1 ;;; f90.el --- Fortran-90 mode (free format)
3 ;; Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
5 ;; Author: Torbj\"orn Einarsson <Torbjorn.Einarsson@era.ericsson.se>
6 ;; Maintainer: Glenn Morris <gmorris@ast.cam.ac.uk>
7 ;; Keywords: fortran, f90, languages
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
16 ;; GNU Emacs is distributed in the hope that it will be useful,
17 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 ;; GNU General Public License for more details.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
24 ;; Boston, MA 02111-1307, USA.
28 ;; Major mode for editing F90 programs in FREE FORMAT.
29 ;; The minor language revision F95 is also supported (with font-locking).
31 ;; Knows about continuation lines, named structured statements, and other
32 ;; features in F90 including HPF (High Performance Fortran) structures.
33 ;; The basic feature provides accurate indentation of F90 programs.
34 ;; In addition, there are many more features like automatic matching of all
35 ;; end statements, an auto-fill function to break long lines, a join-lines
36 ;; function which joins continued lines, etc.
38 ;; To facilitate typing, a fairly complete list of abbreviations is provided.
39 ;; All abbreviations begin with the backquote character "`"
40 ;; (this requires modification of the syntax-table).
41 ;; For example, `i expands to integer (if abbrev-mode is on).
43 ;; There are two separate features for altering the appearance of code:
44 ;; 1) Upcasing or capitalizing of all keywords.
45 ;; 2) Colors/fonts using font-lock-mode.
46 ;; Automatic upcase or downcase of keywords is controlled by the variable
47 ;; f90-auto-keyword-case.
49 ;; The indentations of lines starting with ! is determined by the first of the
50 ;; following matches (values in the left column are the defaults):
52 ;; start-string/regexp indent variable holding start-string/regexp
54 ;; !hpf\\$ (re) 0 f90-directive-comment-re
55 ;; !!$ 0 f90-comment-region
56 ;; ! (re) as code f90-indented-comment-re
57 ;; default comment-column
59 ;; Ex: Here is the result of 3 different settings of f90-indented-comment-re
60 ;; f90-indented-comment-re !-indentation !!-indentation
62 ;; !! comment-column as code
63 ;; ![^!] as code comment-column
64 ;; Trailing comments are indented to comment-column with indent-for-comment.
65 ;; The function f90-comment-region toggles insertion of
66 ;; the variable f90-comment-region in every line of the region.
68 ;; One common convention for free vs. fixed format is that free-format files
69 ;; have the ending .f90 or .f95 while fixed format files have the ending .f.
70 ;; Emacs automatically loads Fortran files in the appropriate mode based
71 ;; on extension. You can modify this by adjusting the variable auto-mode-alist.
73 ;; (add-to-list 'auto-mode-alist '("\\.f\\'" . f90-mode))
75 ;; Once you have entered f90-mode, you may get more info by using
76 ;; the command describe-mode (C-h m). For online help use
77 ;; C-h f <Name of function you want described>, or
78 ;; C-h v <Name of variable you want described>.
80 ;; To customize f90-mode for your taste, use, for example:
81 ;; (you don't have to specify values for all the parameters below)
83 ;;(add-hook 'f90-mode-hook
84 ;; ;; These are the default values.
85 ;; '(lambda () (setq f90-do-indent 3
88 ;; f90-program-indent 2
89 ;; f90-continuation-indent 5
90 ;; f90-comment-region "!!$"
91 ;; f90-directive-comment-re "!hpf\\$"
92 ;; f90-indented-comment-re "!"
93 ;; f90-break-delimiters "[-+\\*/><=,% \t]"
94 ;; f90-break-before-delimiters t
95 ;; f90-beginning-ampersand t
96 ;; f90-smart-end 'blink
97 ;; f90-auto-keyword-case nil
98 ;; f90-leave-line-no nil
99 ;; indent-tabs-mode nil
100 ;; f90-font-lock-keywords f90-font-lock-keywords-2
102 ;; ;; These are not default.
103 ;; (abbrev-mode 1) ; turn on abbreviation mode
104 ;; (f90-add-imenu-menu) ; extra menu with functions etc.
105 ;; (if f90-auto-keyword-case ; change case of all keywords on startup
106 ;; (f90-change-keywords f90-auto-keyword-case))
109 ;; in your .emacs file. You can also customize the lists
110 ;; f90-font-lock-keywords, etc.
112 ;; The auto-fill and abbreviation minor modes are accessible from the F90 menu,
113 ;; or by using M-x auto-fill-mode and M-x abbrev-mode, respectively.
116 ;; 1) Line numbers are by default left-justified. If f90-leave-line-no is
117 ;; non-nil, the line numbers are never touched.
118 ;; 2) Multi-; statements like "do i=1,20 ; j=j+i ; end do" are not handled
119 ;; correctly, but I imagine them to be rare.
120 ;; 3) Regexps for hilit19 are no longer supported.
121 ;; 4) For FIXED FORMAT code, use fortran mode.
122 ;; 5) This mode does not work under emacs-18.x.
123 ;; 6) Preprocessor directives, i.e., lines starting with # are left-justified
124 ;; and are untouched by all case-changing commands. There is, at present, no
125 ;; mechanism for treating multi-line directives (continued by \ ).
126 ;; 7) f77 do-loops do 10 i=.. ; ; 10 continue are not correctly indented.
127 ;; You are urged to use f90-do loops (with labels if you wish).
128 ;; 8) The highlighting mode under XEmacs is not as complete as under Emacs.
130 ;; List of user commands
131 ;; f90-previous-statement f90-next-statement
132 ;; f90-beginning-of-subprogram f90-end-of-subprogram f90-mark-subprogram
133 ;; f90-comment-region
134 ;; f90-indent-line f90-indent-new-line
135 ;; f90-indent-region (can be called by calling indent-region)
136 ;; f90-indent-subprogram
137 ;; f90-break-line f90-join-lines
140 ;; f90-upcase-keywords f90-upcase-region-keywords
141 ;; f90-downcase-keywords f90-downcase-region-keywords
142 ;; f90-capitalize-keywords f90-capitalize-region-keywords
143 ;; f90-add-imenu-menu
144 ;; f90-font-lock-1, f90-font-lock-2, f90-font-lock-3, f90-font-lock-4
146 ;; Original author's thanks
147 ;; Thanks to all the people who have tested the mode. Special thanks to Jens
148 ;; Bloch Helmers for encouraging me to write this code, for creative
149 ;; suggestions as well as for the lists of hpf-commands.
150 ;; Also thanks to the authors of the fortran and pascal modes, on which some
151 ;; of this code is built.
154 ;; Support for hideshow, align.
155 ;; OpenMP, preprocessor highlighting.
160 (defconst f90-xemacs-flag (string-match "XEmacs\\|Lucid" emacs-version)
161 "Non-nil means F90 mode thinks it is running under XEmacs."))
163 ;; Most of these are just to quieten the byte-compiler.
165 (defvar comment-auto-fill-only-comments)
166 (defvar font-lock-keywords)
167 (unless f90-xemacs-flag
168 ;; If you have GNU Emacs 19.22 or earlier, comment this out, or get imenu.
170 (defvar current-menubar)))
175 "Major mode for editing Fortran 90,95 code."
178 (defgroup f90-indent nil
179 "Indentation in free-format Fortran."
184 (defcustom f90-do-indent 3
185 "*Extra indentation applied to DO blocks."
189 (defcustom f90-if-indent 3
190 "*Extra indentation applied to IF, SELECT CASE, WHERE and FORALL blocks."
194 (defcustom f90-type-indent 3
195 "*Extra indentation applied to TYPE, INTERFACE and BLOCK DATA blocks."
199 (defcustom f90-program-indent 2
200 "*Extra indentation applied to PROGRAM/MODULE/SUBROUTINE/FUNCTION blocks."
204 (defcustom f90-continuation-indent 5
205 "*Extra indentation applied to F90 continuation lines."
209 (defcustom f90-comment-region "!!$"
210 "*String inserted by \\[f90-comment-region] at start of each line in region."
214 (defcustom f90-indented-comment-re "!"
215 "*Regexp saying which comments to indent like code."
219 (defcustom f90-directive-comment-re "!hpf\\$"
220 "*Regexp of comment-like directive like \"!HPF\\\\$\", not to be indented."
224 (defcustom f90-beginning-ampersand t
225 "*Non-nil gives automatic insertion of \& at start of continuation line."
229 (defcustom f90-smart-end 'blink
230 "*From an END statement, check and fill the end using matching block start.
231 Allowed values are 'blink, 'no-blink, and nil, which determine
232 whether to blink the matching beginning."
233 :type '(choice (const blink) (const no-blink) (const nil))
236 (defcustom f90-break-delimiters "[-+\\*/><=,% \t]"
237 "*Regexp holding list of delimiters at which lines may be broken."
241 (defcustom f90-break-before-delimiters t
242 "*Non-nil causes `f90-do-auto-fill' to break lines before delimiters."
246 (defcustom f90-auto-keyword-case nil
247 "*Automatic case conversion of keywords.
248 The options are 'downcase-word, 'upcase-word, 'capitalize-word and nil."
249 :type '(choice (const downcase-word) (const upcase-word)
250 (const capitalize-word) (const nil))
253 (defcustom f90-leave-line-no nil
254 "*If non-nil, line numbers are not left justified."
258 (defcustom f90-mode-hook nil
259 "Hook run when entering F90 mode."
