1 ;;; f90.el --- Fortran-90 mode (free format)
3 ;; Copyright (C) 1995, 1996, 1997, 2000, 2001, 2002, 2003, 2004, 2005,
4 ;; 2006, 2007 Free Software Foundation, Inc.
6 ;; Author: Torbj\"orn Einarsson <Torbjorn.Einarsson@era.ericsson.se>
7 ;; Maintainer: Glenn Morris <rgm@gnu.org>
8 ;; Keywords: fortran, f90, languages
10 ;; This file is part of GNU Emacs.
12 ;; GNU Emacs is free software; you can redistribute it and/or modify
13 ;; it under the terms of the GNU General Public License as published by
14 ;; the Free Software Foundation; either version 2, or (at your option)
17 ;; GNU Emacs is distributed in the hope that it will be useful,
18 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
19 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 ;; GNU General Public License for more details.
22 ;; You should have received a copy of the GNU General Public License
23 ;; along with GNU Emacs; see the file COPYING. If not, write to the
24 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
25 ;; Boston, MA 02110-1301, USA.
29 ;; Major mode for editing F90 programs in FREE FORMAT.
30 ;; The minor language revision F95 is also supported (with font-locking).
32 ;; Knows about continuation lines, named structured statements, and other
33 ;; features in F90 including HPF (High Performance Fortran) structures.
34 ;; The basic feature provides accurate indentation of F90 programs.
35 ;; In addition, there are many more features like automatic matching of all
36 ;; end statements, an auto-fill function to break long lines, a join-lines
37 ;; function which joins continued lines, etc.
39 ;; To facilitate typing, a fairly complete list of abbreviations is provided.
40 ;; All abbreviations begin with the backquote character "`"
41 ;; (this requires modification of the syntax-table).
42 ;; For example, `i expands to integer (if abbrev-mode is on).
44 ;; There are two separate features for altering the appearance of code:
45 ;; 1) Upcasing or capitalizing of all keywords.
46 ;; 2) Colors/fonts using font-lock-mode.
47 ;; Automatic upcase or downcase of keywords is controlled by the variable
48 ;; f90-auto-keyword-case.
50 ;; The indentations of lines starting with ! is determined by the first of the
51 ;; following matches (values in the left column are the defaults):
53 ;; start-string/regexp indent variable holding start-string/regexp
55 ;; !hpf\\$ (re) 0 f90-directive-comment-re
56 ;; !!$ 0 f90-comment-region
57 ;; ! (re) as code f90-indented-comment-re
58 ;; default comment-column
60 ;; Ex: Here is the result of 3 different settings of f90-indented-comment-re
61 ;; f90-indented-comment-re !-indentation !!-indentation
63 ;; !! comment-column as code
64 ;; ![^!] as code comment-column
65 ;; Trailing comments are indented to comment-column with indent-for-comment.
66 ;; The function f90-comment-region toggles insertion of
67 ;; the variable f90-comment-region in every line of the region.
69 ;; One common convention for free vs. fixed format is that free format files
70 ;; have the ending .f90 or .f95 while fixed format files have the ending .f.
71 ;; Emacs automatically loads Fortran files in the appropriate mode based
72 ;; on extension. You can modify this by adjusting the variable auto-mode-alist.
74 ;; (add-to-list 'auto-mode-alist '("\\.f\\'" . f90-mode))
76 ;; Once you have entered f90-mode, you may get more info by using
77 ;; the command describe-mode (C-h m). For online help use
78 ;; C-h f <Name of function you want described>, or
79 ;; C-h v <Name of variable you want described>.
81 ;; To customize f90-mode for your taste, use, for example:
82 ;; (you don't have to specify values for all the parameters below)
84 ;;(add-hook 'f90-mode-hook
85 ;; ;; These are the default values.
86 ;; '(lambda () (setq f90-do-indent 3
89 ;; f90-program-indent 2
90 ;; f90-continuation-indent 5
91 ;; f90-comment-region "!!$"
92 ;; f90-directive-comment-re "!hpf\\$"
93 ;; f90-indented-comment-re "!"
94 ;; f90-break-delimiters "[-+\\*/><=,% \t]"
95 ;; f90-break-before-delimiters t
96 ;; f90-beginning-ampersand t
97 ;; f90-smart-end 'blink
98 ;; f90-auto-keyword-case nil
99 ;; f90-leave-line-no nil
100 ;; indent-tabs-mode nil
101 ;; f90-font-lock-keywords f90-font-lock-keywords-2
103 ;; ;; These are not default.
104 ;; (abbrev-mode 1) ; turn on abbreviation mode
105 ;; (f90-add-imenu-menu) ; extra menu with functions etc.
106 ;; (if f90-auto-keyword-case ; change case of all keywords on startup
107 ;; (f90-change-keywords f90-auto-keyword-case))
110 ;; in your .emacs file. You can also customize the lists
111 ;; f90-font-lock-keywords, etc.
113 ;; The auto-fill and abbreviation minor modes are accessible from the F90 menu,
114 ;; or by using M-x auto-fill-mode and M-x abbrev-mode, respectively.
117 ;; 1) Line numbers are by default left-justified. If f90-leave-line-no is
118 ;; non-nil, the line numbers are never touched.
119 ;; 2) Multi-; statements like "do i=1,20 ; j=j+i ; end do" are not handled
120 ;; correctly, but I imagine them to be rare.
121 ;; 3) Regexps for hilit19 are no longer supported.
122 ;; 4) For FIXED FORMAT code, use fortran mode.
123 ;; 5) This mode does not work under emacs-18.x.
124 ;; 6) Preprocessor directives, i.e., lines starting with # are left-justified
125 ;; and are untouched by all case-changing commands. There is, at present, no
126 ;; mechanism for treating multi-line directives (continued by \ ).
127 ;; 7) f77 do-loops do 10 i=.. ; ; 10 continue are not correctly indented.
128 ;; You are urged to use f90-do loops (with labels if you wish).
129 ;; 8) The highlighting mode under XEmacs is not as complete as under Emacs.
131 ;; List of user commands
132 ;; f90-previous-statement f90-next-statement
133 ;; f90-beginning-of-subprogram f90-end-of-subprogram f90-mark-subprogram
134 ;; f90-comment-region
135 ;; f90-indent-line f90-indent-new-line
136 ;; f90-indent-region (can be called by calling indent-region)
137 ;; f90-indent-subprogram
138 ;; f90-break-line f90-join-lines
141 ;; f90-upcase-keywords f90-upcase-region-keywords
142 ;; f90-downcase-keywords f90-downcase-region-keywords
143 ;; f90-capitalize-keywords f90-capitalize-region-keywords
144 ;; f90-add-imenu-menu
145 ;; f90-font-lock-1, f90-font-lock-2, f90-font-lock-3, f90-font-lock-4
147 ;; Original author's thanks
148 ;; Thanks to all the people who have tested the mode. Special thanks to Jens
149 ;; Bloch Helmers for encouraging me to write this code, for creative
150 ;; suggestions as well as for the lists of hpf-commands.
151 ;; Also thanks to the authors of the fortran and pascal modes, on which some
152 ;; of this code is built.
157 ;; Support for align.
158 ;; OpenMP, preprocessor highlighting.
160 (defvar comment-auto-fill-only-comments)
161 (defvar font-lock-keywords)
166 "Major mode for editing free format Fortran 90,95 code."
167 :link '(custom-group-link :tag "Font Lock Faces group" font-lock-faces)
170 (defgroup f90-indent nil
171 "Indentation in free format Fortran."
176 (defcustom f90-do-indent 3
177 "*Extra indentation applied to DO blocks."
181 (defcustom f90-if-indent 3
182 "*Extra indentation applied to IF, SELECT CASE, WHERE and FORALL blocks."
186 (defcustom f90-type-indent 3
187 "*Extra indentation applied to TYPE, INTERFACE and BLOCK DATA blocks."
191 (defcustom f90-program-indent 2
192 "*Extra indentation applied to PROGRAM, MODULE, SUBROUTINE, FUNCTION blocks."
196 (defcustom f90-continuation-indent 5
197 "*Extra indentation applied to continuation lines."
201 (defcustom f90-comment-region "!!$"
202 "*String inserted by \\[f90-comment-region] at start of each line in region."
206 (defcustom f90-indented-comment-re "!"
207 "*Regexp matching comments to indent as code."
211 (defcustom f90-directive-comment-re "!hpf\\$"
212 "*Regexp of comment-like directive like \"!HPF\\\\$\", not to be indented."
216 (defcustom f90-beginning-ampersand t
217 "*Non-nil gives automatic insertion of \& at start of continuation line."
221 (defcustom f90-smart-end 'blink
222 "*Qualification of END statements according to the matching block start.
223 For example, the END that closes an IF block is changed to END
224 IF. If the block has a label, this is added as well. Allowed
225 values are 'blink, 'no-blink, and nil. If nil, nothing is done.
226 The other two settings have the same effect, but 'blink
227 additionally blinks the cursor to the start of the block."
228 :type '(choice (const blink) (const no-blink) (const nil))
231 (defcustom f90-break-delimiters "[-+\\*/><=,% \t]"
232 "*Regexp matching delimiter characters at which lines may be broken.
233 There are certain tokens comprised entirely of characters
234 matching this regexp that should not be split, and these are
235 specified by the constant `f90-no-break-re'."
