #-}</span> <span class='hs-varop'>!</span><span class='hs-conid'>Int</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-243"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>NotFound</span> <span class='hs-conid'>String</span>
<a name="line-244"></a>
<a name="line-245"></a><a name="instance%20Functor%20(ElementOfResult%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>ElementOfResult</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-246"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Searching</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Searching</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-247"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Found</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Found</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-248"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span>
<a name="line-249"></a>
<a name="line-250"></a><a name="ElementOf"></a><span class='hs-comment'>-- | Used to find the /n/th 'Control.Lens.Traversal.element' of a 'Control.Lens.Traversal.Traversal'.</span>
<a name="line-251"></a><a name="ElementOf"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>ElementOf</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ElementOf</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getElementOf</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>ElementOfResult</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-252"></a>
<a name="line-253"></a><a name="instance%20Functor%20(ElementOf%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>ElementOf</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-254"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>ElementOf</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ElementOf</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>m</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-255"></a> <span class='hs-conid'>Searching</span> <span class='hs-varid'>j</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Searching</span> <span class='hs-varid'>j</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-256"></a> <span class='hs-conid'>Found</span> <span class='hs-varid'>j</span> <span class='hs-keyword'>as</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Found</span> <span class='hs-varid'>j</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-257"></a> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span>
<a name="line-258"></a>
<a name="line-259"></a><a name="instance%20Applicative%20(ElementOf%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>ElementOf</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-260"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ElementOf</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Searching</span> <span class='hs-varid'>i</span> <span class='hs-varid'>a</span>
<a name="line-261"></a> <span class='hs-conid'>ElementOf</span> <span class='hs-varid'>mf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>ElementOf</span> <span class='hs-varid'>ma</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ElementOf</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>mf</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-262"></a> <span class='hs-conid'>Found</span> <span class='hs-varid'>j</span> <span class='hs-varid'>ff</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ma</span> <span class='hs-varid'>j</span> <span class='hs-keyword'>of</span>
<a name="line-263"></a> <span class='hs-conid'>Found</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-str'>"multiple results"</span>
<a name="line-264"></a> <span class='hs-conid'>Searching</span> <span class='hs-varid'>k</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Found</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-layout'>(</span><span class='hs-varop'>$</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-varid'>ff</span><span class='hs-layout'>)</span>
<a name="line-265"></a> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span>
<a name="line-266"></a> <span class='hs-conid'>Searching</span> <span class='hs-varid'>j</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>ma</span> <span class='hs-varid'>j</span> <span class='hs-keyword'>of</span>
<a name="line-267"></a> <span class='hs-conid'>Found</span> <span class='hs-varid'>k</span> <span class='hs-keyword'>as</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Found</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-268"></a> <span class='hs-conid'>Searching</span> <span class='hs-varid'>k</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Searching</span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-269"></a> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span>
<a name="line-270"></a> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>e</span>
<a name="line-271"></a>
<a name="line-272"></a>
<a name="line-273"></a><a name="Bazaar"></a><span class='hs-comment'>-- | This is used to characterize a 'Control.Lens.Traversal.Traversal'.</span>
<a name="line-274"></a><a name="Bazaar"></a><span class='hs-comment'>--</span>
<a name="line-275"></a><a name="Bazaar"></a><span class='hs-comment'>-- a.k.a. indexed Cartesian store comonad, indexed Kleene store comonad, or an indexed 'FunList'.</span>
<a name="line-276"></a><a name="Bazaar"></a><span class='hs-comment'>--</span>
