1 ;;; fortran.el --- Fortran mode for GNU Emacs
3 ;; Copyright (c) 1986, 93, 94, 95, 97, 98, 99, 2000 Free Software Foundation, Inc.
5 ;; Author: Michael D. Prange <prange@erl.mit.edu>
6 ;; Maintainer: Dave Love <fx@gnu.org>
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; This mode is documented in the Emacs manual.
30 ;; Note that it is for editing Fortran77 or Fortran90 fixed source
31 ;; form. For editing Fortran 90 free format source, use `f90-mode'
36 ;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
38 ;; We acknowledge many contributions and valuable suggestions by
39 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
40 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
41 ;; Gary Sabot and Richard Stallman.
48 ;; * Implement insertion and removal of statement continuations in
49 ;; mixed f77/f90 style, with the first `&' past column 72 and the
50 ;; second in column 6.
51 ;; * Support any other extensions to f77 grokked by GNU Fortran.
56 "Fortran mode for Emacs"
57 :link
'(custom-manual "(emacs)Fortran")
60 (defgroup fortran-indent nil
61 "Indentation variables in Fortran mode"
65 (defgroup fortran-comment nil
66 "Comment-handling variables in Fortran mode"
72 (defcustom fortran-tab-mode-default nil
73 "*Default tabbing/carriage control style for empty files in Fortran mode.
74 A value of t specifies tab-digit style of continuation control.
75 A value of nil specifies that continuation lines are marked
76 with a character in column 6."
78 :group
'fortran-indent
)
80 ;; Buffer local, used to display mode line.
81 (defcustom fortran-tab-mode-string nil
82 "String to appear in mode line when TAB format mode is on."
83 :type
'(choice (const nil
) string
)
84 :group
'fortran-indent
)
85 (make-variable-buffer-local 'fortran-tab-mode-string
)
87 (defcustom fortran-do-indent
3
88 "*Extra indentation applied to DO blocks."
90 :group
'fortran-indent
)
92 (defcustom fortran-if-indent
3
93 "*Extra indentation applied to IF blocks."
95 :group
'fortran-indent
)
97 (defcustom fortran-structure-indent
3
98 "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
100 :group
'fortran-indent
)
102 (defcustom fortran-continuation-indent
5
103 "*Extra indentation applied to Fortran continuation lines."
105 :group
'fortran-indent
)
107 (defcustom fortran-comment-indent-style
'fixed
108 "*How to indent comments.
109 nil forces comment lines not to be touched,
110 'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
111 columns beyond `fortran-minimum-statement-indent-fixed' (for
112 `indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
113 `indent-tabs-mode' of t), and 'relative indents to current
114 Fortran indentation plus `fortran-comment-line-extra-indent'."
115 :type
'(radio (const :tag
"Untouched" nil
) (const fixed
) (const relative
))
116 :group
'fortran-indent
)
118 (defcustom fortran-comment-line-extra-indent
0
119 "*Amount of extra indentation for text within full-line comments."
121 :group
'fortran-indent
122 :group
'fortran-comment
)
124 (defcustom fortran-comment-line-start
"C"
125 "*Delimiter inserted to start new full-line comment.
126 You might want to change this to \"*\", for instance."
129 :group
'fortran-comment
)
131 ;; This used to match preprocessor lines too, but that messes up
132 ;; filling and doesn't seem to be necessary.
133 (defcustom fortran-comment-line-start-skip
134 "^[CcDd*!]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*"
135 "*Regexp to match the start of a full-line comment."
138 :group
'fortran-comment
)
140 (defcustom fortran-minimum-statement-indent-fixed
6
141 "*Minimum statement indentation for fixed format continuation style."
143 :group
'fortran-indent
)
145 (defcustom fortran-minimum-statement-indent-tab
(max tab-width
6)
146 "*Minimum statement indentation for TAB format continuation style."
148 :group
'fortran-indent
)
150 ;; Note that this is documented in the v18 manuals as being a string
151 ;; of length one rather than a single character.
152 ;; The code in this file accepts either format for compatibility.
153 (defcustom fortran-comment-indent-char
" "
154 "*Single-character string inserted for Fortran comment indentation.
157 :group
'fortran-comment
)
159 (defcustom fortran-line-number-indent
1
160 "*Maximum indentation for Fortran line numbers.
161 5 means right-justify them within their five-column field."
163 :group
'fortran-indent
)
165 (defcustom fortran-check-all-num-for-matching-do nil
166 "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
170 (defcustom fortran-blink-matching-if nil
171 "*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
172 Also, from an ENDDO statement blink on matching DO [WHILE] statement."
176 (defcustom fortran-continuation-string
"$"
177 "*Single-character string used for Fortran continuation lines.
178 In fixed format continuation style, this character is inserted in
179 column 6 by \\[fortran-split-line] to begin a continuation line.
180 Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
181 convert the line into a continuation line of the appropriate style.
186 (defcustom fortran-comment-region
"c$$$"
187 "*String inserted by \\[fortran-comment-region] at start of each \
190 :group
'fortran-comment
)
192 (defcustom fortran-electric-line-number t
193 "*Non-nil causes line number digits to be moved to the correct \
198 (defvar fortran-column-ruler-fixed
199 "0 4 6 10 20 30 40 5\
201 \[ ]|{ | | | | | | | | \
203 "String displayed above current line by \\[fortran-column-ruler].
204 This variable used in fixed format mode.")
206 (defvar fortran-column-ruler-tab
209 \[ ]| { | | | | | | | | \
211 "String displayed above current line by \\[fortran-column-ruler].
212 This variable used in TAB format mode.")
214 (defvar fortran-mode-syntax-table nil
215 "Syntax table in use in Fortran mode buffers.")
217 (defvar fortran-analyze-depth
100
218 "Number of lines to scan to determine whether to use fixed or TAB \
221 (defcustom fortran-break-before-delimiters t
222 "*Non-nil causes filling to break lines before delimiters."
226 (if fortran-mode-syntax-table
228 (setq fortran-mode-syntax-table
(make-syntax-table))
229 ;; We might like `;' to be punctuation (g77 multi-statement lines),
230 ;; but that screws abbrevs.
231 (modify-syntax-entry ?\
; "w" fortran-mode-syntax-table)
232 (modify-syntax-entry ?
\r " " 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 ?
/ "." fortran-mode-syntax-table
)
238 (modify-syntax-entry ?
\' "\"" fortran-mode-syntax-table
)
239 (modify-syntax-entry ?
\" "\"" fortran-mode-syntax-table
)
240 (modify-syntax-entry ?
\\ "\\" fortran-mode-syntax-table
)
241 ;; This might be better as punctuation, as for C, but this way you
242 ;; can treat floating-point numbers as symbols.
243 (modify-syntax-entry ?.
"_" fortran-mode-syntax-table
) ; e.g. `a.ne.b'
244 (modify-syntax-entry ?_
"_" fortran-mode-syntax-table
)
245 (modify-syntax-entry ?$
"_" fortran-mode-syntax-table
) ; esp. VMSisms
246 (modify-syntax-entry ?\
! "<" fortran-mode-syntax-table
)
247 (modify-syntax-entry ?
\n ">" fortran-mode-syntax-table
))
249 ;; Comments are real pain in Fortran because there is no way to
250 ;; represent the standard comment syntax in an Emacs syntax table.
251 ;; (We can do so for F90-style). Therefore an unmatched quote in a
252 ;; standard comment will throw fontification off on the wrong track.
253 ;; So we do syntactic fontification with regexps.
255 ;; Regexps done by simon@gnu with help from Ulrik Dickow <dickow@nbi.dk> and
256 ;; probably others Si's forgotten about (sorry).
258 (defconst fortran-font-lock-keywords-1 nil
259 "Subdued level highlighting for Fortran mode.")
261 (defconst fortran-font-lock-keywords-2 nil
262 "Medium level highlighting for Fortran mode.")
264 (defconst fortran-font-lock-keywords-3 nil
265 "Gaudy level highlighting for Fortran mode.")
267 (defconst fortran-font-lock-syntactic-keywords nil
268 "`font-lock-syntactic-keywords' for Fortran.
