1 ;;; fortran.el --- Fortran mode for GNU Emacs
3 ;; Copyright (C) 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
4 ;; 2003, 2004, 2005 Free Software Foundation, Inc.
6 ;; Author: Michael D. Prange <prange@erl.mit.edu>
7 ;; Maintainer: Glenn Morris <gmorris@ast.cam.ac.uk>
8 ;; Keywords: fortran, languages
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'
33 ;; (f90.el). It is meant to support the GNU Fortran language
34 ;; implemented by g77 (its extensions to Fortran77 and
35 ;; interpretations, e.g. of blackslash in strings).
39 ;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
41 ;; We acknowledge many contributions and valuable suggestions by
42 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
43 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
44 ;; Gary Sabot and Richard Stallman.
50 ;; * Tidy it all up (more)!
51 ;; * Implement insertion and removal of statement continuations in
52 ;; mixed f77/f90 style, with the first `&' past column 72 and the
53 ;; second in column 6.
54 ;; * Support any other extensions to f77 grokked by GNU Fortran I've missed.
56 (eval-when-compile ; silence compiler
57 (defvar dabbrev-case-fold-search)
58 (defvar imenu-case-fold-search)
59 (defvar imenu-syntax-alist))
63 "Major mode for editing fixed format Fortran code."
64 :link '(custom-manual "(emacs)Fortran")
67 (defgroup fortran-indent nil
68 "Indentation variables in Fortran mode."
72 (defgroup fortran-comment nil
73 "Comment-handling variables in Fortran mode."
79 (defcustom fortran-tab-mode-default nil
80 "*Default tabbing/carriage control style for empty files in Fortran mode.
81 A non-nil value specifies tab-digit style of continuation control.
82 A value of nil specifies that continuation lines are marked
83 with a character in column 6."
85 :group 'fortran-indent)
87 (defcustom fortran-tab-mode-string "/t"
88 "*String to appear in mode line in TAB format buffers."
90 :group 'fortran-indent)
92 (defcustom fortran-do-indent 3
93 "*Extra indentation applied to DO blocks."
95 :group 'fortran-indent)
97 (defcustom fortran-if-indent 3
98 "*Extra indentation applied to IF, SELECT CASE and WHERE blocks."
100 :group 'fortran-indent)
102 (defcustom fortran-structure-indent 3
103 "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
105 :group 'fortran-indent)
107 (defcustom fortran-continuation-indent 5
108 "*Extra indentation applied to continuation lines."
110 :group 'fortran-indent)
112 (defcustom fortran-comment-indent-style 'fixed
113 "*How to indent comments.
114 nil forces comment lines not to be touched;
115 `fixed' indents to `fortran-comment-line-extra-indent' columns beyond
116 `fortran-minimum-statement-indent-fixed' (if `indent-tabs-mode' nil), or
117 `fortran-minimum-statement-indent-tab' (if `indent-tabs-mode' non-nil);
118 `relative' indents to current Fortran indentation plus
119 `fortran-comment-line-extra-indent'."
120 :type '(radio (const :tag "Untouched" nil) (const fixed) (const relative))
121 :group 'fortran-indent)
123 (defcustom fortran-comment-line-extra-indent 0
124 "*Amount of extra indentation for text within full-line comments."
126 :group 'fortran-indent
127 :group 'fortran-comment)
129 (defcustom fortran-comment-line-start "C"
130 "*Delimiter inserted to start new full-line comment.
131 You might want to change this to \"*\", for instance."
134 :group 'fortran-comment)
136 ;; This used to match preprocessor lines too, but that messes up
137 ;; filling and doesn't seem to be necessary.
138 (defcustom fortran-comment-line-start-skip
139 "^[CcDd*!]\\(\\([^ \t\n]\\)\\2+\\)?[ \t]*"
140 "*Regexp to match the start of a full-line comment."
143 :group 'fortran-comment)
145 (defcustom fortran-directive-re
147 "*Regexp to match a directive line.
148 The matching text will be fontified with `font-lock-keyword-face'.
149 The matching line will be given zero indentation."
152 :group 'fortran-indent)
154 (defcustom fortran-minimum-statement-indent-fixed 6
155 "*Minimum statement indentation for fixed format continuation style."
157 :group 'fortran-indent)
159 (defcustom fortran-minimum-statement-indent-tab (max tab-width 6)
160 "*Minimum statement indentation for TAB format continuation style."
162 :group 'fortran-indent)
164 ;; Note that this is documented in the v18 manuals as being a string
165 ;; of length one rather than a single character.
166 ;; The code in this file accepts either format for compatibility.
167 (defcustom fortran-comment-indent-char " "
168 "*Single-character string inserted for Fortran comment indentation.
171 :group 'fortran-comment)
173 (defcustom fortran-line-number-indent 1
174 "*Maximum indentation for Fortran line numbers.
175 5 means right-justify them within their five-column field."
177 :group 'fortran-indent)
179 (defcustom fortran-check-all-num-for-matching-do nil
180 "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
184 (defcustom fortran-blink-matching-if nil
185 "*Non-nil causes \\[fortran-indent-line] on ENDIF to blink on matching IF.
186 Also, from an ENDDO statement blink on matching DO [WHILE] statement."
190 (defcustom fortran-continuation-string "$"
191 "*Single-character string used for Fortran continuation lines.
192 In fixed format continuation style, this character is inserted in
193 column 6 by \\[fortran-split-line] to begin a continuation line.
194 Also, if \\[fortran-indent-line] finds this at the beginning of a
195 line, it will convert the line into a continuation line of the
196 appropriate style. Normally $."
200 (defcustom fortran-comment-region "c$$$"
201 "*String inserted by \\[fortran-comment-region] at start of each \
204 :group 'fortran-comment)
206 (defcustom fortran-electric-line-number t
207 "*Non-nil causes line numbers to be moved to the correct column as typed."
211 (defcustom fortran-column-ruler-fixed
212 "0 4 6 10 20 30 40 5\
214 \[ ]|{ | | | | | | | | \
216 "String displayed above current line by \\[fortran-column-ruler].
217 This variable is used in fixed format mode.
218 See the variable `fortran-column-ruler-tab' for TAB format mode."
222 (defcustom fortran-column-ruler-tab
225 \[ ]| { | | | | | | | | \
227 "String displayed above current line by \\[fortran-column-ruler].
228 This variable is used in TAB format mode.
229 See the variable `fortran-column-ruler-fixed' for fixed format mode."
233 (defcustom fortran-analyze-depth 100
234 "Number of lines to scan to identify fixed or TAB format style."
238 (defcustom fortran-break-before-delimiters t
239 "*Non-nil causes filling to break lines before delimiters.
240 Delimiters are characters matching the regexp `fortran-break-delimiters-re'."
244 (defconst fortran-break-delimiters-re "[-+*/><=, \t]"
245 "Regexp matching delimiter characters at which lines may be broken.
246 There are certain tokens comprised entirely of characters
247 matching this regexp that should not be split, and these are
248 specified by the constant `fortran-no-break-re'.")
250 ;; The ">=", etc F77 extensions are supported by g77.
251 (defconst fortran-no-break-re
252 (regexp-opt '("**" "//" "=>" ">=" "<=" "==" "/=") 'paren)
253 "Regexp specifying where not to break lines when filling.
254 This regexp matches certain tokens comprised entirely of
255 characters matching the regexp `fortran-break-delimiters-re' that should
256 not be split by filling. Each element is assumed to be two
259 (defcustom fortran-mode-hook nil
260 "Hook run when entering Fortran mode."
265 (defvar fortran-if-start-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*("
266 "Regexp matching the start of an IF statement.")
268 (defvar fortran-end-prog-re1
270 \\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
271 \\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?"
272 "Regexp possibly matching the end of a subprogram.")
274 (defvar fortran-end-prog-re
275 (concat "^[ \t0-9]*" fortran-end-prog-re1)
276 "Regexp possibly matching the end of a subprogram, from the line start.
277 See also `fortran-end-prog-re1'.")
279 (defconst fortran-type-types
281 (mapconcat 'identity ; " " -> "[ \t]*"
285 '("character" "byte" "integer" "logical"
286 "none" "real" "complex"
287 "double precision" "double complex"))
288 (structured-types '("structure" "union" "map"))
289 (other-types '("record" "dimension"
290 "parameter" "common" "save"
291 "external" "intrinsic" "data"
294 (mapcar (lambda (x) (concat "implicit " x))
297 (mapcar (lambda (x) (concat "end " x))
300 other-types)) 'paren))
302 "Regexp matching Fortran types.")
304 (defvar fortran-font-lock-keywords-1
305 ;; Program, subroutine and function declarations, plus calls.
306 '(("\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|\
307 program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?"
308 (1 font-lock-keyword-face)
309 (2 font-lock-function-name-face nil t)))
310 "Subdued level highlighting for Fortran mode.")
312 (defvar fortran-font-lock-keywords-2
313 (append fortran-font-lock-keywords-1
315 ;; Fontify all type specifiers (must be first - see below).
