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c88ab9ce ER |
1 | ;;; scheme.el --- Scheme mode, and its idiosyncratic commands. |
2 | ||
e5167999 ER |
3 | ;; Author: Bill Rozas <jinz@prep.ai.mit.edu> |
4 | ;; Last-Modified: 16 Mar 1992 | |
5 | ||
6 | ;;; $Header: scheme.el,v 1.7 88/07/15 20:20:00 GMT cph Exp $ | |
7 | ||
ac5b21ac | 8 | ;; Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc. |
ac5b21ac RS |
9 | |
10 | ;; This file is part of GNU Emacs. | |
11 | ||
12 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
13 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 14 | ;; the Free Software Foundation; either version 2, or (at your option) |
ac5b21ac RS |
15 | ;; any later version. |
16 | ||
17 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
18 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | ;; GNU General Public License for more details. | |
21 | ||
22 | ;; You should have received a copy of the GNU General Public License | |
23 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
24 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
25 | ||
e5167999 | 26 | ;;; Commentary: |
ac5b21ac | 27 | |
e5167999 | 28 | ;; Adapted from Lisp mode by Bill Rozas, jinx@prep. |
ac5b21ac RS |
29 | ;; Initially a query replace of Lisp mode, except for the indentation |
30 | ;; of special forms. Probably the code should be merged at some point | |
31 | ;; so that there is sharing between both libraries. | |
32 | ||
e5167999 | 33 | ;;; Code: |
ac5b21ac RS |
34 | \f |
35 | (defvar scheme-mode-syntax-table nil "") | |
36 | (if (not scheme-mode-syntax-table) | |
37 | (let ((i 0)) | |
38 | (setq scheme-mode-syntax-table (make-syntax-table)) | |
39 | (set-syntax-table scheme-mode-syntax-table) | |
40 | ||
41 | ;; Default is atom-constituent. | |
42 | (while (< i 256) | |
43 | (modify-syntax-entry i "_ ") | |
44 | (setq i (1+ i))) | |
45 | ||
46 | ;; Word components. | |
47 | (setq i ?0) | |
48 | (while (<= i ?9) | |
49 | (modify-syntax-entry i "w ") | |
50 | (setq i (1+ i))) | |
51 | (setq i ?A) | |
52 | (while (<= i ?Z) | |
53 | (modify-syntax-entry i "w ") | |
54 | (setq i (1+ i))) | |
55 | (setq i ?a) | |
56 | (while (<= i ?z) | |
57 | (modify-syntax-entry i "w ") | |
58 | (setq i (1+ i))) | |
59 | ||
60 | ;; Whitespace | |
61 | (modify-syntax-entry ?\t " ") | |
62 | (modify-syntax-entry ?\n "> ") | |
63 | (modify-syntax-entry ?\f " ") | |
64 | (modify-syntax-entry ?\r " ") | |
65 | (modify-syntax-entry ? " ") | |
66 | ||
67 | ;; These characters are delimiters but otherwise undefined. | |
68 | ;; Brackets and braces balance for editing convenience. | |
69 | (modify-syntax-entry ?[ "(] ") | |
70 | (modify-syntax-entry ?] ")[ ") | |
71 | (modify-syntax-entry ?{ "(} ") | |
72 | (modify-syntax-entry ?} "){ ") | |
73 | (modify-syntax-entry ?\| " 23") | |
74 | ||
75 | ;; Other atom delimiters | |
76 | (modify-syntax-entry ?\( "() ") | |
77 | (modify-syntax-entry ?\) ")( ") | |
78 | (modify-syntax-entry ?\; "< ") | |
79 | (modify-syntax-entry ?\" "\" ") | |
80 | (modify-syntax-entry ?' " p") | |
81 | (modify-syntax-entry ?` " p") | |
82 | ||
83 | ;; Special characters | |
84 | (modify-syntax-entry ?, "_ p") | |
85 | (modify-syntax-entry ?@ "_ p") | |
86 | (modify-syntax-entry ?# "_ p14") | |
87 | (modify-syntax-entry ?\\ "\\ "))) | |
88 | \f | |
89 | (defvar scheme-mode-abbrev-table nil "") | |
90 | (define-abbrev-table 'scheme-mode-abbrev-table ()) | |
91 | ||
92 | (defun scheme-mode-variables () | |
93 | (set-syntax-table scheme-mode-syntax-table) | |
94 | (setq local-abbrev-table scheme-mode-abbrev-table) | |
95 | (make-local-variable 'paragraph-start) | |
96 | (setq paragraph-start (concat "^$\\|" page-delimiter)) | |