269 These get fixed-format comments fontified.")
271 (let ((comment-chars "cd\\*") ; `d' for `debugging' comments
274 (let ((re (regexp-opt
276 '("character" "byte" "integer" "logical"
277 "none" "real" "complex"
278 "double precision" "double complex"))
279 (structured-types '("structure" "union" "map"))
280 (other-types '("record" "dimension"
281 "parameter" "common" "save"
282 "external" "intrinsic" "data"
285 (mapcar (lambda (x) (concat "implicit " x
))
288 (mapcar (lambda (x) (concat "end " x
))
292 ;; In the optimized regexp above, replace spaces by regexp
293 ;; for optional whitespace, which regexp-opt would have
295 (mapconcat #'identity
(split-string re
) "[ \t]*"))))
298 (regexp-opt '("continue" "format" "end" "enddo" "if" "then"
299 "else" "endif" "elseif" "while" "inquire" "stop"
300 "return" "include" "open" "close" "read" "write"
301 "format" "print" "select" "case" "cycle" "exit"))))
304 (regexp-opt '("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne"
306 (setq fortran-font-lock-syntactic-keywords
307 ;; Fixed format comments. (!-style handled normally.)
309 (list (concat "^[" comment-chars
"]") 0 '(11))
310 (list (concat "^[^" comment-chars
"\t\n]" (make-string 71 ?.
)
313 (setq fortran-font-lock-keywords-1
315 ;; Program, subroutine and function declarations, plus calls.
316 (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
317 "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
318 '(1 font-lock-keyword-face
)
319 '(2 font-lock-function-name-face nil t
))))
320 (setq fortran-font-lock-keywords-2
321 (append fortran-font-lock-keywords-1
323 ;; Fontify all type specifiers (must be first; see below).
324 (cons (concat "\\<\\(" fortran-type-types
"\\)\\>")
325 'font-lock-type-face
)
326 ;; Fontify all builtin keywords (except logical, do
327 ;; and goto; see below).
328 (concat "\\<\\(" fortran-keywords
"\\)\\>")
329 ;; Fontify all builtin operators.
330 (concat "\\.\\(" fortran-logicals
"\\)\\.")
331 ;; Fontify do/goto keywords and targets, and goto tags.
332 (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
333 '(1 font-lock-keyword-face
)
334 '(2 font-lock-constant-face nil t
))
335 (cons "^ *\\([0-9]+\\)" 'font-lock-constant-face
))))
336 (setq fortran-font-lock-keywords-3
338 ;; The list `fortran-font-lock-keywords-1'.
339 fortran-font-lock-keywords-1
340 ;; Fontify all type specifiers plus their declared items.
342 (list (concat "\\<\\(" fortran-type-types
"\\)\\>[ \t(/]*\\(*\\)?")
343 ;; Fontify the type specifier.
344 '(1 font-lock-type-face
)
345 ;; Fontify each declaration item (or just the /.../ block name).
346 `(font-lock-match-c-style-declaration-item-and-skip-to-next
347 ;; Start after any *(...) expression.
349 (and (and (match-beginning ,(+ 2 (regexp-opt-depth
350 fortran-type-types
)))
354 ;; No need to clean up.
356 ;; Fontify as a variable name, functions are
357 ;; fontified elsewhere.
358 (1 font-lock-variable-name-face nil t
))))
359 ;; Things extra to `fortran-font-lock-keywords-3'
360 ;; (must be done first).
362 ;; Fontify goto-like `err=label'/`end=label' in read/write
364 '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
365 (1 font-lock-keyword-face
) (4 font-lock-constant-face nil t
))
366 ;; Highlight standard continuation character and in a
367 ;; TAB-formatted line.
368 '("^ \\([^ 0]\\)" 1 font-lock-string-face
)
369 '("^\t\\([1-9]\\)" 1 font-lock-string-face
))
372 '("^# *[a-z]+" . font-lock-keyword-face
))
373 ;; The list `fortran-font-lock-keywords-2' less that for types
375 (cdr (nthcdr (length fortran-font-lock-keywords-1
)
376 fortran-font-lock-keywords-2
)))))
378 (defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
379 "Default expressions to highlight in Fortran mode.")
381 (defvar fortran-imenu-generic-expression
382 ;; These patterns could be confused by sequence nos. in cols 72+ and
383 ;; don't allow continuations everywhere.
387 ;; Lines below are: 1. leading whitespace; 2. function
388 ;; declaration with optional type, e.g. `real', `real*4',
389 ;; character(*), `double precision' and possible statement
390 ;; continuation; 3. untyped declarations; 4. the variable to
391 ;; index. [This will be fooled by `end function' allowed by G77.
392 ;; Also, it assumes sensible whitespace is employed.]
394 \\(\\sw\\|\\s-\\|[*()+]\\)*\
395 \\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)\
396 [ \t" fortran-continuation-string
"]+\
399 ;; Un-named block data
400 (list nil
"^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
401 "Imenu generic expression for `imenu-default-create-index-function'.")
403 (defvar fortran-mode-map
404 (let ((fortran-mode-map (make-sparse-keymap)))
405 (define-key fortran-mode-map
";" 'fortran-abbrev-start
)
406 (define-key fortran-mode-map
"\C-c;" 'fortran-comment-region
)
407 (define-key fortran-mode-map
"\M-;" 'fortran-indent-comment
)
408 (define-key fortran-mode-map
"\M-\n" 'fortran-split-line
)
409 (define-key fortran-mode-map
"\M-\C-q" 'fortran-indent-subprogram
)
410 (define-key fortran-mode-map
"\C-c\C-w" 'fortran-window-create-momentarily
)
411 (define-key fortran-mode-map
"\C-c\C-r" 'fortran-column-ruler
)
412 (define-key fortran-mode-map
"\C-c\C-p" 'fortran-previous-statement
)
413 (define-key fortran-mode-map
"\C-c\C-n" 'fortran-next-statement
)
414 (define-key fortran-mode-map
"\C-c\C-d" 'fortran-join-line
) ; like f90
415 (define-key fortran-mode-map
"\M-^" 'fortran-join-line
) ; subvert delete-indentation
416 (define-key fortran-mode-map
"0" 'fortran-electric-line-number
)
417 (define-key fortran-mode-map
"1" 'fortran-electric-line-number
)
418 (define-key fortran-mode-map
"2" 'fortran-electric-line-number
)
419 (define-key fortran-mode-map
"3" 'fortran-electric-line-number
)
420 (define-key fortran-mode-map
"4" 'fortran-electric-line-number
)
421 (define-key fortran-mode-map
"5" 'fortran-electric-line-number
)
422 (define-key fortran-mode-map
"6" 'fortran-electric-line-number
)
423 (define-key fortran-mode-map
"7" 'fortran-electric-line-number
)
424 (define-key fortran-mode-map
"8" 'fortran-electric-line-number
)
425 (define-key fortran-mode-map
"9" 'fortran-electric-line-number
)
428 (unless (boundp 'fortran-mode-menu
)
430 fortran-mode-menu fortran-mode-map
""
432 ["Manual" (info "(emacs)Fortran")]
433 ;;; This loads cus-edit as things stand -- needs to be done lazily.
434 ;;; ,(customize-menu-create 'fortran)
435 ;;; ["Set" Custom-set t]
436 ;;; ["Save" Custom-save t]
437 ;;; ["Reset to Current" Custom-reset-current t]
438 ;;; ["Reset to Saved" Custom-reset-saved t]
439 ;;; ["Reset to Standard Settings" Custom-reset-standard t]
441 ["Toggle Auto-fill" fortran-auto-fill-mode
:style toggle
442 :selected
(eq auto-fill-function
'fortran-do-auto-fill
)]
443 ["Toggle abbrev-mode" abbrev-mode
:style toggle
:selected abbrev-mode
]
445 ["Comment-out Region" fortran-comment-region mark-active
]
446 ["Uncomment-out region"
447 (fortran-comment-region (region-beginning) (region-end) 1)
449 ["Indent Region" indent-region mark-active
]
450 ["Indent Subprogram" fortran-indent-subprogram t
]
452 ["Beginning of Subprogram" fortran-beginning-of-subprogram t
]
453 ["End of Subprogram" fortran-end-of-subprogram t
]
455 ["Subprogram" mark-defun
t]
456 ["IF Block" fortran-mark-if t
]
457 ["DO Block" fortran-mark-do t
])
458 ["Narrow to Subprogram" narrow-to-defun
t]
461 ["Temporary column ruler" fortran-column-ruler t
]
462 ["72-column window" fortran-window-create t
]
464 (enlarge-window-horizontally (- (frame-width) (window-width)))
465 (< (window-width) (frame-width))]
466 ["Momentary 72-column window" fortran-window-create-momentarily t
]
468 ["Break Line at Point" fortran-split-line t
]
469 ["Join Line" fortran-join-line t
]
470 ["Fill Statement/Comment" fill-paragraph t
]
473 imenu-add-menubar-index
(not (and (boundp 'imenu--index-alist
)
474 imenu--index-alist
))])))
476 "Keymap used in Fortran mode.")