316 (cons fortran-type-types 'font-lock-type-face)
317 ;; Builtin keywords (except logical, do and goto - see below).
318 (concat "\\<" (regexp-opt
319 '("continue" "format" "end" "enddo"
320 "if" "then" "else" "endif" "elseif"
321 "while" "inquire" "stop" "return"
322 "include" "open" "close" "read"
323 "write" "format" "print" "select" "case"
324 "cycle" "exit" "rewind" "backspace"
327 ;; Builtin operators.
328 (concat "\\." (regexp-opt
329 '("and" "or" "not" "lt" "le" "eq" "ge"
330 "gt" "ne" "true" "false")
332 ;; do/goto keywords and targets, and goto tags.
333 '("\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
334 (1 font-lock-keyword-face)
335 (2 font-lock-constant-face nil t))
336 '("^ *\\([0-9]+\\)" . font-lock-constant-face)))
337 "Medium level highlighting for Fortran mode.")
339 (defvar fortran-font-lock-keywords-3
341 fortran-font-lock-keywords-1
342 ;; All type specifiers plus their declared items.
344 (list (concat fortran-type-types "[ \t(/]*\\(*\\)?")
346 '(1 font-lock-type-face)
347 ;; Declaration item (or just /.../ block name).
348 `(font-lock-match-c-style-declaration-item-and-skip-to-next
349 ;; Start after any *(...) expression.
351 (and (match-beginning ,(1+ (regexp-opt-depth
352 fortran-type-types)))
356 ;; No need to clean up.
358 ;; Fontify as a variable name, functions fontified elsewhere.
359 (1 font-lock-variable-name-face nil t))))
360 ;; Things extra to `fortran-font-lock-keywords-3' (must be done first).
362 ;; Goto-like `err=label'/`end=label' in read/write statements.
363 '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
364 (1 font-lock-keyword-face) (4 font-lock-constant-face nil t))
365 ;; Standard continuation character and in a TAB-formatted line.
366 '("^ \\{5\\}\\([^ 0\n]\\)" 1 font-lock-string-face)
367 '("^\t\\([1-9]\\)" 1 font-lock-string-face))
368 `((,fortran-directive-re (0 font-lock-keyword-face t)))
369 ;; `fortran-font-lock-keywords-2' without types (see above).
370 (cdr (nthcdr (length fortran-font-lock-keywords-1)
371 fortran-font-lock-keywords-2)))
372 "Gaudy level highlighting for Fortran mode.")
374 (defvar fortran-font-lock-keywords-4
375 (append fortran-font-lock-keywords-3
379 '("int" "ifix" "idint" "real" "float" "sngl"
380 "dble" "cmplx" "ichar" "char" "aint" "dint"
381 "anint" "dnint" "nint" "idnint" "iabs" "abs"
382 "dabs" "cabs" "mod" "amod" "dmod" "isign"
383 "sign" "dsign" "idim" "dim" "ddim" "dprod"
384 "max" "max0" "amax1" "dmax1" "amax0" "max1"
385 "min0" "amin1" "dmin1" "amin0" "min1" "len"
386 "index" "lge" "lgt" "lle" "llt" "aimag"
387 "conjg" "sqrt" "dsqrt" "csqrt" "exp" "dexp"
388 "cexp" "log" "alog" "dlog" "clog" "log10"
389 "alog10" "dlog10" "sin" "dsin" "csin" "cos"
390 "dcos" "ccos" "tan" "dtan" "asin" "dasin"
391 "acos" "dacos" "atan" "datan" "atan2" "datan2"
392 "sinh" "dsinh" "cosh" "dcosh" "tanh" "dtanh")
393 'paren) "[ \t]*(") '(1 font-lock-builtin-face))))
394 "Maximum highlighting for Fortran mode.
395 Consists of level 3 plus all other intrinsics not already highlighted.")
397 ;; Comments are real pain in Fortran because there is no way to
398 ;; represent the standard comment syntax in an Emacs syntax table.
399 ;; (We can do so for F90-style). Therefore an unmatched quote in a
400 ;; standard comment will throw fontification off on the wrong track.
401 ;; So we do syntactic fontification with regexps.
402 (defvar fortran-font-lock-syntactic-keywords
403 '(("^[cd\\*]" 0 (11))
404 ("^[^cd\\*\t\n].\\{71\\}\\([^\n]+\\)" 1 (11)))
405 "`font-lock-syntactic-keywords' for Fortran.
406 These get fixed-format comments fontified.")
408 (defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
409 "Default expressions to highlight in Fortran mode.")
411 (defvar fortran-imenu-generic-expression
412 ;; These patterns could be confused by sequence nos. in cols 72+ and
413 ;; don't allow continuations everywhere.
417 ;; [This will be fooled by `end function' allowed by G77. Also,
418 ;; it assumes sensible whitespace is employed.]
420 ;; leading whitespace:
422 ;; function declaration with optional type, e.g. `real',
423 ;; `real*4', character(*), `double precision':
424 "\\(\\sw\\|\\s-\\|[*()+]\\)*"
425 "\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)"
426 ;; Possible statement continuation:
427 "[ \t" fortran-continuation-string "]+"
428 ;; Variable to index:
431 ;; Un-named block data.
432 '(nil "^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
433 "Value for `imenu-generic-expression' in Fortran mode.")
437 (defconst fortran-blocks-re
438 (concat "block[ \t]*data\\|select[ \t]*case\\|"
439 (regexp-opt '("do" "if" "interface" "function" "map" "program"
440 "structure" "subroutine" "union" "where")))
441 "Regexp potentially indicating the start or end of a Fortran \"block\".
442 Omits naked END statements, and DO-loops closed by anything other
445 (defconst fortran-end-block-re
446 ;; Do-loops terminated by things other than ENDDO cannot be handled
447 ;; with a regexp. This omission does not seem to matter to hideshow...
448 (concat "^[ \t0-9]*\\<end[ \t]*\\("
450 ;; Naked END statement.
452 "Regexp matching the end of a Fortran \"block\", from the line start.
453 Note that only ENDDO is handled for the end of a DO-loop. Used
454 in the Fortran entry in `hs-special-modes-alist'.")
456 (defconst fortran-start-block-re
458 "^[ \t0-9]*\\(" ; statement number
459 ;; Structure label for DO, IF, SELECT, WHERE.
460 "\\(\\(\\sw+[ \t]*:[ \t]*\\)?"
461 ;; IF blocks are a nuisance:
462 ;; IF ( ... ) foo is not a block, but a single statement.
463 ;; IF ( ... ) THEN can be split over multiple lines.
464 ;; [So can, eg, a DO WHILE (... ), but that is less common, I hope.]
465 ;; The regexp below allows for it to be split over at most 2 lines.
466 ;; That leads to the problem of not matching two consecutive IF
467 ;; statements as one, eg:
470 ;; It simply is not possible to do this in a 100% correct fashion
471 ;; using a regexp - see the functions fortran-end-if,
472 ;; fortran-beginning-if for the hoops we have to go through.
473 ;; An alternative is to match on THEN at a line end, eg:
474 ;; ".*)[ \t]*then[ \t]*\\($\\|!\\)"
475 ;; This would also match ELSE branches, though. This does not seem
476 ;; right to me, because then one has neighbouring blocks that are
477 ;; not nested in each other.
478 "\\(if[ \t]*(\\(.*\\|"
479 ".*\n\\([^if]*\\([^i].\\|.[^f]\\|.\\>\\)\\)\\)\\<then\\|"
480 "do\\|select[ \t]*case\\|where\\)\\)\\|"
481 (regexp-opt '("interface" "function" "map" "program"
482 "structure" "subroutine" "union"))
483 "\\|block[ \t]*data\\)[ \t]*")
484 "Regexp matching the start of a Fortran \"block\", from the line start.
485 A simple regexp cannot do this in fully correct fashion, so this
486 tries to strike a compromise between complexity and flexibility.
487 Used in the Fortran entry in `hs-special-modes-alist'.")
489 (add-to-list 'hs-special-modes-alist
490 `(fortran-mode ,fortran-start-block-re ,fortran-end-block-re
491 "^[cC*!]" fortran-end-of-block nil))
494 (defvar fortran-mode-syntax-table
495 (let ((table (make-syntax-table)))
496 ;; We might like `;' to be punctuation (g77 multi-statement
497 ;; lines), but that screws abbrevs.
498 (modify-syntax-entry ?\; "w" table)
499 (modify-syntax-entry ?\r " " table)
500 (modify-syntax-entry ?+ "." table)
501 (modify-syntax-entry ?- "." table)
502 (modify-syntax-entry ?= "." table)
503 (modify-syntax-entry ?* "." table)
504 (modify-syntax-entry ?/ "." table)
505 (modify-syntax-entry ?\' "\"" table)
506 (modify-syntax-entry ?\" "\"" table)
507 ;; Consistent with GNU Fortran's default -- see the manual.