97 | (make-local-variable 'paragraph-separate) | |
98 | (setq paragraph-separate paragraph-start) | |
99 | (make-local-variable 'paragraph-ignore-fill-prefix) | |
100 | (setq paragraph-ignore-fill-prefix t) | |
101 | (make-local-variable 'indent-line-function) | |
102 | (setq indent-line-function 'scheme-indent-line) | |
103 | (make-local-variable 'comment-start) | |
104 | (setq comment-start ";") | |
105 | (make-local-variable 'comment-start-skip) | |
106 | (setq comment-start-skip ";+[ \t]*") | |
107 | (make-local-variable 'comment-column) | |
108 | (setq comment-column 40) | |
109 | (make-local-variable 'comment-indent-hook) | |
110 | (setq comment-indent-hook 'scheme-comment-indent) | |
111 | (setq mode-line-process '("" scheme-mode-line-process))) | |
112 | ||
113 | (defvar scheme-mode-line-process "") | |
114 | ||
115 | (defun scheme-mode-commands (map) | |
116 | (define-key map "\t" 'scheme-indent-line) | |
117 | (define-key map "\177" 'backward-delete-char-untabify) | |
118 | (define-key map "\e\C-q" 'scheme-indent-sexp)) | |
119 | ||
120 | (defvar scheme-mode-map nil) | |
121 | (if (not scheme-mode-map) | |
122 | (progn | |
123 | (setq scheme-mode-map (make-sparse-keymap)) | |
124 | (scheme-mode-commands scheme-mode-map))) | |
125 | \f | |
e2ab0aa6 | 126 | ;;;###autoload |
ac5b21ac RS |
127 | (defun scheme-mode () |
128 | "Major mode for editing Scheme code. | |
129 | Editing commands are similar to those of lisp-mode. | |
130 | ||
131 | In addition, if an inferior Scheme process is running, some additional | |
132 | commands will be defined, for evaluating expressions and controlling | |
133 | the interpreter, and the state of the process will be displayed in the | |
134 | modeline of all Scheme buffers. The names of commands that interact | |
135 | with the Scheme process start with \"xscheme-\". For more information | |
136 | see the documentation for xscheme-interaction-mode. | |
137 | ||
138 | Commands: | |
139 | Delete converts tabs to spaces as it moves back. | |
140 | Blank lines separate paragraphs. Semicolons start comments. | |
141 | \\{scheme-mode-map} | |
142 | Entry to this mode calls the value of scheme-mode-hook | |
143 | if that value is non-nil." | |
144 | (interactive) | |
145 | (kill-all-local-variables) | |
146 | (scheme-mode-initialize) | |
147 | (scheme-mode-variables) | |
148 | (run-hooks 'scheme-mode-hook)) | |
149 | ||
150 | (defun scheme-mode-initialize () | |
151 | (use-local-map scheme-mode-map) | |
152 | (setq major-mode 'scheme-mode) | |
153 | (setq mode-name "Scheme")) | |
154 | ||
155 | (defvar scheme-mit-dialect t | |
156 | "If non-nil, scheme mode is specialized for MIT Scheme. | |
157 | Set this to nil if you normally use another dialect.") | |
158 | \f | |
159 | (defun scheme-comment-indent (&optional pos) | |
160 | (save-excursion | |
161 | (if pos (goto-char pos)) | |
162 | (cond ((looking-at ";;;") (current-column)) | |
163 | ((looking-at ";;") | |
164 | (let ((tem (calculate-scheme-indent))) | |
165 | (if (listp tem) (car tem) tem))) | |
166 | (t | |
167 | (skip-chars-backward " \t") | |
168 | (max (if (bolp) 0 (1+ (current-column))) | |
169 | comment-column))))) | |
170 | ||
171 | (defvar scheme-indent-offset nil "") | |
172 | (defvar scheme-indent-function 'scheme-indent-function "") | |
173 | ||
174 | (defun scheme-indent-line (&optional whole-exp) | |
175 | "Indent current line as Scheme code. | |
176 | With argument, indent any additional lines of the same expression | |
177 | rigidly along with this one." | |
178 | (interactive "P") | |
179 | (let ((indent (calculate-scheme-indent)) shift-amt beg end | |
180 | (pos (- (point-max) (point)))) | |
181 | (beginning-of-line) | |
182 | (setq beg (point)) | |
183 | (skip-chars-forward " \t") | |