478 (defvar fortran-mode-abbrev-table
479 (let ((ac abbrevs-changed
))
480 (define-abbrev-table 'fortran-mode-abbrev-table
())
481 (define-abbrev fortran-mode-abbrev-table
";au" "automatic" nil
)
482 (define-abbrev fortran-mode-abbrev-table
";b" "byte" nil
)
483 (define-abbrev fortran-mode-abbrev-table
";bd" "block data" nil
)
484 (define-abbrev fortran-mode-abbrev-table
";ch" "character" nil
)
485 (define-abbrev fortran-mode-abbrev-table
";cl" "close" nil
)
486 (define-abbrev fortran-mode-abbrev-table
";c" "continue" nil
)
487 (define-abbrev fortran-mode-abbrev-table
";cm" "common" nil
)
488 (define-abbrev fortran-mode-abbrev-table
";cx" "complex" nil
)
489 (define-abbrev fortran-mode-abbrev-table
";df" "define" nil
)
490 (define-abbrev fortran-mode-abbrev-table
";di" "dimension" nil
)
491 (define-abbrev fortran-mode-abbrev-table
";do" "double" nil
)
492 (define-abbrev fortran-mode-abbrev-table
";dc" "double complex" nil
)
493 (define-abbrev fortran-mode-abbrev-table
";dp" "double precision" nil
)
494 (define-abbrev fortran-mode-abbrev-table
";dw" "do while" nil
)
495 (define-abbrev fortran-mode-abbrev-table
";e" "else" nil
)
496 (define-abbrev fortran-mode-abbrev-table
";ed" "enddo" nil
)
497 (define-abbrev fortran-mode-abbrev-table
";el" "elseif" nil
)
498 (define-abbrev fortran-mode-abbrev-table
";en" "endif" nil
)
499 (define-abbrev fortran-mode-abbrev-table
";eq" "equivalence" nil
)
500 (define-abbrev fortran-mode-abbrev-table
";ew" "endwhere" nil
)
501 (define-abbrev fortran-mode-abbrev-table
";ex" "external" nil
)
502 (define-abbrev fortran-mode-abbrev-table
";ey" "entry" nil
)
503 (define-abbrev fortran-mode-abbrev-table
";f" "format" nil
)
504 (define-abbrev fortran-mode-abbrev-table
";fa" ".false." nil
)
505 (define-abbrev fortran-mode-abbrev-table
";fu" "function" nil
)
506 (define-abbrev fortran-mode-abbrev-table
";g" "goto" nil
)
507 (define-abbrev fortran-mode-abbrev-table
";im" "implicit" nil
)
508 (define-abbrev fortran-mode-abbrev-table
";ib" "implicit byte" nil
)
509 (define-abbrev fortran-mode-abbrev-table
";ic" "implicit complex" nil
)
510 (define-abbrev fortran-mode-abbrev-table
";ich" "implicit character" nil
)
511 (define-abbrev fortran-mode-abbrev-table
";ii" "implicit integer" nil
)
512 (define-abbrev fortran-mode-abbrev-table
";il" "implicit logical" nil
)
513 (define-abbrev fortran-mode-abbrev-table
";ir" "implicit real" nil
)
514 (define-abbrev fortran-mode-abbrev-table
";inc" "include" nil
)
515 (define-abbrev fortran-mode-abbrev-table
";in" "integer" nil
)
516 (define-abbrev fortran-mode-abbrev-table
";intr" "intrinsic" nil
)
517 (define-abbrev fortran-mode-abbrev-table
";l" "logical" nil
)
518 (define-abbrev fortran-mode-abbrev-table
";n" "namelist" nil
)
519 (define-abbrev fortran-mode-abbrev-table
";o" "open" nil
) ; was ;op
520 (define-abbrev fortran-mode-abbrev-table
";pa" "parameter" nil
)
521 (define-abbrev fortran-mode-abbrev-table
";pr" "program" nil
)
522 (define-abbrev fortran-mode-abbrev-table
";ps" "pause" nil
)
523 (define-abbrev fortran-mode-abbrev-table
";p" "print" nil
)
524 (define-abbrev fortran-mode-abbrev-table
";rc" "record" nil
)
525 (define-abbrev fortran-mode-abbrev-table
";re" "real" nil
)
526 (define-abbrev fortran-mode-abbrev-table
";r" "read" nil
)
527 (define-abbrev fortran-mode-abbrev-table
";rt" "return" nil
)
528 (define-abbrev fortran-mode-abbrev-table
";rw" "rewind" nil
)
529 (define-abbrev fortran-mode-abbrev-table
";s" "stop" nil
)
530 (define-abbrev fortran-mode-abbrev-table
";sa" "save" nil
)
531 (define-abbrev fortran-mode-abbrev-table
";st" "structure" nil
)
532 (define-abbrev fortran-mode-abbrev-table
";sc" "static" nil
)
533 (define-abbrev fortran-mode-abbrev-table
";su" "subroutine" nil
)
534 (define-abbrev fortran-mode-abbrev-table
";tr" ".true." nil
)
535 (define-abbrev fortran-mode-abbrev-table
";ty" "type" nil
)
536 (define-abbrev fortran-mode-abbrev-table
";vo" "volatile" nil
)
537 (define-abbrev fortran-mode-abbrev-table
";w" "write" nil
)
538 (define-abbrev fortran-mode-abbrev-table
";wh" "where" nil
)
539 (setq abbrevs-changed ac
)
540 fortran-mode-abbrev-table
))
542 (eval-when-compile ; silence compiler
543 (defvar imenu-case-fold-search
)
544 (defvar imenu-syntax-alist
))
546 (defcustom fortran-mode-hook nil
547 "Hook run by Fortran mode."
552 (defun fortran-mode ()
553 "Major mode for editing Fortran code.
554 \\[fortran-indent-line] indents the current Fortran line correctly.
555 DO statements must not share a common CONTINUE.
557 Type ;? or ;\\[help-command] to display a list of built-in abbrevs for
563 Variables controlling indentation style and extra features:
566 Normally nil in Fortran mode. If you want to use comments
567 starting with `!', set this to the string \"!\".
569 Extra indentation within do blocks. (default 3)
571 Extra indentation within if blocks. (default 3)
572 `fortran-structure-indent'
573 Extra indentation within structure, union, map and interface blocks.
575 `fortran-continuation-indent'
576 Extra indentation applied to continuation statements. (default 5)
577 `fortran-comment-line-extra-indent'
578 Amount of extra indentation for text within full-line comments. (default 0)
579 `fortran-comment-indent-style'
580 nil means don't change indentation of text in full-line comments,
581 fixed means indent that text at `fortran-comment-line-extra-indent' beyond
582 the value of `fortran-minimum-statement-indent-fixed' (for fixed
583 format continuation style) or `fortran-minimum-statement-indent-tab'
584 (for TAB format continuation style).
585 relative means indent at `fortran-comment-line-extra-indent' beyond the
586 indentation for a line of code.
588 `fortran-comment-indent-char'
589 Single-character string to be inserted instead of space for
590 full-line comment indentation. (default \" \")
591 `fortran-minimum-statement-indent-fixed'
592 Minimum indentation for Fortran statements in fixed format mode. (def.6)
593 `fortran-minimum-statement-indent-tab'
594 Minimum indentation for Fortran statements in TAB format mode. (default 9)
595 `fortran-line-number-indent'
596 Maximum indentation for line numbers. A line number will get
597 less than this much indentation if necessary to avoid reaching
598 column 5. (default 1)
599 `fortran-check-all-num-for-matching-do'
600 Non-nil causes all numbered lines to be treated as possible \"continue\"
601 statements. (default nil)
602 `fortran-blink-matching-if'
603 Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
604 matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
605 statement. (default nil)
606 `fortran-continuation-string'
607 Single-character string to be inserted in column 5 of a continuation
608 line. (default \"$\")
609 `fortran-comment-region'
610 String inserted by \\[fortran-comment-region] at start of each line in
611 region. (default \"c$$$\")
612 `fortran-electric-line-number'
613 Non-nil causes line number digits to be moved to the correct column
614 as typed. (default t)
615 `fortran-break-before-delimiters'
616 Non-nil causes lines to be broken before delimiters.
619 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
620 with no args, if that value is non-nil."
622 (kill-all-local-variables)
623 (setq local-abbrev-table fortran-mode-abbrev-table
)
624 (set-syntax-table fortran-mode-syntax-table
)
625 ;; Font Lock mode support.
