1 ;;; fortran.el --- Fortran mode for GNU Emacs
3 ;; Copyright (c) 1986, 93, 94, 95, 97, 98, 99, 2000
4 ;; Free Software Foundation, Inc.
6 ;; Author: Michael D. Prange <prange@erl.mit.edu>
7 ;; Maintainer: Dave Love <fx@gnu.org>
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 ;; This mode is documented in the Emacs manual.
31 ;; Note that it is for editing Fortran77 or Fortran90 fixed source
32 ;; form. For editing Fortran 90 free format source, use `f90-mode'
37 ;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
39 ;; We acknowledge many contributions and valuable suggestions by
40 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
41 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
42 ;; Gary Sabot and Richard Stallman.
48 ;; * Tidy it all up (more)!
49 ;; * Implement insertion and removal of statement continuations in
50 ;; mixed f77/f90 style, with the first `&' past column 72 and the
51 ;; second in column 6.
52 ;; * Support any other extensions to f77 grokked by GNU Fortran.
55 "Fortran mode for Emacs"
56 :link
'(custom-manual "(emacs)Fortran")
59 (defgroup fortran-indent nil
60 "Indentation variables in Fortran mode"
64 (defgroup fortran-comment nil
65 "Comment-handling variables in Fortran mode"
71 (defcustom fortran-tab-mode-default nil
72 "*Default tabbing/carriage control style for empty files in Fortran mode.
73 A value of t specifies tab-digit style of continuation control.
74 A value of nil specifies that continuation lines are marked
75 with a character in column 6."
77 :group
'fortran-indent
)
79 ;; Buffer local, used to display mode line.
80 (defcustom fortran-tab-mode-string nil
81 "String to appear in mode line when TAB format mode is on."
82 :type
'(choice (const nil
) string
)
83 :group
'fortran-indent
)
84 (make-variable-buffer-local 'fortran-tab-mode-string
)
86 (defcustom fortran-do-indent
3
87 "*Extra indentation applied to DO blocks."
89 :group
'fortran-indent
)
91 (defcustom fortran-if-indent
3
92 "*Extra indentation applied to IF blocks."
94 :group
'fortran-indent
)
96 (defcustom fortran-structure-indent
3
97 "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
99 :group
'fortran-indent
)
101 (defcustom fortran-continuation-indent
5
102 "*Extra indentation applied to Fortran continuation lines."
104 :group
'fortran-indent
)
106 (defcustom fortran-comment-indent-style
'fixed
107 "*How to indent comments.
108 nil forces comment lines not to be touched,
109 'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
110 columns beyond `fortran-minimum-statement-indent-fixed' (for
111 `indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
112 `indent-tabs-mode' of t), and 'relative indents to current
113 Fortran indentation plus `fortran-comment-line-extra-indent'."
114 :type
'(radio (const :tag
"Untouched" nil
) (const fixed
) (const relative
))
115 :group
'fortran-indent
)
117 (defcustom fortran-comment-line-extra-indent
0
118 "*Amount of extra indentation for text within full-line comments."
120 :group
'fortran-indent
121 :group
'fortran-comment
)
123 (defcustom fortran-comment-line-start
"C"
124 "*Delimiter inserted to start new full-line comment.
125 You might want to change this to \"*\", for instance."
128 :group
'fortran-comment
)
130 ;; This used to match preprocessor lines too, but that messes up
131 ;; filling and doesn't seem to be necessary.
132 (defcustom fortran-comment-line-start-skip
133 "^[CcDd*!]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*"
134 "*Regexp to match the start of a full-line comment."
137 :group
'fortran-comment
)
139 (defcustom fortran-minimum-statement-indent-fixed
6
140 "*Minimum statement indentation for fixed format continuation style."
142 :group
'fortran-indent
)
144 (defcustom fortran-minimum-statement-indent-tab
(max tab-width
6)
145 "*Minimum statement indentation for TAB format continuation style."
147 :group
'fortran-indent
)
149 ;; Note that this is documented in the v18 manuals as being a string
150 ;; of length one rather than a single character.
151 ;; The code in this file accepts either format for compatibility.
152 (defcustom fortran-comment-indent-char
" "
153 "*Single-character string inserted for Fortran comment indentation.
156 :group
'fortran-comment
)
158 (defcustom fortran-line-number-indent
1
159 "*Maximum indentation for Fortran line numbers.
160 5 means right-justify them within their five-column field."
162 :group
'fortran-indent
)
164 (defcustom fortran-check-all-num-for-matching-do nil
165 "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
169 (defcustom fortran-blink-matching-if nil
170 "*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
171 Also, from an ENDDO statement blink on matching DO [WHILE] statement."
175 (defcustom fortran-continuation-string
"$"
176 "*Single-character string used for Fortran continuation lines.
177 In fixed format continuation style, this character is inserted in
178 column 6 by \\[fortran-split-line] to begin a continuation line.
179 Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
180 convert the line into a continuation line of the appropriate style.
185 (defcustom fortran-comment-region
"c$$$"
186 "*String inserted by \\[fortran-comment-region] at start of each \
189 :group
'fortran-comment
)
191 (defcustom fortran-electric-line-number t
192 "*Non-nil causes line number digits to be moved to the correct \
197 (defvar fortran-column-ruler-fixed
198 "0 4 6 10 20 30 40 5\
200 \[ ]|{ | | | | | | | | \
202 "String displayed above current line by \\[fortran-column-ruler].
203 This variable used in fixed format mode.")
205 (defvar fortran-column-ruler-tab
208 \[ ]| { | | | | | | | | \
210 "String displayed above current line by \\[fortran-column-ruler].
211 This variable used in TAB format mode.")
213 (defvar fortran-analyze-depth
100
214 "Number of lines to scan to determine whether to use fixed or TAB \
217 (defcustom fortran-break-before-delimiters t
218 "*Non-nil causes filling to break lines before delimiters."
222 (defvar fortran-mode-syntax-table
223 (let ((table (make-syntax-table)))
224 ;; We might like `;' to be punctuation (g77 multi-statement
225 ;; lines), but that screws abbrevs.
226 (modify-syntax-entry ?\
; "w" table)
227 (modify-syntax-entry ?
\r " " table
)
228 (modify-syntax-entry ?
+ "." table
)
229 (modify-syntax-entry ?-
"." table
)
230 (modify-syntax-entry ?
= "." table
)
231 (modify-syntax-entry ?
* "." table
)
232 (modify-syntax-entry ?
/ "." table
)
233 (modify-syntax-entry ?
\' "\"" table
)
234 (modify-syntax-entry ?
\" "\"" table
)
235 (modify-syntax-entry ?
\\ "\\" table
)
236 ;; This might be better as punctuation, as for C, but this way you
237 ;; can treat floating-point numbers as symbols.
238 (modify-syntax-entry ?.
"_" table
) ; e.g. `a.ne.b'
239 (modify-syntax-entry ?_
"_" table
)
240 (modify-syntax-entry ?$
"_" table
) ; esp. VMSisms
241 (modify-syntax-entry ?\
! "<" table
)
242 (modify-syntax-entry ?
\n ">" table
)
244 "Syntax table in use in Fortran mode buffers.")
246 ;; Comments are real pain in Fortran because there is no way to
247 ;; represent the standard comment syntax in an Emacs syntax table.
248 ;; (We can do so for F90-style). Therefore an unmatched quote in a
249 ;; standard comment will throw fontification off on the wrong track.
250 ;; So we do syntactic fontification with regexps.