239 (defcustom f90-break-before-delimiters t
240 "*Non-nil causes `f90-do-auto-fill' to break lines before delimiters."
244 (defcustom f90-auto-keyword-case nil
245 "*Automatic case conversion of keywords.
246 The options are 'downcase-word, 'upcase-word, 'capitalize-word and nil."
247 :type '(choice (const downcase-word) (const upcase-word)
248 (const capitalize-word) (const nil))
251 (defcustom f90-leave-line-no nil
252 "*If non-nil, line numbers are not left justified."
256 (defcustom f90-mode-hook nil
257 "Hook run when entering F90 mode."
259 :options '(f90-add-imenu-menu)
262 ;; User options end here.
264 (defconst f90-keywords-re
265 (regexp-opt '("allocatable" "allocate" "assign" "assignment" "backspace"
266 "block" "call" "case" "character" "close" "common" "complex"
267 "contains" "continue" "cycle" "data" "deallocate"
268 "dimension" "do" "double" "else" "elseif" "elsewhere" "end"
269 "enddo" "endfile" "endif" "entry" "equivalence" "exit"
270 "external" "forall" "format" "function" "goto" "if"
271 "implicit" "include" "inquire" "integer" "intent"
272 "interface" "intrinsic" "logical" "module" "namelist" "none"
273 "nullify" "only" "open" "operator" "optional" "parameter"
274 "pause" "pointer" "precision" "print" "private" "procedure"
275 "program" "public" "read" "real" "recursive" "result" "return"
276 "rewind" "save" "select" "sequence" "stop" "subroutine"
277 "target" "then" "type" "use" "where" "while" "write"
279 "elemental" "pure") 'words)
280 "Regexp used by the function `f90-change-keywords'.")
282 (defconst f90-keywords-level-3-re
284 '("allocatable" "allocate" "assign" "assignment" "backspace"
285 "close" "deallocate" "dimension" "endfile" "entry" "equivalence"
286 "external" "inquire" "intent" "intrinsic" "nullify" "only" "open"
287 "operator" "optional" "parameter" "pause" "pointer" "print" "private"
288 "public" "read" "recursive" "result" "rewind" "save" "select"
289 "sequence" "target" "write"
291 "elemental" "pure") 'words)
292 "Keyword-regexp for font-lock level >= 3.")
294 (defconst f90-procedures-re
297 '("abs" "achar" "acos" "adjustl" "adjustr" "aimag" "aint"
298 "all" "allocated" "anint" "any" "asin" "associated"
299 "atan" "atan2" "bit_size" "btest" "ceiling" "char" "cmplx"
300 "conjg" "cos" "cosh" "count" "cshift" "date_and_time" "dble"
301 "digits" "dim" "dot_product" "dprod" "eoshift" "epsilon"
302 "exp" "exponent" "floor" "fraction" "huge" "iachar" "iand"
303 "ibclr" "ibits" "ibset" "ichar" "ieor" "index" "int" "ior"
304 "ishft" "ishftc" "kind" "lbound" "len" "len_trim" "lge" "lgt"
305 "lle" "llt" "log" "log10" "logical" "matmul" "max"
306 "maxexponent" "maxloc" "maxval" "merge" "min" "minexponent"
307 "minloc" "minval" "mod" "modulo" "mvbits" "nearest" "nint"
308 "not" "pack" "precision" "present" "product" "radix"
309 ;; Real is taken out here to avoid highlighting declarations.
310 "random_number" "random_seed" "range" ;; "real"
311 "repeat" "reshape" "rrspacing" "scale" "scan"
312 "selected_int_kind" "selected_real_kind" "set_exponent"
313 "shape" "sign" "sin" "sinh" "size" "spacing" "spread" "sqrt"
314 "sum" "system_clock" "tan" "tanh" "tiny" "transfer"
315 "transpose" "trim" "ubound" "unpack" "verify"
316 ;; F95 intrinsic functions.
317 "null" "cpu_time") t)
318 ;; A left parenthesis to avoid highlighting non-procedures.
320 "Regexp whose first part matches F90 intrinsic procedures.")
322 (defconst f90-operators-re
324 (regexp-opt '("and" "eq" "eqv" "false" "ge" "gt" "le" "lt" "ne"
325 "neqv" "not" "or" "true") t)
327 "Regexp matching intrinsic operators.")
329 (defconst f90-hpf-keywords-re
331 ;; Intrinsic procedures.
332 '("all_prefix" "all_scatter" "all_suffix" "any_prefix"
333 "any_scatter" "any_suffix" "copy_prefix" "copy_scatter"
334 "copy_suffix" "count_prefix" "count_scatter" "count_suffix"
335 "grade_down" "grade_up"
336 "hpf_alignment" "hpf_distribution" "hpf_template" "iall" "iall_prefix"
337 "iall_scatter" "iall_suffix" "iany" "iany_prefix" "iany_scatter"
338 "iany_suffix" "ilen" "iparity" "iparity_prefix"
339 "iparity_scatter" "iparity_suffix" "leadz" "maxval_prefix"
340 "maxval_scatter" "maxval_suffix" "minval_prefix" "minval_scatter"
341 "minval_suffix" "number_of_processors" "parity"
342 "parity_prefix" "parity_scatter" "parity_suffix" "popcnt" "poppar"
343 "processors_shape" "product_prefix" "product_scatter"
344 "product_suffix" "sum_prefix" "sum_scatter" "sum_suffix"
346 "align" "distribute" "dynamic" "independent" "inherit" "processors"
347 "realign" "redistribute" "template"
349 "block" "cyclic" "extrinsic" "new" "onto" "pure" "with") 'words)
350 "Regexp for all HPF keywords, procedures and directives.")
352 ;; Highlighting patterns.
354 (defvar f90-font-lock-keywords-1
356 ;; Special highlighting of "module procedure".
357 '("\\<\\(module[ \t]*procedure\\)\\>" (1 font-lock-keyword-face))
358 ;; Highlight definition of derived type.
359 '("\\<\\(\\(?:end[ \t]*\\)?type\\)\\>\\([^()\n]*::\\)?[ \t]*\\(\\sw+\\)"
360 (1 font-lock-keyword-face) (3 font-lock-function-name-face))
361 ;; Other functions and declarations.
362 '("\\<\\(\\(?:end[ \t]*\\)?\\(program\\|module\\|function\\|\
363 subroutine\\)\\|use\\|call\\)\\>[ \t]*\\(\\sw+\\)?"
364 (1 font-lock-keyword-face) (3 font-lock-function-name-face nil t))
365 "\\<\\(\\(end[ \t]*\\)?\\(interface\\|block[ \t]*data\\)\\|contains\\)\\>")
366 "This does fairly subdued highlighting of comments and function calls.")
368 (defvar f90-font-lock-keywords-2
370 f90-font-lock-keywords-1
372 ;; Variable declarations (avoid the real function call).
373 '("^[ \t0-9]*\\(real\\|integer\\|c\\(haracter\\|omplex\\)\\|\
374 logical\\|double[ \t]*precision\\|*type[ \t]*(\\sw+)\\)\
375 \\(.*::\\|[ \t]*(.*)\\)?\\([^&!\n]*\\)"
376 (1 font-lock-type-face t) (4 font-lock-variable-name-face t))
377 ;; do, if, select, where, and forall constructs.
378 '("\\<\\(end[ \t]*\\(do\\|if\\|select\\|forall\\|where\\)\\)\\>\
379 \\([ \t]+\\(\\sw+\\)\\)?"
380 (1 font-lock-keyword-face) (3 font-lock-constant-face nil t))
381 '("^[ \t0-9]*\\(\\(\\sw+\\)[ \t]*:[ \t]*\\)?\\(\\(if\\|\
382 do\\([ \t]*while\\)?\\|select[ \t]*case\\|where\\|forall\\)\\)\\>"
383 (2 font-lock-constant-face nil t) (3 font-lock-keyword-face))
384 ;; Implicit declaration.
385 '("\\<\\(implicit\\)[ \t]*\\(real\\|integer\\|c\\(haracter\\|omplex\\)\
386 \\|logical\\|double[ \t]*precision\\|type[ \t]*(\\sw+)\\|none\\)[ \t]*"
387 (1 font-lock-keyword-face) (2 font-lock-type-face))
388 '("\\<\\(namelist\\|common\\)[ \t]*\/\\(\\sw+\\)?\/"
389 (1 font-lock-keyword-face) (2 font-lock-constant-face nil t))
390 "\\<else\\([ \t]*if\\|where\\)?\\>"
391 '("\\(&\\)[ \t]*\\(!\\|$\\)" (1 font-lock-keyword-face))
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 ;; I think that the f95 standard leaves the behaviour of \
438 ;; unspecified, but that f2k will require it to be non-special.
439 ;; Use `f90-backslash-not-special' to change.
440 (modify-syntax-entry ?\\ "\\" table) ; escape chars
442 "Syntax table used in F90 mode.")
