1 ;;; fortran.el --- Fortran mode for GNU Emacs
3 ;; Copyright (C) 1986, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001,
4 ;; 2002, 2003, 2004, 2005, 2006, 2007
5 ;; Free Software Foundation, Inc.
7 ;; Author: Michael D. Prange <prange@erl.mit.edu>
8 ;; Maintainer: Glenn Morris <rgm@gnu.org>
9 ;; Keywords: fortran, languages
11 ;; This file is part of GNU Emacs.
13 ;; GNU Emacs is free software; you can redistribute it and/or modify
14 ;; it under the terms of the GNU General Public License as published by
15 ;; the Free Software Foundation; either version 3, or (at your option)
18 ;; GNU Emacs is distributed in the hope that it will be useful,
19 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
20 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 ;; GNU General Public License for more details.
23 ;; You should have received a copy of the GNU General Public License
24 ;; along with GNU Emacs; see the file COPYING. If not, write to the
25 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
26 ;; Boston, MA 02110-1301, USA.
30 ;; This mode is documented in the Emacs manual.
32 ;; Note that it is for editing Fortran77 or Fortran90 fixed source
33 ;; form. For editing Fortran 90 free format source, use `f90-mode'
34 ;; (f90.el). It is meant to support the GNU Fortran language
35 ;; implemented by g77 (its extensions to Fortran77 and
36 ;; interpretations, e.g. of blackslash in strings).
40 ;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
42 ;; We acknowledge many contributions and valuable suggestions by
43 ;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
44 ;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
45 ;; Gary Sabot and Richard Stallman.
51 ;; * Tidy it all up (more)!
52 ;; * Implement insertion and removal of statement continuations in
53 ;; mixed f77/f90 style, with the first `&' past column 72 and the
54 ;; second in column 6.
55 ;; * Support any other extensions to f77 grokked by GNU Fortran I've missed.
58 (defvar dabbrev-case-fold-search)
59 (defvar gud-find-expr-function)
60 (defvar imenu-case-fold-search)
61 (defvar imenu-syntax-alist)
65 "Major mode for editing fixed format Fortran code."
66 :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
67 :link '(custom-manual "(emacs)Fortran")
70 (defgroup fortran-indent nil
71 "Indentation variables in Fortran mode."
75 (defgroup fortran-comment nil
76 "Comment-handling variables in Fortran mode."
81 (defcustom fortran-tab-mode-default nil
82 "Default tabbing/carriage control style for empty files in Fortran mode.
83 A non-nil value specifies tab-digit style of continuation control.
84 A value of nil specifies that continuation lines are marked
85 with a character in column 6."
87 :group 'fortran-indent)
89 ;; TODO add more detail of what tab mode is to doc string.
90 (defcustom fortran-tab-mode-string
91 (propertize "/t" 'help-echo "This buffer is in Fortran TAB mode"
92 'mouse-face 'mode-line-highlight
94 (make-mode-line-mouse-map 'mouse-1
98 'fortran-tab-mode-string))))
99 "String to appear in mode line in TAB format buffers."
101 :group 'fortran-indent)
103 (put 'fortran-tab-mode-string 'risky-local-variable t)
105 (defcustom fortran-do-indent 3
106 "Extra indentation applied to DO blocks."
108 :group 'fortran-indent)
110 (defcustom fortran-if-indent 3
111 "Extra indentation applied to IF, SELECT CASE and WHERE blocks."
113 :group 'fortran-indent)
115 (defcustom fortran-structure-indent 3
116 "Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
118 :group 'fortran-indent)
120 (defcustom fortran-continuation-indent 5
121 "Extra indentation applied to continuation lines."
123 :group 'fortran-indent)
125 (defcustom fortran-comment-indent-style 'fixed
126 "How to indent comments.
127 nil forces comment lines not to be touched;
128 `fixed' indents to `fortran-comment-line-extra-indent' columns beyond
129 `fortran-minimum-statement-indent-fixed' (if `indent-tabs-mode' nil), or
130 `fortran-minimum-statement-indent-tab' (if `indent-tabs-mode' non-nil);
131 `relative' indents to current Fortran indentation plus
132 `fortran-comment-line-extra-indent'."
133 :type '(radio (const :tag "Untouched" nil) (const fixed) (const relative))
134 :group 'fortran-indent)
136 (defcustom fortran-comment-line-extra-indent 0
137 "Amount of extra indentation for text within full-line comments."
139 :group 'fortran-indent
140 :group 'fortran-comment)
142 (defcustom fortran-comment-line-start "C"
143 "Delimiter inserted to start new full-line comment.
144 You might want to change this to \"*\", for instance."
147 :group 'fortran-comment)
149 ;; This used to match preprocessor lines too, but that messes up
150 ;; filling and doesn't seem to be necessary.
151 (defcustom fortran-comment-line-start-skip
152 "^[CcDd*!]\\(\\([^ \t\n]\\)\\2+\\)?[ \t]*"
153 "Regexp to match the start of a full-line comment."
156 :group 'fortran-comment)
158 (defcustom fortran-directive-re
160 "Regexp to match a directive line.
161 The matching text will be fontified with `font-lock-keyword-face'.
162 The matching line will be given zero indentation."
165 :group 'fortran-indent)
167 (defcustom fortran-minimum-statement-indent-fixed 6
168 "Minimum statement indentation for fixed format continuation style."
170 :group 'fortran-indent)
172 (defcustom fortran-minimum-statement-indent-tab (max tab-width 6)
173 "Minimum statement indentation for TAB format continuation style."
175 :group 'fortran-indent)
177 ;; Note that this is documented in the v18 manuals as being a string
178 ;; of length one rather than a single character.
179 ;; The code in this file accepts either format for compatibility.
180 (defcustom fortran-comment-indent-char " "
181 "Single-character string inserted for Fortran comment indentation.
184 :group 'fortran-comment)
186 (defcustom fortran-line-number-indent 1
187 "Maximum indentation for Fortran line numbers.
188 5 means right-justify them within their five-column field."
190 :group 'fortran-indent)
192 (defcustom fortran-check-all-num-for-matching-do nil
193 "Non-nil causes all numbered lines to be treated as possible DO loop ends."
197 (defcustom fortran-blink-matching-if nil
198 "Non-nil causes \\[fortran-indent-line] on ENDIF to blink on matching IF.
199 Also, from an ENDDO statement blink on matching DO [WHILE] statement."
203 (defcustom fortran-continuation-string "$"
204 "Single-character string used for Fortran continuation lines.
205 In fixed format continuation style, this character is inserted in
206 column 6 by \\[fortran-split-line] to begin a continuation line.
207 Also, if \\[fortran-indent-line] finds this at the beginning of a
208 line, it will convert the line into a continuation line of the
209 appropriate style. Normally $."
213 (defcustom fortran-comment-region "c$$$"
214 "String inserted by \\[fortran-comment-region] at start of each \
217 :group 'fortran-comment)
219 (defcustom fortran-electric-line-number t
220 "Non-nil causes line numbers to be moved to the correct column as typed."
224 ;; TODO use fortran-line-length, somehow.
225 (defcustom fortran-column-ruler-fixed
226 "0 4 6 10 20 30 40 5\
228 \[ ]|{ | | | | | | | | \
230 "String displayed above current line by \\[fortran-column-ruler].
231 This variable is used in fixed format mode.
232 See the variable `fortran-column-ruler-tab' for TAB format mode."
236 ;; TODO use fortran-line-length, somehow.
237 (defcustom fortran-column-ruler-tab
240 \[ ]| { | | | | | | | | \
242 "String displayed above current line by \\[fortran-column-ruler].
243 This variable is used in TAB format mode.
244 See the variable `fortran-column-ruler-fixed' for fixed format mode."
248 (defcustom fortran-analyze-depth 100
249 "Number of lines to scan to identify fixed or TAB format style."
253 (defcustom fortran-break-before-delimiters t
254 "Non-nil causes filling to break lines before delimiters.
255 Delimiters are characters matching the regexp `fortran-break-delimiters-re'."
259 ;; TODO 0 as no-limit, as per g77.
260 (defcustom fortran-line-length 72
261 "Maximum number of characters in a line of fixed-form Fortran code.
262 Characters beyond this point are treated as comments. Setting
263 this variable directly (after fortran mode is loaded) does not
264 take effect. Use either \\[customize] (which affects all Fortran
265 buffers and the default) or the function
266 `fortran-line-length' (which can also operate on just the current
267 buffer). This corresponds to the g77 compiler option
268 `-ffixed-line-length-N'."
270 :initialize 'custom-initialize-default
271 :set (lambda (symbol value)
272 ;; Do all fortran buffers, and the default.
273 (fortran-line-length value t))
277 (put 'fortran-line-length 'safe-local-variable 'integerp)
278 (make-variable-buffer-local 'fortran-line-length)
280 (defcustom fortran-mode-hook nil
281 "Hook run when entering Fortran mode."
286 (defconst fortran-break-delimiters-re "[-+*/><=, \t]"
287 "Regexp matching delimiter characters at which lines may be broken.
288 There are certain tokens comprised entirely of characters
289 matching this regexp that should not be split, and these are
290 specified by the constant `fortran-no-break-re'.")
292 ;; The ">=", etc F77 extensions are supported by g77.
293 (defconst fortran-no-break-re
294 (regexp-opt '("**" "//" "=>" ">=" "<=" "==" "/=") 'paren)
295 "Regexp specifying where not to break lines when filling.
