1 ;;; fortran.el --- Fortran mode for GNU Emacs
3 ;; Copyright (c) 1986, 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
5 ;; Author: Michael D. Prange <prange@erl.mit.edu>
6 ;; Maintainer: bug-fortran-mode@erl.mit.edu (Steve Gildea and others)
7 ;; Version 1.30.6 (July 27, 1995)
10 ;; This file is part of GNU Emacs.
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
14 ;; the Free Software Foundation; either version 2, or (at your option)
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.
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 the
24 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
25 ;; Boston, MA 02111-1307, USA.
29 ;; Fortran mode has been upgraded and is now maintained by Stephen A. Wood
30 ;; (saw@cebaf.gov). It now will use either fixed format continuation line
31 ;; markers (character in 6th column), or tab format continuation line style
32 ;; (digit after a TAB character.) A auto-fill mode has been added to
33 ;; automatically wrap fortran lines that get too long.
35 ;; We acknowledge many contributions and valuable suggestions by
36 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
37 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
38 ;; Gary Sabot and Richard Stallman.
40 ;; This file may be used with GNU Emacs version 18.xx if the following
41 ;; variable and function substitutions are made.
43 ;; frame-width with screen-width
44 ;; auto-fill-function with auto-fill-hook
45 ;; comment-indent-function with comment-indent-hook
46 ;; (setq unread-command-events (list c)) with (setq unread-command-char c)
48 ;; Bugs to bug-fortran-mode@erl.mit.edu
52 (defconst fortran-mode-version
"version 1.30.6")
55 "Fortran mode for Emacs"
58 (defgroup fortran-indent nil
59 "Indentation variables in Fortran mode"
63 (defgroup fortran-comment nil
64 "Comment-handling variables in Fortran mode"
70 (defcustom fortran-tab-mode-default nil
71 "*Default tabbing/carriage control style for empty files in Fortran mode.
72 A value of t specifies tab-digit style of continuation control.
73 A value of nil specifies that continuation lines are marked
74 with a character in column 6."
76 :group
'fortran-indent
)
78 ;; Buffer local, used to display mode line.
79 (defcustom fortran-tab-mode-string nil
80 "String to appear in mode line when TAB format mode is on."
81 :type
'(choice (const nil
) string
)
82 :group
'fortran-indent
)
84 (defcustom fortran-do-indent
3
85 "*Extra indentation applied to DO blocks."
87 :group
'fortran-indent
)
89 (defcustom fortran-if-indent
3
90 "*Extra indentation applied to IF blocks."
92 :group
'fortran-indent
)
94 (defcustom fortran-structure-indent
3
95 "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
97 :group
'fortran-indent
)
99 (defcustom fortran-continuation-indent
5
100 "*Extra indentation applied to Fortran continuation lines."
102 :group
'fortran-indent
)
104 (defcustom fortran-comment-indent-style
'fixed
105 "*nil forces comment lines not to be touched,
106 'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
107 columns beyond `fortran-minimum-statement-indent-fixed' (for
108 `indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
109 `indent-tabs-mode' of t), and 'relative indents to current
110 Fortran indentation plus `fortran-comment-line-extra-indent'."
111 :type
'(radio (const nil
) (const fixed
) (const relative
))
112 :group
'fortran-indent
)
114 (defcustom fortran-comment-line-extra-indent
0
115 "*Amount of extra indentation for text within full-line comments."
117 :group
'fortran-indent
118 :group
'fortran-comment
)
120 (defcustom comment-line-start nil
121 "*Delimiter inserted to start new full-line comment."
122 :type
'(choice string
(const nil
))
123 :group
'fortran-comment
)
125 (defcustom comment-line-start-skip nil
126 "*Regexp to match the start of a full-line comment."
127 :type
'(choice string
(const nil
))
128 :group
'fortran-comment
)
130 (defcustom fortran-minimum-statement-indent-fixed
6
131 "*Minimum statement indentation for fixed format continuation style."
133 :group
'fortran-indent
)
135 (defcustom fortran-minimum-statement-indent-tab
(max tab-width
6)
136 "*Minimum statement indentation for TAB format continuation style."
138 :group
'fortran-indent
)
140 ;; Note that this is documented in the v18 manuals as being a string
141 ;; of length one rather than a single character.
142 ;; The code in this file accepts either format for compatibility.
143 (defcustom fortran-comment-indent-char
" "
144 "*Single-character string inserted for Fortran comment indentation.
147 :group
'fortran-comment
)
149 (defcustom fortran-line-number-indent
1
150 "*Maximum indentation for Fortran line numbers.
151 5 means right-justify them within their five-column field."
153 :group
'fortran-indent
)
155 (defcustom fortran-check-all-num-for-matching-do nil
156 "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
160 (defcustom fortran-blink-matching-if nil
161 "*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
162 Also, from an ENDDO statement blink on matching DO [WHILE] statement."
166 (defcustom fortran-continuation-string
"$"
167 "*Single-character string used for Fortran continuation lines.
168 In fixed format continuation style, this character is inserted in
169 column 6 by \\[fortran-split-line] to begin a continuation line.
170 Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
171 convert the line into a continuation line of the appropriate style.
176 (defcustom fortran-comment-region
"c$$$"
177 "*String inserted by \\[fortran-comment-region]\
178 at start of each line in region."
180 :group
'fortran-comment
)
182 (defcustom fortran-electric-line-number t
183 "*Non-nil causes line number digits to be moved to the correct column as\
188 (defcustom fortran-startup-message t
189 "*Non-nil displays a startup message when Fortran mode is first called."
193 (defvar fortran-column-ruler-fixed
194 "0 4 6 10 20 30 40 5\
196 \[ ]|{ | | | | | | | | \
198 "*String displayed above current line by \\[fortran-column-ruler].
199 This variable used in fixed format mode.")
201 (defvar fortran-column-ruler-tab
204 \[ ]| { | | | | | | | | \
206 "*String displayed above current line by \\[fortran-column-ruler].
207 This variable used in TAB format mode.")
209 (defconst bug-fortran-mode
"bug-fortran-mode@erl.mit.edu"
210 "Address of mailing list for Fortran mode bugs.")
212 (defvar fortran-mode-syntax-table nil
213 "Syntax table in use in Fortran mode buffers.")
215 (defvar fortran-analyze-depth
100
216 "Number of lines to scan to determine whether to use fixed or TAB format\
219 (defcustom fortran-break-before-delimiters t
220 "*Non-nil causes `fortran-fill' to break lines before delimiters."
224 (if fortran-mode-syntax-table
226 (setq fortran-mode-syntax-table
(make-syntax-table))
227 (modify-syntax-entry ?\
; "w" fortran-mode-syntax-table)
228 (modify-syntax-entry ?
\r " " fortran-mode-syntax-table
)
229 (modify-syntax-entry ?
+ "." fortran-mode-syntax-table
)
230 (modify-syntax-entry ?-
"." fortran-mode-syntax-table
)
231 (modify-syntax-entry ?
= "." fortran-mode-syntax-table
)
232 (modify-syntax-entry ?
* "." fortran-mode-syntax-table
)
233 (modify-syntax-entry ?
/ "." fortran-mode-syntax-table
)
234 (modify-syntax-entry ?
\' "\"" fortran-mode-syntax-table
)
235 (modify-syntax-entry ?
\" "\"" fortran-mode-syntax-table
)
236 (modify-syntax-entry ?
\\ "/" fortran-mode-syntax-table
)
237 (modify-syntax-entry ?.
"w" fortran-mode-syntax-table
)
238 (modify-syntax-entry ?_
"w" fortran-mode-syntax-table
)
239 (modify-syntax-entry ?\
! "<" fortran-mode-syntax-table
)
240 (modify-syntax-entry ?
\n ">" fortran-mode-syntax-table
))
242 ;; Comments are real pain in Fortran because there is no way to represent the
243 ;; standard comment syntax in an Emacs syntax table (we can for VAX-style).
