/usr/share/emacs/site-lisp/ghc-mod/ghc-check.el is in ghc-mod-el 5.6.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;; ghc-check.el
;;;
;; Author: Kazu Yamamoto <Kazu@Mew.org>
;; Created: Mar 9, 2014
;;; Code:
(require 'ghc-func)
(require 'ghc-process)
(require 'button)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; stolen from flymake.el
(defface ghc-face-error
'((((supports :underline (:style wave)))
:underline (:style wave :color "orangered"))
(t
:inherit error))
"Face used for error lines."
:group 'ghc)
(defface ghc-face-warn
'((((supports :underline (:style wave)))
:underline (:style wave :color "gold"))
(t
:inherit warning))
"Face used for warning lines."
:group 'ghc)
(defface ghc-face-hole
'((((supports :underline (:style wave)))
:underline (:style wave :color "purple"))
(t
:inherit warning))
"Face used for hole lines."
:group 'ghc)
(defvar ghc-check-error-fringe (propertize "!" 'display '(left-fringe exclamation-mark)))
(defvar ghc-check-warning-fringe (propertize "?" 'display '(left-fringe question-mark)))
(defvar ghc-check-hole-fringe (propertize "_" 'display '(left-fringe horizontal-bar)))
(defvar ghc-display-error nil
"*How to display errors/warnings when using 'M-n' and 'M-p':
nil do not display errors/warnings.
'minibuffer display errors/warnings in the minibuffer.
'other-buffer display errors/warnings in a new buffer.
")
(defvar ghc-display-hole 'other-buffer
"*How to display hole information when using 'C-c C-j' and 'C-c C-h'
'minibuffer display errors/warnings in the minibuffer.
'other-buffer display errors/warnings in the a new buffer"
)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-check-syntax ()
(interactive)
;; Only check syntax of visible buffers
(when (and (buffer-file-name)
(file-exists-p (buffer-file-name)))
(ghc-with-process (ghc-check-send)
'ghc-check-callback
(lambda () (setq mode-line-process " -:-")))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(ghc-defstruct hilit-info file line msg err hole coln)
(defun ghc-check-send ()
(let ((file (buffer-file-name)))
(if ghc-check-command
(let ((opts (ghc-haskell-list-of-string ghc-hlint-options)))
(if opts
(format "lint %s %s\n" opts file)
(format "lint %s\n" file)))
(format "check %s\n" file))))
(defun ghc-haskell-list-of-string (los)
(when los
(concat "["
(mapconcat (lambda (x) (concat "\"" x "\"")) los ", ")
"]")))
(defun ghc-check-callback (status)
(cond
((eq status 'ok)
(let* ((errs (ghc-read-lisp-this-buffer))
(infos (ghc-to-info errs)))
(cond
(infos
(let ((file ghc-process-original-file)
(buf ghc-process-original-buffer))
(ghc-check-highlight-original-buffer file buf infos)))
(t
(ghc-with-current-buffer ghc-process-original-buffer
(remove-overlays (point-min) (point-max) 'ghc-check t))))
(ghc-with-current-buffer ghc-process-original-buffer
(let ((len (length infos)))
(if (= len 0)
(setq mode-line-process "")
(let* ((errs (ghc-filter 'ghc-hilit-info-get-err infos))
(elen (length errs))
(wlen (- len elen)))
(setq mode-line-process (format " %d:%d" elen wlen)))))
(force-mode-line-update))))
(t
(let* ((err (ghc-unescape-string (buffer-substring-no-properties (+ (point) 3) (point-max))))
(info (ghc-make-hilit-info
:file "Fail errors:"
:line 0
:coln 0
:msg err
:err t
:hole nil))
(infos (list info))
(file ghc-process-original-file)
(buf ghc-process-original-buffer))
(ghc-check-highlight-original-buffer file buf infos))
(ghc-with-current-buffer ghc-process-original-buffer
(setq mode-line-process " failed")
(force-mode-line-update)))))
(defun ghc-to-info (errs)
;; [^\t] to include \n.