184 | (if (looking-at "[ \t]*;;;") | |
185 | ;; Don't alter indentation of a ;;; comment line. | |
186 | nil | |
187 | (if (listp indent) (setq indent (car indent))) | |
188 | (setq shift-amt (- indent (current-column))) | |
189 | (if (zerop shift-amt) | |
190 | nil | |
191 | (delete-region beg (point)) | |
192 | (indent-to indent)) | |
193 | ;; If initial point was within line's indentation, | |
194 | ;; position after the indentation. Else stay at same point in text. | |
195 | (if (> (- (point-max) pos) (point)) | |
196 | (goto-char (- (point-max) pos))) | |
197 | ;; If desired, shift remaining lines of expression the same amount. | |
198 | (and whole-exp (not (zerop shift-amt)) | |
199 | (save-excursion | |
200 | (goto-char beg) | |
201 | (forward-sexp 1) | |
202 | (setq end (point)) | |
203 | (goto-char beg) | |
204 | (forward-line 1) | |
205 | (setq beg (point)) | |
206 | (> end beg)) | |
207 | (indent-code-rigidly beg end shift-amt))))) | |
208 | \f | |
209 | (defun calculate-scheme-indent (&optional parse-start) | |
210 | "Return appropriate indentation for current line as scheme code. | |
211 | In usual case returns an integer: the column to indent to. | |
212 | Can instead return a list, whose car is the column to indent to. | |
213 | This means that following lines at the same level of indentation | |
214 | should not necessarily be indented the same way. | |
215 | The second element of the list is the buffer position | |
216 | of the start of the containing expression." | |
217 | (save-excursion | |
218 | (beginning-of-line) | |
219 | (let ((indent-point (point)) state paren-depth desired-indent (retry t) | |
220 | last-sexp containing-sexp first-sexp-list-p) | |
221 | (if parse-start | |
222 | (goto-char parse-start) | |
223 | (beginning-of-defun)) | |
224 | ;; Find outermost containing sexp | |
225 | (while (< (point) indent-point) | |
226 | (setq state (parse-partial-sexp (point) indent-point 0))) | |
227 | ;; Find innermost containing sexp | |
228 | (while (and retry (setq paren-depth (car state)) (> paren-depth 0)) | |
229 | (setq retry nil) | |
230 | (setq last-sexp (nth 2 state)) | |
231 | (setq containing-sexp (car (cdr state))) | |
232 | ;; Position following last unclosed open. | |
233 | (goto-char (1+ containing-sexp)) | |
234 | ;; Is there a complete sexp since then? | |
235 | (if (and last-sexp (> last-sexp (point))) | |
236 | ;; Yes, but is there a containing sexp after that? | |
237 | (let ((peek (parse-partial-sexp last-sexp indent-point 0))) | |
238 | (if (setq retry (car (cdr peek))) (setq state peek)))) | |
239 | (if (not retry) | |
240 | ;; Innermost containing sexp found | |
241 | (progn | |
242 | (goto-char (1+ containing-sexp)) | |
243 | (if (not last-sexp) | |
244 | ;; indent-point immediately follows open paren. | |
245 | ;; Don't call hook. | |
246 | (setq desired-indent (current-column)) | |
247 | ;; Move to first sexp after containing open paren | |
248 | (parse-partial-sexp (point) last-sexp 0 t) | |
249 | (setq first-sexp-list-p (looking-at "\\s(")) | |
250 | (cond | |
251 | ((> (save-excursion (forward-line 1) (point)) | |
252 | last-sexp) | |
253 | ;; Last sexp is on same line as containing sexp. | |
254 | ;; It's almost certainly a function call. | |
255 | (parse-partial-sexp (point) last-sexp 0 t) | |
256 | (if (/= (point) last-sexp) | |
257 | ;; Indent beneath first argument or, if only one sexp | |
258 | ;; on line, indent beneath that. | |
259 | (progn (forward-sexp 1) | |
260 | (parse-partial-sexp (point) last-sexp 0 t))) | |
261 | (backward-prefix-chars)) | |
262 | (t | |
263 | ;; Indent beneath first sexp on same line as last-sexp. | |
264 | ;; Again, it's almost certainly a function call. | |
