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1.1 ! root 1: ;; Lisp mode, and its idiosyncratic commands. ! 2: ;; Copyright (C) 1987 Free Software Foundation, Inc. ! 3: ;; Written by Richard Mlynarik July 1987 ! 4: ! 5: ;; This file is part of GNU Emacs. ! 6: ! 7: ;; GNU Emacs is free software; you can redistribute it and/or modify ! 8: ;; it under the terms of the GNU General Public License as published by ! 9: ;; the Free Software Foundation; either version 1, or (at your option) ! 10: ;; any later version. ! 11: ! 12: ;; GNU Emacs is distributed in the hope that it will be useful, ! 13: ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ! 14: ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ! 15: ;; GNU General Public License for more details. ! 16: ! 17: ;; You should have received a copy of the GNU General Public License ! 18: ;; along with GNU Emacs; see the file COPYING. If not, write to ! 19: ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. ! 20: ! 21: ;;>> TODO ! 22: ;; :foo ! 23: ;; bar ! 24: ;; :baz ! 25: ;; zap ! 26: ;; &key (like &body)?? ! 27: ! 28: ;; &rest 1 in lambda-lists doesn't work ! 29: ;; -- really want (foo bar ! 30: ;; baz) ! 31: ;; not (foo bar ! 32: ;; baz) ! 33: ;; Need something better than &rest for such cases ! 34: ! 35: ! 36: ;;; Hairy lisp indentation. ! 37: ! 38: (defvar lisp-indent-maximum-backtracking 3 ! 39: "*Maximum depth to backtrack out from a sublist for structured indentation. ! 40: If this variable is 0, no backtracking will occur and forms such as flet ! 41: may not be correctly indented.") ! 42: ! 43: (defvar lisp-tag-indentation 1 ! 44: "*Indentation of tags relative to containing list. ! 45: This variable is used by the function lisp-indent-tagbody.") ! 46: ! 47: (defvar lisp-tag-body-indentation 3 ! 48: "*Indentation of non-tagged lines relative to containing list. ! 49: This variable is used by the function lisp-indent-tagbody to indent normal ! 50: lines (lines without tags). ! 51: The indentation is relative to the indentation of the parenthesis enclosing ! 52: he special form. If the value is t, the body of tags will be indented ! 53: as a block at the same indentation as the first s-expression following ! 54: the tag. In this case, any forms before the first tag are indented ! 55: by lisp-body-indent.") ! 56: ! 57: ! 58: (defun common-lisp-indent-hook (indent-point state) ! 59: (let ((normal-indent (current-column))) ! 60: ;; Walk up list levels until we see something ! 61: ;; which does special things with subforms. ! 62: (let ((depth 0) ! 63: ;; Path describes the position of point in terms of ! 64: ;; list-structure with respect to contining lists. ! 65: ;; `foo' has a path of (0 4 1) in `((a b c (d foo) f) g)' ! 66: (path ()) ! 67: ;; set non-nil when somebody works out the indentation to use ! 68: calculated ! 69: (last-point indent-point) ! 70: ;; the position of the open-paren of the innermost containing list ! 71: (containing-form-start (elt state 1)) ! 72: ;; the column of the above ! 73: sexp-column) ! 74: ;; Move to start of innermost containing list ! 75: (goto-char containing-form-start) ! 76: (setq sexp-column (current-column)) ! 77: ;; Look over successively less-deep containing forms ! 