626 (make-local-variable 'font-lock-defaults
)
627 (setq font-lock-defaults
'((fortran-font-lock-keywords
628 fortran-font-lock-keywords-1
629 fortran-font-lock-keywords-2
630 fortran-font-lock-keywords-3
)
631 nil t
((?
/ .
"$/") ("_$" .
"w"))
632 fortran-beginning-of-subprogram
))
633 (set (make-local-variable 'font-lock-syntactic-keywords
)
634 fortran-font-lock-syntactic-keywords
)
635 (make-local-variable 'fortran-break-before-delimiters
)
636 (setq fortran-break-before-delimiters t
)
637 (make-local-variable 'indent-line-function
)
638 (setq indent-line-function
'fortran-indent-line
)
639 (make-local-variable 'comment-indent-function
)
640 (setq comment-indent-function
'fortran-comment-indent-function
)
641 (make-local-variable 'comment-start-skip
)
642 (setq comment-start-skip
"![ \t]*")
643 (make-local-variable 'comment-start
)
644 (setq comment-start
"C")
645 (make-local-variable 'require-final-newline
)
646 (setq require-final-newline t
)
647 (make-local-variable 'abbrev-all-caps
)
648 (setq abbrev-all-caps t
)
649 (make-local-variable 'indent-tabs-mode
)
650 (setq indent-tabs-mode nil
)
651 ;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
652 (set (make-local-variable 'fill-column
) 72)
653 (use-local-map fortran-mode-map
)
654 (setq mode-name
"Fortran")
655 (setq major-mode
'fortran-mode
)
656 (make-local-variable 'fortran-comment-line-extra-indent
)
657 (make-local-variable 'fortran-minimum-statement-indent-fixed
)
658 (make-local-variable 'fortran-minimum-statement-indent-tab
)
659 (make-local-variable 'fortran-column-ruler-fixed
)
660 (make-local-variable 'fortran-column-ruler-tab
)
661 (setq fortran-tab-mode-string
" TAB-format")
662 (setq indent-tabs-mode
(fortran-analyze-file-format))
663 (setq imenu-case-fold-search t
)
664 (setq imenu-generic-expression fortran-imenu-generic-expression
)
665 (setq imenu-syntax-alist
'(("_$" .
"w")))
666 (set (make-local-variable 'fill-paragraph-function
) 'fortran-fill-paragraph
)
667 (set (make-local-variable 'indent-line-function
) 'fortran-indent-line
)
668 (set (make-local-variable 'indent-region-function
)
670 (let (fortran-blink-matching-if ; avoid blinking delay
671 indent-region-function
)
672 (indent-region start end nil
))))
673 (set (make-local-variable 'beginning-of-defun-function
)
674 #'fortran-beginning-of-subprogram
)
675 (set (make-local-variable 'end-of-defun-function
)
676 #'fortran-end-of-subprogram
)
677 (set (make-local-variable 'add-log-current-defun-function
)
678 #'fortran-current-defun
)
679 (run-hooks 'fortran-mode-hook
))
681 (defun fortran-comment-indent-function ()
683 (skip-chars-backward " \t")
684 (max (+ 1 (current-column))
687 (defun fortran-indent-comment ()
688 "Align or create comment on current line.
689 Existing comments of all types are recognized and aligned.
690 If the line has no comment, a side-by-side comment is inserted and aligned
691 if the value of `comment-start' is not nil.
692 Otherwise, a separate-line comment is inserted, on this line
693 or on a new line inserted before this line if this line is not blank."
696 ;; Recognize existing comments of either kind.
697 (cond ((looking-at fortran-comment-line-start-skip
)
698 (fortran-indent-line))
699 ((fortran-find-comment-start-skip) ; catches any inline comment and
700 ; leaves point after comment-start-skip
701 (if comment-start-skip
702 (progn (goto-char (match-beginning 0))
703 (if (not (= (current-column) (fortran-comment-indent-function)))
704 (progn (delete-horizontal-space)
705 (indent-to (fortran-comment-indent-function)))))
706 (end-of-line))) ; otherwise goto end of line or sth else?
707 ;; No existing comment.
708 ;; If side-by-side comments are defined, insert one,
709 ;; unless line is now blank.
710 ((and comment-start
(not (looking-at "^[ \t]*$")))
712 (delete-horizontal-space)
713 (indent-to (fortran-comment-indent-function))
714 (insert comment-start
))
715 ;; Else insert separate-line comment, making a new line if nec.
717 (if (looking-at "^[ \t]*$")
718 (delete-horizontal-space)
722 (insert fortran-comment-line-start
)
723 (insert-char (if (stringp fortran-comment-indent-char
)
724 (aref fortran-comment-indent-char
0)
725 fortran-comment-indent-char
)
726 (- (fortran-calculate-indent) (current-column))))))
728 (defun fortran-comment-region (beg-region end-region arg
)
729 "Comments every line in the region.
730 Puts `fortran-comment-region' at the beginning of every line in the region.
731 BEG-REGION and END-REGION are args which specify the region boundaries.
732 With non-nil ARG, uncomments the region."
733 (interactive "*r\nP")
734 (let ((end-region-mark (make-marker)) (save-point (point-marker)))
735 (set-marker end-region-mark end-region
)
736 (goto-char beg-region
)
738 (if (not arg
) ;comment the region
739 (progn (insert fortran-comment-region
)
740 (while (and (= (forward-line 1) 0)
741 (< (point) end-region-mark
))
742 (insert fortran-comment-region
)))
743 (let ((com (regexp-quote fortran-comment-region
))) ;uncomment the region
745 (delete-region (point) (match-end 0)))
746 (while (and (= (forward-line 1) 0)
747 (< (point) end-region-mark
))
749 (delete-region (point) (match-end 0))))))
750 (goto-char save-point
)
751 (set-marker end-region-mark nil
)
752 (set-marker save-point nil
)))
754 (defun fortran-abbrev-start ()
755 "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
756 Any other key combination is executed normally."
759 (insert last-command-char
)
760 (if (or (eq (setq c
(read-event)) ??
) ;insert char if not equal to `?'
762 (fortran-abbrev-help)
763 (setq unread-command-events
(list c
)))))
765 (defun fortran-abbrev-help ()
766 "List the currently defined abbrevs in Fortran mode."
768 (message "Listing abbrev table...")
769 (display-buffer (fortran-prepare-abbrev-list-buffer))
770 (message "Listing abbrev table...done"))
772 (defun fortran-prepare-abbrev-list-buffer ()
774 (set-buffer (get-buffer-create "*Abbrevs*"))
776 (insert-abbrev-table-description 'fortran-mode-abbrev-table t
)
777 (goto-char (point-min))
778 (set-buffer-modified-p nil
)
780 (get-buffer-create "*Abbrevs*"))
782 (defun fortran-column-ruler ()
783 "Insert a column ruler momentarily above current line, till next keystroke.
784 The ruler is defined by the value of `fortran-column-ruler-fixed' when in fixed
785 format mode, and `fortran-column-ruler-tab' when in TAB format mode.
786 The key typed is executed unless it is SPC."
788 (momentary-string-display
790 fortran-column-ruler-tab
791 fortran-column-ruler-fixed
)
794 (if (eq (window-start (selected-window))
795 (window-point (selected-window)))
796 (line-beginning-position 2)
798 nil
"Type SPC or any command to erase ruler."))
800 (defun fortran-window-create ()
801 "Make the window 72 columns wide.
802 See also `fortran-window-create-momentarily'."
804 (condition-case error
806 (let ((window-min-width 2))
807 (if (< (window-width) (frame-width))
808 (enlarge-window-horizontally (- (frame-width)
810 (let* ((window-edges (window-edges))
811 (scroll-bar-width (- (nth 2 window-edges
)
814 (split-window-horizontally (+ 72 scroll-bar-width
)))
816 (switch-to-buffer " fortran-window-extra" t
)
817 (select-window (previous-window))))
818 (error (message "No room for Fortran window.")
821 (defun fortran-window-create-momentarily (&optional arg
)
822 "Momentarily make the window 72 columns wide.
823 Optional ARG non-nil and non-unity disables the momentary feature.
824 See also `fortran-window-create'."
828 (save-window-excursion
829 (if (not (equal (fortran-window-create) 'error
))
830 (progn (message "Type SPC to continue editing.")
831 (let ((char (read-event)))
832 (or (equal char
(string-to-char " "))
833 (setq unread-command-events
(list char
)))))))
834 (fortran-window-create)))
836 (defun fortran-split-line ()
837 "Break line at point and insert continuation marker and alignment."
839 (delete-horizontal-space)
842 (looking-at fortran-comment-line-start-skip
))
843 (insert ?