261 :options '(f90-add-imenu-menu)
264 ;; User options end here.
266 (defconst f90-keywords-re
267 (regexp-opt '("allocatable" "allocate" "assign" "assignment" "backspace"
268 "block" "call" "case" "character" "close" "common" "complex"
269 "contains" "continue" "cycle" "data" "deallocate"
270 "dimension" "do" "double" "else" "elseif" "elsewhere" "end"
271 "enddo" "endfile" "endif" "entry" "equivalence" "exit"
272 "external" "forall" "format" "function" "goto" "if"
273 "implicit" "include" "inquire" "integer" "intent"
274 "interface" "intrinsic" "logical" "module" "namelist" "none"
275 "nullify" "only" "open" "operator" "optional" "parameter"
276 "pause" "pointer" "precision" "print" "private" "procedure"
277 "program" "public" "read" "real" "recursive" "result" "return"
278 "rewind" "save" "select" "sequence" "stop" "subroutine"
279 "target" "then" "type" "use" "where" "while" "write"
281 "elemental" "pure") 'words)
282 "Regexp for F90 keywords.")
284 (defconst f90-keywords-level-3-re
286 '("allocatable" "allocate" "assign" "assignment" "backspace"
287 "close" "deallocate" "dimension" "endfile" "entry" "equivalence"
288 "external" "inquire" "intent" "intrinsic" "nullify" "only" "open"
289 "operator" "optional" "parameter" "pause" "pointer" "print" "private"
290 "public" "read" "recursive" "result" "rewind" "save" "select"
291 "sequence" "target" "write"
293 "elemental" "pure") 'words)
294 "Keyword-regexp for font-lock level >= 3.")
296 (defconst f90-procedures-re
299 '("abs" "achar" "acos" "adjustl" "adjustr" "aimag" "aint"
300 "all" "allocated" "anint" "any" "asin" "associated"
301 "atan" "atan2" "bit_size" "btest" "ceiling" "char" "cmplx"
302 "conjg" "cos" "cosh" "count" "cshift" "date_and_time" "dble"
303 "digits" "dim" "dot_product" "dprod" "eoshift" "epsilon"
304 "exp" "exponent" "floor" "fraction" "huge" "iachar" "iand"
305 "ibclr" "ibits" "ibset" "ichar" "ieor" "index" "int" "ior"
306 "ishft" "ishftc" "kind" "lbound" "len" "len_trim" "lge" "lgt"
307 "lle" "llt" "log" "log10" "logical" "matmul" "max"
308 "maxexponent" "maxloc" "maxval" "merge" "min" "minexponent"
309 "minloc" "minval" "mod" "modulo" "mvbits" "nearest" "nint"
310 "not" "pack" "precision" "present" "product" "radix"
311 ;; Real is taken out here to avoid highlighting declarations.
312 "random_number" "random_seed" "range" ;; "real"
313 "repeat" "reshape" "rrspacing" "scale" "scan"
314 "selected_int_kind" "selected_real_kind" "set_exponent"
315 "shape" "sign" "sin" "sinh" "size" "spacing" "spread" "sqrt"
316 "sum" "system_clock" "tan" "tanh" "tiny" "transfer"
317 "transpose" "trim" "ubound" "unpack" "verify"
318 ;; F95 intrinsic functions.
319 "null" "cpu_time") t)
320 ;; A left parenthesis to avoid highlighting non-procedures.
322 "Regexp whose first part matches F90 intrinsic procedures.")
324 (defconst f90-operators-re
326 (regexp-opt '("and" "eq" "eqv" "false" "ge" "gt" "le" "lt" "ne"
327 "neqv" "not" "or" "true") t)
329 "Regexp matching intrinsic operators.")
331 (defconst f90-hpf-keywords-re
333 ;; Intrinsic procedures.
334 '("all_prefix" "all_scatter" "all_suffix" "any_prefix"
335 "any_scatter" "any_suffix" "copy_prefix" "copy_scatter"
336 "copy_suffix" "count_prefix" "count_scatter" "count_suffix"
337 "grade_down" "grade_up"
338 "hpf_alignment" "hpf_distribution" "hpf_template" "iall" "iall_prefix"
339 "iall_scatter" "iall_suffix" "iany" "iany_prefix" "iany_scatter"
340 "iany_suffix" "ilen" "iparity" "iparity_prefix"
341 "iparity_scatter" "iparity_suffix" "leadz" "maxval_prefix"
342 "maxval_scatter" "maxval_suffix" "minval_prefix" "minval_scatter"
343 "minval_suffix" "number_of_processors" "parity"
344 "parity_prefix" "parity_scatter" "parity_suffix" "popcnt" "poppar"
345 "processors_shape" "product_prefix" "product_scatter"
346 "product_suffix" "sum_prefix" "sum_scatter" "sum_suffix"
348 "align" "distribute" "dynamic" "independent" "inherit" "processors"
349 "realign" "redistribute" "template"
351 "block" "cyclic" "extrinsic" "new" "onto" "pure" "with") 'words)
352 "Regexp for all HPF keywords, procedures and directives.")
354 ;; Highlighting patterns.
356 (defvar f90-font-lock-keywords-1
358 ;; Special highlighting of "module procedure".
359 '("\\<\\(module[ \t]*procedure\\)\\>" (1 font-lock-keyword-face))
360 ;; Highlight definition of derived type.
361 '("\\<\\(\\(?:end[ \t]*\\)?type\\)\\>\\([^()\n]*::\\)?[ \t]*\\(\\sw+\\)"
362 (1 font-lock-keyword-face) (3 font-lock-function-name-face))
363 ;; Other functions and declarations.
364 '("\\<\\(\\(?:end[ \t]*\\)?\\(program\\|module\\|function\\|\
365 subroutine\\)\\|use\\|call\\)\\>[ \t]*\\(\\sw+\\)?"
366 (1 font-lock-keyword-face) (3 font-lock-function-name-face nil t))
367 "\\<\\(\\(end[ \t]*\\)?\\(interface\\|block[ \t]*data\\)\\|contains\\)\\>")
368 "This does fairly subdued highlighting of comments and function calls.")
370 (defvar f90-font-lock-keywords-2
372 f90-font-lock-keywords-1
374 ;; Variable declarations (avoid the real function call).
375 '("^[ \t0-9]*\\(real\\|integer\\|c\\(haracter\\|omplex\\)\\|\
376 logical\\|type[ \t]*(\\sw+)\\)\\(.*::\\|[ \t]*(.*)\\)?\\([^!\n]*\\)"
377 (1 font-lock-type-face t) (4 font-lock-variable-name-face))
378 ;; do, if, select, where, and forall constructs.
379 '("\\<\\(end[ \t]*\\(do\\|if\\|select\\|forall\\|where\\)\\)\\>\
380 \\([ \t]+\\(\\sw+\\)\\)?"
381 (1 font-lock-keyword-face) (3 font-lock-constant-face nil t))
382 '("^[ \t0-9]*\\(\\(\\sw+\\)[ \t]*:[ \t]*\\)?\\(\\(if\\|\
383 do\\([ \t]*while\\)?\\|select[ \t]*case\\|where\\|forall\\)\\)\\>"
384 (2 font-lock-constant-face nil t) (3 font-lock-keyword-face))
385 ;; Implicit declaration.
386 '("\\<\\(implicit\\)[ \t]*\\(real\\|integer\\|c\\(haracter\\|omplex\\)\
387 \\|logical\\|type[ \t]*(\\sw+)\\|none\\)[ \t]*"
388 (1 font-lock-keyword-face) (2 font-lock-type-face))
389 '("\\<\\(namelist\\|common\\)[ \t]*\/\\(\\sw+\\)?\/"
390 (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
391 "\\<else\\([ \t]*if\\|where\\)?\\>"
392 "\\<\\(then\\|continue\\|format\\|include\\|stop\\|return\\)\\>"
393 '("\\<\\(exit\\|cycle\\)[ \t]*\\(\\sw+\\)?\\>"
394 (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
395 '("\\<\\(case\\)[ \t]*\\(default\\|(\\)" . 1)
396 '("\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)"
397 (1 font-lock-keyword-face) (2 font-lock-constant-face))
398 ;; Line numbers (lines whose first character after number is letter).
399 '("^[ \t]*\\([0-9]+\\)[ \t]*[a-z]+" (1 font-lock-constant-face t))))
400 "Highlights declarations, do-loops and other constructs.")
402 (defvar f90-font-lock-keywords-3
403 (append f90-font-lock-keywords-2
405 f90-keywords-level-3-re
407 (list f90-procedures-re '(1 font-lock-keyword-face keep))
408 "\\<real\\>" ; avoid overwriting real defs
410 "Highlights all F90 keywords and intrinsic procedures.")
412 (defvar f90-font-lock-keywords-4
413 (append f90-font-lock-keywords-3
414 (list f90-hpf-keywords-re))
415 "Highlights all F90 and HPF keywords.")
417 (defvar f90-font-lock-keywords
418 f90-font-lock-keywords-2
419 "*Default expressions to highlight in F90 mode.