252 (defvar fortran-font-lock-keywords-1 nil
253 "Subdued level highlighting for Fortran mode.")
255 (defvar fortran-font-lock-keywords-2 nil
256 "Medium level highlighting for Fortran mode.")
258 (defvar fortran-font-lock-keywords-3 nil
259 "Gaudy level highlighting for Fortran mode.")
261 (defvar fortran-font-lock-syntactic-keywords nil
262 "`font-lock-syntactic-keywords' for Fortran.
263 These get fixed-format comments fontified.")
265 (let ((comment-chars "cd\\*") ; `d' for `debugging' comments
268 (let ((re (regexp-opt
270 '("character" "byte" "integer" "logical"
271 "none" "real" "complex"
272 "double precision" "double complex"))
273 (structured-types '("structure" "union" "map"))
274 (other-types '("record" "dimension"
275 "parameter" "common" "save"
276 "external" "intrinsic" "data"
279 (mapcar (lambda (x) (concat "implicit " x
))
282 (mapcar (lambda (x) (concat "end " x
))
286 ;; In the optimized regexp above, replace spaces by a
287 ;; regexp for optional whitespace; regexp-opt would have
289 (mapconcat #'identity
(split-string re
) "[ \t]*"))))
292 (regexp-opt '("continue" "format" "end" "enddo" "if" "then"
293 "else" "endif" "elseif" "while" "inquire" "stop"
294 "return" "include" "open" "close" "read" "write"
295 "format" "print" "select" "case" "cycle" "exit"))))
298 (regexp-opt '("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne"
300 (setq fortran-font-lock-syntactic-keywords
301 ;; Fixed format comments. (!-style handled normally.)
303 (list (concat "^[" comment-chars
"]") 0 '(11))
304 (list (concat "^[^" comment-chars
"\t\n]" ".\\{71\\}"
307 (setq fortran-font-lock-keywords-1
309 ;; Program, subroutine and function declarations, plus calls.
310 (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
311 "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
312 '(1 font-lock-keyword-face
)
313 '(2 font-lock-function-name-face nil t
))))
314 (setq fortran-font-lock-keywords-2
315 (append fortran-font-lock-keywords-1
317 ;; Fontify all type specifiers (must be first; see below).
318 (cons (concat "\\<\\(" fortran-type-types
"\\)\\>")
319 'font-lock-type-face
)
320 ;; Fontify all builtin keywords (except logical, do
321 ;; and goto; see below).
322 (concat "\\<\\(" fortran-keywords
"\\)\\>")
323 ;; Fontify all builtin operators.
324 (concat "\\.\\(" fortran-logicals
"\\)\\.")
325 ;; Fontify do/goto keywords and targets, and goto tags.
326 (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
327 '(1 font-lock-keyword-face
)
328 '(2 font-lock-constant-face nil t
))
329 (cons "^ *\\([0-9]+\\)" 'font-lock-constant-face
))))
330 (setq fortran-font-lock-keywords-3
332 ;; The list `fortran-font-lock-keywords-1'.
333 fortran-font-lock-keywords-1
334 ;; Fontify all type specifiers plus their declared items.
336 (list (concat "\\<\\(" fortran-type-types
"\\)\\>[ \t(/]*\\(*\\)?")
337 ;; Fontify the type specifier.
338 '(1 font-lock-type-face
)
339 ;; Fontify each declaration item (or just the /.../ block name).
340 `(font-lock-match-c-style-declaration-item-and-skip-to-next
341 ;; Start after any *(...) expression.
343 (and (and (match-beginning ,(+ 2 (regexp-opt-depth
344 fortran-type-types
)))
348 ;; No need to clean up.
350 ;; Fontify as a variable name, functions are
351 ;; fontified elsewhere.
352 (1 font-lock-variable-name-face nil t
))))
353 ;; Things extra to `fortran-font-lock-keywords-3'
354 ;; (must be done first).
356 ;; Fontify goto-like `err=label'/`end=label' in read/write
358 '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
359 (1 font-lock-keyword-face
) (4 font-lock-constant-face nil t
))
360 ;; Highlight standard continuation character and in a
361 ;; TAB-formatted line.
362 '("^ \\([^ 0]\\)" 1 font-lock-string-face
)
363 '("^\t\\([1-9]\\)" 1 font-lock-string-face
))
366 '("^# *[a-z]+" . font-lock-keyword-face
))
367 ;; The list `fortran-font-lock-keywords-2' less that for types
369 (cdr (nthcdr (length fortran-font-lock-keywords-1
)
370 fortran-font-lock-keywords-2
)))))
372 (defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
373 "Default expressions to highlight in Fortran mode.")
375 (defvar fortran-imenu-generic-expression
376 ;; These patterns could be confused by sequence nos. in cols 72+ and
377 ;; don't allow continuations everywhere.
381 ;; [This will be fooled by `end function' allowed by G77. Also,
382 ;; it assumes sensible whitespace is employed.]
384 ;; leading whitespace:
386 ;; function declaration with optional type, e.g. `real',
387 ;; `real*4', character(*), `double precision':
388 "\\(\\sw\\|\\s-\\|[*()+]\\)*"
389 "\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)"
390 ;; Possible statement continuation:
391 "[ \t" fortran-continuation-string
"]+"
392 ;; Variable to index:
395 ;; Un-named block data
396 (list nil
"^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
397 "Imenu generic expression for `imenu-default-create-index-function'.")
399 (defvar fortran-mode-map
400 (let ((map (make-sparse-keymap)))
401 (define-key map
";" 'fortran-abbrev-start
)
402 (define-key map
"\C-c;" 'fortran-comment-region
)
403 (define-key map
"\M-;" 'fortran-indent-comment
)
404 (define-key map
"\M-\n" 'fortran-split-line
)
405 (define-key map
"\M-\C-q" 'fortran-indent-subprogram
)
406 (define-key map
"\C-c\C-w" 'fortran-window-create-momentarily
)
407 (define-key map
"\C-c\C-r" 'fortran-column-ruler
)
408 (define-key map
"\C-c\C-p" 'fortran-previous-statement
)
409 (define-key map
"\C-c\C-n" 'fortran-next-statement
)
410 (define-key map
"\C-c\C-d" 'fortran-join-line
) ; like f90
411 (define-key map
"\M-^" 'fortran-join-line
) ; subvert delete-indentation
412 (define-key map
"0" 'fortran-electric-line-number
)
413 (define-key map
"1" 'fortran-electric-line-number
)
414 (define-key map
"2" 'fortran-electric-line-number
)
415 (define-key map
"3" 'fortran-electric-line-number
)
416 (define-key map
"4" 'fortran-electric-line-number
)
417 (define-key map
"5" 'fortran-electric-line-number
)
418 (define-key map
"6" 'fortran-electric-line-number
)
419 (define-key map
"7" 'fortran-electric-line-number
)
420 (define-key map
"8" 'fortran-electric-line-number
)
421 (define-key map
"9" 'fortran-electric-line-number
)
424 (unless (boundp 'fortran-mode-menu
)
426 fortran-mode-menu map
""
428 ["Manual" (info "(emacs)Fortran")]
429 ["Customize" :filter
(lambda (&rest junk
)
430 (cdr (custom-menu-create 'fortran
)))]
432 ["Save" Custom-save t
]
433 ["Reset to Current" Custom-reset-current t
]
434 ["Reset to Saved" Custom-reset-saved t
]
435 ["Reset to Standard Settings" Custom-reset-standard t
]
437 ["Toggle Auto-fill" fortran-auto-fill-mode
:style toggle
438 :selected
(eq auto-fill-function
'fortran-auto-fill
)]
439 ["Toggle abbrev-mode" abbrev-mode
:style toggle
:selected abbrev-mode
]
441 ["Comment-out Region" fortran-comment-region mark-active
]
442 ["Uncomment-out region"
443 (fortran-comment-region (region-beginning) (region-end) 1)
445 ["Indent Region" indent-region mark-active
]
446 ["Indent Subprogram" fortran-indent-subprogram t
]
448 ["Beginning of Subprogram" fortran-beginning-of-subprogram t
]
449 ["End of Subprogram" fortran-end-of-subprogram t
]
451 ["Subprogram" mark-defun
t]
452 ["IF Block" fortran-mark-if t
]
453 ["DO Block" fortran-mark-do t
])
454 ["Narrow to Subprogram" narrow-to-defun
t]
457 ["Temporary column ruler" fortran-column-ruler t
]
458 ["72-column window" fortran-window-create t
]
460 (enlarge-window-horizontally (- (frame-width) (window-width)))
461 (< (window-width) (frame-width))]
462 ["Momentary 72-column window" fortran-window-create-momentarily t
]
464 ["Break Line at Point" fortran-split-line t
]
465 ["Join Line" fortran-join-line t
]
466 ["Fill Statement/Comment" fill-paragraph t
]
469 imenu-add-menubar-index
(not (and (boundp 'imenu--index-alist
)
470 imenu--index-alist
))])))
472 "Keymap used in Fortran mode.")
