;;; fortran.el --- Fortran mode for GNU Emacs
-;;; Copyright (c) 1986, 1993, 1994, 1995 Free Software Foundation, Inc.
+;; Copyright (c) 1986, 93, 94, 95, 97, 98, 1999 Free Software Foundation, Inc.
;; Author: Michael D. Prange <prange@erl.mit.edu>
-;; Maintainer: bug-fortran-mode@erl.mit.edu
-;; Version 1.30.6 (July 27, 1995)
+;; Maintainer: Dave Love <fx@gnu.org>
;; Keywords: languages
;; This file is part of GNU Emacs.
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with GNU Emacs; see the file COPYING. If not, write to
-;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+;; along with GNU Emacs; see the file COPYING. If not, write to the
+;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+;; Boston, MA 02111-1307, USA.
;;; Commentary:
-;; Fortran mode has been upgraded and is now maintained by Stephen A. Wood
-;; (saw@cebaf.gov). It now will use either fixed format continuation line
-;; markers (character in 6th column), or tab format continuation line style
-;; (digit after a TAB character.) A auto-fill mode has been added to
-;; automatically wrap fortran lines that get too long.
+;; This mode is documented in the Emacs manual.
+;;
+;; Note that it is for editing Fortran77 or Fortran90 fixed source
+;; form. For editing Fortran 90 free format source, use `f90-mode'
+;; (f90.el).
+
+;;; History:
+
+;; Fortran mode was upgraded by Stephen A. Wood (saw@cebaf.gov).
;; We acknowledge many contributions and valuable suggestions by
;; Lawrence R. Dodd, Ralf Fassel, Ralph Finch, Stephen Gildea,
-;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
+;; Dr. Anil Gokhale, Ulrich Mueller, Mark Neale, Eric Prestemon,
;; Gary Sabot and Richard Stallman.
-;;; This file may be used with GNU Emacs version 18.xx if the following
-;;; variable and function substitutions are made.
-;;; Replace:
-;;; frame-width with screen-width
-;;; auto-fill-function with auto-fill-hook
-;;; comment-indent-function with comment-indent-hook
-;;; (setq unread-command-events (list c)) with (setq unread-command-char c)
+;;; Code:
+
+;; Todo:
-;;; Bugs to bug-fortran-mode@erl.mit.edu
+;; * Tidy it all up! (including renaming non-`fortran' prefixed
+;; functions).
+;; * Implement insertion and removal of statement continuations in
+;; mixed f77/f90 style, with the first `&' past column 72 and the
+;; second in column 6.
+;; * Support any other extensions to f77 grokked by GNU Fortran.
+;; * Change fontification to use font-lock-syntactic-keywords for
+;; fixed-form comments. (Done, but doesn't work properly with
+;; lazy-lock in pre-20.4.)
-(defconst fortran-mode-version "version 1.30.6")
+(require 'easymenu)
+
+(defgroup fortran nil
+ "Fortran mode for Emacs"
+ :link '(custom-manual "(emacs)Fortran")
+ :group 'languages)
+
+(defgroup fortran-indent nil
+ "Indentation variables in Fortran mode"
+ :prefix "fortran-"
+ :group 'fortran)
+
+(defgroup fortran-comment nil
+ "Comment-handling variables in Fortran mode"
+ :prefix "fortran-"
+ :group 'fortran)
-;;; Code:
;;;###autoload
-(defvar fortran-tab-mode-default nil
+(defcustom fortran-tab-mode-default nil
"*Default tabbing/carriage control style for empty files in Fortran mode.
A value of t specifies tab-digit style of continuation control.
A value of nil specifies that continuation lines are marked
-with a character in column 6.")
+with a character in column 6."
+ :type 'boolean
+ :group 'fortran-indent)
;; Buffer local, used to display mode line.
-(defvar fortran-tab-mode-string nil
- "String to appear in mode line when TAB format mode is on.")
-
-(defvar fortran-do-indent 3
- "*Extra indentation applied to DO blocks.")
-
-(defvar fortran-if-indent 3
- "*Extra indentation applied to IF blocks.")
-
-(defvar fortran-structure-indent 3
- "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks.")
-
-(defvar fortran-continuation-indent 5
- "*Extra indentation applied to Fortran continuation lines.")
-
-(defvar fortran-comment-indent-style 'fixed
- "*nil forces comment lines not to be touched,
+(defcustom fortran-tab-mode-string nil
+ "String to appear in mode line when TAB format mode is on."
+ :type '(choice (const nil) string)
+ :group 'fortran-indent)
+(make-variable-buffer-local 'fortran-tab-mode-string)
+
+(defcustom fortran-do-indent 3
+ "*Extra indentation applied to DO blocks."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-if-indent 3
+ "*Extra indentation applied to IF blocks."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-structure-indent 3
+ "*Extra indentation applied to STRUCTURE, UNION, MAP and INTERFACE blocks."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-continuation-indent 5
+ "*Extra indentation applied to Fortran continuation lines."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-comment-indent-style 'fixed
+ "*How to indent comments.
+nil forces comment lines not to be touched,
'fixed makes fixed comment indentation to `fortran-comment-line-extra-indent'
columns beyond `fortran-minimum-statement-indent-fixed' (for
`indent-tabs-mode' of nil) or `fortran-minimum-statement-indent-tab' (for
`indent-tabs-mode' of t), and 'relative indents to current
-Fortran indentation plus `fortran-comment-line-extra-indent'.")
-
-(defvar fortran-comment-line-extra-indent 0
- "*Amount of extra indentation for text within full-line comments.")
-
-(defvar comment-line-start nil
- "*Delimiter inserted to start new full-line comment.")
-
-(defvar comment-line-start-skip nil
- "*Regexp to match the start of a full-line comment.")
-
-(defvar fortran-minimum-statement-indent-fixed 6
- "*Minimum statement indentation for fixed format continuation style.")
-
-(defvar fortran-minimum-statement-indent-tab (max tab-width 6)
- "*Minimum statement indentation for TAB format continuation style.")
+Fortran indentation plus `fortran-comment-line-extra-indent'."
+ :type '(radio (const :tag "Untouched" nil) (const fixed) (const relative))
+ :group 'fortran-indent)
+
+(defcustom fortran-comment-line-extra-indent 0
+ "*Amount of extra indentation for text within full-line comments."
+ :type 'integer
+ :group 'fortran-indent
+ :group 'fortran-comment)
+
+(defcustom comment-line-start nil
+ "*Delimiter inserted to start new full-line comment."
+ :type '(choice string (const nil))
+ :group 'fortran-comment)
+
+(defcustom comment-line-start-skip nil
+ "*Regexp to match the start of a full-line comment."
+ :type '(choice string (const nil))
+ :group 'fortran-comment)
+
+(defcustom fortran-minimum-statement-indent-fixed 6
+ "*Minimum statement indentation for fixed format continuation style."
+ :type 'integer
+ :group 'fortran-indent)
+
+(defcustom fortran-minimum-statement-indent-tab (max tab-width 6)
+ "*Minimum statement indentation for TAB format continuation style."
+ :type 'integer
+ :group 'fortran-indent)
;; Note that this is documented in the v18 manuals as being a string
;; of length one rather than a single character.
;; The code in this file accepts either format for compatibility.
-(defvar fortran-comment-indent-char " "
+(defcustom fortran-comment-indent-char " "
"*Single-character string inserted for Fortran comment indentation.
-Normally a space.")
+Normally a space."
+ :type 'string
+ :group 'fortran-comment)
-(defvar fortran-line-number-indent 1
+(defcustom fortran-line-number-indent 1
"*Maximum indentation for Fortran line numbers.
-5 means right-justify them within their five-column field.")
+5 means right-justify them within their five-column field."
+ :type 'integer
+ :group 'fortran-indent)
-(defvar fortran-check-all-num-for-matching-do nil
- "*Non-nil causes all numbered lines to be treated as possible DO loop ends.")
+(defcustom fortran-check-all-num-for-matching-do nil
+ "*Non-nil causes all numbered lines to be treated as possible DO loop ends."
+ :type 'boolean
+ :group 'fortran)
-(defvar fortran-blink-matching-if nil
+(defcustom fortran-blink-matching-if nil
"*Non-nil causes \\[fortran-indent-line] on ENDIF statement to blink on matching IF.
-Also, from an ENDDO statement blink on matching DO [WHILE] statement.")
+Also, from an ENDDO statement blink on matching DO [WHILE] statement."
+ :type 'boolean
+ :group 'fortran)
-(defvar fortran-continuation-string "$"
+(defcustom fortran-continuation-string "$"
"*Single-character string used for Fortran continuation lines.
In fixed format continuation style, this character is inserted in
column 6 by \\[fortran-split-line] to begin a continuation line.
Also, if \\[fortran-indent-line] finds this at the beginning of a line, it will
convert the line into a continuation line of the appropriate style.
-Normally $.")
-
-(defvar fortran-comment-region "c$$$"
- "*String inserted by \\[fortran-comment-region]\
- at start of each line in region.")