296 This regexp matches certain tokens comprised entirely of
297 characters matching the regexp `fortran-break-delimiters-re' that should
298 not be split by filling. Each element is assumed to be two
301 (defconst fortran-if-start-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*("
302 "Regexp matching the start of an IF statement.")
304 (defconst fortran-end-prog-re1
306 \\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
307 \\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?"
308 "Regexp possibly matching the end of a subprogram.")
310 (defconst fortran-end-prog-re
311 (concat "^[ \t0-9]*" fortran-end-prog-re1)
312 "Regexp possibly matching the end of a subprogram, from the line start.
313 See also `fortran-end-prog-re1'.")
315 (defconst fortran-type-types
317 (mapconcat 'identity ; " " -> "[ \t]*"
321 '("character" "byte" "integer" "logical"
322 "none" "real" "complex"
323 "double precision" "double complex"))
324 (structured-types '("structure" "union" "map"))
325 (other-types '("record" "dimension"
326 "parameter" "common" "save"
327 "external" "intrinsic" "data"
330 (mapcar (lambda (x) (concat "implicit " x))
333 (mapcar (lambda (x) (concat "end " x))
336 other-types)) 'paren))
338 "Regexp matching Fortran types.")
340 (defvar fortran-font-lock-keywords-1
341 ;; Program, subroutine and function declarations, plus calls.
342 '(("\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|\
343 program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?"
344 (1 font-lock-keyword-face)
345 (2 font-lock-function-name-face nil t)))
346 "Subdued level highlighting for Fortran mode.")
348 (defvar fortran-font-lock-keywords-2
349 (append fortran-font-lock-keywords-1
351 ;; Fontify all type specifiers (must be first - see below).
352 (cons fortran-type-types 'font-lock-type-face)
353 ;; Builtin keywords (except logical, do and goto - see below).
354 (concat "\\<" (regexp-opt
355 '("continue" "format" "end" "enddo"
356 "if" "then" "else" "endif" "elseif"
357 "while" "inquire" "stop" "return"
358 "include" "open" "close" "read"
359 "write" "format" "print" "select" "case"
360 "cycle" "exit" "rewind" "backspace"
363 ;; Builtin operators.
364 (concat "\\." (regexp-opt
365 '("and" "or" "not" "lt" "le" "eq" "ge"
366 "gt" "ne" "true" "false")
368 ;; do/goto keywords and targets, and goto tags.
369 '("\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
370 (1 font-lock-keyword-face)
371 (2 font-lock-constant-face nil t))
372 '("^ *\\([0-9]+\\)" . font-lock-constant-face)))
373 "Medium level highlighting for Fortran mode.")
375 (defvar fortran-font-lock-keywords-3
377 fortran-font-lock-keywords-1
378 ;; All type specifiers plus their declared items.
380 (list (concat fortran-type-types "[ \t(/]*\\(*\\)?")
382 '(1 font-lock-type-face)
383 ;; Declaration item (or just /.../ block name).
384 `(font-lock-match-c-style-declaration-item-and-skip-to-next
385 ;; Start after any *(...) expression.
387 (and (match-beginning ,(1+ (regexp-opt-depth
388 fortran-type-types)))
392 ;; No need to clean up.
394 ;; Fontify as a variable name, functions fontified elsewhere.
395 (1 font-lock-variable-name-face nil t))))
396 ;; Things extra to `fortran-font-lock-keywords-3' (must be done first).
398 ;; Goto-like `err=label'/`end=label' in read/write statements.
399 '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
400 (1 font-lock-keyword-face) (4 font-lock-constant-face nil t))
401 ;; Standard continuation character and in a TAB-formatted line.
402 '("^ \\{5\\}\\([^ 0\n]\\)" 1 font-lock-string-face)
403 '("^\t\\([1-9]\\)" 1 font-lock-string-face))
404 `((,fortran-directive-re (0 font-lock-keyword-face t)))
405 ;; `fortran-font-lock-keywords-2' without types (see above).
406 (cdr (nthcdr (length fortran-font-lock-keywords-1)
407 fortran-font-lock-keywords-2)))
408 "Gaudy level highlighting for Fortran mode.")
410 (defvar fortran-font-lock-keywords-4
411 (append fortran-font-lock-keywords-3
415 '("int" "ifix" "idint" "real" "float" "sngl"
416 "dble" "cmplx" "ichar" "char" "aint" "dint"
417 "anint" "dnint" "nint" "idnint" "iabs" "abs"
418 "dabs" "cabs" "mod" "amod" "dmod" "isign"
419 "sign" "dsign" "idim" "dim" "ddim" "dprod"
420 "max" "max0" "amax1" "dmax1" "amax0" "max1"
421 "min" "min0" "amin1" "dmin1" "amin0" "min1"
422 "len" "index" "lge" "lgt" "lle" "llt" "aimag"
423 "conjg" "sqrt" "dsqrt" "csqrt" "exp" "dexp"
424 "cexp" "log" "alog" "dlog" "clog" "log10"
425 "alog10" "dlog10" "sin" "dsin" "csin" "cos"
426 "dcos" "ccos" "tan" "dtan" "asin" "dasin"
427 "acos" "dacos" "atan" "datan" "atan2" "datan2"
428 "sinh" "dsinh" "cosh" "dcosh" "tanh" "dtanh")
429 'paren) "[ \t]*(") '(1 font-lock-builtin-face))))
430 "Maximum highlighting for Fortran mode.
431 Consists of level 3 plus all other intrinsics not already highlighted.")
433 ;; Comments are real pain in Fortran because there is no way to
434 ;; represent the standard comment syntax in an Emacs syntax table.
435 ;; (We can do so for F90-style). Therefore an unmatched quote in a
436 ;; standard comment will throw fontification off on the wrong track.
437 ;; So we do syntactic fontification with regexps.
438 (defun fortran-font-lock-syntactic-keywords ()
439 "Return a value for `font-lock-syntactic-keywords' in Fortran mode.
440 This varies according to the value of `fortran-line-length'.
441 This is used to fontify fixed-format Fortran comments."
442 `(("^[cd\\*]" 0 (11))
443 (,(format "^[^cd\\*\t\n].\\{%d\\}\\([^\n]+\\)" (1- fortran-line-length))
446 (defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
447 "Default expressions to highlight in Fortran mode.")
449 (defvar fortran-imenu-generic-expression
450 ;; These patterns could be confused by sequence nos. in cols 72+ and
451 ;; don't allow continuations everywhere.
455 ;; [This will be fooled by `end function' allowed by G77. Also,
456 ;; it assumes sensible whitespace is employed.]
458 ;; leading whitespace:
460 ;; function declaration with optional type, e.g. `real',
461 ;; `real*4', character(*), `double precision':
462 "\\(\\sw\\|\\s-\\|[*()+]\\)*"
463 "\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)"
464 ;; Possible statement continuation:
465 "[ \t" fortran-continuation-string "]+"
466 ;; Variable to index:
469 ;; Un-named block data.
470 '(nil "^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
471 "Value for `imenu-generic-expression' in Fortran mode.")
475 (defconst fortran-blocks-re
476 (concat "block[ \t]*data\\|select[ \t]*case\\|"
477 (regexp-opt '("do" "if" "interface" "function" "map" "program"
478 "structure" "subroutine" "union" "where")))
479 "Regexp potentially indicating the start or end of a Fortran \"block\".
480 Omits naked END statements, and DO-loops closed by anything other
483 (defconst fortran-end-block-re
484 ;; Do-loops terminated by things other than ENDDO cannot be handled
485 ;; with a regexp. This omission does not seem to matter to hideshow...
486 (concat "^[ \t0-9]*\\<end[ \t]*\\("
488 ;; Naked END statement.
490 "Regexp matching the end of a Fortran \"block\", from the line start.
491 Note that only ENDDO is handled for the end of a DO-loop. Used
492 in the Fortran entry in `hs-special-modes-alist'.")
494 (defconst fortran-start-block-re
496 "^[ \t0-9]*\\(" ; statement number
497 ;; Structure label for DO, IF, SELECT, WHERE.
498 "\\(\\(\\sw+[ \t]*:[ \t]*\\)?"
499 ;; IF blocks are a nuisance:
500 ;; IF ( ... ) foo is not a block, but a single statement.
501 ;; IF ( ... ) THEN can be split over multiple lines.
502 ;; [So can, eg, a DO WHILE (... ), but that is less common, I hope.]
503 ;; The regexp below allows for it to be split over at most 2 lines.
504 ;; That leads to the problem of not matching two consecutive IF
505 ;; statements as one, eg:
508 ;; It simply is not possible to do this in a 100% correct fashion
509 ;; using a regexp - see the functions fortran-end-if,
510 ;; fortran-beginning-if for the hoops we have to go through.
511 ;; An alternative is to match on THEN at a line end, eg:
512 ;; ".*)[ \t]*then[ \t]*\\($\\|!\\)"
513 ;; This would also match ELSE branches, though. This does not seem
514 ;; right to me, because then one has neighbouring blocks that are
515 ;; not nested in each other.
516 "\\(if[ \t]*(\\(.*\\|"
517 ".*\n\\([^if]*\\([^i].\\|.[^f]\\|.\\>\\)\\)\\)\\<then\\|"
518 "do\\|select[ \t]*case\\|where\\)\\)\\|"
519 (regexp-opt '("interface" "function" "map" "program"
520 "structure" "subroutine" "union"))
521 "\\|block[ \t]*data\\)[ \t]*")
522 "Regexp matching the start of a Fortran \"block\", from the line start.
