Commit | Line | Data |
---|---|---|
c88ab9ce ER |
1 | ;;; scheme.el --- Scheme mode, and its idiosyncratic commands. |
2 | ||
3a801d0c ER |
3 | ;; Copyright (C) 1986, 1987, 1988 Free Software Foundation, Inc. |
4 | ||
e5167999 | 5 | ;; Author: Bill Rozas <jinz@prep.ai.mit.edu> |
d7b4d18f | 6 | ;; Keywords: languages, lisp |
e5167999 | 7 | |
ac5b21ac RS |
8 | ;; This file is part of GNU Emacs. |
9 | ||
10 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
e5167999 | 12 | ;; the Free Software Foundation; either version 2, or (at your option) |
ac5b21ac RS |
13 | ;; any later version. |
14 | ||
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
21 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
22 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | ||
e5167999 | 24 | ;;; Commentary: |
ac5b21ac | 25 | |
e5167999 | 26 | ;; Adapted from Lisp mode by Bill Rozas, jinx@prep. |
ac5b21ac RS |
27 | ;; Initially a query replace of Lisp mode, except for the indentation |
28 | ;; of special forms. Probably the code should be merged at some point | |
29 | ;; so that there is sharing between both libraries. | |
30 | ||
e5167999 | 31 | ;;; Code: |
ac5b21ac RS |
32 | \f |
33 | (defvar scheme-mode-syntax-table nil "") | |
34 | (if (not scheme-mode-syntax-table) | |
35 | (let ((i 0)) | |
36 | (setq scheme-mode-syntax-table (make-syntax-table)) | |
37 | (set-syntax-table scheme-mode-syntax-table) | |
38 | ||
39 | ;; Default is atom-constituent. | |
40 | (while (< i 256) | |
41 | (modify-syntax-entry i "_ ") | |
42 | (setq i (1+ i))) | |
43 | ||
44 | ;; Word components. | |
45 | (setq i ?0) | |
46 | (while (<= i ?9) | |
47 | (modify-syntax-entry i "w ") | |
48 | (setq i (1+ i))) | |
49 | (setq i ?A) | |
50 | (while (<= i ?Z) | |
51 | (modify-syntax-entry i "w ") | |
52 | (setq i (1+ i))) | |
53 | (setq i ?a) | |
54 | (while (<= i ?z) | |
55 | (modify-syntax-entry i "w ") | |
56 | (setq i (1+ i))) | |
57 | ||
58 | ;; Whitespace | |
59 | (modify-syntax-entry ?\t " ") | |
60 | (modify-syntax-entry ?\n "> ") | |
61 | (modify-syntax-entry ?\f " ") | |
62 | (modify-syntax-entry ?\r " ") | |
63 | (modify-syntax-entry ? " ") | |
64 | ||
65 | ;; These characters are delimiters but otherwise undefined. | |
66 | ;; Brackets and braces balance for editing convenience. | |
67 | (modify-syntax-entry ?[ "(] ") | |
68 | (modify-syntax-entry ?] ")[ ") | |
69 | (modify-syntax-entry ?{ "(} ") | |
70 | (modify-syntax-entry ?} "){ ") | |
71 | (modify-syntax-entry ?\| " 23") | |
72 | ||
73 | ;; Other atom delimiters | |
74 | (modify-syntax-entry ?\( "() ") | |
75 | (modify-syntax-entry ?\) ")( ") | |
76 | (modify-syntax-entry ?\; "< ") | |
77 | (modify-syntax-entry ?\" "\" ") | |
78 | (modify-syntax-entry ?' " p") | |
79 | (modify-syntax-entry ?` " p") | |
80 | ||
81 | ;; Special characters | |
82 | (modify-syntax-entry ?, "_ p") | |
83 | (modify-syntax-entry ?@ "_ p") | |
84 | (modify-syntax-entry ?# "_ p14") | |
85 | (modify-syntax-entry ?\\ "\\ "))) | |
86 | \f | |
87 | (defvar scheme-mode-abbrev-table nil "") | |
88 | (define-abbrev-table 'scheme-mode-abbrev-table ()) | |
89 | ||
90 | (defun scheme-mode-variables () | |
91 | (set-syntax-table scheme-mode-syntax-table) | |
92 | (setq local-abbrev-table scheme-mode-abbrev-table) | |
93 | (make-local-variable 'paragraph-start) | |
53e84345 | 94 | (setq paragraph-start (concat "$\\|" page-delimiter)) |
ac5b21ac RS |
95 | (make-local-variable 'paragraph-separate) |
96 | (setq paragraph-separate paragraph-start) | |
97 | (make-local-variable 'paragraph-ignore-fill-prefix) | |
98 | (setq paragraph-ignore-fill-prefix t) | |
99 | (make-local-variable 'indent-line-function) | |
100 | (setq indent-line-function 'scheme-indent-line) | |