244 ;; Therefore an unmatched quote in a standard comment will throw fontification
245 ;; off on the wrong track. So we do syntactic fontification with regexps.
247 ;; Regexps done by simon@gnu with help from Ulrik Dickow <dickow@nbi.dk> and
248 ;; probably others Si's forgotten about (sorry).
250 (defconst fortran-font-lock-keywords-1 nil
251 "Subdued level highlighting for Fortran mode.")
253 (defconst fortran-font-lock-keywords-2 nil
254 "Medium level highlighting for Fortran mode.")
256 (defconst fortran-font-lock-keywords-3 nil
257 "Gaudy level highlighting for Fortran mode.")
259 (let ((comment-chars "c!*")
262 ; (let ((simple-types '("character" "byte" "integer" "logical"
263 ; "none" "real" "complex"
264 ; "double[ \t]*precision" "double[ \t]*complex"))
265 ; (structured-types '("structure" "union" "map"))
266 ; (other-types '("record" "dimension" "parameter" "common" "save"
267 ; "external" "intrinsic" "data" "equivalence")))
269 ; (mapcar (lambda (x) (concat "implicit[ \t]*" x)) simple-types)
271 ; (mapcar (lambda (x) (concat "end[ \t]*" x)) structured-types)
274 (concat "byte\\|c\\(haracter\\|om\\(mon\\|plex\\)\\)\\|"
275 "d\\(ata\\|imension\\|ouble"
276 "[ \t]*\\(complex\\|precision\\)\\)\\|"
277 "e\\(nd[ \t]*\\(map\\|structure\\|union\\)\\|"
278 "quivalence\\|xternal\\)\\|"
279 "i\\(mplicit[ \t]*\\(byte\\|"
280 "c\\(haracter\\|omplex\\)\\|"
281 "double[ \t]*\\(complex\\|precision\\)\\|"
282 "integer\\|logical\\|none\\|real\\)\\|"
283 "nt\\(eger\\|rinsic\\)\\)\\|"
284 "logical\\|map\\|none\\|parameter\\|re\\(al\\|cord\\)\\|"
285 "s\\(ave\\|tructure\\)\\|union"))
287 ; ("continue" "format" "end" "enddo" "if" "then" "else" "endif"
288 ; "elseif" "while" "inquire" "stop" "return" "include" "open"
289 ; "close" "read" "write" "format" "print")
290 (concat "c\\(lose\\|ontinue\\)\\|"
291 "e\\(lse\\(\\|if\\)\\|nd\\(\\|do\\|if\\)\\)\\|format\\|"
292 "i\\(f\\|n\\(clude\\|quire\\)\\)\\|open\\|print\\|"
293 "re\\(ad\\|turn\\)\\|stop\\|then\\|w\\(hile\\|rite\\)"))
295 ; ("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne" "true" "false")
296 "and\\|eq\\|false\\|g[et]\\|l[et]\\|n\\(e\\|ot\\)\\|or\\|true"))
298 (setq fortran-font-lock-keywords-1
301 ;; Fontify syntactically (assuming strings cannot be quoted or span lines).
302 (cons (concat "^[" comment-chars
"].*") 'font-lock-comment-face
)
303 '(fortran-match-!-comment . font-lock-comment-face
)
304 (list (concat "^[^" comment-chars
"\t\n]" (make-string 71 ?.
) "\\(.*\\)")
305 '(1 font-lock-comment-face
))
306 '("'[^'\n]*'?" . font-lock-string-face
)
308 ;; Program, subroutine and function declarations, plus calls.
309 (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
310 "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
311 '(1 font-lock-keyword-face
)
312 '(2 font-lock-function-name-face nil t
))))
314 (setq fortran-font-lock-keywords-2
315 (append fortran-font-lock-keywords-1
318 ;; Fontify all type specifiers (must be first; see below).
319 (cons (concat "\\<\\(" fortran-type-types
"\\)\\>") 'font-lock-type-face
)
321 ;; Fontify all builtin keywords (except logical, do and goto; see below).
322 (concat "\\<\\(" fortran-keywords
"\\)\\>")
324 ;; Fontify all builtin operators.
325 (concat "\\.\\(" fortran-logicals
"\\)\\.")
327 ;; Fontify do/goto keywords and targets, and goto tags.
328 (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
329 '(1 font-lock-keyword-face
)
330 '(2 font-lock-reference-face nil t
))
331 (cons "^ *\\([0-9]+\\)" 'font-lock-reference-face
))))
333 (setq fortran-font-lock-keywords-3
336 ;; The list `fortran-font-lock-keywords-1'.
337 fortran-font-lock-keywords-1
339 ;; Fontify all type specifiers plus their declared items.
341 (list (concat "\\<\\(" fortran-type-types
"\\)\\>[ \t(/]*\\(*\\)?")
342 ;; Fontify the type specifier.
343 '(1 font-lock-type-face
)
344 ;; Fontify each declaration item (or just the /.../ block name).
345 '(font-lock-match-c-style-declaration-item-and-skip-to-next
346 ;; Start after any *(...) expression.
347 (and (match-beginning 15) (forward-sexp 1))
348 ;; No need to clean up.
350 ;; Fontify as a variable name, functions are fontified elsewhere.
351 (1 font-lock-variable-name-face nil t
))))
353 ;; Things extra to `fortran-font-lock-keywords-3' (must be done first).
356 ;; Fontify goto-like `err=label'/`end=label' in read/write statements.
357 '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
358 (1 font-lock-keyword-face
) (4 font-lock-reference-face nil t
))
360 ;; Highlight standard continuation character and in a TAB-formatted line.
361 '("^ \\([^ 0]\\)" 1 font-lock-string-face
)
362 '("^\t\\([1-9]\\)" 1 font-lock-string-face
))
364 ;; The list `fortran-font-lock-keywords-2' less that for types (see above).
365 (cdr (nthcdr (length fortran-font-lock-keywords-1
)
366 fortran-font-lock-keywords-2
))))
369 (defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
370 "Default expressions to highlight in Fortran mode.")
373 (defvar fortran-mode-map
()
374 "Keymap used in Fortran mode.")