(let ((regex "^\\([^\n]*\\):\\([0-9]+\\):\\([0-9]+\\): *\\([^\t]+\\)")
infos)
(dolist (err errs (nreverse infos))
(when (string-match regex err)
(let* ((file (expand-file-name (match-string 1 err) ghc-process-root)) ;; for Windows
(line (string-to-number (match-string 2 err)))
(coln (string-to-number (match-string 3 err)))
(msg (match-string 4 err))
(wrn (string-match "^Warning" msg))
(hole (save-match-data
(when (string-match "Found hole .\\(_[_[:alnum:]]*\\)." msg)
(match-string 1 msg))))
(info (ghc-make-hilit-info
:file file
:line line
:coln coln
:msg msg
:err (and (not wrn) (not hole))
:hole hole)))
(unless (member info infos)
(ghc-add infos info)))))))
(defun ghc-check-highlight-original-buffer (ofile buf infos)
(ghc-with-current-buffer buf
(remove-overlays (point-min) (point-max) 'ghc-check t)
(save-excursion
(goto-char (point-min))
(dolist (info infos)
(let ((line (ghc-hilit-info-get-line info))
(msg (ghc-hilit-info-get-msg info))
(file (ghc-hilit-info-get-file info))
(err (ghc-hilit-info-get-err info))
(hole (ghc-hilit-info-get-hole info))
(coln (ghc-hilit-info-get-coln info))
beg end ovl)
;; FIXME: This is the Shlemiel painter's algorithm.
;; If this is a bottleneck for a large code, let's fix.
(goto-char (point-min))
(cond
((file-equal-p ofile file)
(if hole
(progn
(forward-line (1- line))
(forward-char (1- coln))
(setq beg (point))
(forward-char (length hole))
(setq end (point)))
(progn
(forward-line (1- line))
(forward-char (1- coln))
(setq beg (point))
(forward-sexp)
;; (skip-chars-forward "^[:space:]" (line-end-position))
(setq end (point)))))
(t
(setq beg (point))
(forward-line)
(setq end (point))))
(setq ovl (make-overlay beg end))
(overlay-put ovl 'ghc-check t)
(overlay-put ovl 'ghc-file file)
(overlay-put ovl 'ghc-msg msg)
(overlay-put ovl 'help-echo msg)
(overlay-put ovl 'ghc-hole hole)
(let ((fringe (if err ghc-check-error-fringe (if hole ghc-check-hole-fringe ghc-check-warning-fringe)))
(face (if err 'ghc-face-error (if hole 'ghc-face-hole 'ghc-face-warn))))
(overlay-put ovl 'before-string fringe)
(overlay-put ovl 'face face)))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-overlay-p (ovl)
(overlay-get ovl 'ghc-check))
(defun ghc-check-overlay-at (p)
(ghc-filter 'ghc-overlay-p (overlays-at p)))
(ghc-defstruct file-msgs file msgs)
(defun ghc-get-errors-over-warnings ()
(let ((ovls (ghc-check-overlay-at (point))))
(when ovls
(let ((msgs (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) ovls))
(file (overlay-get (car ovls) 'ghc-file))
errs wrns)
(dolist (msg msgs)
(if (string-match "^Warning" msg)
(ghc-add wrns msg)
(ghc-add errs msg)))
(ghc-make-file-msgs :file file :msgs (nconc errs wrns))))))
(defun ghc-display-errors ()
(interactive)
(let ((file-msgs (ghc-get-errors-over-warnings)))
(if (null file-msgs)
(message "No errors or warnings")
(let ((file (ghc-file-msgs-get-file file-msgs))
(msgs (ghc-file-msgs-get-msgs file-msgs)))
(ghc-display
nil
(lambda ()
(insert file "\n\n")
(mapc (lambda (x) (insert x "\n\n")) msgs)))))))
(defun ghc-display-errors-to-minibuf ()
(let ((file-msgs (ghc-get-errors-over-warnings)))
(if (null file-msgs)
(message "No errors or warnings")
(let* ((file (ghc-file-msgs-get-file file-msgs))
(msgs (ghc-file-msgs-get-msgs file-msgs))
(errmsg (mapconcat 'identity msgs "\n"))
(buffile buffer-file-name))
(if (string-equal buffile file)
(message "%s" errmsg)
(message "%s\n\n%s" file errmsg))))))
(defun ghc-get-only-holes ()
(let ((ovls (ghc-check-overlay-at (point))))
(when ovls
(let ((msgs (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) ovls))
(file (overlay-get (car ovls) 'ghc-file))
holes)
(dolist (msg msgs)
(if (string-match "Found hole" msg)
(ghc-add holes msg)
nil))
(ghc-make-file-msgs :file file :msgs holes)))))
;; Based on http://superuser.com/questions/331895/how-to-get-emacs-to-highlight-and-link-file-paths
(defun find-file-button (button)
(let ((text (buffer-substring (button-start button) (button-end button))))
(when (string-match "\\(/[^:]*\\):\\([[:digit:]]+\\):\\([[:digit:]]+\\)" text)