<a name="line-277"></a><a name="Bazaar"></a><span class='hs-comment'>-- <<a href="http://twanvl.nl/blog/haskell/non-regular1">http://twanvl.nl/blog/haskell/non-regular1</a>></span>
<a name="line-278"></a><a name="Bazaar"></a><span class='hs-comment'>--</span>
<a name="line-279"></a><a name="Bazaar"></a><span class='hs-comment'>-- Mnemonically, a 'Bazaar' holds many stores and you can easily add more.</span>
<a name="line-280"></a><a name="Bazaar"></a><span class='hs-comment'>--</span>
<a name="line-281"></a><a name="Bazaar"></a><span class='hs-comment'>-- This is a final encoding of 'Bazaar'.</span>
<a name="line-282"></a><a name="Bazaar"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bazaar</span> <span class='hs-layout'>{</span> <span class='hs-sel'>_runBazaar</span> <span class='hs-keyglyph'>::</span> <span class='hs-keyword'>forall</span> <span class='hs-varid'>f</span><span class='hs-varop'>.</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-283"></a>
<a name="line-284"></a><a name="instance%20Functor%20(Bazaar%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-285"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bazaar</span> <span class='hs-layout'>(</span><span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-varop'>.</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-286"></a>
<a name="line-287"></a><a name="instance%20Applicative%20(Bazaar%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-288"></a> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bazaar</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>pure</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-289"></a> <span class='hs-comment'>{-# INLINE pure #-}</span>
<a name="line-290"></a> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>mf</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>ma</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bazaar</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>mf</span> <span class='hs-varid'>k</span> <span class='hs-varop'><*></span> <span class='hs-varid'>ma</span> <span class='hs-varid'>k</span><span class='hs-layout'>)</span>
<a name="line-291"></a> <span class='hs-comment'>{-# INLINE (<*>) #-}</span>
<a name="line-292"></a>
<a name="line-293"></a><a name="instance%20Comonad%20(Bazaar%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>~</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Comonad</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-294"></a> <span class='hs-varid'>extract</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runIdentity</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-conid'>Identity</span><span class='hs-layout'>)</span>
<a name="line-295"></a> <span class='hs-comment'>{-# INLINE extract #-}</span>
<a name="line-296"></a> <span class='hs-varid'>duplicate</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>duplicateBazaar</span>
<a name="line-297"></a> <span class='hs-comment'>{-# INLINE duplicate #-}</span>
<a name="line-298"></a>
<a name="line-299"></a><a name="bazaar"></a><span class='hs-comment'>-- | Given an action to run for each matched pair, traverse a bazaar.</span>
<a name="line-300"></a><span class='hs-definition'>bazaar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-301"></a><span class='hs-definition'>bazaar</span> <span class='hs-varid'>cfd</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>m</span> <span class='hs-varid'>cfd</span>
<a name="line-302"></a><span class='hs-comment'>{-# INLINE bazaar #-}</span>
<a name="line-303"></a>
<a name="line-304"></a><a name="duplicateBazaar"></a><span class='hs-comment'>-- | 'Bazaar' is an indexed 'Comonad'.</span>
<a name="line-305"></a><span class='hs-definition'>duplicateBazaar</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>e</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>d</span> <span class='hs-varid'>e</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-306"></a><span class='hs-definition'>duplicateBazaar</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>getCompose</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Compose</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>sell</span> <span class='hs-varop'>.</span> <span class='hs-varid'>sell</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span>
<a name="line-307"></a><span class='hs-comment'>{-# INLINE duplicateBazaar #-}</span>
<a name="line-308"></a><span class='hs-comment'>-- duplicateBazaar' (Bazaar m) = Bazaar (\g -> getCompose (m (Compose . fmap sell . g)))</span>
<a name="line-309"></a>
<a name="line-310"></a><a name="sell"></a><span class='hs-comment'>-- | A trivial 'Bazaar'.</span>
<a name="line-311"></a><span class='hs-definition'>sell</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>c</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span> <span class='hs-varid'>d</span>
<a name="line-312"></a><span class='hs-definition'>sell</span> <span class='hs-varid'>i</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Bazaar</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>\</span><span class='hs-varid'>k</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>k</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span>
<a name="line-313"></a><span class='hs-comment'>{-# INLINE sell #-}</span>
<a name="line-314"></a>