445 (let ((map (make-sparse-keymap)))
446 (define-key map "`" 'f90-abbrev-start)
447 (define-key map "\C-c;" 'f90-comment-region)
448 (define-key map "\C-\M-a" 'f90-beginning-of-subprogram)
449 (define-key map "\C-\M-e" 'f90-end-of-subprogram)
450 (define-key map "\C-\M-h" 'f90-mark-subprogram)
451 (define-key map "\C-\M-n" 'f90-end-of-block)
452 (define-key map "\C-\M-p" 'f90-beginning-of-block)
453 (define-key map "\C-\M-q" 'f90-indent-subprogram)
454 (define-key map "\C-j" 'f90-indent-new-line) ; LFD equals C-j
455 (define-key map "\r" 'newline)
456 (define-key map "\C-c\r" 'f90-break-line)
457 ;;; (define-key map [M-return] 'f90-break-line)
458 (define-key map "\C-c\C-a" 'f90-previous-block)
459 (define-key map "\C-c\C-e" 'f90-next-block)
460 (define-key map "\C-c\C-d" 'f90-join-lines)
461 (define-key map "\C-c\C-f" 'f90-fill-region)
462 (define-key map "\C-c\C-p" 'f90-previous-statement)
463 (define-key map "\C-c\C-n" 'f90-next-statement)
464 (define-key map "\C-c\C-w" 'f90-insert-end)
465 (define-key map "\t" 'f90-indent-line)
466 (define-key map "," 'f90-electric-insert)
467 (define-key map "+" 'f90-electric-insert)
468 (define-key map "-" 'f90-electric-insert)
469 (define-key map "*" 'f90-electric-insert)
470 (define-key map "/" 'f90-electric-insert)
472 (easy-menu-define f90-menu map "Menu for F90 mode."
475 ,(custom-menu-create 'f90)
477 ["Save" Custom-save t]
478 ["Reset to Current" Custom-reset-current t]
479 ["Reset to Saved" Custom-reset-saved t]
480 ["Reset to Standard Settings" Custom-reset-standard t]
483 ["Indent Subprogram" f90-indent-subprogram t]
484 ["Mark Subprogram" f90-mark-subprogram t]
485 ["Beginning of Subprogram" f90-beginning-of-subprogram t]
486 ["End of Subprogram" f90-end-of-subprogram t]
488 ["(Un)Comment Region" f90-comment-region mark-active]
489 ["Indent Region" f90-indent-region mark-active]
490 ["Fill Region" f90-fill-region mark-active]
492 ["Break Line at Point" f90-break-line t]
493 ["Join with Previous Line" f90-join-lines t]
494 ["Insert Block End" f90-insert-end t]
497 ["Toggle font-lock-mode" font-lock-mode :selected font-lock-mode
500 ["Light highlighting (level 1)" f90-font-lock-1 t]
501 ["Moderate highlighting (level 2)" f90-font-lock-2 t]
502 ["Heavy highlighting (level 3)" f90-font-lock-3 t]
503 ["Maximum highlighting (level 4)" f90-font-lock-4 t]
505 ("Change Keyword Case"
506 ["Upcase Keywords (buffer)" f90-upcase-keywords t]
507 ["Capitalize Keywords (buffer)" f90-capitalize-keywords t]
508 ["Downcase Keywords (buffer)" f90-downcase-keywords t]
510 ["Upcase Keywords (region)" f90-upcase-region-keywords
512 ["Capitalize Keywords (region)" f90-capitalize-region-keywords
514 ["Downcase Keywords (region)" f90-downcase-region-keywords
518 ["Toggle auto-fill" auto-fill-mode :selected auto-fill-function
520 ["Toggle abbrev-mode" abbrev-mode :selected abbrev-mode
522 ["Add imenu Menu" f90-add-imenu-menu
523 :active (not (lookup-key (current-local-map) [menu-bar index]))
524 :included (fboundp 'imenu-add-to-menubar)]))
526 "Keymap used in F90 mode.")
529 (defun f90-font-lock-1 ()
530 "Set `font-lock-keywords' to `f90-font-lock-keywords-1'."
533 (setq font-lock-keywords f90-font-lock-keywords-1)
534 (font-lock-fontify-buffer))
536 (defun f90-font-lock-2 ()
537 "Set `font-lock-keywords' to `f90-font-lock-keywords-2'."
540 (setq font-lock-keywords f90-font-lock-keywords-2)
541 (font-lock-fontify-buffer))
543 (defun f90-font-lock-3 ()
544 "Set `font-lock-keywords' to `f90-font-lock-keywords-3'."
547 (setq font-lock-keywords f90-font-lock-keywords-3)
548 (font-lock-fontify-buffer))
550 (defun f90-font-lock-4 ()
551 "Set `font-lock-keywords' to `f90-font-lock-keywords-4'."
554 (setq font-lock-keywords f90-font-lock-keywords-4)
555 (font-lock-fontify-buffer))
558 ;; Regexps for finding program structures.
559 (defconst f90-blocks-re
560 (concat "\\(block[ \t]*data\\|"
561 (regexp-opt '("do" "if" "interface" "function" "module" "program"
562 "select" "subroutine" "type" "where" "forall"))
564 "Regexp potentially indicating a \"block\" of F90 code.")
566 (defconst f90-program-block-re
567 (regexp-opt '("program" "module" "subroutine" "function") 'paren)
568 "Regexp used to locate the start/end of a \"subprogram\".")
570 (defconst f90-else-like-re
571 "\\(else\\([ \t]*if\\|where\\)?\\|case[ \t]*\\(default\\|(\\)\\)"
572 "Regexp matching an ELSE IF, ELSEWHERE, CASE statement.")
574 (defconst f90-end-if-re
576 (regexp-opt '("if" "select" "where" "forall") 'paren)
578 "Regexp matching the end of an IF, SELECT, WHERE, FORALL block.")
580 (defconst f90-end-type-re
581 "end[ \t]*\\(type\\|interface\\|block[ \t]*data\\)\\>"
582 "Regexp matching the end of a TYPE, INTERFACE, BLOCK DATA section.")
584 (defconst f90-type-def-re
585 "\\<\\(type\\)\\>\\(?:[^()\n]*::\\)?[ \t]*\\(\\sw+\\)"
586 "Regexp matching the definition of a derived type.")
588 (defconst f90-no-break-re
589 (regexp-opt '("**" "//" "=>" ">=" "<=" "==" "/=") 'paren)
590 "Regexp specifying where not to break lines when filling.
591 This regexp matches certain tokens comprised entirely of
592 characters matching the regexp `f90-break-delimiters' that should
593 not be split by filling. Each element is assumed to be two
596 (defvar f90-cache-position nil
597 "Temporary position used to speed up region operations.")
598 (make-variable-buffer-local 'f90-cache-position)
602 (defconst f90-end-block-re
603 (concat "^[ \t0-9]*\\<end[ \t]*"
604 (regexp-opt '("do" "if" "forall" "function" "interface"
605 "module" "program" "select" "subroutine"
608 "Regexp matching the end of an F90 \"block\", from the line start.
609 Used in the F90 entry in `hs-special-modes-alist'.")
611 ;; Ignore the fact that FUNCTION, SUBROUTINE, WHERE, FORALL have a
612 ;; following "(". DO, CASE, IF can have labels.
613 (defconst f90-start-block-re
615 "^[ \t0-9]*" ; statement number
617 "\\(\\sw+[ \t]*:[ \t]*\\)?" ; structure label
618 "\\(do\\|select[ \t]*case\\|"
619 ;; See comments in fortran-start-block-re for the problems of IF.
621 ".*\n\\([^if]*\\([^i].\\|.[^f]\\|.\\>\\)\\)\\)\\<then\\|"
622 ;; Distinguish WHERE block from isolated WHERE.
623 "\\(where\\|forall\\)[ \t]*(.*)[ \t]*\\(!\\|$\\)\\)\\)"
625 "program\\|interface\\|module\\|type\\|function\\|subroutine"
628 "Regexp matching the start of an F90 \"block\", from the line start.
629 A simple regexp cannot do this in fully correct fashion, so this
630 tries to strike a compromise between complexity and flexibility.
631 Used in the F90 entry in `hs-special-modes-alist'.")
633 ;; hs-special-modes-alist is autoloaded.
634 (add-to-list 'hs-special-modes-alist
635 `(f90-mode ,f90-start-block-re ,f90-end-block-re
636 "!" f90-end-of-block nil))
640 (defvar f90-imenu-generic-expression
641 (let ((good-char "[^!\"\&\n \t]") (not-e "[^e!\n\"\& \t]")
642 (not-n "[^n!\n\"\& \t]") (not-d "[^d!\n\"\& \t]"))
644 '(nil "^[ \t0-9]*program[ \t]+\\(\\sw+\\)" 1)
645 '("Modules" "^[ \t0-9]*module[ \t]+\\(\\sw+\\)[ \t]*\\(!\\|$\\)" 1)
646 '("Types" "^[ \t0-9]*type[ \t]+\\(\\sw+\\)" 1)
652 ;; At least three non-space characters before function/subroutine.
653 ;; Check that the last three non-space characters do not spell E N D.
655 not-e good-char good-char "\\|"
656 good-char not-n good-char "\\|"
657 good-char good-char not-d "\\)"
659 ;; Less than three non-space characters before function/subroutine.
660 good-char "?" good-char "?"
662 "[ \t]*\\(function\\|subroutine\\)[ \t]+\\(\\sw+\\)")
664 "Value for `imenu-generic-expression' in F90 mode.")
666 (defun f90-add-imenu-menu ()
667 "Add an imenu menu to the menubar."
669 (if (lookup-key (current-local-map) [menu-bar index])
670 (message "%s" "F90-imenu already exists.")
