Mercurial > hg > xemacs-beta
comparison lisp/cc-mode/cc-engine.el @ 165:5a88923fcbfe r20-3b9
Import from CVS: tag r20-3b9
| author | cvs |
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| date | Mon, 13 Aug 2007 09:44:42 +0200 |
| parents | |
| children | 929b76928fce |
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| 164:4e0740e5aab2 | 165:5a88923fcbfe |
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| 1 ;;; cc-engine.el --- core syntax guessing engine for CC mode | |
| 2 | |
| 3 ;; Copyright (C) 1985,87,92,93,94,95,96,97 Free Software Foundation, Inc. | |
| 4 | |
| 5 ;; Authors: 1992-1997 Barry A. Warsaw | |
| 6 ;; 1987 Dave Detlefs and Stewart Clamen | |
| 7 ;; 1985 Richard M. Stallman | |
| 8 ;; Maintainer: cc-mode-help@python.org | |
| 9 ;; Created: 22-Apr-1997 (split from cc-mode.el) | |
| 10 ;; Version: 5.11 | |
| 11 ;; Keywords: c languages oop | |
| 12 | |
| 13 ;; This file is part of GNU Emacs. | |
| 14 | |
| 15 ;; GNU Emacs is free software; you can redistribute it and/or modify | |
| 16 ;; it under the terms of the GNU General Public License as published by | |
| 17 ;; the Free Software Foundation; either version 2, or (at your option) | |
| 18 ;; any later version. | |
| 19 | |
| 20 ;; GNU Emacs is distributed in the hope that it will be useful, | |
| 21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 23 ;; GNU General Public License for more details. | |
| 24 | |
| 25 ;; You should have received a copy of the GNU General Public License | |
| 26 ;; along with GNU Emacs; see the file COPYING. If not, write to the | |
| 27 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 28 ;; Boston, MA 02111-1307, USA. | |
| 29 | |
| 30 | |
| 31 ;; utilities | |
| 32 (defmacro c-add-syntax (symbol &optional relpos) | |
| 33 ;; a simple macro to append the syntax in symbol to the syntax list. | |
| 34 ;; try to increase performance by using this macro | |
| 35 (` (setq syntax (cons (cons (, symbol) (, relpos)) syntax)))) | |
| 36 | |
| 37 (defsubst c-auto-newline () | |
| 38 ;; if auto-newline feature is turned on, insert a newline character | |
| 39 ;; and return t, otherwise return nil. | |
| 40 (and c-auto-newline | |
| 41 (not (c-in-literal)) | |
| 42 (not (newline)))) | |
| 43 | |
| 44 (defsubst c-intersect-lists (list alist) | |
| 45 ;; return the element of ALIST that matches the first element found | |
| 46 ;; in LIST. Uses assq. | |
| 47 (let (match) | |
| 48 (while (and list | |
| 49 (not (setq match (assq (car list) alist)))) | |
| 50 (setq list (cdr list))) | |
| 51 match)) | |
| 52 | |
| 53 (defsubst c-lookup-lists (list alist1 alist2) | |
| 54 ;; first, find the first entry from LIST that is present in ALIST1, | |
| 55 ;; then find the entry in ALIST2 for that entry. | |
| 56 (assq (car (c-intersect-lists list alist1)) alist2)) | |
| 57 | |
| 58 | |
| 59 ;; WARNING: Be *exceptionally* careful about modifications to this | |
| 60 ;; function! Much of CC Mode depends on this Doing The Right Thing. | |
| 61 ;; If you break it you will be sorry. | |
| 62 | |
| 63 (defun c-beginning-of-statement-1 (&optional lim) | |
| 64 ;; move to the start of the current statement, or the previous | |
| 65 ;; statement if already at the beginning of one. | |
| 66 (let ((firstp t) | |
| 67 (substmt-p t) | |
| 68 donep c-in-literal-cache | |
| 69 ;; KLUDGE ALERT: maybe-labelp is used to pass information | |
| 70 ;; between c-crosses-statement-barrier-p and | |
| 71 ;; c-beginning-of-statement-1. A better way should be | |
| 72 ;; implemented. | |
| 73 maybe-labelp saved | |
| 74 (last-begin (point))) | |
| 75 ;; first check for bare semicolon | |
| 76 (if (and (progn (c-backward-syntactic-ws lim) | |
| 77 (= (preceding-char) ?\;)) | |
| 78 (c-safe (progn (forward-char -1) | |
| 79 (setq saved (point)) | |
| 80 t)) | |
| 81 (progn (c-backward-syntactic-ws lim) | |
| 82 (memq (preceding-char) '(?\; ?{ ?} ?:))) | |
| 83 ) | |
| 84 (setq last-begin saved) | |
| 85 (goto-char last-begin) | |
| 86 (while (not donep) | |
| 87 ;; stop at beginning of buffer | |
| 88 (if (bobp) (setq donep t) | |
| 89 ;; go backwards one balanced expression, but be careful of | |
| 90 ;; unbalanced paren being reached | |
| 91 (if (not (c-safe (progn (backward-sexp 1) t))) | |
| 92 (progn | |
| 93 (if firstp | |
| 94 (backward-up-list 1) | |
| 95 (goto-char last-begin)) | |
| 96 ;; skip over any unary operators, or other special | |
| 97 ;; characters appearing at front of identifier | |
| 98 (save-excursion | |
| 99 (c-backward-syntactic-ws lim) | |
| 100 (skip-chars-backward "-+!*&:.~ \t\n") | |
| 101 (if (= (preceding-char) ?\() | |
| 102 (setq last-begin (point)))) | |
| 103 (goto-char last-begin) | |
| 104 (setq last-begin (point) | |
| 105 donep t))) | |
| 106 | |
| 107 (setq maybe-labelp nil) | |
| 108 ;; see if we're in a literal. if not, then this bufpos may be | |
| 109 ;; a candidate for stopping | |
| 110 (cond | |
| 111 ;; CASE 0: did we hit the error condition above? | |
| 112 (donep) | |
| 113 ;; CASE 1: are we in a literal? | |
| 114 ((eq (c-in-literal lim) 'pound) | |
| 115 (beginning-of-line)) | |
| 116 ;; CASE 2: some other kind of literal? | |
| 117 ((c-in-literal lim)) | |
| 118 ;; CASE 3: are we looking at a conditional keyword? | |
| 119 ((or (looking-at c-conditional-key) | |
| 120 (and (= (following-char) ?\() | |
| 121 (save-excursion | |
| 122 (forward-sexp 1) | |
| 123 (c-forward-syntactic-ws) | |
| 124 (/= (following-char) ?\;)) | |
| 125 (let ((here (point)) | |
| 126 (foundp (progn | |
| 127 (c-backward-syntactic-ws lim) | |
| 128 (forward-word -1) | |
| 129 (and lim | |
| 130 (<= lim (point)) | |
| 131 (not (c-in-literal lim)) | |
| 132 (looking-at c-conditional-key) | |
| 133 )))) | |
| 134 ;; did we find a conditional? | |
| 135 (if (not foundp) | |
| 136 (goto-char here)) | |
| 137 foundp))) | |
| 138 ;; are we in the middle of an else-if clause? | |
| 139 (if (save-excursion | |
| 140 (and (not substmt-p) | |
| 141 (c-safe (progn (forward-sexp -1) t)) | |
| 142 (looking-at "\\<else\\>[ \t\n]+\\<if\\>") | |
| 143 (not (c-in-literal lim)))) | |
| 144 (progn | |
| 145 (forward-sexp -1) | |
| 146 (c-backward-to-start-of-if lim))) | |
| 147 ;; are we sitting at an else clause, that we are not a | |
| 148 ;; substatement of? | |
| 149 (if (and (not substmt-p) | |
| 150 (looking-at "\\<else\\>[^_]")) | |
| 151 (c-backward-to-start-of-if lim)) | |
| 152 ;; are we sitting at the while of a do-while? | |
| 153 (if (and (looking-at "\\<while\\>[^_]") | |
| 154 (c-backward-to-start-of-do lim)) | |
| 155 (setq substmt-p nil)) | |
| 156 (setq last-begin (point) | |
| 157 donep substmt-p)) | |
| 158 ;; CASE 4: are we looking at a label? | |
| 159 ((looking-at c-label-key)) | |
| 160 ;; CASE 5: is this the first time we're checking? | |
| 161 (firstp (setq firstp nil | |
| 162 substmt-p (not (c-crosses-statement-barrier-p | |
| 163 (point) last-begin)) | |
| 164 last-begin (point))) | |
| 165 ;; CASE 6: have we crossed a statement barrier? | |
| 166 ((c-crosses-statement-barrier-p (point) last-begin) | |
| 167 (setq donep t)) | |
| 168 ;; CASE 7: ignore labels | |
| 169 ((and maybe-labelp | |
| 170 (or (and c-access-key (looking-at c-access-key)) | |
| 171 ;; with switch labels, we have to go back further | |
| 172 ;; to try to pick up the case or default | |
| 173 ;; keyword. Potential bogosity alert: we assume | |
| 174 ;; `case' or `default' is first thing on line | |
| 175 (let ((here (point))) | |
| 176 (beginning-of-line) | |
| 177 (c-forward-syntactic-ws) | |
| 178 (if (looking-at c-switch-label-key) | |
| 179 t | |
| 180 (goto-char here) | |
| 181 nil)) | |
| 182 (looking-at c-label-key)))) | |
| 183 ;; CASE 8: ObjC or Java method def | |
| 184 ((and c-method-key | |
| 185 (setq last-begin (c-in-method-def-p))) | |
| 186 (setq donep t)) | |
| 187 ;; CASE 9: nothing special | |
| 188 (t (setq last-begin (point))) | |
| 189 )))) | |
| 190 (goto-char last-begin) | |
| 191 ;; we always do want to skip over non-whitespace modifier | |
| 192 ;; characters that didn't get skipped above | |
| 193 (skip-chars-backward "-+!*&:.~" (c-point 'boi)))) | |
| 194 | |
| 195 (defun c-end-of-statement-1 () | |
| 196 (condition-case () | |
| 197 (progn | |
| 198 (while (and (not (eobp)) | |
| 199 (let ((beg (point))) | |
| 200 (forward-sexp 1) | |
| 201 (let ((end (point))) | |
| 202 (save-excursion | |
| 203 (goto-char beg) | |
| 204 (not (re-search-forward "[;{}]" end t))))))) | |
| 205 (re-search-backward "[;}]") | |
| 206 (forward-char 1)) | |
| 207 (error | |
| 208 (let ((beg (point))) | |
| 209 (backward-up-list -1) | |
| 210 (let ((end (point))) | |
| 211 (goto-char beg) | |