508 ;; The F77 standard imposes no rule on this issue.
509 (modify-syntax-entry ?\\ "\\" table)
510 ;; This might be better as punctuation, as for C, but this way you
511 ;; can treat floating-point numbers as symbols.
512 (modify-syntax-entry ?. "_" table) ; e.g. `a.ne.b'
513 (modify-syntax-entry ?_ "_" table)
514 (modify-syntax-entry ?$ "_" table) ; esp. VMSisms
515 (modify-syntax-entry ?\! "<" table)
516 (modify-syntax-entry ?\n ">" table)
518 "Syntax table used in Fortran mode.")
520 (defvar fortran-gud-syntax-table
521 (let ((st (make-syntax-table fortran-mode-syntax-table)))
522 (modify-syntax-entry ?\n "." st)
524 "Syntax table used to parse Fortran expressions for printing in GUD.")
526 (defvar fortran-mode-map
527 (let ((map (make-sparse-keymap)))
528 (define-key map ";" 'fortran-abbrev-start)
529 (define-key map "\C-c;" 'fortran-comment-region)
530 (define-key map "\M-;" 'fortran-indent-comment)
531 (define-key map "\M-\n" 'fortran-split-line)
532 (define-key map "\M-\C-n" 'fortran-end-of-block)
533 (define-key map "\M-\C-p" 'fortran-beginning-of-block)
534 (define-key map "\M-\C-q" 'fortran-indent-subprogram)
535 (define-key map "\C-c\C-w" 'fortran-window-create-momentarily)
536 (define-key map "\C-c\C-r" 'fortran-column-ruler)
537 (define-key map "\C-c\C-p" 'fortran-previous-statement)
538 (define-key map "\C-c\C-n" 'fortran-next-statement)
539 (define-key map "\C-c\C-d" 'fortran-join-line) ; like f90
540 (define-key map "\M-^" 'fortran-join-line) ; subvert delete-indentation
541 (define-key map "0" 'fortran-electric-line-number)
542 (define-key map "1" 'fortran-electric-line-number)
543 (define-key map "2" 'fortran-electric-line-number)
544 (define-key map "3" 'fortran-electric-line-number)
545 (define-key map "4" 'fortran-electric-line-number)
546 (define-key map "5" 'fortran-electric-line-number)
547 (define-key map "6" 'fortran-electric-line-number)
548 (define-key map "7" 'fortran-electric-line-number)
549 (define-key map "8" 'fortran-electric-line-number)
550 (define-key map "9" 'fortran-electric-line-number)
552 (easy-menu-define fortran-menu map "Menu for Fortran mode."
554 ["Manual" (info "(emacs)Fortran")]
556 ,(custom-menu-create 'fortran)
558 ["Save" Custom-save t]
559 ["Reset to Current" Custom-reset-current t]
560 ["Reset to Saved" Custom-reset-saved t]
561 ["Reset to Standard Settings" Custom-reset-standard t]
564 ["Comment Region" fortran-comment-region mark-active]
566 (fortran-comment-region (region-beginning) (region-end) 1)
568 ["Indent Region" indent-region mark-active]
569 ["Indent Subprogram" fortran-indent-subprogram t]
571 ["Beginning of Subprogram" fortran-beginning-of-subprogram t]
572 ["End of Subprogram" fortran-end-of-subprogram t]
574 ["Subprogram" mark-defun t]
575 ["IF Block" fortran-mark-if t]
576 ["DO Block" fortran-mark-do t]
578 ["Narrow to Subprogram" narrow-to-defun t]
581 ["Temporary column ruler" fortran-column-ruler t]
582 ["72-column window" fortran-window-create t]
584 (enlarge-window-horizontally (- (frame-width) (window-width)))
585 (< (window-width) (frame-width))]
586 ["Momentary 72-column window" fortran-window-create-momentarily t]
588 ["Break Line at Point" fortran-split-line t]
589 ["Join Line" fortran-join-line t]
590 ["Fill Statement/Comment" fill-paragraph t]
592 ["Toggle auto-fill" auto-fill-mode :selected auto-fill-function
594 ["Toggle abbrev-mode" abbrev-mode :selected abbrev-mode
596 ["Add imenu Menu" imenu-add-menubar-index
597 :active (not (lookup-key (current-local-map) [menu-bar index]))
598 :included (fboundp 'imenu-add-to-menubar)]))
600 "Keymap used in Fortran mode.")
603 (defvar fortran-mode-abbrev-table
604 (let (abbrevs-changed)
605 (define-abbrev-table 'fortran-mode-abbrev-table nil)
606 ;; Use the 6th arg (SYSTEM-FLAG) of define-abbrev if possible.
607 ;; Only use `apply' to quieten the byte-compiler.
609 (function (lambda (element)
611 (apply 'define-abbrev fortran-mode-abbrev-table
612 (append element '(nil 0 t)))
613 (wrong-number-of-arguments
614 (apply 'define-abbrev fortran-mode-abbrev-table
615 (append element '(nil 0)))))))
616 '((";au" "automatic" )
618 (";bd" "block data" )
627 (";dc" "double complex" )
628 (";dp" "double precision" )
634 (";eq" "equivalence" )
643 (";ib" "implicit byte" )
644 (";ic" "implicit complex" )
645 (";ich" "implicit character")
646 (";ii" "implicit integer" )
647 (";il" "implicit logical" )
648 (";ir" "implicit real" )
651 (";intr" "intrinsic" )
654 (";o" "open" ) ; was ;op
668 (";su" "subroutine" )
674 fortran-mode-abbrev-table))
679 (defun fortran-mode ()
680 "Major mode for editing Fortran code in fixed format.
681 For free format code, use `f90-mode'.
683 \\[fortran-indent-line] indents the current Fortran line correctly.
684 Note that DO statements must not share a common CONTINUE.
686 Type ;? or ;\\[help-command] to display a list of built-in abbrevs for\
692 Variables controlling indentation style and extra features:
694 `fortran-comment-line-start'
695 To use comments starting with `!', set this to the string \"!\".
697 Extra indentation within DO blocks (default 3).
699 Extra indentation within IF blocks (default 3).
700 `fortran-structure-indent'
701 Extra indentation within STRUCTURE, UNION, MAP and INTERFACE blocks.
703 `fortran-continuation-indent'
704 Extra indentation applied to continuation statements (default 5).
705 `fortran-comment-line-extra-indent'
706 Amount of extra indentation for text in full-line comments (default 0).
707 `fortran-comment-indent-style'
708 How to indent the text in full-line comments. Allowed values are:
709 nil don't change the indentation
710 fixed indent to `fortran-comment-line-extra-indent' beyond the
712 `fortran-minimum-statement-indent-fixed' (fixed format) or
713 `fortran-minimum-statement-indent-tab' (TAB format),
714 depending on the continuation format in use.
715 relative indent to `fortran-comment-line-extra-indent' beyond the
716 indentation for a line of code.
718 `fortran-comment-indent-char'
719 Single-character string to be inserted instead of space for
720 full-line comment indentation (default \" \").
721 `fortran-minimum-statement-indent-fixed'
722 Minimum indentation for statements in fixed format mode (default 6).
723 `fortran-minimum-statement-indent-tab'
724 Minimum indentation for statements in TAB format mode (default 9).
725 `fortran-line-number-indent'
726 Maximum indentation for line numbers (default 1). A line number will
727 get less than this much indentation if necessary to avoid reaching
729 `fortran-check-all-num-for-matching-do'
730 Non-nil causes all numbered lines to be treated as possible \"continue\"
731 statements (default nil).
732 `fortran-blink-matching-if'
733 Non-nil causes \\[fortran-indent-line] on an ENDIF (or ENDDO) statement
734 to blink on the matching IF (or DO [WHILE]). (default nil)
735 `fortran-continuation-string'
736 Single-character string to be inserted in column 5 of a continuation
737 line (default \"$\").
738 `fortran-comment-region'
739 String inserted by \\[fortran-comment-region] at start of each line in
740 the region (default \"c$$$\").
741 `fortran-electric-line-number'
742 Non-nil causes line number digits to be moved to the correct column
743 as typed (default t).
744 `fortran-break-before-delimiters'
745 Non-nil causes lines to be broken before delimiters (default t).
747 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
748 with no args, if that value is non-nil."
750 (kill-all-local-variables)
751 (setq major-mode 'fortran-mode
753 local-abbrev-table fortran-mode-abbrev-table)
754 (set-syntax-table fortran-mode-syntax-table)
755 (use-local-map fortran-mode-map)
756 (set (make-local-variable 'indent-line-function) 'fortran-indent-line)
757 (set (make-local-variable 'indent-region-function)
759 (let (fortran-blink-matching-if ; avoid blinking delay
760 indent-region-function)
761 (indent-region start end nil))))
762 (set (make-local-variable 'require-final-newline) mode-require-final-newline)
763 ;; The syntax tables don't understand the column-0 comment-markers.
