summaryrefslogtreecommitdiff
path: root/lisp/progmodes/cc-align.el
diff options
context:
space:
mode:
authorMartin Stjernholm <mast@lysator.liu.se>2002-04-22 00:35:36 +0000
committerMartin Stjernholm <mast@lysator.liu.se>2002-04-22 00:35:36 +0000
commita66cd3ee16d68ab874793226f0a74e08fbc81056 (patch)
treeca089daba3b962490ba70784cf684820e8b8ad83 /lisp/progmodes/cc-align.el
parent9211d0538379a887ae318bcb281e0d73ec691e24 (diff)
downloademacs-a66cd3ee16d68ab874793226f0a74e08fbc81056.tar.gz
CC Mode update to version 5.29. This is for testing; it's not a released
version.
Diffstat (limited to 'lisp/progmodes/cc-align.el')
-rw-r--r--lisp/progmodes/cc-align.el465
1 files changed, 362 insertions, 103 deletions
diff --git a/lisp/progmodes/cc-align.el b/lisp/progmodes/cc-align.el
index 58af08520ad..50e38bcefeb 100644
--- a/lisp/progmodes/cc-align.el
+++ b/lisp/progmodes/cc-align.el
@@ -25,7 +25,7 @@
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
-;; along with this program; see the file COPYING. If not, write to
+;; 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.
@@ -49,47 +49,107 @@
;; Standard indentation line-ups
+(defun c-lineup-topmost-intro-cont (langelem)
+ "Line up declaration continuation lines zero or one indentation step.
+For lines in the \"header\" of a definition, zero is used. For other
+lines, `c-basic-offset' is added to the indentation. E.g:
+
+int
+neg (int i) <- c-lineup-topmost-intro-cont
+{
+ return -i;
+}
+
+struct
+larch <- c-lineup-topmost-intro-cont
+{
+ double height;
+}
+ the_larch, <- c-lineup-topmost-intro-cont
+ another_larch; <- c-lineup-topmost-intro-cont
+<--> c-basic-offset
+
+struct larch
+the_larch, <- c-lineup-topmost-intro-cont
+ another_larch; <- c-lineup-topmost-intro-cont
+
+\(This function is mainly provided to mimic the behavior of CC Mode
+5.28 and earlier where this case wasn't handled consistently so that
+these lines could be analyzed as either topmost-intro-cont or
+statement-cont.)
+
+Works with: topmost-intro-cont."
+ (save-excursion
+ (beginning-of-line)
+ (c-backward-syntactic-ws (cdr langelem))
+ (if (memq (char-before) '(?} ?,))
+ c-basic-offset)))
+
(defun c-lineup-arglist (langelem)
"Line up the current argument line under the first argument.
-Works with: arglist-cont-nonempty."
+Works with: arglist-cont-nonempty, arglist-close."
(save-excursion
- (let* ((containing-sexp
- (save-excursion
- ;; arglist-cont-nonempty gives relpos ==
- ;; to boi of containing-sexp paren. This
- ;; is good when offset is +, but bad
- ;; when it is c-lineup-arglist, so we
- ;; have to special case a kludge here.
- (if (memq (car langelem) '(arglist-intro arglist-cont-nonempty))
- (progn
- (beginning-of-line)
- (backward-up-list 1)
- (skip-chars-forward " \t" (c-point 'eol)))
- (goto-char (cdr langelem)))
- (point)))
- (langelem-col (c-langelem-col langelem t)))
- (if (save-excursion
- (beginning-of-line)
- (looking-at "[ \t]*)"))
- (progn (goto-char (match-end 0))
- (c-forward-sexp -1)
- (forward-char 1)
- (c-forward-syntactic-ws)
- (- (current-column) langelem-col))
- (goto-char containing-sexp)
- (or (eolp)
- (not (memq (char-after) '(?{ ?\( ?\[)))
- (let ((eol (c-point 'eol))
- (here (progn
- (forward-char 1)
- (skip-chars-forward " \t")
- (point))))
- (c-forward-syntactic-ws)
- (if (< (point) eol)
- (goto-char here))))
- (- (current-column) langelem-col)
- ))))
+ (beginning-of-line)
+ (let ((containing-sexp (c-most-enclosing-brace (c-parse-state))))
+ (goto-char (1+ containing-sexp))
+ (let ((eol (c-point 'eol)))
+ (c-forward-syntactic-ws)
+ (when (< (point) eol)
+ (goto-char (1+ containing-sexp))
+ (skip-chars-forward " \t")))
+ (vector (current-column)))))
+
+;; Contributed by Kevin Ryde <user42@zip.com.au>.
+(defun c-lineup-argcont (elem)
+ "Line up a continued argument.
+
+foo (xyz, aaa + bbb + ccc
+ + ddd + eee + fff); <- c-lineup-argcont
+
+Only continuation lines like this are touched, `nil' is returned on lines
+which are the start of an argument.
+
+Within a gcc asm block, \":\" is recognised as an argument separator,
+but of course only between operand specifications, not in the expressions
+for the operands.
+
+Works with: arglist-cont, arglist-cont-nonempty."
+
+ (save-excursion
+ (beginning-of-line)
+ (let ((bol (point)))
+
+ ;; Previous line ending in a comma means we're the start of an
+ ;; argument. This should quickly catch most cases not for us.