| 212 (search-forward ";" end 'move)))))) | |
| 213 | |
| 214 | |
| 215 | |
| 216 (defun c-crosses-statement-barrier-p (from to) | |
| 217 ;; Does buffer positions FROM to TO cross a C statement boundary? | |
| 218 (let ((here (point)) | |
| 219 (lim from) | |
| 220 crossedp) | |
| 221 (condition-case () | |
| 222 (progn | |
| 223 (goto-char from) | |
| 224 (while (and (not crossedp) | |
| 225 (< (point) to)) | |
| 226 (skip-chars-forward "^;{}:" to) | |
| 227 (if (not (c-in-literal lim)) | |
| 228 (progn | |
| 229 (if (memq (following-char) '(?\; ?{ ?})) | |
| 230 (setq crossedp t) | |
| 231 (if (= (following-char) ?:) | |
| 232 (setq maybe-labelp t)) | |
| 233 (forward-char 1)) | |
| 234 (setq lim (point))) | |
| 235 (forward-char 1)))) | |
| 236 (error (setq crossedp nil))) | |
| 237 (goto-char here) | |
| 238 crossedp)) | |
| 239 | |
| 240 | |
| 241 ;; Skipping of "syntactic whitespace", defined as lexical whitespace, | |
| 242 ;; C and C++ style comments, and preprocessor directives. Search no | |
| 243 ;; farther back or forward than optional LIM. If LIM is omitted, | |
| 244 ;; `beginning-of-defun' is used for backward skipping, point-max is | |
| 245 ;; used for forward skipping. | |
| 246 | |
| 247 (defun c-forward-syntactic-ws (&optional lim) | |
| 248 ;; Forward skip of syntactic whitespace for Emacs 19. | |
| 249 (save-restriction | |
| 250 (let* ((lim (or lim (point-max))) | |
| 251 (here lim) | |
| 252 (hugenum (point-max))) | |
| 253 (narrow-to-region lim (point)) | |
| 254 (while (/= here (point)) | |
| 255 (setq here (point)) | |
| 256 (forward-comment hugenum) | |
| 257 ;; skip preprocessor directives | |
| 258 (if (and (= (following-char) ?#) | |
| 259 (= (c-point 'boi) (point))) | |
| 260 (end-of-line) | |
| 261 ))))) | |
| 262 | |
| 263 (defun c-backward-syntactic-ws (&optional lim) | |
| 264 ;; Backward skip over syntactic whitespace for Emacs 19. | |
| 265 (save-restriction | |
| 266 (let* ((lim (or lim (c-point 'bod))) | |
| 267 (here lim) | |
| 268 (hugenum (- (point-max)))) | |
| 269 (if (< lim (point)) | |
| 270 (progn | |
| 271 (narrow-to-region lim (point)) | |
| 272 (while (/= here (point)) | |
| 273 (setq here (point)) | |
| 274 (forward-comment hugenum) | |
| 275 (if (eq (c-in-literal lim) 'pound) | |
| 276 (beginning-of-line)) | |
| 277 ))) | |
| 278 ))) | |
| 279 | |
| 280 | |
| 281 ;; Return `c' if in a C-style comment, `c++' if in a C++ style | |
| 282 ;; comment, `string' if in a string literal, `pound' if on a | |
| 283 ;; preprocessor line, or nil if not in a comment at all. Optional LIM | |
| 284 ;; is used as the backward limit of the search. If omitted, or nil, | |
| 285 ;; `beginning-of-defun' is used." | |
| 286 | |
| 287 (defun c-in-literal (&optional lim) | |
| 288 ;; Determine if point is in a C++ literal. we cache the last point | |
| 289 ;; calculated if the cache is enabled | |
| 290 (if (and (boundp 'c-in-literal-cache) | |
| 291 c-in-literal-cache | |
| 292 (= (point) (aref c-in-literal-cache 0))) | |
| 293 (aref c-in-literal-cache 1) | |
| 294 (let ((rtn (save-excursion | |
| 295 (let* ((lim (or lim (c-point 'bod))) | |
| 296 (here (point)) | |
| 297 (state (parse-partial-sexp lim (point)))) | |
| 298 (cond | |
| 299 ((nth 3 state) 'string) | |
| 300 ((nth 4 state) (if (nth 7 state) 'c++ 'c)) | |
| 301 ((progn | |
| 302 (goto-char here) | |
| 303 (beginning-of-line) | |
| 304 (looking-at "[ \t]*#")) | |
| 305 'pound) | |
| 306 (t nil)))))) | |
| 307 ;; cache this result if the cache is enabled | |
| 308 (and (boundp 'c-in-literal-cache) | |
| 309 (setq c-in-literal-cache (vector (point) rtn))) | |
| 310 rtn))) | |
| 311 | |
| 312 | |
| 313 ;; utilities for moving and querying around syntactic elements | |
| 314 | |
| 315 (defun c-parse-state () | |
| 316 ;; Finds and records all open parens between some important point | |
| 317 ;; earlier in the file and point. | |
| 318 ;; | |
| 319 ;; if there's a state cache, return it | |
| 320 (if (boundp 'c-state-cache) c-state-cache | |
| 321 (let* (at-bob | |
| 322 (pos (save-excursion | |
| 323 ;; go back 2 bods, but ignore any bogus positions | |
| 324 ;; returned by beginning-of-defun (i.e. open paren | |
| 325 ;; in column zero) | |
| 326 (let ((cnt 2)) | |
| 327 (while (not (or at-bob (zerop cnt))) | |
| 328 (beginning-of-defun) | |
| 329 (if (= (following-char) ?\{) | |
| 330 (setq cnt (1- cnt))) | |
| 331 (if (bobp) | |
| 332 (setq at-bob t)))) | |
| 333 (point))) | |
| 334 (here (save-excursion | |
| 335 ;;(skip-chars-forward " \t}") | |
| 336 (point))) | |
| 337 (last-bod pos) (last-pos pos) | |
| 338 placeholder state sexp-end) | |
| 339 ;; cache last bod position | |
| 340 (while (catch 'backup-bod | |
| 341 (setq state nil) | |
| 342 (while (and pos (< pos here)) | |
| 343 (setq last-pos pos) | |
| 344 (if (and (setq pos (c-safe (scan-lists pos 1 -1))) | |
| 345 (<= pos here)) | |
| 346 (progn | |
| 347 (setq sexp-end (c-safe (scan-sexps (1- pos) 1))) | |
| 348 (if (and sexp-end | |
| 349 (<= sexp-end here)) | |
| 350 ;; we want to record both the start and end | |
| 351 ;; of this sexp, but we only want to record | |
| 352 ;; the last-most of any of them before here | |
| 353 (progn | |
| 354 (if (= (char-after (1- pos)) ?\{) | |
| 355 (setq state (cons (cons (1- pos) sexp-end) | |
| 356 (if (consp (car state)) | |
| 357 (cdr state) | |
| 358 state)))) | |
| 359 (setq pos sexp-end)) | |
| 360 ;; we're contained in this sexp so put pos on | |
| 361 ;; front of list | |
| 362 (setq state (cons (1- pos) state)))) | |
| 363 ;; something bad happened. check to see if we | |
| 364 ;; crossed an unbalanced close brace. if so, we | |
| 365 ;; didn't really find the right `important bufpos' | |
| 366 ;; so lets back up and try again | |
| 367 (if (and (not pos) (not at-bob) | |
| 368 (setq placeholder | |
| 369 (c-safe (scan-lists last-pos 1 1))) | |
| 370 ;;(char-after (1- placeholder)) | |
| 371 (<= placeholder here) | |
| 372 (= (char-after (1- placeholder)) ?\})) | |
| 373 (while t | |
| 374 (setq last-bod (c-safe (scan-lists last-bod -1 1))) | |
| 375 (if (not last-bod) | |
| 376 (error "unbalanced close brace at position %d" | |
| 377 (1- placeholder)) | |
| 378 (setq at-bob (= last-bod (point-min)) | |
| 379 pos last-bod) | |
| 380 (if (= (char-after last-bod) ?\{) | |
| 381 (throw 'backup-bod t))) | |
| 382 )) ;end-if | |
| 383 )) ;end-while | |
| 384 nil)) | |
| 385 state))) | |
| 386 | |
| 387 (defun c-whack-state (bufpos state) | |
| 388 ;; whack off any state information that appears on STATE which lies | |
| 389 ;; after the bounds of BUFPOS. | |
| 390 (let (newstate car) | |
| 391 (while state | |
| 392 (setq car (car state) | |
| 393 state (cdr state)) | |
| 394 (if (consp car) | |
| 395 ;; just check the car, because in a balanced brace | |
| 396 ;; expression, it must be impossible for the corresponding | |
| 397 ;; close brace to be before point, but the open brace to be | |
| 398 ;; after. | |
| 399 (if (<= bufpos (car car)) | |
| 400 nil ; whack it off | |
| 401 ;; its possible that the open brace is before bufpos, but | |
| 402 ;; the close brace is after. In that case, convert this | |
| 403 ;; to a non-cons element. | |
| 404 (if (<= bufpos (cdr car)) | |
| 405 (setq newstate (append newstate (list (car car)))) | |
| 406 ;; we know that both the open and close braces are | |
| 407 ;; before bufpos, so we also know that everything else | |
| 408 ;; on state is before bufpos, so we can glom up the | |
| 409 ;; whole thing and exit. | |
| 410 (setq newstate (append newstate (list car) state) | |
| 411 state nil))) | |
| 412 (if (<= bufpos car) | |
| 413 nil ; whack it off | |
| 414 ;; it's before bufpos, so everything else should too | |
| 415 (setq newstate (append newstate (list car) state) | |
| 416 state nil)))) | |
| 417 newstate)) | |
| 418 | |
| 419 (defun c-hack-state (bufpos which state) | |
| 420 ;; Using BUFPOS buffer position, and WHICH (must be 'open or | |
| 421 ;; 'close), hack the c-parse-state STATE and return the results. | |
| 422 (if (eq which 'open) | |
| 423 (let ((car (car state))) | |
| 424 (if (or (null car) | |
| 425 (consp car) | |
| 426 (/= bufpos car)) | |
| 427 (cons bufpos state) | |
| 428 state)) | |
| 429 (if (not (eq which 'close)) | |
| 430 (error "c-hack-state, bad argument: %s" which)) | |
| 431 ;; 'close brace | |
| 432 (let ((car (car state)) | |
| 433 (cdr (cdr state))) | |
| 434 (if (consp car) | |
| 435 (setq car (car cdr) | |
| 436 cdr (cdr cdr))) | |
| 437 ;; TBD: is this test relevant??? | |
| 438 (if (consp car) | |
| 439 state ;on error, don't change | |
| 440 ;; watch out for balanced expr already on cdr of list | |
| 441 (cons (cons car bufpos) | |