420 Can be overridden by the value of `font-lock-maximum-decoration'.")
423 (defvar f90-mode-syntax-table
424 (let ((table (make-syntax-table)))
425 (modify-syntax-entry ?\! "<" table) ; begin comment
426 (modify-syntax-entry ?\n ">" table) ; end comment
427 (modify-syntax-entry ?_ "w" table) ; underscore in names
428 (modify-syntax-entry ?\' "\"" table) ; string quote
429 (modify-syntax-entry ?\" "\"" table) ; string quote
430 (modify-syntax-entry ?\` "w" table) ; for abbrevs
431 (modify-syntax-entry ?\r " " table) ; return is whitespace
432 (modify-syntax-entry ?+ "." table) ; punctuation
433 (modify-syntax-entry ?- "." table)
434 (modify-syntax-entry ?= "." table)
435 (modify-syntax-entry ?* "." table)
436 (modify-syntax-entry ?/ "." table)
437 (modify-syntax-entry ?\\ "\\" table) ; escape chars
439 "Syntax table used in F90 mode.")
442 (let ((map (make-sparse-keymap)))
443 (define-key map "`" 'f90-abbrev-start)
444 (define-key map "\C-c;" 'f90-comment-region)
445 (define-key map "\C-\M-a" 'f90-beginning-of-subprogram)
446 (define-key map "\C-\M-e" 'f90-end-of-subprogram)
447 (define-key map "\C-\M-h" 'f90-mark-subprogram)
448 (define-key map "\C-\M-n" 'f90-end-of-block)
449 (define-key map "\C-\M-p" 'f90-beginning-of-block)
450 (define-key map "\C-\M-q" 'f90-indent-subprogram)
451 (define-key map "\C-j" 'f90-indent-new-line) ; LFD equals C-j
452 (define-key map "\r" 'newline)
453 (define-key map "\C-c\r" 'f90-break-line)
454 ;;; (define-key map [M-return] 'f90-break-line)
455 (define-key map "\C-c\C-a" 'f90-previous-block)
456 (define-key map "\C-c\C-e" 'f90-next-block)
457 (define-key map "\C-c\C-d" 'f90-join-lines)
458 (define-key map "\C-c\C-f" 'f90-fill-region)
459 (define-key map "\C-c\C-p" 'f90-previous-statement)
460 (define-key map "\C-c\C-n" 'f90-next-statement)
461 (define-key map "\C-c\C-w" 'f90-insert-end)
462 (define-key map "\t" 'f90-indent-line)
463 (define-key map "," 'f90-electric-insert)
464 (define-key map "+" 'f90-electric-insert)
465 (define-key map "-" 'f90-electric-insert)
466 (define-key map "*" 'f90-electric-insert)
467 (define-key map "/" 'f90-electric-insert)
469 "Keymap used in F90 mode.")
473 (defvar f90-xemacs-menu
475 ["Indent Subprogram" f90-indent-subprogram t]
476 ["Mark Subprogram" f90-mark-subprogram t]
477 ["Beginning of Subprogram" f90-beginning-of-subprogram t]
478 ["End of Subprogram" f90-end-of-subprogram t]
480 ["(Un)Comment Region" f90-comment-region t]
481 ["Indent Region" indent-region t]
482 ["Fill Region" f90-fill-region t]
484 ["Break Line at Point" f90-break-line t]
485 ["Join with Next Line" f90-join-lines t]
486 ["Insert Newline" newline t]
487 ["Insert Block End" f90-insert-end t]
489 ["Upcase Keywords (buffer)" f90-upcase-keywords t]
490 ["Upcase Keywords (region)" f90-upcase-region-keywords t]
491 ["Capitalize Keywords (buffer)" f90-capitalize-keywords t]
492 ["Capitalize Keywords (region)" f90-capitalize-region-keywords t]
493 ["Downcase Keywords (buffer)" f90-downcase-keywords t]
494 ["Downcase Keywords (region)" f90-downcase-region-keywords t]
496 ["Toggle abbrev-mode" abbrev-mode t]
497 ["Toggle auto-fill" auto-fill-mode t])
498 "XEmacs menu for F90 mode.")
501 (defvar f90-menu-bar-menu
502 (let ((map (make-sparse-keymap "F90")))
503 (define-key map [f90-imenu-menu]
504 '("Add imenu Menu" . f90-add-imenu-menu))
505 (define-key map [abbrev-mode]
506 '("Toggle abbrev-mode" . abbrev-mode))
507 (define-key map [auto-fill-mode]
508 '("Toggle auto-fill" . auto-fill-mode))
509 (define-key map [line1] '("--"))
510 (define-key map [f90-change-case-menu]
511 '("Change Keyword Case" . f90-change-case-menu))
512 (define-key map [f90-font-lock-menu]
513 '("Highlighting" . f90-font-lock-menu))
514 (define-key map [line2] '("--"))
515 (define-key map [f90-insert-end]
516 '("Insert Block End" . f90-insert-end))
517 (define-key map [f90-join-lines]
518 '("Join with Next Line" . f90-join-lines))
519 (define-key map [f90-break-line]
520 '("Break Line at Point" . f90-break-line))
521 (define-key map [line3] '("--"))
522 (define-key map [f90-fill-region]
523 '("Fill Region" . f90-fill-region))
524 (put 'f90-fill-region 'menu-enable 'mark-active)
525 (define-key map [indent-region]
526 '("Indent Region" . indent-region))
527 (define-key map [f90-comment-region]
528 '("(Un)Comment Region" . f90-comment-region))
529 (put 'f90-comment-region 'menu-enable 'mark-active)
530 (define-key map [line4] '("--"))
531 (define-key map [f90-end-of-subprogram]
532 '("End of Subprogram" . f90-end-of-subprogram))
533 (define-key map [f90-beginning-of-subprogram]
534 '("Beginning of Subprogram" . f90-beginning-of-subprogram))
535 (define-key map [f90-mark-subprogram]
536 '("Mark Subprogram" . f90-mark-subprogram))
537 (define-key map [f90-indent-subprogram]
538 '("Indent Subprogram" . f90-indent-subprogram))
540 "F90 mode top-level menu bar menu.")
542 (define-key f90-mode-map [menu-bar f90-menu]
543 (cons "F90" f90-menu-bar-menu))
545 (defvar f90-change-case-menu
546 (let ((map (make-sparse-keymap "Change Keyword Case")))
547 (define-key map [dkr]
548 '("Downcase Keywords (region)" . f90-downcase-region-keywords))
549 (put 'f90-downcase-region-keywords 'menu-enable 'mark-active)
550 (define-key map [ckr]
551 '("Capitalize Keywords (region)" . f90-capitalize-region-keywords))
552 (put 'f90-capitalize-region-keywords 'menu-enable 'mark-active)
553 (define-key map [ukr]
554 '("Upcase Keywords (region)" . f90-upcase-region-keywords))
555 (put 'f90-upcase-region-keywords 'menu-enable 'mark-active)
556 (define-key map [line] '("--"))
557 (define-key map [dkb]
558 '("Downcase Keywords (buffer)" . f90-downcase-keywords))
559 (define-key map [ckb]
560 '("Capitalize Keywords (buffer)" . f90-capitalize-keywords))
561 (define-key map [ukb]
562 '("Upcase Keywords (buffer)" . f90-upcase-keywords))
564 "Submenu for change of case.")
566 (defalias 'f90-change-case-menu f90-change-case-menu)
568 ;; Font-lock-menu and function calls.
569 (defalias 'f90-font-lock-on 'font-lock-mode)
570 (put 'f90-font-lock-on 'menu-enable 'font-lock-mode)
571 (put 'f90-font-lock-on 'menu-alias t)
573 (defalias 'f90-font-lock-off 'font-lock-mode)
574 (put 'f90-font-lock-off 'menu-enable '(not font-lock-mode))
575 (put 'f90-font-lock-off 'menu-alias t)
577 (defun f90-font-lock-1 ()
578 "Set `font-lock-keywords' to `f90-font-lock-keywords-1'."
581 (setq font-lock-keywords f90-font-lock-keywords-1)
582 (font-lock-fontify-buffer))
584 (defun f90-font-lock-2 ()
585 "Set `font-lock-keywords' to `f90-font-lock-keywords-2'."
588 (setq font-lock-keywords f90-font-lock-keywords-2)
589 (font-lock-fontify-buffer))
591 (defun f90-font-lock-3 ()
592 "Set `font-lock-keywords' to `f90-font-lock-keywords-3'."
595 (setq font-lock-keywords f90-font-lock-keywords-3)
596 (font-lock-fontify-buffer))
598 (defun f90-font-lock-4 ()
599 "Set `font-lock-keywords' to `f90-font-lock-keywords-4'."
602 (setq font-lock-keywords f90-font-lock-keywords-4)
603 (font-lock-fontify-buffer))
605 (defvar f90-font-lock-menu
606 (let ((map (make-sparse-keymap "f90-font-lock-menu")))
608 '("Maximum highlighting (level 4)" . f90-font-lock-4))
610 '("Heavy highlighting (level 3)" . f90-font-lock-3))
612 '("Default highlighting (level 2)" . f90-font-lock-2))
614 '("Light highlighting (level 1)" . f90-font-lock-1))
615 (define-key map [line] '("--"))
616 (define-key map [floff]
617 '("Turn off font-lock-mode" . f90-font-lock-on))
618 (define-key map [flon]
619 '("Turn on font-lock-mode" . f90-font-lock-off))
621 "Submenu for highlighting using font-lock-mode.")
623 (defalias 'f90-font-lock-menu f90-font-lock-menu)
627 ;; Regexps for finding program structures.
628 (defconst f90-blocks-re
629 (concat "\\(block[ \t]*data\\|"
630 (regexp-opt '("do" "if" "interface" "function" "module" "program"
631 "select" "subroutine" "type" "where" "forall"))
633 "Regexp potentially indicating a \"block\" of F90 code.")