265 | (goto-char last-sexp) | |
266 | (beginning-of-line) | |
267 | (parse-partial-sexp (point) last-sexp 0 t) | |
268 | (backward-prefix-chars))))))) | |
269 | ;; If looking at a list, don't call hook. | |
270 | (if first-sexp-list-p | |
271 | (setq desired-indent (current-column))) | |
272 | ;; Point is at the point to indent under unless we are inside a string. | |
273 | ;; Call indentation hook except when overriden by scheme-indent-offset | |
274 | ;; or if the desired indentation has already been computed. | |
275 | (cond ((car (nthcdr 3 state)) | |
276 | ;; Inside a string, don't change indentation. | |
277 | (goto-char indent-point) | |
278 | (skip-chars-forward " \t") | |
279 | (setq desired-indent (current-column))) | |
280 | ((and (integerp scheme-indent-offset) containing-sexp) | |
281 | ;; Indent by constant offset | |
282 | (goto-char containing-sexp) | |
283 | (setq desired-indent (+ scheme-indent-offset (current-column)))) | |
284 | ((not (or desired-indent | |
285 | (and (boundp 'scheme-indent-function) | |
286 | scheme-indent-function | |
287 | (not retry) | |
288 | (setq desired-indent | |
289 | (funcall scheme-indent-function | |
290 | indent-point state))))) | |
291 | ;; Use default indentation if not computed yet | |
292 | (setq desired-indent (current-column)))) | |
293 | desired-indent))) | |
294 | \f | |
295 | (defun scheme-indent-function (indent-point state) | |
296 | (let ((normal-indent (current-column))) | |
297 | (save-excursion | |
298 | (goto-char (1+ (car (cdr state)))) | |
299 | (re-search-forward "\\sw\\|\\s_") | |
300 | (if (/= (point) (car (cdr state))) | |
301 | (let ((function (buffer-substring (progn (forward-char -1) (point)) | |
302 | (progn (forward-sexp 1) (point)))) | |
303 | method) | |
304 | ;; Who cares about this, really? | |
305 | ;(if (not (string-match "\\\\\\||" function))) | |
306 | (setq function (downcase function)) | |
307 | (setq method (get (intern-soft function) 'scheme-indent-function)) | |
308 | (cond ((integerp method) | |
309 | (scheme-indent-specform method state indent-point)) | |
310 | (method | |
311 | (funcall method state indent-point)) | |
312 | ((and (> (length function) 3) | |
313 | (string-equal (substring function 0 3) "def")) | |
314 | (scheme-indent-defform state indent-point)))))))) | |
315 | ||
316 | (defvar scheme-body-indent 2 "") | |
317 | \f | |
318 | (defun scheme-indent-specform (count state indent-point) | |
319 | (let ((containing-form-start (car (cdr state))) (i count) | |
320 | body-indent containing-form-column) | |
321 | ;; Move to the start of containing form, calculate indentation | |
322 | ;; to use for non-distinguished forms (> count), and move past the | |
323 | ;; function symbol. scheme-indent-function guarantees that there is at | |
324 | ;; least one word or symbol character following open paren of containing | |
325 | ;; form. | |
326 | (goto-char containing-form-start) | |
327 | (setq containing-form-column (current-column)) | |
328 | (setq body-indent (+ scheme-body-indent containing-form-column)) | |
329 | (forward-char 1) | |
330 | (forward-sexp 1) | |
331 | ;; Now find the start of the last form. | |
332 | (parse-partial-sexp (point) indent-point 1 t) | |
333 | (while (and (< (point) indent-point) | |
334 | (condition-case nil | |
335 | (progn | |
336 | (setq count (1- count)) | |
337 | (forward-sexp 1) | |
338 | (parse-partial-sexp (point) indent-point 1 t)) | |
339 | (error nil)))) | |
340 | ;; Point is sitting on first character of last (or count) sexp. | |
341 | (cond ((> count 0) | |
342 | ;; A distinguished form. Use double scheme-body-indent. | |
343 | (list (+ containing-form-column (* 2 scheme-body-indent)) | |
344 | containing-form-start)) | |