<a name="line-315"></a><a name="instance%20ComonadApply%20(Bazaar%20c%20d)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span> <span class='hs-keyglyph'>~</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>ComonadApply</span> <span class='hs-layout'>(</span><span class='hs-conid'>Bazaar</span> <span class='hs-varid'>c</span> <span class='hs-varid'>d</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-316"></a> <span class='hs-layout'>(</span><span class='hs-varop'><@></span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-layout'>(</span><span class='hs-varop'><*></span><span class='hs-layout'>)</span>
<a name="line-317"></a>
<a name="line-318"></a><a name="Effect"></a><span class='hs-comment'>-- | Wrap a monadic effect with a phantom type argument.</span>
<a name="line-319"></a><a name="Effect"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getEffect</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-layout'>}</span>
<a name="line-320"></a>
<a name="line-321"></a><a name="instance%20Functor%20(Effect%20m%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-322"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span>
<a name="line-323"></a>
<a name="line-324"></a><a name="instance%20Monoid%20(Effect%20m%20r%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-325"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-326"></a> <span class='hs-conid'>Effect</span> <span class='hs-varid'>ma</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>Effect</span> <span class='hs-varid'>mb</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM2</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>ma</span> <span class='hs-varid'>mb</span><span class='hs-layout'>)</span>
<a name="line-327"></a>
<a name="line-328"></a><a name="instance%20Applicative%20(Effect%20m%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-329"></a> <span class='hs-varid'>pure</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-layout'>(</span><span class='hs-varid'>return</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-330"></a> <span class='hs-conid'>Effect</span> <span class='hs-varid'>ma</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Effect</span> <span class='hs-varid'>mb</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM2</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>ma</span> <span class='hs-varid'>mb</span><span class='hs-layout'>)</span>
<a name="line-331"></a>
<a name="line-332"></a><a name="EffectRWS"></a><span class='hs-comment'>-- | Wrap a monadic effect with a phantom type argument. Used when magnifying RWST.</span>
<a name="line-333"></a><a name="EffectRWS"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>w</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EffectRWS</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getEffectRWS</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>s</span><span class='hs-layout'>,</span><span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-layout'>}</span>
<a name="line-334"></a>
<a name="line-335"></a><a name="instance%20Functor%20(EffectRWS%20w%20s%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>w</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-336"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>m</span>
<a name="line-337"></a>
<a name="line-338"></a><a name="instance%20Applicative%20(EffectRWS%20w%20s%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monoid</span> <span class='hs-varid'>c</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>w</span><span class='hs-layout'>,</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>w</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-339"></a> <span class='hs-varid'>pure</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EffectRWS</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mempty</span><span class='hs-layout'>,</span> <span class='hs-varid'>s</span><span class='hs-layout'>,</span> <span class='hs-varid'>mempty</span><span class='hs-layout'>)</span>
<a name="line-340"></a> <span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>m</span> <span class='hs-varop'><*></span> <span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>n</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EffectRWS</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>s</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-varid'>c</span><span class='hs-layout'>,</span><span class='hs-varid'>t</span><span class='hs-layout'>,</span><span class='hs-varid'>w</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>n</span> <span class='hs-varid'>t</span> <span class='hs-varop'>>>=</span> <span class='hs-keyglyph'>\</span> <span class='hs-layout'>(</span><span class='hs-varid'>c'</span><span class='hs-layout'>,</span><span class='hs-varid'>u</span><span class='hs-layout'>,</span><span class='hs-varid'>w'</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>return</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span> <span class='hs-varid'>c</span> <span class='hs-varid'>c'</span><span class='hs-layout'>,</span> <span class='hs-varid'>u</span><span class='hs-layout'>,</span> <span class='hs-varid'>mappend</span> <span class='hs-varid'>w</span> <span class='hs-varid'>w'</span><span class='hs-layout'>)</span>
<a name="line-341"></a>
<a name="line-342"></a><span class='hs-comment'>{-
<a name="line-343"></a>-- | Wrap a monadic effect with a phantom type argument. Used when magnifying StateT.