\n fortran-comment-line-start ?
)
845 (insert ?
\n ?
\t (fortran-numerical-continuation-char))
846 (insert "\n " fortran-continuation-string
))) ; Space after \n important
847 (fortran-indent-line)) ; when the cont string is C, c or *.
849 (defun fortran-remove-continuation ()
850 (if (looking-at "\\( [^ 0\n]\\|\t[1-9]\\|&\\)")
851 (progn (replace-match "")
855 (defun fortran-join-line (arg)
856 "Join current line to the previous one and re-indent.
857 With a prefix argument, repeat this operation that many times.
858 If the prefix argument ARG is negative, join the next -ARG lines.
859 Continuation lines are correctly handled."
865 (while (not (zerop arg
))
867 (or (fortran-remove-continuation)
868 (delete-indentation))
870 (fortran-indent-line)))
872 (defun fortran-numerical-continuation-char ()
873 "Return a digit for tab-digit style of continuation lines.
874 If, previous line is a tab-digit continuation line, returns that digit
875 plus one. Otherwise return 1. Zero not allowed."
878 (if (looking-at "\t[1-9]")
879 (+ ?
1 (%
(- (char-after (+ (point) 1)) ?
0) 9))
882 (put 'fortran-electric-line-number
'delete-selection t
)
883 (defun fortran-electric-line-number (arg)
884 "Self insert, but if part of a Fortran line number indent it automatically.
885 Auto-indent does not happen if a numeric ARG is used."
887 (if (or arg
(not fortran-electric-line-number
))
889 (self-insert-command (prefix-numeric-value arg
))
890 (self-insert-command 1))
891 (if (or (and (= 5 (current-column))
894 (looking-at " "))) ;In col 5 with only spaces to left.
895 (and (= (if indent-tabs-mode
896 fortran-minimum-statement-indent-tab
897 fortran-minimum-statement-indent-fixed
) (current-column))
898 (eq ?
\t (char-after (line-beginning-position))) ;In col 8
899 ; with a single tab to the left.
900 (not (or (eq last-command
'fortran-indent-line
)
902 'fortran-indent-new-line
))))
904 (re-search-backward "[^ \t0-9]"
905 (line-beginning-position)
906 t
)) ;not a line number
907 (looking-at "[0-9]")) ;within a line number
908 (self-insert-command (prefix-numeric-value arg
))
909 (skip-chars-backward " \t")
910 (insert last-command-char
)
911 (fortran-indent-line))))
913 (defvar fortran-end-prog-re1
915 \\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
916 \\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?")
917 (defvar fortran-end-prog-re
918 (concat "^[ \t0-9]*" fortran-end-prog-re1
)
919 "Regexp possibly marking subprogram end.")
921 (defun fortran-check-end-prog-re ()
922 "Check a preliminary match against `fortran-end-prog-re'."
923 ;; Having got a possible match for the subprogram end, we need a
924 ;; match of whitespace, avoiding possible column 73+ stuff.
926 (string-match "^\\s-*\\(\\'\\|\\s<\\)"
927 (buffer-substring (match-end 0)
928 (min (line-end-position)
929 (+ 72 (line-beginning-position)))))))
931 ;; Note that you can't just check backwards for `subroutine' &c in
932 ;; case of un-marked main programs not at the start of the file.
933 (defun fortran-beginning-of-subprogram ()
934 "Moves point to the beginning of the current Fortran subprogram."
937 (let ((case-fold-search t
))
938 (beginning-of-line -
1)
940 (while (re-search-backward fortran-end-prog-re nil
'move
)
941 (if (fortran-check-end-prog-re)
945 (defun fortran-end-of-subprogram ()
946 "Moves point to the end of the current Fortran subprogram."
949 (let ((case-fold-search t
))
950 (if (save-excursion ; on END
952 (and (looking-at fortran-end-prog-re
)
953 (fortran-check-end-prog-re)))
955 (beginning-of-line 2)
957 (while (re-search-forward fortran-end-prog-re nil
'move
)
958 (if (fortran-check-end-prog-re)
960 (goto-char (match-beginning 0))
963 (defun fortran-previous-statement ()
964 "Moves point to beginning of the previous Fortran statement.
965 Returns `first-statement' if that statement is the first
966 non-comment Fortran statement in the file, and nil otherwise."
968 (let (not-first-statement continue-test
)
972 (not (looking-at fortran-comment-line-start-skip
))
974 (concat "[ \t]*" (regexp-quote fortran-continuation-string
)))
975 (looking-at " [^ 0\n]\\|\t[1-9]"))))
976 (while (and (setq not-first-statement
(= (forward-line -
1) 0))
977 (or (looking-at fortran-comment-line-start-skip
)
978 (looking-at "[ \t]*$\\| [^ 0\n]\\|\t[1-9]")
979 (looking-at (concat "[ \t]*" comment-start-skip
)))))
980 (cond ((and continue-test
981 (not not-first-statement
))
982 (message "Incomplete continuation statement."))
984 (fortran-previous-statement))
985 ((not not-first-statement
)
988 (defun fortran-next-statement ()
989 "Moves point to beginning of the next Fortran statement.
990 Returns `last-statement' if that statement is the last
991 non-comment Fortran statement in the file, and nil otherwise."
993 (let (not-last-statement)
995 (while (and (setq not-last-statement
996 (and (= (forward-line 1) 0)
998 (or (looking-at fortran-comment-line-start-skip
)
999 (looking-at "[ \t]*$\\| [^ 0\n]\\|\t[1-9]")
1000 (looking-at (concat "[ \t]*" comment-start-skip
)))))
1001 (if (not not-last-statement
)
1004 (defun fortran-blink-match (regex keyword find-begin
)
1005 "From a line matching REGEX, blink matching KEYWORD statement line.
1006 Use function FIND-BEGIN to match it."
1007 (let ((top-of-window (window-start))
1009 (case-fold-search t
)
1014 (skip-chars-forward " \t0-9")
1017 (if (not (setq matching
(funcall find-begin
)))
1018 (setq message
(concat "No matching " keyword
"."))
1019 (if (< matching top-of-window
)
1021 (goto-char matching
)
1025 (buffer-substring (point)
1026 (line-end-position)))))))
1028 (message "%s" message
)
1029 (goto-char matching
)
1031 (goto-char end-point
))))))
1033 (defun fortran-blink-matching-if ()
1034 "From an ENDIF or ELSE statement, blink the matching IF statement."
1035 (fortran-blink-match "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"
1036 "if" #'fortran-beginning-if
))
1038 (defun fortran-blink-matching-do ()
1039 "From an ENDDO statement, blink the matching DO or DO WHILE statement."
1040 (fortran-blink-match "end[ \t]*do\\b" "do" #'fortran-beginning-do
))
1042 (defun fortran-mark-do ()
1043 "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
1044 The marks are pushed."
1046 (let (enddo-point do-point
)
1047 (if (setq enddo-point
(fortran-end-do))
1048 (if (not (setq do-point
(fortran-beginning-do)))
1049 (message "No matching do.")
1050 (goto-char enddo-point
)
1052 (goto-char do-point
)))))
1054 (defun fortran-end-do ()
1055 "Search forward for first unmatched ENDDO.
1056 Return point or nil."
1057 (let ((case-fold-search t
))
1058 (if (save-excursion (beginning-of-line)
1059 (skip-chars-forward " \t0-9")
1060 (looking-at "end[ \t]*do\\b"))
1066 (while (and (not (= count
0))
1067 (not (eq (fortran-next-statement) 'last-statement
))
1068 ;; Keep local to subprogram
1069 (not (and (looking-at fortran-end-prog-re
)
1070 (fortran-check-end-prog-re))))
1071 (skip-chars-forward " \t0-9")
1072 (cond ((looking-at "end[ \t]*do\\b")
1073 (setq count
(1- count
)))
1075 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
1076 (setq count
(+ count
1)))))
1078 ;; All pairs accounted for.
1081 (defun fortran-beginning-do ()
1082 "Search backwards for first unmatched DO [WHILE].
1083 Return point or nil."
1084 (let ((case-fold-search t
))
1087 (skip-chars-forward " \t0-9")
1088 (looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+"))
1094 (while (and (not (= count
0))
1095 (not (eq (fortran-previous-statement) 'first-statement
))
1096 ;; Keep local to subprogram
1097 (not (and (looking-at fortran-end-prog-re
)
1098 (fortran-check-end-prog-re))))
1099 (skip-chars-forward " \t0-9")
1101 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
1102 (setq count
(1- count
)))
1103 ((looking-at "end[ \t]*do\\b")
1104 (setq count
(1+ count
)))))
1106 ;; All pairs accounted for.