671 (imenu-add-to-menubar "F90-imenu")
672 (redraw-frame (selected-frame))))
675 ;; Abbrevs have generally two letters, except standard types `c, `i, `r, `t.
676 (defvar f90-mode-abbrev-table
678 (define-abbrev-table 'f90-mode-abbrev-table nil)
679 f90-mode-abbrev-table)
680 "Abbrev table for F90 mode.")
682 (let (abbrevs-changed)
683 ;; Use the 6th arg (SYSTEM-FLAG) of define-abbrev if possible.
684 ;; A little baroque to quieten the byte-compiler.
686 (function (lambda (element)
688 (apply 'define-abbrev f90-mode-abbrev-table
689 (append element '(nil 0 t)))
690 (wrong-number-of-arguments
691 (apply 'define-abbrev f90-mode-abbrev-table
692 (append element '(nil 0)))))))
693 '(("`al" "allocate" )
694 ("`ab" "allocatable" )
695 ("`as" "assignment" )
697 ("`bd" "block data" )
704 ("`de" "deallocate" )
707 ("`dp" "double precision")
711 ("`elw" "elsewhere" )
712 ("`eq" "equivalence" )
719 ("`im" "implicit none")
741 ("`su" "subroutine" )
751 "Major mode for editing Fortran 90,95 code in free format.
752 For fixed format code, use `fortran-mode'.
754 \\[f90-indent-line] indents the current line.
755 \\[f90-indent-new-line] indents current line and creates a new\
757 \\[f90-indent-subprogram] indents the current subprogram.
759 Type `? or `\\[help-command] to display a list of built-in\
760 abbrevs for F90 keywords.
765 Variables controlling indentation style and extra features:
768 Extra indentation within do blocks (default 3).
770 Extra indentation within if/select case/where/forall blocks (default 3).
772 Extra indentation within type/interface/block-data blocks (default 3).
774 Extra indentation within program/module/subroutine/function blocks
776 `f90-continuation-indent'
777 Extra indentation applied to continuation lines (default 5).
779 String inserted by function \\[f90-comment-region] at start of each
780 line in region (default \"!!!$\").
781 `f90-indented-comment-re'
782 Regexp determining the type of comment to be intended like code
784 `f90-directive-comment-re'
785 Regexp of comment-like directive like \"!HPF\\\\$\", not to be indented
786 (default \"!hpf\\\\$\").
787 `f90-break-delimiters'
788 Regexp holding list of delimiters at which lines may be broken
789 (default \"[-+*/><=,% \\t]\").
790 `f90-break-before-delimiters'
791 Non-nil causes `f90-do-auto-fill' to break lines before delimiters
793 `f90-beginning-ampersand'
794 Automatic insertion of \& at beginning of continuation lines (default t).
796 From an END statement, check and fill the end using matching block start.
797 Allowed values are 'blink, 'no-blink, and nil, which determine
798 whether to blink the matching beginning (default 'blink).
799 `f90-auto-keyword-case'
800 Automatic change of case of keywords (default nil).
801 The possibilities are 'downcase-word, 'upcase-word, 'capitalize-word.
803 Do not left-justify line numbers (default nil).
805 Turning on F90 mode calls the value of the variable `f90-mode-hook'
806 with no args, if that value is non-nil."
808 (kill-all-local-variables)
809 (setq major-mode 'f90-mode
811 local-abbrev-table f90-mode-abbrev-table)
812 (set-syntax-table f90-mode-syntax-table)
813 (use-local-map f90-mode-map)
814 (set (make-local-variable 'indent-line-function) 'f90-indent-line)
815 (set (make-local-variable 'indent-region-function) 'f90-indent-region)
816 (set (make-local-variable 'require-final-newline) mode-require-final-newline)
817 (set (make-local-variable 'comment-start) "!")
818 (set (make-local-variable 'comment-start-skip) "!+ *")
819 (set (make-local-variable 'comment-indent-function) 'f90-comment-indent)
820 (set (make-local-variable 'abbrev-all-caps) t)
821 (set (make-local-variable 'normal-auto-fill-function) 'f90-do-auto-fill)
822 (setq indent-tabs-mode nil) ; auto buffer local
823 (set (make-local-variable 'font-lock-defaults)
824 '((f90-font-lock-keywords f90-font-lock-keywords-1
825 f90-font-lock-keywords-2
826 f90-font-lock-keywords-3
827 f90-font-lock-keywords-4)
829 (set (make-local-variable 'imenu-case-fold-search) t)
830 (set (make-local-variable 'imenu-generic-expression)
831 f90-imenu-generic-expression)
832 (set (make-local-variable 'beginning-of-defun-function)
833 'f90-beginning-of-subprogram)
834 (set (make-local-variable 'end-of-defun-function) 'f90-end-of-subprogram)
835 (set (make-local-variable 'add-log-current-defun-function)
837 (run-mode-hooks 'f90-mode-hook))
841 (defsubst f90-in-string ()
842 "Return non-nil if point is inside a string.
843 Checks from `point-min', or `f90-cache-position', if that is non-nil
844 and lies before point."
846 (if (and f90-cache-position (> (point) f90-cache-position))
849 (nth 3 (parse-partial-sexp beg-pnt (point)))))
851 (defsubst f90-in-comment ()
852 "Return non-nil if point is inside a comment.
853 Checks from `point-min', or `f90-cache-position', if that is non-nil
854 and lies before point."
856 (if (and f90-cache-position (> (point) f90-cache-position))
859 (nth 4 (parse-partial-sexp beg-pnt (point)))))
861 (defsubst f90-line-continued ()
862 "Return t if the current line is a continued one.
863 This includes comment lines embedded in continued lines, but
864 not the last line of a continued statement."
867 (while (and (looking-at "[ \t]*\\(!\\|$\\)") (zerop (forward-line -1))))
869 (while (f90-in-comment)
870 (search-backward "!" (line-beginning-position))
871 (skip-chars-backward "!"))
872 (skip-chars-backward " \t")
873 (= (preceding-char) ?&)))
875 ;; GM this is not right, eg a continuation line starting with a number.
876 ;; Need f90-code-start-position function.
877 ;; And yet, things seems to work with this...
878 ;; cf f90-indent-line
879 ;; (beginning-of-line) ; digits after & \n are not line-nos
880 ;; (if (not (save-excursion (and (f90-previous-statement)
881 ;; (f90-line-continued))))
882 ;; (f90-indent-line-no)
883 (defsubst f90-current-indentation ()
884 "Return indentation of current line.
885 Line-numbers are considered whitespace characters."
886 (save-excursion (beginning-of-line) (skip-chars-forward " \t0-9")))
888 (defsubst f90-indent-to (col &optional no-line-number)
889 "Indent current line to column COL.
890 If optional argument NO-LINE-NUMBER is nil, jump over a possible
891 line-number before indenting."
894 (skip-chars-forward " \t0-9"))
895 (delete-horizontal-space)
896 ;; Leave >= 1 space after line number.
897 (indent-to col (if (zerop (current-column)) 0 1)))
899 (defsubst f90-get-present-comment-type ()
900 "If point lies within a comment, return the string starting the comment.
901 For example, \"!\" or \"!!\", followed by the appropriate amount of
903 ;; Include the whitespace for consistent auto-filling of comment blocks.
905 (when (f90-in-comment)
907 (re-search-forward "!+[ \t]*" (line-end-position))
908 (while (f90-in-string)
909 (re-search-forward "!+[ \t]*" (line-end-position)))
910 (match-string-no-properties 0))))
912 (defsubst f90-equal-symbols (a b)
913 "Compare strings A and B neglecting case and allowing for nil value."
914 (equal (if a (downcase a) nil)
915 (if b (downcase b) nil)))
917 (defsubst f90-looking-at-do ()
918 "Return (\"do\" NAME) if a do statement starts after point.
919 NAME is nil if the statement has no label."
920 (if (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\\(do\\)\\>")
921 (list (match-string 3) (match-string 2))))
923 (defsubst f90-looking-at-select-case ()
924 "Return (\"select\" NAME) if a select-case statement starts after point.
925 NAME is nil if the statement has no label."
926 (if (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\
927 \\(select\\)[ \t]*case[ \t]*(")
928 (list (match-string 3) (match-string 2))))
930 (defsubst f90-looking-at-if-then ()
931 "Return (\"if\" NAME) if an if () then statement starts after point.
932 NAME is nil if the statement has no label."
934 (when (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\\(if\\)\\>")
935 (let ((struct (match-string 3))
936 (label (match-string 2))
937 (pos (scan-lists (point) 1 0)))
938 (and pos (goto-char pos))
939 (skip-chars-forward " \t")
940 (if (or (looking-at "then\\>")
941 (when (f90-line-continued)
943 (skip-chars-forward " \t0-9&")
944 (looking-at "then\\>")))
945 (list struct label))))))
947 (defsubst f90-looking-at-where-or-forall ()
948 "Return (KIND NAME) if a where or forall block starts after point.
949 NAME is nil if the statement has no label."
951 (when (looking-at "\\(\\(\\sw+\\)[ \t]*:\\)?[ \t]*\
952 \\(where\\|forall\\)\\>")
953 (let ((struct (match-string 3))
954 (label (match-string 2))
955 (pos (scan-lists (point) 1 0)))
956 (and pos (goto-char pos))
957 (skip-chars-forward " \t")
958 (if (looking-at "\\(!\\|$\\)") (list struct label))))))
960 (defsubst f90-looking-at-type-like ()
961 "Return (KIND NAME) if a type/interface/block-data block starts after point.
