-
Notifications
You must be signed in to change notification settings - Fork 339
/
haskell-mode.el
1210 lines (1099 loc) · 52.5 KB
/
haskell-mode.el
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
;;; haskell-mode.el --- A Haskell editing mode -*- coding: utf-8; lexical-binding: t -*-
;; Copyright © 2003, 2004, 2005, 2006, 2007, 2008, 2016
;; Free Software Foundation, Inc
;; Copyright © 1992, 1997-1998 Simon Marlow, Graeme E Moss, and Tommy Thorn
;; Version: 17.5
;; Package-Requires: ((emacs "25.1"))
;; Keywords: haskell cabal ghc repl languages
;; URL: https://github.com/haskell/haskell-mode
;; This file is not part of GNU Emacs.
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; A major mode for editing Haskell (the functional programming
;; language, see URL `http://www.haskell.org') in Emacs.
;;
;; Some of its major features include:
;;
;; - syntax highlighting (font lock),
;;
;; - automatic indentation,
;;
;; - on-the-fly documentation,
;;
;; - interaction with inferior GHCi/Hugs instance,
;;
;; - scans declarations and places them in a menu.
;;
;; See URL `https://github.com/haskell/haskell-mode' and/or
;; Info node `(haskell-mode)Introduction' for more information.
;;
;; Use `M-x haskell-mode-view-news` (after Haskell Mode is installed)
;; to show information on recent changes in Haskell Mode.
;;; Change Log:
;; This mode is based on an editing mode by Simon Marlow 11/1/92
;; and heavily modified by Graeme E Moss and Tommy Thorn 7/11/98.
;;
;; Version 1.5:
;; Added autoload for haskell-indentation
;;
;; Version 1.43:
;; Various tweaks to doc strings and customization support from
;; Ville Skyttä <scop@xemacs.org>.
;;
;; Version 1.42:
;; Added autoload for GHCi inferior mode (thanks to Scott
;; Williams for the bug report and fix).
;;
;; Version 1.41:
;; Improved packaging, and made a couple more variables
;; interactively settable.
;;
;; Version 1.4:
;; Added GHCi mode from Chris Webb, and tidied up a little.
;;
;; Version 1.3:
;; The literate or non-literate style of a buffer is now indicated
;; by just the variable haskell-literate: nil, `bird', or `tex'.
;; For literate buffers with ambiguous style, the value of
;; haskell-literate-default is used.
;;
;; Version 1.2:
;; Separated off font locking, declaration scanning and simple
;; indentation, and made them separate modules. Modules can be
;; added easily now. Support for modules haskell-doc,
;; haskell-indent, and haskell-hugs. Literate and non-literate
;; modes integrated into one mode, and literate buffer indicated by
;; value of haskell-literate(-bird-style).
;;
;; Version 1.1:
;; Added support for declaration scanning under XEmacs via
;; func-menu. Moved operators to level two fontification.
;;
;; Version 1.0:
;; Added a nice indention support from Heribert Schuetz
;; <Heribert.Schuetz@informatik.uni-muenchen.de>:
;;
;; I have just hacked an Emacs Lisp function which you might prefer
;; to `indent-relative' in haskell-mode.el. See below. It is not
;; really Haskell-specific because it does not take into account
;; keywords like `do', `of', and `let' (where the layout rule
;; applies), but I already find it useful.
;;
;; Cleaned up the imenu support. Added support for literate scripts.
;;
;; Version 0.103 [HWL]:
;; From Hans Wolfgang Loidl <hwloidl@dcs.gla.ac.uk>:
;;
;; I (HWL) added imenu support by copying the appropriate functions
;; from hugs-mode. A menu-bar item "Declarations" is now added in
;; haskell mode. The new code, however, needs some clean-up.
;;
;; Version 0.102:
;;
;; Moved C-c C-c key binding to comment-region. Leave M-g M-g to do
;; the work. comment-start-skip is changed to comply with comment-start.
;;
;; Version 0.101:
;;
;; Altered indent-line-function to indent-relative.
;;
;; Version 0.100:
;;
;; First official release.
;;; Code:
(require 'haskell-customize)
(require 'ansi-color)
(require 'dabbrev)
(require 'compile)
(require 'etags)
(require 'flymake)
(require 'flymake-proc nil 'noerror)
(require 'outline)
(require 'cl-lib)
(require 'haskell-ghc-support)
(require 'haskell-complete-module)
(require 'haskell-align-imports)
(require 'haskell-lexeme)
(require 'haskell-sort-imports)
(require 'haskell-string)
(require 'haskell-indentation)
(require 'haskell-font-lock)
(require 'haskell-cabal)
;; All functions/variables start with `(literate-)haskell-'.
;; Version of mode.
(defconst haskell-version "16.2-git"
"The release version of `haskell-mode'.")
;;;###autoload
(defun haskell-version (&optional here)
"Show the `haskell-mode` version in the echo area.
With prefix argument HERE, insert it at point."
(interactive "P")
(let* ((haskell-mode-dir (ignore-errors
(file-name-directory (or (locate-library "haskell-mode") ""))))
(version (format "haskell-mode version %s (%s)"
haskell-version
haskell-mode-dir)))
(if here
(insert version)
(message "%s" version))))
;;;###autoload
(defun haskell-mode-view-news ()
"Display information on recent changes to haskell-mode."
(interactive)
(with-current-buffer (find-file-read-only (expand-file-name "NEWS" haskell-mode-pkg-base-dir))
(goto-char (point-min))
(outline-hide-sublevels 1)
(outline-next-visible-heading 1)
(outline-show-subtree)))
;; Are we looking at a literate script?
(defvar-local haskell-literate nil
"If not nil, the current buffer contains a literate Haskell script.
Possible values are: `bird' and `tex', for Bird-style and LaTeX-style
literate scripts respectively. Set by `haskell-mode' and
`haskell-literate-mode'. For an ambiguous literate buffer -- i.e. does
not contain either \"\\begin{code}\" or \"\\end{code}\" on a line on
its own, nor does it contain \">\" at the start of a line -- the value
of `haskell-literate-default' is used.")