764 (set (make-local-variable 'comment-use-syntax) nil)
765 (set (make-local-variable 'comment-padding) "$$$")
766 (set (make-local-variable 'comment-start) fortran-comment-line-start)
767 (set (make-local-variable 'comment-start-skip)
768 ;; We can't reuse `fortran-comment-line-start-skip' directly because
769 ;; it contains backrefs whereas we need submatch-1 to end at the
770 ;; beginning of the comment delimiter.
771 ;; (concat "\\(\\)\\(![ \t]*\\|" fortran-comment-line-start-skip "\\)")
772 "\\(\\)\\(?:^[CcDd*]\\|!\\)\\(?:\\([^ \t\n]\\)\\2+\\)?[ \t]*")
773 (set (make-local-variable 'comment-indent-function) 'fortran-comment-indent)
774 (set (make-local-variable 'abbrev-all-caps) t)
775 (set (make-local-variable 'normal-auto-fill-function) 'fortran-auto-fill)
776 (set (make-local-variable 'indent-tabs-mode) (fortran-analyze-file-format))
777 (setq mode-line-process '(indent-tabs-mode fortran-tab-mode-string))
778 (set (make-local-variable 'fill-column) 72)
779 (set (make-local-variable 'fill-paragraph-function) 'fortran-fill-paragraph)
780 (set (make-local-variable 'font-lock-defaults)
781 '((fortran-font-lock-keywords
782 fortran-font-lock-keywords-1
783 fortran-font-lock-keywords-2
784 fortran-font-lock-keywords-3
785 fortran-font-lock-keywords-4)
786 nil t ((?/ . "$/") ("_$" . "w"))
787 fortran-beginning-of-subprogram))
788 (set (make-local-variable 'font-lock-syntactic-keywords)
789 fortran-font-lock-syntactic-keywords)
790 (set (make-local-variable 'imenu-case-fold-search) t)
791 (set (make-local-variable 'imenu-generic-expression)
792 fortran-imenu-generic-expression)
793 (set (make-local-variable 'imenu-syntax-alist) '(("_$" . "w")))
794 (set (make-local-variable 'beginning-of-defun-function)
795 #'fortran-beginning-of-subprogram)
796 (set (make-local-variable 'end-of-defun-function)
797 #'fortran-end-of-subprogram)
798 (set (make-local-variable 'add-log-current-defun-function)
799 #'fortran-current-defun)
800 (set (make-local-variable 'dabbrev-case-fold-search) 'case-fold-search)
801 (set (make-local-variable 'gud-find-expr-function) 'fortran-gud-find-expr)
802 (run-mode-hooks 'fortran-mode-hook))
805 (defun fortran-gud-find-expr ()
806 ;; Consider \n as punctuation (end of expression).
807 (with-syntax-table fortran-gud-syntax-table
810 (defsubst fortran-comment-indent ()
811 "Return the indentation appropriate for the current comment line.
812 This is 0 for a line matching `fortran-comment-line-start-skip', else
813 the value of `comment-column' (leaving at least one space after code)."
814 (if (looking-at fortran-comment-line-start-skip) 0
816 (skip-chars-backward " \t")
817 (max (1+ (current-column)) comment-column))))
819 (defun fortran-indent-comment ()
820 "Align or create comment on current line.
821 Existing comments of all types are recognized and aligned.
822 If the line has no comment, a side-by-side comment is inserted and aligned,
823 if the value of `comment-start' is not nil and allows such comments.
824 Otherwise, a separate-line comment is inserted, on this line
825 or on a new line inserted before this line if this line is not blank."
828 ;; Recognize existing comments of either kind.
829 (cond ((fortran-find-comment-start-skip 'all)
830 (goto-char (match-beginning 0))
832 (fortran-indent-line)
833 (unless (= (current-column) (fortran-comment-indent))
834 (delete-horizontal-space)
835 (indent-to (fortran-comment-indent)))))
836 ;; No existing comment.
837 ;; If side-by-side comments are defined, insert one,
838 ;; unless line is now blank.
839 ((and comment-start (not (looking-at "[ \t]*$"))
840 (string-match comment-start-skip (concat " " comment-start)))
842 (delete-horizontal-space)
843 (indent-to (fortran-comment-indent))
844 (insert comment-start))
845 ;; Else insert separate-line comment, making a new line if nec.
847 (if (looking-at "^[ \t]*$")
848 (delete-horizontal-space)
852 (insert fortran-comment-line-start)
853 (insert-char (if (stringp fortran-comment-indent-char)
854 (aref fortran-comment-indent-char 0)
855 fortran-comment-indent-char)
856 (- (fortran-calculate-indent) (current-column))))))
858 (defun fortran-comment-region (beg-region end-region arg)
859 "Comment every line in the region.
860 Inserts the string variable `fortran-comment-region' at the beginning of
861 every line in the region.
862 BEG-REGION and END-REGION specify the region boundaries.
863 With non-nil ARG, uncomments the region."
864 (interactive "*r\nP")
865 (let ((end-region-mark (copy-marker end-region))
866 (save-point (point-marker)))
867 (goto-char beg-region)
870 (let ((com (regexp-quote fortran-comment-region))) ; uncomment
872 (delete-region (point) (match-end 0)))
873 (while (and (zerop (forward-line 1))
874 (< (point) end-region-mark))
876 (delete-region (point) (match-end 0)))))
877 (insert fortran-comment-region) ; comment
878 (while (and (zerop (forward-line 1))
879 (< (point) end-region-mark))
880 (insert fortran-comment-region)))
881 (goto-char save-point)
882 (set-marker end-region-mark nil)
883 (set-marker save-point nil)))
886 (defun fortran-abbrev-start ()
887 "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
888 Any other key combination is executed normally."
890 (insert last-command-char)
892 (if (fboundp 'next-command-event) ; XEmacs
893 (setq event (next-command-event)
894 char (event-to-character event))
895 (setq event (read-event)
897 ;; Insert char if not equal to `?', or if abbrev-mode is off.
898 (if (and abbrev-mode (or (eq char ??) (eq char help-char)))
899 (fortran-abbrev-help)
900 (setq unread-command-events (list event)))))
902 (defun fortran-abbrev-help ()
903 "List the currently defined abbrevs in Fortran mode."
905 (message "Listing abbrev table...")
906 (display-buffer (fortran-prepare-abbrev-list-buffer))
907 (message "Listing abbrev table...done"))
909 (defun fortran-prepare-abbrev-list-buffer ()
910 "Create a buffer listing the Fortran mode abbreviations."
912 (set-buffer (get-buffer-create "*Abbrevs*"))
914 (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
915 (goto-char (point-min))
916 (set-buffer-modified-p nil)
918 (get-buffer-create "*Abbrevs*"))
920 (defun fortran-column-ruler ()
921 "Insert a column ruler momentarily above current line, till next keystroke.
922 The ruler is defined by the value of `fortran-column-ruler-fixed' in fixed
923 format mode, and `fortran-column-ruler-tab' in TAB format mode.
924 The next key typed is executed unless it is SPC."
926 (momentary-string-display
928 fortran-column-ruler-tab
929 fortran-column-ruler-fixed)
932 (if (eq (window-start (selected-window))
933 (window-point (selected-window)))
934 (line-beginning-position 2)
936 nil "Type SPC or any command to erase ruler."))
938 (defun fortran-window-create ()
939 "Make the window 72 columns wide.
940 See also `fortran-window-create-momentarily'."
942 (let ((window-min-width 2))
943 (if (< (window-width) (frame-width))
944 (enlarge-window-horizontally (- (frame-width)
946 (let* ((window-edges (window-edges))
947 (scroll-bar-width (- (nth 2 window-edges)
950 (split-window-horizontally (+ 72 scroll-bar-width)))
952 (switch-to-buffer " fortran-window-extra" t)
953 (select-window (previous-window))))
955 (defun fortran-window-create-momentarily (&optional arg)
956 "Momentarily make the window 72 columns wide.
957 Optional ARG non-nil and non-unity disables the momentary feature.
958 See also `fortran-window-create'."
962 (save-window-excursion
965 (fortran-window-create)
966 (error (error "No room for Fortran window")))
967 (message "Type SPC to continue editing.")
968 (let ((char (read-event)))
969 (or (equal char (string-to-char " "))
970 (setq unread-command-events (list char))))))
971 (fortran-window-create)))
973 (defun fortran-split-line ()
974 "Break line at point and insert continuation marker and alignment."
976 (delete-horizontal-space)
980 (and (fortran-find-comment-start-skip 'all)
981 (< (match-beginning 0) pos))))
982 (insert ?\n (match-string 0))
984 (insert ?\n ?\t (fortran-numerical-continuation-char))
985 (insert "\n " fortran-continuation-string))) ; space after \n important
986 (fortran-indent-line)) ; when cont string is C, c or *
988 (defun fortran-remove-continuation ()
989 "Delete any Fortran continuation characters at point.