962 NAME is non-nil only for type."
964 ((looking-at f90-type-def-re)
965 (list (match-string 1) (match-string 2)))
966 ((looking-at "\\(interface\\|block[\t]*data\\)\\>")
967 (list (match-string 1) nil))))
969 (defsubst f90-looking-at-program-block-start ()
970 "Return (KIND NAME) if a program block with name NAME starts after point."
971 ;;;NAME is nil for an un-named main PROGRAM block."
973 ((looking-at "\\(program\\)[ \t]+\\(\\sw+\\)\\>")
974 (list (match-string 1) (match-string 2)))
975 ((and (not (looking-at "module[ \t]*procedure\\>"))
976 (looking-at "\\(module\\)[ \t]+\\(\\sw+\\)\\>"))
977 (list (match-string 1) (match-string 2)))
978 ((and (not (looking-at "end[ \t]*\\(function\\|subroutine\\)"))
979 (looking-at "[^!'\"\&\n]*\\(function\\|subroutine\\)[ \t]+\
981 (list (match-string 1) (match-string 2)))))
982 ;; Following will match an un-named main program block; however
983 ;; one needs to check if there is an actual PROGRAM statement after
984 ;; point (and before any END program). Adding this will require
985 ;; change to eg f90-calculate-indent.
987 ;;; (not (f90-previous-statement)))
988 ;;; '("program" nil))))
990 (defsubst f90-looking-at-program-block-end ()
991 "Return (KIND NAME) if a block with name NAME ends after point."
992 (if (looking-at (concat "end[ \t]*" f90-blocks-re
993 "?\\([ \t]+\\(\\sw+\\)\\)?\\>"))
994 (list (match-string 1) (match-string 3))))
996 (defsubst f90-comment-indent ()
997 "Return the indentation to be used for a comment starting at point.
998 Used for `comment-indent-function' by F90 mode.
999 \"!!!\", `f90-directive-comment-re', variable `f90-comment-region' return 0.
1000 `f90-indented-comment-re' (if not trailing code) calls `f90-calculate-indent'.
1001 All others return `comment-column', leaving at least one space after code."
1002 (cond ((looking-at "!!!") 0)
1003 ((and f90-directive-comment-re
1004 (looking-at f90-directive-comment-re)) 0)
1005 ((looking-at (regexp-quote f90-comment-region)) 0)
1006 ((and (looking-at f90-indented-comment-re)
1007 ;; Don't attempt to indent trailing comment as code.
1009 (skip-chars-backward " \t")
1011 (f90-calculate-indent))
1013 (skip-chars-backward " \t")
1014 (max (if (bolp) 0 (1+ (current-column))) comment-column)))))
1016 (defsubst f90-present-statement-cont ()
1017 "Return continuation properties of present statement.
1018 Possible return values are:
1019 single - statement is not continued.
1020 begin - current line is the first in a continued statement.
1021 end - current line is the last in a continued statement
1022 middle - current line is neither first nor last in a continued statement.
1023 Comment lines embedded amongst continued lines return 'middle."
1026 (setq pcont (if (f90-previous-statement) (f90-line-continued))))
1027 (setq cont (f90-line-continued))
1028 (cond ((and (not pcont) (not cont)) 'single)
1029 ((and (not pcont) cont) 'begin)
1030 ((and pcont (not cont)) 'end)
1031 ((and pcont cont) 'middle)
1032 (t (error "The impossible occurred")))))
1034 (defsubst f90-indent-line-no ()
1035 "If `f90-leave-line-no' is nil, left-justify a line number.
1036 Leaves point at the first non-blank character after the line number.
1037 Call from beginning of line."
1038 (and (null f90-leave-line-no) (looking-at "[ \t]+[0-9]")
1039 (delete-horizontal-space))
1040 (skip-chars-forward " \t0-9"))
1042 (defsubst f90-no-block-limit ()
1043 "Return nil if point is at the edge of a code block.
1044 Searches line forward for \"function\" or \"subroutine\",
1047 (not (or (looking-at "end")
1048 (looking-at "\\(do\\|if\\|else\\(if\\|where\\)?\
1049 \\|select[ \t]*case\\|case\\|where\\|forall\\)\\>")
1050 (looking-at "\\(program\\|module\\|interface\\|\
1051 block[ \t]*data\\)\\>")
1052 (looking-at "\\(contains\\|\\sw+[ \t]*:\\)")
1053 (looking-at f90-type-def-re)
1054 (re-search-forward "\\(function\\|subroutine\\)"
1055 (line-end-position) t)))))
1057 (defsubst f90-update-line ()
1058 "Change case of current line as per `f90-auto-keyword-case'."
1059 (if f90-auto-keyword-case
1060 (f90-change-keywords f90-auto-keyword-case
1061 (line-beginning-position) (line-end-position))))
1063 (defun f90-electric-insert (&optional arg)
1064 "Change keyword case and auto-fill line as operators are inserted."
1066 (self-insert-command arg)
1067 (if auto-fill-function (f90-do-auto-fill) ; also updates line
1071 (defun f90-get-correct-indent ()
1072 "Get correct indent for a line starting with line number.
1073 Does not check type and subprogram indentation."
1074 (let ((epnt (line-end-position)) icol cont)
1076 (while (and (f90-previous-statement)
1078 (setq cont (f90-present-statement-cont))
1079 (or (eq cont 'end) (eq cont 'middle)))
1080 (looking-at "[ \t]*[0-9]"))))
1081 (setq icol (current-indentation))
1083 (when (re-search-forward "\\(if\\|do\\|select\\|where\\|forall\\)"
1084 (line-end-position) t)
1086 (skip-chars-forward " \t")
1087 (cond ((f90-looking-at-do)
1088 (setq icol (+ icol f90-do-indent)))
1089 ((or (f90-looking-at-if-then)
1090 (f90-looking-at-where-or-forall)
1091 (f90-looking-at-select-case))
1092 (setq icol (+ icol f90-if-indent))))
1094 (while (re-search-forward
1095 "\\(if\\|do\\|select\\|where\\|forall\\)" epnt t)
1097 (skip-chars-forward " \t0-9")
1098 (cond ((f90-looking-at-do)
1099 (setq icol (+ icol f90-do-indent)))
1100 ((or (f90-looking-at-if-then)
1101 (f90-looking-at-where-or-forall)
1102 (f90-looking-at-select-case))
1103 (setq icol (+ icol f90-if-indent)))
1104 ((looking-at f90-end-if-re)
1105 (setq icol (- icol f90-if-indent)))
1106 ((looking-at "end[ \t]*do\\>")
1107 (setq icol (- icol f90-do-indent))))
1111 (defun f90-calculate-indent ()
1112 "Calculate the indent column based on previous statements."
1114 (let (icol cont (case-fold-search t) (pnt (point)))
1116 (if (not (f90-previous-statement))
1117 ;; If f90-previous-statement returns nil, we must have been
1118 ;; called from on or before the first line of the first statement.
1119 (setq icol (if (save-excursion
1120 ;; f90-previous-statement has moved us over
1121 ;; comment/blank lines, so we need to get
1122 ;; back to the first code statement.
1123 (when (looking-at "[ \t]*\\([!#]\\|$\\)")
1124 (f90-next-statement))
1125 (skip-chars-forward " \t0-9")
1126 (f90-looking-at-program-block-start))
1128 ;; No explicit PROGRAM start statement.
1129 f90-program-indent))
1130 (setq cont (f90-present-statement-cont))
1132 (while (not (eq 'begin (f90-present-statement-cont)))
1133 (f90-previous-statement)))
1134 (cond ((eq cont 'begin)
1135 (setq icol (+ (f90-current-indentation)
1136 f90-continuation-indent)))
1137 ((eq cont 'middle) (setq icol (current-indentation)))
1138 (t (setq icol (f90-current-indentation))
1139 (skip-chars-forward " \t")
1140 (if (looking-at "[0-9]")
1141 (setq icol (f90-get-correct-indent))
1142 (cond ((or (f90-looking-at-if-then)
1143 (f90-looking-at-where-or-forall)
1144 (f90-looking-at-select-case)
1145 (looking-at f90-else-like-re))
1146 (setq icol (+ icol f90-if-indent)))
1147 ((f90-looking-at-do)
1148 (setq icol (+ icol f90-do-indent)))
1149 ((f90-looking-at-type-like)
1150 (setq icol (+ icol f90-type-indent)))
1151 ((or (f90-looking-at-program-block-start)
1152 (looking-at "contains[ \t]*\\($\\|!\\)"))
1153 (setq icol (+ icol f90-program-indent)))))
1156 (cond ((looking-at "[ \t]*$"))
1157 ((looking-at "[ \t]*#") ; check for cpp directive
1160 (skip-chars-forward " \t0-9")
1161 (cond ((or (looking-at f90-else-like-re)
1162 (looking-at f90-end-if-re))
1163 (setq icol (- icol f90-if-indent)))
1164 ((looking-at "end[ \t]*do\\>")
1165 (setq icol (- icol f90-do-indent)))
1166 ((looking-at f90-end-type-re)
1167 (setq icol (- icol f90-type-indent)))
1168 ((or (looking-at "contains[ \t]*\\(!\\|$\\)")
1169 (f90-looking-at-program-block-end))
1170 (setq icol (- icol f90-program-indent))))))
1174 (defun f90-previous-statement ()
1175 "Move point to beginning of the previous F90 statement.