(put 'haskell-literate 'safe-local-variable 'symbolp)
;; Default literate style for ambiguous literate buffers.
(defcustom haskell-literate-default 'bird
"Default value for `haskell-literate'.
Used if the style of a literate buffer is ambiguous. This variable should
be set to the preferred literate style."
:group 'haskell
:type '(choice (const bird) (const tex) (const nil)))
(defvar haskell-mode-map
(let ((map (make-sparse-keymap)))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Editing-specific commands
(define-key map (kbd "C-c C-,") 'haskell-mode-format-imports)
(define-key map [remap delete-indentation] 'haskell-delete-indentation)
(define-key map (kbd "C-c C-l") 'haskell-mode-enable-process-minor-mode)
(define-key map (kbd "C-c C-b") 'haskell-mode-enable-process-minor-mode)
(define-key map (kbd "C-c C-v") 'haskell-mode-enable-process-minor-mode)
(define-key map (kbd "C-c C-t") 'haskell-mode-enable-process-minor-mode)
(define-key map (kbd "C-c C-i") 'haskell-mode-enable-process-minor-mode)
(define-key map (kbd "C-c C-s") 'haskell-mode-toggle-scc-at-point)
map)
"Keymap used in `haskell-mode'.")
(defun haskell-mode-enable-process-minor-mode ()
"Tell the user to choose a minor mode for process interaction."
(interactive)
(error "Run `C-h f haskell-mode` for instruction how to setup a Haskell interaction mode."))
(easy-menu-define haskell-mode-menu haskell-mode-map
"Menu for the Haskell major mode."
;; Suggestions from Pupeno <pupeno@pupeno.com>:
;; - choose the underlying interpreter
;; - look up docs
`("Haskell"
["Indent line" indent-according-to-mode]
["(Un)Comment region" comment-region mark-active]
"---"
["Start interpreter" haskell-interactive-switch]
["Load file" haskell-process-load-file]
"---"
["Load tidy core" ghc-core-create-core]
"---"
["Doc mode" haskell-doc-mode
:style toggle :selected (and (boundp 'haskell-doc-mode) haskell-doc-mode)]
["Customize" (customize-group 'haskell)]
))
;; Procedurally generated (see Lexeme.hs in ghc).
;; This is a bit unsightly: it's generated by making a list of all
;; unicode characters whose Unicode general category ghc would
;; recognize as valid symbol (or identifier, below) constituent.
(defvar haskell--char-syntax-symbols
'((161 . 169) 172 (174 . 177) 180 (182 . 184) 191 215 247
(706 . 709) (722 . 735) (741 . 747) 749 (751 . 767) 885
894 (900 . 901) 903 1014 1154 (1370 . 1375) (1417 . 1418)
(1421 . 1423) 1470 1472 1475 1478 (1523 . 1524) (1542 . 1551)
1563 (1566 . 1567) (1642 . 1645) 1748 1758 1769 (1789 . 1790)
(1792 . 1805) (2038 . 2041) (2096 . 2110) 2142 (2404 . 2405)
2416 (2546 . 2547) (2554 . 2555) (2800 . 2801) 2928
(3059 . 3066) 3199 3449 3572 3647 3663 (3674 . 3675)
(3841 . 3863) (3866 . 3871) 3892 3894 3896 3973 (4030 . 4037)
(4039 . 4044) (4046 . 4058) (4170 . 4175) (4254 . 4255)
4347 (4960 . 4968) (5008 . 5017) 5120 (5741 . 5742)
(5867 . 5869) (5941 . 5942) (6100 . 6102) (6104 . 6107)
(6144 . 6154) 6464 (6468 . 6469) (6622 . 6623) (6624 . 6655)
(6686 . 6687) (6816 . 6822) (6824 . 6829) (7002 . 7018)
(7028 . 7036) (7164 . 7167) (7227 . 7231) (7294 . 7295)
(7360 . 7367) 7379 8125 (8127 . 8129) (8141 . 8143)
(8157 . 8159) (8173 . 8175) (8189 . 8190) (8208 . 8215)
(8224 . 8231) (8240 . 8248) (8251 . 8260) (8263 . 8286)
(8314 . 8316) (8330 . 8332) (8352 . 8381) (8448 . 8449)
(8451 . 8454) (8456 . 8457) 8468 (8470 . 8472) (8478 . 8483)
8485 8487 8489 8494 (8506 . 8507) (8512 . 8516) (8522 . 8525)
8527 (8592 . 8703) (8704 . 8959) (8960 . 8967) (8972 . 9000)
(9003 . 9210) (9216 . 9254) (9280 . 9290) (9372 . 9449)
(9472 . 9599) (9600 . 9631) (9632 . 9727) (9728 . 9983)
(9984 . 10087) (10132 . 10175) (10176 . 10180) (10183 . 10213)
(10224 . 10239) (10240 . 10495) (10496 . 10623) (10624 . 10626)
(10649 . 10711) (10716 . 10747) (10750 . 10751) (10752 . 11007)
(11008 . 11123) (11126 . 11157) (11160 . 11193) (11197 . 11208)
(11210 . 11217) (11493 . 11498) (11513 . 11516) (11518 . 11519)
11632 (11776 . 11777) (11782 . 11784) 11787 (11790 . 11803)
(11806 . 11807) (11818 . 11822) (11824 . 11841) (11904 . 11929)
(11931 . 12019) (12032 . 12245) (12272 . 12283) (12289 . 12292)
(12306 . 12307) 12316 12320 12336 (12342 . 12343)
(12349 . 12351) (12443 . 12444) 12448 12539 (12688 . 12689)
(12694 . 12703) (12736 . 12771) (12800 . 12830) (12842 . 12871)
12880 (12896 . 12927) (12938 . 12976) (12992 . 13054)
(13056 . 13311) (19904 . 19967) (42128 . 42182) (42238 . 42239)
(42509 . 42511) 42611 42622 (42738 . 42743) (42752 . 42774)
(42784 . 42785) (42889 . 42890) (43048 . 43051) (43062 . 43065)