| 442 (if (consp (car cdr)) | |
| 443 (cdr cdr) cdr)) | |
| 444 )))) | |
| 445 | |
| 446 (defun c-adjust-state (from to shift state) | |
| 447 ;; Adjust all points in state that lie in the region FROM..TO by | |
| 448 ;; SHIFT amount (as would be returned by c-indent-line). | |
| 449 (mapcar | |
| 450 (function | |
| 451 (lambda (e) | |
| 452 (if (consp e) | |
| 453 (let ((car (car e)) | |
| 454 (cdr (cdr e))) | |
| 455 (if (and (<= from car) (< car to)) | |
| 456 (setcar e (+ shift car))) | |
| 457 (if (and (<= from cdr) (< cdr to)) | |
| 458 (setcdr e (+ shift cdr)))) | |
| 459 (if (and (<= from e) (< e to)) | |
| 460 (setq e (+ shift e)))) | |
| 461 e)) | |
| 462 state)) | |
| 463 | |
| 464 | |
| 465 (defun c-beginning-of-inheritance-list (&optional lim) | |
| 466 ;; Go to the first non-whitespace after the colon that starts a | |
| 467 ;; multiple inheritance introduction. Optional LIM is the farthest | |
| 468 ;; back we should search. | |
| 469 (let ((lim (or lim (c-point 'bod))) | |
| 470 (placeholder (progn | |
| 471 (back-to-indentation) | |
| 472 (point)))) | |
| 473 (c-backward-syntactic-ws lim) | |
| 474 (while (and (> (point) lim) | |
| 475 (memq (preceding-char) '(?, ?:)) | |
| 476 (progn | |
| 477 (beginning-of-line) | |
| 478 (setq placeholder (point)) | |
| 479 (skip-chars-forward " \t") | |
| 480 (not (looking-at c-class-key)) | |
| 481 )) | |
| 482 (c-backward-syntactic-ws lim)) | |
| 483 (goto-char placeholder) | |
| 484 (skip-chars-forward "^:" (c-point 'eol)))) | |
| 485 | |
| 486 (defun c-beginning-of-macro (&optional lim) | |
| 487 ;; Go to the beginning of the macro. Right now we don't support | |
| 488 ;; multi-line macros too well | |
| 489 (back-to-indentation)) | |
| 490 | |
| 491 (defun c-in-method-def-p () | |
| 492 ;; Return nil if we aren't in a method definition, otherwise the | |
| 493 ;; position of the initial [+-]. | |
| 494 (save-excursion | |
| 495 (beginning-of-line) | |
| 496 (and c-method-key | |
| 497 (looking-at c-method-key) | |
| 498 (point)) | |
| 499 )) | |
| 500 | |
| 501 (defun c-just-after-func-arglist-p (&optional containing) | |
| 502 ;; Return t if we are between a function's argument list closing | |
| 503 ;; paren and its opening brace. Note that the list close brace | |
| 504 ;; could be followed by a "const" specifier or a member init hanging | |
| 505 ;; colon. Optional CONTAINING is position of containing s-exp open | |
| 506 ;; brace. If not supplied, point is used as search start. | |
| 507 (save-excursion | |
| 508 (c-backward-syntactic-ws) | |
| 509 (let ((checkpoint (or containing (point)))) | |
| 510 (goto-char checkpoint) | |
| 511 ;; could be looking at const specifier | |
| 512 (if (and (= (preceding-char) ?t) | |
| 513 (forward-word -1) | |
| 514 (looking-at "\\<const\\>")) | |
| 515 (c-backward-syntactic-ws) | |
| 516 ;; otherwise, we could be looking at a hanging member init | |
| 517 ;; colon | |
| 518 (goto-char checkpoint) | |
| 519 (if (and (= (preceding-char) ?:) | |
| 520 (progn | |
| 521 (forward-char -1) | |
| 522 (c-backward-syntactic-ws) | |
| 523 (looking-at "[ \t\n]*:\\([^:]+\\|$\\)"))) | |
| 524 nil | |
| 525 (goto-char checkpoint)) | |
| 526 ) | |
| 527 (and (= (preceding-char) ?\)) | |
| 528 ;; check if we are looking at a method def | |
| 529 (or (not c-method-key) | |
| 530 (progn | |
| 531 (forward-sexp -1) | |
| 532 (forward-char -1) | |
| 533 (c-backward-syntactic-ws) | |
| 534 (not (or (= (preceding-char) ?-) | |
| 535 (= (preceding-char) ?+) | |
| 536 ;; or a class category | |
| 537 (progn | |
| 538 (forward-sexp -2) | |
| 539 (looking-at c-class-key)) | |
| 540 ))))) | |
| 541 ))) | |
| 542 | |
| 543 ;; defuns to look backwards for things | |
| 544 (defun c-backward-to-start-of-do (&optional lim) | |
| 545 ;; Move to the start of the last "unbalanced" do expression. | |
| 546 ;; Optional LIM is the farthest back to search. If none is found, | |
| 547 ;; nil is returned and point is left unchanged, otherwise t is returned. | |
| 548 (let ((do-level 1) | |
| 549 (case-fold-search nil) | |
| 550 (lim (or lim (c-point 'bod))) | |
| 551 (here (point)) | |
| 552 foundp) | |
| 553 (while (not (zerop do-level)) | |
| 554 ;; we protect this call because trying to execute this when the | |
| 555 ;; while is not associated with a do will throw an error | |
| 556 (condition-case nil | |
| 557 (progn | |
| 558 (backward-sexp 1) | |
| 559 (cond | |
| 560 ((memq (c-in-literal lim) '(c c++))) | |
| 561 ((looking-at "while\\b[^_]") | |
| 562 (setq do-level (1+ do-level))) | |
| 563 ((looking-at "do\\b[^_]") | |
| 564 (if (zerop (setq do-level (1- do-level))) | |
| 565 (setq foundp t))) | |
| 566 ((<= (point) lim) | |
| 567 (setq do-level 0) | |
| 568 (goto-char lim)))) | |
| 569 (error | |
| 570 (goto-char lim) | |
| 571 (setq do-level 0)))) | |
| 572 (if (not foundp) | |
| 573 (goto-char here)) | |
| 574 foundp)) | |
| 575 | |
| 576 (defun c-backward-to-start-of-if (&optional lim) | |
| 577 ;; Move to the start of the last "unbalanced" if and return t. If | |
| 578 ;; none is found, and we are looking at an if clause, nil is | |
| 579 ;; returned. If none is found and we are looking at an else clause, | |
| 580 ;; an error is thrown. | |
| 581 (let ((if-level 1) | |
| 582 (here (c-point 'bol)) | |
| 583 (case-fold-search nil) | |
| 584 (lim (or lim (c-point 'bod))) | |
| 585 (at-if (looking-at "if\\b[^_]"))) | |
| 586 (catch 'orphan-if | |
| 587 (while (and (not (bobp)) | |
| 588 (not (zerop if-level))) | |
| 589 (c-backward-syntactic-ws) | |
| 590 (condition-case nil | |
| 591 (backward-sexp 1) | |
| 592 (error | |
| 593 (if at-if | |
| 594 (throw 'orphan-if nil) | |
| 595 (error "No matching `if' found for `else' on line %d." | |
| 596 (1+ (count-lines 1 here)))))) | |
| 597 (cond | |
| 598 ((looking-at "else\\b[^_]") | |
| 599 (setq if-level (1+ if-level))) | |
| 600 ((looking-at "if\\b[^_]") | |
| 601 ;; check for else if... skip over | |
| 602 (let ((here (point))) | |
| 603 (c-safe (forward-sexp -1)) | |
| 604 (if (looking-at "\\<else\\>[ \t]+\\<if\\>") | |
| 605 nil | |
| 606 (setq if-level (1- if-level)) | |
| 607 (goto-char here)))) | |
| 608 ((< (point) lim) | |
| 609 (setq if-level 0) | |
| 610 (goto-char lim)) | |
| 611 )) | |
| 612 t))) | |
| 613 | |
| 614 (defun c-skip-conditional () | |
| 615 ;; skip forward over conditional at point, including any predicate | |
| 616 ;; statements in parentheses. No error checking is performed. | |
| 617 (forward-sexp (cond | |
| 618 ;; else if() | |
| 619 ((looking-at "\\<else\\>[ \t]+\\<if\\>") 3) | |
| 620 ;; do, else, try, finally | |
| 621 ((looking-at "\\<\\(do\\|else\\|try\\|finally\\)\\>") 1) | |
| 622 ;; for, if, while, switch, catch, synchronized | |
| 623 (t 2)))) | |
| 624 | |
| 625 (defun c-skip-case-statement-forward (state &optional lim) | |
| 626 ;; skip forward over case/default bodies, with optional maximal | |
| 627 ;; limit. if no next case body is found, nil is returned and point | |
| 628 ;; is not moved | |
| 629 (let ((lim (or lim (point-max))) | |
| 630 (here (point)) | |
| 631 donep foundp bufpos | |
| 632 (safepos (point)) | |
| 633 (balanced (car state))) | |
| 634 ;; search until we've passed the limit, or we've found our match | |
| 635 (while (and (< (point) lim) | |
| 636 (not donep)) | |
| 637 (setq safepos (point)) | |
| 638 ;; see if we can find a case statement, not in a literal | |
| 639 (if (and (re-search-forward c-switch-label-key lim 'move) | |
| 640 (setq bufpos (match-beginning 0)) | |
| 641 (not (c-in-literal safepos)) | |
| 642 (/= bufpos here)) | |
| 643 ;; if we crossed into a balanced sexp, we know the case is | |
| 644 ;; not part of our switch statement, so just bound over the | |
| 645 ;; sexp and keep looking. | |
| 646 (if (and (consp balanced) | |
| 647 (> bufpos (car balanced)) | |
| 648 (< bufpos (cdr balanced))) | |
| 649 (goto-char (cdr balanced)) | |
| 650 (goto-char bufpos) | |
| 651 (setq donep t | |
| 652 foundp t)))) | |
| 653 (if (not foundp) | |
| 654 (goto-char here)) | |
| 655 foundp)) | |
| 656 | |
| 657 (defun c-search-uplist-for-classkey (brace-state) | |
| 658 ;; search for the containing class, returning a 2 element vector if | |
| 659 ;; found. aref 0 contains the bufpos of the class key, and aref 1 | |
| 660 ;; contains the bufpos of the open brace. | |
| 661 (if (null brace-state) | |
| 662 ;; no brace-state means we cannot be inside a class | |
| 663 nil | |
| 664 (let ((carcache (car brace-state)) | |
| 665 search-start search-end) | |
| 666 (if (consp carcache) | |
| 667 ;; a cons cell in the first element means that there is some | |
| 668 ;; balanced sexp before the current bufpos. this we can | |