-
-(defvar fortran-electric-line-number t
- "*Non-nil causes line number digits to be moved to the correct column as\
- typed.")
-
-(defvar fortran-startup-message t
- "*Non-nil displays a startup message when Fortran mode is first called.")
+Normally $."
+ :type 'string
+ :group 'fortran)
+
+(defcustom fortran-comment-region "c$$$"
+ "*String inserted by \\[fortran-comment-region] at start of each \
+line in region."
+ :type 'string
+ :group 'fortran-comment)
+
+(defcustom fortran-electric-line-number t
+ "*Non-nil causes line number digits to be moved to the correct \
+column as typed."
+ :type 'boolean
+ :group 'fortran)
(defvar fortran-column-ruler-fixed
"0 4 6 10 20 30 40 5\
-\0 60 70\n\
+0 60 70\n\
\[ ]|{ | | | | | | | | \
\| | | | |}\n"
- "*String displayed above current line by \\[fortran-column-ruler].
+ "String displayed above current line by \\[fortran-column-ruler].
This variable used in fixed format mode.")
(defvar fortran-column-ruler-tab
"0 810 20 30 40 5\
-\0 60 70\n\
+0 60 70\n\
\[ ]| { | | | | | | | | \
\| | | | |}\n"
- "*String displayed above current line by \\[fortran-column-ruler].
+ "String displayed above current line by \\[fortran-column-ruler].
This variable used in TAB format mode.")
-(defconst bug-fortran-mode "bug-fortran-mode@erl.mit.edu"
- "Address of mailing list for Fortran mode bugs.")
-
(defvar fortran-mode-syntax-table nil
"Syntax table in use in Fortran mode buffers.")
(defvar fortran-analyze-depth 100
- "Number of lines to scan to determine whether to use fixed or TAB format\
- style.")
+ "Number of lines to scan to determine whether to use fixed or TAB \
+format style.")
-(defvar fortran-break-before-delimiters t
- "*Non-nil causes `fortran-fill' to break lines before delimiters.")
+(defcustom fortran-break-before-delimiters t
+ "*Non-nil causes filling to break lines before delimiters."
+ :type 'boolean
+ :group 'fortran)
(if fortran-mode-syntax-table
()
(setq fortran-mode-syntax-table (make-syntax-table))
+ ;; We might like `;' to be punctuation (g77 multi-statement lines),
+ ;; but that screws abbrevs.
(modify-syntax-entry ?\; "w" fortran-mode-syntax-table)
(modify-syntax-entry ?\r " " fortran-mode-syntax-table)
(modify-syntax-entry ?+ "." fortran-mode-syntax-table)
(modify-syntax-entry ?/ "." fortran-mode-syntax-table)
(modify-syntax-entry ?\' "\"" fortran-mode-syntax-table)
(modify-syntax-entry ?\" "\"" fortran-mode-syntax-table)
- (modify-syntax-entry ?\\ "/" fortran-mode-syntax-table)
- (modify-syntax-entry ?. "w" fortran-mode-syntax-table)
- (modify-syntax-entry ?_ "w" fortran-mode-syntax-table)
+ (modify-syntax-entry ?\\ "\\" fortran-mode-syntax-table)
+ ;; This might be better as punctuation, as for C, but this way you
+ ;; can treat floating-point numbers as symbols.
+ (modify-syntax-entry ?. "_" fortran-mode-syntax-table) ; e.g. `a.ne.b'
+ (modify-syntax-entry ?_ "_" fortran-mode-syntax-table)
+ (modify-syntax-entry ?$ "_" fortran-mode-syntax-table) ; esp. VMSisms
(modify-syntax-entry ?\! "<" fortran-mode-syntax-table)
(modify-syntax-entry ?\n ">" fortran-mode-syntax-table))
-;; Comments are real pain in Fortran because there is no way to represent the
-;; standard comment syntax in an Emacs syntax table (we can for VAX-style).
-;; Therefore an unmatched quote in a standard comment will throw fontification
-;; off on the wrong track. So we do syntactic fontification with regexps.
-
+;; Comments are real pain in Fortran because there is no way to
+;; represent the standard comment syntax in an Emacs syntax table.
+;; (We can do so for F90-style). Therefore an unmatched quote in a
+;; standard comment will throw fontification off on the wrong track.
+;; So we do syntactic fontification with regexps.
+\f
;; Regexps done by simon@gnu with help from Ulrik Dickow <dickow@nbi.dk> and
;; probably others Si's forgotten about (sorry).
-(defconst fortran-font-lock-keywords-1
- (let ((comment-chars "c!*"))
- (list
- ;;
- ;; Fontify comments and strings. We assume that strings cannot be quoted.
- (cons (concat "^[" comment-chars "].*") 'font-lock-comment-face)
- '(fortran-match-!-comment . font-lock-comment-face)
- (list (concat "^[^" comment-chars "\t\n]" (make-string 71 ?.) "\\(.*\\)")
- '(1 font-lock-comment-face))
- '("'[^'\n]*'?" . font-lock-string-face)
- ;;
- ;; Program, subroutine and function declarations, plus calls.
- (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
- "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
- '(1 font-lock-keyword-face)
- '(2 font-lock-function-name-face nil t))))
+(defconst fortran-font-lock-keywords-1 nil
"Subdued level highlighting for Fortran mode.")
-(defconst fortran-font-lock-keywords-2
- (append fortran-font-lock-keywords-1
- (let ((type-types
-; (make-regexp
-; (let ((simple-types '("character" "byte" "integer" "logical"
-; "none" "real" "complex"
-; "double[ \t]*precision" "double[ \t]*complex"))
-; (structured-types '("structure" "union" "map"))
-; (other-types '("record" "dimension" "parameter" "common" "save"
-; "external" "intrinsic" "data" "equivalence")))
-; (append
-; (mapcar (lambda (x) (concat "implicit[ \t]*" x)) simple-types)
-; simple-types
-; (mapcar (lambda (x) (concat "end[ \t]*" x)) structured-types)
-; structured-types
-; other-types)))
- (concat "byte\\|c\\(haracter\\|om\\(mon\\|plex\\)\\)\\|"
- "d\\(ata\\|imension\\|ouble"
- "[ \t]*\\(complex\\|precision\\)\\)\\|"
- "e\\(nd[ \t]*\\(map\\|structure\\|union\\)\\|"
- "quivalence\\|xternal\\)\\|"
- "i\\(mplicit[ \t]*\\(byte\\|"
- "c\\(haracter\\|omplex\\)\\|"
- "double[ \t]*\\(complex\\|precision\\)\\|"
- "integer\\|logical\\|none\\|real\\)\\|"
- "nt\\(eger\\|rinsic\\)\\)\\|"
- "logical\\|map\\|none\\|parameter\\|re\\(al\\|cord\\)\\|"
- "s\\(ave\\|tructure\\)\\|union"))
- (fkeywords
-; ("continue" "format" "end" "enddo" "if" "then" "else" "endif"
-; "elseif" "while" "inquire" "stop" "return" "include" "open"
-; "close" "read" "write" "format" "print")
- (concat "c\\(lose\\|ontinue\\)\\|"
- "e\\(lse\\(\\|if\\)\\|nd\\(\\|do\\|if\\)\\)\\|format\\|"
- "i\\(f\\|n\\(clude\\|quire\\)\\)\\|open\\|print\\|"
- "re\\(ad\\|turn\\)\\|stop\\|then\\|w\\(hile\\|rite\\)"))
- (flogicals
-; ("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne" "true" "false")
- "and\\|eq\\|false\\|g[et]\\|l[et]\\|n\\(e\\|ot\\)\\|or\\|true"))
- (list
- ;;
- ;; Fontify types and variable names (but not length specs or `/'s).
- (list (concat "\\<\\(" type-types "\\)\\>[0-9 \t/*]*\\(\\sw+\\)?")
- '(1 font-lock-type-face)
- '(15 font-lock-variable-name-face nil t))
- ;;
- ;; Fontify all builtin keywords (except logical, do and goto; see below).
- (concat "\\<\\(" fkeywords "\\)\\>")
- ;;
- ;; Fontify all builtin operators.
- (concat "\\.\\(" flogicals "\\)\\.")
- ;;
- ;; Fontify do/goto keywords and targets, and goto tags.
- (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
- '(1 font-lock-keyword-face)
- '(2 font-lock-reference-face nil t))
- (cons "^ *\\([0-9]+\\)" 'font-lock-reference-face))))
+(defconst fortran-font-lock-keywords-2 nil
"Medium level highlighting for Fortran mode.")
-(defconst fortran-font-lock-keywords-3
- (append fortran-font-lock-keywords-2
- (list
- ;;
- ;; Fontify goto-like `err=label'/`end=label' in read/write statements.
- (list ", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
- '(1 font-lock-keyword-face)
- '(4 font-lock-reference-face nil t))
- ;;
- ;; Highlight a standard continuation character and in a TAB-formatted line.