990 Returns t if anything actually deleted."
991 (when (looking-at "\\( \\{5\\}[^ 0\n]\\|\t[1-9]\\|&\\)")
996 (defun fortran-join-line (arg)
997 "Join current line to the previous one and re-indent.
998 With a prefix argument, repeat this operation that many times.
999 If the prefix argument ARG is negative, join the next -ARG lines.
1000 Continuation lines are correctly handled."
1006 (while (not (zerop arg))
1008 (or (fortran-remove-continuation)
1009 (delete-indentation))
1010 (setq arg (1- arg)))
1011 (fortran-indent-line)))
1013 (defun fortran-numerical-continuation-char ()
1014 "Return a digit for tab-digit style of continuation lines.
1015 If previous line is a tab-digit continuation line, return that digit
1016 plus one, otherwise return 1. Zero not allowed."
1019 (if (looking-at "\t[1-9]")
1020 (+ ?1 (% (- (char-after (1+ (point))) ?0) 9))
1023 (put 'fortran-electric-line-number 'delete-selection t)
1024 (defun fortran-electric-line-number (arg)
1025 "Self insert, but if part of a Fortran line number indent it automatically.
1026 Auto-indent does not happen if a numeric ARG is used."
1028 (if (or arg (not fortran-electric-line-number))
1030 (self-insert-command (prefix-numeric-value arg))
1031 (self-insert-command 1))
1032 (if (or (and (= 5 (current-column))
1035 ;; In col 5 with only spaces to the left.
1036 (looking-at " \\{5\\}")))
1037 (and (= (if indent-tabs-mode
1038 fortran-minimum-statement-indent-tab
1039 fortran-minimum-statement-indent-fixed) (current-column))
1040 ;; In col 8 with a single tab to the left.
1041 (eq ?\t (char-after (line-beginning-position)))
1042 (not (or (eq last-command 'fortran-indent-line)
1044 'fortran-indent-new-line))))
1046 (re-search-backward "[^ \t0-9]"
1047 (line-beginning-position)
1048 t)) ; not a line number
1049 (looking-at "[0-9]")) ; within a line number
1050 (self-insert-command (prefix-numeric-value arg))
1051 (skip-chars-backward " \t")
1052 (insert last-command-char)
1053 (fortran-indent-line))))
1056 (defun fortran-check-end-prog-re ()
1057 "Check a preliminary match against `fortran-end-prog-re'."
1058 ;; Having got a possible match for the subprogram end, we need a
1059 ;; match of whitespace, avoiding possible column 73+ stuff.
1061 (string-match "^\\s-*\\(\\'\\|\\s<\\)"
1062 (buffer-substring (match-end 0)
1063 (min (line-end-position)
1064 (+ 72 (line-beginning-position)))))))
1066 ;; Note that you can't just check backwards for `subroutine' &c in
1067 ;; case of un-marked main programs not at the start of the file.
1068 (defun fortran-beginning-of-subprogram ()
1069 "Move point to the beginning of the current Fortran subprogram."
1072 (let ((case-fold-search t))
1073 (beginning-of-line -1)
1075 (while (re-search-backward fortran-end-prog-re nil 'move)
1076 (if (fortran-check-end-prog-re)
1080 (defun fortran-end-of-subprogram ()
1081 "Move point to the end of the current Fortran subprogram."
1084 (let ((case-fold-search t))
1085 (if (save-excursion ; on END
1087 (and (looking-at fortran-end-prog-re)
1088 (fortran-check-end-prog-re)))
1090 (beginning-of-line 2)
1092 (while (re-search-forward fortran-end-prog-re nil 'move)
1093 (if (fortran-check-end-prog-re)
1095 (goto-char (match-beginning 0))
1098 (defun fortran-previous-statement ()
1099 "Move point to beginning of the previous Fortran statement.
1100 Returns 'first-statement if that statement is the first
1101 non-comment Fortran statement in the file, and nil otherwise.
1102 Directive lines are treated as comments."
1104 (let (not-first-statement continue-test)
1108 (not (looking-at fortran-comment-line-start-skip))
1109 (not (looking-at fortran-directive-re))
1112 (regexp-quote fortran-continuation-string)))
1113 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))))
1114 (while (and (setq not-first-statement (zerop (forward-line -1)))
1115 (or (looking-at fortran-comment-line-start-skip)
1116 (looking-at fortran-directive-re)
1119 (regexp-quote fortran-continuation-string)))
1120 (looking-at "[ \t]*$\\| \\{5\\}[^ 0\n]\\|\t[1-9]")
1121 (looking-at (concat "[ \t]*" comment-start-skip)))))
1122 (cond ((and continue-test
1123 (not not-first-statement))
1124 (message "Incomplete continuation statement."))
1126 (fortran-previous-statement))
1127 ((not not-first-statement)
1128 'first-statement))))
1130 (defun fortran-next-statement ()
1131 "Move point to beginning of the next Fortran statement.
1132 Returns 'last-statement if that statement is the last
1133 non-comment Fortran statement in the file, and nil otherwise.
1134 Directive lines are treated as comments."
1136 (let (not-last-statement)
1138 (while (and (setq not-last-statement
1139 (and (zerop (forward-line 1))
1141 (or (looking-at fortran-comment-line-start-skip)
1142 (looking-at fortran-directive-re)
1143 (looking-at "[ \t]*$\\| [^ 0\n]\\|\t[1-9]")
1144 (looking-at (concat "[ \t]*" comment-start-skip)))))
1145 (if (not not-last-statement)
1148 (defun fortran-looking-at-if-then ()
1149 "Return non-nil if at the start of a line with an IF ... THEN statement."
1150 ;; cf f90-looking-at-if-then.
1152 (i (fortran-beginning-if)))
1159 ;; Used in hs-special-modes-alist.
1160 (defun fortran-end-of-block (&optional num)
1161 "Move point forward to the end of the current code block.
1162 With optional argument NUM, go forward that many balanced blocks.
1163 If NUM is negative, go backward to the start of a block. Does
1164 not check for consistency of block types. Interactively, pushes
1165 mark before moving point."
1167 (if (interactive-p) (push-mark (point) t))
1168 (and num (< num 0) (fortran-beginning-of-block (- num)))
1169 (let ((case-fold-search t)
1172 (while (and (> count 0)
1174 (concat "\\(" fortran-blocks-re
1175 (if fortran-check-all-num-for-matching-do
1176 "\\|^[ \t]*[0-9]+" "")
1177 "\\|continue\\|end\\)\\>")
1180 (if (if (looking-at (concat "^[0-9 \t]*" fortran-if-start-re))
1181 (fortran-looking-at-if-then)
1182 (looking-at fortran-start-block-re))
1183 (setq count (1+ count))
1184 (if (or (looking-at fortran-end-block-re)
1185 (and (or (looking-at "^[0-9 \t]*continue")
1186 (and fortran-check-all-num-for-matching-do
1187 (looking-at "[ \t]*[0-9]+")))
1188 (fortran-check-for-matching-do)))
1189 (setq count (1- count))))
1191 (if (> count 0) (error "Missing block end"))))
1193 (defun fortran-beginning-of-block (&optional num)
1194 "Move point backwards to the start of the current code block.
1195 With optional argument NUM, go backward that many balanced
1196 blocks. If NUM is negative, go forward to the end of a block.
1197 Does not check for consistency of block types. Interactively,
1198 pushes mark before moving point."
1200 (if (interactive-p) (push-mark (point) t))
1201 (and num (< num 0) (fortran-end-of-block (- num)))
1202 (let ((case-fold-search t)
1205 (while (and (> count 0)
1207 (concat "\\(" fortran-blocks-re
1208 (if fortran-check-all-num-for-matching-do
1209 "\\|^[ \t]*[0-9]+" "")
1210 "\\|continue\\|end\\)\\>")
1213 (if (if (looking-at (concat "^[0-9 \t]*" fortran-if-start-re))
1214 (fortran-looking-at-if-then)
1215 (looking-at fortran-start-block-re))
1216 (setq count (1- count))
1217 (if (or (looking-at fortran-end-block-re)
1218 (and (or (looking-at "^[0-9 \t]*continue")
1219 (and fortran-check-all-num-for-matching-do
1220 (looking-at "[ \t]*[0-9]+")))
1221 (fortran-check-for-matching-do)))
1222 (setq count (1+ count)))))
1223 ;; Includes an un-named main program block.
1224 (if (> count 0) (error "Missing block start"))))
1227 (defun fortran-blink-match (regex keyword find-begin)
1228 "From a line matching REGEX, blink matching KEYWORD statement line.
1229 Use function FIND-BEGIN to match it."
1230 (let ((top-of-window (window-start))
1232 (case-fold-search t)
1235 (when (save-excursion
1237 (skip-chars-forward " \t0-9")
1239 (if (not (setq matching (funcall find-begin)))
1240 (setq message (concat "No matching " keyword "."))