| 669 ;; ignore. the nth 1 and nth 2 elements define for us the | |
| 670 ;; search boundaries | |
| 671 (setq search-start (nth 2 brace-state) | |
| 672 search-end (nth 1 brace-state)) | |
| 673 ;; if the car was not a cons cell then nth 0 and nth 1 define | |
| 674 ;; for us the search boundaries | |
| 675 (setq search-start (nth 1 brace-state) | |
| 676 search-end (nth 0 brace-state))) | |
| 677 ;; search-end cannot be a cons cell | |
| 678 (and (consp search-end) | |
| 679 (error "consp search-end: %s" search-end)) | |
| 680 ;; if search-end is nil, or if the search-end character isn't an | |
| 681 ;; open brace, we are definitely not in a class | |
| 682 (if (or (not search-end) | |
| 683 (< search-end (point-min)) | |
| 684 (/= (char-after search-end) ?{)) | |
| 685 nil | |
| 686 ;; now, we need to look more closely at search-start. if | |
| 687 ;; search-start is nil, then our start boundary is really | |
| 688 ;; point-min. | |
| 689 (if (not search-start) | |
| 690 (setq search-start (point-min)) | |
| 691 ;; if search-start is a cons cell, then we can start | |
| 692 ;; searching from the end of the balanced sexp just ahead of | |
| 693 ;; us | |
| 694 (if (consp search-start) | |
| 695 (setq search-start (cdr search-start)))) | |
| 696 ;; now we can do a quick regexp search from search-start to | |
| 697 ;; search-end and see if we can find a class key. watch for | |
| 698 ;; class like strings in literals | |
| 699 (save-excursion | |
| 700 (save-restriction | |
| 701 (goto-char search-start) | |
| 702 (let ((search-key (concat c-class-key "\\|extern[^_]")) | |
| 703 foundp class match-end) | |
| 704 (while (and (not foundp) | |
| 705 (progn | |
| 706 (c-forward-syntactic-ws) | |
| 707 (> search-end (point))) | |
| 708 (re-search-forward search-key search-end t)) | |
| 709 (setq class (match-beginning 0) | |
| 710 match-end (match-end 0)) | |
| 711 (if (c-in-literal search-start) | |
| 712 nil ; its in a comment or string, ignore | |
| 713 (goto-char class) | |
| 714 (skip-chars-forward " \t\n") | |
| 715 (setq foundp (vector (c-point 'boi) search-end)) | |
| 716 (cond | |
| 717 ;; check for embedded keywords | |
| 718 ((let ((char (char-after (1- class)))) | |
| 719 (and char | |
| 720 (memq (char-syntax char) '(?w ?_)))) | |
| 721 (goto-char match-end) | |
| 722 (setq foundp nil)) | |
| 723 ;; make sure we're really looking at the start of a | |
| 724 ;; class definition, and not a forward decl, return | |
| 725 ;; arg, template arg list, or an ObjC or Java method. | |
| 726 ((and c-method-key | |
| 727 (re-search-forward c-method-key search-end t)) | |
| 728 (setq foundp nil)) | |
| 729 ;; Its impossible to define a regexp for this, and | |
| 730 ;; nearly so to do it programmatically. | |
| 731 ;; | |
| 732 ;; ; picks up forward decls | |
| 733 ;; = picks up init lists | |
| 734 ;; ) picks up return types | |
| 735 ;; > picks up templates, but remember that we can | |
| 736 ;; inherit from templates! | |
| 737 ((let ((skipchars "^;=)")) | |
| 738 ;; try to see if we found the `class' keyword | |
| 739 ;; inside a template arg list | |
| 740 (save-excursion | |
| 741 (skip-chars-backward "^<>" search-start) | |
| 742 (if (= (preceding-char) ?<) | |
| 743 (setq skipchars (concat skipchars ">")))) | |
| 744 (skip-chars-forward skipchars search-end) | |
| 745 (/= (point) search-end)) | |
| 746 (setq foundp nil)) | |
| 747 ))) | |
| 748 foundp)) | |
| 749 ))))) | |
| 750 | |
| 751 (defun c-inside-bracelist-p (containing-sexp brace-state) | |
| 752 ;; return the buffer position of the beginning of the brace list | |
| 753 ;; statement if we're inside a brace list, otherwise return nil. | |
| 754 ;; CONTAINING-SEXP is the buffer pos of the innermost containing | |
| 755 ;; paren. BRACE-STATE is the remainder of the state of enclosing braces | |
| 756 ;; | |
| 757 ;; N.B.: This algorithm can potentially get confused by cpp macros | |
| 758 ;; places in inconvenient locations. Its a trade-off we make for | |
| 759 ;; speed. | |
| 760 (or | |
| 761 ;; this will pick up enum lists | |
| 762 (condition-case () | |
| 763 (save-excursion | |
| 764 (goto-char containing-sexp) | |
| 765 (forward-sexp -1) | |
| 766 (if (or (looking-at "enum[\t\n ]+") | |
| 767 (progn (forward-sexp -1) | |
| 768 (looking-at "enum[\t\n ]+"))) | |
| 769 (point))) | |
| 770 (error nil)) | |
| 771 ;; this will pick up array/aggregate init lists, even if they are nested. | |
| 772 (save-excursion | |
| 773 (let (bufpos failedp) | |
| 774 (while (and (not bufpos) | |
| 775 containing-sexp) | |
| 776 (if (consp containing-sexp) | |
| 777 (setq containing-sexp (car brace-state) | |
| 778 brace-state (cdr brace-state)) | |
| 779 ;; see if significant character just before brace is an equal | |
| 780 (goto-char containing-sexp) | |
| 781 (setq failedp nil) | |
| 782 (condition-case () | |
| 783 (progn | |
| 784 (forward-sexp -1) | |
| 785 (forward-sexp 1) | |
| 786 (c-forward-syntactic-ws containing-sexp)) | |
| 787 (error (setq failedp t))) | |
| 788 (if (or failedp (/= (following-char) ?=)) | |
| 789 ;; lets see if we're nested. find the most nested | |
| 790 ;; containing brace | |
| 791 (setq containing-sexp (car brace-state) | |
| 792 brace-state (cdr brace-state)) | |
| 793 ;; we've hit the beginning of the aggregate list | |
| 794 (c-beginning-of-statement-1 (c-most-enclosing-brace brace-state)) | |
| 795 (setq bufpos (point))) | |
| 796 )) | |
| 797 bufpos)) | |
| 798 )) | |
| 799 | |
| 800 | |
| 801 (defun c-most-enclosing-brace (state) | |
| 802 ;; return the bufpos of the most enclosing brace that hasn't been | |
| 803 ;; narrowed out by any enclosing class, or nil if none was found | |
| 804 (let (enclosingp) | |
| 805 (while (and state (not enclosingp)) | |
| 806 (setq enclosingp (car state) | |
| 807 state (cdr state)) | |
| 808 (if (consp enclosingp) | |
| 809 (setq enclosingp nil) | |
| 810 (if (> (point-min) enclosingp) | |
| 811 (setq enclosingp nil)) | |
| 812 (setq state nil))) | |
| 813 enclosingp)) | |
| 814 | |
| 815 (defun c-least-enclosing-brace (state) | |
| 816 ;; return the bufpos of the least (highest) enclosing brace that | |
| 817 ;; hasn't been narrowed out by any enclosing class, or nil if none | |
| 818 ;; was found. | |
| 819 (c-most-enclosing-brace (nreverse state))) | |
| 820 | |
| 821 (defun c-safe-position (bufpos state) | |
| 822 ;; return the closest known safe position higher up than point | |
| 823 (let ((safepos nil)) | |
| 824 (while state | |
| 825 (setq safepos | |
| 826 (if (consp (car state)) | |
| 827 (cdr (car state)) | |
| 828 (car state))) | |
| 829 (if (< safepos bufpos) | |
| 830 (setq state nil) | |
| 831 (setq state (cdr state)))) | |
| 832 safepos)) | |
| 833 | |
| 834 (defun c-narrow-out-enclosing-class (state lim) | |
| 835 ;; narrow the buffer so that the enclosing class is hidden | |
| 836 (let (inclass-p) | |
| 837 (and state | |
| 838 (setq inclass-p (c-search-uplist-for-classkey state)) | |
| 839 (narrow-to-region | |
| 840 (progn | |
| 841 (goto-char (1+ (aref inclass-p 1))) | |
| 842 (skip-chars-forward " \t\n" lim) | |
| 843 ;; if point is now left of the class opening brace, we're | |
| 844 ;; hosed, so try a different tact | |
| 845 (if (<= (point) (aref inclass-p 1)) | |
| 846 (progn | |
| 847 (goto-char (1+ (aref inclass-p 1))) | |
| 848 (c-forward-syntactic-ws lim))) | |
| 849 (point)) | |
| 850 ;; end point is the end of the current line | |
| 851 (progn | |
| 852 (goto-char lim) | |
| 853 (c-point 'eol)))) | |
| 854 ;; return the class vector | |
| 855 inclass-p)) | |
| 856 | |
| 857 | |
| 858 ;; This function implements the main decision tree for determining the | |
| 859 ;; syntactic analysis of the current line of code. Yes, it's huge and | |
| 860 ;; bloated! | |
| 861 | |
| 862 (defun c-guess-basic-syntax () | |
| 863 (save-excursion | |
| 864 (save-restriction | |
| 865 (beginning-of-line) | |
| 866 (let* ((indent-point (point)) | |
| 867 (case-fold-search nil) | |
| 868 (fullstate (c-parse-state)) | |
| 869 (state fullstate) | |
| 870 (in-method-intro-p (and (eq major-mode 'objc-mode) | |
| 871 c-method-key | |
| 872 (looking-at c-method-key))) | |
| 873 literal containing-sexp char-before-ip char-after-ip lim | |
| 874 syntax placeholder c-in-literal-cache inswitch-p | |
| 875 injava-inher | |
| 876 ;; narrow out any enclosing class or extern "C" block | |
| 877 (inclass-p (c-narrow-out-enclosing-class state indent-point)) | |
| 878 (inextern-p (and inclass-p | |
| 879 (save-excursion | |
| 880 (save-restriction | |
| 881 (widen) | |
| 882 (goto-char (aref inclass-p 0)) | |
| 883 (looking-at "extern[^_]"))))) | |