1109 (defun fortran-mark-if ()
1110 "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
1111 The marks are pushed."
1113 (let (endif-point if-point
)
1114 (if (setq endif-point
(fortran-end-if))
1115 (if (not (setq if-point
(fortran-beginning-if)))
1116 (message "No matching if.")
1117 ;; Set mark, move point.
1118 (goto-char endif-point
)
1120 (goto-char if-point
)))))
1122 (defvar fortran-if-start-re
"\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
1124 (defun fortran-end-if ()
1125 "Search forwards for first unmatched ENDIF.
1126 Return point or nil."
1127 (let ((case-fold-search t
))
1128 (if (save-excursion (beginning-of-line)
1129 (skip-chars-forward " \t0-9")
1130 (looking-at "end[ \t]*if\\b"))
1133 ;; Search for one. The point has been already been moved to first
1134 ;; letter on line but this should not cause troubles.
1137 (while (and (not (= count
0))
1138 (not (eq (fortran-next-statement) 'last-statement
))
1139 ;; Keep local to subprogram.
1140 (not (and (looking-at fortran-end-prog-re
)
1141 (fortran-check-end-prog-re))))
1142 (skip-chars-forward " \t0-9")
1143 (cond ((looking-at "end[ \t]*if\\b")
1144 (setq count
(- count
1)))
1145 ((looking-at fortran-if-start-re
)
1148 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1149 (let (then-test) ; Multi-line if-then.
1151 (and (= (forward-line 1) 0)
1152 ;; Search forward for then.
1153 (looking-at " [^ 0\n]\\|\t[1-9]")
1157 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1159 (setq count
(+ count
1)))))))
1161 ;; All pairs accounted for.
1164 (defun fortran-beginning-if ()
1165 "Search backwards for first unmatched IF-THEN.
1166 Return point or nil."
1167 (let ((case-fold-search t
))
1169 ;; May be sitting on multi-line if-then statement, first
1170 ;; move to beginning of current statement. Note:
1171 ;; `fortran-previous-statement' moves to previous statement
1172 ;; *unless* current statement is first one. Only move
1173 ;; forward if not first-statement.
1174 (if (not (eq (fortran-previous-statement) 'first-statement
))
1175 (fortran-next-statement))
1176 (skip-chars-forward " \t0-9")
1178 (looking-at fortran-if-start-re
)
1180 (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1181 ;; Multi-line if-then.
1184 (and (= (forward-line 1) 0)
1185 ;; Search forward for then.
1186 (looking-at " [^ 0\n]\\|\t[1-9]")
1190 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1197 (while (and (not (= count
0))
1198 (not (eq (fortran-previous-statement) 'first-statement
))
1199 ;; Keep local to subprogram.
1200 (not (and (looking-at fortran-end-prog-re
)
1201 (fortran-check-end-prog-re))))
1202 (skip-chars-forward " \t0-9")
1203 (cond ((looking-at fortran-if-start-re
)
1206 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1207 (let (then-test) ; Multi-line if-then.
1209 (and (= (forward-line 1) 0)
1210 ;; Search forward for then.
1211 (looking-at " [^ 0\n]\\|\t[1-9]")
1215 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1217 (setq count
(- count
1)))))
1218 ((looking-at "end[ \t]*if\\b")
1219 (setq count
(+ count
1)))))
1221 ;; All pairs accounted for.
1224 (defun fortran-indent-line ()
1225 "Indent current Fortran line based on its contents and on previous lines."
1227 (let ((cfi (fortran-calculate-indent)))
1230 (if (or (not (= cfi
(fortran-current-line-indentation)))
1231 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t
)
1232 (not (fortran-line-number-indented-correctly-p))))
1233 (fortran-indent-to-column cfi
)
1235 (if (and (not (looking-at fortran-comment-line-start-skip
))
1236 (fortran-find-comment-start-skip))
1237 (fortran-indent-comment))))
1238 ;; Never leave point in left margin.
1239 (if (< (current-column) cfi
)
1240 (move-to-column cfi
))
1241 (if (and auto-fill-function
1242 (> (save-excursion (end-of-line) (current-column))
1247 (if fortran-blink-matching-if
1249 (fortran-blink-matching-if)
1250 (fortran-blink-matching-do)))))
1252 ;; Historically this was a separate function which advertised itself
1253 ;; as reindenting but only did so where `most likely to be necessary'.
1254 (defalias 'fortran-indent-new-line
'reindent-then-newline-and-indent
)
1256 (defun fortran-indent-subprogram ()
1257 "Properly indent the Fortran subprogram which contains point."
1261 (message "Indenting subprogram...")
1262 (indent-region (point) (mark) nil
))
1263 (message "Indenting subprogram...done."))
1265 (defun fortran-calculate-indent ()
1266 "Calculates the Fortran indent column based on previous lines."
1267 (let (icol first-statement
(case-fold-search t
)
1268 (fortran-minimum-statement-indent
1269 (if indent-tabs-mode
1270 fortran-minimum-statement-indent-tab
1271 fortran-minimum-statement-indent-fixed
)))
1273 (setq first-statement
(fortran-previous-statement))
1275 (setq icol fortran-minimum-statement-indent
)
1277 (if (= (point) (point-min))
1278 (setq icol fortran-minimum-statement-indent
)
1279 (setq icol
(fortran-current-line-indentation)))
1280 (skip-chars-forward " \t0-9")
1281 (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
1282 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
1283 (let (then-test) ;multi-line if-then
1284 (while (and (= (forward-line 1) 0)
1285 ;;search forward for then
1286 (looking-at " [^ 0\n]\\|\t[1-9]")
1287 (not (setq then-test
1290 *[^ \t_$(=a-z0-9]")))))
1292 (setq icol
(+ icol fortran-if-indent
))))
1293 ((looking-at "else\\(if\\)?\\b")
1294 (setq icol
(+ icol fortran-if-indent
)))
1295 ((looking-at "select[ \t]*case[ \t](.*)")
1296 (setq icol
(+ icol fortran-if-indent
)))
1297 ((looking-at "case[ \t]*(.*)")
1298 (setq icol
(+ icol fortran-if-indent
)))
1299 ((looking-at "case[ \t]*default\\b")
1300 (setq icol
(+ icol fortran-if-indent
)))
1301 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1302 (setq icol
(+ icol fortran-if-indent
)))
1303 ((looking-at "where[ \t]*(.*)[ \t]*\n")
1304 (setq icol
(+ icol fortran-if-indent
)))
1305 ((looking-at "do\\b")
1306 (setq icol
(+ icol fortran-do-indent
)))
1308 "\\(structure\\|union\\|map\\|interface\\)\
1309 \\b[ \t]*[^ \t=(a-z]")
1310 (setq icol
(+ icol fortran-structure-indent
)))
1311 ((and (looking-at fortran-end-prog-re1
)
1312 (fortran-check-end-prog-re))
1313 ;; Previous END resets indent to minimum
1314 (setq icol fortran-minimum-statement-indent
))))))
1317 (cond ((looking-at "[ \t]*$"))
1318 ((looking-at fortran-comment-line-start-skip
)
1319 (cond ((eq fortran-comment-indent-style
'relative
)
1320 (setq icol
(+ icol fortran-comment-line-extra-indent
)))
1321 ((eq fortran-comment-indent-style
'fixed
)
1322 (setq icol
(+ fortran-minimum-statement-indent
1323 fortran-comment-line-extra-indent
))))
1324 (setq fortran-minimum-statement-indent
0))
1325 ((or (looking-at (concat "[ \t]*"
1327 fortran-continuation-string
)))
1328 (looking-at " [^ 0\n]\\|\t[1-9]"))
1329 (setq icol
(+ icol fortran-continuation-indent
)))
1330 ((looking-at "[ \t]*#") ; Check for cpp directive.