78: (while (and (not calculated) ! 79: (< depth lisp-indent-maximum-backtracking)) ! 80: (let ((containing-sexp (point))) ! 81: (forward-char 1) ! 82: (parse-partial-sexp (point) indent-point 1 t) ! 83: ;; Move to the car of the relevant containing form ! 84: (let (tem function method) ! 85: (if (not (looking-at "\\sw\\|\\s_")) ! 86: ;; This form doesn't seem to start with a symbol ! 87: (setq function nil method nil) ! 88: (setq tem (point)) ! 89: (forward-sexp 1) ! 90: (setq function (downcase (buffer-substring tem (point)))) ! 91: (goto-char tem) ! 92: (setq tem (intern-soft function) ! 93: method (get tem 'common-lisp-indent-hook)) ! 94: (cond ((and (null method) ! 95: (string-match ":[^:]+" function)) ! 96: ;; The pleblisp package feature ! 97: (setq function (substring function ! 98: (1+ (match-beginning 0))) ! 99: method (get (intern-soft function) ! 100: 'common-lisp-indent-hook))) ! 101: ((and (null method)) ! 102: ;; backwards compatibility ! 103: (setq method (get tem 'lisp-indent-hook))))) ! 104: (let ((n 0)) ! 105: ;; How far into the containing form is the current form? ! 106: (if (< (point) indent-point) ! 107: (while (condition-case () ! 108: (progn ! 109: (forward-sexp 1) ! 110: (if (>= (point) indent-point) ! 111: nil ! 112: (parse-partial-sexp (point) ! 113: indent-point 1 t) ! 114: (setq n (1+ n)) ! 115: t)) ! 116: (error nil)))) ! 117: (setq path (cons n path))) ! 118: ! 119: ;; backwards compatibility. ! 120: (cond ((null function)) ! 121: ((null method) ! 122: (if (null (cdr path)) ! 123: ;; (package prefix was stripped off above) ! 124: (setq method (cond ((string-match "\\`def" ! 125: function) ! 126: '(4 (&whole 4 &rest 1) &body)) ! 127: ((string-match "\\`\\(with\\|do\\)-" ! 128: function) ! 129: '(4 &body)))))) ! 130: ;; backwards compatibility. Bletch. ! 131: ((eq method 'defun) ! 132: (setq method '(4 (&whole 4 &rest 1) &body)))) ! 133: ! 134: (cond ((and (memq (char-after (1- containing-sexp)) '(?\' ?\`)) ! 135: (not (eql (char-after (- containing-sexp 2)) ?\#))) ! 136: ;; No indentation for "'(...)" elements ! 137: (setq calculated (1+ sexp-column))) ! 138: ((eql (char-after (1- containing-sexp)) ?\#) ! 139: ;; "#(...)" ! 140: (setq calculated (1+ sexp-column))) ! 141: ((null method)) ! 142: ((integerp method) ! 143: ;; convenient top-level hack. ! 144: ;; (also compatible with lisp-indent-hook) ! 145: ;; The number specifies how many `distinguished' ! 146: ;; forms there are before the body starts ! 147: ;; Equivalent to (4 4 ... &body) ! 148: (setq calculated (cond ((cdr path) ! 149: normal-indent) ! 150: ((<= (car path) method) ! 151: ;; `distinguished' form ! 152: (list (+ sexp-column 4) ! 153: containing-form-start)) ! 154: ((= (car path) (1+ method)) ! 155: ;; first body form. ! 156: (+ sexp-column lisp-body-indent)) ! 157: (t ! 158: ;; other body form ! 159: normal-indent)))) ! 160: ((symbolp method) ! 161: (setq calculated (funcall method ! 162: path state indent-point ! 163: sexp-column normal-indent))) ! 164: (t ! 165: (setq calculated (lisp-indent-259 ! 166: method path state indent-point ! 167: sexp-column normal-indent))))) ! 168: (goto-char containing-sexp) ! 169: (setq last-point containing-sexp) ! 170: (if (not calculated) ! 