- '("^ \\([^ 0]\\)" 1 font-lock-string-face)
- '("^\t\\([1-9]\\)" 1 font-lock-string-face)))
+(defconst fortran-font-lock-keywords-3 nil
"Gaudy level highlighting for Fortran mode.")
+(defconst fortran-font-lock-syntactic-keywords nil
+ "`font-lock-syntactic-keywords' for Fortran.
+These get fixed-format comments fontified.")
+
+(let ((comment-chars "cd") ; `d' for `debugging' comments
+ (fortran-type-types
+ (eval-when-compile
+ (let ((re (regexp-opt
+ (let ((simple-types
+ '("character" "byte" "integer" "logical"
+ "none" "real" "complex"
+ "double precision" "double complex"))
+ (structured-types '("structure" "union" "map"))
+ (other-types '("record" "dimension"
+ "parameter" "common" "save"
+ "external" "intrinsic" "data"
+ "equivalence")))
+ (append
+ (mapcar (lambda (x) (concat "implicit " x))
+ simple-types)
+ simple-types
+ (mapcar (lambda (x) (concat "end " x))
+ structured-types)
+ structured-types
+ other-types)))))
+ ;; In the optimized regexp above, replace spaces by regexp
+ ;; for optional whitespace, which regexp-opt would have
+ ;; escaped.
+ (mapconcat #'identity (split-string re) "[ \t]*"))))
+ (fortran-keywords
+ (eval-when-compile
+ (regexp-opt '("continue" "format" "end" "enddo" "if" "then"
+ "else" "endif" "elseif" "while" "inquire" "stop"
+ "return" "include" "open" "close" "read" "write"
+ "format" "print" "select" "case" "cycle" "exit"))))
+ (fortran-logicals
+ (eval-when-compile
+ (regexp-opt '("and" "or" "not" "lt" "le" "eq" "ge" "gt" "ne"
+ "true" "false")))))
+
+ (setq fortran-font-lock-syntactic-keywords
+ ;; Fixed format comments. (!-style handled normally.)
+ (list
+ (list (concat "^[" comment-chars "]") 0 '(11))
+ (list (concat "^[^" comment-chars "\t\n]" (make-string 71 ?.)
+ "\\([^\n]+\\)")
+ 1 '(11))))
+
+ (setq fortran-font-lock-keywords-1
+ (list
+ ;;
+ ;; Program, subroutine and function declarations, plus calls.
+ (list (concat "\\<\\(block[ \t]*data\\|call\\|entry\\|function\\|"
+ "program\\|subroutine\\)\\>[ \t]*\\(\\sw+\\)?")
+ '(1 font-lock-keyword-face)
+ '(2 font-lock-function-name-face nil t))))
+
+ (setq fortran-font-lock-keywords-2
+ (append fortran-font-lock-keywords-1
+ (list
+ ;;
+ ;; Fontify all type specifiers (must be first; see below).
+ (cons (concat "\\<\\(" fortran-type-types "\\)\\>")
+ 'font-lock-type-face)
+ ;;
+ ;; Fontify all builtin keywords (except logical, do
+ ;; and goto; see below).
+ (concat "\\<\\(" fortran-keywords "\\)\\>")
+ ;;
+ ;; Fontify all builtin operators.
+ (concat "\\.\\(" fortran-logicals "\\)\\.")
+ ;;
+ ;; Fontify do/goto keywords and targets, and goto tags.
+ (list "\\<\\(do\\|go *to\\)\\>[ \t]*\\([0-9]+\\)?"
+ '(1 font-lock-keyword-face)
+ '(2 font-lock-constant-face nil t))
+ (cons "^ *\\([0-9]+\\)" 'font-lock-constant-face))))
+
+ (setq fortran-font-lock-keywords-3
+ (append
+ ;;
+ ;; The list `fortran-font-lock-keywords-1'.
+ fortran-font-lock-keywords-1
+ ;;
+ ;; Fontify all type specifiers plus their declared items.
+ (list
+ (list (concat "\\<\\(" fortran-type-types "\\)\\>[ \t(/]*\\(*\\)?")
+ ;; Fontify the type specifier.
+ '(1 font-lock-type-face)
+ ;; Fontify each declaration item (or just the /.../ block name).
+ `(font-lock-match-c-style-declaration-item-and-skip-to-next
+ ;; Start after any *(...) expression.
+ (condition-case nil
+ (and (and (match-beginning ,(+ 2 (regexp-opt-depth
+ fortran-type-types)))
+ (forward-sexp))
+ (forward-sexp))
+ (error nil))
+ ;; No need to clean up.
+ nil
+ ;; Fontify as a variable name, functions are
+ ;; fontified elsewhere.
+ (1 font-lock-variable-name-face nil t))))
+ ;;
+ ;; Things extra to `fortran-font-lock-keywords-3'
+ ;; (must be done first).
+ (list
+ ;;
+ ;; Fontify goto-like `err=label'/`end=label' in read/write
+ ;; statements.
+ '(", *\\(e\\(nd\\|rr\\)\\)\\> *\\(= *\\([0-9]+\\)\\)?"
+ (1 font-lock-keyword-face) (4 font-lock-constant-face nil t))
+ ;;
+ ;; Highlight standard continuation character and in a
+ ;; TAB-formatted line.
+ '("^ \\([^ 0]\\)" 1 font-lock-string-face)
+ '("^\t\\([1-9]\\)" 1 font-lock-string-face))
+ ;;
+ ;; The list `fortran-font-lock-keywords-2' less that for types
+ ;; (see above).
+ (cdr (nthcdr (length fortran-font-lock-keywords-1)
+ fortran-font-lock-keywords-2)))))
+
(defvar fortran-font-lock-keywords fortran-font-lock-keywords-1
"Default expressions to highlight in Fortran mode.")
-
-(defvar fortran-mode-map ()
+\f
+(defvar fortran-imenu-generic-expression
+ ;; These patterns could be confused by sequence nos. in cols 72+ and
+ ;; don't allow continuations everywhere.
+ (list
+ (list
+ nil
+ ;; Lines below are: 1. leading whitespace; 2. function
+ ;; declaration with optional type, e.g. `real', `real*4',
+ ;; character(*), `double precision' and possible statement
+ ;; continuation; 3. untyped declarations; 4. the variable to
+ ;; index. [This will be fooled by `end function' allowed by G77.
+ ;; Also, it assumes sensible whitespace is employed.]
+ (concat "^\\s-+\\(\
+\\(\\sw\\|\\s-\\|[*()+]\\)*\
+\\<function\\|subroutine\\|entry\\|block\\s-*data\\|program\\)\
+[ \t" fortran-continuation-string "]+\
+\\(\\sw+\\)")
+ 3)
+ ;; Un-named block data
+ (list nil "^\\s-+\\(block\\s-*data\\)\\s-*$" 1))
+ "Imenu generic expression for `imenu-default-create-index-function'.")
+
+(defvar fortran-mode-map ()
"Keymap used in Fortran mode.")