(let* ((file (match-string 1 text))
(line (string-to-number (match-string 2 text)))
(coln (string-to-number (match-string 3 text)))
(buf (find-file file)))
(with-current-buffer buf
(let* ((this-line (line-number-at-pos))
(diff (- line this-line)))
(beginning-of-line)
(forward-line diff)
(forward-char (1- coln))))))))
(define-button-type 'find-file-button
'follow-link t
'help-echo "mouse-2, RET: Go to definition"
'action #'find-file-button)
(defun buttonize-buffer ()
"turn all file paths into buttons"
(save-excursion
(goto-char (point-min))
(while (re-search-forward "/[^ \t:]*:[[:digit:]]+:[[:digit:]]+" nil t)
(make-button (match-beginning 0) (match-end 0) :type 'find-file-button))))
(defun ghc-display-holes ()
(interactive)
(let ((file-msgs (ghc-get-only-holes)))
(if (null file-msgs)
(message "No holes")
(let ((msgs (ghc-file-msgs-get-msgs file-msgs)))
(ghc-display
nil
(lambda ()
(progn
(mapc (lambda (x) (insert x "\n\n")) msgs)
(buttonize-buffer))))))))
(defun ghc-display-holes-to-minibuf ()
(let ((file-msgs (ghc-get-only-holes)))
(if (null file-msgs)
(message "No holes")
(let* ((file (ghc-file-msgs-get-file file-msgs))
(msgs (ghc-file-msgs-get-msgs file-msgs))
(errmsg (mapconcat 'identity msgs "\n"))
(buffile buffer-file-name))
(if (string-equal buffile file)
(message "%s" errmsg)
(message "%s\n\n%s" file errmsg))))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-goto-prev-error ()
(interactive)
(let* ((here (point))
(ovls0 (ghc-check-overlay-at here))
(end (if ovls0 (overlay-start (car ovls0)) here))
(ovls1 (overlays-in (point-min) end))
(ovls2 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls1))
(pnts (mapcar 'overlay-start ovls2)))
(if pnts (goto-char (apply 'max pnts))))
(cond
((eq ghc-display-error 'minibuffer) (ghc-display-errors-to-minibuf))
((eq ghc-display-error 'other-buffer) (ghc-display-errors))))
(defun ghc-goto-next-error ()
(interactive)
(let* ((here (point))
(ovls0 (ghc-check-overlay-at here))
(beg (if ovls0 (overlay-end (car ovls0)) here))
(ovls1 (overlays-in beg (point-max)))
(ovls2 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls1))
(pnts (mapcar 'overlay-start ovls2)))
(if pnts (goto-char (apply 'min pnts))))
(cond
((eq ghc-display-error 'minibuffer) (ghc-display-errors-to-minibuf))
((eq ghc-display-error 'other-buffer) (ghc-display-errors))))
(defun ghc-goto-prev-hole ()
(interactive)
(let* ((here (point))
(ovls0 (ghc-check-overlay-at here))
(end (if ovls0 (overlay-start (car ovls0)) here))
(ovls1 (overlays-in (point-min) end))
(ovls2 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls1))
(ovls3 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-hole)) ovls2))
(pnts (mapcar 'overlay-start ovls3)))
(if pnts (goto-char (apply 'max pnts))))
(cond
((eq ghc-display-hole 'minibuffer) (ghc-display-holes-to-minibuf))
((eq ghc-display-hole 'other-buffer) (ghc-display-holes))))
(defun ghc-goto-next-hole ()
(interactive)
(let* ((here (point))
(ovls0 (ghc-check-overlay-at here))
(beg (if ovls0 (overlay-end (car ovls0)) here))
(ovls1 (overlays-in beg (point-max)))
(ovls2 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-check)) ovls1))
(ovls3 (ghc-filter (lambda (ovl) (overlay-get ovl 'ghc-hole)) ovls2))
(pnts (mapcar 'overlay-start ovls3)))
(if pnts (goto-char (apply 'min pnts))))
(cond
((eq ghc-display-hole 'minibuffer) (ghc-display-holes-to-minibuf))
((eq ghc-display-hole 'other-buffer) (ghc-display-holes))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-check-insert-from-warning ()
(interactive)
(let ((ret t))
(dolist (data (delete-dups (mapcar (lambda (ovl) (overlay-get ovl 'ghc-msg)) (ghc-check-overlay-at (point)))) ret)
(save-excursion
(cond
((string-match "Inferred type: \\|no type signature:" data)
(beginning-of-line)
(insert-before-markers (ghc-extract-type data) "\n"))
((string-match "lacks an accompanying binding" data)
(beginning-of-line)
(when (looking-at "^\\([^ ]+\\) *::")
(save-match-data
(forward-line)
(if (not (bolp)) (insert "\n")))
(insert (match-string 1) " = undefined\n")))
;; GHC 7.8 uses Unicode for single-quotes.