| 884 ) | |
| 885 | |
| 886 ;; get the buffer position of the most nested opening brace, | |
| 887 ;; if there is one, and it hasn't been narrowed out | |
| 888 (save-excursion | |
| 889 (goto-char indent-point) | |
| 890 (skip-chars-forward " \t}") | |
| 891 (skip-chars-backward " \t") | |
| 892 (while (and state | |
| 893 (not in-method-intro-p) | |
| 894 (not containing-sexp)) | |
| 895 (setq containing-sexp (car state) | |
| 896 state (cdr state)) | |
| 897 (if (consp containing-sexp) | |
| 898 ;; if cdr == point, then containing sexp is the brace | |
| 899 ;; that opens the sexp we close | |
| 900 (if (= (cdr containing-sexp) (point)) | |
| 901 (setq containing-sexp (car containing-sexp)) | |
| 902 ;; otherwise, ignore this element | |
| 903 (setq containing-sexp nil)) | |
| 904 ;; ignore the bufpos if its been narrowed out by the | |
| 905 ;; containing class | |
| 906 (if (<= containing-sexp (point-min)) | |
| 907 (setq containing-sexp nil))))) | |
| 908 | |
| 909 ;; set the limit on the farthest back we need to search | |
| 910 (setq lim (or containing-sexp | |
| 911 (if (consp (car fullstate)) | |
| 912 (cdr (car fullstate)) | |
| 913 nil) | |
| 914 (point-min))) | |
| 915 | |
| 916 ;; cache char before and after indent point, and move point to | |
| 917 ;; the most likely position to perform the majority of tests | |
| 918 (goto-char indent-point) | |
| 919 (skip-chars-forward " \t") | |
| 920 (setq char-after-ip (following-char)) | |
| 921 (c-backward-syntactic-ws lim) | |
| 922 (setq char-before-ip (preceding-char)) | |
| 923 (goto-char indent-point) | |
| 924 (skip-chars-forward " \t") | |
| 925 | |
| 926 ;; are we in a literal? | |
| 927 (setq literal (c-in-literal lim)) | |
| 928 | |
| 929 ;; now figure out syntactic qualities of the current line | |
| 930 (cond | |
| 931 ;; CASE 1: in a string. | |
| 932 ((memq literal '(string)) | |
| 933 (c-add-syntax 'string (c-point 'bopl))) | |
| 934 ;; CASE 2: in a C or C++ style comment. | |
| 935 ((memq literal '(c c++)) | |
| 936 ;; we need to catch multi-paragraph C comments | |
| 937 (while (and (zerop (forward-line -1)) | |
| 938 (looking-at "^[ \t]*$"))) | |
| 939 (c-add-syntax literal (c-point 'boi))) | |
| 940 ;; CASE 3: in a cpp preprocessor | |
| 941 ((eq literal 'pound) | |
| 942 (c-beginning-of-macro lim) | |
| 943 (c-add-syntax 'cpp-macro (c-point 'boi))) | |
| 944 ;; CASE 4: in an objective-c method intro | |
| 945 (in-method-intro-p | |
| 946 (c-add-syntax 'objc-method-intro (c-point 'boi))) | |
| 947 ;; CASE 5: Line is at top level. | |
| 948 ((null containing-sexp) | |
| 949 (cond | |
| 950 ;; CASE 5A: we are looking at a defun, class, or | |
| 951 ;; inline-inclass method opening brace | |
| 952 ((= char-after-ip ?{) | |
| 953 (cond | |
| 954 ;; CASE 5A.1: extern declaration | |
| 955 ((save-excursion | |
| 956 (goto-char indent-point) | |
| 957 (skip-chars-forward " \t") | |
| 958 (and (c-safe (progn (backward-sexp 2) t)) | |
| 959 (looking-at "extern[^_]") | |
| 960 (progn | |
| 961 (setq placeholder (point)) | |
| 962 (forward-sexp 1) | |
| 963 (c-forward-syntactic-ws) | |
| 964 (= (following-char) ?\")))) | |
| 965 (goto-char placeholder) | |
| 966 (c-add-syntax 'extern-lang-open (c-point 'boi))) | |
| 967 ;; CASE 5A.2: we are looking at a class opening brace | |
| 968 ((save-excursion | |
| 969 (goto-char indent-point) | |
| 970 (skip-chars-forward " \t{") | |
| 971 ;; TBD: watch out! there could be a bogus | |
| 972 ;; c-state-cache in place when we get here. we have | |
| 973 ;; to go through much chicanery to ignore the cache. | |
| 974 ;; But of course, there may not be! BLECH! BOGUS! | |
| 975 (let ((decl | |
| 976 (if (boundp 'c-state-cache) | |
| 977 (let ((old-cache c-state-cache)) | |
| 978 (prog2 | |
| 979 (makunbound 'c-state-cache) | |
| 980 (c-search-uplist-for-classkey (c-parse-state)) | |
| 981 (setq c-state-cache old-cache))) | |
| 982 (c-search-uplist-for-classkey (c-parse-state)) | |
| 983 ))) | |
| 984 (and decl | |
| 985 (setq placeholder (aref decl 0))) | |
| 986 )) | |
| 987 (c-add-syntax 'class-open placeholder)) | |
| 988 ;; CASE 5A.3: brace list open | |
| 989 ((save-excursion | |
| 990 (c-beginning-of-statement-1 lim) | |
| 991 ;; c-b-o-s could have left us at point-min | |
| 992 (and (bobp) | |
| 993 (c-forward-syntactic-ws indent-point)) | |
| 994 (if (looking-at "typedef[^_]") | |
| 995 (progn (forward-sexp 1) | |
| 996 (c-forward-syntactic-ws indent-point))) | |
| 997 (setq placeholder (c-point 'boi)) | |
| 998 (and (or (looking-at "enum[ \t\n]+") | |
| 999 (= char-before-ip ?=)) | |
| 1000 (save-excursion | |
| 1001 (skip-chars-forward "^;(" indent-point) | |
| 1002 (not (memq (following-char) '(?\; ?\())) | |
| 1003 ))) | |
| 1004 (c-add-syntax 'brace-list-open placeholder)) | |
| 1005 ;; CASE 5A.4: inline defun open | |
| 1006 ((and inclass-p (not inextern-p)) | |
| 1007 (c-add-syntax 'inline-open) | |
| 1008 (c-add-syntax 'inclass (aref inclass-p 0))) | |
| 1009 ;; CASE 5A.5: ordinary defun open | |
| 1010 (t | |
| 1011 (goto-char placeholder) | |
| 1012 (c-add-syntax 'defun-open (c-point 'bol)) | |
| 1013 ))) | |
| 1014 ;; CASE 5B: first K&R arg decl or member init | |
| 1015 ((c-just-after-func-arglist-p) | |
| 1016 (cond | |
| 1017 ;; CASE 5B.1: a member init | |
| 1018 ((or (= char-before-ip ?:) | |
| 1019 (= char-after-ip ?:)) | |
| 1020 ;; this line should be indented relative to the beginning | |
| 1021 ;; of indentation for the topmost-intro line that contains | |
| 1022 ;; the prototype's open paren | |
| 1023 ;; TBD: is the following redundant? | |
| 1024 (if (= char-before-ip ?:) | |
| 1025 (forward-char -1)) | |
| 1026 (c-backward-syntactic-ws lim) | |
| 1027 ;; TBD: is the preceding redundant? | |
| 1028 (if (= (preceding-char) ?:) | |
| 1029 (progn (forward-char -1) | |
| 1030 (c-backward-syntactic-ws lim))) | |
| 1031 (if (= (preceding-char) ?\)) | |
| 1032 (backward-sexp 1)) | |
| 1033 (setq placeholder (point)) | |
| 1034 (save-excursion | |
| 1035 (and (c-safe (backward-sexp 1) t) | |
| 1036 (looking-at "throw[^_]") | |
| 1037 (c-safe (backward-sexp 1) t) | |
| 1038 (setq placeholder (point)))) | |
| 1039 (goto-char placeholder) | |
| 1040 (c-add-syntax 'member-init-intro (c-point 'boi)) | |
| 1041 ;; we don't need to add any class offset since this | |
| 1042 ;; should be relative to the ctor's indentation | |
| 1043 ) | |
| 1044 ;; CASE 5B.2: K&R arg decl intro | |
| 1045 (c-recognize-knr-p | |
| 1046 (c-add-syntax 'knr-argdecl-intro (c-point 'boi)) | |
| 1047 (and inclass-p (c-add-syntax 'inclass (aref inclass-p 0)))) | |
| 1048 ;; CASE 5B.3: Nether region after a C++ or Java func | |
| 1049 ;; decl, which could include a `throws' declaration. | |
| 1050 (t | |
| 1051 (c-beginning-of-statement-1 lim) | |
| 1052 (c-add-syntax 'func-decl-cont (c-point 'boi)) | |
| 1053 ))) | |
| 1054 ;; CASE 5C: inheritance line. could be first inheritance | |
| 1055 ;; line, or continuation of a multiple inheritance | |
| 1056 ((or (and c-baseclass-key (looking-at c-baseclass-key)) | |
| 1057 (and (or (= char-before-ip ?:) | |
| 1058 ;; watch out for scope operator | |
| 1059 (save-excursion | |
| 1060 (and (= char-after-ip ?:) | |
| 1061 (c-safe (progn (forward-char 1) t)) | |
| 1062 (/= (following-char) ?:) | |
| 1063 ))) | |
| 1064 (save-excursion | |
| 1065 (c-backward-syntactic-ws lim) | |
| 1066 (if (= char-before-ip ?:) | |
| 1067 (progn | |
| 1068 (forward-char -1) | |
| 1069 (c-backward-syntactic-ws lim))) | |
| 1070 (back-to-indentation) | |
| 1071 (looking-at c-class-key))) | |
| 1072 ;; for Java | |
| 1073 (and (eq major-mode 'java-mode) | |
| 1074 (let ((fence (save-excursion | |
| 1075 (c-beginning-of-statement-1 lim) | |
| 1076 (point))) | |
| 1077 cont done) | |
| 1078 (save-excursion | |
| 1079 (while (not done) | |
| 1080 (cond ((looking-at c-Java-special-key) | |
| 1081 (setq injava-inher (cons cont (point)) | |
| 1082 done t)) | |
| 1083 ((or (not (c-safe (forward-sexp -1) t)) | |
| 1084 (<= (point) fence)) | |
| 1085 (setq done t)) | |
| 1086 ) | |
| 1087 (setq cont t))) | |
| 1088 injava-inher) | |
| 1089 (not (c-crosses-statement-barrier-p (cdr injava-inher) | |
| 1090 (point))) | |
| 1091 )) | |
| 1092 (cond | |
| 1093 ;; CASE 5C.1: non-hanging colon on an inher intro | |
| 1094 ((= char-after-ip ?:) | |
| 1095 (c-backward-syntactic-ws lim) | |
| 1096 (c-add-syntax 'inher-intro (c-point 'boi)) | |
| 1097 ;; don't add inclass symbol since relative point already | |
| 1098 ;; contains any class offset | |
| 1099 ) | |
| 1100 ;; CASE 5C.2: hanging colon on an inher intro | |
| 1101 ((= char-before-ip ?:) | |
| 1102 (c-add-syntax 'inher-intro (c-point 'boi)) | |