474 (defvar fortran-mode-abbrev-table
475 (let ((ac abbrevs-changed
))
476 (define-abbrev-table 'fortran-mode-abbrev-table
())
477 (define-abbrev fortran-mode-abbrev-table
";au" "automatic" nil
)
478 (define-abbrev fortran-mode-abbrev-table
";b" "byte" nil
)
479 (define-abbrev fortran-mode-abbrev-table
";bd" "block data" nil
)
480 (define-abbrev fortran-mode-abbrev-table
";ch" "character" nil
)
481 (define-abbrev fortran-mode-abbrev-table
";cl" "close" nil
)
482 (define-abbrev fortran-mode-abbrev-table
";c" "continue" nil
)
483 (define-abbrev fortran-mode-abbrev-table
";cm" "common" nil
)
484 (define-abbrev fortran-mode-abbrev-table
";cx" "complex" nil
)
485 (define-abbrev fortran-mode-abbrev-table
";df" "define" nil
)
486 (define-abbrev fortran-mode-abbrev-table
";di" "dimension" nil
)
487 (define-abbrev fortran-mode-abbrev-table
";do" "double" nil
)
488 (define-abbrev fortran-mode-abbrev-table
";dc" "double complex" nil
)
489 (define-abbrev fortran-mode-abbrev-table
";dp" "double precision" nil
)
490 (define-abbrev fortran-mode-abbrev-table
";dw" "do while" nil
)
491 (define-abbrev fortran-mode-abbrev-table
";e" "else" nil
)
492 (define-abbrev fortran-mode-abbrev-table
";ed" "enddo" nil
)
493 (define-abbrev fortran-mode-abbrev-table
";el" "elseif" nil
)
494 (define-abbrev fortran-mode-abbrev-table
";en" "endif" nil
)
495 (define-abbrev fortran-mode-abbrev-table
";eq" "equivalence" nil
)
496 (define-abbrev fortran-mode-abbrev-table
";ew" "endwhere" nil
)
497 (define-abbrev fortran-mode-abbrev-table
";ex" "external" nil
)
498 (define-abbrev fortran-mode-abbrev-table
";ey" "entry" nil
)
499 (define-abbrev fortran-mode-abbrev-table
";f" "format" nil
)
500 (define-abbrev fortran-mode-abbrev-table
";fa" ".false." nil
)
501 (define-abbrev fortran-mode-abbrev-table
";fu" "function" nil
)
502 (define-abbrev fortran-mode-abbrev-table
";g" "goto" nil
)
503 (define-abbrev fortran-mode-abbrev-table
";im" "implicit" nil
)
504 (define-abbrev fortran-mode-abbrev-table
";ib" "implicit byte" nil
)
505 (define-abbrev fortran-mode-abbrev-table
";ic" "implicit complex" nil
)
506 (define-abbrev fortran-mode-abbrev-table
";ich" "implicit character" nil
)
507 (define-abbrev fortran-mode-abbrev-table
";ii" "implicit integer" nil
)
508 (define-abbrev fortran-mode-abbrev-table
";il" "implicit logical" nil
)
509 (define-abbrev fortran-mode-abbrev-table
";ir" "implicit real" nil
)
510 (define-abbrev fortran-mode-abbrev-table
";inc" "include" nil
)
511 (define-abbrev fortran-mode-abbrev-table
";in" "integer" nil
)
512 (define-abbrev fortran-mode-abbrev-table
";intr" "intrinsic" nil
)
513 (define-abbrev fortran-mode-abbrev-table
";l" "logical" nil
)
514 (define-abbrev fortran-mode-abbrev-table
";n" "namelist" nil
)
515 (define-abbrev fortran-mode-abbrev-table
";o" "open" nil
) ; was ;op
516 (define-abbrev fortran-mode-abbrev-table
";pa" "parameter" nil
)
517 (define-abbrev fortran-mode-abbrev-table
";pr" "program" nil
)
518 (define-abbrev fortran-mode-abbrev-table
";ps" "pause" nil
)
519 (define-abbrev fortran-mode-abbrev-table
";p" "print" nil
)
520 (define-abbrev fortran-mode-abbrev-table
";rc" "record" nil
)
521 (define-abbrev fortran-mode-abbrev-table
";re" "real" nil
)
522 (define-abbrev fortran-mode-abbrev-table
";r" "read" nil
)
523 (define-abbrev fortran-mode-abbrev-table
";rt" "return" nil
)
524 (define-abbrev fortran-mode-abbrev-table
";rw" "rewind" nil
)
525 (define-abbrev fortran-mode-abbrev-table
";s" "stop" nil
)
526 (define-abbrev fortran-mode-abbrev-table
";sa" "save" nil
)
527 (define-abbrev fortran-mode-abbrev-table
";st" "structure" nil
)
528 (define-abbrev fortran-mode-abbrev-table
";sc" "static" nil
)
529 (define-abbrev fortran-mode-abbrev-table
";su" "subroutine" nil
)
530 (define-abbrev fortran-mode-abbrev-table
";tr" ".true." nil
)
531 (define-abbrev fortran-mode-abbrev-table
";ty" "type" nil
)
532 (define-abbrev fortran-mode-abbrev-table
";vo" "volatile" nil
)
533 (define-abbrev fortran-mode-abbrev-table
";w" "write" nil
)
534 (define-abbrev fortran-mode-abbrev-table
";wh" "where" nil
)
535 (setq abbrevs-changed ac
)
536 fortran-mode-abbrev-table
))
538 (eval-when-compile ; silence compiler
539 (defvar imenu-case-fold-search
)
540 (defvar imenu-syntax-alist
))
542 (defcustom fortran-mode-hook nil
543 "Hook run by Fortran mode."
548 (defun fortran-mode ()
549 "Major mode for editing Fortran code.
550 \\[fortran-indent-line] indents the current Fortran line correctly.