171: (condition-case () ! 172: (progn (backward-up-list 1) ! 173: (setq depth (1+ depth))) ! 174: (error (setq depth lisp-indent-maximum-backtracking)))))) ! 175: calculated))) ! 176: ! 177: ! 178: (defun lisp-indent-report-bad-format (m) ! 179: (error "%s has a badly-formed %s property: %s" ! 180: ;; Love them free variable references!! ! 181: function 'common-lisp-indent-hook m)) ! 182: ! 183: ;; Blame the crufty control structure on dynamic scoping ! 184: ;; -- not on me! ! 185: (defun lisp-indent-259 (method path state indent-point ! 186: sexp-column normal-indent) ! 187: (catch 'exit ! 188: (let ((p path) ! 189: (containing-form-start (elt state 1)) ! 190: n tem tail) ! 191: ;; Isn't tail-recursion wonderful? ! 192: (while p ! 193: ;; This while loop is for destructuring. ! 194: ;; p is set to (cdr p) each iteration. ! 195: (if (not (consp method)) (lisp-indent-report-bad-format method)) ! 196: (setq n (1- (car p)) ! 197: p (cdr p) ! 198: tail nil) ! 199: (while n ! 200: ;; This while loop is for advancing along a method ! 201: ;; until the relevant (possibly &rest/&body) pattern ! 202: ;; is reached. ! 203: ;; n is set to (1- n) and method to (cdr method) ! 204: ;; each iteration. ! 205: ; (message "trying %s for %s %s" method p function) (sit-for 1) ! 206: (setq tem (car method)) ! 207: ! 208: (or (eq tem 'nil) ;default indentation ! 209: ; (eq tem '&lambda) ;abbrev for (&whole 4 (&rest 1)) ! 210: (and (eq tem '&body) (null (cdr method))) ! 211: (and (eq tem '&rest) ! 212: (consp (cdr method)) (null (cdr (cdr method)))) ! 213: (integerp tem) ;explicit indentation specified ! 214: (and (consp tem) ;destructuring ! 215: (eq (car tem) '&whole) ! 216: (or (symbolp (car (cdr tem))) ! 217: (integerp (car (cdr tem))))) ! 218: (and (symbolp tem) ;a function to call to do the work. ! 219: (null (cdr method))) ! 220: (lisp-indent-report-bad-format method)) ! 221: ! 222: (cond ((and tail (not (consp tem))) ! 223: ;; indent tail of &rest in same way as first elt of rest ! 224: (throw 'exit normal-indent)) ! 225: ((eq tem '&body) ! 226: ;; &body means (&rest <lisp-body-indent>) ! 227: (throw 'exit ! 228: (if (and (= n 0) ;first body form ! 229: (null p)) ;not in subforms ! 230: (+ sexp-column ! 231: lisp-body-indent) ! 232: normal-indent))) ! 233: ((eq tem '&rest) ! 234: ;; this pattern holds for all remaining forms ! 235: (setq tail (> n 0) ! 236: n 0 ! 237: method (cdr method))) ! 238: ((> n 0) ! 239: ;; try next element of pattern ! 240: (setq n (1- n) ! 241: method (cdr method)) ! 242: (if (< n 0) ! 243: ;; Too few elements in pattern. ! 244: (throw 'exit normal-indent))) ! 245: ((eq tem 'nil) ! 246: (throw 'exit (list normal-indent containing-form-start))) ! 247: ; ((eq tem '&lambda) ! 248: ; ;; abbrev for (&whole 4 &rest 1) ! 249: ; (throw 'exit ! 250: ; (cond ((null p) ! 251: ; (list (+ sexp-column 4) containing-form-start)) ! 252: ; ((null (cdr p)) ! 253: ; (+ sexp-column 1)) ! 254: ; (t normal-indent)))) ! 255: ((integerp tem) ! 256: (throw 'exit ! 257: (if (null p) ;not in subforms ! 258: (list (+ sexp-column tem) containing-form-start) ! 259: normal-indent))) ! 260: ((symbolp tem) ;a function to call ! 261: (throw 'exit ! 262: (funcall tem path state indent-point ! 263: sexp-column normal-indent))) ! 