(43124 . 43127) (43214 . 43215) (43256 . 43258) (43310 . 43311)
43359 (43457 . 43469) (43486 . 43487) (43612 . 43615)
(43639 . 43641) (43742 . 43743) (43760 . 43761) 43867
44011 64297 (64434 . 64449) (65020 . 65021) (65040 . 65046)
65049 (65072 . 65076) (65093 . 65094) (65097 . 65103)
(65104 . 65106) (65108 . 65112) (65119 . 65126) (65128 . 65131)
(65281 . 65287) (65290 . 65295) (65306 . 65312) 65340
(65342 . 65344) 65372 65374 65377 (65380 . 65381)
(65504 . 65510) (65512 . 65518) (65532 . 65533) (65792 . 65794)
(65847 . 65855) (65913 . 65929) 65932 (65936 . 65947)
65952 (66000 . 66044) 66463 66512 66927 67671 (67703 . 67704)
67871 67903 (68176 . 68184) 68223 68296 (68336 . 68342)
(68409 . 68415) (68505 . 68508) (69703 . 69709) (69819 . 69820)
(69822 . 69825) (69952 . 69955) (70004 . 70005) (70085 . 70088)
70093 (70200 . 70205) 70854 (71105 . 71113) (71233 . 71235)
(74864 . 74868) (92782 . 92783) 92917 (92983 . 92991)
(92996 . 92997) 113820 113823 (118784 . 119029) (119040 . 119078)
(119081 . 119140) (119146 . 119148) (119171 . 119172)
(119180 . 119209) (119214 . 119261) (119296 . 119361)
119365 (119552 . 119638) 120513 120539 120571 120597
120629 120655 120687 120713 120745 120771 (126704 . 126705)
(126976 . 127019) (127024 . 127123) (127136 . 127150)
(127153 . 127167) (127169 . 127183) (127185 . 127221)
(127248 . 127278) (127280 . 127339) (127344 . 127386)
(127462 . 127487) (127488 . 127490) (127504 . 127546)
(127552 . 127560) (127568 . 127569) (127744 . 127788)
(127792 . 127869) (127872 . 127950) (127956 . 127991)
(128000 . 128254) (128256 . 128330) (128336 . 128377)
(128379 . 128419) (128421 . 128511) (128512 . 128578)
(128581 . 128591) (128592 . 128639) (128640 . 128719)
(128736 . 128748) (128752 . 128755) (128768 . 128883)
(128896 . 128980) (129024 . 129035) (129040 . 129095)
(129104 . 129113) (129120 . 129159) (129168 . 129197)))
(defvar haskell--char-syntax-identifiers
'(170
(178 . 179) 181 (185 . 186) (188 . 190) (192 . 214) (216 . 246)
(248 . 255) (256 . 383) (384 . 591) (592 . 687) (880 . 883)
(886 . 887) (891 . 893) 895 902 (904 . 906) 908 (910 . 929) (931 . 1013)
(1015 . 1023) (1024 . 1153) (1162 . 1279) (1280 . 1327)
(1329 . 1366) (1377 . 1415) (1488 . 1514) (1520 . 1522) (1568 . 1599)
(1601 . 1610) (1632 . 1641) (1646 . 1647) (1649 . 1747) 1749
(1774 . 1788) 1791 1808 (1810 . 1839) (1869 . 1871) (1872 . 1919)
(1920 . 1957) 1969 (1984 . 2026) (2048 . 2069) (2112 . 2136) (2208 . 2226)
(2308 . 2361) 2365 2384 (2392 . 2401) (2406 . 2415) (2418 . 2431)
2432 (2437 . 2444) (2447 . 2448) (2451 . 2472) (2474 . 2480)
2482 (2486 . 2489) 2493 2510 (2524 . 2525) (2527 . 2529) (2534 . 2545)
(2548 . 2553) (2565 . 2570) (2575 . 2576) (2579 . 2600)
(2602 . 2608) (2610 . 2611) (2613 . 2614) (2616 . 2617) (2649 . 2652)
2654 (2662 . 2671) (2674 . 2676) (2693 . 2701) (2703 . 2705)
(2707 . 2728) (2730 . 2736) (2738 . 2739) (2741 . 2745) 2749 2768
(2784 . 2785) (2790 . 2799) (2821 . 2828) (2831 . 2832) (2835 . 2856)
(2858 . 2864) (2866 . 2867) (2869 . 2873) 2877 (2908 . 2909)
(2911 . 2913) (2918 . 2927) (2929 . 2935) 2947 (2949 . 2954) (2958 . 2960)
(2962 . 2965) (2969 . 2970) 2972 (2974 . 2975) (2979 . 2980)
(2984 . 2986) (2990 . 3001) 3024 (3046 . 3058) (3077 . 3084) (3086 . 3088)
(3090 . 3112) (3114 . 3129) 3133 (3160 . 3161) (3168 . 3169)
(3174 . 3183) (3192 . 3198) (3205 . 3212) (3214 . 3216) (3218 . 3240)
(3242 . 3251) (3253 . 3257) 3261 3294 (3296 . 3297) (3302 . 3311)
(3313 . 3314) (3333 . 3340) (3342 . 3344) (3346 . 3386) 3389
3406 (3424 . 3425) (3430 . 3445) (3450 . 3455) (3461 . 3478) (3482 . 3505)
(3507 . 3515) 3517 (3520 . 3526) (3558 . 3567) (3585 . 3632)
(3634 . 3635) (3648 . 3653) (3664 . 3673) (3713 . 3714) 3716 (3719 . 3720)
3722 3725 (3732 . 3735) (3737 . 3743) (3745 . 3747) 3749
3751 (3754 . 3755) (3757 . 3760) (3762 . 3763) 3773 (3776 . 3780)
(3792 . 3801) (3804 . 3807) 3840 (3872 . 3891) (3904 . 3911) (3913 . 3948)
(3976 . 3980) (4096 . 4138) (4159 . 4169) (4176 . 4181)
(4186 . 4189) 4193 (4197 . 4198) (4206 . 4208) (4213 . 4225) 4238
(4240 . 4249) (4256 . 4293) 4295 4301 (4304 . 4346) (4349 . 4351)
(4352 . 4607) (4608 . 4680) (4682 . 4685) (4688 . 4694) 4696 (4698 . 4701)
(4704 . 4744) (4746 . 4749) (4752 . 4784) (4786 . 4789)
(4792 . 4798) 4800 (4802 . 4805) (4808 . 4822) (4824 . 4880) (4882 . 4885)
(4888 . 4954) (4969 . 4988) (4992 . 5007) (5024 . 5108)
(5121 . 5740) (5743 . 5759) (5761 . 5786) (5792 . 5866) (5873 . 5880)
(5888 . 5900) (5902 . 5905) (5920 . 5937) (5952 . 5969)
(5984 . 5996) (5998 . 6000) (6016 . 6067) 6108 (6112 . 6121) (6128 . 6137)