1176 If no previous statement is found (i.e. if called from the first
1177 statement in the buffer), move to the start of the buffer and
1178 return nil. A statement is a line which is neither blank nor a
1181 (let (not-first-statement)
1183 (while (and (setq not-first-statement (zerop (forward-line -1)))
1184 (looking-at "[ \t0-9]*\\(!\\|$\\|#\\)")))
1185 not-first-statement))
1187 (defun f90-next-statement ()
1188 "Move point to beginning of the next F90 statement.
1189 Return nil if no later statement is found."
1191 (let (not-last-statement)
1193 (while (and (setq not-last-statement
1194 (and (zerop (forward-line 1))
1196 (looking-at "[ \t0-9]*\\(!\\|$\\)")))
1197 not-last-statement))
1199 (defun f90-beginning-of-subprogram ()
1200 "Move point to the beginning of the current subprogram.
1201 Return (TYPE NAME), or nil if not found."
1203 (let ((count 1) (case-fold-search t) matching-beg)
1205 (while (and (> count 0)
1206 (re-search-backward f90-program-block-re nil 'move))
1208 (skip-chars-forward " \t0-9")
1209 (cond ((setq matching-beg (f90-looking-at-program-block-start))
1210 (setq count (1- count)))
1211 ((f90-looking-at-program-block-end)
1212 (setq count (1+ count)))))
1216 ;; Note this includes the case of an un-named main program,
1217 ;; in which case we go to (point-min).
1218 (message "No beginning found.")
1221 (defun f90-end-of-subprogram ()
1222 "Move point to the end of the current subprogram.
1223 Return (TYPE NAME), or nil if not found."
1225 (let ((case-fold-search t)
1229 (while (and (> count 0)
1230 (re-search-forward f90-program-block-re nil 'move))
1232 (skip-chars-forward " \t0-9")
1233 (cond ((f90-looking-at-program-block-start)
1234 (setq count (1+ count)))
1235 ((setq matching-end (f90-looking-at-program-block-end))
1236 (setq count (1- count))))
1238 ;; This means f90-end-of-subprogram followed by f90-start-of-subprogram
1239 ;; has a net non-zero effect, which seems odd.
1240 ;;; (forward-line 1)
1243 (message "No end found.")
1247 (defun f90-end-of-block (&optional num)
1248 "Move point forward to the end of the current code block.
1249 With optional argument NUM, go forward that many balanced blocks.
1250 If NUM is negative, go backward to the start of a block. Checks
1251 for consistency of block types and labels (if present), and
1252 completes outermost block if `f90-smart-end' is non-nil.
1253 Interactively, pushes mark before moving point."
1255 (if (interactive-p) (push-mark (point) t)) ; can move some distance
1256 (and num (< num 0) (f90-beginning-of-block (- num)))
1257 (let ((f90-smart-end (if f90-smart-end 'no-blink)) ; for final match-end
1258 (case-fold-search t)
1260 start-list start-this start-type start-label end-type end-label)
1261 (end-of-line) ; probably want this
1262 (while (and (> count 0) (re-search-forward f90-blocks-re nil 'move))
1264 (skip-chars-forward " \t0-9")
1265 (cond ((or (f90-in-string) (f90-in-comment)))
1269 (f90-looking-at-select-case)
1270 (f90-looking-at-type-like)
1271 (f90-looking-at-program-block-start)
1272 (f90-looking-at-if-then)
1273 (f90-looking-at-where-or-forall)))
1274 (setq start-list (cons start-this start-list) ; not add-to-list!
1276 ((looking-at (concat "end[ \t]*" f90-blocks-re
1277 "[ \t]*\\(\\sw+\\)?"))
1278 (setq end-type (match-string 1)
1279 end-label (match-string 2)
1281 ;; Check any internal blocks.
1283 (setq start-this (car start-list)
1284 start-list (cdr start-list)
1285 start-type (car start-this)
1286 start-label (cadr start-this))
1287 (or (f90-equal-symbols start-type end-type)
1288 (error "End type `%s' does not match start type `%s'"
1289 end-type start-type))
1290 (or (f90-equal-symbols start-label end-label)
1291 (error "End label `%s' does not match start label `%s'"
1292 end-label start-label)))))
1294 (if (> count 0) (error "Missing block end"))
1295 ;; Check outermost block.
1299 (skip-chars-forward " \t0-9")
1302 (defun f90-beginning-of-block (&optional num)
1303 "Move point backwards to the start of the current code block.
1304 With optional argument NUM, go backward that many balanced blocks.
1305 If NUM is negative, go forward to the end of a block.
1306 Checks for consistency of block types and labels (if present).
1307 Does not check the outermost block, because it may be incomplete.
1308 Interactively, pushes mark before moving point."
1310 (if (interactive-p) (push-mark (point) t))
1311 (and num (< num 0) (f90-end-of-block (- num)))
1312 (let ((case-fold-search t)
1314 end-list end-this end-type end-label
1315 start-this start-type start-label)
1316 (beginning-of-line) ; probably want this
1317 (while (and (> count 0) (re-search-backward f90-blocks-re nil 'move))
1319 (skip-chars-forward " \t0-9")
1320 (cond ((or (f90-in-string) (f90-in-comment)))
1321 ((looking-at (concat "end[ \t]*" f90-blocks-re
1322 "[ \t]*\\(\\sw+\\)?"))
1323 (setq end-list (cons (list (match-string 1) (match-string 2))
1329 (f90-looking-at-select-case)
1330 (f90-looking-at-type-like)
1331 (f90-looking-at-program-block-start)
1332 (f90-looking-at-if-then)
1333 (f90-looking-at-where-or-forall)))
1334 (setq start-type (car start-this)
1335 start-label (cadr start-this)
1337 ;; Check any internal blocks.
1339 (setq end-this (car end-list)
1340 end-list (cdr end-list)
1341 end-type (car end-this)
1342 end-label (cadr end-this))
1343 (or (f90-equal-symbols start-type end-type)
1344 (error "Start type `%s' does not match end type `%s'"
1345 start-type end-type))
1346 (or (f90-equal-symbols start-label end-label)
1347 (error "Start label `%s' does not match end label `%s'"
1348 start-label end-label))))))
1349 ;; Includes an un-named main program block.
1350 (if (> count 0) (error "Missing block start"))))
1352 (defun f90-next-block (&optional num)
1353 "Move point forward to the next end or start of a code block.
1354 With optional argument NUM, go forward that many blocks.
1355 If NUM is negative, go backwards.
1356 A block is a subroutine, if-endif, etc."
1358 (let ((case-fold-search t)
1359 (count (if num (abs num) 1)))
1360 (while (and (> count 0)
1361 (if (> num 0) (re-search-forward f90-blocks-re nil 'move)
1362 (re-search-backward f90-blocks-re nil 'move)))
1364 (skip-chars-forward " \t0-9")
1365 (cond ((or (f90-in-string) (f90-in-comment)))
1367 (looking-at "end[ \t]*")
1369 (f90-looking-at-select-case)
1370 (f90-looking-at-type-like)
1371 (f90-looking-at-program-block-start)
1372 (f90-looking-at-if-then)
1373 (f90-looking-at-where-or-forall))
1374 (setq count (1- count))))
1375 (if (> num 0) (end-of-line)
1376 (beginning-of-line)))))
1379 (defun f90-previous-block (&optional num)
1380 "Move point backward to the previous end or start of a code block.
1381 With optional argument NUM, go backward that many blocks.
1382 If NUM is negative, go forwards.
1383 A block is a subroutine, if-endif, etc."
1385 (f90-next-block (- (or num 1))))
1388 (defun f90-mark-subprogram ()
1389 "Put mark at end of F90 subprogram, point at beginning, push mark."
1391 (let ((pos (point)) program)
1392 (f90-end-of-subprogram)
1395 (setq program (f90-beginning-of-subprogram))
1396 (if (fboundp 'zmacs-activate-region)
1397 (zmacs-activate-region)
1399 deactivate-mark nil))
1402 (defun f90-comment-region (beg-region end-region)
1403 "Comment/uncomment every line in the region.
1404 Insert the variable `f90-comment-region' at the start of every line
1405 in the region, or, if already present, remove it."
1407 (let ((end (copy-marker end-region)))
1408 (goto-char beg-region)
1410 (if (looking-at (regexp-quote f90-comment-region))
1411 (delete-region (point) (match-end 0))
1412 (insert f90-comment-region))
1413 (while (and (zerop (forward-line 1))
1415 (if (looking-at (regexp-quote f90-comment-region))
1416 (delete-region (point) (match-end 0))
1417 (insert f90-comment-region)))
1418 (set-marker end nil)))
1420 (defun f90-indent-line (&optional no-update)
1421 "Indent current line as F90 code.
1422 Unless optional argument NO-UPDATE is non-nil, call `f90-update-line'
1425 (let ((case-fold-search t)
1426 (pos (point-marker))
1427 indent no-line-number)
1428 (beginning-of-line) ; digits after & \n are not line-nos
1429 (if (not (save-excursion (and (f90-previous-statement)
1430 (f90-line-continued))))
1431 (f90-indent-line-no)
1432 (setq no-line-number t)
1433 (skip-chars-forward " \t"))
1434 (if (looking-at "!")