446e6a14 KH |
101 | (make-local-variable 'parse-sexp-ignore-comments) |
102 | (setq parse-sexp-ignore-comments t) | |
ac5b21ac RS |
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) | |
e41b2db1 ER |
109 | (make-local-variable 'comment-indent-function) |
110 | (setq comment-indent-function 'scheme-comment-indent) | |
2441d53d RS |
111 | (make-local-variable 'parse-sexp-ignore-comments) |
112 | (setq parse-sexp-ignore-comments t) | |
ac5b21ac RS |
113 | (setq mode-line-process '("" scheme-mode-line-process))) |
114 | ||
115 | (defvar scheme-mode-line-process "") | |
116 | ||
117 | (defun scheme-mode-commands (map) | |
118 | (define-key map "\t" 'scheme-indent-line) | |
119 | (define-key map "\177" 'backward-delete-char-untabify) | |
120 | (define-key map "\e\C-q" 'scheme-indent-sexp)) | |
121 | ||
122 | (defvar scheme-mode-map nil) | |
123 | (if (not scheme-mode-map) | |
124 | (progn | |
125 | (setq scheme-mode-map (make-sparse-keymap)) | |
126 | (scheme-mode-commands scheme-mode-map))) | |
127 | \f | |
e2ab0aa6 | 128 | ;;;###autoload |
ac5b21ac RS |
129 | (defun scheme-mode () |
130 | "Major mode for editing Scheme code. | |
131 | Editing commands are similar to those of lisp-mode. | |
132 | ||
133 | In addition, if an inferior Scheme process is running, some additional | |
134 | commands will be defined, for evaluating expressions and controlling | |
135 | the interpreter, and the state of the process will be displayed in the | |
136 | modeline of all Scheme buffers. The names of commands that interact | |
137 | with the Scheme process start with \"xscheme-\". For more information | |
138 | see the documentation for xscheme-interaction-mode. | |
139 | ||
140 | Commands: | |
141 | Delete converts tabs to spaces as it moves back. | |
142 | Blank lines separate paragraphs. Semicolons start comments. | |
143 | \\{scheme-mode-map} | |
144 | Entry to this mode calls the value of scheme-mode-hook | |
145 | if that value is non-nil." | |
146 | (interactive) | |
147 | (kill-all-local-variables) | |
148 | (scheme-mode-initialize) | |
149 | (scheme-mode-variables) | |
150 | (run-hooks 'scheme-mode-hook)) | |
151 | ||
152 | (defun scheme-mode-initialize () | |
153 | (use-local-map scheme-mode-map) | |
154 | (setq major-mode 'scheme-mode) | |
155 | (setq mode-name "Scheme")) | |
156 | ||
157 | (defvar scheme-mit-dialect t | |
158 | "If non-nil, scheme mode is specialized for MIT Scheme. | |
159 | Set this to nil if you normally use another dialect.") | |
160 | \f | |
161 | (defun scheme-comment-indent (&optional pos) | |
162 | (save-excursion | |
163 | (if pos (goto-char pos)) | |
164 | (cond ((looking-at ";;;") (current-column)) | |
165 | ((looking-at ";;") | |
166 | (let ((tem (calculate-scheme-indent))) | |
167 | (if (listp tem) (car tem) tem))) | |
168 | (t | |
169 | (skip-chars-backward " \t") | |
170 | (max (if (bolp) 0 (1+ (current-column))) | |
171 | comment-column))))) | |
172 | ||
173 | (defvar scheme-indent-offset nil "") | |
174 | (defvar scheme-indent-function 'scheme-indent-function "") | |
175 | ||
176 | (defun scheme-indent-line (&optional whole-exp) | |
177 | "Indent current line as Scheme code. | |
178 | With argument, indent any additional lines of the same expression | |
179 | rigidly along with this one." | |
180 | (interactive "P") | |
181 | (let ((indent (calculate-scheme-indent)) shift-amt beg end | |
182 | (pos (- (point-max) (point)))) | |
183 | (beginning-of-line) | |
184 | (setq beg (point)) | |
185 | (skip-chars-forward " \t") | |
186 | (if (looking-at "[ \t]*;;;") | |
187 | ;; Don't alter indentation of a ;;; comment line. | |
188 | nil | |
189 | (if (listp indent) (setq indent (car indent))) | |
