;;; 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 ;; Author: 1992 Simon Marlow ;; 1997-1998 Graeme E Moss and ;; Tommy Thorn , ;; 2001-2002 Reuben Thomas (>=v1.4) ;; 2003 Dave Love ;; 2016 Arthur Fayzrakhmanov ;; Keywords: faces files Haskell ;; Version: 16.2-git ;; 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 . ;;; 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 . ;; ;; 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 ;; : ;; ;; 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 : ;; ;; 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 'outline) (require 'cl-lib) (require 'haskell-ghc-support) (require 'haskell-complete-module) (require 'haskell-compat) (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 `literate-haskell-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 : ;; - 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] "---" ,(if (default-boundp 'eldoc-documentation-function) ["Doc mode" eldoc-mode :style toggle :selected (bound-and-true-p eldoc-mode)] ["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 ;; immediatelly (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 \">\"." (interactive "*P") (let ((fill-prefix (or fill-prefix (if (eq haskell-literate 'bird) ">")))) (delete-indentation arg))) (defvar eldoc-print-current-symbol-info-function) ;; The main mode functions ;;;###autoload (define-derived-mode haskell-mode prog-mode "Haskell" "Major mode for editing Haskell programs. \\ Literate Haskell scripts are supported via `literate-haskell-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 Echoes 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 "24.3") (error "haskell-mode requires at least Emacs 24.3")) ;; 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 0) (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 eldoc-mode. (setq-local eldoc-documentation-function 'haskell-doc-current-info) ;; 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) (haskell-indentation-mode)) (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)) (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 literate-haskell-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 (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\\'" . literate-haskell-mode)) ;;;###autoload (add-to-list 'auto-mode-alist '("\\.hsc\\'" . haskell-mode)) ;;;###autoload (add-to-list 'interpreter-mode-alist '("runghc" . haskell-mode)) ;;;###autoload (add-to-list 'interpreter-mode-alist '("runhaskell" . haskell-mode)) ;;;###autoload (add-to-list 'completion-ignored-extensions ".hi") (defcustom haskell-check-command "hlint" "*Command used to check a Haskell file." :group 'haskell :type '(choice (const "hlint") (const "ghc -fno-code") (string :tag "Other command"))) (defcustom haskell-tags-on-save nil "Generate tags via hasktags after saving." :group 'haskell :type 'boolean) (defvar haskell-saved-check-command nil "Internal use.") ;; Like Python. Should be abstracted, sigh. (defun haskell-check (command) "Check a Haskell file (default current buffer's file). Runs COMMAND, a shell command, as if by `compile'. See `haskell-check-command' for the default." (interactive (list (read-string "Checker command: " (or haskell-saved-check-command (concat haskell-check-command " " (let ((name (buffer-file-name))) (if name (file-name-nondirectory name)))))))) (setq haskell-saved-check-command command) (save-some-buffers (not compilation-ask-about-save) nil) (compilation-start command)) (defun haskell-flymake-init () "Flymake init function for Haskell. To be added to `flymake-init-create-temp-buffer-copy'." (let ((checker-elts (and haskell-saved-check-command (split-string haskell-saved-check-command)))) (list (car checker-elts) (append (cdr checker-elts) (list (flymake-init-create-temp-buffer-copy 'flymake-create-temp-inplace)))))) (add-to-list 'flymake-allowed-file-name-masks '("\\.l?hs\\'" haskell-flymake-init)) (defun haskell-mode-format-imports () "Format the imports by aligning and sorting them." (interactive) (let ((col (current-column))) (haskell-sort-imports) (haskell-align-imports) (goto-char (+ (line-beginning-position) col)))) (declare-function haskell-mode-stylish-buffer "haskell-commands") (defun haskell-mode-before-save-handler () "Function that will be called before buffer's saving." (when haskell-stylish-on-save (ignore-errors (haskell-mode-stylish-buffer)))) ;; From Bryan O'Sullivan's blog: ;; http://www.serpentine.com/blog/2007/10/09/using-emacs-to-insert-scc-annotations-in-haskell-code/ (defun haskell-mode-try-insert-scc-at-point () "Try to insert an SCC annotation at point. Return true if successful, nil otherwise." (if (or (looking-at "\\b\\|[ \t]\\|$") ;; Allow SCC if point is on a non-letter with whitespace to the left (and (not (bolp)) (save-excursion (forward-char -1) (looking-at "[ \t]")))) (let ((space-at-point (looking-at "[ \t]"))) (unless (and (not (bolp)) (save-excursion (forward-char -1) (looking-at "[ \t]"))) (insert " ")) (insert "{-# SCC \"\" #-}") (unless space-at-point (insert " ")) (forward-char (if space-at-point -5 -6)) t ))) (defun haskell-mode-insert-scc-at-point () "Insert an SCC annotation at point." (interactive) (if (not (haskell-mode-try-insert-scc-at-point)) (error "Not over an area of whitespace"))) (make-obsolete 'haskell-mode-insert-scc-at-point 'haskell-mode-toggle-scc-at-point "2015-11-11") (defun haskell-mode-try-kill-scc-at-point () "Try to kill an SCC annotation at point. Return true if successful, nil otherwise." (save-excursion (let ((old-point (point)) (scc "\\({-#[ \t]*SCC \"[^\"]*\"[ \t]*#-}\\)[ \t]*")) (while (not (or (looking-at scc) (bolp))) (forward-char -1)) (if (and (looking-at scc) (<= (match-beginning 1) old-point) (> (match-end 1) old-point)) (progn (kill-region (match-beginning 0) (match-end 0)) t))))) ;; Also Bryan O'Sullivan's. (defun haskell-mode-kill-scc-at-point () "Kill the SCC annotation at point." (interactive) (if (not (haskell-mode-try-kill-scc-at-point)) (error "No SCC at point"))) (make-obsolete 'haskell-mode-kill-scc-at-point 'haskell-mode-toggle-scc-at-point "2015-11-11") (defun haskell-mode-toggle-scc-at-point () "If point is in an SCC annotation, kill the annotation. Otherwise, try to insert a new annotation." (interactive) (if (not (haskell-mode-try-kill-scc-at-point)) (if (not (haskell-mode-try-insert-scc-at-point)) (error "Could not insert or remove SCC")))) (defun haskell-guess-module-name-from-file-name (file-name) "Guess the module name from FILE-NAME. Based on given FILE-NAME this function tries to find path components that look like module identifiers and composes full module path using this information. For example: /Abc/Def/Xyz.lhs => Abc.Def.Xyz /Ab-c/Def/Xyz.lhs => Def.Xyz src/Abc/Def/Xyz.hs => Abc.Def.Xyz c:\\src\\Abc\\Def\\Xyz.hs => Abc.Def.Xyz nonmodule.txt => nil This function usually will be used with `buffer-file-name': (haskell-guess-module-name-from-file-name (buffer-file-name))" (let* ((file-name-sans-ext (file-name-sans-extension file-name)) (components (cl-loop for part in (reverse (split-string file-name-sans-ext "/")) while (let ((case-fold-search nil)) (string-match (concat "^" haskell-lexeme-modid "$") part)) collect part))) (when components (mapconcat 'identity (reverse components) ".")))) (defun haskell-guess-module-name () "Guess the current module name of the buffer. Uses `haskell-guess-module-name-from-file-name'." (haskell-guess-module-name-from-file-name (buffer-file-name))) (defvar haskell-auto-insert-module-format-string "-- | \n\nmodule %s where\n\n" "Template string that will be inserted in new haskell buffers via `haskell-auto-insert-module-template'.") (defun haskell-auto-insert-module-template () "Insert a module template for the newly created buffer." (interactive) (when (and (= (point-min) (point-max)) (buffer-file-name)) (insert (format haskell-auto-insert-module-format-string (haskell-guess-module-name-from-file-name (buffer-file-name)))) (goto-char (point-min)) (end-of-line))) ;;;###autoload (defun haskell-mode-generate-tags (&optional and-then-find-this-tag) "Generate tags using Hasktags. This is synchronous function. If optional AND-THEN-FIND-THIS-TAG argument is present it is used with function `xref-find-definitions' after new table was generated." (interactive) (let* ((dir (haskell-cabal--find-tags-dir)) (command (haskell-cabal--compose-hasktags-command dir))) (if (not command) (error "Unable to compose hasktags command") (shell-command command) (haskell-mode-message-line "Tags generated.") (when and-then-find-this-tag (let ((tags-file-name dir)) (xref-find-definitions and-then-find-this-tag)))))) ;; Provide ourselves: (provide 'haskell-mode) ;;; haskell-mode.el ends here