(6160 . 6169) (6176 . 6210) (6212 . 6263) (6272 . 6312) 6314
(6320 . 6389) (6400 . 6430) (6470 . 6479) (6480 . 6509) (6512 . 6516)
(6528 . 6571) (6593 . 6599) (6608 . 6618) (6656 . 6678)
(6688 . 6740) (6784 . 6793) (6800 . 6809) (6917 . 6963) (6981 . 6987)
(6992 . 7001) (7043 . 7072) (7086 . 7103) (7104 . 7141)
(7168 . 7203) (7232 . 7241) (7245 . 7247) (7248 . 7287) (7401 . 7404)
(7406 . 7409) (7413 . 7414) (7424 . 7467) (7531 . 7543)
(7545 . 7551) (7552 . 7578) (7680 . 7935) (7936 . 7957) (7960 . 7965)
(7968 . 8005) (8008 . 8013) (8016 . 8023) 8025 8027 8029
(8031 . 8061) (8064 . 8116) (8118 . 8124) 8126 (8130 . 8132) (8134 . 8140)
(8144 . 8147) (8150 . 8155) (8160 . 8172) (8178 . 8180)
(8182 . 8188) 8304 (8308 . 8313) (8320 . 8329) 8450 8455 (8458 . 8467)
8469 (8473 . 8477) 8484 8486 8488 (8490 . 8493) (8495 . 8505)
(8508 . 8511) (8517 . 8521) 8526 (8528 . 8543) (8579 . 8580)
8585 (9312 . 9371) (9450 . 9471) (10102 . 10131) (11264 . 11310)
(11312 . 11358) (11360 . 11387) (11390 . 11391) (11392 . 11492)
(11499 . 11502) (11506 . 11507) 11517 (11520 . 11557) 11559 11565
(11568 . 11623) (11648 . 11670) (11680 . 11686) (11688 . 11694)
(11696 . 11702) (11704 . 11710) (11712 . 11718) (11720 . 11726)
(11728 . 11734) (11736 . 11742) 12294 12348 (12353 . 12438) 12447
(12449 . 12538) 12543 (12549 . 12589) (12593 . 12686) (12690 . 12693)
(12704 . 12730) (12784 . 12799) (12832 . 12841) (12872 . 12879)
(12881 . 12895) (12928 . 12937) (12977 . 12991) (13312 . 19893)
(19968 . 40908) (40960 . 40980) (40982 . 42124) (42192 . 42231)
(42240 . 42507) (42512 . 42539) (42560 . 42606) (42624 . 42651)
(42656 . 42725) (42786 . 42863) (42865 . 42887) (42891 . 42894)
(42896 . 42925) (42928 . 42929) 42999 (43002 . 43007)
(43008 . 43009) (43011 . 43013) (43015 . 43018) (43020 . 43042)
(43056 . 43061) (43072 . 43123) (43138 . 43187) (43216 . 43225)
(43250 . 43255) 43259 (43264 . 43301) (43312 . 43334) (43360 . 43388)
(43396 . 43442) (43472 . 43481) (43488 . 43492) (43495 . 43518)
(43520 . 43560) (43584 . 43586) (43588 . 43595) (43600 . 43609)
(43616 . 43631) (43633 . 43638) 43642 (43646 . 43647)
(43648 . 43695) 43697 (43701 . 43702) (43705 . 43709) 43712 43714
(43739 . 43740) (43744 . 43754) 43762 (43777 . 43782) (43785 . 43790)
(43793 . 43798) (43808 . 43814) (43816 . 43822) (43824 . 43866)
(43876 . 43877) (43968 . 44002) (44016 . 44025) (44032 . 55203)
(55216 . 55238) (55243 . 55291) (63744 . 64109) (64112 . 64217)
(64256 . 64262) (64275 . 64279) 64285 (64287 . 64296)
(64298 . 64310) (64312 . 64316) 64318 (64320 . 64321) (64323 . 64324)
(64326 . 64335) (64336 . 64433) (64467 . 64829) (64848 . 64911)
(64914 . 64967) (65008 . 65019) (65136 . 65140) (65142 . 65276)
(65296 . 65305) (65313 . 65338) (65345 . 65370) (65382 . 65391)
(65393 . 65437) (65440 . 65470) (65474 . 65479) (65482 . 65487)
(65490 . 65495) (65498 . 65500) (65536 . 65547) (65549 . 65574)
(65576 . 65594) (65596 . 65597) (65599 . 65613) (65616 . 65629)
(65664 . 65786) (65799 . 65843) (65909 . 65912) (65930 . 65931)
(66176 . 66204) (66208 . 66256) (66273 . 66299) (66304 . 66339)
(66352 . 66368) (66370 . 66377) (66384 . 66421) (66432 . 66461)
(66464 . 66499) (66504 . 66511) (66560 . 66639) (66640 . 66687)
(66688 . 66717) (66720 . 66729) (66816 . 66855) (66864 . 66915)
(67072 . 67382) (67392 . 67413) (67424 . 67431) (67584 . 67589)
67592 (67594 . 67637) (67639 . 67640) 67644 67647 (67648 . 67669)
(67672 . 67679) (67680 . 67702) (67705 . 67711) (67712 . 67742)
(67751 . 67759) (67840 . 67867) (67872 . 67897) (67968 . 67999)
(68000 . 68023) (68030 . 68031) 68096 (68112 . 68115)
(68117 . 68119) (68121 . 68147) (68160 . 68167) (68192 . 68222)
(68224 . 68255) (68288 . 68295) (68297 . 68324) (68331 . 68335)
(68352 . 68405) (68416 . 68437) (68440 . 68447) (68448 . 68466)
(68472 . 68479) (68480 . 68497) (68521 . 68527) (68608 . 68680)
(69216 . 69246) (69635 . 69687) (69714 . 69743) (69763 . 69807)
(69840 . 69864) (69872 . 69881) (69891 . 69926) (69942 . 69951)
(69968 . 70002) 70006 (70019 . 70066) (70081 . 70084) (70096 . 70106)
(70113 . 70132) (70144 . 70161) (70163 . 70187) (70320 . 70366)
(70384 . 70393) (70405 . 70412) (70415 . 70416) (70419 . 70440)
(70442 . 70448) (70450 . 70451) (70453 . 70457) 70461
(70493 . 70497) (70784 . 70831) (70852 . 70853) 70855 (70864 . 70873)
(71040 . 71086) (71168 . 71215) 71236 (71248 . 71257)
(71296 . 71338) (71360 . 71369) (71840 . 71922) 71935 (72384 . 72440)
(73728 . 74648) (77824 . 78894) (92160 . 92728) (92736 . 92766)
(92768 . 92777) (92880 . 92909) (92928 . 92975) (93008 . 93017)