377 (setq fortran-mode-map
(make-sparse-keymap))
378 (define-key fortran-mode-map
";" 'fortran-abbrev-start
)
379 (define-key fortran-mode-map
"\C-c;" 'fortran-comment-region
)
380 (define-key fortran-mode-map
"\e\C-a" 'beginning-of-fortran-subprogram
)
381 (define-key fortran-mode-map
"\e\C-e" 'end-of-fortran-subprogram
)
382 (define-key fortran-mode-map
"\e;" 'fortran-indent-comment
)
383 (define-key fortran-mode-map
"\e\C-h" 'mark-fortran-subprogram
)
384 (define-key fortran-mode-map
"\e\n" 'fortran-split-line
)
385 (define-key fortran-mode-map
"\n" 'fortran-indent-new-line
)
386 (define-key fortran-mode-map
"\e\C-q" 'fortran-indent-subprogram
)
387 (define-key fortran-mode-map
"\C-c\C-w" 'fortran-window-create-momentarily
)
388 (define-key fortran-mode-map
"\C-c\C-r" 'fortran-column-ruler
)
389 (define-key fortran-mode-map
"\C-c\C-p" 'fortran-previous-statement
)
390 (define-key fortran-mode-map
"\C-c\C-n" 'fortran-next-statement
)
391 (define-key fortran-mode-map
"\t" 'fortran-indent-line
)
392 (define-key fortran-mode-map
"0" 'fortran-electric-line-number
)
393 (define-key fortran-mode-map
"1" 'fortran-electric-line-number
)
394 (define-key fortran-mode-map
"2" 'fortran-electric-line-number
)
395 (define-key fortran-mode-map
"3" 'fortran-electric-line-number
)
396 (define-key fortran-mode-map
"4" 'fortran-electric-line-number
)
397 (define-key fortran-mode-map
"5" 'fortran-electric-line-number
)
398 (define-key fortran-mode-map
"6" 'fortran-electric-line-number
)
399 (define-key fortran-mode-map
"7" 'fortran-electric-line-number
)
400 (define-key fortran-mode-map
"8" 'fortran-electric-line-number
)
401 (define-key fortran-mode-map
"9" 'fortran-electric-line-number
))
403 (defvar fortran-mode-abbrev-table nil
)
404 (if fortran-mode-abbrev-table
406 (let ((ac abbrevs-changed
))
407 (define-abbrev-table 'fortran-mode-abbrev-table
())
408 (define-abbrev fortran-mode-abbrev-table
";au" "automatic" nil
)
409 (define-abbrev fortran-mode-abbrev-table
";b" "byte" nil
)
410 (define-abbrev fortran-mode-abbrev-table
";bd" "block data" nil
)
411 (define-abbrev fortran-mode-abbrev-table
";ch" "character" nil
)
412 (define-abbrev fortran-mode-abbrev-table
";cl" "close" nil
)
413 (define-abbrev fortran-mode-abbrev-table
";c" "continue" nil
)
414 (define-abbrev fortran-mode-abbrev-table
";cm" "common" nil
)
415 (define-abbrev fortran-mode-abbrev-table
";cx" "complex" nil
)
416 (define-abbrev fortran-mode-abbrev-table
";df" "define" nil
)
417 (define-abbrev fortran-mode-abbrev-table
";di" "dimension" nil
)
418 (define-abbrev fortran-mode-abbrev-table
";do" "double" nil
)
419 (define-abbrev fortran-mode-abbrev-table
";dc" "double complex" nil
)
420 (define-abbrev fortran-mode-abbrev-table
";dp" "double precision" nil
)
421 (define-abbrev fortran-mode-abbrev-table
";dw" "do while" nil
)
422 (define-abbrev fortran-mode-abbrev-table
";e" "else" nil
)
423 (define-abbrev fortran-mode-abbrev-table
";ed" "enddo" nil
)
424 (define-abbrev fortran-mode-abbrev-table
";el" "elseif" nil
)
425 (define-abbrev fortran-mode-abbrev-table
";en" "endif" nil
)
426 (define-abbrev fortran-mode-abbrev-table
";eq" "equivalence" nil
)
427 (define-abbrev fortran-mode-abbrev-table
";ew" "endwhere" nil
)
428 (define-abbrev fortran-mode-abbrev-table
";ex" "external" nil
)
429 (define-abbrev fortran-mode-abbrev-table
";ey" "entry" nil
)
430 (define-abbrev fortran-mode-abbrev-table
";f" "format" nil
)
431 (define-abbrev fortran-mode-abbrev-table
";fa" ".false." nil
)
432 (define-abbrev fortran-mode-abbrev-table
";fu" "function" nil
)
433 (define-abbrev fortran-mode-abbrev-table
";g" "goto" nil
)
434 (define-abbrev fortran-mode-abbrev-table
";im" "implicit" nil
)
435 (define-abbrev fortran-mode-abbrev-table
";ib" "implicit byte" nil
)
436 (define-abbrev fortran-mode-abbrev-table
";ic" "implicit complex" nil
)
437 (define-abbrev fortran-mode-abbrev-table
";ich" "implicit character" nil
)
438 (define-abbrev fortran-mode-abbrev-table
";ii" "implicit integer" nil
)
439 (define-abbrev fortran-mode-abbrev-table
";il" "implicit logical" nil
)
440 (define-abbrev fortran-mode-abbrev-table
";ir" "implicit real" nil
)
441 (define-abbrev fortran-mode-abbrev-table
";inc" "include" nil
)
442 (define-abbrev fortran-mode-abbrev-table
";in" "integer" nil
)
443 (define-abbrev fortran-mode-abbrev-table
";intr" "intrinsic" nil
)
444 (define-abbrev fortran-mode-abbrev-table
";l" "logical" nil
)
445 (define-abbrev fortran-mode-abbrev-table
";n" "namelist" nil
)
446 (define-abbrev fortran-mode-abbrev-table
";o" "open" nil
) ; was ;op
447 (define-abbrev fortran-mode-abbrev-table
";pa" "parameter" nil
)
448 (define-abbrev fortran-mode-abbrev-table
";pr" "program" nil
)
449 (define-abbrev fortran-mode-abbrev-table
";ps" "pause" nil
)
450 (define-abbrev fortran-mode-abbrev-table
";p" "print" nil
)
451 (define-abbrev fortran-mode-abbrev-table
";rc" "record" nil
)
452 (define-abbrev fortran-mode-abbrev-table
";re" "real" nil
)
453 (define-abbrev fortran-mode-abbrev-table
";r" "read" nil
)
454 (define-abbrev fortran-mode-abbrev-table
";rt" "return" nil
)
455 (define-abbrev fortran-mode-abbrev-table
";rw" "rewind" nil
)
456 (define-abbrev fortran-mode-abbrev-table
";s" "stop" nil
)
457 (define-abbrev fortran-mode-abbrev-table
";sa" "save" nil
)
458 (define-abbrev fortran-mode-abbrev-table
";st" "structure" nil
)
459 (define-abbrev fortran-mode-abbrev-table
";sc" "static" nil
)
460 (define-abbrev fortran-mode-abbrev-table
";su" "subroutine" nil
)
461 (define-abbrev fortran-mode-abbrev-table
";tr" ".true." nil
)
462 (define-abbrev fortran-mode-abbrev-table
";ty" "type" nil
)
463 (define-abbrev fortran-mode-abbrev-table
";vo" "volatile" nil
)
464 (define-abbrev fortran-mode-abbrev-table
";w" "write" nil
)
465 (define-abbrev fortran-mode-abbrev-table
";wh" "where" nil
)
466 (setq abbrevs-changed ac
)))
469 (defun fortran-mode ()
470 "Major mode for editing Fortran code.
471 \\[fortran-indent-line] indents the current Fortran line correctly.
472 DO statements must not share a common CONTINUE.
474 Type ;? or ;\\[help-command] to display a list of built-in\
475 abbrevs for Fortran keywords.
480 Variables controlling indentation style and extra features:
483 Normally nil in Fortran mode. If you want to use comments
484 starting with `!', set this to the string \"!\".
486 Extra indentation within do blocks. (default 3)
488 Extra indentation within if blocks. (default 3)
489 fortran-structure-indent
490 Extra indentation within structure, union, map and interface blocks.
492 fortran-continuation-indent
493 Extra indentation applied to continuation statements. (default 5)
494 fortran-comment-line-extra-indent
495 Amount of extra indentation for text within full-line comments. (default 0)
496 fortran-comment-indent-style
497 nil means don't change indentation of text in full-line comments,
498 fixed means indent that text at `fortran-comment-line-extra-indent' beyond
499 the value of `fortran-minimum-statement-indent-fixed' (for fixed
500 format continuation style) or `fortran-minimum-statement-indent-tab'
501 (for TAB format continuation style).
502 relative means indent at `fortran-comment-line-extra-indent' beyond the
503 indentation for a line of code.
505 fortran-comment-indent-char
506 Single-character string to be inserted instead of space for
507 full-line comment indentation. (default \" \")
508 fortran-minimum-statement-indent-fixed
509 Minimum indentation for Fortran statements in fixed format mode. (def.6)
510 fortran-minimum-statement-indent-tab
511 Minimum indentation for Fortran statements in TAB format mode. (default 9)
512 fortran-line-number-indent
513 Maximum indentation for line numbers. A line number will get
514 less than this much indentation if necessary to avoid reaching
515 column 5. (default 1)
516 fortran-check-all-num-for-matching-do
517 Non-nil causes all numbered lines to be treated as possible \"continue\"
518 statements. (default nil)
519 fortran-blink-matching-if
520 Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
521 matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
522 statement. (default nil)
523 fortran-continuation-string
524 Single-character string to be inserted in column 5 of a continuation
525 line. (default \"$\")
526 fortran-comment-region
527 String inserted by \\[fortran-comment-region] at start of each line in
528 region. (default \"c$$$\")
529 fortran-electric-line-number
530 Non-nil causes line number digits to be moved to the correct column
531 as typed. (default t)
532 fortran-break-before-delimiters
533 Non-nil causes `fortran-fill' breaks lines before delimiters.
535 fortran-startup-message
536 Set to nil to inhibit message first time Fortran mode is used.
538 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
539 with no args, if that value is non-nil."