1435 (setq indent (f90-comment-indent))
1436 (and f90-smart-end (looking-at "end")
1438 (setq indent (f90-calculate-indent)))
1439 (or (= indent (current-column))
1440 (f90-indent-to indent no-line-number))
1441 ;; If initial point was within line's indentation,
1442 ;; position after the indentation. Else stay at same point in text.
1443 (and (< (point) pos)
1445 (if auto-fill-function
1446 ;; GM NO-UPDATE not honoured, since this calls f90-update-line.
1448 (or no-update (f90-update-line)))
1449 (set-marker pos nil)))
1451 (defun f90-indent-new-line ()
1452 "Re-indent 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 (if abbrev-mode (expand-abbrev))
1457 (beginning-of-line) ; reindent where likely to be needed
1458 (f90-indent-line) ; calls indent-line-no, update-line
1460 (delete-horizontal-space) ; destroy trailing whitespace
1461 (let ((string (f90-in-string))
1462 (cont (f90-line-continued)))
1463 (and string (not cont) (insert "&"))
1465 (if (or string (and cont f90-beginning-ampersand)) (insert "&")))
1466 (f90-indent-line 'no-update)) ; nothing to update
1469 ;; TODO not add spaces to empty lines at the start.
1470 ;; Why is second line getting extra indent over first?
1471 (defun f90-indent-region (beg-region end-region)
1472 "Indent every line in region by forward parsing."
1474 (let ((end-region-mark (copy-marker end-region))
1475 (save-point (point-marker))
1476 (case-fold-search t)
1477 block-list ind-lev ind-curr ind-b cont struct beg-struct end-struct)
1478 (goto-char beg-region)
1479 ;; First find a line which is not a continuation line or comment.
1481 (while (and (looking-at "[ \t]*[0-9]*\\(!\\|#\\|[ \t]*$\\)")
1482 (progn (f90-indent-line 'no-update)
1483 (zerop (forward-line 1)))
1484 (< (point) end-region-mark)))
1485 (setq cont (f90-present-statement-cont))
1486 (while (and (or (eq cont 'middle) (eq cont 'end))
1487 (f90-previous-statement))
1488 (setq cont (f90-present-statement-cont)))
1489 ;; Process present line for beginning of block.
1490 (setq f90-cache-position (point))
1491 (f90-indent-line 'no-update)
1492 (setq ind-lev (f90-current-indentation)
1495 (skip-chars-forward " \t0-9")
1497 ind-b (cond ((setq struct (f90-looking-at-do)) f90-do-indent)
1498 ((or (setq struct (f90-looking-at-if-then))
1499 (setq struct (f90-looking-at-select-case))
1500 (setq struct (f90-looking-at-where-or-forall))
1501 (looking-at f90-else-like-re))
1503 ((setq struct (f90-looking-at-type-like))
1505 ((or (setq struct (f90-looking-at-program-block-start))
1506 (looking-at "contains[ \t]*\\($\\|!\\)"))
1507 f90-program-indent)))
1508 (if ind-b (setq ind-lev (+ ind-lev ind-b)))
1509 (if struct (setq block-list (cons struct block-list)))
1510 (while (and (f90-line-continued) (zerop (forward-line 1))
1511 (< (point) end-region-mark))
1512 (if (looking-at "[ \t]*!")
1513 (f90-indent-to (f90-comment-indent))
1514 (or (= (current-indentation)
1515 (+ ind-curr f90-continuation-indent))
1516 (f90-indent-to (+ ind-curr f90-continuation-indent) 'no-line-no))))
1517 ;; Process all following lines.
1518 (while (and (zerop (forward-line 1)) (< (point) end-region-mark))
1520 (f90-indent-line-no)
1521 (setq f90-cache-position (point))
1522 (cond ((looking-at "[ \t]*$") (setq ind-curr 0))
1523 ((looking-at "[ \t]*#") (setq ind-curr 0))
1524 ((looking-at "!") (setq ind-curr (f90-comment-indent)))
1525 ((f90-no-block-limit) (setq ind-curr ind-lev))
1526 ((looking-at f90-else-like-re) (setq ind-curr
1527 (- ind-lev f90-if-indent)))
1528 ((looking-at "contains[ \t]*\\($\\|!\\)")
1529 (setq ind-curr (- ind-lev f90-program-indent)))
1531 (cond ((setq struct (f90-looking-at-do)) f90-do-indent)
1532 ((or (setq struct (f90-looking-at-if-then))
1533 (setq struct (f90-looking-at-select-case))
1534 (setq struct (f90-looking-at-where-or-forall)))
1536 ((setq struct (f90-looking-at-type-like))
1538 ((setq struct (f90-looking-at-program-block-start))
1539 f90-program-indent)))
1540 (setq ind-curr ind-lev)
1541 (if ind-b (setq ind-lev (+ ind-lev ind-b)))
1542 (setq block-list (cons struct block-list)))
1543 ((setq end-struct (f90-looking-at-program-block-end))
1544 (setq beg-struct (car block-list)
1545 block-list (cdr block-list))
1548 (f90-block-match (car beg-struct) (car (cdr beg-struct))
1549 (car end-struct) (car (cdr end-struct)))))
1551 (cond ((looking-at f90-end-if-re) f90-if-indent)
1552 ((looking-at "end[ \t]*do\\>") f90-do-indent)
1553 ((looking-at f90-end-type-re) f90-type-indent)
1554 ((f90-looking-at-program-block-end)
1555 f90-program-indent)))
1556 (if ind-b (setq ind-lev (- ind-lev ind-b)))
1557 (setq ind-curr ind-lev))
1558 (t (setq ind-curr ind-lev)))
1559 ;; Do the indentation if necessary.
1560 (or (= ind-curr (current-column))
1561 (f90-indent-to ind-curr))
1562 (while (and (f90-line-continued) (zerop (forward-line 1))
1563 (< (point) end-region-mark))
1564 (if (looking-at "[ \t]*!")
1565 (f90-indent-to (f90-comment-indent))
1566 (or (= (current-indentation)
1567 (+ ind-curr f90-continuation-indent))
1569 (+ ind-curr f90-continuation-indent) 'no-line-no)))))
1570 ;; Restore point, etc.
1571 (setq f90-cache-position nil)
1572 (goto-char save-point)
1573 (set-marker end-region-mark nil)
1574 (set-marker save-point nil)
1575 (if (fboundp 'zmacs-deactivate-region)
1576 (zmacs-deactivate-region)
1577 (deactivate-mark))))
1579 (defun f90-indent-subprogram ()
1580 "Properly indent the subprogram containing point."
1583 (let ((program (f90-mark-subprogram)))
1586 (message "Indenting %s %s..."
1587 (car program) (car (cdr program)))
1588 (indent-region (point) (mark) nil)
1589 (message "Indenting %s %s...done"
1590 (car program) (car (cdr program))))
1591 (message "Indenting the whole file...")
1592 (indent-region (point) (mark) nil)
1593 (message "Indenting the whole file...done")))))
1595 (defun f90-break-line (&optional no-update)
1596 "Break line at point, insert continuation marker(s) and indent.
1597 Unless in a string or comment, or if the optional argument NO-UPDATE
1598 is non-nil, call `f90-update-line' after inserting the continuation marker."
1600 (cond ((f90-in-string)
1603 (delete-horizontal-space 'backwards) ; remove trailing whitespace
1604 (insert "\n" (f90-get-present-comment-type)))
1606 (or no-update (f90-update-line))
1608 (if f90-beginning-ampersand (insert "&"))))
1609 (indent-according-to-mode))
1611 (defun f90-find-breakpoint ()
1612 "From `fill-column', search backward for break-delimiter."
1613 (re-search-backward f90-break-delimiters (line-beginning-position))
1614 (if (not f90-break-before-delimiters)
1615 (forward-char (if (looking-at f90-no-break-re) 2 1))
1617 (or (looking-at f90-no-break-re)
1620 (defun f90-do-auto-fill ()
1621 "Break line if non-white characters beyond `fill-column'.
1622 Update keyword case first."
1624 ;; Break line before or after last delimiter (non-word char) if
1625 ;; position is beyond fill-column.
1626 ;; Will not break **, //, or => (as specified by f90-no-break-re).
1628 ;; Need this for `f90-electric-insert' and other f90- callers.
1629 (unless (and (boundp 'comment-auto-fill-only-comments)
1630 comment-auto-fill-only-comments
1631 (not (f90-in-comment)))
1632 (while (> (current-column) fill-column)
1633 (let ((pos-mark (point-marker)))
1634 (move-to-column fill-column)
1635 (or (f90-in-string) (f90-find-breakpoint))
1637 (goto-char pos-mark)
1638 (set-marker pos-mark nil)))))
1640 (defun f90-join-lines (&optional arg)
1641 "Join current line to previous, fix whitespace, continuation, comments.
1642 With optional argument ARG, join current line to following line.
1643 Like `join-line', but handles F90 syntax."
1646 (if arg (forward-line 1))
1647 (when (eq (preceding-char) ?\n)
1648 (skip-chars-forward " \t")
1649 (if (looking-at "\&") (delete-char 1))
1651 (delete-region (point) (1- (point)))
1652 (skip-chars-backward " \t")
1653 (and (eq (preceding-char) ?&) (delete-char -1))
1654 (and (f90-in-comment)
1655 (looking-at "[ \t]*!+")
1658 (fixup-whitespace))))
1660 (defun f90-fill-region (beg-region end-region)
1661 "Fill every line in region by forward parsing. Join lines if possible."