1241 (if (< matching top-of-window)
1243 (goto-char matching)
1247 (buffer-substring (point)
1248 (line-end-position)))))))
1250 (message "%s" message)
1251 (goto-char matching)
1253 (goto-char end-point)))))
1255 (defun fortran-blink-matching-if ()
1256 "From an ENDIF or ELSE statement, blink the matching IF statement."
1257 (fortran-blink-match "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"
1258 "if" #'fortran-beginning-if))
1260 (defun fortran-blink-matching-do ()
1261 "From an ENDDO statement, blink the matching DO or DO WHILE statement."
1262 (fortran-blink-match "end[ \t]*do\\b" "do" #'fortran-beginning-do))
1264 (defun fortran-mark-do ()
1265 "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
1266 The marks are pushed."
1268 (let (enddo-point do-point)
1269 (if (setq enddo-point (fortran-end-do))
1270 (if (not (setq do-point (fortran-beginning-do)))
1271 (message "No matching do.")
1272 (goto-char enddo-point)
1274 (goto-char do-point)))))
1276 (defun fortran-end-do ()
1277 "Search forward for first unmatched ENDDO.
1278 Return point or nil."
1279 (let ((case-fold-search t))
1280 (if (save-excursion (beginning-of-line)
1281 (skip-chars-forward " \t0-9")
1282 (looking-at "end[ \t]*do\\b"))
1288 (while (and (not (zerop count))
1289 (not (eq (fortran-next-statement) 'last-statement))
1290 ;; Keep local to subprogram.
1291 (not (and (looking-at fortran-end-prog-re)
1292 (fortran-check-end-prog-re))))
1293 (skip-chars-forward " \t0-9")
1294 (cond ((looking-at "end[ \t]*do\\b")
1295 (setq count (1- count)))
1297 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
1298 (setq count (1+ count)))))
1300 ;; All pairs accounted for.
1303 (defun fortran-beginning-do ()
1304 "Search backwards for first unmatched DO [WHILE].
1305 Return point or nil. Ignores labelled DO loops (ie DO 10 ... 10 CONTINUE)."
1306 (let ((case-fold-search t)
1307 (dostart-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]"))
1310 (skip-chars-forward " \t0-9")
1311 (looking-at dostart-re))
1317 (while (and (not (zerop count))
1318 (not (eq (fortran-previous-statement) 'first-statement))
1319 ;; Keep local to subprogram.
1320 (not (and (looking-at fortran-end-prog-re)
1321 (fortran-check-end-prog-re))))
1322 (skip-chars-forward " \t0-9")
1323 (cond ((looking-at dostart-re)
1324 (setq count (1- count)))
1325 ;; Note labelled loop ends not considered.
1326 ((looking-at "end[ \t]*do\\b")
1327 (setq count (1+ count)))))
1329 ;; All pairs accounted for.
1332 (defun fortran-mark-if ()
1333 "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
1334 The marks are pushed."
1336 (let (endif-point if-point)
1337 (if (setq endif-point (fortran-end-if))
1338 (if (not (setq if-point (fortran-beginning-if)))
1339 (message "No matching if.")
1340 ;; Set mark, move point.
1341 (goto-char endif-point)
1343 (goto-char if-point)))))
1345 (defun fortran-end-if ()
1346 "Search forwards for first unmatched ENDIF.
1347 Return point or nil."
1348 (let ((case-fold-search t))
1349 (if (save-excursion (beginning-of-line)
1350 (skip-chars-forward " \t0-9")
1351 (looking-at "end[ \t]*if\\b"))
1354 ;; Search for one. The point has been already been moved to first
1355 ;; letter on line but this should not cause troubles.
1358 (while (and (not (zerop count))
1359 (not (eq (fortran-next-statement) 'last-statement))
1360 ;; Keep local to subprogram.
1361 (not (and (looking-at fortran-end-prog-re)
1362 (fortran-check-end-prog-re))))
1363 (skip-chars-forward " \t0-9")
1364 (cond ((looking-at "end[ \t]*if\\b")
1365 (setq count (1- count)))
1366 ((looking-at fortran-if-start-re)
1369 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1370 (let (then-test) ; multi-line if-then
1373 (zerop (forward-line 1))
1374 ;; Search forward for then.
1375 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1379 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1381 (setq count (1+ count)))))))
1383 ;; All pairs accounted for.
1386 (defun fortran-beginning-if ()
1387 "Search backwards for first unmatched IF-THEN.
1388 Return point or nil."
1389 (let ((case-fold-search t))
1391 ;; May be sitting on multi-line if-then statement, first
1392 ;; move to beginning of current statement. Note:
1393 ;; `fortran-previous-statement' moves to previous statement
1394 ;; *unless* current statement is first one. Only move
1395 ;; forward if not first-statement.
1396 (if (not (eq (fortran-previous-statement) 'first-statement))
1397 (fortran-next-statement))
1398 (skip-chars-forward " \t0-9")
1400 (looking-at fortran-if-start-re)
1402 (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1403 ;; Multi-line if-then.
1406 (and (zerop (forward-line 1))
1407 ;; Search forward for then.
1408 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1412 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1419 (while (and (not (zerop count))
1420 (not (eq (fortran-previous-statement) 'first-statement))
1421 ;; Keep local to subprogram.
1422 (not (and (looking-at fortran-end-prog-re)
1423 (fortran-check-end-prog-re))))
1424 (skip-chars-forward " \t0-9")
1425 (cond ((looking-at fortran-if-start-re)
1428 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1429 (let (then-test) ; multi-line if-then
1432 (zerop (forward-line 1))
1433 ;; Search forward for then.
1434 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1438 (concat ".*then\\b[ \t]*"
1439 "[^ \t(=a-z0-9]"))))))
1441 (setq count (1- count)))))
1442 ((looking-at "end[ \t]*if\\b")
1443 (setq count (1+ count)))))
1445 ;; All pairs accounted for.
1449 (defun fortran-indent-line ()
1450 "Indent current Fortran line based on its contents and on previous lines."
1452 (let ((cfi (fortran-calculate-indent)))
1455 (if (or (not (= cfi (fortran-current-line-indentation)))
1456 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t)
1457 (not (fortran-line-number-indented-correctly-p))))
1458 (fortran-indent-to-column cfi)
1460 (if (fortran-find-comment-start-skip)
1461 (fortran-indent-comment))))
1462 ;; Never leave point in left margin.
1463 (if (< (current-column) cfi)
1464 (move-to-column cfi))
1465 (and auto-fill-function
1466 (> (save-excursion (end-of-line) (current-column))
1471 (when fortran-blink-matching-if
1472 (fortran-blink-matching-if)
1473 (fortran-blink-matching-do))))
1475 (defun fortran-auto-fill ()
1476 "Function to use for `normal-auto-fill-function' in Fortran mode."
1477 (if (> (current-column) (current-fill-column))
1478 (let ((cfi (fortran-calculate-indent)))
1481 (if (or (not (= cfi (fortran-current-line-indentation)))
1482 (and (re-search-forward "^[ \t]*[0-9]+"
1484 (not (fortran-line-number-indented-correctly-p))))
1485 (fortran-indent-to-column cfi)
1487 (if (fortran-find-comment-start-skip)
1488 (fortran-indent-comment))))
1490 ;; Never leave point in left margin.
1491 (if (< (current-column) cfi)
1492 (move-to-column cfi)))))
1494 ;; Historically this was a separate function which advertised itself
1495 ;; as reindenting but only did so where `most likely to be necessary'.
1496 (defalias 'fortran-indent-new-line 'reindent-then-newline-and-indent)
1498 (defun fortran-indent-subprogram ()
1499 "Properly indent the Fortran subprogram containing point."
1503 (message "Indenting subprogram...")
1504 (indent-region (point) (mark) nil))
1505 (message "Indenting subprogram...done."))
1507 (defun fortran-calculate-indent ()
1508 "Calculates the Fortran indent column based on previous lines."
1509 (let (icol first-statement (case-fold-search t)
1510 (fortran-minimum-statement-indent
1511 (if indent-tabs-mode
1512 fortran-minimum-statement-indent-tab
1513 fortran-minimum-statement-indent-fixed)))
1515 (setq first-statement (fortran-previous-statement))
1517 (setq icol fortran-minimum-statement-indent)
1518 (if (= (point) (point-min))
1519 (setq icol fortran-minimum-statement-indent)
1520 (setq icol (fortran-current-line-indentation)))
1521 (skip-chars-forward " \t0-9")
1522 (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
1523 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
1524 (let (then-test) ; multi-line if-then
1525 (while (and (zerop (forward-line 1))
1526 ;; Search forward for then.