541 (kill-all-local-variables)
542 (if fortran-startup-message
543 (message "Emacs Fortran mode %s. Bugs to %s"
544 fortran-mode-version bug-fortran-mode
))
545 (setq fortran-startup-message nil
)
546 (setq local-abbrev-table fortran-mode-abbrev-table
)
547 (set-syntax-table fortran-mode-syntax-table
)
548 ;; Font Lock mode support.
549 (make-local-variable 'font-lock-defaults
)
550 (setq font-lock-defaults
'((fortran-font-lock-keywords
551 fortran-font-lock-keywords-1
552 fortran-font-lock-keywords-2
553 fortran-font-lock-keywords-3
)
555 (make-local-variable 'fortran-break-before-delimiters
)
556 (setq fortran-break-before-delimiters t
)
557 (make-local-variable 'indent-line-function
)
558 (setq indent-line-function
'fortran-indent-line
)
559 (make-local-variable 'comment-indent-function
)
560 (setq comment-indent-function
'fortran-comment-hook
)
561 (make-local-variable 'comment-line-start-skip
)
562 (setq comment-line-start-skip
563 "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
564 (make-local-variable 'comment-line-start
)
565 (setq comment-line-start
"c")
566 (make-local-variable 'comment-start-skip
)
567 (setq comment-start-skip
"![ \t]*")
568 (make-local-variable 'comment-start
)
569 (setq comment-start nil
)
570 (make-local-variable 'require-final-newline
)
571 (setq require-final-newline t
)
572 (make-local-variable 'abbrev-all-caps
)
573 (setq abbrev-all-caps t
)
574 (make-local-variable 'indent-tabs-mode
)
575 (setq indent-tabs-mode nil
)
576 ;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
577 (setq fill-column
72) ; Already local?
578 (use-local-map fortran-mode-map
)
579 (setq mode-name
"Fortran")
580 (setq major-mode
'fortran-mode
)
581 ;;;(make-local-variable 'fortran-tab-mode)
582 (make-local-variable 'fortran-comment-line-extra-indent
)
583 (make-local-variable 'fortran-minimum-statement-indent-fixed
)
584 (make-local-variable 'fortran-minimum-statement-indent-tab
)
585 (make-local-variable 'fortran-column-ruler-fixed
)
586 (make-local-variable 'fortran-column-ruler-tab
)
587 (make-local-variable 'fortran-tab-mode-string
)
588 (setq fortran-tab-mode-string
" TAB-format")
589 (setq indent-tabs-mode
(fortran-analyze-file-format))
590 (run-hooks 'fortran-mode-hook
))
592 (defun fortran-comment-hook ()
594 (skip-chars-backward " \t")
595 (max (+ 1 (current-column))
598 (defun fortran-indent-comment ()
599 "Align or create comment on current line.
600 Existing comments of all types are recognized and aligned.
601 If the line has no comment, a side-by-side comment is inserted and aligned
602 if the value of comment-start is not nil.
603 Otherwise, a separate-line comment is inserted, on this line
604 or on a new line inserted before this line if this line is not blank."
607 ;; Recognize existing comments of either kind.
608 (cond ((looking-at comment-line-start-skip
)
609 (fortran-indent-line))
610 ((fortran-find-comment-start-skip) ; catches any inline comment and
611 ; leaves point after comment-start-skip
612 (if comment-start-skip
613 (progn (goto-char (match-beginning 0))
614 (if (not (= (current-column) (fortran-comment-hook)))
615 (progn (delete-horizontal-space)
616 (indent-to (fortran-comment-hook)))))
617 (end-of-line))) ; otherwise goto end of line or sth else?
618 ;; No existing comment.
619 ;; If side-by-side comments are defined, insert one,
620 ;; unless line is now blank.
621 ((and comment-start
(not (looking-at "^[ \t]*$")))
623 (delete-horizontal-space)
624 (indent-to (fortran-comment-hook))
625 (insert comment-start
))
626 ;; Else insert separate-line comment, making a new line if nec.
628 (if (looking-at "^[ \t]*$")
629 (delete-horizontal-space)
633 (insert comment-line-start
)
634 (insert-char (if (stringp fortran-comment-indent-char
)
635 (aref fortran-comment-indent-char
0)
636 fortran-comment-indent-char
)
637 (- (calculate-fortran-indent) (current-column))))))
639 (defun fortran-comment-region (beg-region end-region arg
)
640 "Comments every line in the region.
641 Puts fortran-comment-region at the beginning of every line in the region.
642 BEG-REGION and END-REGION are args which specify the region boundaries.
643 With non-nil ARG, uncomments the region."
644 (interactive "*r\nP")
645 (let ((end-region-mark (make-marker)) (save-point (point-marker)))
646 (set-marker end-region-mark end-region
)
647 (goto-char beg-region
)
649 (if (not arg
) ;comment the region
650 (progn (insert fortran-comment-region
)
651 (while (and (= (forward-line 1) 0)
652 (< (point) end-region-mark
))
653 (insert fortran-comment-region
)))
654 (let ((com (regexp-quote fortran-comment-region
))) ;uncomment the region
656 (delete-region (point) (match-end 0)))
657 (while (and (= (forward-line 1) 0)
658 (< (point) end-region-mark
))
660 (delete-region (point) (match-end 0))))))
661 (goto-char save-point
)
662 (set-marker end-region-mark nil
)
663 (set-marker save-point nil
)))
665 (defun fortran-abbrev-start ()
666 "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
667 Any other key combination is executed normally."
670 (insert last-command-char
)
671 (if (or (eq (setq c
(read-event)) ??
) ;insert char if not equal to `?'
673 (fortran-abbrev-help)
674 (setq unread-command-events
(list c
)))))
676 (defun fortran-abbrev-help ()
677 "List the currently defined abbrevs in Fortran mode."
679 (message "Listing abbrev table...")
680 (display-buffer (fortran-prepare-abbrev-list-buffer))
681 (message "Listing abbrev table...done"))
683 (defun fortran-prepare-abbrev-list-buffer ()
685 (set-buffer (get-buffer-create "*Abbrevs*"))
687 (insert-abbrev-table-description 'fortran-mode-abbrev-table t
)
688 (goto-char (point-min))
689 (set-buffer-modified-p nil
)
691 (get-buffer-create "*Abbrevs*"))
693 (defun fortran-column-ruler ()
694 "Inserts a column ruler momentarily above current line, till next keystroke.
695 The ruler is defined by the value of `fortran-column-ruler-fixed' when in fixed
696 format mode, and `fortran-column-ruler-tab' when in TAB format mode.
697 The key typed is executed unless it is SPC."
699 (momentary-string-display
701 fortran-column-ruler-tab
702 fortran-column-ruler-fixed
)
705 (if (eq (window-start (selected-window))
706 (window-point (selected-window)))
707 (progn (forward-line) (point))
709 nil
"Type SPC or any command to erase ruler."))
711 (defun fortran-window-create ()
712 "Makes the window 72 columns wide.
713 See also `fortran-window-create-momentarily'."
715 (condition-case error
717 (let ((window-min-width 2))
718 (if (< (window-width) (frame-width))
719 (enlarge-window-horizontally (- (frame-width)
721 (split-window-horizontally 73)
723 (switch-to-buffer " fortran-window-extra" t
)
724 (select-window (previous-window))))
725 (error (message "No room for Fortran window.")