(if fortran-mode-map
()
(setq fortran-mode-map (make-sparse-keymap))
(define-key fortran-mode-map ";" 'fortran-abbrev-start)
(define-key fortran-mode-map "\C-c;" 'fortran-comment-region)
- (define-key fortran-mode-map "\e\C-a" 'beginning-of-fortran-subprogram)
- (define-key fortran-mode-map "\e\C-e" 'end-of-fortran-subprogram)
- (define-key fortran-mode-map "\e;" 'fortran-indent-comment)
- (define-key fortran-mode-map "\e\C-h" 'mark-fortran-subprogram)
- (define-key fortran-mode-map "\e\n" 'fortran-split-line)
+ (define-key fortran-mode-map "\M-\C-a" 'beginning-of-fortran-subprogram)
+ (define-key fortran-mode-map "\M-\C-e" 'end-of-fortran-subprogram)
+ (define-key fortran-mode-map "\M-;" 'fortran-indent-comment)
+ (define-key fortran-mode-map "\M-\C-h" 'mark-fortran-subprogram)
+ (define-key fortran-mode-map "\M-\n" 'fortran-split-line)
(define-key fortran-mode-map "\n" 'fortran-indent-new-line)
- (define-key fortran-mode-map "\e\C-q" 'fortran-indent-subprogram)
+ (define-key fortran-mode-map "\M-\C-q" 'fortran-indent-subprogram)
(define-key fortran-mode-map "\C-c\C-w" 'fortran-window-create-momentarily)
(define-key fortran-mode-map "\C-c\C-r" 'fortran-column-ruler)
(define-key fortran-mode-map "\C-c\C-p" 'fortran-previous-statement)
(define-key fortran-mode-map "\C-c\C-n" 'fortran-next-statement)
- (define-key fortran-mode-map "\t" 'fortran-indent-line)
+ (define-key fortran-mode-map "\C-c\C-d" 'fortran-join-line) ; like f90
+ (define-key fortran-mode-map "\M-^" 'fortran-join-line) ; subvert delete-indentation
+ (define-key fortran-mode-map "\C-xnd" 'fortran-narrow-to-subprogram)
+ ;(define-key fortran-mode-map "\t" 'fortran-indent-line)
(define-key fortran-mode-map "0" 'fortran-electric-line-number)
(define-key fortran-mode-map "1" 'fortran-electric-line-number)
(define-key fortran-mode-map "2" 'fortran-electric-line-number)
(define-key fortran-mode-map "6" 'fortran-electric-line-number)
(define-key fortran-mode-map "7" 'fortran-electric-line-number)
(define-key fortran-mode-map "8" 'fortran-electric-line-number)
- (define-key fortran-mode-map "9" 'fortran-electric-line-number))
+ (define-key fortran-mode-map "9" 'fortran-electric-line-number)
+
+ ;; Menu
+ (unless (boundp 'fortran-mode-menu)
+ (easy-menu-define
+ fortran-mode-menu fortran-mode-map ""
+ '("Fortran"
+ ["Toggle Auto-fill" fortran-auto-fill-mode :style toggle
+ :selected (eq auto-fill-function 'fortran-do-auto-fill)]
+ ["Toggle abbrev-mode" abbrev-mode :style toggle :selected abbrev-mode]
+ "----"
+ ["Comment-out Region" fortran-comment-region mark-active]
+ ["Uncomment-out region"
+ (fortran-comment-region (region-beginning) (region-end) 1)
+ mark-active]
+ ["Indent Region" indent-region mark-active]
+ ["Indent Subprogram" fortran-indent-subprogram t]
+ "----"
+ ["Beginning of Subprogram" beginning-of-fortran-subprogram t]
+ ["End of Subprogram" end-of-fortran-subprogram t]
+ ("Mark"
+ ["Subprogram" mark-fortran-subprogram t]
+ ["IF Block" fortran-mark-if t]
+ ["DO Block" fortran-mark-do t])
+ ["Narrow to Subprogram" fortran-narrow-to-subprogram t]
+ ["Widen" widen t]
+ "----"
+ ["Temporary column ruler" fortran-column-ruler t]
+ ["72-column window" fortran-window-create t]
+ ["Full Width Window"
+ (enlarge-window-horizontally (- (frame-width) (window-width)))
+ (< (window-width) (frame-width))]
+ ["Momentary 72-column window" fortran-window-create-momentarily t]
+ "----"
+ ["Break Line at Point" fortran-split-line t]
+ ["Join Line" fortran-join-line t]
+ ["Fill Statement/Comment" fill-paragraph t]
+ "----"
+ ["Add imenu menu"
+ (progn (imenu-add-menubar-index)
+ ;; Prod menu bar to update -- is this the right way?
+ (menu-bar-mode 1))
+ (not (and (boundp 'imenu--index-alist)
+ imenu--index-alist))]))))
\f
(defvar fortran-mode-abbrev-table nil)
(if fortran-mode-abbrev-table
(define-abbrev fortran-mode-abbrev-table ";wh" "where" nil)
(setq abbrevs-changed ac)))
\f
+(eval-when-compile ; silence compiler
+ (defvar imenu-case-fold-search)
+ (defvar imenu-syntax-alist))
+
;;;###autoload
(defun fortran-mode ()
"Major mode for editing Fortran code.
-\\[fortran-indent-line] indents the current Fortran line correctly.
+\\[fortran-indent-line] indents the current Fortran line correctly.
DO statements must not share a common CONTINUE.
-Type ;? or ;\\[help-command] to display a list of built-in\
- abbrevs for Fortran keywords.
+Type ;? or ;\\[help-command] to display a list of built-in abbrevs for
+Fortran keywords.
Key definitions:
\\{fortran-mode-map}
Variables controlling indentation style and extra features:
- comment-start
+ `comment-start'
Normally nil in Fortran mode. If you want to use comments
starting with `!', set this to the string \"!\".
- fortran-do-indent
+ `fortran-do-indent'
Extra indentation within do blocks. (default 3)
- fortran-if-indent
+ `fortran-if-indent'
Extra indentation within if blocks. (default 3)
- fortran-structure-indent
+ `fortran-structure-indent'
Extra indentation within structure, union, map and interface blocks.
(default 3)
- fortran-continuation-indent
+ `fortran-continuation-indent'
Extra indentation applied to continuation statements. (default 5)
- fortran-comment-line-extra-indent
- Amount of extra indentation for text within full-line comments. (default 0)
- fortran-comment-indent-style
+ `fortran-comment-line-extra-indent'
+ Amount of extra indentation for text within full-line comments. (default 0)
+ `fortran-comment-indent-style'
nil means don't change indentation of text in full-line comments,
fixed means indent that text at `fortran-comment-line-extra-indent' beyond
the value of `fortran-minimum-statement-indent-fixed' (for fixed
relative means indent at `fortran-comment-line-extra-indent' beyond the
indentation for a line of code.
(default 'fixed)
- fortran-comment-indent-char
+ `fortran-comment-indent-char'
Single-character string to be inserted instead of space for
full-line comment indentation. (default \" \")
- fortran-minimum-statement-indent-fixed
- Minimum indentation for Fortran statements in fixed format mode. (def.6)
- fortran-minimum-statement-indent-tab
- Minimum indentation for Fortran statements in TAB format mode. (default 9)
- fortran-line-number-indent
+ `fortran-minimum-statement-indent-fixed'
+ Minimum indentation for Fortran statements in fixed format mode. (def.6)
+ `fortran-minimum-statement-indent-tab'
+ Minimum indentation for Fortran statements in TAB format mode. (default 9)
+ `fortran-line-number-indent'
Maximum indentation for line numbers. A line number will get
less than this much indentation if necessary to avoid reaching
column 5. (default 1)
- fortran-check-all-num-for-matching-do
+ `fortran-check-all-num-for-matching-do'
Non-nil causes all numbered lines to be treated as possible \"continue\"
statements. (default nil)
- fortran-blink-matching-if
+ `fortran-blink-matching-if'
Non-nil causes \\[fortran-indent-line] on an ENDIF statement to blink on
matching IF. Also, from an ENDDO statement, blink on matching DO [WHILE]
statement. (default nil)
- fortran-continuation-string
+ `fortran-continuation-string'
Single-character string to be inserted in column 5 of a continuation
line. (default \"$\")
- fortran-comment-region
- String inserted by \\[fortran-comment-region] at start of each line in
+ `fortran-comment-region'
+ String inserted by \\[fortran-comment-region] at start of each line in
region. (default \"c$$$\")
- fortran-electric-line-number
- Non-nil causes line number digits to be moved to the correct column
+ `fortran-electric-line-number'
+ Non-nil causes line number digits to be moved to the correct column
as typed. (default t)
- fortran-break-before-delimiters
- Non-nil causes `fortran-fill' breaks lines before delimiters.
+ `fortran-break-before-delimiters'
+ Non-nil causes `fortran-fill' to break lines before delimiters.
(default t)
- fortran-startup-message
- Set to nil to inhibit message first time Fortran mode is used.
Turning on Fortran mode calls the value of the variable `fortran-mode-hook'
with no args, if that value is non-nil."
(interactive)
(kill-all-local-variables)
- (if fortran-startup-message
- (message "Emacs Fortran mode %s. Bugs to %s"
- fortran-mode-version bug-fortran-mode))
- (setq fortran-startup-message nil)
(setq local-abbrev-table fortran-mode-abbrev-table)
(set-syntax-table fortran-mode-syntax-table)
;; Font Lock mode support.
- (set (make-local-variable 'font-lock-defaults)
- '((fortran-font-lock-keywords fortran-font-lock-keywords-1
- fortran-font-lock-keywords-2 fortran-font-lock-keywords-3) t t))
+ (make-local-variable 'font-lock-defaults)
+ (setq font-lock-defaults '((fortran-font-lock-keywords
+ fortran-font-lock-keywords-1
+ fortran-font-lock-keywords-2
+ fortran-font-lock-keywords-3)
+ nil t ((?/ . "$/") ("_$" . "w"))
+ beginning-of-fortran-subprogram))
+ (set (make-local-variable 'font-lock-syntactic-keywords)
+ fortran-font-lock-syntactic-keywords)
(make-local-variable 'fortran-break-before-delimiters)
(setq fortran-break-before-delimiters t)
(make-local-variable 'indent-line-function)
(make-local-variable 'indent-tabs-mode)
(setq indent-tabs-mode nil)
;;;(setq abbrev-mode t) ; ?? (abbrev-mode 1) instead??
- (setq fill-column 72) ; Already local?