(93019 . 93025) (93027 . 93047) (93053 . 93071) (93952 . 94020)
94032 (110592 . 110593) (113664 . 113770) (113776 . 113788)
(113792 . 113800) (113808 . 113817) (119648 . 119665) (119808 . 119892)
(119894 . 119964) (119966 . 119967) 119970 (119973 . 119974)
(119977 . 119980) (119982 . 119993) 119995 (119997 . 120003)
(120005 . 120069) (120071 . 120074) (120077 . 120084)
(120086 . 120092) (120094 . 120121) (120123 . 120126) (120128 . 120132)
120134 (120138 . 120144) (120146 . 120485) (120488 . 120512)
(120514 . 120538) (120540 . 120570) (120572 . 120596)
(120598 . 120628) (120630 . 120654) (120656 . 120686) (120688 . 120712)
(120714 . 120744) (120746 . 120770) (120772 . 120779)
(120782 . 120831) (124928 . 125124) (125127 . 125135) (126464 . 126467)
(126469 . 126495) (126497 . 126498) 126500 126503 (126505 . 126514)
(126516 . 126519) 126521 126523 126530 126535 126537
126539 (126541 . 126543) (126545 . 126546) 126548 126551 126553
126555 126557 126559 (126561 . 126562) 126564 (126567 . 126570)
(126572 . 126578) (126580 . 126583) (126585 . 126588) 126590 (126592 . 126601)
(126603 . 126619) (126625 . 126627) (126629 . 126633)
(126635 . 126651) (127232 . 127244) (131072 . 173782) (173824 . 177972)
(177984 . 178205) (194560 . 195101)))
;; Syntax table.
(defvar haskell-mode-syntax-table
(let ((table (make-syntax-table)))
(modify-syntax-entry ?\ " " table)
(modify-syntax-entry ?\t " " table)
(modify-syntax-entry ?\" "\"" table)
(modify-syntax-entry ?\' "_" table)
(modify-syntax-entry ?_ "_" table)
(modify-syntax-entry ?\( "()" table)
(modify-syntax-entry ?\) ")(" table)
(modify-syntax-entry ?\[ "(]" table)
(modify-syntax-entry ?\] ")[" table)
(modify-syntax-entry ?\{ "(}1nb" table)
(modify-syntax-entry ?\} "){4nb" table)
(modify-syntax-entry ?- "< 123" table)
(modify-syntax-entry ?\n ">" table)
(modify-syntax-entry ?\` "$`" table)
(mapc (lambda (x)
(modify-syntax-entry x "." table))
"!#$%&*+./:<=>?@^|~,;\\")
;; Haskell symbol characters are treated as punctuation because
;; they are not able to form identifiers with word constituent 'w'
;; class characters.
(dolist (charcodes haskell--char-syntax-symbols)
(modify-syntax-entry charcodes "." table))
;; ... and for identifier characters
(dolist (charcodes haskell--char-syntax-identifiers)
(modify-syntax-entry charcodes "w" table))
table)
"Syntax table used in Haskell mode.")
(defun haskell-syntax-propertize (begin end)
(save-excursion
(when haskell-literate
(goto-char begin)
;; Algorithm (first matching rule wins):
;; - current line is latex code if previous non-empty line was
;; latex code or was \begin{code} and current line is not
;; \end{code}
;; - current line is bird code if it starts with >
;; - else literate comment
(let ((previous-line-latex-code
(catch 'return
(save-excursion
(when (= (forward-line -1) 0)
(while (looking-at-p "^[\t ]*$")
(unless (= (forward-line -1) 0)
(throw 'return nil)))
(or
(and
(not (equal (string-to-syntax "<") (syntax-after (point))))
(not (looking-at-p "^>")))
(looking-at-p "^\\\\begin{code}[\t ]*$")))))))
(while (< (point) end)
(unless (looking-at-p "^[\t ]*$")
(if previous-line-latex-code
(if (looking-at-p "^\\\\end{code}[\t ]*$")
(progn
(put-text-property (point) (1+ (point)) 'syntax-table (string-to-syntax "<"))
(setq previous-line-latex-code nil))
;; continue latex-code
)
(if (looking-at-p "^>")
;; this is a whitespace
(put-text-property (point) (1+ (point)) 'syntax-table (string-to-syntax "-"))
;; this is a literate comment
(progn
(put-text-property (point) (1+ (point)) 'syntax-table (string-to-syntax "<"))
(when (looking-at-p "^\\\\begin{code}[\t ]*$")
(setq previous-line-latex-code t))))))
(forward-line 1))))
(goto-char begin)
(let ((ppss (syntax-ppss)))
(when (nth 4 ppss)
;; go to the end of a comment, there is nothing to see inside
;; a comment so we might as well just skip over it
;; immediately
(setq ppss (parse-partial-sexp (point) (point-max) nil nil ppss
'syntax-table)))
(when (nth 8 ppss)
;; go to the beginning of a comment or string
(goto-char (nth 8 ppss))
(when (equal ?| (nth 3 ppss))
;; if this is a quasi quote we need to backtrack even more
;; to the opening bracket
(skip-chars-backward "^[")
(goto-char (1- (point)))))
(while (< (point) end)
(let
((token-kind (haskell-lexeme-looking-at-token)))
(cond
((equal token-kind 'qsymid)
(when (member
(haskell-lexeme-classify-by-first-char (char-after (match-beginning 1)))
'(varsym consym))
;; we have to neutralize potential comments here
(put-text-property (match-beginning 1) (match-end 1) 'syntax-table (string-to-syntax "."))))