635 (defconst f90-program-block-re
636 (regexp-opt '("program" "module" "subroutine" "function") 'paren)
637 "Regexp used to locate the start/end of a \"subprogram\".")
639 (defconst f90-else-like-re
640 "\\(else\\([ \t]*if\\|where\\)?\\|case[ \t]*\\(default\\|(\\)\\)"
641 "Regexp matching an ELSE IF, ELSEWHERE, CASE statement.")
643 (defconst f90-end-if-re
645 (regexp-opt '("if" "select" "where" "forall") 'paren)
647 "Regexp matching the end of an IF, SELECT, WHERE, FORALL block.")
649 (defconst f90-end-type-re
650 "end[ \t]*\\(type\\|interface\\|block[ \t]*data\\)\\>"
651 "Regexp matching the end of a TYPE, INTERFACE, BLOCK DATA section.")
653 (defconst f90-type-def-re
654 "\\<\\(type\\)\\>\\(?:[^()\n]*::\\)?[ \t]*\\(\\sw+\\)"
655 "Regexp matching the definition of a derived type.")
657 (defconst f90-no-break-re
658 (regexp-opt '("**" "//" "=>") 'paren)
659 "Regexp specifying where not to break lines when filling.")
661 (defvar f90-cache-position nil
662 "Temporary position used to speed up region operations.")
663 (make-variable-buffer-local 'f90-cache-position)
665 (defvar f90-imenu-flag nil
666 "Non-nil means this buffer already has an imenu.")
667 (make-variable-buffer-local 'f90-imenu-flag)
671 (defvar f90-imenu-generic-expression
672 (let ((good-char "[^!\"\&\n \t]") (not-e "[^e!\n\"\& \t]")
673 (not-n "[^n!\n\"\& \t]") (not-d "[^d!\n\"\& \t]"))
675 '(nil "^[ \t0-9]*program[ \t]+\\(\\sw+\\)" 1)
676 '("Modules" "^[ \t0-9]*module[ \t]+\\(\\sw+\\)[ \t]*\\(!\\|$\\)" 1)
677 '("Types" "^[ \t0-9]*type[ \t]+\\(\\sw+\\)" 1)
683 ;; At least three non-space characters before function/subroutine.
684 ;; Check that the last three non-space characters do not spell E N D.
686 not-e good-char good-char "\\|"
687 good-char not-n good-char "\\|"
688 good-char good-char not-d "\\)"
690 ;; Less than three non-space characters before function/subroutine.
691 good-char "?" good-char "?"
693 "[ \t]*\\(function\\|subroutine\\)[ \t]+\\(\\sw+\\)")
695 "Generic imenu expression for F90 mode.")
697 (defun f90-add-imenu-menu ()
698 "Add an imenu menu to the menubar."
701 (message "%s" "F90-imenu already exists.")
702 (imenu-add-to-menubar "F90-imenu")
703 (redraw-frame (selected-frame))
704 (setq f90-imenu-flag t)))
706 (put 'f90-add-imenu-menu 'menu-enable '(not f90-imenu-flag))
709 ;; Abbrevs have generally two letters, except standard types `c, `i, `r, `t.
710 (defvar f90-mode-abbrev-table
711 (let (abbrevs-changed)
712 (define-abbrev-table 'f90-mode-abbrev-table nil)
713 ;; Use the 6th arg (SYSTEM-FLAG) of define-abbrev if possible.
714 ;; A little baroque to quieten the byte-compiler.
716 (function (lambda (element)
718 (apply 'define-abbrev f90-mode-abbrev-table
719 (append element '(nil 0 t)))
720 (wrong-number-of-arguments
721 (apply 'define-abbrev f90-mode-abbrev-table
722 (append element '(nil 0)))))))
723 '(("`al" "allocate" )
724 ("`ab" "allocatable" )
725 ("`as" "assignment" )
727 ("`bd" "block data" )
734 ("`de" "deallocate" )
740 ("`elw" "elsewhere" )
741 ("`eq" "equivalence" )
748 ("`im" "implicit none")
770 ("`su" "subroutine" )
776 f90-mode-abbrev-table)
777 "Abbrev table for F90 mode.")
782 "Major mode for editing Fortran 90,95 code in free format.
784 \\[f90-indent-new-line] indents current line and creates a new\
786 \\[f90-indent-line] indents the current line.
787 \\[f90-indent-subprogram] indents the current subprogram.
789 Type `? or `\\[help-command] to display a list of built-in\
790 abbrevs for F90 keywords.
795 Variables controlling indentation style and extra features:
798 Extra indentation within do blocks (default 3).
800 Extra indentation within if/select case/where/forall blocks (default 3).
802 Extra indentation within type/interface/block-data blocks (default 3).
804 Extra indentation within program/module/subroutine/function blocks
806 `f90-continuation-indent'
807 Extra indentation applied to continuation lines (default 5).
809 String inserted by function \\[f90-comment-region] at start of each
810 line in region (default \"!!!$\").
811 `f90-indented-comment-re'
812 Regexp determining the type of comment to be intended like code
814 `f90-directive-comment-re'
815 Regexp of comment-like directive like \"!HPF\\\\$\", not to be indented
816 (default \"!hpf\\\\$\").
817 `f90-break-delimiters'
818 Regexp holding list of delimiters at which lines may be broken
819 (default \"[-+*/><=,% \\t]\").
820 `f90-break-before-delimiters'
821 Non-nil causes `f90-do-auto-fill' to break lines before delimiters
823 `f90-beginning-ampersand'
824 Automatic insertion of \& at beginning of continuation lines (default t).
826 From an END statement, check and fill the end using matching block start.
827 Allowed values are 'blink, 'no-blink, and nil, which determine
828 whether to blink the matching beginning (default 'blink).
829 `f90-auto-keyword-case'
830 Automatic change of case of keywords (default nil).
831 The possibilities are 'downcase-word, 'upcase-word, 'capitalize-word.
833 Do not left-justify line numbers (default nil).
835 List of keywords used for highlighting/upcase-keywords etc.
837 Turning on F90 mode calls the value of the variable `f90-mode-hook'
838 with no args, if that value is non-nil."
840 (kill-all-local-variables)
841 (setq major-mode 'f90-mode
843 local-abbrev-table f90-mode-abbrev-table)
844 (set-syntax-table f90-mode-syntax-table)
845 (use-local-map f90-mode-map)
846 (set (make-local-variable 'indent-line-function) 'f90-indent-line)
847 (set (make-local-variable 'indent-region-function) 'f90-indent-region)
848 (set (make-local-variable 'require-final-newline) t)
849 (set (make-local-variable 'comment-start) "!")
850 (set (make-local-variable 'comment-start-skip) "!+ *")
851 (set (make-local-variable 'comment-indent-function) 'f90-comment-indent)
852 (set (make-local-variable 'abbrev-all-caps) t)
853 (set (make-local-variable 'normal-auto-fill-function) 'f90-do-auto-fill)
854 (setq indent-tabs-mode nil) ; auto buffer local
855 ;; Setting up things for font-lock.
856 (when f90-xemacs-flag
857 (put 'f90-mode 'font-lock-keywords-case-fold-search t)
858 (when (and (featurep 'menubar)
860 (not (assoc "F90" current-menubar)))
861 (set-buffer-menubar (copy-sequence current-menubar))
862 (add-submenu nil f90-xemacs-menu)))
863 ;; XEmacs: Does not need a special case, since both emacsen work alike -sb.
864 (set (make-local-variable 'font-lock-defaults)
865 '((f90-font-lock-keywords f90-font-lock-keywords-1
866 f90-font-lock-keywords-2
867 f90-font-lock-keywords-3
868 f90-font-lock-keywords-4)
870 ;; Tell imenu how to handle f90.
871 (set (make-local-variable 'imenu-case-fold-search) t)
872 (set (make-local-variable 'imenu-generic-expression)
873 f90-imenu-generic-expression)
874 (set (make-local-variable 'add-log-current-defun-function)
876 (run-hooks 'f90-mode-hook))
880 (defsubst f90-in-string ()
881 "Return non-nil if point is inside a string.
882 Checks from `point-min', or `f90-cache-position', if that is non-nil
883 and lies before point."
885 (if (and f90-cache-position (> (point) f90-cache-position))
888 (nth 3 (parse-partial-sexp beg-pnt (point)))))
890 (defsubst f90-in-comment ()
891 "Return non-nil if point is inside a comment.
892 Checks from `point-min', or `f90-cache-position', if that is non-nil
893 and lies before point."
895 (if (and f90-cache-position (> (point) f90-cache-position))
898 (nth 4 (parse-partial-sexp beg-pnt (point)))))
900 (defsubst f90-line-continued ()
901 "Return t if the current line is a continued one.
902 This includes comment lines embedded in continued lines, but
903 not the last line of a continued statement."
906 (while (and (looking-at "[ \t]*\\(!\\|$\\)") (zerop (forward-line -1))))
908 (while (f90-in-comment)
909 (search-backward "!" (line-beginning-position))
910 (skip-chars-backward "!"))
911 (skip-chars-backward " \t")
912 (= (preceding-char) ?&)))
914 (defsubst f90-current-indentation ()
915 "Return indentation of current line.