551 DO statements must not share a common CONTINUE.
553 Type ;? or ;\\[help-command] to display a list of built-in abbrevs for
559 Variables controlling indentation style and extra features:
562 If you want to use comments starting with `!',
563 set this to the string \"!\".
565 Extra indentation within do blocks. (default 3)
567 Extra indentation within if blocks. (default 3)
568 `fortran-structure-indent'
569 Extra indentation within structure, union, map and interface blocks.
571 `fortran-continuation-indent'
572 Extra indentation applied to continuation statements. (default 5)
573 `fortran-comment-line-extra-indent'
574 Amount of extra indentation for text within full-line comments. (default 0)
575 `fortran-comment-indent-style'
576 nil means don't change indentation of text in full-line comments,
577 fixed means indent that text at `fortran-comment-line-extra-indent' beyond
578 the value of `fortran-minimum-statement-indent-fixed' (for fixed
579 format continuation style) or `fortran-minimum-statement-indent-tab'
580 (for TAB format continuation style).
581 relative means indent at `fortran-comment-line-extra-indent' beyond the
582 indentation for a line of code.
584 `fortran-comment-indent-char'
585 Single-character string to be inserted instead of space for
586 full-line comment indentation. (default \" \")
587 `fortran-minimum-statement-indent-fixed'
588 Minimum indentation for Fortran statements in fixed format mode. (def.6)
589 `fortran-minimum-statement-indent-tab'
590 Minimum indentation for Fortran statements in TAB format mode. (default 9)
591 `fortran-line-number-indent'
592 Maximum indentation for line numbers. A line number will get
593 less than this much indentation if necessary to avoid reaching
594 column 5. (default 1)
595 `fortran-check-all-num-for-matching-do'
596 Non-nil causes all numbered lines to be treated as possible \"continue\"
597 statements. (default nil)
598 `fortran-blink-matching-if'
599 Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
600 matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
601 statement. (default nil)
602 `fortran-continuation-string'
603 Single-character string to be inserted in column 5 of a continuation
604 line. (default \"$\")
605 `fortran-comment-region'
606 String inserted by \\[fortran-comment-region] at start of each line in
607 region. (default \"c$$$\")
608 `fortran-electric-line-number'
609 Non-nil causes line number digits to be moved to the correct column
610 as typed. (default t)
611 `fortran-break-before-delimiters'
612 Non-nil causes lines to be broken before delimiters.
615 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
616 with no args, if that value is non-nil."
618 (kill-all-local-variables)
619 (setq local-abbrev-table fortran-mode-abbrev-table
)
620 (set-syntax-table fortran-mode-syntax-table
)
621 ;; Font Lock mode support.
622 (make-local-variable 'font-lock-defaults
)
623 (setq font-lock-defaults
'((fortran-font-lock-keywords
624 fortran-font-lock-keywords-1
625 fortran-font-lock-keywords-2
626 fortran-font-lock-keywords-3
)
627 nil t
((?
/ .
"$/") ("_$" .
"w"))
628 fortran-beginning-of-subprogram
))
629 (set (make-local-variable 'font-lock-syntactic-keywords
)
630 fortran-font-lock-syntactic-keywords
)
631 (make-local-variable 'fortran-break-before-delimiters
)
632 (setq fortran-break-before-delimiters t
)
633 (make-local-variable 'indent-line-function
)
634 (setq indent-line-function
'fortran-indent-line
)
635 (make-local-variable 'comment-indent-function
)
636 (setq comment-indent-function
'fortran-comment-indent
)
637 (make-local-variable 'comment-start-skip
)
638 (setq comment-start-skip
"![ \t]*")
639 (setq fortran-comment-line-start-skip
640 "^[Cc*]\\(\\([^ \t\n]\\)\\2\\2*\\)?[ \t]*\\|^#.*")
641 (make-local-variable 'comment-start
)
642 (setq fortran-comment-line-start
"c")
643 (make-local-variable 'require-final-newline
)
644 (setq require-final-newline t
)
645 (make-local-variable 'abbrev-all-caps
)
646 (setq abbrev-all-caps t
)
647 (make-local-variable 'indent-tabs-mode
)
648 (setq indent-tabs-mode nil
)
649 ;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
650 (set (make-local-variable 'fill-column
) 72)
651 (use-local-map fortran-mode-map
)
652 (setq mode-name
"Fortran")
653 (setq major-mode
'fortran-mode
)
654 (make-local-variable 'fortran-comment-line-extra-indent
)
655 (make-local-variable 'fortran-minimum-statement-indent-fixed
)
656 (make-local-variable 'fortran-minimum-statement-indent-tab
)
657 (make-local-variable 'fortran-column-ruler-fixed
)
658 (make-local-variable 'fortran-column-ruler-tab
)
659 (setq fortran-tab-mode-string
" TAB-format")
660 (setq indent-tabs-mode
(fortran-analyze-file-format))
661 (setq imenu-case-fold-search t
)
662 (setq imenu-generic-expression fortran-imenu-generic-expression
)
663 (setq imenu-syntax-alist
'(("_$" .
"w")))
664 (set (make-local-variable 'fill-paragraph-function
) 'fortran-fill-paragraph
)
665 (set (make-local-variable 'indent-line-function
) 'fortran-indent-line
)
666 (set (make-local-variable 'indent-region-function
)
668 (let (fortran-blink-matching-if ; avoid blinking delay
669 indent-region-function
)
670 (indent-region start end nil
))))
671 (set (make-local-variable 'beginning-of-defun-function
)
672 #'fortran-beginning-of-subprogram
)
673 (set (make-local-variable 'end-of-defun-function
)
674 #'fortran-end-of-subprogram
)
675 (set (make-local-variable 'add-log-current-defun-function
)
676 #'fortran-current-defun
)
677 (set (make-local-variable 'dabbrev-case-fold-search
) 'case-fold-search
)
678 (run-hooks 'fortran-mode-hook
))
680 (defsubst fortran-comment-indent
()
682 (skip-chars-backward " \t")
683 (max (+ 1 (current-column))
686 (defun fortran-indent-comment ()
687 "Align or create comment on current line.
688 Existing comments of all types are recognized and aligned.
689 If the line has no comment, a side-by-side comment is inserted and aligned
690 if the value of `comment-start' is not nil.
691 Otherwise, a separate-line comment is inserted, on this line
692 or on a new line inserted before this line if this line is not blank."
695 ;; Recognize existing comments of either kind.
696 (cond ((looking-at fortran-comment-line-start-skip
)
697 (fortran-indent-line))
698 ((fortran-find-comment-start-skip) ; catches any inline comment and
699 ; leaves point after comment-start-skip
700 (if comment-start-skip
701 (progn (goto-char (match-beginning 0))
702 (if (not (= (current-column)
703 (fortran-comment-indent)))
704 (progn (delete-horizontal-space)
705 (indent-to (fortran-comment-indent)))))
706 (end-of-line))) ; otherwise goto end of line or sth else?
707 ;; No existing comment.
708 ;; If side-by-side comments are defined, insert one,
709 ;; unless line is now blank.
710 ((and comment-start
(not (looking-at "^[ \t]*$")))
712 (delete-horizontal-space)
713 (indent-to (fortran-comment-indent))
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 (copy-marker beg-region
))
735 (save-point (point-marker)))
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 " \\{5\\}"))) ;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
))
975 (regexp-quote fortran-continuation-string
)))
976 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))))
977 (while (and (setq not-first-statement
(= (forward-line -
1) 0))
978 (or (looking-at fortran-comment-line-start-skip
)
979 (looking-at "[ \t]*$\\| \\{5\\}[^ 0\n]\\|\t[1-9]")
980 (looking-at (concat "[ \t]*" comment-start-skip
)))))
981 (cond ((and continue-test
982 (not not-first-statement
))
983 (message "Incomplete continuation statement."))