728 (defun fortran-window-create-momentarily (&optional arg
)
729 "Momentarily makes the window 72 columns wide.
730 Optional ARG non-nil and non-unity disables the momentary feature.
731 See also `fortran-window-create'."
735 (save-window-excursion
736 (if (not (equal (fortran-window-create) 'error
))
737 (progn (message "Type SPC to continue editing.")
738 (let ((char (read-event)))
739 (or (equal char
(string-to-char " "))
740 (setq unread-command-events
(list char
)))))))
741 (fortran-window-create)))
743 (defun fortran-split-line ()
744 "Break line at point and insert continuation marker and alignment."
746 (delete-horizontal-space)
747 (if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip
))
748 (insert "\n" comment-line-start
" ")
752 (insert-char (fortran-numerical-continuation-char) 1))
753 (insert "\n " fortran-continuation-string
)));Space after \n important
754 (fortran-indent-line)) ;when the cont string is C, c or *.
756 (defun fortran-numerical-continuation-char ()
757 "Return a digit for tab-digit style of continuation lines.
758 If, previous line is a tab-digit continuation line, returns that digit
759 plus one. Otherwise return 1. Zero not allowed."
762 (if (looking-at "\t[1-9]")
763 (+ ?
1 (%
(- (char-after (+ (point) 1)) ?
0) 9))
766 (defun delete-horizontal-regexp (chars)
767 "Delete all characters in CHARS around point.
768 CHARS is like the inside of a [...] in a regular expression
769 except that ] is never special and \ quotes ^, - or \."
771 (skip-chars-backward chars
)
772 (delete-region (point) (progn (skip-chars-forward chars
) (point))))
774 (defun fortran-electric-line-number (arg)
775 "Self insert, but if part of a Fortran line number indent it automatically.
776 Auto-indent does not happen if a numeric arg is used."
778 (if (or arg
(not fortran-electric-line-number
))
780 (self-insert-command (prefix-numeric-value arg
))
781 (self-insert-command 1))
782 (if (or (and (= 5 (current-column))
785 (looking-at " ")));In col 5 with only spaces to left.
786 (and (= (if indent-tabs-mode
787 fortran-minimum-statement-indent-tab
788 fortran-minimum-statement-indent-fixed
) (current-column))
791 (looking-at "\t"));In col 8 with a single tab to the left.
792 (not (or (eq last-command
'fortran-indent-line
)
794 'fortran-indent-new-line
))))
796 (re-search-backward "[^ \t0-9]"
800 t
)) ;not a line number
801 (looking-at "[0-9]") ;within a line number
803 (self-insert-command (prefix-numeric-value arg
))
804 (skip-chars-backward " \t")
805 (insert last-command-char
)
806 (fortran-indent-line))))
808 (defun beginning-of-fortran-subprogram ()
809 "Moves point to the beginning of the current Fortran subprogram."
811 (let ((case-fold-search t
))
812 (beginning-of-line -
1)
813 (re-search-backward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil
'move
)
814 (if (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")
817 (defun end-of-fortran-subprogram ()
818 "Moves point to the end of the current Fortran subprogram."
820 (let ((case-fold-search t
))
821 (beginning-of-line 2)
822 (re-search-forward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil
'move
)
823 (goto-char (match-beginning 0))
826 (defun mark-fortran-subprogram ()
827 "Put mark at end of Fortran subprogram, point at beginning.
828 The marks are pushed."
830 (end-of-fortran-subprogram)
832 (beginning-of-fortran-subprogram))
834 (defun fortran-previous-statement ()
835 "Moves point to beginning of the previous Fortran statement.
836 Returns `first-statement' if that statement is the first
837 non-comment Fortran statement in the file, and nil otherwise."
839 (let (not-first-statement continue-test
)
843 (not (looking-at comment-line-start-skip
))
845 (concat "[ \t]*" (regexp-quote fortran-continuation-string
)))
846 (or (looking-at " [^ 0\n]")
847 (looking-at "\t[1-9]")))))
848 (while (and (setq not-first-statement
(= (forward-line -
1) 0))
849 (or (looking-at comment-line-start-skip
)
850 (looking-at "[ \t]*$")
851 (looking-at " [^ 0\n]")
852 (looking-at "\t[1-9]")
853 (looking-at (concat "[ \t]*" comment-start-skip
)))))
854 (cond ((and continue-test
855 (not not-first-statement
))
856 (message "Incomplete continuation statement."))
858 (fortran-previous-statement))
859 ((not not-first-statement
)
862 (defun fortran-next-statement ()
863 "Moves point to beginning of the next Fortran statement.
864 Returns `last-statement' if that statement is the last
865 non-comment Fortran statement in the file, and nil otherwise."
867 (let (not-last-statement)
869 (while (and (setq not-last-statement
870 (and (= (forward-line 1) 0)
872 (or (looking-at comment-line-start-skip
)
873 (looking-at "[ \t]*$")
874 (looking-at " [^ 0\n]")
875 (looking-at "\t[1-9]")
876 (looking-at (concat "[ \t]*" comment-start-skip
)))))
877 (if (not not-last-statement
)
880 (defun fortran-blink-matching-if ()
881 ;; From a Fortran ENDIF statement, blink the matching IF statement.
882 (let ((top-of-window (window-start)) matching-if
883 (endif-point (point)) message
)
884 (if (save-excursion (beginning-of-line)
885 (skip-chars-forward " \t0-9")
886 (looking-at "end[ \t]*if\\b"))
888 (if (not (setq matching-if
(fortran-beginning-if)))
889 (setq message
"No matching if.")
890 (if (< matching-if top-of-window
)
892 (goto-char matching-if
)
897 (point) (progn (end-of-line) (point))))))))
899 (message "%s" message
)
900 (goto-char matching-if
)
902 (goto-char endif-point
))))))
904 (defun fortran-blink-matching-do ()
905 ;; From a Fortran ENDDO statement, blink on the matching DO or DO WHILE
906 ;; statement. This is basically copied from fortran-blink-matching-if.
907 (let ((top-of-window (window-start)) matching-do
908 (enddo-point (point)) message
)
909 (if (save-excursion (beginning-of-line)
910 (skip-chars-forward " \t0-9")
911 (looking-at "end[ \t]*do\\b"))
913 (if (not (setq matching-do
(fortran-beginning-do)))
914 (setq message
"No matching do.")
915 (if (< matching-do top-of-window
)
917 (goto-char matching-do
)
922 (point) (progn (end-of-line) (point))))))))
924 (message "%s" message
)
925 (goto-char matching-do
)
927 (goto-char enddo-point
))))))
929 (defun fortran-mark-do ()
930 "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
931 The marks are pushed."
933 (let (enddo-point do-point
)
934 (if (setq enddo-point
(fortran-end-do))
935 (if (not (setq do-point
(fortran-beginning-do)))
936 (message "No matching do.")
937 ;; Set mark, move point.
938 (goto-char enddo-point
)
940 (goto-char do-point
)))))
942 (defun fortran-end-do ()
943 ;; Search forward for first unmatched ENDDO. Return point or nil.
944 (if (save-excursion (beginning-of-line)
945 (skip-chars-forward " \t0-9")
946 (looking-at "end[ \t]*do\\b"))
952 (while (and (not (= count
0))
953 (not (eq (fortran-next-statement) 'last-statement
))
954 ;; Keep local to subprogram
955 (not (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
957 (skip-chars-forward " \t0-9")
958 (cond ((looking-at "end[ \t]*do\\b")
959 (setq count
(- count
1)))
960 ((looking-at "do[ \t]+[^0-9]")
961 (setq count
(+ count
1)))))
963 ;; All pairs accounted for.