+ (set (make-local-variable 'fill-column) 72)
(use-local-map fortran-mode-map)
(setq mode-name "Fortran")
(setq major-mode 'fortran-mode)
-;;;(make-local-variable 'fortran-tab-mode)
(make-local-variable 'fortran-comment-line-extra-indent)
(make-local-variable 'fortran-minimum-statement-indent-fixed)
(make-local-variable 'fortran-minimum-statement-indent-tab)
(make-local-variable 'fortran-column-ruler-fixed)
(make-local-variable 'fortran-column-ruler-tab)
- (make-local-variable 'fortran-tab-mode-string)
(setq fortran-tab-mode-string " TAB-format")
(setq indent-tabs-mode (fortran-analyze-file-format))
+ (setq imenu-case-fold-search t)
+ (make-local-variable 'imenu-generic-expression)
+ (setq imenu-generic-expression fortran-imenu-generic-expression)
+ (setq imenu-syntax-alist '(("_$" . "w")))
+ (set (make-local-variable 'fill-paragraph-function) 'fortran-fill-paragraph)
+ (set (make-local-variable 'indent-line-function) 'fortran-indent-line)
+ (set (make-local-variable 'indent-region-function)
+ (lambda (start end)
+ (let (fortran-blink-matching-if ; avoid blinking delay
+ indent-region-function)
+ (indent-region start end nil))))
(run-hooks 'fortran-mode-hook))
\f
(defun fortran-comment-hook ()
"Align or create comment on current line.
Existing comments of all types are recognized and aligned.
If the line has no comment, a side-by-side comment is inserted and aligned
-if the value of comment-start is not nil.
+if the value of `comment-start' is not nil.
Otherwise, a separate-line comment is inserted, on this line
or on a new line inserted before this line if this line is not blank."
(interactive)
(insert-char (if (stringp fortran-comment-indent-char)
(aref fortran-comment-indent-char 0)
fortran-comment-indent-char)
- (- (calculate-fortran-indent) (current-column))))))
+ (- (fortran-calculate-indent) (current-column))))))
(defun fortran-comment-region (beg-region end-region arg)
"Comments every line in the region.
-Puts fortran-comment-region at the beginning of every line in the region.
-BEG-REGION and END-REGION are args which specify the region boundaries.
+Puts `fortran-comment-region' at the beginning of every line in the region.
+BEG-REGION and END-REGION are args which specify the region boundaries.
With non-nil ARG, uncomments the region."
(interactive "*r\nP")
(let ((end-region-mark (make-marker)) (save-point (point-marker)))
(set-marker save-point nil)))
\f
(defun fortran-abbrev-start ()
- "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
+ "Typing ;\\[help-command] or ;? lists all the Fortran abbrevs.
Any other key combination is executed normally."
(interactive)
(let (c)
(get-buffer-create "*Abbrevs*"))
(defun fortran-column-ruler ()
- "Inserts a column ruler momentarily above current line, till next keystroke.
+ "Insert a column ruler momentarily above current line, till next keystroke.
The ruler is defined by the value of `fortran-column-ruler-fixed' when in fixed
format mode, and `fortran-column-ruler-tab' when in TAB format mode.
The key typed is executed unless it is SPC."
(interactive)
- (momentary-string-display
+ (momentary-string-display
(if indent-tabs-mode
fortran-column-ruler-tab
fortran-column-ruler-fixed)
(save-excursion
- (beginning-of-line)
+ (beginning-of-line)
(if (eq (window-start (selected-window))
(window-point (selected-window)))
(progn (forward-line) (point))
nil "Type SPC or any command to erase ruler."))
(defun fortran-window-create ()
- "Makes the window 72 columns wide.
+ "Make the window 72 columns wide.
See also `fortran-window-create-momentarily'."
(interactive)
(condition-case error
(if (< (window-width) (frame-width))
(enlarge-window-horizontally (- (frame-width)
(window-width) 1)))
- (split-window-horizontally 73)
+ (let* ((window-edges (window-edges))
+ (scroll-bar-width (- (nth 2 window-edges)
+ (car window-edges)
+ (window-width))))
+ (split-window-horizontally (+ 72 scroll-bar-width)))
(other-window 1)
(switch-to-buffer " fortran-window-extra" t)
(select-window (previous-window))))
'error)))
(defun fortran-window-create-momentarily (&optional arg)
- "Momentarily makes the window 72 columns wide.
+ "Momentarily make the window 72 columns wide.
Optional ARG non-nil and non-unity disables the momentary feature.
See also `fortran-window-create'."
(interactive "p")
(if (save-excursion (beginning-of-line) (looking-at comment-line-start-skip))
(insert "\n" comment-line-start " ")
(if indent-tabs-mode
- (progn
- (insert "\n\t")
- (insert-char (fortran-numerical-continuation-char) 1))
- (insert "\n " fortran-continuation-string)));Space after \n important
- (fortran-indent-line)) ;when the cont string is C, c or *.
+ (insert "\n\t" (fortran-numerical-continuation-char))
+ (insert "\n " fortran-continuation-string))) ; Space after \n important
+ (fortran-indent-line)) ; when the cont string is C, c or *.
+
+(defun fortran-remove-continuation ()
+ (if (looking-at "\\( [^ 0\n]\\|\t[1-9]\\|&\\)")
+ (progn (replace-match "")
+ (delete-indentation)
+ t)))
+
+(defun fortran-join-line (arg)
+ "Join current line to the previous one and re-indent.
+With a prefix argument, repeat this operation that many times.
+If the prefix argument ARG is negative, join the next -ARG lines.
+Continuation lines are correctly handled."
+ (interactive "*p")
+ (save-excursion
+ (when (> 0 arg)
+ (setq arg (- arg))
+ (forward-line arg))
+ (while (not (zerop arg))
+ (beginning-of-line)
+ (or (fortran-remove-continuation)
+ (delete-indentation))
+ (setq arg (1- arg)))
+ (fortran-indent-line)))
(defun fortran-numerical-continuation-char ()
"Return a digit for tab-digit style of continuation lines.
(skip-chars-backward chars)
(delete-region (point) (progn (skip-chars-forward chars) (point))))
+(put 'fortran-electric-line-number 'delete-selection t)
(defun fortran-electric-line-number (arg)
"Self insert, but if part of a Fortran line number indent it automatically.
-Auto-indent does not happen if a numeric arg is used."
+Auto-indent does not happen if a numeric ARG is used."
(interactive "P")
(if (or arg (not fortran-electric-line-number))
- (if arg
+ (if arg
(self-insert-command (prefix-numeric-value arg))
(self-insert-command 1))
(if (or (and (= 5 (current-column))
(beginning-of-line)
(looking-at " ")));In col 5 with only spaces to left.
(and (= (if indent-tabs-mode
- fortran-minimum-statement-indent-tab
- fortran-minimum-statement-indent-fixed) (current-column))
+ fortran-minimum-statement-indent-tab
+ fortran-minimum-statement-indent-fixed) (current-column))
(save-excursion
(beginning-of-line)
(looking-at "\t"));In col 8 with a single tab to the left.
(save-excursion
(beginning-of-line)
(point))
- t)) ;not a line number
- (looking-at "[0-9]") ;within a line number
- )
+ t)) ;not a line number
+ (looking-at "[0-9]")) ;within a line number
(self-insert-command (prefix-numeric-value arg))
(skip-chars-backward " \t")
(insert last-command-char)
(fortran-indent-line))))
\f
+(defvar fortran-end-prog-re1
+ "end\
+\\([ \t]*\\(program\\|subroutine\\|function\\|block[ \t]*data\\)\\>\
+\\([ \t]*\\(\\sw\\|\\s_\\)+\\)?\\)?")
+(defvar fortran-end-prog-re
+ (concat "^[ \t0-9]*" fortran-end-prog-re1)
+ "Regexp possibly marking subprogram end.")
+
+(defun fortran-check-end-prog-re ()
+ "Check a preliminary match against `fortran-end-prog-re'."
+ ;; Having got a possible match for the subprogram end, we need a
+ ;; match of whitespace, avoiding possible column 73+ stuff.
+ (save-match-data
+ (string-match "^\\s-*\\(\\'\\|\\s<\\)"
+ (buffer-substring (match-end 0)
+ (min (line-end-position)
+ (+ 72 (line-beginning-position)))))))
+
+;; Note that you can't just check backwards for `subroutine' &c in
+;; case of un-marked main programs not at the start of the file.
(defun beginning-of-fortran-subprogram ()
"Moves point to the beginning of the current Fortran subprogram."
(interactive)
- (let ((case-fold-search t))
- (beginning-of-line -1)
- (re-search-backward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
- (if (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")
- (forward-line 1))))
+ (save-match-data
+ (let ((case-fold-search t))
+ (beginning-of-line -1)
+ (if (catch 'ok
+ (while (re-search-backward fortran-end-prog-re nil 'move)
+ (if (fortran-check-end-prog-re)
+ (throw 'ok t))))
+ (forward-line)))))
(defun end-of-fortran-subprogram ()
"Moves point to the end of the current Fortran subprogram."