190 | (setq shift-amt (- indent (current-column))) | |
191 | (if (zerop shift-amt) | |
192 | nil | |
193 | (delete-region beg (point)) | |
194 | (indent-to indent)) | |
195 | ;; If initial point was within line's indentation, | |
196 | ;; position after the indentation. Else stay at same point in text. | |
197 | (if (> (- (point-max) pos) (point)) | |
198 | (goto-char (- (point-max) pos))) | |
199 | ;; If desired, shift remaining lines of expression the same amount. | |
200 | (and whole-exp (not (zerop shift-amt)) | |
201 | (save-excursion | |
202 | (goto-char beg) | |
203 | (forward-sexp 1) | |
204 | (setq end (point)) | |
205 | (goto-char beg) | |
206 | (forward-line 1) | |
207 | (setq beg (point)) | |
208 | (> end beg)) | |
209 | (indent-code-rigidly beg end shift-amt))))) | |
210 | \f | |
211 | (defun calculate-scheme-indent (&optional parse-start) | |
212 | "Return appropriate indentation for current line as scheme code. | |
213 | In usual case returns an integer: the column to indent to. | |
214 | Can instead return a list, whose car is the column to indent to. | |
215 | This means that following lines at the same level of indentation | |
216 | should not necessarily be indented the same way. | |
217 | The second element of the list is the buffer position | |
218 | of the start of the containing expression." | |
219 | (save-excursion | |
220 | (beginning-of-line) | |
221 | (let ((indent-point (point)) state paren-depth desired-indent (retry t) | |
222 | last-sexp containing-sexp first-sexp-list-p) | |
223 | (if parse-start | |
224 | (goto-char parse-start) | |
225 | (beginning-of-defun)) | |
226 | ;; Find outermost containing sexp | |
227 | (while (< (point) indent-point) | |
228 | (setq state (parse-partial-sexp (point) indent-point 0))) | |
229 | ;; Find innermost containing sexp | |
230 | (while (and retry (setq paren-depth (car state)) (> paren-depth 0)) | |
231 | (setq retry nil) | |
232 | (setq last-sexp (nth 2 state)) | |
233 | (setq containing-sexp (car (cdr state))) | |
234 | ;; Position following last unclosed open. | |
235 | (goto-char (1+ containing-sexp)) | |
236 | ;; Is there a complete sexp since then? | |
237 | (if (and last-sexp (> last-sexp (point))) | |
238 | ;; Yes, but is there a containing sexp after that? | |
239 | (let ((peek (parse-partial-sexp last-sexp indent-point 0))) | |
240 | (if (setq retry (car (cdr peek))) (setq state peek)))) | |
241 | (if (not retry) | |
242 | ;; Innermost containing sexp found | |
243 | (progn | |
244 | (goto-char (1+ containing-sexp)) | |
245 | (if (not last-sexp) | |
246 | ;; indent-point immediately follows open paren. | |
247 | ;; Don't call hook. | |
248 | (setq desired-indent (current-column)) | |
249 | ;; Move to first sexp after containing open paren | |
250 | (parse-partial-sexp (point) last-sexp 0 t) | |
251 | (setq first-sexp-list-p (looking-at "\\s(")) | |
252 | (cond | |
253 | ((> (save-excursion (forward-line 1) (point)) | |
254 | last-sexp) | |
255 | ;; Last sexp is on same line as containing sexp. | |
256 | ;; It's almost certainly a function call. | |
257 | (parse-partial-sexp (point) last-sexp 0 t) | |
258 | (if (/= (point) last-sexp) | |
259 | ;; Indent beneath first argument or, if only one sexp | |
260 | ;; on line, indent beneath that. | |
261 | (progn (forward-sexp 1) | |
262 | (parse-partial-sexp (point) last-sexp 0 t))) | |
263 | (backward-prefix-chars)) | |
264 | (t | |
265 | ;; Indent beneath first sexp on same line as last-sexp. | |
266 | ;; Again, it's almost certainly a function call. | |
267 | (goto-char last-sexp) | |
268 | (beginning-of-line) | |
269 | (parse-partial-sexp (point) last-sexp 0 t) | |
270 | (backward-prefix-chars))))))) | |