985 (fortran-previous-statement))
986 ((not not-first-statement
)
989 (defun fortran-next-statement ()
990 "Moves point to beginning of the next Fortran statement.
991 Returns `last-statement' if that statement is the last
992 non-comment Fortran statement in the file, and nil otherwise."
994 (let (not-last-statement)
996 (while (and (setq not-last-statement
997 (and (= (forward-line 1) 0)
999 (or (looking-at fortran-comment-line-start-skip
)
1000 (looking-at "[ \t]*$\\| [^ 0\n]\\|\t[1-9]")
1001 (looking-at (concat "[ \t]*" comment-start-skip
)))))
1002 (if (not not-last-statement
)
1005 (defun fortran-blink-match (regex keyword find-begin
)
1006 "From a line matching REGEX, blink matching KEYWORD statement line.
1007 Use function FIND-BEGIN to match it."
1008 (let ((top-of-window (window-start))
1010 (case-fold-search t
)
1015 (skip-chars-forward " \t0-9")
1018 (if (not (setq matching
(funcall find-begin
)))
1019 (setq message
(concat "No matching " keyword
"."))
1020 (if (< matching top-of-window
)
1022 (goto-char matching
)
1026 (buffer-substring (point)
1027 (line-end-position)))))))
1029 (message "%s" message
)
1030 (goto-char matching
)
1032 (goto-char end-point
))))))
1034 (defun fortran-blink-matching-if ()
1035 "From an ENDIF or ELSE statement, blink the matching IF statement."
1036 (fortran-blink-match "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"
1037 "if" #'fortran-beginning-if
))
1039 (defun fortran-blink-matching-do ()
1040 "From an ENDDO statement, blink the matching DO or DO WHILE statement."
1041 (fortran-blink-match "end[ \t]*do\\b" "do" #'fortran-beginning-do
))
1043 (defun fortran-mark-do ()
1044 "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
1045 The marks are pushed."
1047 (let (enddo-point do-point
)
1048 (if (setq enddo-point
(fortran-end-do))
1049 (if (not (setq do-point
(fortran-beginning-do)))
1050 (message "No matching do.")
1051 (goto-char enddo-point
)
1053 (goto-char do-point
)))))
1055 (defun fortran-end-do ()
1056 "Search forward for first unmatched ENDDO.
1057 Return point or nil."
1058 (let ((case-fold-search t
))
1059 (if (save-excursion (beginning-of-line)
1060 (skip-chars-forward " \t0-9")
1061 (looking-at "end[ \t]*do\\b"))
1067 (while (and (not (= count
0))
1068 (not (eq (fortran-next-statement) 'last-statement
))
1069 ;; Keep local to subprogram
1070 (not (and (looking-at fortran-end-prog-re
)
1071 (fortran-check-end-prog-re))))
1072 (skip-chars-forward " \t0-9")
1073 (cond ((looking-at "end[ \t]*do\\b")
1074 (setq count
(1- count
)))
1076 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
1077 (setq count
(+ count
1)))))
1079 ;; All pairs accounted for.
1082 (defun fortran-beginning-do ()
1083 "Search backwards for first unmatched DO [WHILE].
1084 Return point or nil."
1085 (let ((case-fold-search t
))
1088 (skip-chars-forward " \t0-9")
1089 (looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+"))
1095 (while (and (not (= count
0))
1096 (not (eq (fortran-previous-statement) 'first-statement
))
1097 ;; Keep local to subprogram
1098 (not (and (looking-at fortran-end-prog-re
)
1099 (fortran-check-end-prog-re))))
1100 (skip-chars-forward " \t0-9")
1102 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
1103 (setq count
(1- count
)))
1104 ((looking-at "end[ \t]*do\\b")
1105 (setq count
(1+ count
)))))
1107 ;; All pairs accounted for.
1110 (defun fortran-mark-if ()
1111 "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
1112 The marks are pushed."
1114 (let (endif-point if-point
)
1115 (if (setq endif-point
(fortran-end-if))
1116 (if (not (setq if-point
(fortran-beginning-if)))
1117 (message "No matching if.")
1118 ;; Set mark, move point.
1119 (goto-char endif-point
)
1121 (goto-char if-point
)))))
1123 (defvar fortran-if-start-re
"\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
1125 (defun fortran-end-if ()
1126 "Search forwards for first unmatched ENDIF.
1127 Return point or nil."
1128 (let ((case-fold-search t
))
1129 (if (save-excursion (beginning-of-line)
1130 (skip-chars-forward " \t0-9")
1131 (looking-at "end[ \t]*if\\b"))
1134 ;; Search for one. The point has been already been moved to first
1135 ;; letter on line but this should not cause troubles.
1138 (while (and (not (= count
0))
1139 (not (eq (fortran-next-statement) 'last-statement
))
1140 ;; Keep local to subprogram.
1141 (not (and (looking-at fortran-end-prog-re
)
1142 (fortran-check-end-prog-re))))
1143 (skip-chars-forward " \t0-9")
1144 (cond ((looking-at "end[ \t]*if\\b")
1145 (setq count
(- count
1)))
1146 ((looking-at fortran-if-start-re
)
1149 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1150 (let (then-test) ; Multi-line if-then.
1153 (= (forward-line 1) 0)
1154 ;; Search forward for then.
1155 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1159 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1161 (setq count
(+ count
1)))))))
1163 ;; All pairs accounted for.
1166 (defun fortran-beginning-if ()
1167 "Search backwards for first unmatched IF-THEN.
1168 Return point or nil."
1169 (let ((case-fold-search t
))
1171 ;; May be sitting on multi-line if-then statement, first
1172 ;; move to beginning of current statement. Note:
1173 ;; `fortran-previous-statement' moves to previous statement
1174 ;; *unless* current statement is first one. Only move
1175 ;; forward if not first-statement.
1176 (if (not (eq (fortran-previous-statement) 'first-statement
))
1177 (fortran-next-statement))
1178 (skip-chars-forward " \t0-9")
1180 (looking-at fortran-if-start-re
)
1182 (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1183 ;; Multi-line if-then.
1186 (and (= (forward-line 1) 0)
1187 ;; Search forward for then.
1188 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1192 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1199 (while (and (not (= count
0))
1200 (not (eq (fortran-previous-statement) 'first-statement
))
1201 ;; Keep local to subprogram.
1202 (not (and (looking-at fortran-end-prog-re
)
1203 (fortran-check-end-prog-re))))
1204 (skip-chars-forward " \t0-9")
1205 (cond ((looking-at fortran-if-start-re
)
1208 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1209 (let (then-test) ; Multi-line if-then.
1212 (= (forward-line 1) 0)
1213 ;; Search forward for then.
1214 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1218 (concat ".*then\\b[ \t]*"
1219 "[^ \t(=a-z[0-9]]"))))))
1221 (setq count
(- count
1)))))
1222 ((looking-at "end[ \t]*if\\b")
1223 (setq count
(+ count
1)))))
1225 ;; All pairs accounted for.
1228 (defun fortran-indent-line ()
1229 "Indent current Fortran line based on its contents and on previous lines."