523 A simple regexp cannot do this in fully correct fashion, so this
524 tries to strike a compromise between complexity and flexibility.
525 Used in the Fortran entry in `hs-special-modes-alist'.")
527 (add-to-list 'hs-special-modes-alist
528 `(fortran-mode ,fortran-start-block-re ,fortran-end-block-re
529 "^[cC*!]" fortran-end-of-block nil))
532 (defvar fortran-mode-syntax-table
533 (let ((table (make-syntax-table)))
534 ;; We might like `;' to be punctuation (g77 multi-statement
535 ;; lines), but that screws abbrevs.
536 (modify-syntax-entry ?\; "w" table)
537 (modify-syntax-entry ?\r " " table)
538 (modify-syntax-entry ?+ "." table)
539 (modify-syntax-entry ?- "." table)
540 (modify-syntax-entry ?= "." table)
541 (modify-syntax-entry ?* "." table)
542 (modify-syntax-entry ?/ "." table)
543 (modify-syntax-entry ?\' "\"" table)
544 (modify-syntax-entry ?\" "\"" table)
545 ;; Consistent with GNU Fortran's default -- see the manual.
546 ;; The F77 standard imposes no rule on this issue.
547 (modify-syntax-entry ?\\ "\\" table)
548 ;; This might be better as punctuation, as for C, but this way you
549 ;; can treat floating-point numbers as symbols.
550 (modify-syntax-entry ?. "_" table) ; e.g. `a.ne.b'
551 (modify-syntax-entry ?_ "_" table)
552 (modify-syntax-entry ?$ "_" table) ; esp. VMSisms
553 (modify-syntax-entry ?\! "<" table)
554 (modify-syntax-entry ?\n ">" table)
556 "Syntax table used in Fortran mode.")
558 (defvar fortran-gud-syntax-table
559 (let ((st (make-syntax-table fortran-mode-syntax-table)))
560 (modify-syntax-entry ?\n "." st)
562 "Syntax table used to parse Fortran expressions for printing in GUD.")
564 (defvar fortran-mode-map
565 (let ((map (make-sparse-keymap)))
566 (define-key map ";" 'fortran-abbrev-start)
567 (define-key map "\C-c;" 'fortran-comment-region)
568 (define-key map "\M-;" 'fortran-indent-comment)
569 (define-key map "\M-\n" 'fortran-split-line)
570 (define-key map "\M-\C-n" 'fortran-end-of-block)
571 (define-key map "\M-\C-p" 'fortran-beginning-of-block)
572 (define-key map "\M-\C-q" 'fortran-indent-subprogram)
573 (define-key map "\C-c\C-w" 'fortran-window-create-momentarily)
574 (define-key map "\C-c\C-r" 'fortran-column-ruler)
575 (define-key map "\C-c\C-p" 'fortran-previous-statement)
576 (define-key map "\C-c\C-n" 'fortran-next-statement)
577 (define-key map "\C-c\C-d" 'fortran-join-line) ; like f90
578 (define-key map "\M-^" 'fortran-join-line) ; subvert delete-indentation
579 (define-key map "0" 'fortran-electric-line-number)
580 (define-key map "1" 'fortran-electric-line-number)
581 (define-key map "2" 'fortran-electric-line-number)
582 (define-key map "3" 'fortran-electric-line-number)
583 (define-key map "4" 'fortran-electric-line-number)
584 (define-key map "5" 'fortran-electric-line-number)
585 (define-key map "6" 'fortran-electric-line-number)
586 (define-key map "7" 'fortran-electric-line-number)
587 (define-key map "8" 'fortran-electric-line-number)
588 (define-key map "9" 'fortran-electric-line-number)
590 (easy-menu-define fortran-menu map "Menu for Fortran mode."
592 ["Manual" (info "(emacs)Fortran")]
594 ,(custom-menu-create 'fortran)
596 ["Save" Custom-save t]
597 ["Reset to Current" Custom-reset-current t]
598 ["Reset to Saved" Custom-reset-saved t]
599 ["Reset to Standard Settings" Custom-reset-standard t]
602 ["Comment Region" fortran-comment-region mark-active]
604 (fortran-comment-region (region-beginning) (region-end) 1)
606 ["Indent Region" indent-region mark-active]
607 ["Indent Subprogram" fortran-indent-subprogram t]
609 ["Beginning of Subprogram" fortran-beginning-of-subprogram t]
610 ["End of Subprogram" fortran-end-of-subprogram t]
612 ["Subprogram" mark-defun t]
613 ["IF Block" fortran-mark-if t]
614 ["DO Block" fortran-mark-do t]
616 ["Narrow to Subprogram" narrow-to-defun t]
619 ["Temporary column ruler" fortran-column-ruler t]
620 ;; May not be '72', depending on fortran-line-length, but this
621 ;; seems ok for a menu item.
622 ["72-column window" fortran-window-create t]
624 (enlarge-window-horizontally (- (frame-width) (window-width)))
625 (< (window-width) (frame-width))]
626 ["Momentary 72-column window" fortran-window-create-momentarily t]
628 ["Break Line at Point" fortran-split-line t]
629 ["Join Line" fortran-join-line t]
630 ["Fill Statement/Comment" fill-paragraph t]
632 ["Toggle auto-fill" auto-fill-mode :selected auto-fill-function
634 ["Toggle abbrev-mode" abbrev-mode :selected abbrev-mode
636 ["Add imenu Menu" imenu-add-menubar-index
637 :active (not (lookup-key (current-local-map) [menu-bar index]))
638 :included (fboundp 'imenu-add-to-menubar)]))
640 "Keymap used in Fortran mode.")
643 (defvar fortran-mode-abbrev-table
645 (define-abbrev-table 'fortran-mode-abbrev-table nil)
646 fortran-mode-abbrev-table)
647 "Abbrev table for Fortran mode.")
649 (let (abbrevs-changed)
650 ;; Use the 6th arg (SYSTEM-FLAG) of define-abbrev if possible.
651 ;; Only use `apply' to quieten the byte-compiler.
653 (function (lambda (element)
655 (apply 'define-abbrev fortran-mode-abbrev-table
656 (append element '(nil 0 t)))
657 (wrong-number-of-arguments
658 (apply 'define-abbrev fortran-mode-abbrev-table
659 (append element '(nil 0)))))))
660 '((";au" "automatic" )
662 (";bd" "block data" )
671 (";dc" "double complex" )
672 (";dp" "double precision" )
678 (";eq" "equivalence" )
687 (";ib" "implicit byte" )
688 (";ic" "implicit complex" )
689 (";ich" "implicit character")
690 (";ii" "implicit integer" )
691 (";il" "implicit logical" )
692 (";ir" "implicit real" )
695 (";intr" "intrinsic" )
698 (";o" "open" ) ; was ;op
712 (";su" "subroutine" )
721 (defun fortran-mode ()
722 "Major mode for editing Fortran code in fixed format.
723 For free format code, use `f90-mode'.
725 \\[fortran-indent-line] indents the current Fortran line correctly.
726 Note that DO statements must not share a common CONTINUE.
728 Type ;? or ;\\[help-command] to display a list of built-in abbrevs for\
734 Variables controlling indentation style and extra features:
736 `fortran-comment-line-start'
737 To use comments starting with `!', set this to the string \"!\".
739 Extra indentation within DO blocks (default 3).
741 Extra indentation within IF blocks (default 3).
742 `fortran-structure-indent'
743 Extra indentation within STRUCTURE, UNION, MAP and INTERFACE blocks.
745 `fortran-continuation-indent'
746 Extra indentation applied to continuation statements (default 5).
747 `fortran-comment-line-extra-indent'
748 Amount of extra indentation for text in full-line comments (default 0).
749 `fortran-comment-indent-style'
750 How to indent the text in full-line comments. Allowed values are:
751 nil don't change the indentation
752 fixed indent to `fortran-comment-line-extra-indent' beyond the
754 `fortran-minimum-statement-indent-fixed' (fixed format) or
755 `fortran-minimum-statement-indent-tab' (TAB format),
756 depending on the continuation format in use.
757 relative indent to `fortran-comment-line-extra-indent' beyond the
758 indentation for a line of code.
760 `fortran-comment-indent-char'
761 Single-character string to be inserted instead of space for
762 full-line comment indentation (default \" \").
763 `fortran-minimum-statement-indent-fixed'
764 Minimum indentation for statements in fixed format mode (default 6).
765 `fortran-minimum-statement-indent-tab'
766 Minimum indentation for statements in TAB format mode (default 9).
767 `fortran-line-number-indent'
768 Maximum indentation for line numbers (default 1). A line number will
769 get less than this much indentation if necessary to avoid reaching
771 `fortran-check-all-num-for-matching-do'
772 Non-nil causes all numbered lines to be treated as possible \"continue\"
773 statements (default nil).
774 `fortran-blink-matching-if'
775 Non-nil causes \\[fortran-indent-line] on an ENDIF (or ENDDO) statement
776 to blink on the matching IF (or DO [WHILE]). (default nil)
777 `fortran-continuation-string'
778 Single-character string to be inserted in column 5 of a continuation
779 line (default \"$\").
780 `fortran-comment-region'
781 String inserted by \\[fortran-comment-region] at start of each line in
782 the region (default \"c$$$\").
783 `fortran-electric-line-number'
784 Non-nil causes line number digits to be moved to the correct column
785 as typed (default t).
786 `fortran-break-before-delimiters'
787 Non-nil causes lines to be broken before delimiters (default t).
789 Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
790 with no args, if that value is non-nil."