(interactive)
- (let ((case-fold-search t))
- (beginning-of-line 2)
- (re-search-forward "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]" nil 'move)
- (goto-char (match-beginning 0))
- (forward-line 1)))
+ (save-match-data
+ (let ((case-fold-search t))
+ (if (save-excursion ; on END
+ (beginning-of-line)
+ (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re)))
+ (forward-line)
+ (beginning-of-line 2)
+ (catch 'ok
+ (while (re-search-forward fortran-end-prog-re nil 'move)
+ (if (fortran-check-end-prog-re)
+ (throw 'ok t))))
+ (goto-char (match-beginning 0))
+ (forward-line)))))
(defun mark-fortran-subprogram ()
- "Put mark at end of Fortran subprogram, point at beginning.
+ "Put mark at end of Fortran subprogram, point at beginning.
The marks are pushed."
(interactive)
(end-of-fortran-subprogram)
- (push-mark (point))
+ (push-mark (point) nil t)
(beginning-of-fortran-subprogram))
(defun fortran-previous-statement ()
(cond ((and continue-test
(not not-first-statement))
(message "Incomplete continuation statement."))
- (continue-test
+ (continue-test
(fortran-previous-statement))
((not not-first-statement)
'first-statement))))
(looking-at (concat "[ \t]*" comment-start-skip)))))
(if (not not-last-statement)
'last-statement)))
+
+(defun fortran-narrow-to-subprogram ()
+ "Make text outside the current subprogram invisible.
+The subprogram visible is the one that contains or follows point."
+ (interactive)
+ (save-excursion
+ (mark-fortran-subprogram)
+ (narrow-to-region (point) (mark))))
+
+(defmacro fortran-with-subprogram-narrowing (&rest forms)
+ "Execute FORMS with buffer temporarily narrowed to current subprogram.
+Doesn't push a mark."
+ `(save-restriction
+ (save-excursion
+ (narrow-to-region (progn
+ (beginning-of-fortran-subprogram)
+ (point))
+ (progn
+ (end-of-fortran-subprogram)
+ (point))))
+ ,@forms))
\f
(defun fortran-blink-matching-if ()
- ;; From a Fortran ENDIF statement, blink the matching IF statement.
- (let ((top-of-window (window-start)) matching-if
- (endif-point (point)) message)
+ "From an ENDIF statement, blink the matching IF statement."
+ (let ((top-of-window (window-start))
+ (endif-point (point))
+ (case-fold-search t)
+ matching-if
+ message)
(if (save-excursion (beginning-of-line)
(skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*if\\b"))
+ (looking-at "e\\(nd[ \t]*if\\|lse\\([ \t]*if\\)?\\)\\b"))
(progn
(if (not (setq matching-if (fortran-beginning-if)))
(setq message "No matching if.")
(goto-char endif-point))))))
(defun fortran-blink-matching-do ()
- ;; From a Fortran ENDDO statement, blink on the matching DO or DO WHILE
- ;; statement. This is basically copied from fortran-blink-matching-if.
- (let ((top-of-window (window-start)) matching-do
- (enddo-point (point)) message)
+ "From an ENDDO statement, blink the matching DO or DO WHILE statement."
+ ;; This is basically copied from fortran-blink-matching-if.
+ (let ((top-of-window (window-start))
+ (enddo-point (point))
+ (case-fold-search t)
+ matching-do
+ message)
(if (save-excursion (beginning-of-line)
(skip-chars-forward " \t0-9")
(looking-at "end[ \t]*do\\b"))
(goto-char enddo-point))))))
(defun fortran-mark-do ()
- "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
+ "Put mark at end of Fortran DO [WHILE]-ENDDO construct, point at beginning.
The marks are pushed."
(interactive)
(let (enddo-point do-point)
(goto-char do-point)))))
(defun fortran-end-do ()
- ;; Search forward for first unmatched ENDDO. Return point or nil.
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*do\\b"))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one.
- (save-excursion
- (let ((count 1))
+ "Search forward for first unmatched ENDDO.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*do\\b"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
(while (and (not (= count 0))
- (not (eq (fortran-next-statement) 'last-statement))
- ;; Keep local to subprogram
- (not (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
-
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*do\\b")
- (setq count (- count 1)))
- ((looking-at "do[ \t]+[^0-9]")
+ (not (eq (fortran-next-statement) 'last-statement))
+ ;; Keep local to subprogram
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "end[ \t]*do\\b")
+ (setq count (1- count)))
+ ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
(setq count (+ count 1)))))
(and (= count 0)
- ;; All pairs accounted for.
- (point))))))
+ ;; All pairs accounted for.
+ (point)))))))
(defun fortran-beginning-do ()
- ;; Search backwards for first unmatched DO [WHILE]. Return point or nil.
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "do[ \t]+"))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one.
- (save-excursion
- (let ((count 1))
+ "Search backwards for first unmatched DO [WHILE].
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
(while (and (not (= count 0))
- (not (eq (fortran-previous-statement) 'first-statement))
- ;; Keep local to subprogram
- (not (looking-at "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
+ (not (eq (fortran-previous-statement) 'first-statement))
+ ;; Keep local to subprogram
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "do[ \t]+[^0-9]")
- (setq count (- count 1)))
- ((looking-at "end[ \t]*do\\b")
- (setq count (+ count 1)))))
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?do[ \t]+[^0-9]")
+ (setq count (1- count)))
+ ((looking-at "end[ \t]*do\\b")
+ (setq count (1+ count)))))
(and (= count 0)
- ;; All pairs accounted for.
- (point))))))
+ ;; All pairs accounted for.
+ (point)))))))
(defun fortran-mark-if ()
"Put mark at end of Fortran IF-ENDIF construct, point at beginning.
(push-mark)
(goto-char if-point)))))
+(defvar fortran-if-start-re "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
+
(defun fortran-end-if ()
- ;; Search forwards for first unmatched ENDIF. Return point or nil.
- (if (save-excursion (beginning-of-line)
- (skip-chars-forward " \t0-9")
- (looking-at "end[ \t]*if\\b"))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one. The point has been already been moved to first
- ;; letter on line but this should not cause troubles.
- (save-excursion
- (let ((count 1))
+ "Search forwards for first unmatched ENDIF.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion (beginning-of-line)
+ (skip-chars-forward " \t0-9")
+ (looking-at "end[ \t]*if\\b"))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one. The point has been already been moved to first
+ ;; letter on line but this should not cause troubles.
+ (save-excursion
+ (let ((count 1))
(while (and (not (= count 0))
- (not (eq (fortran-next-statement) 'last-statement))
- ;; Keep local to subprogram.
- (not (looking-at
- "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
+ (not (eq (fortran-next-statement) 'last-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*if\\b")
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at "end[ \t]*if\\b")
(setq count (- count 1)))
- ((looking-at "if[ \t]*(")
- (save-excursion
- (if (or
- (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
- (let (then-test) ; Multi-line if-then.
- (while
+ ((looking-at fortran-if-start-re)
+ (save-excursion
+ (if (or
+ (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ (let (then-test) ; Multi-line if-then.
+ (while
(and (= (forward-line 1) 0)
- ;; Search forward for then.
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test))
+ ;; Search forward for then.
+ (or (looking-at " [^ 0\n]")
+ (looking-at "\t[1-9]"))
+ (not
+ (setq then-test
+ (looking-at
+ ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
+ then-test))
(setq count (+ count 1)))))))
(and (= count 0)
- ;; All pairs accounted for.
- (point))))))
+ ;; All pairs accounted for.
+ (point)))))))
(defun fortran-beginning-if ()
- ;; Search backwards for first unmatched IF-THEN. Return point or nil.
- (if (save-excursion
- ;; May be sitting on multi-line if-then statement, first move to
- ;; beginning of current statement. Note: `fortran-previous-statement'
- ;; moves to previous statement *unless* current statement is first
- ;; one. Only move forward if not first-statement.
- (if (not (eq (fortran-previous-statement) 'first-statement))
- (fortran-next-statement))
- (skip-chars-forward " \t0-9")
- (and
- (looking-at "if[ \t]*(")
- (save-match-data
- (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
- ;; Multi-line if-then.
- (let (then-test)
- (while
+ "Search backwards for first unmatched IF-THEN.
+Return point or nil."
+ (let ((case-fold-search t))
+ (if (save-excursion
+ ;; May be sitting on multi-line if-then statement, first move to
+ ;; beginning of current statement. Note: `fortran-previous-statement'
+ ;; moves to previous statement *unless* current statement is first
+ ;; one. Only move forward if not first-statement.
+ (if (not (eq (fortran-previous-statement) 'first-statement))
+ (fortran-next-statement))
+ (skip-chars-forward " \t0-9")
+ (and
+ (looking-at fortran-if-start-re)
+ (save-match-data
+ (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ ;; Multi-line if-then.
+ (let (then-test)
+ (while
(and (= (forward-line 1) 0)
- ;; Search forward for then.
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test)))))
- ;; Sitting on one.
- (match-beginning 0)
- ;; Search for one.
- (save-excursion
- (let ((count 1))
+ ;; Search forward for then.
+ (or (looking-at " [^ 0\n]")
+ (looking-at "\t[1-9]"))
+ (not
+ (setq then-test
+ (looking-at
+ ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
+ then-test)))))
+ ;; Sitting on one.