((string-match "Not in scope: type constructor or class .\\([^\n]+\\)." data)
(let ((sym (match-string 1 data)))
(ghc-ins-mod sym)))
((string-match "Not in scope: data constructor .\\([^\n]+\\)." data)
;; if the type of data constructor, it would be nice.
(let ((sym (match-string 1 data)))
(ghc-ins-mod sym)))
((string-match "\n[ ]+.\\([^ ]+\\). is a data constructor of .\\([^\n]+\\).\n" data)
(let* ((old (match-string 1 data))
(type-const (match-string 2 data))
(new (format "%s(%s)" type-const old)))
(ghc-check-replace old new)))
((string-match "Not in scope: .\\([^\n]+\\)." data)
(let ((sym (match-string 1 data)))
(if (or (string-match "\\." sym) ;; qualified
(y-or-n-p (format "Import module for %s?" sym)))
(ghc-ins-mod sym)
(unless (re-search-forward "^$" nil t)
(goto-char (point-max))
(insert "\n"))
(insert "\n" (ghc-enclose sym) " = undefined\n"))))
((string-match "Pattern match(es) are non-exhaustive" data)
(let* ((fn (ghc-get-function-name))
(arity (ghc-get-function-arity fn)))
(ghc-insert-underscore fn arity)))
((string-match "Found:\n[ ]+\\([^\t]+\\)\nWhy not:\n[ ]+\\([^\t]+\\)" data)
(let ((old (match-string 1 data))
(new (match-string 2 data)))
(ghc-check-replace old new)))
((string-match "Found hole .\\(_[_[:alnum:]]*\\). with type: \\([^\t\n]+\\)" data)
(let ((old (match-string 1 data))
(new (match-string 2 data)))
(ghc-check-replace old new)))
(t
(setq ret nil)))))))
(defun ghc-check-replace (old new)
(beginning-of-line)
(when (search-forward old nil t)
(let ((end (point)))
(search-backward old nil t)
(delete-region (point) end))
(insert new)))
(defun ghc-extract-type (str)
(with-temp-buffer
(insert str)
(goto-char (point-min))
(when (re-search-forward "Inferred type: \\|no type signature:\\( \\|\n +\\)?" nil t)
(delete-region (point-min) (point)))
(when (re-search-forward " forall [^.]+\\." nil t)
(replace-match ""))
(while (re-search-forward "\n +" nil t)
(replace-match " "))
(goto-char (point-min))
(while (re-search-forward "\\[Char\\]" nil t)
(replace-match "String"))
(buffer-substring-no-properties (point-min) (point-max))))
(defun ghc-get-function-name ()
(save-excursion
(beginning-of-line)
(when (looking-at "\\([^ ]+\\) ")
(match-string 1))))
(defun ghc-get-function-arity (fn)
(when fn
(save-excursion
(let ((regex (format "^%s *::" (regexp-quote fn))))
(when (re-search-backward regex nil t)
(ghc-get-function-arity0))))))
(defun ghc-get-function-arity0 ()
(let ((end (save-excursion (end-of-line) (point)))
(arity 0))
(while (search-forward "->" end t)
(setq arity (1+ arity)))
arity))
(defun ghc-insert-underscore (fn ar)
(when fn
(let ((arity (or ar 1)))
(save-excursion
(goto-char (point-max))
(re-search-backward (format "^%s *::" (regexp-quote fn)))
(forward-line)
(re-search-forward "^$" nil t)
(insert fn)
(dotimes (_i arity)
(insert " _"))
(insert " = error \"" fn "\"\n")))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defun ghc-jump-file ()
(interactive)
(let* ((ovl (car (ghc-check-overlay-at 1)))
(file (if ovl (overlay-get ovl 'ghc-file))))
(if file (find-file file))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(defvar ghc-hlint-options nil "*Hlint options")
(defvar ghc-check-command nil)
(defun ghc-toggle-check-command ()
(interactive)
(setq ghc-check-command (not ghc-check-command))
(if ghc-check-command
(message "Syntax check with hlint")
(message "Syntax check with GHC")))
(provide 'ghc-check)
|