345 | ;; A non-distinguished form. Use body-indent if there are no | |
346 | ;; distinguished forms and this is the first undistinguished | |
347 | ;; form, or if this is the first undistinguished form and | |
348 | ;; the preceding distinguished form has indentation at least | |
349 | ;; as great as body-indent. | |
350 | ((and (= count 0) | |
351 | (or (= i 0) | |
352 | (<= body-indent normal-indent))) | |
353 | body-indent) | |
354 | (t | |
355 | normal-indent)))) | |
356 | ||
357 | (defun scheme-indent-defform (state indent-point) | |
358 | (goto-char (car (cdr state))) | |
359 | (forward-line 1) | |
360 | (if (> (point) (car (cdr (cdr state)))) | |
361 | (progn | |
362 | (goto-char (car (cdr state))) | |
363 | (+ scheme-body-indent (current-column))))) | |
364 | \f | |
365 | ;;; Let is different in Scheme | |
366 | ||
367 | (defun would-be-symbol (string) | |
368 | (not (string-equal (substring string 0 1) "("))) | |
369 | ||
370 | (defun next-sexp-as-string () | |
371 | ;; Assumes that protected by a save-excursion | |
372 | (forward-sexp 1) | |
373 | (let ((the-end (point))) | |
374 | (backward-sexp 1) | |
375 | (buffer-substring (point) the-end))) | |
376 | ||
377 | ;; This is correct but too slow. | |
378 | ;; The one below works almost always. | |
379 | ;;(defun scheme-let-indent (state indent-point) | |
380 | ;; (if (would-be-symbol (next-sexp-as-string)) | |
381 | ;; (scheme-indent-specform 2 state indent-point) | |
382 | ;; (scheme-indent-specform 1 state indent-point))) | |
383 | ||
384 | (defun scheme-let-indent (state indent-point) | |
385 | (skip-chars-forward " \t") | |
386 | (if (looking-at "[a-zA-Z0-9+-*/?!@$%^&_:~]") | |
387 | (scheme-indent-specform 2 state indent-point) | |
388 | (scheme-indent-specform 1 state indent-point))) | |
389 | ||
390 | ;; (put 'begin 'scheme-indent-function 0), say, causes begin to be indented | |
391 | ;; like defun if the first form is placed on the next line, otherwise | |
392 | ;; it is indented like any other form (i.e. forms line up under first). | |
393 | ||
394 | (put 'begin 'scheme-indent-function 0) | |
395 | (put 'case 'scheme-indent-function 1) | |
396 | (put 'delay 'scheme-indent-function 0) | |
397 | (put 'do 'scheme-indent-function 2) | |
398 | (put 'lambda 'scheme-indent-function 1) | |
399 | (put 'let 'scheme-indent-function 'scheme-let-indent) | |
400 | (put 'let* 'scheme-indent-function 1) | |
401 | (put 'letrec 'scheme-indent-function 1) | |
402 | (put 'sequence 'scheme-indent-function 0) | |
403 | ||
404 | (put 'call-with-input-file 'scheme-indent-function 1) | |
405 | (put 'with-input-from-file 'scheme-indent-function 1) | |
406 | (put 'with-input-from-port 'scheme-indent-function 1) | |
407 | (put 'call-with-output-file 'scheme-indent-function 1) | |
408 | (put 'with-output-to-file 'scheme-indent-function 1) | |
409 | (put 'with-output-to-port 'scheme-indent-function 1) | |
410 | \f | |
411 | ;;;; MIT Scheme specific indentation. | |
412 | ||
413 | (if scheme-mit-dialect | |
414 | (progn | |
415 | (put 'fluid-let 'scheme-indent-function 1) | |
416 | (put 'in-package 'scheme-indent-function 1) | |
417 | (put 'let-syntax 'scheme-indent-function 1) | |
418 | (put 'local-declare 'scheme-indent-function 1) | |
419 | (put 'macro 'scheme-indent-function 1) | |
420 | (put 'make-environment 'scheme-indent-function 0) | |
421 | (put 'named-lambda 'scheme-indent-function 1) | |
422 | (put 'using-syntax 'scheme-indent-function 1) | |
423 | ||
424 | (put 'with-input-from-string 'scheme-indent-function 1) | |
425 | (put 'with-output-to-string 'scheme-indent-function 0) | |
426 | (put 'with-values 'scheme-indent-function 1) | |
427 | ||
428 | (put 'syntax-table-define 'scheme-indent-function 2) | |