916 Line-numbers are considered whitespace characters."
917 (save-excursion (beginning-of-line) (skip-chars-forward " \t0-9")))
919 (defsubst f90-indent-to (col &optional no-line-number)
920 "Indent current line to column COL.
921 If optional argument NO-LINE-NUMBER is nil, jump over a possible
922 line-number before indenting."
924 (if (not no-line-number)
925 (skip-chars-forward " \t0-9"))
926 (delete-horizontal-space)
927 (if (zerop (current-column))
929 (indent-to col 1))) ; leave >= 1 space after line number
931 (defsubst f90-get-present-comment-type ()
932 "If point lies within a comment, return the string starting the comment.
933 For example, \"!\" or \"!!\"."
935 (when (f90-in-comment)
937 (re-search-forward "!+" (line-end-position))
938 (while (f90-in-string)
939 (re-search-forward "!+" (line-end-position)))
942 (defsubst f90-equal-symbols (a b)
943 "Compare strings A and B neglecting case and allowing for nil value."
944 (equal (if a (downcase a) nil)
945 (if b (downcase b) nil)))
947 ;; XEmacs 19.11 & 19.12 return a single char when matching an empty regexp.
948 ;; The next 2 functions are therefore longer than necessary.
949 (defsubst f90-looking-at-do ()
950 "Return (\"do\" NAME) if a do statement starts after point.
951 NAME is nil if the statement has no label."
952 (if (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\\(do\\)\\>")
953 (list (match-string 3)
954 (if (looking-at "\\(\\sw+\\)[ \t]*:") (match-string 1)))))
956 (defsubst f90-looking-at-select-case ()
957 "Return (\"select\" NAME) if a select-case statement starts after point.
958 NAME is nil if the statement has no label."
959 (if (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\
960 \\(select\\)[ \t]*case[ \t]*(")
961 (list (match-string 3)
962 (if (looking-at "\\(\\sw+\\)[ \t]*:") (match-string 1)))))
964 (defsubst f90-looking-at-if-then ()
965 "Return (\"if\" NAME) if an if () then statement starts after point.
966 NAME is nil if the statement has no label."
968 (when (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\\(if\\)\\>")
969 (let ((struct (match-string 3))
970 (label (if (looking-at "\\(\\sw+\\)[ \t]*:") (match-string 1)))
971 (pos (scan-lists (point) 1 0)))
972 (and pos (goto-char pos))
973 (skip-chars-forward " \t")
974 (if (or (looking-at "then\\>")
975 (when (f90-line-continued)
977 (skip-chars-forward " \t0-9&")
978 (looking-at "then\\>")))
979 (list struct label))))))
981 (defsubst f90-looking-at-where-or-forall ()
982 "Return (KIND NAME) if a where or forall block starts after point.
983 NAME is nil if the statement has no label."
985 (when (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\
986 \\(where\\|forall\\)\\>")
987 (let ((struct (match-string 3))
988 (label (if (looking-at "\\(\\sw+\\)[ \t]*:") (match-string 1)))
989 (pos (scan-lists (point) 1 0)))
990 (and pos (goto-char pos))
991 (skip-chars-forward " \t")
992 (if (looking-at "\\(!\\|$\\)") (list struct label))))))
994 (defsubst f90-looking-at-type-like ()
995 "Return (KIND NAME) if a type/interface/block-data block starts after point.
996 NAME is non-nil only for type."
998 ((looking-at f90-type-def-re)
999 (list (match-string 1) (match-string 2)))
1000 ((looking-at "\\(interface\\|block[\t]*data\\)\\>")
1001 (list (match-string 1) nil))))
1003 (defsubst f90-looking-at-program-block-start ()
1004 "Return (KIND NAME) if a program block with name NAME starts after point."
1006 ((looking-at "\\(program\\)[ \t]+\\(\\sw+\\)\\>")
1007 (list (match-string 1) (match-string 2)))
1008 ((and (not (looking-at "module[ \t]*procedure\\>"))
1009 (looking-at "\\(module\\)[ \t]+\\(\\sw+\\)\\>"))
1010 (list (match-string 1) (match-string 2)))
1011 ((and (not (looking-at "end[ \t]*\\(function\\|subroutine\\)"))
1012 (looking-at "[^!'\"\&\n]*\\(function\\|subroutine\\)\
1013 [ \t]+\\(\\sw+\\)"))
1014 (list (match-string 1) (match-string 2)))))
1016 (defsubst f90-looking-at-program-block-end ()
1017 "Return (KIND NAME) if a block with name NAME ends after point."
1018 (if (looking-at (concat "end[ \t]*" f90-blocks-re
1019 "?\\([ \t]+\\(\\sw+\\)\\)?\\>"))
1020 (list (match-string 1) (match-string 3))))
1022 (defsubst f90-comment-indent ()
1023 "Return the indentation to be used for a comment starting at point.
1024 Used for `comment-indent-function' by F90 mode.
1025 \"!!!\", `f90-directive-comment-re', variable `f90-comment-region' return 0.
1026 `f90-indented-comment-re' (if not trailing code) calls `f90-calculate-indent'.
1027 All others return `comment-column', leaving at least one space after code."
1028 (cond ((looking-at "!!!") 0)
1029 ((and f90-directive-comment-re
1030 (looking-at f90-directive-comment-re)) 0)
1031 ((looking-at (regexp-quote f90-comment-region)) 0)
1032 ((and (looking-at f90-indented-comment-re)
1033 ;; Don't attempt to indent trailing comment as code.
1035 (skip-chars-backward " \t")
1037 (f90-calculate-indent))
1038 (t (skip-chars-backward " \t")
1039 (max (if (bolp) 0 (1+ (current-column))) comment-column))))
1041 (defsubst f90-present-statement-cont ()
1042 "Return continuation properties of present statement.
1043 Possible return values are:
1044 single - statement is not continued.
1045 begin - current line is the first in a continued statement.
1046 end - current line is the last in a continued statement
1047 middle - current line is neither first nor last in a continued statement.
1048 Comment lines embedded amongst continued lines return 'middle."
1051 (setq pcont (if (f90-previous-statement) (f90-line-continued))))
1052 (setq cont (f90-line-continued))
1053 (cond ((and (not pcont) (not cont)) 'single)
1054 ((and (not pcont) cont) 'begin)
1055 ((and pcont (not cont)) 'end)
1056 ((and pcont cont) 'middle)
1057 (t (error "The impossible occurred")))))
1059 (defsubst f90-indent-line-no ()
1060 "If `f90-leave-line-no' is nil, left-justify a line number.
1061 Leaves point at the first non-blank character after the line number.
1062 Call from beginning of line."
1063 (if (and (null f90-leave-line-no) (looking-at "[ \t]+[0-9]"))
1064 (delete-horizontal-space))
1065 (skip-chars-forward " \t0-9"))
1067 (defsubst f90-no-block-limit ()
1068 "Return nil if point is at the edge of a code block.
1069 Searches line forward for \"function\" or \"subroutine\",
1071 (let ((eol (line-end-position)))
1073 (not (or (looking-at "end")
1074 (looking-at "\\(do\\|if\\|else\\(if\\|where\\)?\
1075 \\|select[ \t]*case\\|case\\|where\\|forall\\)\\>")
1076 (looking-at "\\(program\\|module\\|interface\\|\
1077 block[ \t]*data\\)\\>")
1078 (looking-at "\\(contains\\|\\sw+[ \t]*:\\)")
1079 (looking-at f90-type-def-re)
1080 (re-search-forward "\\(function\\|subroutine\\)" eol t))))))
1082 (defsubst f90-update-line ()
1083 "Change case of current line as per `f90-auto-keyword-case'."
1084 (if f90-auto-keyword-case
1085 (f90-change-keywords f90-auto-keyword-case
1086 (line-beginning-position) (line-end-position))))
1088 (defun f90-electric-insert ()
1089 "Change keyword case and auto-fill line as operators are inserted."
1091 (self-insert-command 1)
1092 (if auto-fill-function (f90-do-auto-fill) ; also updates line
1096 (defun f90-get-correct-indent ()
1097 "Get correct indent for a line starting with line number.
1098 Does not check type and subprogram indentation."
1099 (let ((epnt (line-end-position)) icol cont)
1101 (while (and (f90-previous-statement)
1103 (setq cont (f90-present-statement-cont))
1104 (or (eq cont 'end) (eq cont 'middle)))
1105 (looking-at "[ \t]*[0-9]"))))
1106 (setq icol (current-indentation))
1108 (when (re-search-forward "\\(if\\|do\\|select\\|where\\|forall\\)"
1109 (line-end-position) t)
1111 (skip-chars-forward " \t")
1112 (cond ((f90-looking-at-do)
1113 (setq icol (+ icol f90-do-indent)))
1114 ((or (f90-looking-at-if-then)
1115 (f90-looking-at-where-or-forall)
1116 (f90-looking-at-select-case))
1117 (setq icol (+ icol f90-if-indent))))
1119 (while (re-search-forward
1120 "\\(if\\|do\\|select\\|where\\|forall\\)" epnt t)
1122 (skip-chars-forward " \t0-9")
1123 (cond ((f90-looking-at-do)
1124 (setq icol (+ icol f90-do-indent)))
1125 ((or (f90-looking-at-if-then)
1126 (f90-looking-at-where-or-forall)
1127 (f90-looking-at-select-case))
1128 (setq icol (+ icol f90-if-indent)))
1129 ((looking-at f90-end-if-re)
1130 (setq icol (- icol f90-if-indent)))
1131 ((looking-at "end[ \t]*do\\>")
1132 (setq icol (- icol f90-do-indent))))
1136 (defun f90-calculate-indent ()
1137 "Calculate the indent column based on previous statements."