((equal token-kind 'number)
(put-text-property (match-beginning 0) (match-end 0) 'syntax-table (string-to-syntax "w")))
((equal token-kind 'char)
(save-excursion
(goto-char (match-beginning 2))
(let ((limit (match-end 2)))
(save-match-data
(while (re-search-forward "\"" limit t)
(put-text-property (match-beginning 0) (match-end 0) 'syntax-table (string-to-syntax ".")))))
;; Place a generic string delimeter only when an open
;; quote is closed by end-of-line Emacs acts strangely
;; when a generic delimiter is not closed so in case
;; string ends at the end of the buffer we will use
;; plain string
(if (and (not (match-beginning 3))
(not (equal (match-end 2) (point-max))))
(progn
(put-text-property (match-beginning 1) (match-end 1) 'syntax-table (string-to-syntax "|"))
(put-text-property (match-end 2 ) (1+ (match-end 2)) 'syntax-table (string-to-syntax "|")))
(put-text-property (match-beginning 1) (match-end 1) 'syntax-table (string-to-syntax "\""))
(when (not (equal (match-end 2) (point-max)))
(put-text-property (match-end 2 ) (1+ (match-end 2)) 'syntax-table (string-to-syntax "\""))))))
((equal token-kind 'string)
(save-excursion
(goto-char (match-beginning 2))
(let ((limit (match-end 2)))
(save-match-data
(while (re-search-forward "\"" limit t)
(put-text-property (match-beginning 0) (match-end 0) 'syntax-table (string-to-syntax ".")))))
;; Place a generic string delimeter only when an open
;; quote is closed by end-of-line Emacs acts strangely
;; when a generic delimiter is not closed so in case
;; string ends at the end of the buffer we will use
;; plain string
(when (and (not (match-beginning 3))
(not (equal (match-end 2) (point-max))))
(put-text-property (match-beginning 1) (match-end 1) 'syntax-table (string-to-syntax "|"))
(put-text-property (match-end 2 ) (1+ (match-end 2)) 'syntax-table (string-to-syntax "|")))))
((equal token-kind 'template-haskell-quasi-quote)
(put-text-property (match-beginning 2) (match-end 2) 'syntax-table (string-to-syntax "\""))
(when (match-beginning 4)
(put-text-property (match-beginning 4) (match-end 4) 'syntax-table (string-to-syntax "\"")))
(save-excursion
(goto-char (match-beginning 3))
(let ((limit (match-end 3)))
(save-match-data
(while (re-search-forward "\"" limit t)
(put-text-property (match-beginning 0) (match-end 0) 'syntax-table (string-to-syntax "."))))))))
(if token-kind
(goto-char (match-end 0))
(goto-char end)))))))
(defun haskell-ident-at-point ()
"Return the identifier near point going backward or nil if none found.
May return a qualified name."
(let ((reg (haskell-ident-pos-at-point)))
(when reg
(buffer-substring-no-properties (car reg) (cdr reg)))))
(defun haskell-spanable-pos-at-point ()
"Like `haskell-ident-pos-at-point', but includes any surrounding backticks."
(save-excursion
(let ((pos (haskell-ident-pos-at-point)))
(when pos
(cl-destructuring-bind (start . end) pos
(if (and (eq ?` (char-before start))
(eq ?` (char-after end)))
(cons (- start 1) (+ end 1))
(cons start end)))))))
(defun haskell-ident-pos-at-point ()
"Return the span of the identifier near point going backward.
Returns nil if no identifier found or point is inside string or
comment. May return a qualified name."
(when (not (nth 8 (syntax-ppss)))
;; Do not handle comments and strings
(let (start end)
;; Initial point position is non-deterministic, it may occur anywhere
;; inside identifier span, so the approach is:
;; - first try go left and find left boundary
;; - then try go right and find right boundary
;;
;; In both cases assume the longest path, e.g. when going left take into
;; account than point may occur at the end of identifier, when going right
;; take into account that point may occur at the beginning of identifier.
;;
;; We should handle `.` character very careful because it is heavily
;; overloaded. Examples of possible cases:
;; Control.Monad.>>= -- delimiter
;; Control.Monad.when -- delimiter
;; Data.Aeson..: -- delimiter and operator symbol
;; concat.map -- composition function
;; .? -- operator symbol
(save-excursion
;; First, skip whitespace if we're on it, moving point to last
;; identifier char. That way, if we're at "map ", we'll see the word
;; "map".
(when (and (eolp)
(not (bolp)))
(backward-char))
(when (and (not (eobp))
(eq (char-syntax (char-after)) ? ))
(skip-chars-backward " \t")
(backward-char))
;; Now let's try to go left.
(save-excursion
(if (not (haskell-mode--looking-at-varsym))
;; Looking at non-operator char, this is quite simple
(progn
(skip-syntax-backward "w_")
;; Remember position
(setq start (point)))
;; Looking at operator char.
(while (and (not (bobp))
(haskell-mode--looking-at-varsym))
;; skip all operator chars backward
(setq start (point))
(backward-char))
;; Extra check for case when reached beginning of the buffer.
(when (haskell-mode--looking-at-varsym)
(setq start (point))))
;; Slurp qualification part if present. If identifier is qualified in
;; case of non-operator point will stop before `.` dot, but in case of
;; operator it will stand at `.` delimiting dot. So if we're looking
;; at `.` let's step one char forward and try to get qualification
;; part.