1331 (setq fortran-minimum-statement-indent
0 icol
0))
1333 ((and fortran-check-all-num-for-matching-do
1334 (looking-at "[ \t]*[0-9]+")
1335 (fortran-check-for-matching-do))
1336 (setq icol
(- icol fortran-do-indent
)))
1338 (skip-chars-forward " \t0-9")
1339 (cond ((looking-at "end[ \t]*\\(if\\|select\\|where\\)\\b")
1340 (setq icol
(- icol fortran-if-indent
)))
1341 ((looking-at "else\\(if\\)?\\b")
1342 (setq icol
(- icol fortran-if-indent
)))
1343 ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
1344 (setq icol
(- icol fortran-if-indent
)))
1345 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1346 (setq icol
(- icol fortran-if-indent
)))
1347 ((and (looking-at "continue\\b")
1348 (fortran-check-for-matching-do))
1349 (setq icol
(- icol fortran-do-indent
)))
1350 ((looking-at "end[ \t]*do\\b")
1351 (setq icol
(- icol fortran-do-indent
)))
1352 ((looking-at "end[ \t]*\
1353 \\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1354 (setq icol
(- icol fortran-structure-indent
)))
1355 ((and (looking-at fortran-end-prog-re1
)
1356 (fortran-check-end-prog-re)
1357 (not (= icol fortran-minimum-statement-indent
)))
1358 (message "Warning: `end' not in column %d. Probably\
1359 an unclosed block." fortran-minimum-statement-indent
))))))
1360 (max fortran-minimum-statement-indent icol
)))
1362 (defun fortran-current-line-indentation ()
1363 "Indentation of current line, ignoring Fortran line number or continuation.
1364 This is the column position of the first non-whitespace character
1365 aside from the line number and/or column 5/8 line-continuation character.
1366 For comment lines, returns indentation of the first
1367 non-indentation text within the comment."
1370 (cond ((looking-at fortran-comment-line-start-skip
)
1371 (goto-char (match-end 0))
1373 (if (stringp fortran-comment-indent-char
)
1374 fortran-comment-indent-char
1375 (char-to-string fortran-comment-indent-char
))))
1376 ((or (looking-at " [^ 0\n]\\|\t[1-9]"))
1377 (goto-char (match-end 0)))
1379 ;; Move past line number.
1380 (skip-chars-forward "[ \t0-9]")))
1381 ;; Move past whitespace.
1382 (skip-chars-forward " \t")
1385 (defun fortran-indent-to-column (col)
1386 "Indent current line with spaces to column COL.
1387 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
1388 line, and this continuation character is retained on indentation;
1389 2) If `fortran-continuation-string' is the first non-whitespace
1390 character, this is a continuation line;
1391 3) A non-continuation line which has a number as the first
1392 non-whitespace character is a numbered line.
1393 4) A TAB followed by a digit indicates a continuation line."
1396 (if (looking-at fortran-comment-line-start-skip
)
1397 (if fortran-comment-indent-style
1398 (let* ((char (if (stringp fortran-comment-indent-char
)
1399 (aref fortran-comment-indent-char
0)
1400 fortran-comment-indent-char
))
1401 (chars (string ? ?
\t char
)))
1402 (goto-char (match-end 0))
1403 (skip-chars-backward chars
)
1404 (delete-region (point) (progn (skip-chars-forward chars
)
1406 (insert-char char
(- col
(current-column)))))
1407 (if (looking-at "\t[1-9]")
1408 (if indent-tabs-mode
1409 (goto-char (match-end 0))
1412 (insert fortran-continuation-string
))
1413 (if (looking-at " [^ 0\n]")
1414 (if indent-tabs-mode
1415 (progn (delete-char 6)
1416 (insert ?
\t (fortran-numerical-continuation-char) 1))
1418 (delete-horizontal-space)
1419 ;; Put line number in columns 0-4
1420 ;; or put continuation character in column 5.
1422 ((looking-at (regexp-quote fortran-continuation-string
))
1423 (if indent-tabs-mode
1426 (if indent-tabs-mode
1427 fortran-minimum-statement-indent-tab
1428 fortran-minimum-statement-indent-fixed
))
1430 (insert-char (fortran-numerical-continuation-char) 1))
1433 ((looking-at "[0-9]+")
1434 (let ((extra-space (- 5 (- (match-end 0) (point)))))
1435 (if (< extra-space
0)
1436 (message "Warning: line number exceeds 5-digit limit.")
1437 (indent-to (min fortran-line-number-indent extra-space
))))
1438 (skip-chars-forward "0-9")))))
1439 ;; Point is now after any continuation character or line number.
1440 ;; Put body of statement where specified.
1441 (delete-horizontal-space)
1443 ;; Indent any comment following code on the same line.
1444 (if (and comment-start-skip
1445 (fortran-find-comment-start-skip))
1446 (progn (goto-char (match-beginning 0))
1447 (if (not (= (current-column)
1448 (fortran-comment-indent-function)))
1449 (progn (delete-horizontal-space)
1451 (fortran-comment-indent-function)))))))))
1453 (defun fortran-line-number-indented-correctly-p ()
1454 "Return t if current line's line number is correctly indented.
1455 Do not call if there is no line number."
1458 (skip-chars-forward " \t")
1459 (and (<= (current-column) fortran-line-number-indent
)
1460 (or (= (current-column) fortran-line-number-indent
)
1461 (progn (skip-chars-forward "0-9")
1462 (= (current-column) 5))))))
1464 (defun fortran-check-for-matching-do ()
1465 "When called from a numbered statement, return t if matching DO is found.
1466 Otherwise return nil."
1467 (let ((case-fold-search t
)
1471 (if (looking-at "[ \t]*[0-9]+")
1473 (skip-chars-forward " \t")
1474 (skip-chars-forward "0") ;skip past leading zeros
1476 (buffer-substring (point) (progn
1477 (skip-chars-forward "0-9")
1483 (and (re-search-backward
1484 (concat "\\(^[ \t0-9]*do[ \t]*0*" charnum
"\\b\\)\\|"
1485 "\\(^[ \t]*0*" charnum
"\\b\\)")
1487 (looking-at (concat "^[ \t0-9]*do[ \t]*0*"
1490 (defun fortran-find-comment-start-skip ()
1491 "Move to past `comment-start-skip' found on current line.
1492 Return t if `comment-start-skip' found, nil if not."
1493 ;; In order to move point only if comment-start-skip is found, this
1494 ;; one uses a lot of save-excursions. Note that re-search-forward
1495 ;; moves point even if comment-start-skip is inside a string-constant.
1496 ;; Some code expects certain values for match-beginning and end
1499 (re-search-forward comment-start-skip
(line-end-position) t
))
1500 (let ((save-match-beginning (match-beginning 0))
1501 (save-match-end (match-end 0)))
1502 (if (fortran-is-in-string-p (match-beginning 0))
1504 (goto-char save-match-end
)
1505 (fortran-find-comment-start-skip)) ; recurse for rest of line
1506 (goto-char save-match-beginning
)
1507 (re-search-forward comment-start-skip
(line-end-position) t
)
1508 (goto-char (match-end 0))
1512 ;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1513 ;; Test if TAB format continuation lines work.
1514 (defun fortran-is-in-string-p (where)
1515 "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
1519 ((bolp) nil
) ; bol is never inside a string
1520 ((save-excursion ; comment lines too
1522 (looking-at fortran-comment-line-start-skip
)) nil
)
1523 (t (let (;; ok, serious now. Init some local vars:
1524 (parse-state '(0 nil nil nil nil nil
0))
1525 (quoted-comment-start (if comment-start
1526 (regexp-quote comment-start
)))
1528 parse-limit end-of-line
)
1529 ;; move to start of current statement
1530 (fortran-next-statement)
1531 (fortran-previous-statement)
1532 ;; now parse up to WHERE
1534 (if (or ;; skip to next line if:
1536 (looking-at fortran-comment-line-start-skip
)
1537 ;; - at end of line?
1539 ;; - not in a string and after comment-start?
1540 (and (not (nth 3 parse-state
))
1542 (equal comment-start
1543 (char-to-string (preceding-char)))))
1544 (if (> (forward-line) 0)
1545 (setq not-done nil
))
1547 ;; if we are at beginning of code line, skip any
1548 ;; whitespace, labels and tab continuation markers.
1549 (if (bolp) (skip-chars-forward " \t0-9"))
1550 ;; if we are in column <= 5 now, check for continuation char
1551 (cond ((= 5 (current-column)) (forward-char 1))
1552 ((and (< (current-column) 5)
1553 (equal fortran-continuation-string
1554 (char-to-string (following-char)))
1556 ;; find out parse-limit from here
1557 (setq end-of-line
(line-end-position))
1558 (setq parse-limit
(min where end-of-line
))
1559 ;; parse max up to comment-start, if non-nil and in current line
1562 (if (re-search-forward quoted-comment-start end-of-line t
)
1563 (setq parse-limit
(min (point) parse-limit
)))))
1564 ;; now parse if still in limits
1565 (if (< (point) where
)
1566 (setq parse-state
(parse-partial-sexp
1567 (point) parse-limit nil nil parse-state
))
1568 (setq not-done nil
))))
1570 (nth 3 parse-state
))))))
1572 (defun fortran-auto-fill-mode (arg)
1573 "Toggle fortran-auto-fill mode.