792 (kill-all-local-variables)
793 (setq major-mode 'fortran-mode
795 local-abbrev-table fortran-mode-abbrev-table)
796 (set-syntax-table fortran-mode-syntax-table)
797 (use-local-map fortran-mode-map)
798 (set (make-local-variable 'indent-line-function) 'fortran-indent-line)
799 (set (make-local-variable 'indent-region-function)
801 (let (fortran-blink-matching-if ; avoid blinking delay
802 indent-region-function)
803 (indent-region start end nil))))
804 (set (make-local-variable 'require-final-newline) mode-require-final-newline)
805 ;; The syntax tables don't understand the column-0 comment-markers.
806 (set (make-local-variable 'comment-use-syntax) nil)
807 (set (make-local-variable 'comment-padding) "$$$")
808 (set (make-local-variable 'comment-start) fortran-comment-line-start)
809 (set (make-local-variable 'comment-start-skip)
810 ;; We can't reuse `fortran-comment-line-start-skip' directly because
811 ;; it contains backrefs whereas we need submatch-1 to end at the
812 ;; beginning of the comment delimiter.
813 ;; (concat "\\(\\)\\(![ \t]*\\|" fortran-comment-line-start-skip "\\)")
814 "\\(\\)\\(?:^[CcDd*]\\|!\\)\\(?:\\([^ \t\n]\\)\\2+\\)?[ \t]*")
815 (set (make-local-variable 'comment-indent-function) 'fortran-comment-indent)
816 (set (make-local-variable 'abbrev-all-caps) t)
817 (set (make-local-variable 'normal-auto-fill-function) 'fortran-auto-fill)
818 (set (make-local-variable 'indent-tabs-mode) (fortran-analyze-file-format))
819 (setq mode-line-process '(indent-tabs-mode fortran-tab-mode-string))
820 (set (make-local-variable 'fill-column) fortran-line-length)
821 (set (make-local-variable 'fill-paragraph-function) 'fortran-fill-paragraph)
822 (set (make-local-variable 'font-lock-defaults)
823 '((fortran-font-lock-keywords
824 fortran-font-lock-keywords-1
825 fortran-font-lock-keywords-2
826 fortran-font-lock-keywords-3
827 fortran-font-lock-keywords-4)
828 nil t ((?/ . "$/") ("_$" . "w"))
829 fortran-beginning-of-subprogram
830 (font-lock-syntactic-keywords
831 . (fortran-font-lock-syntactic-keywords))))
832 (set (make-local-variable 'imenu-case-fold-search) t)
833 (set (make-local-variable 'imenu-generic-expression)
834 fortran-imenu-generic-expression)
835 (set (make-local-variable 'imenu-syntax-alist) '(("_$" . "w")))
836 (set (make-local-variable 'beginning-of-defun-function)
837 #'fortran-beginning-of-subprogram)
838 (set (make-local-variable 'end-of-defun-function)
839 #'fortran-end-of-subprogram)
840 (set (make-local-variable 'add-log-current-defun-function)
841 #'fortran-current-defun)
842 (set (make-local-variable 'dabbrev-case-fold-search) 'case-fold-search)
843 (set (make-local-variable 'gud-find-expr-function) 'fortran-gud-find-expr)
844 (add-hook 'hack-local-variables-hook 'fortran-hack-local-variables nil t)
845 (run-mode-hooks 'fortran-mode-hook))
848 (defun fortran-line-length (nchars &optional global)
849 "Set the length of fixed-form Fortran lines to NCHARS.
850 This normally only affects the current buffer, which must be in
851 Fortran mode. If the optional argument GLOBAL is non-nil, it
852 affects all Fortran buffers, and also the default."
856 (with-current-buffer buff
857 (when (eq major-mode 'fortran-mode)
858 (setq fortran-line-length nchars
859 fill-column fortran-line-length
860 new (fortran-font-lock-syntactic-keywords))
861 ;; Refontify only if necessary.
862 (unless (equal new font-lock-syntactic-keywords)
863 (setq font-lock-syntactic-keywords
864 (fortran-font-lock-syntactic-keywords))
865 (if font-lock-mode (font-lock-mode 1))))))
868 (list (current-buffer))))
870 (setq-default fortran-line-length nchars))))
872 (defun fortran-hack-local-variables ()
873 "Fortran mode adds this to `hack-local-variables-hook'."
874 (fortran-line-length fortran-line-length))
876 (defun fortran-gud-find-expr ()
877 ;; Consider \n as punctuation (end of expression).
878 (with-syntax-table fortran-gud-syntax-table
881 (defsubst fortran-comment-indent ()
882 "Return the indentation appropriate for the current comment line.
883 This is 0 for a line matching `fortran-comment-line-start-skip', else
884 the value of `comment-column' (leaving at least one space after code)."
885 (if (looking-at fortran-comment-line-start-skip) 0
887 (skip-chars-backward " \t")
888 (max (1+ (current-column)) comment-column))))
890 (defun fortran-indent-comment ()
891 "Align or create comment on current line.
892 Existing comments of all types are recognized and aligned.
893 If the line has no comment, a side-by-side comment is inserted and aligned,
894 if the value of `comment-start' is not nil and allows such comments.
895 Otherwise, a separate-line comment is inserted, on this line
896 or on a new line inserted before this line if this line is not blank."
899 ;; Recognize existing comments of either kind.
900 (cond ((fortran-find-comment-start-skip 'all)
901 (goto-char (match-beginning 0))
903 (fortran-indent-line)
904 (unless (= (current-column) (fortran-comment-indent))
905 (delete-horizontal-space)
906 (indent-to (fortran-comment-indent)))))
907 ;; No existing comment.
908 ;; If side-by-side comments are defined, insert one,
909 ;; unless line is now blank.
910 ((and comment-start (not (looking-at "[ \t]*$"))
911 (string-match comment-start-skip (concat " " comment-start)))
913 (delete-horizontal-space)
914 (indent-to (fortran-comment-indent))
915 (insert comment-start))
916 ;; Else insert separate-line comment, making a new line if nec.
918 (if (looking-at "^[ \t]*$")
919 (delete-horizontal-space)
923 (insert fortran-comment-line-start)
924 (insert-char (if (stringp fortran-comment-indent-char)
925 (aref fortran-comment-indent-char 0)
926 fortran-comment-indent-char)
927 (- (fortran-calculate-indent) (current-column))))))
929 (defun fortran-comment-region (beg-region end-region arg)
930 "Comment every line in the region.
931 Inserts the string variable `fortran-comment-region' at the beginning of
932 every line in the region.
933 BEG-REGION and END-REGION specify the region boundaries.
934 With non-nil ARG, uncomments the region."
935 (interactive "*r\nP")
936 (let ((end-region-mark (copy-marker end-region))
937 (save-point (point-marker)))
938 (goto-char beg-region)
941 (let ((com (regexp-quote fortran-comment-region))) ; uncomment
943 (delete-region (point) (match-end 0)))
944 (while (and (zerop (forward-line 1))
945 (< (point) end-region-mark))
947 (delete-region (point) (match-end 0)))))
948 (insert fortran-comment-region) ; comment
949 (while (and (zerop (forward-line 1))
950 (< (point) end-region-mark))
951 (insert fortran-comment-region)))
952 (goto-char save-point)
953 (set-marker end-region-mark nil)
954 (set-marker save-point nil)))
957 (defun fortran-abbrev-start ()
958 "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
959 Any other key combination is executed normally."
961 (insert last-command-char)
962 (let* ((event (if (fboundp 'next-command-event) ; XEmacs
965 (char (if (fboundp 'event-to-character)
966 (event-to-character event) event)))
967 ;; Insert char if not equal to `?', or if abbrev-mode is off.
968 (if (and abbrev-mode (or (eq char ??) (eq char help-char)
969 (memq event help-event-list)))
970 (fortran-abbrev-help)
971 (push event unread-command-events))))
973 (defun fortran-abbrev-help ()
974 "List the currently defined abbrevs in Fortran mode."
976 (message "Listing abbrev table...")
977 (display-buffer (fortran-prepare-abbrev-list-buffer))
978 (message "Listing abbrev table...done"))
980 (defun fortran-prepare-abbrev-list-buffer ()
981 "Create a buffer listing the Fortran mode abbreviations."
982 (with-current-buffer (get-buffer-create "*Abbrevs*")
984 (insert-abbrev-table-description 'fortran-mode-abbrev-table t)
985 (goto-char (point-min))
986 (set-buffer-modified-p nil)
988 (get-buffer-create "*Abbrevs*"))
990 (defun fortran-column-ruler ()
991 "Insert a column ruler momentarily above current line, till next keystroke.
992 The ruler is defined by the value of `fortran-column-ruler-fixed' in fixed
993 format mode, and `fortran-column-ruler-tab' in TAB format mode.
994 The next key typed is executed unless it is SPC."
996 (momentary-string-display
998 fortran-column-ruler-tab
999 fortran-column-ruler-fixed)
1002 (if (eq (window-start (selected-window))
1003 (window-point (selected-window)))
1004 (line-beginning-position 2)
1006 nil "Type SPC or any command to erase ruler."))
1008 (defun fortran-window-create ()
1009 "Make the window `fortran-line-length' (default 72) columns wide.