+ (match-beginning 0)
+ ;; Search for one.
+ (save-excursion
+ (let ((count 1))
(while (and (not (= count 0))
- (not (eq (fortran-previous-statement) 'first-statement))
- ;; Keep local to subprogram.
- (not (looking-at
- "^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]")))
-
- (skip-chars-forward " \t0-9")
- (cond ((looking-at "if[ \t]*(")
- (save-excursion
- (if (or
- (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
- (let (then-test) ; Multi-line if-then.
- (while
+ (not (eq (fortran-previous-statement) 'first-statement))
+ ;; Keep local to subprogram.
+ (not (and (looking-at fortran-end-prog-re)
+ (fortran-check-end-prog-re))))
+
+ (skip-chars-forward " \t0-9")
+ (cond ((looking-at fortran-if-start-re)
+ (save-excursion
+ (if (or
+ (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t(=a-z0-9]")
+ (let (then-test) ; Multi-line if-then.
+ (while
(and (= (forward-line 1) 0)
- ;; Search forward for then.
- (or (looking-at " [^ 0\n]")
- (looking-at "\t[1-9]"))
- (not
- (setq then-test
- (looking-at
- ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
- then-test))
+ ;; Search forward for then.
+ (or (looking-at " [^ 0\n]")
+ (looking-at "\t[1-9]"))
+ (not
+ (setq then-test
+ (looking-at
+ ".*then\\b[ \t]*[^ \t(=a-z0-9]")))))
+ then-test))
(setq count (- count 1)))))
- ((looking-at "end[ \t]*if\\b")
+ ((looking-at "end[ \t]*if\\b")
(setq count (+ count 1)))))
(and (= count 0)
- ;; All pairs accounted for.
- (point))))))
+ ;; All pairs accounted for.
+ (point)))))))
\f
(defun fortran-indent-line ()
- "Indents current Fortran line based on its contents and on previous lines."
+ "Indent current Fortran line based on its contents and on previous lines."
(interactive)
- (let ((cfi (calculate-fortran-indent)))
+ (let ((cfi (fortran-calculate-indent)))
(save-excursion
(beginning-of-line)
(if (or (not (= cfi (fortran-current-line-indentation)))
(end-of-line)
(fortran-fill)))
(if fortran-blink-matching-if
- (progn
+ (progn
(fortran-blink-matching-if)
(fortran-blink-matching-do)))))
(defun fortran-indent-new-line ()
"Reindent the current Fortran line, insert a newline and indent the newline.
-An abbrev before point is expanded if `abbrev-mode' is non-nil."
+An abbrev before point is expanded if variable `abbrev-mode' is non-nil."
(interactive)
(if abbrev-mode (expand-abbrev))
(save-excursion
(beginning-of-line)
(skip-chars-forward " \t")
- (if (or (looking-at "[0-9]") ;Reindent only where it is most
- (looking-at "end") ;likely to be necessary
- (looking-at "else")
- (looking-at (regexp-quote fortran-continuation-string)))
- (fortran-indent-line)))
+ (let ((case-fold-search t))
+ (if (or (looking-at "[0-9]") ;Reindent only where it is most
+ (looking-at "end") ;likely to be necessary
+ (looking-at "else")
+ (looking-at (regexp-quote fortran-continuation-string)))
+ (fortran-indent-line))))
(newline)
(fortran-indent-line))
(defun fortran-indent-subprogram ()
- "Properly indents the Fortran subprogram which contains point."
+ "Properly indent the Fortran subprogram which contains point."
(interactive)
(save-excursion
(mark-fortran-subprogram)
(indent-region (point) (mark) nil))
(message "Indenting subprogram...done."))
-(defun calculate-fortran-indent ()
+(defun fortran-calculate-indent ()
"Calculates the Fortran indent column based on previous lines."
(let (icol first-statement (case-fold-search t)
(fortran-minimum-statement-indent
(setq icol fortran-minimum-statement-indent)
(setq icol (fortran-current-line-indentation)))
(skip-chars-forward " \t0-9")
- (cond ((looking-at "if[ \t]*(")
+ (cond ((looking-at "\\(\\(\\sw\\|\\s_\\)+:[ \t]*\\)?if[ \t]*(")
(if (or (looking-at ".*)[ \t]*then\\b[ \t]*[^ \t_$(=a-z0-9]")
(let (then-test) ;multi-line if-then
(while (and (= (forward-line 1) 0)
*[^ \t_$(=a-z0-9]")))))
then-test))
(setq icol (+ icol fortran-if-indent))))
- ((looking-at "\\(else\\|elseif\\)\\b")
+ ((looking-at "else\\(if\\)?\\b")
(setq icol (+ icol fortran-if-indent)))
- ((looking-at "select[ \t]*case[ \t](.*)\\b")
+ ((looking-at "select[ \t]*case[ \t](.*)")
(setq icol (+ icol fortran-if-indent)))
- ((looking-at "case[ \t]*(.*)[ \t]*\n")
+ ((looking-at "case[ \t]*(.*)")
(setq icol (+ icol fortran-if-indent)))
((looking-at "case[ \t]*default\\b")
(setq icol (+ icol fortran-if-indent)))
((looking-at
"\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
(setq icol (+ icol fortran-structure-indent)))
- ((looking-at "end\\b[ \t]*[^ \t=(a-z]")
+ ((and (looking-at fortran-end-prog-re1)
+ (fortran-check-end-prog-re))
;; Previous END resets indent to minimum
(setq icol fortran-minimum-statement-indent))))))
(save-excursion
(setq icol (- icol fortran-do-indent)))
(t
(skip-chars-forward " \t0-9")
- (cond ((looking-at "end[ \t]*if\\b")
+ (cond ((looking-at "end[ \t]*\\(if\\|select\\|where\\)\\b")
(setq icol (- icol fortran-if-indent)))
- ((looking-at "\\(else\\|elseif\\)\\b")
+ ((looking-at "else\\(if\\)?\\b")
(setq icol (- icol fortran-if-indent)))
- ((looking-at "case[ \t]*(.*)[ \t]*\n")
- (setq icol (- icol fortran-if-indent)))
- ((looking-at "case[ \t]*default\\b")
+ ((looking-at "case[ \t]*\\((.*)\\|default\\>\\)")
(setq icol (- icol fortran-if-indent)))
((looking-at "\\(otherwise\\|else[ \t]*where\\)\\b")
(setq icol (- icol fortran-if-indent)))
- ((looking-at "end[ \t]*where\\b")
- (setq icol (- icol fortran-if-indent)))
((and (looking-at "continue\\b")
(fortran-check-for-matching-do))
(setq icol (- icol fortran-do-indent)))
((looking-at "end[ \t]*do\\b")
(setq icol (- icol fortran-do-indent)))
- ((looking-at
- "end[ \t]*\
+ ((looking-at "end[ \t]*\
\\(structure\\|union\\|map\\|interface\\)\\b[ \t]*[^ \t=(a-z]")
(setq icol (- icol fortran-structure-indent)))
- ((looking-at
- "end[ \t]*select\\b[ \t]*[^ \t=(a-z]")
- (setq icol (- icol fortran-if-indent)))
- ((and (looking-at "end\\b[ \t]*[^ \t=(a-z]")
+ ((and (looking-at fortran-end-prog-re1)
+ (fortran-check-end-prog-re)
(not (= icol fortran-minimum-statement-indent)))
(message "Warning: `end' not in column %d. Probably\
an unclosed block." fortran-minimum-statement-indent))))))
(current-column)))
(defun fortran-indent-to-column (col)
- "Indents current line with spaces to column COL.
+ "Indent current line with spaces to column COL.
notes: 1) A non-zero/non-blank character in column 5 indicates a continuation
line, and this continuation character is retained on indentation;
2) If `fortran-continuation-string' is the first non-whitespace
((looking-at (regexp-quote fortran-continuation-string))
(if indent-tabs-mode
(progn
- (indent-to
+ (indent-to
(if indent-tabs-mode
fortran-minimum-statement-indent-tab
fortran-minimum-statement-indent-fixed))
(= (current-column) 5))))))
(defun fortran-check-for-matching-do ()
- "When called from a numbered statement, returns t if matching DO is found.
-Otherwise return a nil."
+ "When called from a numbered statement, return t if matching DO is found.
+Otherwise return nil."
(let (charnum
(case-fold-search t))
(save-excursion
(progn (skip-chars-forward "0-9")
(point))))
(beginning-of-line)
- (and (re-search-backward
- (concat "\\(^[ \t0-9]*end\\b[ \t]*[^ \t=(a-z]\\)\\|"
- "\\(^[ \t0-9]*do[ \t]*0*" charnum "\\b\\)\\|"
- "\\(^[ \t]*0*" charnum "\\b\\)")
- nil t)
- (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum))))))))
+ (fortran-with-subprogram-narrowing
+ (and (re-search-backward
+ (concat "\\(^[ \t0-9]*do[ \t]*0*" charnum "\\b\\)\\|"
+ "\\(^[ \t]*0*" charnum "\\b\\)")
+ nil t)
+ (looking-at (concat "^[ \t0-9]*do[ \t]*0*" charnum)))))))))
(defun fortran-find-comment-start-skip ()
"Move to past `comment-start-skip' found on current line.