271 | ;; If looking at a list, don't call hook. | |
272 | (if first-sexp-list-p | |
273 | (setq desired-indent (current-column))) | |
274 | ;; Point is at the point to indent under unless we are inside a string. | |
eb8c3be9 | 275 | ;; Call indentation hook except when overridden by scheme-indent-offset |
ac5b21ac RS |
276 | ;; or if the desired indentation has already been computed. |
277 | (cond ((car (nthcdr 3 state)) | |
278 | ;; Inside a string, don't change indentation. | |
279 | (goto-char indent-point) | |
280 | (skip-chars-forward " \t") | |
281 | (setq desired-indent (current-column))) | |
282 | ((and (integerp scheme-indent-offset) containing-sexp) | |
283 | ;; Indent by constant offset | |
284 | (goto-char containing-sexp) | |
285 | (setq desired-indent (+ scheme-indent-offset (current-column)))) | |
286 | ((not (or desired-indent | |
287 | (and (boundp 'scheme-indent-function) | |
288 | scheme-indent-function | |
289 | (not retry) | |
290 | (setq desired-indent | |
291 | (funcall scheme-indent-function | |
292 | indent-point state))))) | |
293 | ;; Use default indentation if not computed yet | |
294 | (setq desired-indent (current-column)))) | |
295 | desired-indent))) | |
296 | \f | |
297 | (defun scheme-indent-function (indent-point state) | |
298 | (let ((normal-indent (current-column))) | |
299 | (save-excursion | |
300 | (goto-char (1+ (car (cdr state)))) | |
301 | (re-search-forward "\\sw\\|\\s_") | |
302 | (if (/= (point) (car (cdr state))) | |
303 | (let ((function (buffer-substring (progn (forward-char -1) (point)) | |
304 | (progn (forward-sexp 1) (point)))) | |
305 | method) | |
306 | ;; Who cares about this, really? | |
307 | ;(if (not (string-match "\\\\\\||" function))) | |
308 | (setq function (downcase function)) | |
309 | (setq method (get (intern-soft function) 'scheme-indent-function)) | |
310 | (cond ((integerp method) | |
311 | (scheme-indent-specform method state indent-point)) | |
312 | (method | |
313 | (funcall method state indent-point)) | |
314 | ((and (> (length function) 3) | |
315 | (string-equal (substring function 0 3) "def")) | |
316 | (scheme-indent-defform state indent-point)))))))) | |
317 | ||
318 | (defvar scheme-body-indent 2 "") | |
319 | \f | |
320 | (defun scheme-indent-specform (count state indent-point) | |
321 | (let ((containing-form-start (car (cdr state))) (i count) | |
322 | body-indent containing-form-column) | |
323 | ;; Move to the start of containing form, calculate indentation | |
324 | ;; to use for non-distinguished forms (> count), and move past the | |
325 | ;; function symbol. scheme-indent-function guarantees that there is at | |
326 | ;; least one word or symbol character following open paren of containing | |
327 | ;; form. | |
328 | (goto-char containing-form-start) | |
329 | (setq containing-form-column (current-column)) | |
330 | (setq body-indent (+ scheme-body-indent containing-form-column)) | |
331 | (forward-char 1) | |
332 | (forward-sexp 1) | |
333 | ;; Now find the start of the last form. | |
334 | (parse-partial-sexp (point) indent-point 1 t) | |
335 | (while (and (< (point) indent-point) | |
336 | (condition-case nil | |
337 | (progn | |
338 | (setq count (1- count)) | |
339 | (forward-sexp 1) | |
340 | (parse-partial-sexp (point) indent-point 1 t)) | |
341 | (error nil)))) | |
342 | ;; Point is sitting on first character of last (or count) sexp. | |
343 | (cond ((> count 0) | |
344 | ;; A distinguished form. Use double scheme-body-indent. | |
345 | (list (+ containing-form-column (* 2 scheme-body-indent)) | |
346 | containing-form-start)) | |
347 | ;; A non-distinguished form. Use body-indent if there are no | |