1231 (let ((cfi (fortran-calculate-indent)))
1234 (if (or (not (= cfi
(fortran-current-line-indentation)))
1235 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t
)
1236 (not (fortran-line-number-indented-correctly-p))))
1237 (fortran-indent-to-column cfi
)
1239 (if (and (not (looking-at fortran-comment-line-start-skip
))
1240 (fortran-find-comment-start-skip))
1241 (fortran-indent-comment))))
1242 ;; Never leave point in left margin.
1243 (if (< (current-column) cfi
)
1244 (move-to-column cfi
))
1245 (if (and auto-fill-function
1246 (> (save-excursion (end-of-line) (current-column))
1251 (if fortran-blink-matching-if
1253 (fortran-blink-matching-if)
1254 (fortran-blink-matching-do)))))
1256 (defun fortran-auto-fill ()
1257 (if (> (current-column) (current-fill-column))
1258 (let ((cfi (fortran-calculate-indent)))
1261 (if (or (not (= cfi
(fortran-current-line-indentation)))
1262 (and (re-search-forward "^[ \t]*[0-9]+"
1264 (not (fortran-line-number-indented-correctly-p))))
1265 (fortran-indent-to-column cfi
)
1267 (if (and (not (looking-at fortran-comment-line-start-skip
))
1268 (fortran-find-comment-start-skip))
1269 (fortran-indent-comment))))
1271 ;; Never leave point in left margin.
1272 (if (< (current-column) cfi
)
1273 (move-to-column cfi
)))))
1275 ;; Historically this was a separate function which advertised itself
1276 ;; as reindenting but only did so where `most likely to be necessary'.
1277 (defalias 'fortran-indent-new-line
'reindent-then-newline-and-indent
)
1279 (defun fortran-indent-subprogram ()
1280 "Properly indent the Fortran subprogram which contains point."
1284 (message "Indenting subprogram...")
1285 (indent-region (point) (mark) nil
))
1286 (message "Indenting subprogram...done."))
1288 (defun fortran-calculate-indent ()
1289 "Calculates the Fortran indent column based on previous lines."
1290 (let (icol first-statement
(case-fold-search t
)
1291 (fortran-minimum-statement-indent
1292 (if indent-tabs-mode
1293 fortran-minimum-statement-indent-tab
1294 fortran-minimum-statement-indent-fixed
)))
1296 (setq first-statement
(fortran-previous-statement))
1298 (setq icol fortran-minimum-statement-indent
)
1300 (if (= (point) (point-min))
1301 (setq icol fortran-minimum-statement-indent
)
1302 (setq icol
(fortran-current-line-indentation)))
1303 (skip-chars-forward " \t0-9")
1304 (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
1305 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
1306 (let (then-test) ;multi-line if-then
1307 (while (and (= (forward-line 1) 0)
1308 ;;search forward for then
1309 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1310 (not (setq then-test
1313 *[^ \t_$(=a-z0-9]")))))
1315 (setq icol
(+ icol fortran-if-indent
))))
1316 ((looking-at "else\\(if\\)?\\b")
1317 (setq icol
(+ icol fortran-if-indent
)))
1318 ((looking-at "select[ \t]*case[ \t](.*)")
1319 (setq icol
(+ icol fortran-if-indent
)))
1320 ((looking-at "case[ \t]*(.*)")
1321 (setq icol
(+ icol fortran-if-indent
)))
1322 ((looking-at "case[ \t]*default\\b")
1323 (setq icol
(+ icol fortran-if-indent
)))
1324 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1325 (setq icol
(+ icol fortran-if-indent
)))
1326 ((looking-at "where[ \t]*(.*)[ \t]*\n")
1327 (setq icol
(+ icol fortran-if-indent
)))
1328 ((looking-at "do\\b")
1329 (setq icol
(+ icol fortran-do-indent
)))
1331 "\\(structure\\|union\\|map\\|interface\\)\
1332 \\b[ \t]*[^ \t=(a-z]")
1333 (setq icol
(+ icol fortran-structure-indent
)))
1334 ((and (looking-at fortran-end-prog-re1
)
1335 (fortran-check-end-prog-re))
1336 ;; Previous END resets indent to minimum
1337 (setq icol fortran-minimum-statement-indent
))))))
1340 (cond ((looking-at "[ \t]*$"))
1341 ((looking-at fortran-comment-line-start-skip
)
1342 (cond ((eq fortran-comment-indent-style
'relative
)
1343 (setq icol
(+ icol fortran-comment-line-extra-indent
)))
1344 ((eq fortran-comment-indent-style
'fixed
)
1345 (setq icol
(+ fortran-minimum-statement-indent
1346 fortran-comment-line-extra-indent
))))
1347 (setq fortran-minimum-statement-indent
0))
1348 ((or (looking-at (concat "[ \t]*"
1350 fortran-continuation-string
)))
1351 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1352 (setq icol
(+ icol fortran-continuation-indent
)))
1353 ((looking-at "[ \t]*#") ; Check for cpp directive.
1354 (setq fortran-minimum-statement-indent
0 icol
0))
1356 ((and fortran-check-all-num-for-matching-do
1357 (looking-at "[ \t]*[0-9]+")
1358 (fortran-check-for-matching-do))
1359 (setq icol
(- icol fortran-do-indent
)))
1361 (skip-chars-forward " \t0-9")
1362 (cond ((looking-at "end[ \t]*\\(if\\|select\\|where\\)\\b")
1363 (setq icol
(- icol fortran-if-indent
)))
1364 ((looking-at "else\\(if\\)?\\b")
1365 (setq icol
(- icol fortran-if-indent
)))
1366 ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
1367 (setq icol
(- icol fortran-if-indent
)))
1368 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1369 (setq icol
(- icol fortran-if-indent
)))
1370 ((and (looking-at "continue\\b")
1371 (fortran-check-for-matching-do))
1372 (setq icol
(- icol fortran-do-indent
)))
1373 ((looking-at "end[ \t]*do\\b")
1374 (setq icol
(- icol fortran-do-indent
)))
1375 ((looking-at "end[ \t]*\
1376 \\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1377 (setq icol
(- icol fortran-structure-indent
)))
1378 ((and (looking-at fortran-end-prog-re1
)
1379 (fortran-check-end-prog-re)
1380 (not (= icol fortran-minimum-statement-indent
)))
1381 (message "Warning: `end' not in column %d. Probably\
1382 an unclosed block." fortran-minimum-statement-indent
))))))
1383 (max fortran-minimum-statement-indent icol
)))
1385 (defun fortran-current-line-indentation ()
1386 "Indentation of current line, ignoring Fortran line number or continuation.
1387 This is the column position of the first non-whitespace character
1388 aside from the line number and/or column 5/8 line-continuation character.
1389 For comment lines, returns indentation of the first
1390 non-indentation text within the comment."
1393 (cond ((looking-at fortran-comment-line-start-skip
)
1394 (goto-char (match-end 0))
1396 (if (stringp fortran-comment-indent-char
)
1397 fortran-comment-indent-char
1398 (char-to-string fortran-comment-indent-char
))))
1399 ((or (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1400 (goto-char (match-end 0)))
1402 ;; Move past line number.
1403 (skip-chars-forward "[ \t0-9]")))
1404 ;; Move past whitespace.
1405 (skip-chars-forward " \t")
1408 (defun fortran-indent-to-column (col)
1409 "Indent current line with spaces to column COL.
1410 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
1411 line, and this continuation character is retained on indentation;
1412 2) If `fortran-continuation-string' is the first non-whitespace
1413 character, this is a continuation line;
1414 3) A non-continuation line which has a number as the first
1415 non-whitespace character is a numbered line.