(goto-char start)
(when (looking-at-p (rx "."))
(forward-char))
(let ((pos (haskell-mode--skip-qualification-backward)))
(when pos
(setq start pos))))
;; Finally, let's try to go right.
(save-excursion
;; Try to slurp qualification part first.
(skip-syntax-forward "w_")
(setq end (point))
(while (and (looking-at (rx "." upper))
(not (zerop (progn (forward-char)
(skip-syntax-forward "w_")))))
(setq end (point)))
;; If point was at non-operator we already done, otherwise we need an
;; extra check.
(while (haskell-mode--looking-at-varsym)
(forward-char)
(setq end (point))))
(when (not (= start end))
(cons start end))))))
(defun haskell-mode--looking-at-varsym ()
"Return t when point stands at operator symbol."
(when (not (eobp))
(let ((lex (haskell-lexeme-classify-by-first-char (char-after))))
(or (eq lex 'varsym)
(eq lex 'consym)))))
(defun haskell-mode--skip-qualification-backward ()
"Skip qualified part of identifier backward.
Expects point stands *after* delimiting dot.
Returns beginning position of qualified part or nil if no qualified part found."
(when (not (and (bobp)
(looking-at (rx bol))))
(let ((case-fold-search nil)
pos)
(while (and (eq (char-before) ?.)
(progn (backward-char)
(not (zerop (skip-syntax-backward "w'"))))
(skip-syntax-forward "'")
(looking-at "[[:upper:]]"))
(setq pos (point)))
pos)))
(defun haskell-delete-indentation (&optional arg)
"Like `delete-indentation' but ignoring Bird-style \">\".
Prefix ARG is handled as per `delete-indentation'."
(interactive "*P")
(let ((fill-prefix (or fill-prefix (if (eq haskell-literate 'bird) ">"))))
(delete-indentation arg)))
(defvar electric-pair-inhibit-predicate)
(declare-function electric-pair-default-inhibit "elec-pair")
(defun haskell-mode--inhibit-bracket-inside-comment-or-default (ch)
"An `electric-pair-mode' inhibit function for character CH."
(or (nth 4 (syntax-ppss))
(funcall #'electric-pair-default-inhibit ch)))
;; The main mode functions
(defcustom haskell-mode-hook '(haskell-indentation-mode interactive-haskell-mode)
"List of functions to run after `haskell-mode' is enabled.
Use to enable minor modes coming with `haskell-mode' or run an
arbitrary function.
Note that `haskell-indentation-mode' and `haskell-indent-mode' should not be
run at the same time."
:group 'haskell
:type 'hook
:options '(capitalized-words-mode
flyspell-prog-mode
haskell-decl-scan-mode
haskell-indent-mode
haskell-indentation-mode
highlight-uses-mode
imenu-add-menubar-index
interactive-haskell-mode
turn-on-haskell-unicode-input-method))
;;;###autoload
(define-derived-mode haskell-mode prog-mode "Haskell"
"Major mode for editing Haskell programs.
\\<haskell-mode-map>
Literate Haskell scripts are supported via `haskell-literate-mode'.
The variable `haskell-literate' indicates the style of the script in the
current buffer. See the documentation on this variable for more details.
Use `haskell-version' to find out what version of Haskell mode you are
currently using.
Additional Haskell mode modules can be hooked in via `haskell-mode-hook'.
Indentation modes:
`haskell-indentation-mode', Kristof Bastiaensen, Gergely Risko
Intelligent semi-automatic indentation Mk2
`haskell-indent-mode', Guy Lapalme
Intelligent semi-automatic indentation.
Interaction modes:
`interactive-haskell-mode'
Interact with per-project GHCi processes through a REPL and
directory-aware sessions.
Other modes:
`haskell-decl-scan-mode', Graeme E Moss
Scans top-level declarations, and places them in a menu.
`haskell-doc-mode', Hans-Wolfgang Loidl
Sets up eldoc to echo types of functions or syntax of keywords
when the cursor is idle.
To activate a minor-mode, simply run the interactive command. For
example, `M-x haskell-doc-mode'. Run it again to disable it.
To enable a mode for every `haskell-mode' buffer, add a hook in
your Emacs configuration. To do that you can customize
`haskell-mode-hook' or add lines to your .emacs file. For
example, to enable `interactive-haskell-mode', use the following:
(add-hook \\='haskell-mode-hook \\='interactive-haskell-mode)
Minor modes that work well with `haskell-mode':
- `smerge-mode': show and work with diff3 conflict markers used
by git, svn and other version control systems."
:group 'haskell
(when (version< emacs-version "25.1")
(error "haskell-mode requires at least Emacs 25.1"))
;; paragraph-{start,separate} should treat comments as paragraphs as well.
(setq-local paragraph-start (concat " *{-\\([^#]\\|$\\)\\| *-- |\\|" page-delimiter))
(setq-local paragraph-separate (concat " *$\\| *\\({-\\([^#]\\|$\\)\\|\\([^#]\\|^\\)-}\\) *$\\|" page-delimiter))
(setq-local fill-paragraph-function 'haskell-fill-paragraph)
;; (setq-local adaptive-fill-function 'haskell-adaptive-fill)
(setq-local comment-start "--")
(setq-local comment-padding 1)
(setq-local comment-start-skip "[-{]-[ \t]*")
(setq-local comment-end "")
(setq-local comment-end-skip "[ \t]*\\(-}\\|\\s>\\)")
(setq-local forward-sexp-function #'haskell-forward-sexp)
(setq-local parse-sexp-ignore-comments nil)
(setq-local syntax-propertize-function #'haskell-syntax-propertize)
;; Set things up for imenu.
(setq-local imenu-create-index-function 'haskell-ds-create-imenu-index)
;; Set things up for font-lock.
(setq-local font-lock-defaults
'((haskell-font-lock-keywords)
nil nil nil nil
(font-lock-syntactic-face-function
. haskell-syntactic-face-function)
;; Get help from font-lock-syntactic-keywords.