1527 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1528 (not (setq then-test
1531 *[^ \t_$(=a-z0-9]")))))
1533 (setq icol (+ icol fortran-if-indent))))
1534 ((looking-at "else\\(if\\)?\\b")
1535 (setq icol (+ icol fortran-if-indent)))
1536 ((looking-at "select[ \t]*case[ \t](.*)")
1537 (setq icol (+ icol fortran-if-indent)))
1538 ((looking-at "case[ \t]*(.*)")
1539 (setq icol (+ icol fortran-if-indent)))
1540 ((looking-at "case[ \t]*default\\b")
1541 (setq icol (+ icol fortran-if-indent)))
1542 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1543 (setq icol (+ icol fortran-if-indent)))
1544 ((looking-at "where[ \t]*(.*)[ \t]*\n")
1545 (setq icol (+ icol fortran-if-indent)))
1546 ((looking-at "do\\b")
1547 (setq icol (+ icol fortran-do-indent)))
1549 "\\(structure\\|union\\|map\\|interface\\)\
1550 \\b[ \t]*[^ \t=(a-z]")
1551 (setq icol (+ icol fortran-structure-indent)))
1552 ((and (looking-at fortran-end-prog-re1)
1553 (fortran-check-end-prog-re))
1554 ;; Previous END resets indent to minimum.
1555 (setq icol fortran-minimum-statement-indent)))))
1558 (cond ((looking-at "[ \t]*$"))
1559 ;; Check for directive before comment, so as not to indent.
1560 ((looking-at fortran-directive-re)
1561 (setq fortran-minimum-statement-indent 0 icol 0))
1562 ((looking-at fortran-comment-line-start-skip)
1563 (cond ((eq fortran-comment-indent-style 'relative)
1564 (setq icol (+ icol fortran-comment-line-extra-indent)))
1565 ((eq fortran-comment-indent-style 'fixed)
1566 (setq icol (+ fortran-minimum-statement-indent
1567 fortran-comment-line-extra-indent))))
1568 (setq fortran-minimum-statement-indent 0))
1569 ((or (looking-at (concat "[ \t]*"
1571 fortran-continuation-string)))
1572 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1573 (skip-chars-forward " \t")
1574 ;; Do not introduce extra whitespace into a broken string.
1576 (if (fortran-is-in-string-p (point))
1578 (+ icol fortran-continuation-indent))))
1580 ((and fortran-check-all-num-for-matching-do
1581 (looking-at "[ \t]*[0-9]+")
1582 (fortran-check-for-matching-do))
1583 (setq icol (- icol fortran-do-indent)))
1585 (skip-chars-forward " \t0-9")
1586 (cond ((looking-at "end[ \t]*\\(if\\|select\\|where\\)\\b")
1587 (setq icol (- icol fortran-if-indent)))
1588 ((looking-at "else\\(if\\)?\\b")
1589 (setq icol (- icol fortran-if-indent)))
1590 ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
1591 (setq icol (- icol fortran-if-indent)))
1592 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1593 (setq icol (- icol fortran-if-indent)))
1594 ((and (looking-at "continue\\b")
1595 (fortran-check-for-matching-do))
1596 (setq icol (- icol fortran-do-indent)))
1597 ((looking-at "end[ \t]*do\\b")
1598 (setq icol (- icol fortran-do-indent)))
1599 ((looking-at "end[ \t]*\
1600 \\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1601 (setq icol (- icol fortran-structure-indent)))
1602 ((and (looking-at fortran-end-prog-re1)
1603 (fortran-check-end-prog-re)
1604 (not (= icol fortran-minimum-statement-indent)))
1605 (message "Warning: `end' not in column %d. Probably\
1606 an unclosed block." fortran-minimum-statement-indent))))))
1607 (max fortran-minimum-statement-indent icol)))
1610 (defun fortran-current-line-indentation ()
1611 "Indentation of current line, ignoring Fortran line number or continuation.
1612 This is the column position of the first non-whitespace character
1613 aside from the line number and/or column 5/8 line-continuation character.
1614 For comment lines, returns indentation of the first
1615 non-indentation text within the comment."
1618 (cond ((looking-at fortran-comment-line-start-skip)
1619 (goto-char (match-end 0))
1621 (if (stringp fortran-comment-indent-char)
1622 fortran-comment-indent-char
1623 (char-to-string fortran-comment-indent-char))))
1624 ((or (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1625 (goto-char (match-end 0)))
1627 ;; Move past line number.
1628 (skip-chars-forward "[ \t0-9]")))
1629 ;; Move past whitespace.
1630 (skip-chars-forward " \t")
1633 (defun fortran-indent-to-column (col)
1634 "Indent current line to column COL.
1635 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
1636 line, and this continuation character is retained on indentation;
1637 2) If `fortran-continuation-string' is the first non-whitespace
1638 character, this is a continuation line;
1639 3) A non-continuation line which has a number as the first
1640 non-whitespace character is a numbered line.
1641 4) A TAB followed by a digit indicates a continuation line."
1644 (if (looking-at fortran-comment-line-start-skip)
1645 (if fortran-comment-indent-style
1646 (let* ((char (if (stringp fortran-comment-indent-char)
1647 (aref fortran-comment-indent-char 0)
1648 fortran-comment-indent-char))
1649 (chars (string ? ?\t char)))
1650 (goto-char (match-end 0))
1651 (skip-chars-backward chars)
1652 (delete-region (point) (progn (skip-chars-forward chars)
1654 (insert-char char (- col (current-column)))))
1655 (if (looking-at "\t[1-9]")
1656 (if indent-tabs-mode
1657 (goto-char (match-end 0))
1660 (insert fortran-continuation-string))
1661 (if (looking-at " \\{5\\}[^ 0\n]")
1662 (if indent-tabs-mode
1663 (progn (delete-char 6)
1664 (insert ?\t (fortran-numerical-continuation-char) 1))
1666 (delete-horizontal-space)
1667 ;; Put line number in columns 0-4, or
1668 ;; continuation character in column 5.
1670 ((looking-at (regexp-quote fortran-continuation-string))
1671 (if indent-tabs-mode
1674 (if indent-tabs-mode
1675 fortran-minimum-statement-indent-tab
1676 fortran-minimum-statement-indent-fixed))
1678 (insert-char (fortran-numerical-continuation-char) 1))
1681 ((looking-at "[0-9]+")
1682 (let ((extra-space (- 5 (- (match-end 0) (point)))))
1683 (if (< extra-space 0)
1684 (message "Warning: line number exceeds 5-digit limit.")
1685 (indent-to (min fortran-line-number-indent extra-space))))
1686 (skip-chars-forward "0-9")))))
1687 ;; Point is now after any continuation character or line number.
1688 ;; Put body of statement where specified.
1689 (delete-horizontal-space)
1691 ;; Indent any comment following code on the same line.
1692 (when (fortran-find-comment-start-skip)
1693 (goto-char (match-beginning 0))
1694 (unless (= (current-column) (fortran-comment-indent))
1695 (delete-horizontal-space)
1696 (indent-to (fortran-comment-indent)))))))
1698 (defun fortran-line-number-indented-correctly-p ()
1699 "Return t if current line's line number is correctly indented.
1700 Do not call if there is no line number."
1703 (skip-chars-forward " \t")
1704 (and (<= (current-column) fortran-line-number-indent)
1705 (or (= (current-column) fortran-line-number-indent)
1706 (progn (skip-chars-forward "0-9")
1707 (= (current-column) 5))))))
1709 (defun fortran-check-for-matching-do ()
1710 "When called from a numbered statement, return t if matching DO is found.
1711 Otherwise return nil."
1712 (let ((case-fold-search t)
1716 (when (looking-at "[ \t]*[0-9]+")
1717 (skip-chars-forward " \t")
1718 (skip-chars-forward "0") ; skip past leading zeros
1720 (buffer-substring (point) (progn
1721 (skip-chars-forward "0-9")
1727 (and (re-search-backward
1729 "\\(^[ \t0-9]*do[ \t]*0*"
1730 charnum "\\b\\)\\|" "\\(^[ \t]*0*"
1734 (concat "^[ \t0-9]*do[ \t]*0*"
1737 (defun fortran-find-comment-start-skip (&optional all)
1738 "Move to past `comment-start-skip' found on current line.
1739 Return non-nil if `comment-start-skip' found, nil if not.
1740 If ALL is nil, only match comments that start in column > 0."
1741 ;; Hopefully at some point we can just use the line below! -stef
1742 ;; (comment-search-forward (line-end-position) t))
1743 (when (or all comment-start-skip)
1745 (css (if comment-start-skip
1746 (concat fortran-comment-line-start-skip
1747 "\\|" comment-start-skip)
1748 fortran-comment-line-start-skip)))
1749 (when (re-search-forward css (line-end-position) t)
1750 (if (and (or all (> (match-beginning 0) (line-beginning-position)))
1751 (or (save-match-data
1752 (not (fortran-is-in-string-p (match-beginning 0))))
1753 ;; Recurse for rest of line.
1754 (fortran-find-comment-start-skip all)))
1759 ;; From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1760 ;; Test if TAB format continuation lines work.
1761 (defun fortran-is-in-string-p (where)
1762 "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
1766 ((bolp) nil) ; bol is never inside a string
1767 ((save-excursion ; comment lines too
1769 (looking-at fortran-comment-line-start-skip)) nil)
1770 (t (let ((parse-state '(0 nil nil nil nil nil 0))
1771 (quoted-comment-start (if comment-start
1772 (regexp-quote comment-start)))
1774 parse-limit end-of-line)
1775 ;; Move to start of current statement.