| 1103 (and inclass-p (c-add-syntax 'inclass (aref inclass-p 0)))) | |
| 1104 ;; CASE 5C.3: in a Java implements/extends | |
| 1105 (injava-inher | |
| 1106 (let ((where (cdr injava-inher)) | |
| 1107 (cont (car injava-inher))) | |
| 1108 (goto-char where) | |
| 1109 (cond ((looking-at "throws[ \t\n]") | |
| 1110 (c-add-syntax 'func-decl-cont | |
| 1111 (progn (c-beginning-of-statement-1 lim) | |
| 1112 (c-point 'boi)))) | |
| 1113 (cont (c-add-syntax 'inher-cont where)) | |
| 1114 (t (c-add-syntax 'inher-intro | |
| 1115 (progn (goto-char (cdr injava-inher)) | |
| 1116 (c-beginning-of-statement-1 lim) | |
| 1117 (point)))) | |
| 1118 ))) | |
| 1119 ;; CASE 5C.4: a continued inheritance line | |
| 1120 (t | |
| 1121 (c-beginning-of-inheritance-list lim) | |
| 1122 (c-add-syntax 'inher-cont (point)) | |
| 1123 ;; don't add inclass symbol since relative point already | |
| 1124 ;; contains any class offset | |
| 1125 ))) | |
| 1126 ;; CASE 5D: this could be a top-level compound statement or a | |
| 1127 ;; member init list continuation | |
| 1128 ((= char-before-ip ?,) | |
| 1129 (goto-char indent-point) | |
| 1130 (c-backward-syntactic-ws lim) | |
| 1131 (while (and (< lim (point)) | |
| 1132 (= (preceding-char) ?,)) | |
| 1133 ;; this will catch member inits with multiple | |
| 1134 ;; line arglists | |
| 1135 (forward-char -1) | |
| 1136 (c-backward-syntactic-ws (c-point 'bol)) | |
| 1137 (if (= (preceding-char) ?\)) | |
| 1138 (backward-sexp 1)) | |
| 1139 ;; now continue checking | |
| 1140 (beginning-of-line) | |
| 1141 (c-backward-syntactic-ws lim)) | |
| 1142 (cond | |
| 1143 ;; CASE 5D.1: hanging member init colon, but watch out | |
| 1144 ;; for bogus matches on access specifiers inside classes. | |
| 1145 ((and (= (preceding-char) ?:) | |
| 1146 (save-excursion | |
| 1147 (forward-word -1) | |
| 1148 (not (looking-at c-access-key)))) | |
| 1149 (goto-char indent-point) | |
| 1150 (c-backward-syntactic-ws lim) | |
| 1151 (c-safe (backward-sexp 1)) | |
| 1152 (c-add-syntax 'member-init-cont (c-point 'boi)) | |
| 1153 ;; we do not need to add class offset since relative | |
| 1154 ;; point is the member init above us | |
| 1155 ) | |
| 1156 ;; CASE 5D.2: non-hanging member init colon | |
| 1157 ((progn | |
| 1158 (c-forward-syntactic-ws indent-point) | |
| 1159 (= (following-char) ?:)) | |
| 1160 (skip-chars-forward " \t:") | |
| 1161 (c-add-syntax 'member-init-cont (point))) | |
| 1162 ;; CASE 5D.3: perhaps a multiple inheritance line? | |
| 1163 ((looking-at c-inher-key) | |
| 1164 (c-add-syntax 'inher-cont (c-point 'boi))) | |
| 1165 ;; CASE 5D.4: perhaps a template list continuation? | |
| 1166 ((save-excursion | |
| 1167 (skip-chars-backward "^<" lim) | |
| 1168 ;; not sure if this is the right test, but it should | |
| 1169 ;; be fast and mostly accurate. | |
| 1170 (and (= (preceding-char) ?<) | |
| 1171 (not (c-in-literal lim)))) | |
| 1172 ;; we can probably indent it just like and arglist-cont | |
| 1173 (c-add-syntax 'arglist-cont (point))) | |
| 1174 ;; CASE 5D.5: perhaps a top-level statement-cont | |
| 1175 (t | |
| 1176 (c-beginning-of-statement-1 lim) | |
| 1177 ;; skip over any access-specifiers | |
| 1178 (and inclass-p c-access-key | |
| 1179 (while (looking-at c-access-key) | |
| 1180 (forward-line 1))) | |
| 1181 ;; skip over comments, whitespace | |
| 1182 (c-forward-syntactic-ws indent-point) | |
| 1183 (c-add-syntax 'statement-cont (c-point 'boi))) | |
| 1184 )) | |
| 1185 ;; CASE 5E: we are looking at a access specifier | |
| 1186 ((and inclass-p | |
| 1187 c-access-key | |
| 1188 (looking-at c-access-key)) | |
| 1189 (c-add-syntax 'access-label (c-point 'bonl)) | |
| 1190 (c-add-syntax 'inclass (aref inclass-p 0))) | |
| 1191 ;; CASE 5F: extern-lang-close? | |
| 1192 ((and inextern-p | |
| 1193 (= char-after-ip ?})) | |
| 1194 (c-add-syntax 'extern-lang-close (aref inclass-p 1))) | |
| 1195 ;; CASE 5G: we are looking at the brace which closes the | |
| 1196 ;; enclosing nested class decl | |
| 1197 ((and inclass-p | |
| 1198 (= char-after-ip ?}) | |
| 1199 (save-excursion | |
| 1200 (save-restriction | |
| 1201 (widen) | |
| 1202 (forward-char 1) | |
| 1203 (and | |
| 1204 (condition-case nil | |
| 1205 (progn (backward-sexp 1) t) | |
| 1206 (error nil)) | |
| 1207 (= (point) (aref inclass-p 1)) | |
| 1208 )))) | |
| 1209 (save-restriction | |
| 1210 (widen) | |
| 1211 (goto-char (aref inclass-p 0)) | |
| 1212 (c-add-syntax 'class-close (c-point 'boi)))) | |
| 1213 ;; CASE 5H: we could be looking at subsequent knr-argdecls | |
| 1214 ((and c-recognize-knr-p | |
| 1215 ;; here we essentially use the hack that is used in | |
| 1216 ;; Emacs' c-mode.el to limit how far back we should | |
| 1217 ;; look. The assumption is made that argdecls are | |
| 1218 ;; indented at least one space and that function | |
| 1219 ;; headers are not indented. | |
| 1220 (let ((limit (save-excursion | |
| 1221 (re-search-backward "^[^ \^L\t\n#]" nil 'move) | |
| 1222 (point)))) | |
| 1223 (save-excursion | |
| 1224 (c-backward-syntactic-ws limit) | |
| 1225 (setq placeholder (point)) | |
| 1226 (while (and (memq (preceding-char) '(?\; ?,)) | |
| 1227 (> (point) limit)) | |
| 1228 (beginning-of-line) | |
| 1229 (setq placeholder (point)) | |
| 1230 (c-backward-syntactic-ws limit)) | |
| 1231 (and (= (preceding-char) ?\)) | |
| 1232 (or (not c-method-key) | |
| 1233 (progn | |
| 1234 (forward-sexp -1) | |
| 1235 (forward-char -1) | |
| 1236 (c-backward-syntactic-ws) | |
| 1237 (not (or (= (preceding-char) ?-) | |
| 1238 (= (preceding-char) ?+) | |
| 1239 ;; or a class category | |
| 1240 (progn | |
| 1241 (forward-sexp -2) | |
| 1242 (looking-at c-class-key)) | |
| 1243 ))))) | |
| 1244 )) | |
| 1245 (save-excursion | |
| 1246 (c-beginning-of-statement-1) | |
| 1247 (not (looking-at "typedef[ \t\n]+")))) | |
| 1248 (goto-char placeholder) | |
| 1249 (c-add-syntax 'knr-argdecl (c-point 'boi))) | |
| 1250 ;; CASE 5I: we are at the topmost level, make sure we skip | |
| 1251 ;; back past any access specifiers | |
| 1252 ((progn | |
| 1253 (c-backward-syntactic-ws lim) | |
| 1254 (while (and inclass-p | |
| 1255 c-access-key | |
| 1256 (not (bobp)) | |
| 1257 (save-excursion | |
| 1258 (c-safe (progn (backward-sexp 1) t)) | |
| 1259 (looking-at c-access-key))) | |
| 1260 (backward-sexp 1) | |
| 1261 (c-backward-syntactic-ws lim)) | |
| 1262 (or (bobp) | |
| 1263 (memq (preceding-char) '(?\; ?\})))) | |
| 1264 ;; real beginning-of-line could be narrowed out due to | |
| 1265 ;; enclosure in a class block | |
| 1266 (save-restriction | |
| 1267 (widen) | |
| 1268 (c-add-syntax 'topmost-intro (c-point 'bol)) | |
| 1269 (if inclass-p | |
| 1270 (progn | |
| 1271 (goto-char (aref inclass-p 1)) | |
| 1272 (if inextern-p | |
| 1273 (c-add-syntax 'inextern-lang) | |
| 1274 (c-add-syntax 'inclass (c-point 'boi))))) | |
| 1275 )) | |
| 1276 ;; CASE 5J: we are at an ObjC or Java method definition | |
| 1277 ;; continuation line. | |
| 1278 ((and c-method-key | |
| 1279 (progn | |
| 1280 (c-beginning-of-statement-1 lim) | |
| 1281 (beginning-of-line) | |
| 1282 (looking-at c-method-key))) | |
| 1283 (c-add-syntax 'objc-method-args-cont (point))) | |
| 1284 ;; CASE 5K: we are at a topmost continuation line | |
| 1285 (t | |
| 1286 (c-beginning-of-statement-1 lim) | |
| 1287 (c-forward-syntactic-ws) | |
| 1288 (c-add-syntax 'topmost-intro-cont (c-point 'boi))) | |
| 1289 )) ; end CASE 5 | |
| 1290 ;; CASE 6: line is an expression, not a statement. Most | |
| 1291 ;; likely we are either in a function prototype or a function | |
| 1292 ;; call argument list | |
| 1293 ((/= (char-after containing-sexp) ?{) | |
| 1294 (c-backward-syntactic-ws containing-sexp) | |
| 1295 (cond | |
| 1296 ;; CASE 6A: we are looking at the arglist closing paren | |
| 1297 ((and (/= char-before-ip ?,) | |
| 1298 (memq char-after-ip '(?\) ?\]))) | |
| 1299 (goto-char containing-sexp) | |
| 1300 (c-add-syntax 'arglist-close (c-point 'boi))) | |
| 1301 ;; CASE 6B: we are looking at the first argument in an empty | |
| 1302 ;; argument list. Use arglist-close if we're actually | |
| 1303 ;; looking at a close paren or bracket. | |
| 1304 ((memq char-before-ip '(?\( ?\[)) | |
| 1305 (goto-char containing-sexp) | |
| 1306 (c-add-syntax 'arglist-intro (c-point 'boi))) | |
| 1307 ;; CASE 6C: we are inside a conditional test clause. treat | |
| 1308 ;; these things as statements | |
| 1309 ((save-excursion | |
| 1310 (goto-char containing-sexp) | |
| 1311 (and (c-safe (progn (forward-sexp -1) t)) | |
| 1312 (looking-at "\\<for\\>[^_]"))) | |
| 1313 (goto-char (1+ containing-sexp)) | |
| 1314 (c-forward-syntactic-ws indent-point) | |