(parse-sexp-lookup-properties . t)
(font-lock-extra-managed-props . (composition haskell-type))))
;; Preprocessor definitions can have backslash continuations
(setq-local font-lock-multiline t)
;; Haskell's layout rules mean that TABs have to be handled with extra care.
;; The safer option is to avoid TABs. The second best is to make sure
;; TABs stops are 8 chars apart, as mandated by the Haskell Report. --Stef
(setq-local indent-tabs-mode nil)
(setq-local tab-width 8)
(setq-local comment-auto-fill-only-comments t)
;; Haskell is not generally suitable for electric indentation, since
;; there is no unambiguously correct indent level for any given line.
(when (boundp 'electric-indent-inhibit)
(setq electric-indent-inhibit t))
;; dynamic abbrev support: recognize Haskell identifiers
;; Haskell is case-sensitive language
(setq-local dabbrev-case-fold-search nil)
(setq-local dabbrev-case-distinction nil)
(setq-local dabbrev-case-replace nil)
(setq-local dabbrev-abbrev-char-regexp "\\sw\\|[.]")
(setq haskell-literate nil)
(add-hook 'before-save-hook 'haskell-mode-before-save-handler nil t)
(add-hook 'after-save-hook 'haskell-mode-after-save-handler nil t)
;; provide non-interactive completion function
(add-hook 'completion-at-point-functions
'haskell-completions-completion-at-point
nil
t)
;; Avoid Emacs 25 bug with electric-pair inside comments
(when (eq 25 emacs-major-version)
(setq-local electric-pair-inhibit-predicate 'haskell-mode--inhibit-bracket-inside-comment-or-default))
(haskell-indentation-mode))
(defun haskell-fill-paragraph (justify)
(save-excursion
;; Fill paragraph should only work in comments.
;; The -- comments are handled properly by default
;; The {- -} comments need some extra love.
(let* ((syntax-values (syntax-ppss))
(comment-num (nth 4 syntax-values)))
(cond
((eq t comment-num)
;; standard fill works wonders inside a non-nested comment
(fill-comment-paragraph justify))
((integerp comment-num)
;; we are in a nested comment. lets narrow to comment content
;; and use plain paragraph fill for that
(let* ((comment-start-point (nth 8 syntax-values))
(comment-end-point
(save-excursion
(goto-char comment-start-point)
(forward-sexp)
;; Find end of any comment even if forward-sexp
;; fails to find the right braces.
(backward-char 3)
(re-search-forward "[ \t]?-}" nil t)
(match-beginning 0)))
(fill-start (+ 2 comment-start-point))
(fill-end comment-end-point)
(fill-paragraph-handle-comment nil))
(save-restriction
(narrow-to-region fill-start fill-end)
(fill-paragraph justify)
;; If no filling happens, whatever called us should not
;; continue with standard text filling, so return t
t)))
((eolp)
;; do nothing outside of a comment
t)
(t
;; go to end of line and try again
(end-of-line)
(haskell-fill-paragraph justify))))))
;; (defun haskell-adaptive-fill ()
;; ;; We want to use "-- " as the prefix of "-- |", etc.
;; (let* ((line-end (save-excursion (end-of-line) (point)))
;; (line-start (point)))
;; (save-excursion
;; (unless (in-comment)
;; ;; Try to find the start of a comment. We only fill comments.
;; (search-forward-regexp comment-start-skip line-end t))
;; (when (in-comment)
;; (let ();(prefix-start (point)))
;; (skip-syntax-forward "^w")
;; (make-string (- (point) line-start) ?\s))))))
;;;###autoload
(defun haskell-forward-sexp (&optional arg)
"Haskell specific version of `forward-sexp'.
Move forward across one balanced expression (sexp). With ARG, do
it that many times. Negative arg -N means move backward across N
balanced expressions. This command assumes point is not in a
string or comment.
If unable to move over a sexp, signal `scan-error' with three
arguments: a message, the start of the obstacle (a parenthesis or
list marker of some kind), and end of the obstacle."
(interactive "^p")
(or arg (setq arg 1))
(if (< arg 0)
(while (< arg 0)
(skip-syntax-backward "->")
;; Navigate backwards using plain `backward-sexp', assume that it
;; skipped over at least one Haskell expression, and jump forward until
;; last possible point before the starting position. If applicable,
;; `scan-error' is signalled by `backward-sexp'.
(let ((end (point))
(forward-sexp-function nil))
(backward-sexp)
(let ((cur (point)))
(while (< (point) end)
(setf cur (point))
(haskell-forward-sexp)
(skip-syntax-forward "->"))
(goto-char cur)))
(setf arg (1+ arg)))
(save-match-data
(while (> arg 0)
(when (haskell-lexeme-looking-at-token)
(cond ((member (match-string 0) (list "(" "[" "{"))
(goto-char (or (scan-sexps (point) 1) (buffer-end 1))))
((member (match-string 0) (list ")" "]" "}"))
(signal 'scan-error (list "Containing expression ends prematurely."
(match-beginning 0)
(match-end 0))))
(t (goto-char (match-end 0)))))
(setf arg (1- arg))))))
;;;###autoload
(define-derived-mode haskell-literate-mode haskell-mode "LitHaskell"
"As `haskell-mode' but for literate scripts."
(setq haskell-literate
(save-excursion
(goto-char (point-min))
(cond
((re-search-forward "^\\\\\\(begin\\|end\\){code}$" nil t) 'tex)
((re-search-forward "^>" nil t) 'bird)
(t haskell-literate-default))))
(if (eq haskell-literate 'bird)
;; fill-comment-paragraph isn't much use there, and even gets confused
;; by the syntax-table text-properties we add to mark the first char
;; of each line as a comment-starter.
(setq-local fill-paragraph-handle-comment nil))
(setq-local mode-line-process '("/" (:eval (symbol-name haskell-literate)))))
;;;###autoload
(define-obsolete-function-alias 'literate-haskell-mode 'haskell-literate-mode "2020-04")
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.[gh]s\\'" . haskell-mode))
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.hsig\\'" . haskell-mode))
;;;###autoload
(add-to-list 'auto-mode-alist '("\\.l[gh]s\\'" . haskell-literate-mode))