1416 4) A TAB followed by a digit indicates a continuation line."
1419 (if (looking-at fortran-comment-line-start-skip
)
1420 (if fortran-comment-indent-style
1421 (let* ((char (if (stringp fortran-comment-indent-char
)
1422 (aref fortran-comment-indent-char
0)
1423 fortran-comment-indent-char
))
1424 (chars (string ? ?
\t char
)))
1425 (goto-char (match-end 0))
1426 (skip-chars-backward chars
)
1427 (delete-region (point) (progn (skip-chars-forward chars
)
1429 (insert-char char
(- col
(current-column)))))
1430 (if (looking-at "\t[1-9]")
1431 (if indent-tabs-mode
1432 (goto-char (match-end 0))
1435 (insert fortran-continuation-string
))
1436 (if (looking-at " \\{5\\}[^ 0\n]")
1437 (if indent-tabs-mode
1438 (progn (delete-char 6)
1439 (insert ?
\t (fortran-numerical-continuation-char) 1))
1441 (delete-horizontal-space)
1442 ;; Put line number in columns 0-4
1443 ;; or put continuation character in column 5.
1445 ((looking-at (regexp-quote fortran-continuation-string
))
1446 (if indent-tabs-mode
1449 (if indent-tabs-mode
1450 fortran-minimum-statement-indent-tab
1451 fortran-minimum-statement-indent-fixed
))
1453 (insert-char (fortran-numerical-continuation-char) 1))
1456 ((looking-at "[0-9]+")
1457 (let ((extra-space (- 5 (- (match-end 0) (point)))))
1458 (if (< extra-space
0)
1459 (message "Warning: line number exceeds 5-digit limit.")
1460 (indent-to (min fortran-line-number-indent extra-space
))))
1461 (skip-chars-forward "0-9")))))
1462 ;; Point is now after any continuation character or line number.
1463 ;; Put body of statement where specified.
1464 (delete-horizontal-space)
1466 ;; Indent any comment following code on the same line.
1467 (if (and comment-start-skip
1468 (fortran-find-comment-start-skip))
1469 (progn (goto-char (match-beginning 0))
1470 (if (not (= (current-column)
1471 (fortran-comment-indent)))
1472 (progn (delete-horizontal-space)
1473 (indent-to (fortran-comment-indent)))))))))
1475 (defun fortran-line-number-indented-correctly-p ()
1476 "Return t if current line's line number is correctly indented.
1477 Do not call if there is no line number."
1480 (skip-chars-forward " \t")
1481 (and (<= (current-column) fortran-line-number-indent
)
1482 (or (= (current-column) fortran-line-number-indent
)
1483 (progn (skip-chars-forward "0-9")
1484 (= (current-column) 5))))))
1486 (defun fortran-check-for-matching-do ()
1487 "When called from a numbered statement, return t if matching DO is found.
1488 Otherwise return nil."
1489 (let ((case-fold-search t
)
1493 (if (looking-at "[ \t]*[0-9]+")
1495 (skip-chars-forward " \t")
1496 (skip-chars-forward "0") ;skip past leading zeros
1498 (buffer-substring (point) (progn
1499 (skip-chars-forward "0-9")
1505 (and (re-search-backward
1507 "\\(^[ \t0-9]*do[ \t]*0*"
1508 charnum
"\\b\\)\\|" "\\(^[ \t]*0*"
1512 (concat "^[ \t0-9]*do[ \t]*0*"
1515 (defun fortran-find-comment-start-skip ()
1516 "Move to past `comment-start-skip' found on current line.
1517 Return t if `comment-start-skip' found, nil if not."
1518 ;; In order to move point only if comment-start-skip is found, this
1519 ;; one uses a lot of save-excursions. Note that re-search-forward
1520 ;; moves point even if comment-start-skip is inside a string-constant.
1521 ;; Some code expects certain values for match-beginning and end.
1523 (if (and comment-start-skip
1525 (re-search-forward comment-start-skip
(line-end-position) t
)))
1526 (let ((save-match-beginning (match-beginning 0))
1527 (save-match-end (match-end 0)))
1528 (if (fortran-is-in-string-p (match-beginning 0))
1530 (goto-char save-match-end
)
1531 (fortran-find-comment-start-skip)) ; recurse for rest of line
1532 (goto-char save-match-beginning
)
1533 (re-search-forward comment-start-skip
(line-end-position) t
)
1534 (goto-char (match-end 0))
1537 ;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1538 ;; Test if TAB format continuation lines work.
1539 (defun fortran-is-in-string-p (where)
1540 "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
1544 ((bolp) nil
) ; bol is never inside a string
1545 ((save-excursion ; comment lines too
1547 (looking-at fortran-comment-line-start-skip
)) nil
)
1548 (t (let (;; ok, serious now. Init some local vars:
1549 (parse-state '(0 nil nil nil nil nil
0))
1550 (quoted-comment-start (if comment-start
1551 (regexp-quote comment-start
)))
1553 parse-limit end-of-line
)
1554 ;; move to start of current statement
1555 (fortran-next-statement)
1556 (fortran-previous-statement)
1557 ;; now parse up to WHERE
1559 (if (or ;; skip to next line if:
1561 (looking-at fortran-comment-line-start-skip
)
1562 ;; - at end of line?
1564 ;; - not in a string and after comment-start?
1565 (and (not (nth 3 parse-state
))
1567 (equal comment-start
1568 (char-to-string (preceding-char)))))
1569 (if (> (forward-line) 0)
1570 (setq not-done nil
))
1572 ;; if we are at beginning of code line, skip any
1573 ;; whitespace, labels and tab continuation markers.
1574 (if (bolp) (skip-chars-forward " \t0-9"))
1575 ;; if we are in column <= 5 now, check for continuation char
1576 (cond ((= 5 (current-column)) (forward-char 1))
1577 ((and (< (current-column) 5)
1578 (equal fortran-continuation-string
1579 (char-to-string (following-char)))
1581 ;; find out parse-limit from here
1582 (setq end-of-line
(line-end-position))
1583 (setq parse-limit
(min where end-of-line
))
1584 ;; parse max up to comment-start, if non-nil and in current line
1587 (if (re-search-forward quoted-comment-start end-of-line t
)
1588 (setq parse-limit
(min (point) parse-limit
)))))
1589 ;; now parse if still in limits
1590 (if (< (point) where
)
1591 (setq parse-state
(parse-partial-sexp
1592 (point) parse-limit nil nil parse-state
))
1593 (setq not-done nil
))))
1595 (nth 3 parse-state
))))))
1597 (defun fortran-auto-fill-mode (arg)
1598 "Toggle fortran-auto-fill mode.
1599 With ARG, turn `fortran-auto-fill' mode on iff ARG is positive.
1600 In `fortran-auto-fill' mode, inserting a space at a column beyond `fill-column'
1601 automatically breaks the line at a previous space."
1603 (prog1 (setq auto-fill-function
1605 (not auto-fill-function
)
1606 (> (prefix-numeric-value arg
) 0))
1609 (force-mode-line-update)))
1611 (defun fortran-fill ()
1612 (let* ((auto-fill-function #'fortran-auto-fill
)
1614 (bol (line-beginning-position))
1615 (eol (line-end-position))
1616 (bos (min eol
(+ bol
(fortran-current-line-indentation))))
1620 (if (looking-at fortran-comment-line-start-skip
)
1621 nil
; OK to break quotes on comment lines.