966 (defun fortran-beginning-do ()
967 ;; Search backwards for first unmatched DO [WHILE]. Return point or nil.
968 (if (save-excursion (beginning-of-line)
969 (skip-chars-forward " \t0-9")
970 (looking-at "do[ \t]+"))
976 (while (and (not (= count
0))
977 (not (eq (fortran-previous-statement) 'first-statement
))
978 ;; Keep local to subprogram
979 (not (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
981 (skip-chars-forward " \t0-9")
982 (cond ((looking-at "do[ \t]+[^0-9]")
983 (setq count
(- count
1)))
984 ((looking-at "end[ \t]*do\\b")
985 (setq count
(+ count
1)))))
988 ;; All pairs accounted for.
991 (defun fortran-mark-if ()
992 "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
993 The marks are pushed."
995 (let (endif-point if-point
)
996 (if (setq endif-point
(fortran-end-if))
997 (if (not (setq if-point
(fortran-beginning-if)))
998 (message "No matching if.")
999 ;; Set mark, move point.
1000 (goto-char endif-point
)
1002 (goto-char if-point
)))))
1004 (defun fortran-end-if ()
1005 ;; Search forwards for first unmatched ENDIF. Return point or nil.
1006 (if (save-excursion (beginning-of-line)
1007 (skip-chars-forward " \t0-9")
1008 (looking-at "end[ \t]*if\\b"))
1011 ;; Search for one. The point has been already been moved to first
1012 ;; letter on line but this should not cause troubles.
1015 (while (and (not (= count
0))
1016 (not (eq (fortran-next-statement) 'last-statement
))
1017 ;; Keep local to subprogram.
1019 "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
1021 (skip-chars-forward " \t0-9")
1022 (cond ((looking-at "end[ \t]*if\\b")
1023 (setq count
(- count
1)))
1025 ((looking-at "if[ \t]*(")
1028 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1029 (let (then-test) ; Multi-line if-then.
1031 (and (= (forward-line 1) 0)
1032 ;; Search forward for then.
1033 (or (looking-at " [^ 0\n]")
1034 (looking-at "\t[1-9]"))
1038 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1040 (setq count
(+ count
1)))))))
1043 ;; All pairs accounted for.
1046 (defun fortran-beginning-if ()
1047 ;; Search backwards for first unmatched IF-THEN. Return point or nil.
1049 ;; May be sitting on multi-line if-then statement, first move to
1050 ;; beginning of current statement. Note: `fortran-previous-statement'
1051 ;; moves to previous statement *unless* current statement is first
1052 ;; one. Only move forward if not first-statement.
1053 (if (not (eq (fortran-previous-statement) 'first-statement
))
1054 (fortran-next-statement))
1055 (skip-chars-forward " \t0-9")
1057 (looking-at "if[ \t]*(")
1059 (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1060 ;; Multi-line if-then.
1063 (and (= (forward-line 1) 0)
1064 ;; Search forward for then.
1065 (or (looking-at " [^ 0\n]")
1066 (looking-at "\t[1-9]"))
1070 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1077 (while (and (not (= count
0))
1078 (not (eq (fortran-previous-statement) 'first-statement
))
1079 ;; Keep local to subprogram.
1081 "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
1083 (skip-chars-forward " \t0-9")
1084 (cond ((looking-at "if[ \t]*(")
1087 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1088 (let (then-test) ; Multi-line if-then.
1090 (and (= (forward-line 1) 0)
1091 ;; Search forward for then.
1092 (or (looking-at " [^ 0\n]")
1093 (looking-at "\t[1-9]"))
1097 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1099 (setq count
(- count
1)))))
1100 ((looking-at "end[ \t]*if\\b")
1101 (setq count
(+ count
1)))))
1104 ;; All pairs accounted for.
1107 (defun fortran-indent-line ()
1108 "Indents current Fortran line based on its contents and on previous lines."
1110 (let ((cfi (calculate-fortran-indent)))
1113 (if (or (not (= cfi
(fortran-current-line-indentation)))
1114 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t
)
1115 (not (fortran-line-number-indented-correctly-p))))
1116 (fortran-indent-to-column cfi
)
1118 (if (and (not (looking-at comment-line-start-skip
))
1119 (fortran-find-comment-start-skip))
1120 (fortran-indent-comment))))
1121 ;; Never leave point in left margin.
1122 (if (< (current-column) cfi
)
1123 (move-to-column cfi
))
1124 (if (and auto-fill-function
1125 (> (save-excursion (end-of-line) (current-column)) fill-column
))
1129 (if fortran-blink-matching-if
1131 (fortran-blink-matching-if)
1132 (fortran-blink-matching-do)))))
1134 (defun fortran-indent-new-line ()
1135 "Reindent the current Fortran line, insert a newline and indent the newline.
1136 An abbrev before point is expanded if `abbrev-mode' is non-nil."
1138 (if abbrev-mode
(expand-abbrev))
1141 (skip-chars-forward " \t")
1142 (if (or (looking-at "[0-9]") ;Reindent only where it is most
1143 (looking-at "end") ;likely to be necessary
1145 (looking-at (regexp-quote fortran-continuation-string
)))
1146 (fortran-indent-line)))
1148 (fortran-indent-line))
1150 (defun fortran-indent-subprogram ()
1151 "Properly indents the Fortran subprogram which contains point."
1154 (mark-fortran-subprogram)
1155 (message "Indenting subprogram...")
1156 (indent-region (point) (mark) nil
))
1157 (message "Indenting subprogram...done."))
1159 (defun calculate-fortran-indent ()
1160 "Calculates the Fortran indent column based on previous lines."
1161 (let (icol first-statement
(case-fold-search t
)
1162 (fortran-minimum-statement-indent
1163 (if indent-tabs-mode
1164 fortran-minimum-statement-indent-tab
1165 fortran-minimum-statement-indent-fixed
)))
1167 (setq first-statement
(fortran-previous-statement))
1169 (setq icol fortran-minimum-statement-indent
)
1171 (if (= (point) (point-min))
1172 (setq icol fortran-minimum-statement-indent
)
1173 (setq icol
(fortran-current-line-indentation)))
1174 (skip-chars-forward " \t0-9")
1175 (cond ((looking-at "if[ \t]*(")
1176 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
1177 (let (then-test) ;multi-line if-then
1178 (while (and (= (forward-line 1) 0)
1179 ;;search forward for then
1180 (or (looking-at " [^ 0\n]")
1181 (looking-at "\t[1-9]"))
1182 (not (setq then-test
(looking-at
1184 *[^ \t_$(=a-z0-9]")))))
1186 (setq icol
(+ icol fortran-if-indent
))))
1187 ((looking-at "\\(else\\|elseif\\)\\b")
1188 (setq icol
(+ icol fortran-if-indent
)))
1189 ((looking-at "select[ \t]*case[ \t](.*)\\b")
1190 (setq icol
(+ icol fortran-if-indent
)))
1191 ((looking-at "case[ \t]*(.*)[ \t]*\n")
1192 (setq icol
(+ icol fortran-if-indent
)))
1193 ((looking-at "case[ \t]*default\\b")
1194 (setq icol
(+ icol fortran-if-indent
)))
1195 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1196 (setq icol
(+ icol fortran-if-indent
)))
1197 ((looking-at "where[ \t]*(.*)[ \t]*\n")
1198 (setq icol
(+ icol fortran-if-indent
)))
1199 ((looking-at "do\\b")
1200 (setq icol
(+ icol fortran-do-indent
)))
1202 "\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1203 (setq icol
(+ icol fortran-structure-indent
)))
1204 ((looking-at "end\\b[ \t]*[^ \t=(a-z]")
1205 ;; Previous END resets indent to minimum
1206 (setq icol fortran-minimum-statement-indent
))))))
1209 (cond ((looking-at "[ \t]*$"))
1210 ((looking-at comment-line-start-skip
)
1211 (cond ((eq fortran-comment-indent-style
'relative
)
1212 (setq icol
(+ icol fortran-comment-line-extra-indent
)))
1213 ((eq fortran-comment-indent-style
'fixed
)
1214 (setq icol
(+ fortran-minimum-statement-indent
1215 fortran-comment-line-extra-indent
))))
1216 (setq fortran-minimum-statement-indent
0))
1217 ((or (looking-at (concat "[ \t]*"
1219 fortran-continuation-string
)))
1220 (looking-at " [^ 0\n]")
1221 (looking-at "\t[1-9]"))
1222 (setq icol
(+ icol fortran-continuation-indent
)))
1223 ((looking-at "[ \t]*#") ; Check for cpp directive.