<a name="line-344"></a>newtype EffectS s k c a = EffectS { runEffect :: s -> k (c, s) a }
<a name="line-345"></a>
<a name="line-346"></a>instance Functor (k (c, s)) => Functor (EffectS s m c) where
<a name="line-347"></a> fmap f (EffectS m) = EffectS (fmap f . m)
<a name="line-348"></a>
<a name="line-349"></a>instance (Monoid c, Monad m) => Applicative (EffectS s m c) where
<a name="line-350"></a> pure _ = EffectS $ \s -> return (mempty, s)
<a name="line-351"></a> EffectS m <*> EffectS n = EffectS $ \s -> m s >>= \ (c,t) -> n s >>= \ (d, u) -> return (mappend c d, u)
<a name="line-352"></a>-}</span>
<a name="line-353"></a>
<a name="line-354"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-355"></a><span class='hs-comment'>-- Gettables & Accessors</span>
<a name="line-356"></a><span class='hs-comment'>-------------------------------------------------------------------------------</span>
<a name="line-357"></a>
<a name="line-358"></a><a name="Gettable"></a><span class='hs-comment'>-- | Generalizing 'Const' so we can apply simple 'Applicative'</span>
<a name="line-359"></a><a name="Gettable"></a><span class='hs-comment'>-- transformations to it and so we can get nicer error messages</span>
<a name="line-360"></a><a name="Gettable"></a><span class='hs-comment'>--</span>
<a name="line-361"></a><a name="Gettable"></a><span class='hs-comment'>-- A 'Gettable' 'Functor' ignores its argument, which it carries solely as a</span>
<a name="line-362"></a><a name="Gettable"></a><span class='hs-comment'>-- phantom type parameter.</span>
<a name="line-363"></a><a name="Gettable"></a><span class='hs-comment'>--</span>
<a name="line-364"></a><a name="Gettable"></a><span class='hs-comment'>-- To ensure this, an instance of 'Gettable' is required to satisfy:</span>
<a name="line-365"></a><a name="Gettable"></a><span class='hs-comment'>--</span>
<a name="line-366"></a><a name="Gettable"></a><span class='hs-comment'>-- @'id' = 'fmap' f = 'coerce'@</span>
<a name="line-367"></a><a name="Gettable"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>where</span>
<a name="line-368"></a> <span class='hs-comment'>-- | Replace the phantom type argument.</span>
<a name="line-369"></a> <span class='hs-varid'>coerce</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>f</span> <span class='hs-varid'>b</span>
<a name="line-370"></a>
<a name="line-371"></a><a name="instance%20Gettable%20(Const%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Const</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-372"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Const</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Const</span> <span class='hs-varid'>m</span>
<a name="line-373"></a>
<a name="line-374"></a><a name="instance%20Gettable%20(Backwards%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Backwards</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-375"></a> <span class='hs-varid'>coerce</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Backwards</span> <span class='hs-varop'>.</span> <span class='hs-varid'>coerce</span> <span class='hs-varop'>.</span> <span class='hs-varid'>forwards</span>
<a name="line-376"></a>
<a name="line-377"></a><a name="instance%20Gettable%20(Compose%20f%20g)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Functor</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Compose</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-378"></a> <span class='hs-varid'>coerce</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Compose</span> <span class='hs-varop'>.</span> <span class='hs-varid'>fmap</span> <span class='hs-varid'>coerce</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getCompose</span>
<a name="line-379"></a>
<a name="line-380"></a><a name="instance%20Gettable%20(Effect%20m%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-381"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span>
<a name="line-382"></a>
<a name="line-383"></a><a name="instance%20Gettable%20(EffectRWS%20w%20s%20m%20c)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>w</span> <span class='hs-varid'>s</span> <span class='hs-varid'>m</span> <span class='hs-varid'>c</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-384"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>EffectRWS</span> <span class='hs-varid'>m</span>
<a name="line-385"></a>
<a name="line-386"></a><span class='hs-comment'>--instance Gettable (EffectS s m c) where</span>
<a name="line-387"></a><span class='hs-comment'>-- coerce (EffectS m) = EffectS m</span>
<a name="line-388"></a>
<a name="line-389"></a><a name="instance%20Gettable%20(ElementOf%20f)"></a><span class='hs-comment'>-- | This instance is a lie, but it is a useful lie.</span>
<a name="line-390"></a><a name="instance%20Gettable%20(ElementOf%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>ElementOf</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-391"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>ElementOf</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>ElementOf</span> <span class='hs-varop'>$</span> <span class='hs-keyglyph'>\</span><span class='hs-varid'>i</span> <span class='hs-keyglyph'>-></span> <span class='hs-keyword'>case</span> <span class='hs-varid'>m</span> <span class='hs-varid'>i</span> <span class='hs-keyword'>of</span>