1010 See also `fortran-window-create-momentarily'."
1012 (let ((window-min-width 2))
1013 (if (< (window-width) (frame-width))
1014 (enlarge-window-horizontally (- (frame-width)
1016 (let* ((window-edges (window-edges))
1017 (scroll-bar-width (- (nth 2 window-edges)
1020 (split-window-horizontally (+ fortran-line-length scroll-bar-width)))
1022 (switch-to-buffer " fortran-window-extra" t)
1023 (select-window (previous-window))))
1025 (defun fortran-window-create-momentarily (&optional arg)
1026 "Momentarily make the window `fortran-line-length' (default 72) columns wide.
1027 Optional ARG non-nil and non-unity disables the momentary feature.
1028 See also `fortran-window-create'."
1032 (save-window-excursion
1035 (fortran-window-create)
1036 (error (error "No room for Fortran window")))
1037 (message "Type SPC to continue editing.")
1038 (let ((char (read-event)))
1039 (or (equal char ?\s)
1040 (setq unread-command-events (list char))))))
1041 (fortran-window-create)))
1043 (defun fortran-split-line ()
1044 "Break line at point and insert continuation marker and alignment."
1046 (delete-horizontal-space)
1048 (let ((pos (point)))
1050 (and (fortran-find-comment-start-skip 'all)
1051 (< (match-beginning 0) pos))))
1052 (insert ?\n (match-string 0))
1053 (if indent-tabs-mode
1054 (insert ?\n ?\t (fortran-numerical-continuation-char))
1055 (insert "\n " fortran-continuation-string))) ; space after \n important
1056 (fortran-indent-line)) ; when cont string is C, c or *
1058 (defun fortran-remove-continuation ()
1059 "Delete any Fortran continuation characters at point.
1060 Returns t if anything actually deleted."
1061 (when (looking-at "\\( \\{5\\}[^ 0\n]\\|\t[1-9]\\|&\\)")
1063 (delete-indentation)
1066 (defun fortran-join-line (arg)
1067 "Join current line to the previous one and re-indent.
1068 With a prefix argument, repeat this operation that many times.
1069 If the prefix argument ARG is negative, join the next -ARG lines.
1070 Continuation lines are correctly handled."
1076 (while (not (zerop arg))
1078 (or (fortran-remove-continuation)
1079 (delete-indentation))
1080 (setq arg (1- arg)))
1081 (fortran-indent-line)))
1083 (defun fortran-numerical-continuation-char ()
1084 "Return a digit for tab-digit style of continuation lines.
1085 If previous line is a tab-digit continuation line, return that digit
1086 plus one, otherwise return 1. Zero not allowed."
1089 (if (looking-at "\t[1-9]")
1090 (+ ?1 (% (- (char-after (1+ (point))) ?0) 9))
1093 (put 'fortran-electric-line-number 'delete-selection t)
1094 (defun fortran-electric-line-number (arg)
1095 "Self insert, but if part of a Fortran line number indent it automatically.
1096 Auto-indent does not happen if a numeric ARG is used."
1098 (if (or arg (not fortran-electric-line-number))
1100 (self-insert-command (prefix-numeric-value arg))
1101 (self-insert-command 1))
1102 (if (or (and (= 5 (current-column))
1105 ;; In col 5 with only spaces to the left.
1106 (looking-at " \\{5\\}")))
1107 (and (= (if indent-tabs-mode
1108 fortran-minimum-statement-indent-tab
1109 fortran-minimum-statement-indent-fixed) (current-column))
1110 ;; In col 8 with a single tab to the left.
1111 (eq ?\t (char-after (line-beginning-position)))
1112 (not (or (eq last-command 'fortran-indent-line)
1114 'fortran-indent-new-line))))
1116 (re-search-backward "[^ \t0-9]"
1117 (line-beginning-position)
1118 t)) ; not a line number
1119 (looking-at "[0-9]")) ; within a line number
1120 (self-insert-command (prefix-numeric-value arg))
1121 (skip-chars-backward " \t")
1122 (insert last-command-char)
1123 (fortran-indent-line))))
1126 (defun fortran-check-end-prog-re ()
1127 "Check a preliminary match against `fortran-end-prog-re'."
1128 ;; Having got a possible match for the subprogram end, we need a
1129 ;; match of whitespace, avoiding possible column 73+ stuff.
1131 (string-match "^\\s-*\\(\\'\\|\\s<\\)"
1132 (buffer-substring (match-end 0)
1133 (min (line-end-position)
1134 (+ fortran-line-length
1135 (line-beginning-position)))))))
1137 ;; Note that you can't just check backwards for `subroutine' &c in
1138 ;; case of un-marked main programs not at the start of the file.
1139 (defun fortran-beginning-of-subprogram ()
1140 "Move point to the beginning of the current Fortran subprogram."
1143 (let ((case-fold-search t))
1144 (beginning-of-line -1)
1146 (while (re-search-backward fortran-end-prog-re nil 'move)
1147 (if (fortran-check-end-prog-re)
1151 (defun fortran-end-of-subprogram ()
1152 "Move point to the end of the current Fortran subprogram."
1155 (let ((case-fold-search t))
1156 (if (save-excursion ; on END
1158 (and (looking-at fortran-end-prog-re)
1159 (fortran-check-end-prog-re)))
1161 (beginning-of-line 2)
1163 (while (re-search-forward fortran-end-prog-re nil 'move)
1164 (if (fortran-check-end-prog-re)
1166 (goto-char (match-beginning 0))
1169 (defun fortran-previous-statement ()
1170 "Move point to beginning of the previous Fortran statement.
1171 Returns 'first-statement if that statement is the first
1172 non-comment Fortran statement in the file, and nil otherwise.
1173 Directive lines are treated as comments."
1175 (let (not-first-statement continue-test)
1179 (not (looking-at fortran-comment-line-start-skip))
1180 (not (looking-at fortran-directive-re))
1183 (regexp-quote fortran-continuation-string)))
1184 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))))
1185 (while (and (setq not-first-statement (zerop (forward-line -1)))
1186 (or (looking-at fortran-comment-line-start-skip)
1187 (looking-at fortran-directive-re)
1190 (regexp-quote fortran-continuation-string)))
1191 (looking-at "[ \t]*$\\| \\{5\\}[^ 0\n]\\|\t[1-9]")
1192 (looking-at (concat "[ \t]*" comment-start-skip)))))
1193 (cond ((and continue-test
1194 (not not-first-statement))
1195 (message "Incomplete continuation statement."))
1197 (fortran-previous-statement))
1198 ((not not-first-statement)
1199 'first-statement))))
1201 (defun fortran-next-statement ()
1202 "Move point to beginning of the next Fortran statement.
1203 Returns 'last-statement if that statement is the last
1204 non-comment Fortran statement in the file, and nil otherwise.
1205 Directive lines are treated as comments."
1207 (let (not-last-statement)
1209 (while (and (setq not-last-statement
1210 (and (zerop (forward-line 1))
1212 (or (looking-at fortran-comment-line-start-skip)
1213 (looking-at fortran-directive-re)
1214 (looking-at "[ \t]*$\\| [^ 0\n]\\|\t[1-9]")
1215 (looking-at (concat "[ \t]*" comment-start-skip)))))
1216 (if (not not-last-statement)
1219 (defun fortran-looking-at-if-then ()
1220 "Return non-nil if at the start of a line with an IF ... THEN statement."
1221 ;; cf f90-looking-at-if-then.
1223 (i (fortran-beginning-if)))
1230 ;; Used in hs-special-modes-alist.
1231 (defun fortran-end-of-block (&optional num)
1232 "Move point forward to the end of the current code block.
1233 With optional argument NUM, go forward that many balanced blocks.
1234 If NUM is negative, go backward to the start of a block. Does
1235 not check for consistency of block types. Interactively, pushes
1236 mark before moving point."
1238 (if (interactive-p) (push-mark (point) t))
1239 (and num (< num 0) (fortran-beginning-of-block (- num)))
1240 (let ((case-fold-search t)
1243 (while (and (> count 0)
1245 (concat "\\(" fortran-blocks-re
1246 (if fortran-check-all-num-for-matching-do
1247 "\\|^[ \t]*[0-9]+" "")
1248 "\\|continue\\|end\\)\\>")
1251 (if (if (looking-at (concat "^[0-9 \t]*" fortran-if-start-re))
1252 (fortran-looking-at-if-then)
1253 (looking-at fortran-start-block-re))
1254 (setq count (1+ count))
1255 (if (or (looking-at fortran-end-block-re)
1256 (and (or (looking-at "^[0-9 \t]*continue")
1257 (and fortran-check-all-num-for-matching-do
1258 (looking-at "[ \t]*[0-9]+")))
1259 (fortran-check-for-matching-do)))
1260 (setq count (1- count))))
1262 (if (> count 0) (error "Missing block end"))))
1264 (defun fortran-beginning-of-block (&optional num)
1265 "Move point backwards to the start of the current code block.
1266 With optional argument NUM, go backward that many balanced
1267 blocks. If NUM is negative, go forward to the end of a block.
1268 Does not check for consistency of block types. Interactively,
1269 pushes mark before moving point."
1271 (if (interactive-p) (push-mark (point) t))
1272 (and num (< num 0) (fortran-end-of-block (- num)))
1273 (let ((case-fold-search t)
1276 (while (and (> count 0)
1278 (concat "\\(" fortran-blocks-re
1279 (if fortran-check-all-num-for-matching-do
1280 "\\|^[ \t]*[0-9]+" "")
1281 "\\|continue\\|end\\)\\>")
1284 (if (if (looking-at (concat "^[0-9 \t]*" fortran-if-start-re))
1285 (fortran-looking-at-if-then)
1286 (looking-at fortran-start-block-re))
1287 (setq count (1- count))
1288 (if (or (looking-at fortran-end-block-re)
1289 (and (or (looking-at "^[0-9 \t]*continue")
1290 (and fortran-check-all-num-for-matching-do
1291 (looking-at "[ \t]*[0-9]+")))
1292 (fortran-check-for-matching-do)))
1293 (setq count (1+ count)))))
1294 ;; Includes an un-named main program block.