1224 (setq fortran-minimum-statement-indent
0 icol
0))
1226 ((and fortran-check-all-num-for-matching-do
1227 (looking-at "[ \t]*[0-9]+")
1228 (fortran-check-for-matching-do))
1229 (setq icol
(- icol fortran-do-indent
)))
1231 (skip-chars-forward " \t0-9")
1232 (cond ((looking-at "end[ \t]*if\\b")
1233 (setq icol
(- icol fortran-if-indent
)))
1234 ((looking-at "\\(else\\|elseif\\)\\b")
1235 (setq icol
(- icol fortran-if-indent
)))
1236 ((looking-at "case[ \t]*(.*)[ \t]*\n")
1237 (setq icol
(- icol fortran-if-indent
)))
1238 ((looking-at "case[ \t]*default\\b")
1239 (setq icol
(- icol fortran-if-indent
)))
1240 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1241 (setq icol
(- icol fortran-if-indent
)))
1242 ((looking-at "end[ \t]*where\\b")
1243 (setq icol
(- icol fortran-if-indent
)))
1244 ((and (looking-at "continue\\b")
1245 (fortran-check-for-matching-do))
1246 (setq icol
(- icol fortran-do-indent
)))
1247 ((looking-at "end[ \t]*do\\b")
1248 (setq icol
(- icol fortran-do-indent
)))
1251 \\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1252 (setq icol
(- icol fortran-structure-indent
)))
1254 "end[ \t]*select\\b[ \t]*[^ \t=(a-z]")
1255 (setq icol
(- icol fortran-if-indent
)))
1256 ((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
1257 (not (= icol fortran-minimum-statement-indent
)))
1258 (message "Warning: `end' not in column %d. Probably\
1259 an unclosed block." fortran-minimum-statement-indent
))))))
1260 (max fortran-minimum-statement-indent icol
)))
1262 (defun fortran-current-line-indentation ()
1263 "Indentation of current line, ignoring Fortran line number or continuation.
1264 This is the column position of the first non-whitespace character
1265 aside from the line number and/or column 5/8 line-continuation character.
1266 For comment lines, returns indentation of the first
1267 non-indentation text within the comment."
1270 (cond ((looking-at comment-line-start-skip
)
1271 (goto-char (match-end 0))
1273 (if (stringp fortran-comment-indent-char
)
1274 fortran-comment-indent-char
1275 (char-to-string fortran-comment-indent-char
))))
1276 ((or (looking-at " [^ 0\n]")
1277 (looking-at "\t[1-9]"))
1278 (goto-char (match-end 0)))
1280 ;; Move past line number.
1281 (skip-chars-forward "[ \t0-9]");From Uli
1283 ;; Move past whitespace.
1284 (skip-chars-forward " \t")
1287 (defun fortran-indent-to-column (col)
1288 "Indents current line with spaces to column COL.
1289 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
1290 line, and this continuation character is retained on indentation;
1291 2) If `fortran-continuation-string' is the first non-whitespace
1292 character, this is a continuation line;
1293 3) A non-continuation line which has a number as the first
1294 non-whitespace character is a numbered line.
1295 4) A TAB followed by a digit indicates a continuation line."
1298 (if (looking-at comment-line-start-skip
)
1299 (if fortran-comment-indent-style
1300 (let ((char (if (stringp fortran-comment-indent-char
)
1301 (aref fortran-comment-indent-char
0)
1302 fortran-comment-indent-char
)))
1303 (goto-char (match-end 0))
1304 (delete-horizontal-regexp (concat " \t" (char-to-string char
)))
1305 (insert-char char
(- col
(current-column)))))
1306 (if (looking-at "\t[1-9]")
1307 (if indent-tabs-mode
1308 (goto-char (match-end 0))
1311 (insert fortran-continuation-string
))
1312 (if (looking-at " [^ 0\n]")
1313 (if indent-tabs-mode
1314 (progn (delete-char 6)
1316 (insert-char (fortran-numerical-continuation-char) 1))
1318 (delete-horizontal-space)
1319 ;; Put line number in columns 0-4
1320 ;; or put continuation character in column 5.
1322 ((looking-at (regexp-quote fortran-continuation-string
))
1323 (if indent-tabs-mode
1326 (if indent-tabs-mode
1327 fortran-minimum-statement-indent-tab
1328 fortran-minimum-statement-indent-fixed
))
1330 (insert-char (fortran-numerical-continuation-char) 1))
1333 ((looking-at "[0-9]+")
1334 (let ((extra-space (- 5 (- (match-end 0) (point)))))
1335 (if (< extra-space
0)
1336 (message "Warning: line number exceeds 5-digit limit.")
1337 (indent-to (min fortran-line-number-indent extra-space
))))
1338 (skip-chars-forward "0-9")))))
1339 ;; Point is now after any continuation character or line number.
1340 ;; Put body of statement where specified.
1341 (delete-horizontal-space)
1343 ;; Indent any comment following code on the same line.
1344 (if (and comment-start-skip
1345 (fortran-find-comment-start-skip))
1346 (progn (goto-char (match-beginning 0))
1347 (if (not (= (current-column) (fortran-comment-hook)))
1348 (progn (delete-horizontal-space)
1349 (indent-to (fortran-comment-hook)))))))))
1351 (defun fortran-line-number-indented-correctly-p ()
1352 "Return t if current line's line number is correctly indented.
1353 Do not call if there is no line number."
1356 (skip-chars-forward " \t")
1357 (and (<= (current-column) fortran-line-number-indent
)
1358 (or (= (current-column) fortran-line-number-indent
)
1359 (progn (skip-chars-forward "0-9")
1360 (= (current-column) 5))))))
1362 (defun fortran-check-for-matching-do ()
1363 "When called from a numbered statement, returns t if matching DO is found.
1364 Otherwise return a nil."
1366 (case-fold-search t
))
1369 (if (looking-at "[ \t]*[0-9]+")
1371 (skip-chars-forward " \t")
1372 (skip-chars-forward "0") ;skip past leading zeros
1373 (setq charnum
(buffer-substring (point)
1374 (progn (skip-chars-forward "0-9")
1377 (and (re-search-backward
1378 (concat "\\(^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]\\)\\|"
1379 "\\(^[ \t0-9]*do[ \t]*0*" charnum
"\\b\\)\\|"
1380 "\\(^[ \t]*0*" charnum
"\\b\\)")
1382 (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum
))))))))
1384 (defun fortran-find-comment-start-skip ()
1385 "Move to past `comment-start-skip' found on current line.
1386 Return t if `comment-start-skip' found, nil if not."
1387 ;;; In order to move point only if comment-start-skip is found,
1388 ;;; this one uses a lot of save-excursions. Note that re-search-forward
1389 ;;; moves point even if comment-start-skip is inside a string-constant.
1390 ;;; Some code expects certain values for match-beginning and end
1393 (re-search-forward comment-start-skip
1394 (save-excursion (end-of-line) (point)) t
))
1395 (let ((save-match-beginning (match-beginning 0))
1396 (save-match-end (match-end 0)))
1397 (if (fortran-is-in-string-p (match-beginning 0))
1399 (goto-char save-match-end
)
1400 (fortran-find-comment-start-skip)) ; recurse for rest of line
1401 (goto-char save-match-beginning
)
1402 (re-search-forward comment-start-skip
1403 (save-excursion (end-of-line) (point)) t
)
1404 (goto-char (match-end 0))
1408 ;;;From: simon@gnu (Simon Marshall)
1409 ;;; Find the next ! not in a string.