1139 (let (icol cont (case-fold-search t) (pnt (point)))
1141 (if (not (f90-previous-statement))
1143 (setq cont (f90-present-statement-cont))
1145 (while (not (eq 'begin (f90-present-statement-cont)))
1146 (f90-previous-statement)))
1147 (cond ((eq cont 'begin)
1148 (setq icol (+ (f90-current-indentation)
1149 f90-continuation-indent)))
1150 ((eq cont 'middle) (setq icol (current-indentation)))
1151 (t (setq icol (f90-current-indentation))
1152 (skip-chars-forward " \t")
1153 (if (looking-at "[0-9]")
1154 (setq icol (f90-get-correct-indent))
1155 (cond ((or (f90-looking-at-if-then)
1156 (f90-looking-at-where-or-forall)
1157 (f90-looking-at-select-case)
1158 (looking-at f90-else-like-re))
1159 (setq icol (+ icol f90-if-indent)))
1160 ((f90-looking-at-do)
1161 (setq icol (+ icol f90-do-indent)))
1162 ((f90-looking-at-type-like)
1163 (setq icol (+ icol f90-type-indent)))
1164 ((or (f90-looking-at-program-block-start)
1165 (looking-at "contains[ \t]*\\($\\|!\\)"))
1166 (setq icol (+ icol f90-program-indent)))))
1169 (cond ((looking-at "[ \t]*$"))
1170 ((looking-at "[ \t]*#") ; check for cpp directive
1173 (skip-chars-forward " \t0-9")
1174 (cond ((or (looking-at f90-else-like-re)
1175 (looking-at f90-end-if-re))
1176 (setq icol (- icol f90-if-indent)))
1177 ((looking-at "end[ \t]*do\\>")
1178 (setq icol (- icol f90-do-indent)))
1179 ((looking-at f90-end-type-re)
1180 (setq icol (- icol f90-type-indent)))
1181 ((or (looking-at "contains[ \t]*\\(!\\|$\\)")
1182 (f90-looking-at-program-block-end))
1183 (setq icol (- icol f90-program-indent))))))
1187 (defun f90-previous-statement ()
1188 "Move point to beginning of the previous F90 statement.
1189 Return nil if no previous statement is found.
1190 A statement is a line which is neither blank nor a comment."
1192 (let (not-first-statement)
1194 (while (and (setq not-first-statement (zerop (forward-line -1)))
1195 (looking-at "[ \t0-9]*\\(!\\|$\\|#\\)")))
1196 not-first-statement))
1198 (defun f90-next-statement ()
1199 "Move point to beginning of the next F90 statement.
1200 Return nil if no later statement is found."
1202 (let (not-last-statement)
1204 (while (and (setq not-last-statement
1205 (and (zerop (forward-line 1))
1207 (looking-at "[ \t0-9]*\\(!\\|$\\)")))
1208 not-last-statement))
1210 (defun f90-beginning-of-subprogram ()
1211 "Move point to the beginning of the current subprogram.
1212 Return (TYPE NAME), or nil if not found."
1214 (let ((count 1) (case-fold-search t) matching-beg)
1216 (while (and (> count 0)
1217 (re-search-backward f90-program-block-re nil 'move))
1219 (skip-chars-forward " \t0-9")
1220 (cond ((setq matching-beg (f90-looking-at-program-block-start))
1221 (setq count (1- count)))
1222 ((f90-looking-at-program-block-end)
1223 (setq count (1+ count)))))
1227 (message "No beginning found.")
1230 (defun f90-end-of-subprogram ()
1231 "Move point to the end of the current subprogram.
1232 Return (TYPE NAME), or nil if not found."
1234 (let ((count 1) (case-fold-search t) matching-end)
1236 (while (and (> count 0)
1237 (re-search-forward f90-program-block-re nil 'move))
1239 (skip-chars-forward " \t0-9")
1240 (cond ((f90-looking-at-program-block-start)
1241 (setq count (1+ count)))
1242 ((setq matching-end (f90-looking-at-program-block-end))
1243 (setq count (1- count))))
1245 ;; This means f90-end-of-subprogram followed by f90-start-of-subprogram
1246 ;; has a net non-zero effect, which seems odd.
1247 ;;; (forward-line 1)
1250 (message "No end found.")
1254 (defun f90-end-of-block (&optional num)
1255 "Move point forward to the end of the current code block.
1256 With optional argument NUM, go forward that many balanced blocks.
1257 If NUM is negative, go backward to the start of a block.
1258 Checks for consistency of block types and labels (if present),
1259 and completes outermost block if necessary."
1261 (if (and num (< num 0)) (f90-beginning-of-block (- num)))
1262 (let ((f90-smart-end nil) ; for the final `f90-match-end'
1263 (case-fold-search t)
1265 start-list start-this start-type start-label end-type end-label)
1266 (if (interactive-p) (push-mark (point) t))
1267 (end-of-line) ; probably want this
1268 (while (and (> count 0) (re-search-forward f90-blocks-re nil 'move))
1270 (skip-chars-forward " \t0-9")
1271 (cond ((or (f90-in-string) (f90-in-comment)))
1275 (f90-looking-at-select-case)
1276 (f90-looking-at-type-like)
1277 (f90-looking-at-program-block-start)
1278 (f90-looking-at-if-then)
1279 (f90-looking-at-where-or-forall)))
1280 (setq start-list (cons start-this start-list) ; not add-to-list!
1282 ((looking-at (concat "end[ \t]*" f90-blocks-re
1283 "[ \t]*\\(\\sw+\\)?"))
1284 (setq end-type (match-string 1)
1285 end-label (match-string 2)
1287 ;; Check any internal blocks.
1289 (setq start-this (car start-list)
1290 start-list (cdr start-list)
1291 start-type (car start-this)
1292 start-label (cadr start-this))
1293 (if (not (f90-equal-symbols start-type end-type))
1294 (error "End type `%s' does not match start type `%s'"
1295 end-type start-type))
1296 (if (not (f90-equal-symbols start-label end-label))
1297 (error "End label `%s' does not match start label `%s'"
1298 end-label start-label)))))
1300 (if (> count 0) (error "Missing block end"))
1301 ;; Check outermost block.
1305 (skip-chars-forward " \t0-9")
1308 (defun f90-beginning-of-block (&optional num)
1309 "Move point backwards to the start of the current code block.
1310 With optional argument NUM, go backward that many balanced blocks.
1311 If NUM is negative, go forward to the end of a block.
1312 Checks for consistency of block types and labels (if present).
1313 Does not check the outermost block, because it may be incomplete."
1315 (if (and num (< num 0)) (f90-end-of-block (- num)))
1316 (let ((case-fold-search t)
1318 end-list end-this end-type end-label start-this start-type start-label)
1319 (if (interactive-p) (push-mark (point) t))
1320 (beginning-of-line) ; probably want this
1321 (while (and (> count 0) (re-search-backward f90-blocks-re nil 'move))
1323 (skip-chars-forward " \t0-9")
1324 (cond ((or (f90-in-string) (f90-in-comment)))
1325 ((looking-at (concat "end[ \t]*" f90-blocks-re
1326 "[ \t]*\\(\\sw+\\)?"))
1327 (setq end-list (cons (list (match-string 1) (match-string 2))
1333 (f90-looking-at-select-case)
1334 (f90-looking-at-type-like)
1335 (f90-looking-at-program-block-start)
1336 (f90-looking-at-if-then)
1337 (f90-looking-at-where-or-forall)))
1338 (setq start-type (car start-this)
1339 start-label (cadr start-this)
1341 ;; Check any internal blocks.
1343 (setq end-this (car end-list)
1344 end-list (cdr end-list)
1345 end-type (car end-this)
1346 end-label (cadr end-this))
1347 (if (not (f90-equal-symbols start-type end-type))
1348 (error "Start type `%s' does not match end type `%s'"
1349 start-type end-type))
1350 (if (not (f90-equal-symbols start-label end-label))
1351 (error "Start label `%s' does not match end label `%s'"
1352 start-label end-label))))))
1353 (if (> count 0) (error "Missing block start"))))
1355 (defun f90-next-block (&optional num)
1356 "Move point forward to the next end or start of a code block.
1357 With optional argument NUM, go forward that many blocks.
1358 If NUM is negative, go backwards.
1359 A block is a subroutine, if-endif, etc."
1361 (let ((case-fold-search t)
1362 (count (if num (abs num) 1)))
1363 (while (and (> count 0)
1364 (if (> num 0) (re-search-forward f90-blocks-re nil 'move)
1365 (re-search-backward f90-blocks-re nil 'move)))
1367 (skip-chars-forward " \t0-9")
1368 (cond ((or (f90-in-string) (f90-in-comment)))
1370 (looking-at "end[ \t]*")
1372 (f90-looking-at-select-case)
1373 (f90-looking-at-type-like)
1374 (f90-looking-at-program-block-start)
1375 (f90-looking-at-if-then)
1376 (f90-looking-at-where-or-forall))
1377 (setq count (1- count))))
1378 (if (> num 0) (end-of-line)
1379 (beginning-of-line)))))
1382 (defun f90-previous-block (&optional num)
1383 "Move point backward to the previous end or start of a code block.