348 | ;; distinguished forms and this is the first undistinguished | |
349 | ;; form, or if this is the first undistinguished form and | |
350 | ;; the preceding distinguished form has indentation at least | |
351 | ;; as great as body-indent. | |
352 | ((and (= count 0) | |
353 | (or (= i 0) | |
354 | (<= body-indent normal-indent))) | |
355 | body-indent) | |
356 | (t | |
357 | normal-indent)))) | |
358 | ||
359 | (defun scheme-indent-defform (state indent-point) | |
360 | (goto-char (car (cdr state))) | |
361 | (forward-line 1) | |
362 | (if (> (point) (car (cdr (cdr state)))) | |
363 | (progn | |
364 | (goto-char (car (cdr state))) | |
365 | (+ scheme-body-indent (current-column))))) | |
366 | \f | |
367 | ;;; Let is different in Scheme | |
368 | ||
369 | (defun would-be-symbol (string) | |
370 | (not (string-equal (substring string 0 1) "("))) | |
371 | ||
372 | (defun next-sexp-as-string () | |
373 | ;; Assumes that protected by a save-excursion | |
374 | (forward-sexp 1) | |
375 | (let ((the-end (point))) | |
376 | (backward-sexp 1) | |
377 | (buffer-substring (point) the-end))) | |
378 | ||
379 | ;; This is correct but too slow. | |
380 | ;; The one below works almost always. | |
381 | ;;(defun scheme-let-indent (state indent-point) | |
382 | ;; (if (would-be-symbol (next-sexp-as-string)) | |
383 | ;; (scheme-indent-specform 2 state indent-point) | |
384 | ;; (scheme-indent-specform 1 state indent-point))) | |
385 | ||
386 | (defun scheme-let-indent (state indent-point) | |
387 | (skip-chars-forward " \t") | |
61361a07 | 388 | (if (looking-at "[-a-zA-Z0-9+*/?!@$%^&_:~]") |
ac5b21ac RS |
389 | (scheme-indent-specform 2 state indent-point) |
390 | (scheme-indent-specform 1 state indent-point))) | |
391 | ||
392 | ;; (put 'begin 'scheme-indent-function 0), say, causes begin to be indented | |
393 | ;; like defun if the first form is placed on the next line, otherwise | |
394 | ;; it is indented like any other form (i.e. forms line up under first). | |
395 | ||
396 | (put 'begin 'scheme-indent-function 0) | |
397 | (put 'case 'scheme-indent-function 1) | |
398 | (put 'delay 'scheme-indent-function 0) | |
399 | (put 'do 'scheme-indent-function 2) | |
400 | (put 'lambda 'scheme-indent-function 1) | |
401 | (put 'let 'scheme-indent-function 'scheme-let-indent) | |
402 | (put 'let* 'scheme-indent-function 1) | |
403 | (put 'letrec 'scheme-indent-function 1) | |
404 | (put 'sequence 'scheme-indent-function 0) | |
405 | ||
406 | (put 'call-with-input-file 'scheme-indent-function 1) | |
407 | (put 'with-input-from-file 'scheme-indent-function 1) | |
408 | (put 'with-input-from-port 'scheme-indent-function 1) | |
409 | (put 'call-with-output-file 'scheme-indent-function 1) | |
410 | (put 'with-output-to-file 'scheme-indent-function 1) | |
411 | (put 'with-output-to-port 'scheme-indent-function 1) | |
412 | \f | |
413 | ;;;; MIT Scheme specific indentation. | |
414 | ||
415 | (if scheme-mit-dialect | |
416 | (progn | |
417 | (put 'fluid-let 'scheme-indent-function 1) | |
418 | (put 'in-package 'scheme-indent-function 1) | |
419 | (put 'let-syntax 'scheme-indent-function 1) | |
420 | (put 'local-declare 'scheme-indent-function 1) | |
421 | (put 'macro 'scheme-indent-function 1) | |
422 | (put 'make-environment 'scheme-indent-function 0) | |
423 | (put 'named-lambda 'scheme-indent-function 1) | |
424 | (put 'using-syntax 'scheme-indent-function 1) | |
425 | ||
426 | (put 'with-input-from-string 'scheme-indent-function 1) | |
427 | (put 'with-output-to-string 'scheme-indent-function 0) | |
428 | (put 'with-values 'scheme-indent-function 1) | |
429 | ||
430 | (put 'syntax-table-define 'scheme-indent-function 2) | |
431 | (put 'list-transform-positive 'scheme-indent-function 1) | |