1663 (let ((end-region-mark (copy-marker end-region))
1665 f90-smart-end f90-auto-keyword-case auto-fill-function)
1666 (goto-char beg-region)
1668 ;; Join as much as possible.
1671 (skip-chars-backward " \t")
1672 (eq (preceding-char) ?&))
1673 (f90-join-lines 'forward))
1674 ;; Chop the line if necessary.
1675 (while (> (save-excursion (end-of-line) (current-column))
1677 (move-to-column fill-column)
1678 (f90-find-breakpoint)
1679 (f90-break-line 'no-update))
1680 (setq go-on (and (< (point) end-region-mark)
1681 (zerop (forward-line 1)))
1682 f90-cache-position (point)))
1683 (setq f90-cache-position nil)
1684 (set-marker end-region-mark nil)
1685 (if (fboundp 'zmacs-deactivate-region)
1686 (zmacs-deactivate-region)
1687 (deactivate-mark))))
1689 (defun f90-block-match (beg-block beg-name end-block end-name)
1690 "Match end-struct with beg-struct and complete end-block if possible.
1691 BEG-BLOCK is the type of block as indicated at the start (e.g., do).
1692 BEG-NAME is the block start name (may be nil).
1693 END-BLOCK is the type of block as indicated at the end (may be nil).
1694 END-NAME is the block end name (may be nil).
1695 Leave point at the end of line."
1696 ;; Hack to deal with the case when this is called from
1697 ;; f90-indent-region on a program block without an explicit PROGRAM
1698 ;; statement at the start. Should really be an error (?).
1699 (or beg-block (setq beg-block "program"))
1700 (search-forward "end" (line-end-position))
1702 (if (and end-block (f90-equal-symbols beg-block end-block))
1703 (search-forward end-block)
1706 (message "END %s does not match %s." end-block beg-block)
1708 (throw 'no-match nil))
1709 (message "Inserting %s." beg-block)
1710 (insert (concat " " beg-block))))
1711 (if (f90-equal-symbols beg-name end-name)
1712 (and end-name (search-forward end-name))
1713 (cond ((and beg-name (not end-name))
1714 (message "Inserting %s." beg-name)
1715 (insert (concat " " beg-name)))
1716 ((and beg-name end-name)
1717 (message "Replacing %s with %s." end-name beg-name)
1718 (search-forward end-name)
1719 (replace-match beg-name))
1720 ((and (not beg-name) end-name)
1721 (message "Deleting %s." end-name)
1722 (search-forward end-name)
1723 (replace-match ""))))
1724 (or (looking-at "[ \t]*!") (delete-horizontal-space))))
1726 (defun f90-match-end ()
1727 "From an end block statement, find the corresponding block and name."
1730 (top-of-window (window-start))
1732 (case-fold-search t)
1733 matching-beg beg-name end-name beg-block end-block end-struct)
1734 (when (save-excursion (beginning-of-line) (skip-chars-forward " \t0-9")
1735 (setq end-struct (f90-looking-at-program-block-end)))
1736 (setq end-block (car end-struct)
1737 end-name (car (cdr end-struct)))
1740 (while (and (> count 0)
1741 (not (= (line-beginning-position) (point-min))))
1742 (re-search-backward f90-blocks-re nil 'move)
1744 ;; GM not a line number if continued line.
1745 ;;; (skip-chars-forward " \t")
1746 ;;; (skip-chars-forward "0-9")
1747 (skip-chars-forward " \t0-9")
1748 (cond ((or (f90-in-string) (f90-in-comment)))
1752 (f90-looking-at-if-then)
1753 (f90-looking-at-where-or-forall)
1754 (f90-looking-at-select-case)
1755 (f90-looking-at-type-like)
1756 (f90-looking-at-program-block-start)
1757 ;; Interpret a single END without a block
1758 ;; start to be the END of a program block
1759 ;; without an initial PROGRAM line.
1760 (if (= (line-beginning-position) (point-min))
1762 (setq count (1- count)))
1763 ((looking-at (concat "end[ \t]*" f90-blocks-re))
1764 (setq count (1+ count)))))
1766 (message "No matching beginning.")
1768 (if (eq f90-smart-end 'blink)
1769 (if (< (point) top-of-window)
1770 (message "Matches %s: %s"
1773 (line-beginning-position)
1774 (line-end-position)))
1775 (sit-for blink-matching-delay)))
1776 (setq beg-block (car matching-beg)
1777 beg-name (car (cdr matching-beg)))
1778 (goto-char end-point)
1780 (f90-block-match beg-block beg-name end-block end-name))))))
1782 (defun f90-insert-end ()
1783 "Insert a complete end statement matching beginning of present block."
1785 (let ((f90-smart-end (or f90-smart-end 'blink)))
1787 (f90-indent-new-line)))
1789 ;; Abbrevs and keywords.
1791 (defun f90-abbrev-start ()
1792 "Typing `\\[help-command] or `? lists all the F90 abbrevs.
1793 Any other key combination is executed normally."
1795 (insert last-command-char)
1797 (if (fboundp 'next-command-event) ; XEmacs
1798 (setq event (next-command-event)
1799 char (and (fboundp 'event-to-character)
1800 (event-to-character event)))
1801 (setq event (read-event)
1803 ;; Insert char if not equal to `?', or if abbrev-mode is off.
1804 (if (and abbrev-mode (or (eq char ??) (eq char help-char)))
1806 (setq unread-command-events (list event)))))
1808 (defun f90-abbrev-help ()
1809 "List the currently defined abbrevs in F90 mode."
1811 (message "Listing abbrev table...")
1812 (display-buffer (f90-prepare-abbrev-list-buffer))
1813 (message "Listing abbrev table...done"))
1815 (defun f90-prepare-abbrev-list-buffer ()
1816 "Create a buffer listing the F90 mode abbreviations."
1818 (set-buffer (get-buffer-create "*Abbrevs*"))
1820 (insert-abbrev-table-description 'f90-mode-abbrev-table t)
1821 (goto-char (point-min))
1822 (set-buffer-modified-p nil)
1823 (edit-abbrevs-mode))
1824 (get-buffer-create "*Abbrevs*"))
1826 (defun f90-upcase-keywords ()
1827 "Upcase all F90 keywords in the buffer."
1829 (f90-change-keywords 'upcase-word))
1831 (defun f90-capitalize-keywords ()
1832 "Capitalize all F90 keywords in the buffer."
1834 (f90-change-keywords 'capitalize-word))
1836 (defun f90-downcase-keywords ()
1837 "Downcase all F90 keywords in the buffer."
1839 (f90-change-keywords 'downcase-word))
1841 (defun f90-upcase-region-keywords (beg end)
1842 "Upcase all F90 keywords in the region."
1844 (f90-change-keywords 'upcase-word beg end))
1846 (defun f90-capitalize-region-keywords (beg end)
1847 "Capitalize all F90 keywords in the region."
1849 (f90-change-keywords 'capitalize-word beg end))
1851 (defun f90-downcase-region-keywords (beg end)
1852 "Downcase all F90 keywords in the region."
1854 (f90-change-keywords 'downcase-word beg end))
1856 ;; Change the keywords according to argument.
1857 (defun f90-change-keywords (change-word &optional beg end)
1858 "Change the case of F90 keywords in the region (if specified) or buffer.
1859 CHANGE-WORD should be one of 'upcase-word, 'downcase-word, 'capitalize-word."
1861 (setq beg (or beg (point-min))
1862 end (or end (point-max)))
1865 f90-keywords-re "\\|" f90-procedures-re "\\|"
1866 f90-hpf-keywords-re "\\|" f90-operators-re "\\)"))
1867 (ref-point (point-min))
1868 (modified (buffer-modified-p))
1869 state saveword back-point)
1872 (while (re-search-forward keyword-re end t)
1874 (setq state (parse-partial-sexp ref-point (point)))
1875 (or (nth 3 state) (nth 4 state)
1876 ;; GM f90-directive-comment-re?
1877 (save-excursion ; check for cpp directive
1879 (skip-chars-forward " \t0-9")
1881 (setq ref-point (point)
1882 back-point (save-excursion (backward-word 1) (point))
1883 saveword (buffer-substring back-point ref-point))
1884 (funcall change-word -1)
1885 (or (string= saveword (buffer-substring back-point ref-point))
1886 (setq modified t))))
1887 (or modified (set-buffer-modified-p nil))))))
1890 (defun f90-current-defun ()
1891 "Function to use for `add-log-current-defun-function' in F90 mode."
1893 (nth 1 (f90-beginning-of-subprogram))))
1896 (defun f90-backslash-not-special (&optional all)
1897 "Make the backslash character (\\) be non-special in the current buffer.
1898 With optional argument ALL, change the default for all present
1899 and future F90 buffers. F90 mode normally treats backslash as an
1901 (or (eq major-mode 'f90-mode)
1902 (error "This function should only be used in F90 buffers"))
1903 (when (equal (char-syntax ?\\ ) ?\\ )
1904 (or all (set-syntax-table (copy-syntax-table (syntax-table))))
1905 (modify-syntax-entry ?\\ ".")))
1910 ;;; arch-tag: fceac97c-c147-44bd-aec0-172d4b560ef8
1911 ;;; f90.el ends here