Return t if `comment-start-skip' found, nil if not."
-;;; In order to move point only if comment-start-skip is found,
-;;; this one uses a lot of save-excursions. Note that re-search-forward
-;;; moves point even if comment-start-skip is inside a string-constant.
-;;; Some code expects certain values for match-beginning and end
+ ;; In order to move point only if comment-start-skip is found, this
+ ;; one uses a lot of save-excursions. Note that re-search-forward
+ ;; moves point even if comment-start-skip is inside a string-constant.
+ ;; Some code expects certain values for match-beginning and end
(interactive)
(if (save-excursion
(re-search-forward comment-start-skip
t))
nil))
-;;;From: simon@gnu (Simon Marshall)
-;;; Find the next ! not in a string.
-(defun fortran-match-!-comment (limit)
- (let (found)
- (while (and (setq found (search-forward "!" limit t))
- (fortran-is-in-string-p (point))))
- (if (not found)
- nil
- ;; Cheaper than `looking-at' "!.*".
- (store-match-data
- (list (1- (point)) (progn (end-of-line) (min (point) limit))))
- t)))
-
-;; The above function is about 10% faster than the below...
-;;(defun fortran-match-!-comment (limit)
-;; (let (found)
-;; (while (and (setq found (re-search-forward "!.*" limit t))
-;; (fortran-is-in-string-p (match-beginning 0))))
-;; found))
-
-;;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
-;;; Test if TAB format continuation lines work.
+;;From: ralf@up3aud1.gwdg.de (Ralf Fassel)
+;; Test if TAB format continuation lines work.
(defun fortran-is-in-string-p (where)
- "Return non-nil if POS (a buffer position) is inside a Fortran string,
-nil else."
+ "Return non-nil iff WHERE (a buffer position) is inside a Fortran string."
(save-excursion
(goto-char where)
(cond
((bolp) nil) ; bol is never inside a string
((save-excursion ; comment lines too
- (beginning-of-line)(looking-at comment-line-start-skip)) nil)
+ (beginning-of-line)
+ (looking-at comment-line-start-skip)) nil)
(t (let (;; ok, serious now. Init some local vars:
(parse-state '(0 nil nil nil nil nil 0))
(quoted-comment-start (if comment-start
comment-start
(equal comment-start
(char-to-string (preceding-char)))))
- ;; get around a bug in forward-line in versions <= 18.57
- (if (or (> (forward-line 1) 0) (eobp))
+ (if (> (forward-line) 0)
(setq not-done nil))
;; else:
;; if we are at beginning of code line, skip any
(if (if (null arg)
(not auto-fill-function)
(> (prefix-numeric-value arg) 0))
- 'fortran-do-auto-fill
+ #'fortran-do-auto-fill
nil))
(force-mode-line-update)))
(defun fortran-fill ()
(interactive)
- (let* ((opoint (point))
+ (let* ((auto-fill-function #'fortran-do-auto-fill)
+ (opoint (point))
(bol (save-excursion (beginning-of-line) (point)))
(eol (save-excursion (end-of-line) (point)))
(bos (min eol (+ bol (fortran-current-line-indentation))))
(if (looking-at comment-line-start-skip)
nil ; OK to break quotes on comment lines.
(move-to-column fill-column)
- (cond ((fortran-is-in-string-p (point))
- (save-excursion (re-search-backward "[^']'[^']" bol t)
- (if fortran-break-before-delimiters
- (point)
- (1+ (point)))))
- (t nil)))))
- ;;
+ (if (fortran-is-in-string-p (point))
+ (save-excursion (re-search-backward "\\S\"\\s\"\\S\"" bol t)
+ (if fortran-break-before-delimiters
+ (point)
+ (1+ (point))))))))
;; decide where to split the line. If a position for a quoted
;; string was found above then use that, else break the line
;; before the last delimiter.
;; Delimiters are whitespace, commas, and operators.
;; Will break before a pair of *'s.
- ;;
(fill-point
(or quote
(save-excursion
(if (<= (point) (1+ bos))
(progn
(move-to-column (1+ fill-column))
-;;;what is this doing???
+ ;;what is this doing???
(if (not (re-search-forward "[\t\n,'+-/*)=]" eol t))
(goto-char bol))))
(if (bolp)
(re-search-forward "[ \t]" opoint t)
- (forward-char -1)
- (if (looking-at "'")
- (forward-char 1)
+ (backward-char)
+ (if (looking-at "\\s\"")
+ (forward-char)
(skip-chars-backward " \t\*")))
(if fortran-break-before-delimiters
(point)
- (1+ (point))))))
- )
+ (1+ (point)))))))
;; if we are in an in-line comment, don't break unless the
;; line of code is longer than it should be. Otherwise
;; break the line at the column computed above.
(fortran-break-line))
(save-excursion
(if (> (save-excursion
- (goto-char fill-point)
+ (goto-char fill-point)
(current-column))
- (+ (calculate-fortran-indent) fortran-continuation-indent))
+ (+ (fortran-calculate-indent) fortran-continuation-indent))
(progn
(goto-char fill-point)
(fortran-break-line))))))
(bol (save-excursion (beginning-of-line) (point)))
(eol (save-excursion (end-of-line) (point)))
(comment-string nil))
-
+
(save-excursion
(if (and comment-start-skip (fortran-find-comment-start-skip))
(progn
(re-search-backward comment-start-skip bol t)
(setq comment-string (buffer-substring (point) eol))
(delete-region (point) eol))))
-;;; Forward line 1 really needs to go to next non white line
- (if (save-excursion (forward-line 1)
+ ;; Forward line 1 really needs to go to next non white line
+ (if (save-excursion (forward-line)
(or (looking-at " [^ 0\n]")
(looking-at "\t[1-9]")))
(progn
(insert comment-string)))))
(defun fortran-analyze-file-format ()
- "Returns nil if fixed format is used, t if TAB formatting is used.
+ "Return nil if fixed format is used, t if TAB formatting is used.
Use `fortran-tab-mode-default' if no non-comment statements are found in the
file before the end or the first `fortran-analyze-depth' lines."
(let ((i 0))
(indent-tabs-mode fortran-tab-mode-string))
minor-mode-alist)))
+(defun fortran-fill-paragraph (&optional justify)
+ "Fill surrounding comment block as paragraphs, else fill statement.
+
+Intended as the value of `fill-paragraph-function'."
+ (interactive "P")
+ (save-excursion
+ (beginning-of-line)
+ (if (not (looking-at "[Cc*]"))
+ (fortran-fill-statement)
+ ;; We're in a comment block. Find the start and end of a
+ ;; paragraph, delimited either by non-comment lines or empty
+ ;; comments. (Get positions as markers, since the
+ ;; `indent-region' below can shift the block's end).
+ (let* ((non-empty-comment (concat "\\(" comment-line-start-skip
+ "\\)" "[^ \t\n]"))
+ (start (save-excursion
+ ;; Find (start of) first line.
+ (while (and (zerop (forward-line -1))
+ (looking-at non-empty-comment)))
+ (or (looking-at non-empty-comment)
+ (forward-line)) ; overshot
+ (point-marker)))
+ (end (save-excursion
+ ;; Find start of first line past region to fill.
+ (while (progn (forward-line)
+ (looking-at non-empty-comment)))
+ (point-marker))))
+ ;; Indent the block, find the string comprising the effective
+ ;; comment start skip and use that as a fill-prefix for
+ ;; filling the region.
+ (indent-region start end nil)
+ (let ((paragraph-ignore-fill-prefix nil)
+ (fill-prefix (progn (beginning-of-line)
+ (looking-at comment-line-start-skip)
+ (match-string 0))))
+ (let (fill-paragraph-function)
+ (fill-region start end justify))) ; with normal `fill-paragraph'
+ (set-marker start nil)
+ (set-marker end nil))))
+ t)
+
+(defun fortran-fill-statement ()
+ "Fill a fortran statement up to `fill-column'."
+ (interactive)
+ (let ((auto-fill-function #'fortran-do-auto-fill))
+ (if (not (save-excursion
+ (beginning-of-line)
+ (or (looking-at "[ \t]*$")
+ (looking-at comment-line-start-skip)
+ (and comment-start-skip
+ (looking-at (concat "[ \t]*" comment-start-skip))))))
+ (save-excursion
+ ;; Find beginning of statement.
+ (fortran-next-statement)
+ (fortran-previous-statement)
+ ;; Re-indent initially.
+ (fortran-indent-line)
+ ;; Replace newline plus continuation field plus indentation with
+ ;; single space.
+ (while (progn
+ (forward-line)
+ (fortran-remove-continuation)))
+ (fortran-previous-statement)))
+ (fortran-indent-line)))
+
(provide 'fortran)
;;; fortran.el ends here
-