1295 (if (> count 0) (error "Missing block start"))))
1298 (defun fortran-blink-match (regex keyword find-begin)
1299 "From a line matching REGEX, blink matching KEYWORD statement line.
1300 Use function FIND-BEGIN to match it."
1301 (let ((top-of-window (window-start))
1303 (case-fold-search t)
1306 (when (save-excursion
1308 (skip-chars-forward " \t0-9")
1310 (if (not (setq matching (funcall find-begin)))
1311 (setq message (concat "No matching " keyword "."))
1312 (if (< matching top-of-window)
1314 (goto-char matching)
1318 (buffer-substring (point)
1319 (line-end-position)))))))
1321 (message "%s" message)
1322 (goto-char matching)
1323 (sit-for blink-matching-delay)
1324 (goto-char end-point)))))
1326 (defun fortran-blink-matching-if ()
1327 "From an ENDIF or ELSE statement, blink the matching IF statement."
1328 (fortran-blink-match "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"
1329 "if" #'fortran-beginning-if))
1331 (defun fortran-blink-matching-do ()
1332 "From an ENDDO statement, blink the matching DO or DO WHILE statement."
1333 (fortran-blink-match "end[ \t]*do\\b" "do" #'fortran-beginning-do))
1335 (defun fortran-mark-do ()
1336 "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
1337 The marks are pushed."
1339 (let (enddo-point do-point)
1340 (if (setq enddo-point (fortran-end-do))
1341 (if (not (setq do-point (fortran-beginning-do)))
1342 (message "No matching do.")
1343 (goto-char enddo-point)
1345 (goto-char do-point)))))
1347 (defun fortran-end-do ()
1348 "Search forward for first unmatched ENDDO.
1349 Return point or nil."
1350 (let ((case-fold-search t))
1351 (if (save-excursion (beginning-of-line)
1352 (skip-chars-forward " \t0-9")
1353 (looking-at "end[ \t]*do\\b"))
1359 (while (and (not (zerop count))
1360 (not (eq (fortran-next-statement) 'last-statement))
1361 ;; Keep local to subprogram.
1362 (not (and (looking-at fortran-end-prog-re)
1363 (fortran-check-end-prog-re))))
1364 (skip-chars-forward " \t0-9")
1365 (cond ((looking-at "end[ \t]*do\\b")
1366 (setq count (1- count)))
1368 "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
1369 (setq count (1+ count)))))
1371 ;; All pairs accounted for.
1374 (defun fortran-beginning-do ()
1375 "Search backwards for first unmatched DO [WHILE].
1376 Return point or nil. Ignores labelled DO loops (ie DO 10 ... 10 CONTINUE)."
1377 (let ((case-fold-search t)
1378 (dostart-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]"))
1381 (skip-chars-forward " \t0-9")
1382 (looking-at dostart-re))
1388 (while (and (not (zerop count))
1389 (not (eq (fortran-previous-statement) 'first-statement))
1390 ;; Keep local to subprogram.
1391 (not (and (looking-at fortran-end-prog-re)
1392 (fortran-check-end-prog-re))))
1393 (skip-chars-forward " \t0-9")
1394 (cond ((looking-at dostart-re)
1395 (setq count (1- count)))
1396 ;; Note labelled loop ends not considered.
1397 ((looking-at "end[ \t]*do\\b")
1398 (setq count (1+ count)))))
1400 ;; All pairs accounted for.
1403 (defun fortran-mark-if ()
1404 "Put mark at end of Fortran IF-ENDIF construct, point at beginning.
1405 The marks are pushed."
1407 (let (endif-point if-point)
1408 (if (setq endif-point (fortran-end-if))
1409 (if (not (setq if-point (fortran-beginning-if)))
1410 (message "No matching if.")
1411 ;; Set mark, move point.
1412 (goto-char endif-point)
1414 (goto-char if-point)))))
1416 (defun fortran-end-if ()
1417 "Search forwards for first unmatched ENDIF.
1418 Return point or nil."
1419 (let ((case-fold-search t))
1420 (if (save-excursion (beginning-of-line)
1421 (skip-chars-forward " \t0-9")
1422 (looking-at "end[ \t]*if\\b"))
1425 ;; Search for one. The point has been already been moved to first
1426 ;; letter on line but this should not cause troubles.
1429 (while (and (not (zerop count))
1430 (not (eq (fortran-next-statement) 'last-statement))
1431 ;; Keep local to subprogram.
1432 (not (and (looking-at fortran-end-prog-re)
1433 (fortran-check-end-prog-re))))
1434 (skip-chars-forward " \t0-9")
1435 (cond ((looking-at "end[ \t]*if\\b")
1436 (setq count (1- count)))
1437 ((looking-at fortran-if-start-re)
1440 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1441 (let (then-test) ; multi-line if-then
1444 (zerop (forward-line 1))
1445 ;; Search forward for then.
1446 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1450 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1452 (setq count (1+ count)))))))
1454 ;; All pairs accounted for.
1457 (defun fortran-beginning-if ()
1458 "Search backwards for first unmatched IF-THEN.
1459 Return point or nil."
1460 (let ((case-fold-search t))
1462 ;; May be sitting on multi-line if-then statement, first
1463 ;; move to beginning of current statement. Note:
1464 ;; `fortran-previous-statement' moves to previous statement
1465 ;; *unless* current statement is first one. Only move
1466 ;; forward if not first-statement.
1467 (if (not (eq (fortran-previous-statement) 'first-statement))
1468 (fortran-next-statement))
1469 (skip-chars-forward " \t0-9")
1471 (looking-at fortran-if-start-re)
1473 (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1474 ;; Multi-line if-then.
1477 (and (zerop (forward-line 1))
1478 ;; Search forward for then.
1479 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1483 ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
1490 (while (and (not (zerop count))
1491 (not (eq (fortran-previous-statement) 'first-statement))
1492 ;; Keep local to subprogram.
1493 (not (and (looking-at fortran-end-prog-re)
1494 (fortran-check-end-prog-re))))
1495 (skip-chars-forward " \t0-9")
1496 (cond ((looking-at fortran-if-start-re)
1499 (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
1500 (let (then-test) ; multi-line if-then
1503 (zerop (forward-line 1))
1504 ;; Search forward for then.
1505 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1509 (concat ".*then\\b[ \t]*"
1510 "[^ \t(=a-z0-9]"))))))
1512 (setq count (1- count)))))
1513 ((looking-at "end[ \t]*if\\b")
1514 (setq count (1+ count)))))
1516 ;; All pairs accounted for.
1520 (defun fortran-indent-line ()
1521 "Indent current Fortran line based on its contents and on previous lines."
1523 (let ((cfi (fortran-calculate-indent)))
1526 (if (or (not (= cfi (fortran-current-line-indentation)))
1527 (and (re-search-forward "^[ \t]*[0-9]+" (+ (point) 4) t)
1528 (not (fortran-line-number-indented-correctly-p))))
1529 (fortran-indent-to-column cfi)
1531 (if (fortran-find-comment-start-skip)
1532 (fortran-indent-comment))))
1533 ;; Never leave point in left margin.
1534 (if (< (current-column) cfi)
1535 (move-to-column cfi))
1536 (and auto-fill-function
1537 (> (save-excursion (end-of-line) (current-column))
1542 (when fortran-blink-matching-if
1543 (fortran-blink-matching-if)
1544 (fortran-blink-matching-do))))
1546 (defun fortran-auto-fill ()
1547 "Function to use for `normal-auto-fill-function' in Fortran mode."
1548 (if (> (current-column) (current-fill-column))
1549 (let ((cfi (fortran-calculate-indent)))
1552 (if (or (not (= cfi (fortran-current-line-indentation)))
1553 (and (re-search-forward "^[ \t]*[0-9]+"
1555 (not (fortran-line-number-indented-correctly-p))))
1556 (fortran-indent-to-column cfi)
1558 (if (fortran-find-comment-start-skip)
1559 (fortran-indent-comment))))
1561 ;; Never leave point in left margin.
1562 (if (< (current-column) cfi)
1563 (move-to-column cfi)))))
1565 ;; Historically this was a separate function which advertised itself
1566 ;; as reindenting but only did so where `most likely to be necessary'.
1567 (defalias 'fortran-indent-new-line 'reindent-then-newline-and-indent)
1569 (defun fortran-indent-subprogram ()
1570 "Properly indent the Fortran subprogram containing point."
1574 (message "Indenting subprogram...")
1575 (indent-region (point) (mark) nil))
1576 (message "Indenting subprogram...done."))
1578 (defun fortran-calculate-indent ()
1579 "Calculates the Fortran indent column based on previous lines."
1580 (let (icol first-statement (case-fold-search t)
1581 (fortran-minimum-statement-indent
1582 (if indent-tabs-mode
1583 fortran-minimum-statement-indent-tab
1584 fortran-minimum-statement-indent-fixed)))
1586 (setq first-statement (fortran-previous-statement))
1588 (setq icol fortran-minimum-statement-indent)
1589 (if (= (point) (point-min))
1590 (setq icol fortran-minimum-statement-indent)
1591 (setq icol (fortran-current-line-indentation)))
1592 (skip-chars-forward " \t0-9")
1593 (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
1594 (if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
1595 (let (then-test) ; multi-line if-then
1596 (while (and (zerop (forward-line 1))
1597 ;; Search forward for then.