432 | (put 'list-transform-negative 'scheme-indent-function 1) | |
433 | (put 'list-search-positive 'scheme-indent-function 1) | |
434 | (put 'list-search-negative 'scheme-indent-function 1) | |
435 | ||
436 | (put 'access-components 'scheme-indent-function 1) | |
437 | (put 'assignment-components 'scheme-indent-function 1) | |
438 | (put 'combination-components 'scheme-indent-function 1) | |
439 | (put 'comment-components 'scheme-indent-function 1) | |
440 | (put 'conditional-components 'scheme-indent-function 1) | |
441 | (put 'disjunction-components 'scheme-indent-function 1) | |
442 | (put 'declaration-components 'scheme-indent-function 1) | |
443 | (put 'definition-components 'scheme-indent-function 1) | |
444 | (put 'delay-components 'scheme-indent-function 1) | |
445 | (put 'in-package-components 'scheme-indent-function 1) | |
446 | (put 'lambda-components 'scheme-indent-function 1) | |
447 | (put 'lambda-components* 'scheme-indent-function 1) | |
448 | (put 'lambda-components** 'scheme-indent-function 1) | |
449 | (put 'open-block-components 'scheme-indent-function 1) | |
450 | (put 'pathname-components 'scheme-indent-function 1) | |
451 | (put 'procedure-components 'scheme-indent-function 1) | |
452 | (put 'sequence-components 'scheme-indent-function 1) | |
453 | (put 'unassigned\?-components 'scheme-indent-function 1) | |
454 | (put 'unbound\?-components 'scheme-indent-function 1) | |
455 | (put 'variable-components 'scheme-indent-function 1))) | |
456 | \f | |
457 | (defun scheme-indent-sexp () | |
458 | "Indent each line of the list starting just after point." | |
459 | (interactive) | |
460 | (let ((indent-stack (list nil)) (next-depth 0) bol | |
461 | outer-loop-done inner-loop-done state this-indent) | |
462 | (save-excursion (forward-sexp 1)) | |
463 | (save-excursion | |
464 | (setq outer-loop-done nil) | |
465 | (while (not outer-loop-done) | |
466 | (setq last-depth next-depth | |
467 | innerloop-done nil) | |
468 | (while (and (not innerloop-done) | |
469 | (not (setq outer-loop-done (eobp)))) | |
470 | (setq state (parse-partial-sexp (point) (progn (end-of-line) (point)) | |
471 | nil nil state)) | |
472 | (setq next-depth (car state)) | |
473 | (if (car (nthcdr 4 state)) | |
474 | (progn (indent-for-comment) | |
475 | (end-of-line) | |
476 | (setcar (nthcdr 4 state) nil))) | |
477 | (if (car (nthcdr 3 state)) | |
478 | (progn | |
479 | (forward-line 1) | |
480 | (setcar (nthcdr 5 state) nil)) | |
481 | (setq innerloop-done t))) | |
482 | (if (setq outer-loop-done (<= next-depth 0)) | |
483 | nil | |
484 | (while (> last-depth next-depth) | |
485 | (setq indent-stack (cdr indent-stack) | |
486 | last-depth (1- last-depth))) | |
487 | (while (< last-depth next-depth) | |
488 | (setq indent-stack (cons nil indent-stack) | |
489 | last-depth (1+ last-depth))) | |
490 | (forward-line 1) | |
491 | (setq bol (point)) | |
492 | (skip-chars-forward " \t") | |
493 | (if (or (eobp) (looking-at "[;\n]")) | |
494 | nil | |
495 | (if (and (car indent-stack) | |
496 | (>= (car indent-stack) 0)) | |
497 | (setq this-indent (car indent-stack)) | |
498 | (let ((val (calculate-scheme-indent | |
499 | (if (car indent-stack) (- (car indent-stack)))))) | |
500 | (if (integerp val) | |
501 | (setcar indent-stack | |
502 | (setq this-indent val)) | |
3a3f61fa RS |
503 | (if (cdr val) |
504 | (setcar indent-stack (- (car (cdr val))))) | |
ac5b21ac RS |
505 | (setq this-indent (car val))))) |
506 | (if (/= (current-column) this-indent) | |
507 | (progn (delete-region bol (point)) | |
508 | (indent-to this-indent))))))))) | |
49116ac0 JB |
509 | |
510 | (provide 'scheme) | |
c88ab9ce ER |
511 | |
512 | ;;; scheme.el ends here |