1574 With ARG, turn `fortran-auto-fill' mode on iff ARG is positive.
1575 In `fortran-auto-fill' mode, inserting a space at a column beyond `fill-column'
1576 automatically breaks the line at a previous space."
1578 (prog1 (setq auto-fill-function
1580 (not auto-fill-function
)
1581 (> (prefix-numeric-value arg
) 0))
1582 #'fortran-do-auto-fill
1584 (force-mode-line-update)))
1586 (defun fortran-do-auto-fill ()
1587 (if (> (current-column) fill-column
)
1588 (fortran-indent-line)))
1590 (defun fortran-fill ()
1591 (let* ((auto-fill-function #'fortran-do-auto-fill
)
1593 (bol (line-beginning-position))
1594 (eol (line-end-position))
1595 (bos (min eol
(+ bol
(fortran-current-line-indentation))))
1599 (if (looking-at fortran-comment-line-start-skip
)
1600 nil
; OK to break quotes on comment lines.
1601 (move-to-column fill-column
)
1602 (if (fortran-is-in-string-p (point))
1603 (save-excursion (re-search-backward "\\S\"\\s\"\\S\"" bol t
)
1604 (if fortran-break-before-delimiters
1607 ;; decide where to split the line. If a position for a quoted
1608 ;; string was found above then use that, else break the line
1609 ;; before the last delimiter.
1610 ;; Delimiters are whitespace, commas, and operators.
1611 ;; Will break before a pair of *'s.
1615 (move-to-column (1+ fill-column
))
1616 (skip-chars-backward "^ \t\n,'+-/*=)"
1617 ;;; (if fortran-break-before-delimiters
1618 ;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
1620 (if (<= (point) (1+ bos
))
1622 (move-to-column (1+ fill-column
))
1623 ;;what is this doing???
1624 (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t
))
1627 (re-search-forward "[ \t]" opoint t
)
1629 (if (looking-at "\\s\"")
1631 (skip-chars-backward " \t\*")))
1632 (if fortran-break-before-delimiters
1635 ;; if we are in an in-line comment, don't break unless the
1636 ;; line of code is longer than it should be. Otherwise
1637 ;; break the line at the column computed above.
1639 ;; Need to use fortran-find-comment-start-skip to make sure that quoted !'s
1640 ;; don't prevent a break.
1641 (if (not (or (save-excursion
1642 (if (and (re-search-backward comment-start-skip bol t
)
1643 (not (fortran-is-in-string-p (point))))
1645 (skip-chars-backward " \t")
1646 (< (current-column) (1+ fill-column
)))))
1648 (goto-char fill-point
)
1650 (if (> (save-excursion
1651 (goto-char fill-point
)
1654 (progn (goto-char fill-point
)
1655 (fortran-break-line))
1657 (if (> (save-excursion
1658 (goto-char fill-point
)
1660 (+ (fortran-calculate-indent) fortran-continuation-indent
))
1662 (goto-char fill-point
)
1663 (fortran-break-line))))))))
1665 (defun fortran-break-line ()
1666 (let ((opoint (point))
1667 (bol (line-beginning-position))
1668 (eol (line-end-position))
1669 (comment-string nil
))
1671 (if (and comment-start-skip
(fortran-find-comment-start-skip))
1673 (re-search-backward comment-start-skip bol t
)
1674 (setq comment-string
(buffer-substring (point) eol
))
1675 (delete-region (point) eol
))))
1676 ;; Forward line 1 really needs to go to next non white line
1677 (if (save-excursion (forward-line)
1678 (or (looking-at " [^ 0\n]\\|\t[1-9]")))
1681 (delete-region (point) (match-end 0))
1682 (delete-horizontal-space)
1684 (fortran-split-line))
1689 (delete-horizontal-space)
1690 (indent-to (fortran-comment-indent-function))
1691 (insert comment-string
)))))
1693 (defun fortran-analyze-file-format ()
1694 "Return nil if fixed format is used, t if TAB formatting is used.
1695 Use `fortran-tab-mode-default' if no non-comment statements are found in the
1696 file before the end or the first `fortran-analyze-depth' lines."
1699 (goto-char (point-min))
1703 (eq (char-after) ?
\t)
1705 (> i fortran-analyze-depth
)))
1709 ((eq (char-after) ?
\t) t
)
1710 ((looking-at " ") nil
)
1711 (fortran-tab-mode-default t
)
1714 (or (assq 'fortran-tab-mode-string minor-mode-alist
)
1715 (setq minor-mode-alist
(cons
1716 '(fortran-tab-mode-string
1717 (indent-tabs-mode fortran-tab-mode-string
))
1720 (defun fortran-fill-paragraph (&optional justify
)
1721 "Fill surrounding comment block as paragraphs, else fill statement.
1722 Intended as the value of `fill-paragraph-function'."
1726 (if (not (looking-at fortran-comment-line-start-skip
))
1727 (fortran-fill-statement)
1728 ;; We're in a comment block. Find the start and end of a
1729 ;; paragraph, delimited either by non-comment lines or empty
1730 ;; comments. (Get positions as markers, since the
1731 ;; `indent-region' below can shift the block's end).
1732 (let* ((non-empty-comment
1733 (concat "\\(" fortran-comment-line-start-skip
"\\)"
1735 (start (save-excursion
1736 ;; Find (start of) first line.
1737 (while (and (zerop (forward-line -
1))
1738 (looking-at non-empty-comment
)))
1739 (or (looking-at non-empty-comment
)
1740 (forward-line)) ; overshot
1742 (end (save-excursion
1743 ;; Find start of first line past region to fill.
1746 (looking-at non-empty-comment
)))
1748 ;; Indent the block, find the string comprising the effective
1749 ;; comment start skip and use that as a fill-prefix for
1750 ;; filling the region.
1751 (indent-region start end nil
)
1752 (let ((paragraph-ignore-fill-prefix nil
)
1755 (looking-at fortran-comment-line-start-skip
)
1757 (let (fill-paragraph-function)
1758 (fill-region start end justify
))) ; with normal `fill-paragraph'
1759 (set-marker start nil
)
1760 (set-marker end nil
))))
1763 (defun fortran-fill-statement ()
1764 "Fill a fortran statement up to `fill-column'."
1766 (let ((auto-fill-function #'fortran-do-auto-fill
))
1767 (if (not (save-excursion
1769 (or (looking-at "[ \t]*$")
1770 (looking-at fortran-comment-line-start-skip
)
1771 (and comment-start-skip
1772 (looking-at (concat "[ \t]*" comment-start-skip
))))))
1774 ;; Find beginning of statement.
1775 (fortran-next-statement)
1776 (fortran-previous-statement)
1777 ;; Re-indent initially.
1778 (fortran-indent-line)
1779 ;; Replace newline plus continuation field plus indentation with
1783 (fortran-remove-continuation)))
1784 (fortran-previous-statement)))
1785 (fortran-indent-line)))
1787 (defun fortran-strip-sqeuence-nos (do-space)
1788 "Delete all text after column 72 (assumed to be sequence numbers).
1789 Also delete trailing whitespace after stripping such text. Supplying
1790 prefix arg DO-SPACE prevent stripping the whitespace."
1793 (goto-char (point-min))
1794 (while (re-search-forward (concat "^" (make-string 72 ?.
)" \\(.*\\)")
1796 (replace-match "" nil nil nil
1)
1797 (unless do-space
(delete-horizontal-space)))))
1799 ;; This code used to live in add-log.el, but this is a better place
1801 (defun fortran-current-defun ()
1802 "Function to use for `add-log-current-defun-function' in Fortran mode."
1803 ;; We must be inside function body for this to work.
1804 (fortran-beginning-of-subprogram)
1805 (let ((case-fold-search t
)) ; case-insensitive
1806 ;; search for fortran subprogram start
1807 (if (re-search-forward
1808 "^[ \t]*\\(program\\|subroutine\\|function\
1809 \\|[ \ta-z0-9*()]*[ \t]+function\\|\\(block[ \t]*data\\)\\)"
1810 (save-excursion (fortran-end-of-subprogram)
1813 (or (match-string-no-properties 2)
1815 ;; move to EOL or before first left paren
1816 (if (re-search-forward "[(\n]" nil t
)
1817 (progn (backward-char)
1818 (skip-chars-backward " \t"))
1820 ;; Use the name preceding that.
1821 (buffer-substring-no-properties (point) (progn (backward-sexp)
1827 ;;; fortran.el ends here