1598 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]")
1599 (not (setq then-test
1602 *[^ \t_$(=a-z0-9]")))))
1604 (setq icol (+ icol fortran-if-indent))))
1605 ((looking-at "else\\(if\\)?\\b")
1606 (setq icol (+ icol fortran-if-indent)))
1607 ((looking-at "select[ \t]*case[ \t](.*)")
1608 (setq icol (+ icol fortran-if-indent)))
1609 ((looking-at "case[ \t]*(.*)")
1610 (setq icol (+ icol fortran-if-indent)))
1611 ((looking-at "case[ \t]*default\\b")
1612 (setq icol (+ icol fortran-if-indent)))
1613 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1614 (setq icol (+ icol fortran-if-indent)))
1615 ((looking-at "where[ \t]*(.*)[ \t]*\n")
1616 (setq icol (+ icol fortran-if-indent)))
1617 ((looking-at "do\\b")
1618 (setq icol (+ icol fortran-do-indent)))
1620 "\\(structure\\|union\\|map\\|interface\\)\
1621 \\b[ \t]*[^ \t=(a-z]")
1622 (setq icol (+ icol fortran-structure-indent)))
1623 ((and (looking-at fortran-end-prog-re1)
1624 (fortran-check-end-prog-re))
1625 ;; Previous END resets indent to minimum.
1626 (setq icol fortran-minimum-statement-indent)))))
1629 (cond ((looking-at "[ \t]*$"))
1630 ;; Check for directive before comment, so as not to indent.
1631 ((looking-at fortran-directive-re)
1632 (setq fortran-minimum-statement-indent 0 icol 0))
1633 ((looking-at fortran-comment-line-start-skip)
1634 (cond ((eq fortran-comment-indent-style 'relative)
1635 (setq icol (+ icol fortran-comment-line-extra-indent)))
1636 ((eq fortran-comment-indent-style 'fixed)
1637 (setq icol (+ fortran-minimum-statement-indent
1638 fortran-comment-line-extra-indent))))
1639 (setq fortran-minimum-statement-indent 0))
1640 ((or (looking-at (concat "[ \t]*"
1642 fortran-continuation-string)))
1643 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1644 (skip-chars-forward " \t")
1645 ;; Do not introduce extra whitespace into a broken string.
1647 (if (fortran-is-in-string-p (point))
1649 (+ icol fortran-continuation-indent))))
1651 ((and fortran-check-all-num-for-matching-do
1652 (looking-at "[ \t]*[0-9]+")
1653 (fortran-check-for-matching-do))
1654 (setq icol (- icol fortran-do-indent)))
1656 (skip-chars-forward " \t0-9")
1657 (cond ((looking-at "end[ \t]*\\(if\\|select\\|where\\)\\b")
1658 (setq icol (- icol fortran-if-indent)))
1659 ((looking-at "else\\(if\\)?\\b")
1660 (setq icol (- icol fortran-if-indent)))
1661 ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
1662 (setq icol (- icol fortran-if-indent)))
1663 ((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
1664 (setq icol (- icol fortran-if-indent)))
1665 ((and (looking-at "continue\\b")
1666 (fortran-check-for-matching-do))
1667 (setq icol (- icol fortran-do-indent)))
1668 ((looking-at "end[ \t]*do\\b")
1669 (setq icol (- icol fortran-do-indent)))
1670 ((looking-at "end[ \t]*\
1671 \\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
1672 (setq icol (- icol fortran-structure-indent)))
1673 ((and (looking-at fortran-end-prog-re1)
1674 (fortran-check-end-prog-re)
1675 (not (= icol fortran-minimum-statement-indent)))
1676 (message "Warning: `end' not in column %d. Probably\
1677 an unclosed block." fortran-minimum-statement-indent))))))
1678 (max fortran-minimum-statement-indent icol)))
1681 (defun fortran-current-line-indentation ()
1682 "Indentation of current line, ignoring Fortran line number or continuation.
1683 This is the column position of the first non-whitespace character
1684 aside from the line number and/or column 5/8 line-continuation character.
1685 For comment lines, returns indentation of the first
1686 non-indentation text within the comment."
1689 (cond ((looking-at fortran-comment-line-start-skip)
1690 (goto-char (match-end 0))
1692 (if (stringp fortran-comment-indent-char)
1693 fortran-comment-indent-char
1694 (char-to-string fortran-comment-indent-char))))
1695 ((or (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1696 (goto-char (match-end 0)))
1698 ;; Move past line number.
1699 (skip-chars-forward "[ \t0-9]")))
1700 ;; Move past whitespace.
1701 (skip-chars-forward " \t")
1704 (defun fortran-indent-to-column (col)
1705 "Indent current line to column COL.
1706 notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
1707 line, and this continuation character is retained on indentation;
1708 2) If `fortran-continuation-string' is the first non-whitespace
1709 character, this is a continuation line;
1710 3) A non-continuation line which has a number as the first
1711 non-whitespace character is a numbered line.
1712 4) A TAB followed by a digit indicates a continuation line."
1715 (if (looking-at fortran-comment-line-start-skip)
1716 (if fortran-comment-indent-style
1717 (let* ((char (if (stringp fortran-comment-indent-char)
1718 (aref fortran-comment-indent-char 0)
1719 fortran-comment-indent-char))
1720 (chars (string ?\s ?\t char)))
1721 (goto-char (match-end 0))
1722 (skip-chars-backward chars)
1723 (delete-region (point) (progn (skip-chars-forward chars)
1725 (insert-char char (- col (current-column)))))
1726 (if (looking-at "\t[1-9]")
1727 (if indent-tabs-mode
1728 (goto-char (match-end 0))
1731 (insert fortran-continuation-string))
1732 (if (looking-at " \\{5\\}[^ 0\n]")
1733 (if indent-tabs-mode
1734 (progn (delete-char 6)
1735 (insert ?\t (fortran-numerical-continuation-char) 1))
1737 (delete-horizontal-space)
1738 ;; Put line number in columns 0-4, or
1739 ;; continuation character in column 5.
1741 ((looking-at (regexp-quote fortran-continuation-string))
1742 (if indent-tabs-mode
1745 (if indent-tabs-mode
1746 fortran-minimum-statement-indent-tab
1747 fortran-minimum-statement-indent-fixed))
1749 (insert-char (fortran-numerical-continuation-char) 1))
1752 ((looking-at "[0-9]+")
1753 (let ((extra-space (- 5 (- (match-end 0) (point)))))
1754 (if (< extra-space 0)
1755 (message "Warning: line number exceeds 5-digit limit.")
1756 (indent-to (min fortran-line-number-indent extra-space))))
1757 (skip-chars-forward "0-9")))))
1758 ;; Point is now after any continuation character or line number.
1759 ;; Put body of statement where specified.
1760 (delete-horizontal-space)
1762 ;; Indent any comment following code on the same line.
1763 (when (fortran-find-comment-start-skip)
1764 (goto-char (match-beginning 0))
1765 (unless (= (current-column) (fortran-comment-indent))
1766 (delete-horizontal-space)
1767 (indent-to (fortran-comment-indent)))))))
1769 (defun fortran-line-number-indented-correctly-p ()
1770 "Return t if current line's line number is correctly indented.
1771 Do not call if there is no line number."
1774 (skip-chars-forward " \t")
1775 (and (<= (current-column) fortran-line-number-indent)
1776 (or (= (current-column) fortran-line-number-indent)
1777 (progn (skip-chars-forward "0-9")
1778 (= (current-column) 5))))))
1780 (defun fortran-check-for-matching-do ()
1781 "When called from a numbered statement, return t if matching DO is found.
1782 Otherwise return nil."
1783 (let ((case-fold-search t)
1787 (when (looking-at "[ \t]*[0-9]+")
1788 (skip-chars-forward " \t")
1789 (skip-chars-forward "0") ; skip past leading zeros
1791 (buffer-substring (point) (progn
1792 (skip-chars-forward "0-9")
1798 (and (re-search-backward
1800 "\\(^[ \t0-9]*do[ \t]*0*"
1801 charnum "\\b\\)\\|" "\\(^[ \t]*0*"
1805 (concat "^[ \t0-9]*do[ \t]*0*"
1808 (defun fortran-find-comment-start-skip (&optional all)
1809 "Move to past `comment-start-skip' found on current line.
1810 Return non-nil if `comment-start-skip' found, nil if not.
1811 If ALL is nil, only match comments that start in column > 0."
1812 ;; Hopefully at some point we can just use the line below! -stef
1813 ;; (comment-search-forward (line-end-position) t))
1814 (when (or all comment-start-skip)
1816 (css (if comment-start-skip
1817 (concat fortran-comment-line-start-skip
1818 "\\|" comment-start-skip)
1819 fortran-comment-line-start-skip)))
1820 (when (re-search-forward css (line-end-position) t)
1821 (if (and (or all (> (match-beginning 0) (line-beginning-position)))
1822 (or (save-match-data
1823 (not (fortran-is-in-string-p (match-beginning 0))))
1824 ;; Recurse for rest of line.
1825 (fortran-find-comment-start-skip all)))
1830 ;; From: ralf@up3aud1.gwdg.de (Ralf Fassel)
1831 ;; Test if TAB format continuation lines work.