<a name="line-392"></a> <span class='hs-conid'>Searching</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-str'>"coerced while searching"</span> <span class='hs-comment'>-- er...</span>
<a name="line-393"></a> <span class='hs-conid'>Found</span> <span class='hs-varid'>j</span> <span class='hs-keyword'>as</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Found</span> <span class='hs-varid'>j</span> <span class='hs-layout'>(</span><span class='hs-varid'>coerce</span> <span class='hs-keyword'>as</span><span class='hs-layout'>)</span>
<a name="line-394"></a> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>s</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>NotFound</span> <span class='hs-varid'>s</span>
<a name="line-395"></a>
<a name="line-396"></a><a name="instance%20Gettable%20(Accessor%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Gettable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-397"></a> <span class='hs-varid'>coerce</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Accessor</span> <span class='hs-varid'>m</span>
<a name="line-398"></a>
<a name="line-399"></a><a name="Accessor"></a><span class='hs-comment'>-- | Used instead of 'Const' to report</span>
<a name="line-400"></a><a name="Accessor"></a><span class='hs-comment'>--</span>
<a name="line-401"></a><a name="Accessor"></a><span class='hs-comment'>-- @No instance of ('Control.Lens.Setter.Settable' 'Accessor')@</span>
<a name="line-402"></a><a name="Accessor"></a><span class='hs-comment'>--</span>
<a name="line-403"></a><a name="Accessor"></a><span class='hs-comment'>-- when the user attempts to misuse a 'Control.Lens.Setter.Setter' as a</span>
<a name="line-404"></a><a name="Accessor"></a><span class='hs-comment'>-- 'Control.Lens.Getter.Getter', rather than a monolithic unification error.</span>
<a name="line-405"></a><a name="Accessor"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Accessor</span> <span class='hs-varid'>r</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Accessor</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runAccessor</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>r</span> <span class='hs-layout'>}</span>
<a name="line-406"></a>
<a name="line-407"></a><a name="instance%20Functor%20(Accessor%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-408"></a> <span class='hs-varid'>fmap</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varid'>m</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Accessor</span> <span class='hs-varid'>m</span>
<a name="line-409"></a>
<a name="line-410"></a><a name="instance%20Applicative%20(Accessor%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monoid</span> <span class='hs-varid'>r</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Applicative</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-411"></a> <span class='hs-varid'>pure</span> <span class='hs-keyword'>_</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Accessor</span> <span class='hs-varid'>mempty</span>
<a name="line-412"></a> <span class='hs-conid'>Accessor</span> <span class='hs-varid'>a</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Accessor</span> <span class='hs-varid'>b</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Accessor</span> <span class='hs-layout'>(</span><span class='hs-varid'>mappend</span> <span class='hs-varid'>a</span> <span class='hs-varid'>b</span><span class='hs-layout'>)</span>
<a name="line-413"></a>
<a name="line-414"></a><a name="Effective"></a><span class='hs-comment'>-- | An 'Effective' 'Functor' ignores its argument and is isomorphic to a monad wrapped around a value.</span>
<a name="line-415"></a><a name="Effective"></a><span class='hs-comment'>--</span>
<a name="line-416"></a><a name="Effective"></a><span class='hs-comment'>-- That said, the monad is possibly rather unrelated to any 'Applicative' structure.</span>
<a name="line-417"></a><a name="Effective"></a><span class='hs-keyword'>class</span> <span class='hs-layout'>(</span><span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span><span class='hs-layout'>,</span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Effective</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-keyword'>where</span>
<a name="line-418"></a> <span class='hs-varid'>effective</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Isomorphic</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-419"></a>
<a name="line-420"></a><a name="ineffective"></a><span class='hs-comment'>-- | A convenient antonym that is used internally.</span>
<a name="line-421"></a><span class='hs-definition'>ineffective</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Effective</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Isomorphic</span> <span class='hs-varid'>k</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>k</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span>
<a name="line-422"></a><span class='hs-definition'>ineffective</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>from</span> <span class='hs-varid'>effective</span>
<a name="line-423"></a><span class='hs-comment'>{-# INLINE ineffective #-}</span>