1384 With optional argument NUM, go backward that many blocks.
1385 If NUM is negative, go forwards.
1386 A block is a subroutine, if-endif, etc."
1388 (f90-next-block (- (or num 1))))
1391 (defun f90-mark-subprogram ()
1392 "Put mark at end of F90 subprogram, point at beginning, push marks."
1394 (let ((pos (point)) program)
1395 (f90-end-of-subprogram)
1398 (setq program (f90-beginning-of-subprogram))
1400 (zmacs-activate-region)
1402 deactivate-mark nil))
1405 (defun f90-comment-region (beg-region end-region)
1406 "Comment/uncomment every line in the region.
1407 Insert the variable `f90-comment-region' at the start of every line
1408 in the region, or, if already present, remove it."
1410 (let ((end (make-marker)))
1411 (set-marker end end-region)
1412 (goto-char beg-region)
1414 (if (looking-at (regexp-quote f90-comment-region))
1415 (delete-region (point) (match-end 0))
1416 (insert f90-comment-region))
1417 (while (and (zerop (forward-line 1))
1418 (< (point) (marker-position end)))
1419 (if (looking-at (regexp-quote f90-comment-region))
1420 (delete-region (point) (match-end 0))
1421 (insert f90-comment-region)))
1422 (set-marker end nil)))
1424 (defun f90-indent-line (&optional no-update)
1425 "Indent current line as F90 code.
1426 Unless optional argument NO-UPDATE is non-nil, call `f90-update-line'
1429 (let (indent no-line-number (pos (make-marker)) (case-fold-search t))
1430 (set-marker pos (point))
1431 (beginning-of-line) ; digits after & \n are not line-nos
1432 (if (save-excursion (and (f90-previous-statement) (f90-line-continued)))
1433 (progn (setq no-line-number t) (skip-chars-forward " \t"))
1434 (f90-indent-line-no))
1435 (if (looking-at "!")
1436 (setq indent (f90-comment-indent))
1437 (if (and (looking-at "end") f90-smart-end)
1439 (setq indent (f90-calculate-indent)))
1440 (if (not (zerop (- indent (current-column))))
1441 (f90-indent-to indent no-line-number))
1442 ;; If initial point was within line's indentation,
1443 ;; position after the indentation. Else stay at same point in text.
1444 (if (< (point) (marker-position pos))
1445 (goto-char (marker-position pos)))
1446 (if auto-fill-function
1447 (f90-do-auto-fill) ; also updates line
1448 (if (not no-update) (f90-update-line)))
1449 (set-marker pos nil)))
1451 (defun f90-indent-new-line ()
1452 "Reindent current line, insert a newline and indent the newline.
1453 An abbrev before point is expanded if the variable `abbrev-mode' is non-nil.
1454 If run in the middle of a line, the line is not broken."
1456 (let (string cont (case-fold-search t))
1457 (if abbrev-mode (expand-abbrev))
1458 (beginning-of-line) ; reindent where likely to be needed
1459 (f90-indent-line-no)
1460 (f90-indent-line 'no-update)
1462 (delete-horizontal-space) ; destroy trailing whitespace
1463 (setq string (f90-in-string)
1464 cont (f90-line-continued))
1465 (if (and string (not cont)) (insert "&"))
1468 (if (or string (and cont f90-beginning-ampersand)) (insert "&"))
1469 (f90-indent-line 'no-update)))
1472 (defun f90-indent-region (beg-region end-region)
1473 "Indent every line in region by forward parsing."
1475 (let ((end-region-mark (make-marker))
1476 (save-point (point-marker))
1477 block-list ind-lev ind-curr ind-b cont
1478 struct beg-struct end-struct)
1479 (set-marker end-region-mark end-region)
1480 (goto-char beg-region)
1481 ;; First find a line which is not a continuation line or comment.
1483 (while (and (looking-at "[ \t]*[0-9]*\\(!\\|#\\|[ \t]*$\\)")
1484 (progn (f90-indent-line 'no-update)
1485 (zerop (forward-line 1)))
1486 (< (point) end-region-mark)))
1487 (setq cont (f90-present-statement-cont))
1488 (while (and (or (eq cont 'middle) (eq cont 'end))
1489 (f90-previous-statement))
1490 (setq cont (f90-present-statement-cont)))
1491 ;; Process present line for beginning of block.
1492 (setq f90-cache-position (point))
1493 (f90-indent-line 'no-update)
1494 (setq ind-lev (f90-current-indentation)
1497 (skip-chars-forward " \t0-9")
1499 ind-b (cond ((setq struct (f90-looking-at-do)) f90-do-indent)
1500 ((or (setq struct (f90-looking-at-if-then))
1501 (setq struct (f90-looking-at-select-case))
1502 (setq struct (f90-looking-at-where-or-forall))
1503 (looking-at f90-else-like-re))
1505 ((setq struct (f90-looking-at-type-like))
1507 ((or(setq struct (f90-looking-at-program-block-start))
1508 (looking-at "contains[ \t]*\\($\\|!\\)"))
1509 f90-program-indent)))
1510 (if ind-b (setq ind-lev (+ ind-lev ind-b)))
1511 (if struct (setq block-list (cons struct block-list)))
1512 (while (and (f90-line-continued) (zerop (forward-line 1))
1513 (< (point) end-region-mark))
1514 (if (looking-at "[ \t]*!")
1515 (f90-indent-to (f90-comment-indent))
1516 (if (not (zerop (- (current-indentation)
1517 (+ ind-curr f90-continuation-indent))))
1518 (f90-indent-to (+ ind-curr f90-continuation-indent) 'no-line-no))))
1519 ;; Process all following lines.
1520 (while (and (zerop (forward-line 1)) (< (point) end-region-mark))
1522 (f90-indent-line-no)
1523 (setq f90-cache-position (point))
1524 (cond ((looking-at "[ \t]*$") (setq ind-curr 0))
1525 ((looking-at "[ \t]*#") (setq ind-curr 0))
1526 ((looking-at "!") (setq ind-curr (f90-comment-indent)))
1527 ((f90-no-block-limit) (setq ind-curr ind-lev))
1528 ((looking-at f90-else-like-re) (setq ind-curr
1529 (- ind-lev f90-if-indent)))
1530 ((looking-at "contains[ \t]*\\($\\|!\\)")
1531 (setq ind-curr (- ind-lev f90-program-indent)))
1533 (cond ((setq struct (f90-looking-at-do)) f90-do-indent)
1534 ((or (setq struct (f90-looking-at-if-then))
1535 (setq struct (f90-looking-at-select-case))
1536 (setq struct (f90-looking-at-where-or-forall)))
1538 ((setq struct (f90-looking-at-type-like))
1540 ((setq struct (f90-looking-at-program-block-start))
1541 f90-program-indent)))
1542 (setq ind-curr ind-lev)
1543 (if ind-b (setq ind-lev (+ ind-lev ind-b)))
1544 (setq block-list (cons struct block-list)))
1545 ((setq end-struct (f90-looking-at-program-block-end))
1546 (setq beg-struct (car block-list)
1547 block-list (cdr block-list))
1550 (f90-block-match (car beg-struct) (car (cdr beg-struct))
1551 (car end-struct) (car (cdr end-struct)))))
1553 (cond ((looking-at f90-end-if-re) f90-if-indent)
1554 ((looking-at "end[ \t]*do\\>") f90-do-indent)
1555 ((looking-at f90-end-type-re) f90-type-indent)
1556 ((f90-looking-at-program-block-end)
1557 f90-program-indent)))
1558 (if ind-b (setq ind-lev (- ind-lev ind-b)))
1559 (setq ind-curr ind-lev))
1560 (t (setq ind-curr ind-lev)))
1561 ;; Do the indentation if necessary.
1562 (if (not (zerop (- ind-curr (current-column))))
1563 (f90-indent-to ind-curr))
1564 (while (and (f90-line-continued) (zerop (forward-line 1))
1565 (< (point) end-region-mark))
1566 (if (looking-at "[ \t]*!")
1567 (f90-indent-to (f90-comment-indent))
1568 (if (not (zerop (- (current-indentation)
1569 (+ ind-curr f90-continuation-indent))))
1571 (+ ind-curr f90-continuation-indent) 'no-line-no)))))
1572 ;; Restore point, etc.
1573 (setq f90-cache-position nil)
1574 (goto-char save-point)
1575 (set-marker end-region-mark nil)
1576 (set-marker save-point nil)
1578 (zmacs-deactivate-region)
1579 (deactivate-mark))))
1581 (defun f90-indent-subprogram ()
1582 "Properly indent the subprogram containing point."
1585 (let ((program (f90-mark-subprogram)))
1588 (message "Indenting %s %s..."
1589 (car program) (car (cdr program)))
1590 (indent-region (point) (mark) nil)
1591 (message "Indenting %s %s...done"
1592 (car program) (car (cdr program))))
1593 (message "Indenting the whole file...")
1594 (indent-region (point) (mark) nil)
1595 (message "Indenting the whole file...done")))))
1597 (defun f90-break-line (&optional no-update)
1598 "Break line at point, insert continuation marker(s) and indent.
1599 Unless in a string or comment, or if the optional argument NO-UPDATE
1600 is non-nil, call `f90-update-line' after inserting the continuation marker."
1602 (cond ((f90-in-string)
1605 (insert "\n" (f90-get-present-comment-type)))
1607 (or no-update (f90-update-line))
1609 (if f90-beginning-ampersand (insert "&"))))
1610 (indent-according-to-mode))
1612 (defun f90-find-breakpoint ()
1613 "From `fill-column', search backward for break-delimiter."