429 | (put 'list-transform-positive 'scheme-indent-function 1) | |
430 | (put 'list-transform-negative 'scheme-indent-function 1) | |
431 | (put 'list-search-positive 'scheme-indent-function 1) | |
432 | (put 'list-search-negative 'scheme-indent-function 1) | |
433 | ||
434 | (put 'access-components 'scheme-indent-function 1) | |
435 | (put 'assignment-components 'scheme-indent-function 1) | |
436 | (put 'combination-components 'scheme-indent-function 1) | |
437 | (put 'comment-components 'scheme-indent-function 1) | |
438 | (put 'conditional-components 'scheme-indent-function 1) | |
439 | (put 'disjunction-components 'scheme-indent-function 1) | |
440 | (put 'declaration-components 'scheme-indent-function 1) | |
441 | (put 'definition-components 'scheme-indent-function 1) | |
442 | (put 'delay-components 'scheme-indent-function 1) | |
443 | (put 'in-package-components 'scheme-indent-function 1) | |
444 | (put 'lambda-components 'scheme-indent-function 1) | |
445 | (put 'lambda-components* 'scheme-indent-function 1) | |
446 | (put 'lambda-components** 'scheme-indent-function 1) | |
447 | (put 'open-block-components 'scheme-indent-function 1) | |
448 | (put 'pathname-components 'scheme-indent-function 1) | |
449 | (put 'procedure-components 'scheme-indent-function 1) | |
450 | (put 'sequence-components 'scheme-indent-function 1) | |
451 | (put 'unassigned\?-components 'scheme-indent-function 1) | |
452 | (put 'unbound\?-components 'scheme-indent-function 1) | |
453 | (put 'variable-components 'scheme-indent-function 1))) | |
454 | \f | |
455 | (defun scheme-indent-sexp () | |
456 | "Indent each line of the list starting just after point." | |
457 | (interactive) | |
458 | (let ((indent-stack (list nil)) (next-depth 0) bol | |
459 | outer-loop-done inner-loop-done state this-indent) | |
460 | (save-excursion (forward-sexp 1)) | |
461 | (save-excursion | |
462 | (setq outer-loop-done nil) | |
463 | (while (not outer-loop-done) | |
464 | (setq last-depth next-depth | |
465 | innerloop-done nil) | |
466 | (while (and (not innerloop-done) | |
467 | (not (setq outer-loop-done (eobp)))) | |
468 | (setq state (parse-partial-sexp (point) (progn (end-of-line) (point)) | |
469 | nil nil state)) | |
470 | (setq next-depth (car state)) | |
471 | (if (car (nthcdr 4 state)) | |
472 | (progn (indent-for-comment) | |
473 | (end-of-line) | |
474 | (setcar (nthcdr 4 state) nil))) | |
475 | (if (car (nthcdr 3 state)) | |
476 | (progn | |
477 | (forward-line 1) | |
478 | (setcar (nthcdr 5 state) nil)) | |
479 | (setq innerloop-done t))) | |
480 | (if (setq outer-loop-done (<= next-depth 0)) | |
481 | nil | |
482 | (while (> last-depth next-depth) | |
483 | (setq indent-stack (cdr indent-stack) | |
484 | last-depth (1- last-depth))) | |
485 | (while (< last-depth next-depth) | |
486 | (setq indent-stack (cons nil indent-stack) | |
487 | last-depth (1+ last-depth))) | |
488 | (forward-line 1) | |
489 | (setq bol (point)) | |
490 | (skip-chars-forward " \t") | |
491 | (if (or (eobp) (looking-at "[;\n]")) | |
492 | nil | |
493 | (if (and (car indent-stack) | |
494 | (>= (car indent-stack) 0)) | |
495 | (setq this-indent (car indent-stack)) | |
496 | (let ((val (calculate-scheme-indent | |
497 | (if (car indent-stack) (- (car indent-stack)))))) | |
498 | (if (integerp val) | |
499 | (setcar indent-stack | |
500 | (setq this-indent val)) | |
501 | (setcar indent-stack (- (car (cdr val)))) | |
502 | (setq this-indent (car val))))) | |
503 | (if (/= (current-column) this-indent) | |
504 | (progn (delete-region bol (point)) | |
505 | (indent-to this-indent))))))))) | |
49116ac0 JB |
506 | |
507 | (provide 'scheme) | |
c88ab9ce ER |
508 | |
509 | ;;; scheme.el ends here |