264: (t ! 265: ;; must be a destructing frob ! 266: (if (not (null p)) ! 267: ;; descend ! 268: (setq method (cdr (cdr tem)) ! 269: n nil) ! 270: (setq tem (car (cdr tem))) ! 271: (throw 'exit ! 272: (cond (tail ! 273: normal-indent) ! 274: ((eq tem 'nil) ! 275: (list normal-indent ! 276: containing-form-start)) ! 277: ((integerp tem) ! 278: (list (+ sexp-column tem) ! 279: containing-form-start)) ! 280: (t ! 281: (funcall tem path state indent-point ! 282: sexp-column normal-indent)))))))))))) ! 283: ! 284: (defun lisp-indent-tagbody (path state indent-point sexp-column normal-indent) ! 285: (if (not (null (cdr path))) ! 286: normal-indent ! 287: (save-excursion ! 288: (goto-char indent-point) ! 289: (beginning-of-line) ! 290: (skip-chars-forward " \t") ! 291: (list (cond ((looking-at "\\sw\\|\\s_") ! 292: ;; a tagbody tag ! 293: (+ sexp-column lisp-tag-indentation)) ! 294: ((integerp lisp-tag-body-indentation) ! 295: (+ sexp-column lisp-tag-body-indentation)) ! 296: ((eq lisp-tag-body-indentation 't) ! 297: (condition-case () ! 298: (progn (backward-sexp 1) (current-column)) ! 299: (error (1+ sexp-column)))) ! 300: (t (+ sexp-column lisp-body-indent))) ! 301: ; (cond ((integerp lisp-tag-body-indentation) ! 302: ; (+ sexp-column lisp-tag-body-indentation)) ! 303: ; ((eq lisp-tag-body-indentation 't) ! 304: ; normal-indent) ! 305: ; (t ! 306: ; (+ sexp-column lisp-body-indent))) ! 307: (elt state 1) ! 308: )))) ! 309: ! 310: (defun lisp-indent-do (path state indent-point sexp-column normal-indent) ! 311: (if (>= (car path) 3) ! 312: (let ((lisp-tag-body-indentation lisp-body-indent)) ! 313: (funcall (function lisp-indent-tagbody) ! 314: path state indent-point sexp-column normal-indent)) ! 315: (funcall (function lisp-indent-259) ! 316: '((&whole nil &rest ! 317: ;; the following causes wierd indentation ! 318: ;;(&whole 1 1 2 nil) ! 319: ) ! 320: (&whole nil &rest 1)) ! 321: path state indent-point sexp-column normal-indent))) ! 322: ! 323: (defun lisp-indent-function-lambda-hack (path state indent-point ! 324: sexp-column normal-indent) ! 325: ;; indent (function (lambda () <newline> <body-forms>)) kludgily. ! 326: (if (or (cdr path) ; wtf? ! 327: (> (car path) 3)) ! 328: ;; line up under previous body form ! 329: normal-indent ! 330: ;; line up under function rather than under lambda in order to ! 331: ;; conserve horizontal space. (Which is what #' is for.) ! 332: (condition-case () ! 333: (save-excursion ! 334: (backward-up-list 2) ! 335: (forward-char 1) ! 336: (if (looking-at "\\(lisp:+\\)?function\\(\\Sw\\|\\S_\\)") ! 337: (+ lisp-body-indent -1 (current-column)) ! 338: (+ sexp-column lisp-body-indent))) ! 339: (error (+ sexp-column lisp-body-indent))))) ! 340: ! 341: ! 342: (let ((l '((block 1) ! 343: (catch 1) ! 344: (case (4 &rest (&whole 2 &rest 1))) ! 345: (ccase . case) (ecase . case) ! 346: (typecase . case) (etypecase . case) (ctypecase . case) ! 347: (catch 1) ! 348: (cond (&rest (&whole 2 &rest 1))) ! 349: (block 1) ! 350: (defvar (4 2 2)) ! 351: (defconstant . defvar) (defparameter . defvar) ! 352: (define-modify-macro ! 353: (4 &body)) ! 354: (define-setf-method ! 355: (4 (&whole 4 &rest 1) &body)) ! 356: (defsetf (4 (&whole 4 &rest 1) 4 &body)) ! 