1410 (defun fortran-match-!-comment
(limit)
1412 (while (and (setq found
(search-forward "!" limit t
))
1413 (fortran-is-in-string-p (point))))
1416 ;; Cheaper than `looking-at' "!.*".
1418 (list (1- (point)) (progn (end-of-line) (min (point) limit
))))
1421 ;; The above function is about 10% faster than the below...
1422 ;;(defun fortran-match-!-comment (limit)
1424 ;; (while (and (setq found (re-search-forward "!.*" limit t))
1425 ;; (fortran-is-in-string-p (match-beginning 0))))
1428 ;;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1429 ;;; Test if TAB format continuation lines work.
1430 (defun fortran-is-in-string-p (where)
1431 "Return non-nil if POS (a buffer position) is inside a Fortran string,
1436 ((bolp) nil
) ; bol is never inside a string
1437 ((save-excursion ; comment lines too
1438 (beginning-of-line)(looking-at comment-line-start-skip
)) nil
)
1439 (t (let (;; ok, serious now. Init some local vars:
1440 (parse-state '(0 nil nil nil nil nil
0))
1441 (quoted-comment-start (if comment-start
1442 (regexp-quote comment-start
)))
1447 ;; move to start of current statement
1448 (fortran-next-statement)
1449 (fortran-previous-statement)
1450 ;; now parse up to WHERE
1452 (if (or ;; skip to next line if:
1454 (looking-at comment-line-start-skip
)
1455 ;; - at end of line?
1457 ;; - not in a string and after comment-start?
1458 (and (not (nth 3 parse-state
))
1460 (equal comment-start
1461 (char-to-string (preceding-char)))))
1462 ;; get around a bug in forward-line in versions <= 18.57
1463 (if (or (> (forward-line 1) 0) (eobp))
1464 (setq not-done nil
))
1466 ;; if we are at beginning of code line, skip any
1467 ;; whitespace, labels and tab continuation markers.
1468 (if (bolp) (skip-chars-forward " \t0-9"))
1469 ;; if we are in column <= 5 now, check for continuation char
1470 (cond ((= 5 (current-column)) (forward-char 1))
1471 ((and (< (current-column) 5)
1472 (equal fortran-continuation-string
1473 (char-to-string (following-char)))
1475 ;; find out parse-limit from here
1476 (setq end-of-line
(save-excursion (end-of-line)(point)))
1477 (setq parse-limit
(min where end-of-line
))
1478 ;; parse max up to comment-start, if non-nil and in current line
1481 (if (re-search-forward quoted-comment-start end-of-line t
)
1482 (setq parse-limit
(min (point) parse-limit
)))))
1483 ;; now parse if still in limits
1484 (if (< (point) where
)
1485 (setq parse-state
(parse-partial-sexp
1486 (point) parse-limit nil nil parse-state
))
1487 (setq not-done nil
))
1490 (nth 3 parse-state
))))))
1492 (defun fortran-auto-fill-mode (arg)
1493 "Toggle fortran-auto-fill mode.
1494 With ARG, turn `fortran-auto-fill' mode on iff ARG is positive.
1495 In `fortran-auto-fill' mode, inserting a space at a column beyond `fill-column'
1496 automatically breaks the line at a previous space."
1498 (prog1 (setq auto-fill-function
1500 (not auto-fill-function
)
1501 (> (prefix-numeric-value arg
) 0))
1502 'fortran-do-auto-fill
1504 (force-mode-line-update)))
1506 (defun fortran-do-auto-fill ()
1507 (if (> (current-column) fill-column
)
1508 (fortran-indent-line)))
1510 (defun fortran-fill ()
1512 (let* ((opoint (point))
1513 (bol (save-excursion (beginning-of-line) (point)))
1514 (eol (save-excursion (end-of-line) (point)))
1515 (bos (min eol
(+ bol
(fortran-current-line-indentation))))
1519 (if (looking-at comment-line-start-skip
)
1520 nil
; OK to break quotes on comment lines.
1521 (move-to-column fill-column
)
1522 (cond ((fortran-is-in-string-p (point))
1523 (save-excursion (re-search-backward "[^']'[^']" bol t
)
1524 (if fortran-break-before-delimiters
1529 ;; decide where to split the line. If a position for a quoted
1530 ;; string was found above then use that, else break the line
1531 ;; before the last delimiter.
1532 ;; Delimiters are whitespace, commas, and operators.
1533 ;; Will break before a pair of *'s.
1538 (move-to-column (1+ fill-column
))
1539 (skip-chars-backward "^ \t\n,'+-/*=)"
1540 ;;; (if fortran-break-before-delimiters
1541 ;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
1543 (if (<= (point) (1+ bos
))
1545 (move-to-column (1+ fill-column
))
1546 ;;;what is this doing???
1547 (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t
))
1550 (re-search-forward "[ \t]" opoint t
)
1552 (if (looking-at "'")
1554 (skip-chars-backward " \t\*")))
1555 (if fortran-break-before-delimiters
1559 ;; if we are in an in-line comment, don't break unless the
1560 ;; line of code is longer than it should be. Otherwise
1561 ;; break the line at the column computed above.
1563 ;; Need to use fortran-find-comment-start-skip to make sure that quoted !'s
1564 ;; don't prevent a break.
1565 (if (not (or (save-excursion
1566 (if (and (re-search-backward comment-start-skip bol t
)
1567 (not (fortran-is-in-string-p (point))))
1569 (skip-chars-backward " \t")
1570 (< (current-column) (1+ fill-column
)))))
1572 (goto-char fill-point
)
1574 (if (> (save-excursion
1575 (goto-char fill-point
) (current-column))
1577 (progn (goto-char fill-point
)
1578 (fortran-break-line))
1580 (if (> (save-excursion
1581 (goto-char fill-point
)
1583 (+ (calculate-fortran-indent) fortran-continuation-indent
))
1585 (goto-char fill-point
)
1586 (fortran-break-line))))))
1588 (defun fortran-break-line ()
1589 (let ((opoint (point))
1590 (bol (save-excursion (beginning-of-line) (point)))
1591 (eol (save-excursion (end-of-line) (point)))
1592 (comment-string nil
))
1595 (if (and comment-start-skip
(fortran-find-comment-start-skip))
1597 (re-search-backward comment-start-skip bol t
)
1598 (setq comment-string
(buffer-substring (point) eol
))
1599 (delete-region (point) eol
))))
1600 ;;; Forward line 1 really needs to go to next non white line
1601 (if (save-excursion (forward-line 1)
1602 (or (looking-at " [^ 0\n]")
1603 (looking-at "\t[1-9]")))
1606 (delete-region (point) (match-end 0))
1607 (delete-horizontal-space)
1609 (fortran-split-line))
1614 (delete-horizontal-space)
1615 (indent-to (fortran-comment-hook))
1616 (insert comment-string
)))))
1618 (defun fortran-analyze-file-format ()
1619 "Returns nil if fixed format is used, t if TAB formatting is used.
1620 Use `fortran-tab-mode-default' if no non-comment statements are found in the
1621 file before the end or the first `fortran-analyze-depth' lines."
1624 (goto-char (point-min))
1630 (> i fortran-analyze-depth
)))
1634 ((looking-at "\t") t
)
1635 ((looking-at " ") nil
)
1636 (fortran-tab-mode-default t
)
1639 (or (assq 'fortran-tab-mode-string minor-mode-alist
)
1640 (setq minor-mode-alist
(cons
1641 '(fortran-tab-mode-string
1642 (indent-tabs-mode fortran-tab-mode-string
))
1647 ;;; fortran.el ends here