| 1315 (c-beginning-of-statement-1 containing-sexp) | |
| 1316 (if (= char-before-ip ?\;) | |
| 1317 (c-add-syntax 'statement (point)) | |
| 1318 (c-add-syntax 'statement-cont (point)) | |
| 1319 )) | |
| 1320 ;; CASE 6D: maybe a continued method call. This is the case | |
| 1321 ;; when we are inside a [] bracketed exp, and what precede | |
| 1322 ;; the opening bracket is not an identifier. | |
| 1323 ((and c-method-key | |
| 1324 (= (char-after containing-sexp) ?\[) | |
| 1325 (save-excursion | |
| 1326 (goto-char (1- containing-sexp)) | |
| 1327 (c-backward-syntactic-ws (c-point 'bod)) | |
| 1328 (if (not (looking-at c-symbol-key)) | |
| 1329 (c-add-syntax 'objc-method-call-cont containing-sexp)) | |
| 1330 ))) | |
| 1331 ;; CASE 6E: we are looking at an arglist continuation line, | |
| 1332 ;; but the preceding argument is on the same line as the | |
| 1333 ;; opening paren. This case includes multi-line | |
| 1334 ;; mathematical paren groupings, but we could be on a | |
| 1335 ;; for-list continuation line | |
| 1336 ((and (save-excursion | |
| 1337 (goto-char (1+ containing-sexp)) | |
| 1338 (skip-chars-forward " \t") | |
| 1339 (not (eolp))) | |
| 1340 (save-excursion | |
| 1341 (c-beginning-of-statement-1 lim) | |
| 1342 (skip-chars-backward " \t([") | |
| 1343 (<= (point) containing-sexp))) | |
| 1344 (goto-char containing-sexp) | |
| 1345 (c-add-syntax 'arglist-cont-nonempty (c-point 'boi))) | |
| 1346 ;; CASE 6F: we are looking at just a normal arglist | |
| 1347 ;; continuation line | |
| 1348 (t (c-beginning-of-statement-1 containing-sexp) | |
| 1349 (forward-char 1) | |
| 1350 (c-forward-syntactic-ws indent-point) | |
| 1351 (c-add-syntax 'arglist-cont (c-point 'boi))) | |
| 1352 )) | |
| 1353 ;; CASE 7: func-local multi-inheritance line | |
| 1354 ((and c-baseclass-key | |
| 1355 (save-excursion | |
| 1356 (goto-char indent-point) | |
| 1357 (skip-chars-forward " \t") | |
| 1358 (looking-at c-baseclass-key))) | |
| 1359 (goto-char indent-point) | |
| 1360 (skip-chars-forward " \t") | |
| 1361 (cond | |
| 1362 ;; CASE 7A: non-hanging colon on an inher intro | |
| 1363 ((= char-after-ip ?:) | |
| 1364 (c-backward-syntactic-ws lim) | |
| 1365 (c-add-syntax 'inher-intro (c-point 'boi))) | |
| 1366 ;; CASE 7B: hanging colon on an inher intro | |
| 1367 ((= char-before-ip ?:) | |
| 1368 (c-add-syntax 'inher-intro (c-point 'boi))) | |
| 1369 ;; CASE 7C: a continued inheritance line | |
| 1370 (t | |
| 1371 (c-beginning-of-inheritance-list lim) | |
| 1372 (c-add-syntax 'inher-cont (point)) | |
| 1373 ))) | |
| 1374 ;; CASE 8: we are inside a brace-list | |
| 1375 ((setq placeholder (c-inside-bracelist-p containing-sexp state)) | |
| 1376 (cond | |
| 1377 ;; CASE 8A: brace-list-close brace | |
| 1378 ((and (= char-after-ip ?}) | |
| 1379 (c-safe (progn (forward-char 1) | |
| 1380 (backward-sexp 1) | |
| 1381 t)) | |
| 1382 (= (point) containing-sexp)) | |
| 1383 (c-add-syntax 'brace-list-close (c-point 'boi))) | |
| 1384 ;; CASE 8B: we're looking at the first line in a brace-list | |
| 1385 ((save-excursion | |
| 1386 (goto-char indent-point) | |
| 1387 (c-backward-syntactic-ws containing-sexp) | |
| 1388 (= (point) (1+ containing-sexp))) | |
| 1389 (goto-char containing-sexp) | |
| 1390 ;;(if (= char-after-ip ?{) | |
| 1391 ;;(c-add-syntax 'brace-list-open (c-point 'boi)) | |
| 1392 (c-add-syntax 'brace-list-intro (c-point 'boi)) | |
| 1393 ) | |
| 1394 ;;)) ; end CASE 8B | |
| 1395 ;; CASE 8C: this is just a later brace-list-entry | |
| 1396 (t (goto-char (1+ containing-sexp)) | |
| 1397 (c-forward-syntactic-ws indent-point) | |
| 1398 (if (= char-after-ip ?{) | |
| 1399 (c-add-syntax 'brace-list-open (point)) | |
| 1400 (c-add-syntax 'brace-list-entry (point)) | |
| 1401 )) ; end CASE 8C | |
| 1402 )) ; end CASE 8 | |
| 1403 ;; CASE 9: A continued statement | |
| 1404 ((and (not (memq char-before-ip '(?\; ?} ?:))) | |
| 1405 (> (point) | |
| 1406 (save-excursion | |
| 1407 (c-beginning-of-statement-1 containing-sexp) | |
| 1408 (setq placeholder (point)))) | |
| 1409 (/= placeholder containing-sexp)) | |
| 1410 (goto-char indent-point) | |
| 1411 (skip-chars-forward " \t") | |
| 1412 (let ((after-cond-placeholder | |
| 1413 (save-excursion | |
| 1414 (goto-char placeholder) | |
| 1415 (if (looking-at c-conditional-key) | |
| 1416 (progn | |
| 1417 (c-safe (c-skip-conditional)) | |
| 1418 (c-forward-syntactic-ws) | |
| 1419 (if (memq (following-char) '(?\;)) | |
| 1420 (progn | |
| 1421 (forward-char 1) | |
| 1422 (c-forward-syntactic-ws))) | |
| 1423 (point)) | |
| 1424 nil)))) | |
| 1425 (cond | |
| 1426 ;; CASE 9A: substatement | |
| 1427 ((and after-cond-placeholder | |
| 1428 (>= after-cond-placeholder indent-point)) | |
| 1429 (goto-char placeholder) | |
| 1430 (if (= char-after-ip ?{) | |
| 1431 (c-add-syntax 'substatement-open (c-point 'boi)) | |
| 1432 (c-add-syntax 'substatement (c-point 'boi)))) | |
| 1433 ;; CASE 9B: open braces for class or brace-lists | |
| 1434 ((= char-after-ip ?{) | |
| 1435 (cond | |
| 1436 ;; CASE 9B.1: class-open | |
| 1437 ((save-excursion | |
| 1438 (goto-char indent-point) | |
| 1439 (skip-chars-forward " \t{") | |
| 1440 (let ((decl (c-search-uplist-for-classkey (c-parse-state)))) | |
| 1441 (and decl | |
| 1442 (setq placeholder (aref decl 0))) | |
| 1443 )) | |
| 1444 (c-add-syntax 'class-open placeholder)) | |
| 1445 ;; CASE 9B.2: brace-list-open | |
| 1446 ((or (save-excursion | |
| 1447 (goto-char placeholder) | |
| 1448 (looking-at "\\<enum\\>")) | |
| 1449 (= char-before-ip ?=)) | |
| 1450 (c-add-syntax 'brace-list-open placeholder)) | |
| 1451 ;; CASE 9B.3: catch-all for unknown construct. | |
| 1452 (t | |
| 1453 ;; Can and should I add an extensibility hook here? | |
| 1454 ;; Something like c-recognize-hook so support for | |
| 1455 ;; unknown constructs could be added. It's probably a | |
| 1456 ;; losing proposition, so I dunno. | |
| 1457 (goto-char placeholder) | |
| 1458 (c-add-syntax 'statement-cont (c-point 'boi)) | |
| 1459 (c-add-syntax 'block-open)) | |
| 1460 )) | |
| 1461 ;; CASE 9C: iostream insertion or extraction operator | |
| 1462 ((looking-at "<<\\|>>") | |
| 1463 (goto-char placeholder) | |
| 1464 (and after-cond-placeholder | |
| 1465 (goto-char after-cond-placeholder)) | |
| 1466 (while (and (re-search-forward "<<\\|>>" indent-point 'move) | |
| 1467 (c-in-literal placeholder))) | |
| 1468 ;; if we ended up at indent-point, then the first | |
| 1469 ;; streamop is on a separate line. Indent the line like | |
| 1470 ;; a statement-cont instead | |
| 1471 (if (/= (point) indent-point) | |
| 1472 (c-add-syntax 'stream-op (c-point 'boi)) | |
| 1473 (c-backward-syntactic-ws lim) | |
| 1474 (c-add-syntax 'statement-cont (c-point 'boi)))) | |
| 1475 ;; CASE 9D: continued statement. find the accurate | |
| 1476 ;; beginning of statement or substatement | |
| 1477 (t | |
| 1478 (c-beginning-of-statement-1 after-cond-placeholder) | |
| 1479 ;; KLUDGE ALERT! c-beginning-of-statement-1 can leave | |
| 1480 ;; us before the lim we're passing in. It should be | |
| 1481 ;; fixed, but I'm worried about side-effects at this | |
| 1482 ;; late date. Fix for v5. | |
| 1483 (goto-char (or (and after-cond-placeholder | |
| 1484 (max after-cond-placeholder (point))) | |
| 1485 (point))) | |
| 1486 (c-add-syntax 'statement-cont (point))) | |
| 1487 ))) | |
| 1488 ;; CASE 10: an else clause? | |
| 1489 ((looking-at "\\<else\\>[^_]") | |
| 1490 (c-backward-to-start-of-if containing-sexp) | |
| 1491 (c-add-syntax 'else-clause (c-point 'boi))) | |
| 1492 ;; CASE 11: Statement. But what kind? Lets see if its a | |
| 1493 ;; while closure of a do/while construct | |
| 1494 ((progn | |
| 1495 (goto-char indent-point) | |
| 1496 (skip-chars-forward " \t") | |
| 1497 (and (looking-at "while\\b[^_]") | |
| 1498 (save-excursion | |
| 1499 (c-backward-to-start-of-do containing-sexp) | |
| 1500 (setq placeholder (point)) | |
| 1501 (looking-at "do\\b[^_]")) | |
| 1502 )) | |
| 1503 (c-add-syntax 'do-while-closure placeholder)) | |
| 1504 ;; CASE 12: A case or default label | |
| 1505 ((looking-at c-switch-label-key) | |
| 1506 (goto-char containing-sexp) | |
| 1507 ;; check for hanging braces | |
| 1508 (if (/= (point) (c-point 'boi)) | |
| 1509 (forward-sexp -1)) | |
| 1510 (c-add-syntax 'case-label (c-point 'boi))) | |
| 1511 ;; CASE 13: any other label | |
| 1512 ((looking-at c-label-key) | |
| 1513 (goto-char containing-sexp) | |
| 1514 (c-add-syntax 'label (c-point 'boi))) | |
| 1515 ;; CASE 14: block close brace, possibly closing the defun or | |
| 1516 ;; the class | |
| 1517 ((= char-after-ip ?}) | |