1622 (move-to-column fill-column
)
1623 (if (fortran-is-in-string-p (point))
1624 (save-excursion (re-search-backward "\\S\"\\s\"\\S\"" bol t
)
1625 (if fortran-break-before-delimiters
1628 ;; decide where to split the line. If a position for a quoted
1629 ;; string was found above then use that, else break the line
1630 ;; before the last delimiter.
1631 ;; Delimiters are whitespace, commas, and operators.
1632 ;; Will break before a pair of *'s.
1636 (move-to-column (1+ fill-column
))
1637 (skip-chars-backward "^ \t\n,'+-/*=)"
1638 ;;; (if fortran-break-before-delimiters
1639 ;;; "^ \t\n,'+-/*=" "^ \t\n,'+-/*=)")
1641 (if (<= (point) (1+ bos
))
1643 (move-to-column (1+ fill-column
))
1644 ;;what is this doing???
1645 (if (not (re-search-forward "[\t\n,'+-/*)=]" eol t
))
1648 (re-search-forward "[ \t]" opoint t
)
1650 (if (looking-at "\\s\"")
1652 (skip-chars-backward " \t\*")))
1653 (if fortran-break-before-delimiters
1656 ;; if we are in an in-line comment, don't break unless the
1657 ;; line of code is longer than it should be. Otherwise
1658 ;; break the line at the column computed above.
1660 ;; Need to use fortran-find-comment-start-skip to make sure that quoted !'s
1661 ;; don't prevent a break.
1662 (if (not (or (save-excursion
1663 (if (and comment-start-skip
1664 (re-search-backward comment-start-skip bol t
)
1665 (not (fortran-is-in-string-p (point))))
1667 (skip-chars-backward " \t")
1668 (< (current-column) (1+ fill-column
)))))
1670 (goto-char fill-point
)
1672 (when (> (save-excursion
1675 (min (1+ fill-column
)
1676 (+ (fortran-calculate-indent)
1677 fortran-continuation-indent
)))
1678 (goto-char fill-point
)
1679 (fortran-break-line)
1682 (defun fortran-break-line ()
1683 (let ((opoint (point))
1684 (bol (line-beginning-position))
1685 (eol (line-end-position))
1686 (comment-string nil
))
1688 (if (and comment-start-skip
(fortran-find-comment-start-skip))
1690 (re-search-backward comment-start-skip bol t
)
1691 (setq comment-string
(buffer-substring (point) eol
))
1692 (delete-region (point) eol
))))
1693 ;; Forward line 1 really needs to go to next non white line
1694 (if (save-excursion (forward-line)
1695 (or (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")))
1698 (delete-region (point) (match-end 0))
1699 (delete-horizontal-space)
1701 (fortran-split-line))
1706 (delete-horizontal-space)
1707 (indent-to (fortran-comment-indent))
1708 (insert comment-string
)))))
1710 (defun fortran-analyze-file-format ()
1711 "Return nil if fixed format is used, t if TAB formatting is used.
1712 Use `fortran-tab-mode-default' if no non-comment statements are found in the
1713 file before the end or the first `fortran-analyze-depth' lines."
1716 (goto-char (point-min))
1720 (eq (char-after) ?
\t)
1721 (looking-at " \\{6\\}")
1722 (> i fortran-analyze-depth
)))
1726 ((eq (char-after) ?
\t) t
)
1727 ((looking-at " \\{6\\}") nil
)
1728 (fortran-tab-mode-default t
)
1731 (or (assq 'fortran-tab-mode-string minor-mode-alist
)
1732 (setq minor-mode-alist
(cons
1733 '(fortran-tab-mode-string
1734 (indent-tabs-mode fortran-tab-mode-string
))
1737 (defun fortran-fill-paragraph (&optional justify
)
1738 "Fill surrounding comment block as paragraphs, else fill statement.
1739 Intended as the value of `fill-paragraph-function'."
1743 (if (not (looking-at fortran-comment-line-start-skip
))
1744 (fortran-fill-statement)
1745 ;; We're in a comment block. Find the start and end of a
1746 ;; paragraph, delimited either by non-comment lines or empty
1747 ;; comments. (Get positions as markers, since the
1748 ;; `indent-region' below can shift the block's end).
1749 (let* ((non-empty-comment
1750 (concat "\\(" fortran-comment-line-start-skip
"\\)"
1752 (start (save-excursion
1753 ;; Find (start of) first line.
1754 (while (and (zerop (forward-line -
1))
1755 (looking-at non-empty-comment
)))
1756 (or (looking-at non-empty-comment
)
1757 (forward-line)) ; overshot
1759 (end (save-excursion
1760 ;; Find start of first line past region to fill.
1763 (looking-at non-empty-comment
)))
1765 ;; Indent the block, find the string comprising the effective
1766 ;; comment start skip and use that as a fill-prefix for
1767 ;; filling the region.
1768 (indent-region start end nil
)
1769 (let ((paragraph-ignore-fill-prefix nil
)
1772 (looking-at fortran-comment-line-start-skip
)
1774 (let (fill-paragraph-function)
1775 (fill-region start end justify
))) ; with normal `fill-paragraph'
1776 (set-marker start nil
)
1777 (set-marker end nil
))))
1780 (defun fortran-fill-statement ()
1781 "Fill a fortran statement up to `fill-column'."
1783 (let ((auto-fill-function #'fortran-auto-fill
))
1784 (if (not (save-excursion
1786 (or (looking-at "[ \t]*$")
1787 (looking-at fortran-comment-line-start-skip
)
1788 (and comment-start-skip
1789 (looking-at (concat "[ \t]*"
1790 comment-start-skip
))))))
1792 ;; Find beginning of statement.
1793 (fortran-next-statement)
1794 (fortran-previous-statement)
1795 ;; Re-indent initially.
1796 (fortran-indent-line)
1797 ;; Replace newline plus continuation field plus indentation with
1801 (fortran-remove-continuation)))
1802 (fortran-previous-statement)))
1803 (fortran-indent-line)))
1805 (defun fortran-strip-sqeuence-nos (do-space)
1806 "Delete all text after column 72 (assumed to be sequence numbers).
1807 Also delete trailing whitespace after stripping such text. Supplying
1808 prefix arg DO-SPACE prevent stripping the whitespace."
1811 (goto-char (point-min))
1812 (while (re-search-forward (concat "^" (make-string 72 ?.
)" \\(.*\\)")
1814 (replace-match "" nil nil nil
1)
1815 (unless do-space
(delete-horizontal-space)))))
1817 ;; This code used to live in add-log.el, but this is a better place
1819 (defun fortran-current-defun ()
1820 "Function to use for `add-log-current-defun-function' in Fortran mode."
1821 ;; We must be inside function body for this to work.
1822 (fortran-beginning-of-subprogram)
1823 (let ((case-fold-search t
)) ; case-insensitive
1824 ;; search for fortran subprogram start
1825 (if (re-search-forward
1826 (concat "^[ \t]*\\(program\\|subroutine\\|function"
1827 "\\|[ \ta-z0-9*()]*[ \t]+function\\|"
1828 "\\(block[ \t]*data\\)\\)")
1829 (save-excursion (fortran-end-of-subprogram)
1832 (or (match-string-no-properties 2)
1834 ;; move to EOL or before first left paren
1835 (if (re-search-forward "[(\n]" nil t
)
1836 (progn (backward-char)
1837 (skip-chars-backward " \t"))
1839 ;; Use the name preceding that.
1840 (buffer-substring-no-properties (point) (progn (backward-sexp)
1846 ;;; fortran.el ends here