1832 (defun fortran-is-in-string-p (where)
1833 "Return non-nil if WHERE (a buffer position) is inside a Fortran string."
1837 ((bolp) nil) ; bol is never inside a string
1838 ((save-excursion ; comment lines too
1840 (looking-at fortran-comment-line-start-skip)) nil)
1841 (t (let ((parse-state '(0 nil nil nil nil nil 0))
1842 (quoted-comment-start (if comment-start
1843 (regexp-quote comment-start)))
1845 parse-limit end-of-line)
1846 ;; Move to start of current statement.
1847 (fortran-next-statement)
1848 (fortran-previous-statement)
1849 ;; Now parse up to WHERE.
1851 (if (or ;; Skip to next line if:
1853 (looking-at fortran-comment-line-start-skip)
1854 ;; - at end of line?
1856 ;; - not in a string and after comment-start?
1857 (and (not (nth 3 parse-state))
1859 (equal comment-start
1860 (char-to-string (preceding-char)))))
1861 (if (> (forward-line) 0)
1862 (setq not-done nil))
1864 ;; If we are at beginning of code line, skip any
1865 ;; whitespace, labels and tab continuation markers.
1866 (if (bolp) (skip-chars-forward " \t0-9"))
1867 ;; If we are in column <= 5 now, check for continuation char.
1868 (cond ((= 5 (current-column)) (forward-char 1))
1869 ((and (< (current-column) 5)
1870 (equal fortran-continuation-string
1871 (char-to-string (following-char)))
1873 ;; Find out parse-limit from here.
1874 (setq end-of-line (line-end-position))
1875 (setq parse-limit (min where end-of-line))
1876 ;; Parse max up to comment-start, if non-nil and in current line.
1879 (if (re-search-forward quoted-comment-start end-of-line t)
1880 (setq parse-limit (min (point) parse-limit)))))
1881 ;; Now parse if still in limits.
1882 (if (< (point) where)
1883 (setq parse-state (parse-partial-sexp
1884 (point) parse-limit nil nil parse-state))
1885 (setq not-done nil))))
1887 (nth 3 parse-state))))))
1889 ;; From old version.
1890 (defalias 'fortran-auto-fill-mode 'auto-fill-mode)
1892 (defun fortran-fill ()
1893 "Fill the current line at an appropriate point(s)."
1894 (let* ((auto-fill-function #'fortran-auto-fill)
1896 (bol (line-beginning-position))
1897 (eol (line-end-position))
1898 (bos (min eol (+ bol (fortran-current-line-indentation))))
1899 ;; If in a string at fill-column, break it either before the
1900 ;; initial quote, or at fill-col (if string is too long).
1904 ;; OK to break quotes on comment lines.
1905 (unless (looking-at fortran-comment-line-start-skip)
1906 (let (fcpoint start)
1907 (move-to-column fill-column)
1908 (when (fortran-is-in-string-p (setq fcpoint (point)))
1910 (re-search-backward "\\S\"\\s\"\\S\"?" bol t)
1912 (if fortran-break-before-delimiters
1915 (if (re-search-forward "\\S\"\\s\"\\S\"" eol t)
1917 ;; If the current string is longer than (fill-column
1918 ;; - 6) chars, break it at the fill column (else
1920 (if (> (- (point) start)
1921 (- fill-column 6 fortran-continuation-indent))
1924 ;; Decide where to split the line. If a position for a quoted
1925 ;; string was found above then use that, else break the line
1926 ;; before/after the last delimiter.
1930 ;; If f-b-b-d is t, have an extra column to play with,
1931 ;; since delimiter gets shifted to new line.
1932 (move-to-column (if fortran-break-before-delimiters
1938 ;; Adapted from f90-find-breakpoint.
1939 (re-search-backward fortran-break-delimiters-re bol)
1940 (if (not fortran-break-before-delimiters)
1941 (if (looking-at fortran-no-break-re)
1942 ;; Deal with cases such as "**" split over
1943 ;; fill-col. Simpler alternative would be
1944 ;; to start from (1- fill-column) above.
1945 (if (> (+ 2 (current-column)) fill-column)
1950 (or (looking-at fortran-no-break-re)
1952 ;; Line indented beyond fill-column?
1953 (when (<= (point) bos)
1954 (move-to-column (1+ fill-column))
1955 ;; What is this doing???
1956 (or (re-search-forward "[\t\n,'+-/*)=]" eol t)
1959 (re-search-forward "[ \t]" opoint t))
1961 ;; If we are in an in-line comment, don't break unless the
1962 ;; line of code is longer than it should be. Otherwise
1963 ;; break the line at the column computed above.
1965 ;; Need to use fortran-find-comment-start-skip to make sure that
1966 ;; quoted !'s don't prevent a break.
1967 (when (and (save-excursion
1969 (if (not (fortran-find-comment-start-skip))
1971 (goto-char (match-beginning 0))
1972 (>= (point) fill-point)))
1974 (goto-char fill-point)
1979 (min (1+ fill-column)
1980 (+ (fortran-calculate-indent)
1981 fortran-continuation-indent))))
1982 (goto-char fill-point)
1983 (fortran-break-line)
1986 (defun fortran-break-line ()
1987 "Call `fortran-split-line'. Joins continuation lines first, then refills."
1988 (let ((bol (line-beginning-position))
1991 (if (fortran-find-comment-start-skip)
1992 (delete-and-extract-region
1993 (match-beginning 0) (line-end-position))))))
1994 ;; Forward line 1 really needs to go to next non white line.
1995 (if (save-excursion (forward-line)
1996 (looking-at " \\{5\\}[^ 0\n]\\|\t[1-9]"))
1999 (delete-region (point) (match-end 0))
2000 (delete-horizontal-space)
2002 (fortran-split-line))
2007 (delete-horizontal-space)
2008 (indent-to (fortran-comment-indent))
2009 (insert comment-string)))))
2011 (defun fortran-analyze-file-format ()
2012 "Return nil if fixed format is used, t if TAB formatting is used.
2013 Use `fortran-tab-mode-default' if no non-comment statements are found
2014 before the end or in the first `fortran-analyze-depth' lines."
2017 (goto-char (point-min))
2020 (eq (char-after) ?\t)
2021 (looking-at " \\{6\\}")
2022 (> i fortran-analyze-depth)))
2026 ((eq (char-after) ?\t) t)
2027 ((looking-at " \\{6\\}") nil)
2028 (t fortran-tab-mode-default)))))
2030 (defun fortran-fill-paragraph (&optional justify)
2031 "Fill surrounding comment block as paragraphs, else fill statement.
2032 Intended as the value of `fill-paragraph-function'.
2033 A comment block is filled by calling `fill-comment-paragraph' with
2034 argument JUSTIFY, otherwise `fortran-fill-statement' is called.
2035 Always returns non-nil (to prevent `fill-paragraph' being called)."
2037 (or (fill-comment-paragraph justify)
2038 (fortran-fill-statement)
2041 (defun fortran-fill-statement ()
2042 "Fill a Fortran statement up to `fill-column'."
2044 (let ((auto-fill-function #'fortran-auto-fill))
2045 (unless (save-excursion
2047 (or (looking-at "[ \t]*$")
2048 (looking-at fortran-comment-line-start-skip)
2049 (and comment-start-skip
2050 (looking-at (concat "[ \t]*" comment-start-skip)))))
2052 ;; Find beginning of statement.
2053 (fortran-next-statement)
2054 (fortran-previous-statement)
2055 ;; Re-indent initially.
2056 (fortran-indent-line)
2057 ;; Replace newline plus continuation field plus indentation with
2061 (fortran-remove-continuation)))
2062 (fortran-previous-statement)))
2063 (fortran-indent-line)))
2065 (defun fortran-strip-sequence-nos (&optional do-space)
2066 "Delete all text in column `fortran-line-length' (default 72) and up.
2067 This is assumed to be sequence numbers. Normally also deletes
2068 trailing whitespace after stripping such text. Supplying prefix
2069 arg DO-SPACE prevents stripping the whitespace."
2072 (goto-char (point-min))
2073 (while (re-search-forward (format "^.\\{%d\\}\\(.*\\)" fortran-line-length)
2075 (replace-match "" nil nil nil 1)
2076 (unless do-space (delete-horizontal-space)))))
2078 ;; This code used to live in add-log.el, but this is a better place
2080 (defun fortran-current-defun ()
2081 "Function to use for `add-log-current-defun-function' in Fortran mode."
2083 ;; We must be inside function body for this to work.
2084 (fortran-beginning-of-subprogram)
2085 (let ((case-fold-search t)) ; case-insensitive
2086 ;; Search for fortran subprogram start.
2087 (if (re-search-forward
2088 (concat "^[ \t]*\\(program\\|subroutine\\|function"
2089 "\\|[ \ta-z0-9*()]*[ \t]+function\\|"
2090 "\\(block[ \t]*data\\)\\)")
2091 (save-excursion (fortran-end-of-subprogram)
2094 (or (match-string-no-properties 2)
2096 ;; Move to EOL or before first left paren.
2097 (if (re-search-forward "[(\n]" nil t)
2098 (progn (backward-char)
2099 (skip-chars-backward " \t"))
2101 ;; Use the name preceding that.
2102 (buffer-substring-no-properties (point) (progn (backward-sexp)
2108 ;; arch-tag: 74935096-21c4-4cab-8ee5-6ef16090dc04
2109 ;;; fortran.el ends here