1776 (fortran-next-statement)
1777 (fortran-previous-statement)
1778 ;; Now parse up to WHERE.
1780 (if (or ;; Skip to next line if:
1782 (looking-at fortran-comment-line-start-skip)
1783 ;; - at end of line?
1785 ;; - not in a string and after comment-start?
1786 (and (not (nth 3 parse-state))
1788 (equal comment-start
1789 (char-to-string (preceding-char)))))
1790 (if (> (forward-line) 0)
1791 (setq not-done nil))
1793 ;; If we are at beginning of code line, skip any
1794 ;; whitespace, labels and tab continuation markers.
1795 (if (bolp) (skip-chars-forward " \t0-9"))
1796 ;; If we are in column <= 5 now, check for continuation char.
1797 (cond ((= 5 (current-column)) (forward-char 1))
1798 ((and (< (current-column) 5)
1799 (equal fortran-continuation-string
1800 (char-to-string (following-char)))
1802 ;; Find out parse-limit from here.
1803 (setq end-of-line (line-end-position))
1804 (setq parse-limit (min where end-of-line))
1805 ;; Parse max up to comment-start, if non-nil and in current line.
1808 (if (re-search-forward quoted-comment-start end-of-line t)
1809 (setq parse-limit (min (point) parse-limit)))))
1810 ;; Now parse if still in limits.
1811 (if (< (point) where)
1812 (setq parse-state (parse-partial-sexp
1813 (point) parse-limit nil nil parse-state))
1814 (setq not-done nil))))
1816 (nth 3 parse-state))))))
1818 ;; From old version.
1819 (defalias 'fortran-auto-fill-mode 'auto-fill-mode)
1821 (defun fortran-fill ()
1822 "Fill the current line at an appropriate point(s)."
1823 (let* ((auto-fill-function #'fortran-auto-fill)
1825 (bol (line-beginning-position))
1826 (eol (line-end-position))
1827 (bos (min eol (+ bol (fortran-current-line-indentation))))
1828 ;; If in a string at fill-column, break it either before the
1829 ;; initial quote, or at fill-col (if string is too long).
1833 ;; OK to break quotes on comment lines.
1834 (unless (looking-at fortran-comment-line-start-skip)
1835 (let (fcpoint start)
1836 (move-to-column fill-column)
1837 (when (fortran-is-in-string-p (setq fcpoint (point)))
1839 (re-search-backward "\\S\"\\s\"\\S\"?" bol t)
1841 (if fortran-break-before-delimiters
1844 (if (re-search-forward "\\S\"\\s\"\\S\"" eol t)
1846 ;; If the current string is longer than (fill-column
1847 ;; - 6) chars, break it at the fill column (else
1849 (if (> (- (point) start)
1850 (- fill-column 6 fortran-continuation-indent))
1853 ;; Decide where to split the line. If a position for a quoted
1854 ;; string was found above then use that, else break the line
1855 ;; before/after the last delimiter.
1859 ;; If f-b-b-d is t, have an extra column to play with,
1860 ;; since delimiter gets shifted to new line.
1861 (move-to-column (if fortran-break-before-delimiters
1867 ;; Adapted from f90-find-breakpoint.
1868 (re-search-backward fortran-break-delimiters-re bol)
1869 (if (not fortran-break-before-delimiters)
1870 (if (looking-at fortran-no-break-re)
1871 ;; Deal with cases such as "**" split over
1872 ;; fill-col. Simpler alternative would be
1873 ;; to start from (1- fill-column) above.
1874 (if (> (+ 2 (current-column)) fill-column)
1879 (or (looking-at fortran-no-break-re)
1881 ;; Line indented beyond fill-column?
1882 (when (<= (point) bos)
1883 (move-to-column (1+ fill-column))
1884 ;; What is this doing???
1885 (or (re-search-forward "[\t\n,'+-/*)=]" eol t)
1888 (re-search-forward "[ \t]" opoint t))
1890 ;; If we are in an in-line comment, don't break unless the
1891 ;; line of code is longer than it should be. Otherwise
1892 ;; break the line at the column computed above.
1894 ;; Need to use fortran-find-comment-start-skip to make sure that
1895 ;; quoted !'s don't prevent a break.
1896 (when (and (save-excursion
1898 (if (not (fortran-find-comment-start-skip))
1900 (goto-char (match-beginning 0))
1901 (>= (point) fill-point)))
1903 (goto-char fill-point)
1908 (min (1+ fill-column)
1909 (+ (fortran-calculate-indent)
1910 fortran-continuation-indent))))
1911 (goto-char fill-point)
1912 (fortran-break-line)
1915 (defun fortran-break-line ()
1916 "Call `fortran-split-line'. Joins continuation lines first, then refills."
1917 (let ((opoint (point))
1918 (bol (line-beginning-position))
1921 (if (fortran-find-comment-start-skip)
1922 (delete-and-extract-region
1923 (match-beginning 0) (line-end-position))))))
1924 ;; Forward line 1 really needs to go to next non white line.
1925 (if (save-excursion (forward-line)
1926 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1929 (delete-region (point) (match-end 0))
1930 (delete-horizontal-space)
1932 (fortran-split-line))
1937 (delete-horizontal-space)
1938 (indent-to (fortran-comment-indent))
1939 (insert comment-string)))))
1941 (defun fortran-analyze-file-format ()
1942 "Return nil if fixed format is used, t if TAB formatting is used.
1943 Use `fortran-tab-mode-default' if no non-comment statements are found
1944 before the end or in the first `fortran-analyze-depth' lines."
1947 (goto-char (point-min))
1950 (eq (char-after) ?\t)
1951 (looking-at " \\{6\\}")
1952 (> i fortran-analyze-depth)))
1956 ((eq (char-after) ?\t) t)
1957 ((looking-at " \\{6\\}") nil)
1958 (t fortran-tab-mode-default)))))
1960 (defun fortran-fill-paragraph (&optional justify)
1961 "Fill surrounding comment block as paragraphs, else fill statement.
1962 Intended as the value of `fill-paragraph-function'.
1963 A comment block is filled by calling `fill-comment-paragraph' with
1964 argument JUSTIFY, otherwise `fortran-fill-statement' is called.
1965 Always returns non-nil (to prevent `fill-paragraph' being called)."
1967 (or (fill-comment-paragraph justify)
1968 (fortran-fill-statement)
1971 (defun fortran-fill-statement ()
1972 "Fill a Fortran statement up to `fill-column'."
1974 (let ((auto-fill-function #'fortran-auto-fill))
1975 (unless (save-excursion
1977 (or (looking-at "[ \t]*$")
1978 (looking-at fortran-comment-line-start-skip)
1979 (and comment-start-skip
1980 (looking-at (concat "[ \t]*" comment-start-skip)))))
1982 ;; Find beginning of statement.
1983 (fortran-next-statement)
1984 (fortran-previous-statement)
1985 ;; Re-indent initially.
1986 (fortran-indent-line)
1987 ;; Replace newline plus continuation field plus indentation with
1991 (fortran-remove-continuation)))
1992 (fortran-previous-statement)))
1993 (fortran-indent-line)))
1995 (defun fortran-strip-sequence-nos (&optional do-space)
1996 "Delete all text in column 72 and up (assumed to be sequence numbers).
1997 Normally also deletes trailing whitespace after stripping such text.
1998 Supplying prefix arg DO-SPACE prevents stripping the whitespace."
2001 (goto-char (point-min))
2002 (while (re-search-forward "^.\\{72\\}\\(.*\\)" nil t)
2003 (replace-match "" nil nil nil 1)
2004 (unless do-space (delete-horizontal-space)))))
2006 ;; This code used to live in add-log.el, but this is a better place
2008 (defun fortran-current-defun ()
2009 "Function to use for `add-log-current-defun-function' in Fortran mode."
2011 ;; We must be inside function body for this to work.
2012 (fortran-beginning-of-subprogram)
2013 (let ((case-fold-search t)) ; case-insensitive
2014 ;; Search for fortran subprogram start.
2015 (if (re-search-forward
2016 (concat "^[ \t]*\\(program\\|subroutine\\|function"
2017 "\\|[ \ta-z0-9*()]*[ \t]+function\\|"
2018 "\\(block[ \t]*data\\)\\)")
2019 (save-excursion (fortran-end-of-subprogram)
2022 (or (match-string-no-properties 2)
2024 ;; Move to EOL or before first left paren.
2025 (if (re-search-forward "[(\n]" nil t)
2026 (progn (backward-char)
2027 (skip-chars-backward " \t"))
2029 ;; Use the name preceding that.
2030 (buffer-substring-no-properties (point) (progn (backward-sexp)
2036 ;;; arch-tag: 74935096-21c4-4cab-8ee5-6ef16090dc04
2037 ;;; fortran.el ends here