357: (defun (4 (&whole 4 &rest 1) &body)) ! 358: (defmacro . defun) (deftype . defun) ! 359: (defstruct ((&whole 4 &rest (&whole 2 &rest 1)) ! 360: &rest (&whole 2 &rest 1))) ! 361: (destructuring-bind ! 362: ((&whole 6 &rest 1) 4 &body)) ! 363: (do lisp-indent-do) ! 364: (do* . do) ! 365: (dolist ((&whole 4 2 1) &body)) ! 366: (dotimes . dolist) ! 367: (eval-when 1) ! 368: (flet ((&whole 4 &rest (&whole 1 (&whole 4 &rest 1) &body)) ! 369: &body)) ! 370: (labels . flet) ! 371: (macrolet . flet) ! 372: ;; `else-body' style ! 373: (if (nil nil &body)) ! 374: ;; single-else style (then and else equally indented) ! 375: (if (&rest nil)) ! 376: ;(lambda ((&whole 4 &rest 1) &body)) ! 377: (lambda ((&whole 4 &rest 1) ! 378: &rest lisp-indent-function-lambda-hack)) ! 379: (let ((&whole 4 &rest (&whole 1 1 2)) &body)) ! 380: (let* . let) ! 381: (locally 1) ! 382: ;(loop ...) ! 383: (multiple-value-bind ! 384: ((&whole 6 &rest 1) 4 &body)) ! 385: (multiple-value-call ! 386: (4 &body)) ! 387: (multiple-value-list 1) ! 388: (multiple-value-prog1 1) ! 389: (multiple-value-setq ! 390: (4 2)) ! 391: ;; Combines the worst features of BLOCK, LET and TAGBODY ! 392: (prog ((&whole 4 &rest 1) &rest lisp-indent-tagbody)) ! 393: (prog* . prog) ! 394: (prog1 1) ! 395: (prog2 2) ! 396: (progn 0) ! 397: (progv (4 4 &body)) ! 398: (return 0) ! 399: (return-from (nil &body)) ! 400: (tagbody lisp-indent-tagbody) ! 401: (throw 1) ! 402: (unless 1) ! 403: (unwind-protect ! 404: (5 &body)) ! 405: (when 1)))) ! 406: (while l ! 407: (put (car (car l)) 'common-lisp-indent-hook ! 408: (if (symbolp (cdr (car l))) ! 409: (get (cdr (car l)) 'common-lisp-indent-hook) ! 410: (car (cdr (car l))))) ! 411: (setq l (cdr l)))) ! 412: ! 413: ! 414: ;(defun foo (x) ! 415: ; (tagbody ! 416: ; foo ! 417: ; (bar) ! 418: ; baz ! 419: ; (when (losing) ! 420: ; (with-big-loser ! 421: ; (yow) ! 422: ; ((lambda () ! 423: ; foo) ! 424: ; big))) ! 425: ; (flet ((foo (bar baz zap) ! 426: ; (zip)) ! 427: ; (zot () ! 428: ; quux)) ! 429: ; (do () ! 430: ; ((lose) ! 431: ; (foo 1)) ! 432: ; (quux) ! 433: ; foo ! 434: ; (lose)) ! 435: ; (cond ((x) ! 436: ; (win 1 2 ! 437: ; (foo))) ! 438: ; (t ! 439: ; (lose ! 440: ; 3)))))) ! 441: ! 442: ! 443: ;(put 'while 'common-lisp-indent-hook 1) ! 444: ;(put 'defwrapper'common-lisp-indent-hook ...) ! 445: ;(put 'def 'common-lisp-indent-hook ...) ! 446: ;(put 'defflavor 'common-lisp-indent-hook ...) ! 447: ;(put 'defsubst 'common-lisp-indent-hook ...) ! 448: ! 449: ;;(put 'define-restart-name 'common-lisp-indent-hook '1) ! 450: ;(put 'with-restart 'common-lisp-indent-hook '((1 4 ((* 1))) (2 &body))) ! 451: ;(put 'restart-case 'common-lisp-indent-hook '((1 4) (* 2 ((0 1) (* 1))))) ! 452: ;(put 'define-condition 'common-lisp-indent-hook '((1 6) (2 6 ((* 1))) (3 4 ((* 1))) (4 &body))) ! 453: ;(put 'with-condition-handler 'common-lisp-indent-hook '((1 4 ((* 1))) (2 &body))) ! 454: ;(put 'condition-case 'common-lisp-indent-hook '((1 4) (* 2 ((0 1) (1 3) (2 &body))))) ! 455: ! 456: ! 457: ;;;; Turn it on. ! 458: ;(setq lisp-indent-hook 'common-lisp-indent-hook) ! 459: ! 460: ;; To disable this stuff, (setq lisp-indent-hook 'lisp-indent-hook) ! 461:
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