1614 (let ((bol (line-beginning-position)))
1615 (re-search-backward f90-break-delimiters bol)
1616 (if (not f90-break-before-delimiters)
1617 (if (looking-at f90-no-break-re)
1621 (if (not (looking-at f90-no-break-re))
1624 (defun f90-do-auto-fill ()
1625 "Break line if non-white characters beyond `fill-column'.
1626 Update keyword case first."
1628 ;; Break line before or after last delimiter (non-word char) if
1629 ;; position is beyond fill-column.
1630 ;; Will not break **, //, or => (as specified by f90-no-break-re).
1632 ;; Need this for `f90-electric-insert' and other f90- callers.
1633 (unless (and (boundp 'comment-auto-fill-only-comments)
1634 comment-auto-fill-only-comments
1635 (not (f90-in-comment)))
1636 (while (> (current-column) fill-column)
1637 (let ((pos-mark (point-marker)))
1638 (move-to-column fill-column)
1639 (or (f90-in-string) (f90-find-breakpoint))
1641 (goto-char pos-mark)
1642 (set-marker pos-mark nil)))))
1645 (defun f90-join-lines ()
1646 "Join present line with next line, if this line ends with \&."
1648 (let (pos (oldpos (point)))
1650 (skip-chars-backward " \t")
1651 (when (= (preceding-char) ?&)
1655 (skip-chars-forward " \t")
1656 (if (looking-at "\&") (delete-char 1))
1657 (delete-region pos (point))
1658 (unless (f90-in-string)
1659 (delete-horizontal-space)
1661 (if (and auto-fill-function
1662 (> (line-end-position) fill-column))
1665 t))) ; return t if joined something
1667 (defun f90-fill-region (beg-region end-region)
1668 "Fill every line in region by forward parsing. Join lines if possible."
1670 (let ((end-region-mark (make-marker))
1672 f90-smart-end f90-auto-keyword-case auto-fill-function)
1673 (set-marker end-region-mark end-region)
1674 (goto-char beg-region)
1676 ;; Join as much as possible.
1677 (while (f90-join-lines))
1678 ;; Chop the line if necessary.
1679 (while (> (save-excursion (end-of-line) (current-column))
1681 (move-to-column fill-column)
1682 (f90-find-breakpoint)
1683 (f90-break-line 'no-update))
1684 (setq go-on (and (< (point) (marker-position end-region-mark))
1685 (zerop (forward-line 1)))
1686 f90-cache-position (point)))
1687 (setq f90-cache-position nil)
1689 (zmacs-deactivate-region)
1690 (deactivate-mark))))
1692 (defun f90-block-match (beg-block beg-name end-block end-name)
1693 "Match end-struct with beg-struct and complete end-block if possible.
1694 BEG-BLOCK is the type of block as indicated at the start (e.g., do).
1695 BEG-NAME is the block start name (may be nil).
1696 END-BLOCK is the type of block as indicated at the end (may be nil).
1697 END-NAME is the block end name (may be nil).
1698 Leave point at the end of line."
1699 (search-forward "end" (line-end-position))
1701 (if (not (f90-equal-symbols beg-block end-block))
1704 (message "END %s does not match %s." end-block beg-block)
1706 (throw 'no-match nil))
1707 (message "Inserting %s." beg-block)
1708 (insert (concat " " beg-block)))
1709 (search-forward end-block))
1710 (if (not (f90-equal-symbols beg-name end-name))
1711 (cond ((and beg-name (not end-name))
1712 (message "Inserting %s." beg-name)
1713 (insert (concat " " beg-name)))
1714 ((and beg-name end-name)
1715 (message "Replacing %s with %s." end-name beg-name)
1716 (search-forward end-name)
1717 (replace-match beg-name))
1718 ((and (not beg-name) end-name)
1719 (message "Deleting %s." end-name)
1720 (search-forward end-name)
1721 (replace-match "")))
1722 (if end-name (search-forward end-name)))
1723 (if (not (looking-at "[ \t]*!")) (delete-horizontal-space))))
1725 (defun f90-match-end ()
1726 "From an end block statement, find the corresponding block and name."
1728 (let ((count 1) (top-of-window (window-start))
1729 (end-point (point)) (case-fold-search t)
1730 matching-beg beg-name end-name beg-block end-block end-struct)
1731 (when (save-excursion (beginning-of-line) (skip-chars-forward " \t0-9")
1732 (setq end-struct (f90-looking-at-program-block-end)))
1733 (setq end-block (car end-struct)
1734 end-name (car (cdr end-struct)))
1737 (while (and (> count 0) (re-search-backward f90-blocks-re nil t))
1739 (skip-chars-forward " \t0-9")
1740 (cond ((or (f90-in-string) (f90-in-comment)))
1744 (f90-looking-at-if-then)
1745 (f90-looking-at-where-or-forall)
1746 (f90-looking-at-select-case)
1747 (f90-looking-at-type-like)
1748 (f90-looking-at-program-block-start)))
1749 (setq count (1- count)))
1750 ((looking-at (concat "end[ \t]*" f90-blocks-re))
1751 (setq count (1+ count)))))
1753 (message "No matching beginning.")
1755 (if (eq f90-smart-end 'blink)
1756 (if (< (point) top-of-window)
1757 (message "Matches %s: %s"
1760 (line-beginning-position)
1761 (line-end-position)))
1763 (setq beg-block (car matching-beg)
1764 beg-name (car (cdr matching-beg)))
1765 (goto-char end-point)
1767 (f90-block-match beg-block beg-name end-block end-name))))))
1769 (defun f90-insert-end ()
1770 "Insert a complete end statement matching beginning of present block."
1772 (let ((f90-smart-end (or f90-smart-end 'blink)))
1774 (f90-indent-new-line)))
1776 ;; Abbrevs and keywords.
1778 (defun f90-abbrev-start ()
1779 "Typing `\\[help-command] or `? lists all the F90 abbrevs.
1780 Any other key combination is executed normally."
1783 (insert last-command-char)
1785 (setq c (event-to-character (next-command-event)))
1786 (setq c (read-event)))
1787 ;; Insert char if not equal to `?'.
1788 (if (or (eq c ??) (eq c help-char))
1790 (setq unread-command-events (list c)))))
1792 (defun f90-abbrev-help ()
1793 "List the currently defined abbrevs in F90 mode."
1795 (message "Listing abbrev table...")
1796 (display-buffer (f90-prepare-abbrev-list-buffer))
1797 (message "Listing abbrev table...done"))
1799 (defun f90-prepare-abbrev-list-buffer ()
1800 "Create a buffer listing the F90 mode abbreviations."
1802 (set-buffer (get-buffer-create "*Abbrevs*"))
1804 (insert-abbrev-table-description 'f90-mode-abbrev-table t)
1805 (goto-char (point-min))
1806 (set-buffer-modified-p nil)
1807 (edit-abbrevs-mode))
1808 (get-buffer-create "*Abbrevs*"))
1810 (defun f90-upcase-keywords ()
1811 "Upcase all F90 keywords in the buffer."
1813 (f90-change-keywords 'upcase-word))
1815 (defun f90-capitalize-keywords ()
1816 "Capitalize all F90 keywords in the buffer."
1818 (f90-change-keywords 'capitalize-word))
1820 (defun f90-downcase-keywords ()
1821 "Downcase all F90 keywords in the buffer."
1823 (f90-change-keywords 'downcase-word))
1825 (defun f90-upcase-region-keywords (beg end)
1826 "Upcase all F90 keywords in the region."
1828 (f90-change-keywords 'upcase-word beg end))
1830 (defun f90-capitalize-region-keywords (beg end)
1831 "Capitalize all F90 keywords in the region."
1833 (f90-change-keywords 'capitalize-word beg end))
1835 (defun f90-downcase-region-keywords (beg end)
1836 "Downcase all F90 keywords in the region."
1838 (f90-change-keywords 'downcase-word beg end))
1840 ;; Change the keywords according to argument.
1841 (defun f90-change-keywords (change-word &optional beg end)
1842 "Change the case of F90 keywords in the region (if specified) or buffer.
1843 CHANGE-WORD should be one of 'upcase-word, 'downcase-word, 'capitalize-word."
1845 (setq beg (or beg (point-min))
1846 end (or end (point-max)))
1849 f90-keywords-re "\\|" f90-procedures-re "\\|"
1850 f90-hpf-keywords-re "\\|" f90-operators-re "\\)"))
1851 (ref-point (point-min))
1852 (modified (buffer-modified-p))
1853 state saveword back-point)
1856 (while (re-search-forward keyword-re end t)
1858 (setq state (parse-partial-sexp ref-point (point)))
1859 (or (nth 3 state) (nth 4 state)
1860 (save-excursion ; check for cpp directive
1862 (skip-chars-forward " \t0-9")
1864 (setq ref-point (point)
1865 back-point (save-excursion (backward-word 1) (point))
1866 saveword (buffer-substring back-point ref-point))
1867 (funcall change-word -1)
1868 (or (string= saveword (buffer-substring back-point ref-point))
1869 (setq modified t))))
1870 (or modified (set-buffer-modified-p nil))))))
1873 (defun f90-current-defun ()
1874 "Function to use for `add-log-current-defun-function' in F90 mode."
1876 (nth 1 (f90-beginning-of-subprogram))))
1880 ;;; f90.el ends here