<a name="line-424"></a>
<a name="line-425"></a><a name="instance%20Effective%20Identity%20r%20(Accessor%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Effective</span> <span class='hs-conid'>Identity</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-426"></a> <span class='hs-varid'>effective</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isomorphic</span> <span class='hs-layout'>(</span><span class='hs-conid'>Accessor</span> <span class='hs-varop'>.</span> <span class='hs-varid'>runIdentity</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Identity</span> <span class='hs-varop'>.</span> <span class='hs-varid'>runAccessor</span><span class='hs-layout'>)</span>
<a name="line-427"></a> <span class='hs-comment'>{-# INLINE effective #-}</span>
<a name="line-428"></a>
<a name="line-429"></a><a name="instance%20Effective%20m%20(Dual%20r)%20(Backwards%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Effective</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Effective</span> <span class='hs-varid'>m</span> <span class='hs-layout'>(</span><span class='hs-conid'>Dual</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-conid'>Backwards</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-430"></a> <span class='hs-varid'>effective</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isomorphic</span> <span class='hs-layout'>(</span><span class='hs-conid'>Backwards</span> <span class='hs-varop'>.</span> <span class='hs-varid'>effective</span> <span class='hs-varop'>.</span> <span class='hs-varid'>liftM</span> <span class='hs-varid'>getDual</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>liftM</span> <span class='hs-conid'>Dual</span> <span class='hs-varop'>.</span> <span class='hs-varid'>ineffective</span> <span class='hs-varop'>.</span> <span class='hs-varid'>forwards</span><span class='hs-layout'>)</span>
<a name="line-431"></a>
<a name="line-432"></a><a name="instance%20Effective%20m%20r%20(Effect%20m%20r)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Monad</span> <span class='hs-varid'>m</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Effective</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span> <span class='hs-layout'>(</span><span class='hs-conid'>Effect</span> <span class='hs-varid'>m</span> <span class='hs-varid'>r</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-433"></a> <span class='hs-varid'>effective</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>isomorphic</span> <span class='hs-conid'>Effect</span> <span class='hs-varid'>getEffect</span>
<a name="line-434"></a> <span class='hs-comment'>{-# INLINE effective #-}</span>
<a name="line-435"></a>
<a name="line-436"></a><a name="Folding"></a><span class='hs-comment'>-- | A 'Monoid' for a 'Gettable' 'Applicative'.</span>
<a name="line-437"></a><a name="Folding"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Folding</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Folding</span> <span class='hs-layout'>{</span> <span class='hs-varid'>getFolding</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-438"></a>
<a name="line-439"></a><a name="instance%20Monoid%20(Folding%20f%20a)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Monoid</span> <span class='hs-layout'>(</span><span class='hs-conid'>Folding</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-440"></a> <span class='hs-varid'>mempty</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Folding</span> <span class='hs-varid'>noEffect</span>
<a name="line-441"></a> <span class='hs-comment'>{-# INLINE mempty #-}</span>
<a name="line-442"></a> <span class='hs-conid'>Folding</span> <span class='hs-varid'>fr</span> <span class='hs-varop'>`mappend`</span> <span class='hs-conid'>Folding</span> <span class='hs-varid'>fs</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Folding</span> <span class='hs-layout'>(</span><span class='hs-varid'>fr</span> <span class='hs-varop'>*></span> <span class='hs-varid'>fs</span><span class='hs-layout'>)</span>
<a name="line-443"></a> <span class='hs-comment'>{-# INLINE mappend #-}</span>
<a name="line-444"></a>
<a name="line-445"></a><a name="noEffect"></a><span class='hs-comment'>-- | The 'mempty' equivalent for a 'Gettable' 'Applicative' 'Functor'.</span>
<a name="line-446"></a><span class='hs-definition'>noEffect</span> <span class='hs-keyglyph'>::</span> <span class='hs-layout'>(</span><span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Gettable</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span>
<a name="line-447"></a><span class='hs-definition'>noEffect</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>coerce</span> <span class='hs-varop'>$</span> <span class='hs-varid'>pure</span> <span class='hs-conid'>()</span>
<a name="line-448"></a><span class='hs-comment'>{-# INLINE noEffect #-}</span>
<a name="line-449"></a>
<a name="line-450"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-451"></a><span class='hs-comment'>-- Settables & Mutators</span>
<a name="line-452"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span>
<a name="line-453"></a>
<a name="line-454"></a><a name="Settable"></a><span class='hs-comment'>-- | Anything 'Settable' must be isomorphic to the 'Identity' 'Functor'.</span>