| 1518 (let* ((lim (c-safe-position containing-sexp fullstate)) | |
| 1519 (relpos (save-excursion | |
| 1520 (goto-char containing-sexp) | |
| 1521 (if (/= (point) (c-point 'boi)) | |
| 1522 (c-beginning-of-statement-1 lim)) | |
| 1523 (c-point 'boi)))) | |
| 1524 (cond | |
| 1525 ;; CASE 14A: does this close an inline? | |
| 1526 ((let ((inclass-p (progn | |
| 1527 (goto-char containing-sexp) | |
| 1528 (c-search-uplist-for-classkey state)))) | |
| 1529 ;; inextern-p in higher level let* | |
| 1530 (setq inextern-p (and inclass-p | |
| 1531 (progn | |
| 1532 (goto-char (aref inclass-p 0)) | |
| 1533 (looking-at "extern[^_]")))) | |
| 1534 (and inclass-p (not inextern-p))) | |
| 1535 (c-add-syntax 'inline-close relpos)) | |
| 1536 ;; CASE 14B: if there an enclosing brace that hasn't | |
| 1537 ;; been narrowed out by a class, then this is a | |
| 1538 ;; block-close | |
| 1539 ((and (not inextern-p) | |
| 1540 (c-most-enclosing-brace state)) | |
| 1541 (c-add-syntax 'block-close relpos)) | |
| 1542 ;; CASE 14C: find out whether we're closing a top-level | |
| 1543 ;; class or a defun | |
| 1544 (t | |
| 1545 (save-restriction | |
| 1546 (narrow-to-region (point-min) indent-point) | |
| 1547 (let ((decl (c-search-uplist-for-classkey (c-parse-state)))) | |
| 1548 (if decl | |
| 1549 (c-add-syntax 'class-close (aref decl 0)) | |
| 1550 (c-add-syntax 'defun-close relpos))))) | |
| 1551 ))) | |
| 1552 ;; CASE 15: statement catchall | |
| 1553 (t | |
| 1554 ;; we know its a statement, but we need to find out if it is | |
| 1555 ;; the first statement in a block | |
| 1556 (goto-char containing-sexp) | |
| 1557 (forward-char 1) | |
| 1558 (c-forward-syntactic-ws indent-point) | |
| 1559 ;; now skip forward past any case/default clauses we might find. | |
| 1560 (while (or (c-skip-case-statement-forward fullstate indent-point) | |
| 1561 (and (looking-at c-switch-label-key) | |
| 1562 (not inswitch-p))) | |
| 1563 (setq inswitch-p t)) | |
| 1564 ;; we want to ignore non-case labels when skipping forward | |
| 1565 (while (and (looking-at c-label-key) | |
| 1566 (goto-char (match-end 0))) | |
| 1567 (c-forward-syntactic-ws indent-point)) | |
| 1568 (cond | |
| 1569 ;; CASE 15A: we are inside a case/default clause inside a | |
| 1570 ;; switch statement. find out if we are at the statement | |
| 1571 ;; just after the case/default label. | |
| 1572 ((and inswitch-p | |
| 1573 (progn | |
| 1574 (goto-char indent-point) | |
| 1575 (c-backward-syntactic-ws containing-sexp) | |
| 1576 (back-to-indentation) | |
| 1577 (setq placeholder (point)) | |
| 1578 (looking-at c-switch-label-key))) | |
| 1579 (goto-char indent-point) | |
| 1580 (skip-chars-forward " \t") | |
| 1581 (if (= (following-char) ?{) | |
| 1582 (c-add-syntax 'statement-case-open placeholder) | |
| 1583 (c-add-syntax 'statement-case-intro placeholder))) | |
| 1584 ;; CASE 15B: continued statement | |
| 1585 ((= char-before-ip ?,) | |
| 1586 (c-add-syntax 'statement-cont (c-point 'boi))) | |
| 1587 ;; CASE 15C: a question/colon construct? But make sure | |
| 1588 ;; what came before was not a label, and what comes after | |
| 1589 ;; is not a globally scoped function call! | |
| 1590 ((or (and (memq char-before-ip '(?: ??)) | |
| 1591 (save-excursion | |
| 1592 (goto-char indent-point) | |
| 1593 (c-backward-syntactic-ws lim) | |
| 1594 (back-to-indentation) | |
| 1595 (not (looking-at c-label-key)))) | |
| 1596 (and (memq char-after-ip '(?: ??)) | |
| 1597 (save-excursion | |
| 1598 (goto-char indent-point) | |
| 1599 (skip-chars-forward " \t") | |
| 1600 ;; watch out for scope operator | |
| 1601 (not (looking-at "::"))))) | |
| 1602 (c-add-syntax 'statement-cont (c-point 'boi))) | |
| 1603 ;; CASE 15D: any old statement | |
| 1604 ((< (point) indent-point) | |
| 1605 (let ((safepos (c-most-enclosing-brace fullstate)) | |
| 1606 relpos done) | |
| 1607 (goto-char indent-point) | |
| 1608 (c-beginning-of-statement-1 safepos) | |
| 1609 ;; It is possible we're on the brace that opens a nested | |
| 1610 ;; function. | |
| 1611 (if (and (= (following-char) ?{) | |
| 1612 (save-excursion | |
| 1613 (c-backward-syntactic-ws safepos) | |
| 1614 (/= (preceding-char) ?\;))) | |
| 1615 (c-beginning-of-statement-1 safepos)) | |
| 1616 (if (and inswitch-p | |
| 1617 (looking-at c-switch-label-key)) | |
| 1618 (progn | |
| 1619 (goto-char placeholder) | |
| 1620 (end-of-line) | |
| 1621 (forward-sexp -1))) | |
| 1622 (setq relpos (c-point 'boi)) | |
| 1623 (while (and (not done) | |
| 1624 (<= safepos (point)) | |
| 1625 (/= relpos (point))) | |
| 1626 (c-beginning-of-statement-1 safepos) | |
| 1627 (if (= relpos (c-point 'boi)) | |
| 1628 (setq done t)) | |
| 1629 (setq relpos (c-point 'boi))) | |
| 1630 (c-add-syntax 'statement relpos) | |
| 1631 (if (= char-after-ip ?{) | |
| 1632 (c-add-syntax 'block-open)))) | |
| 1633 ;; CASE 15E: first statement in an inline, or first | |
| 1634 ;; statement in a top-level defun. we can tell this is it | |
| 1635 ;; if there are no enclosing braces that haven't been | |
| 1636 ;; narrowed out by a class (i.e. don't use bod here!) | |
| 1637 ((save-excursion | |
| 1638 (save-restriction | |
| 1639 (widen) | |
| 1640 (goto-char containing-sexp) | |
| 1641 (c-narrow-out-enclosing-class state containing-sexp) | |
| 1642 (not (c-most-enclosing-brace state)))) | |
| 1643 (goto-char containing-sexp) | |
| 1644 ;; if not at boi, then defun-opening braces are hung on | |
| 1645 ;; right side, so we need a different relpos | |
| 1646 (if (/= (point) (c-point 'boi)) | |
| 1647 (progn | |
| 1648 (c-backward-syntactic-ws) | |
| 1649 (c-safe (forward-sexp (if (= (preceding-char) ?\)) | |
| 1650 -1 -2))) | |
| 1651 ;; looking at a Java throws clause following a | |
| 1652 ;; method's parameter list | |
| 1653 (c-beginning-of-statement-1) | |
| 1654 )) | |
| 1655 (c-add-syntax 'defun-block-intro (c-point 'boi))) | |
| 1656 ;; CASE 15F: first statement in a block | |
| 1657 (t (goto-char containing-sexp) | |
| 1658 (if (/= (point) (c-point 'boi)) | |
| 1659 (c-beginning-of-statement-1 | |
| 1660 (if (= (point) lim) | |
| 1661 (c-safe-position (point) state) lim))) | |
| 1662 (c-add-syntax 'statement-block-intro (c-point 'boi)) | |
| 1663 (if (= char-after-ip ?{) | |
| 1664 (c-add-syntax 'block-open))) | |
| 1665 )) | |
| 1666 ) | |
| 1667 | |
| 1668 ;; now we need to look at any modifiers | |
| 1669 (goto-char indent-point) | |
| 1670 (skip-chars-forward " \t") | |
| 1671 ;; are we looking at a comment only line? | |
| 1672 (if (looking-at c-comment-start-regexp) | |
| 1673 (c-add-syntax 'comment-intro)) | |
| 1674 ;; we might want to give additional offset to friends (in C++). | |
| 1675 (if (and (eq major-mode 'c++-mode) | |
| 1676 (looking-at c-C++-friend-key)) | |
| 1677 (c-add-syntax 'friend)) | |
| 1678 ;; return the syntax | |
| 1679 syntax)))) | |
| 1680 | |
| 1681 | |
| 1682 ;; indent via syntactic language elements | |
| 1683 (defun c-indent-line (&optional syntax) | |
| 1684 ;; indent the current line as C/C++/ObjC code. Optional SYNTAX is the | |
| 1685 ;; syntactic information for the current line. Returns the amount of | |
| 1686 ;; indentation change | |
| 1687 (let* ((c-syntactic-context (or syntax (c-guess-basic-syntax))) | |
| 1688 (pos (- (point-max) (point))) | |
| 1689 (indent (apply '+ (mapcar 'c-get-offset c-syntactic-context))) | |
| 1690 (shift-amt (- (current-indentation) indent))) | |
| 1691 (and c-echo-syntactic-information-p | |
| 1692 (message "syntax: %s, indent= %d" c-syntactic-context indent)) | |
| 1693 (if (zerop shift-amt) | |
| 1694 nil | |
| 1695 (delete-region (c-point 'bol) (c-point 'boi)) | |
| 1696 (beginning-of-line) | |
| 1697 (indent-to indent)) | |
| 1698 (if (< (point) (c-point 'boi)) | |
| 1699 (back-to-indentation) | |
| 1700 ;; If initial point was within line's indentation, position after | |
| 1701 ;; the indentation. Else stay at same point in text. | |
| 1702 (if (> (- (point-max) pos) (point)) | |
| 1703 (goto-char (- (point-max) pos))) | |
| 1704 ) | |
| 1705 (run-hooks 'c-special-indent-hook) | |
| 1706 shift-amt)) | |
| 1707 | |
| 1708 (defun c-show-syntactic-information (arg) | |
| 1709 "Show syntactic information for current line. | |
| 1710 With universal argument, inserts the analysis as a comment on that line." | |
| 1711 (interactive "P") | |
| 1712 (let ((syntax (c-guess-basic-syntax))) | |
| 1713 (if (not (consp arg)) | |
| 1714 (message "syntactic analysis: %s" syntax) | |
| 1715 (indent-for-comment) | |
| 1716 (insert (format "%s" syntax)) | |
| 1717 )) | |
| 1718 (c-keep-region-active)) | |
| 1719 | |
| 1720 | |
| 1721 (provide 'cc-engine) | |
| 1722 ;;; cc-engine.el ends here |