<a name="line-455"></a><a name="Settable"></a><span class='hs-keyword'>class</span> <span class='hs-conid'>Applicative</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Settable</span> <span class='hs-varid'>f</span> <span class='hs-keyword'>where</span>
<a name="line-456"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>f</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-varid'>a</span>
<a name="line-457"></a>
<a name="line-458"></a><a name="instance%20Settable%20Identity"></a><span class='hs-comment'>-- | so you can pass our a 'Control.Lens.Setter.Setter' into combinators from other lens libraries</span>
<a name="line-459"></a><a name="instance%20Settable%20Identity"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Settable</span> <span class='hs-conid'>Identity</span> <span class='hs-keyword'>where</span>
<a name="line-460"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runIdentity</span>
<a name="line-461"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-462"></a>
<a name="line-463"></a><a name="instance%20Settable%20(Backwards%20f)"></a><span class='hs-comment'>-- | 'Control.Lens.Fold.backwards'</span>
<a name="line-464"></a><a name="instance%20Settable%20(Backwards%20f)"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Settable</span> <span class='hs-varid'>f</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Settable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Backwards</span> <span class='hs-varid'>f</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-465"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>untainted</span> <span class='hs-varop'>.</span> <span class='hs-varid'>forwards</span>
<a name="line-466"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-467"></a>
<a name="line-468"></a><a name="instance%20Settable%20(Compose%20f%20g)"></a><span class='hs-keyword'>instance</span> <span class='hs-layout'>(</span><span class='hs-conid'>Settable</span> <span class='hs-varid'>f</span><span class='hs-layout'>,</span> <span class='hs-conid'>Settable</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=></span> <span class='hs-conid'>Settable</span> <span class='hs-layout'>(</span><span class='hs-conid'>Compose</span> <span class='hs-varid'>f</span> <span class='hs-varid'>g</span><span class='hs-layout'>)</span> <span class='hs-keyword'>where</span>
<a name="line-469"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>untainted</span> <span class='hs-varop'>.</span> <span class='hs-varid'>untainted</span> <span class='hs-varop'>.</span> <span class='hs-varid'>getCompose</span>
<a name="line-470"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-471"></a>
<a name="line-472"></a><a name="instance%20Settable%20Mutator"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Settable</span> <span class='hs-conid'>Mutator</span> <span class='hs-keyword'>where</span>
<a name="line-473"></a> <span class='hs-varid'>untainted</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>runMutator</span>
<a name="line-474"></a> <span class='hs-comment'>{-# INLINE untainted #-}</span>
<a name="line-475"></a>
<a name="line-476"></a><a name="Mutator"></a><span class='hs-comment'>-- | 'Mutator' is just a renamed 'Identity' functor to give better error</span>
<a name="line-477"></a><a name="Mutator"></a><span class='hs-comment'>-- messages when someone attempts to use a getter as a setter.</span>
<a name="line-478"></a><a name="Mutator"></a><span class='hs-comment'>--</span>
<a name="line-479"></a><a name="Mutator"></a><span class='hs-comment'>-- Most user code will never need to see this type.</span>
<a name="line-480"></a><a name="Mutator"></a><span class='hs-keyword'>newtype</span> <span class='hs-conid'>Mutator</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mutator</span> <span class='hs-layout'>{</span> <span class='hs-varid'>runMutator</span> <span class='hs-keyglyph'>::</span> <span class='hs-varid'>a</span> <span class='hs-layout'>}</span>
<a name="line-481"></a>
<a name="line-482"></a><a name="instance%20Functor%20Mutator"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Functor</span> <span class='hs-conid'>Mutator</span> <span class='hs-keyword'>where</span>
<a name="line-483"></a> <span class='hs-varid'>fmap</span> <span class='hs-varid'>f</span> <span class='hs-layout'>(</span><span class='hs-conid'>Mutator</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mutator</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-484"></a>
<a name="line-485"></a><a name="instance%20Applicative%20Mutator"></a><span class='hs-keyword'>instance</span> <span class='hs-conid'>Applicative</span> <span class='hs-conid'>Mutator</span> <span class='hs-keyword'>where</span>
<a name="line-486"></a> <span class='hs-varid'>pure</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mutator</span>
<a name="line-487"></a> <span class='hs-conid'>Mutator</span> <span class='hs-varid'>f</span> <span class='hs-varop'><*></span> <span class='hs-conid'>Mutator</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mutator</span> <span class='hs-layout'>(</span><span class='hs-varid'>f</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span>
<a name="line-488"></a>
</pre></body>
</html>