+ (c-backward-syntactic-ws)
+ (let ((c (char-before)))
+ (unless (eq c ?,)
+
+ ;; In a gcc asm, ":" on the previous line means the start of an
+ ;; argument. And lines starting with ":" are not for us, don't
+ ;; want them to indent to the preceding operand.
+ (let ((gcc-asm (save-excursion
+ (goto-char bol)
+ (c-in-gcc-asm-p))))
+ (unless (and gcc-asm
+ (or (eq c ?:)
+ (save-excursion
+ (goto-char bol)
+ (looking-at "[ \t]*:"))))
+
+ (c-lineup-argcont-scan (if gcc-asm ?:))
+ (vector (current-column)))))))))
+
+(defun c-lineup-argcont-scan (&optional other-match)
+ ;; Find the start of an argument, for `c-lineup-argcont'.
+ (when (eq 0 (c-backward-token-1 1 t))
+ (let ((c (char-after)))
+ (if (or (eq c ?,) (eq c other-match))
+ (progn
+ (forward-char)
+ (c-forward-syntactic-ws))
+ (c-lineup-argcont-scan other-match)))))
(defun c-lineup-arglist-intro-after-paren (langelem)
"Line up a line just after the open paren of the surrounding paren or
@@ -98,13 +158,10 @@ brace block.
Works with: defun-block-intro, brace-list-intro,
statement-block-intro, statement-case-intro, arglist-intro."
(save-excursion
- (let ((langelem-col (c-langelem-col langelem t))
- (ce-curcol (save-excursion
- (beginning-of-line)
- (backward-up-list 1)
- (skip-chars-forward " \t" (c-point 'eol))
- (current-column))))
- (- ce-curcol langelem-col -1))))
+ (beginning-of-line)
+ (backward-up-list 1)
+ (skip-chars-forward " \t" (c-point 'eol))
+ (vector (1+ (current-column)))))
(defun c-lineup-arglist-close-under-paren (langelem)
"Line up a closing paren line under the corresponding open paren.
@@ -114,12 +171,9 @@ brace-list-close, arglist-close, extern-lang-close, namespace-close
\(for most of these, a zero offset will normally produce the same
result, though)."
(save-excursion
- (let ((langelem-col (c-langelem-col langelem t))
- (ce-curcol (save-excursion
- (beginning-of-line)
- (backward-up-list 1)
- (current-column))))
- (- ce-curcol langelem-col))))
+ (beginning-of-line)
+ (backward-up-list 1)
+ (vector (current-column))))
(defun c-lineup-close-paren (langelem)
"Line up the closing paren under its corresponding open paren if the
@@ -147,7 +201,7 @@ brace-list-close, arglist-close, extern-lang-close, namespace-close."
(c-forward-syntactic-ws (c-point 'eol))
(if (eolp)
0
- (- opencol (c-langelem-col langelem t))))
+ (vector opencol)))
(error nil))))
(defun c-lineup-streamop (langelem)
@@ -155,10 +209,10 @@ brace-list-close, arglist-close, extern-lang-close, namespace-close."
Works with: stream-op."
(save-excursion
- (let ((langelem-col (c-langelem-col langelem)))
- (re-search-forward "<<\\|>>" (c-point 'eol) 'move)
- (goto-char (match-beginning 0))
- (- (current-column) langelem-col))))
+ (goto-char (cdr langelem))
+ (re-search-forward "<<\\|>>" (c-point 'eol) 'move)
+ (goto-char (match-beginning 0))
+ (vector (current-column))))
(defun c-lineup-multi-inher (langelem)
"Line up the classes in C++ multiple inheritance clauses and member
@@ -182,8 +236,8 @@ Works with: inher-cont, member-init-cont."
(here (point))
(char-after-ip (progn
(skip-chars-forward " \t")
- (char-after)))
- (langelem-col (c-langelem-col langelem)))
+ (char-after))))
+ (if (cdr langelem) (goto-char (cdr langelem)))
;; This kludge is necessary to support both inher-cont and
;; member-init-cont, since they have different anchor positions.
@@ -199,7 +253,7 @@ Works with: inher-cont, member-init-cont."
(if (or (eolp)
(looking-at c-comment-start-regexp))
(c-forward-syntactic-ws here))
- (- (current-column) langelem-col)
+ (vector (current-column))
)))
(defun c-lineup-java-inher (langelem)
@@ -216,12 +270,12 @@ class Foo class Foo
Works with: inher-cont."
(save-excursion
- (let ((langelem-col (c-langelem-col langelem)))
- (forward-word 1)
- (if (looking-at "[ \t]*$")
- c-basic-offset
- (c-forward-syntactic-ws)
- (- (current-column) langelem-col)))))
+ (goto-char (cdr langelem))
+ (forward-word 1)
+ (if (looking-at "[ \t]*$")
+ c-basic-offset
+ (c-forward-syntactic-ws)
+ (vector (current-column)))))
(defun c-lineup-java-throws (langelem)
"Line up Java throws declarations.
@@ -246,10 +300,9 @@ Works with: func-decl-cont."
(throw 'done t))))))
(if throws
(if (zerop (c-forward-token-1 1 nil (c-point 'eol)))
- (- (current-column) (c-langelem-col langelem))
+ (vector (current-column))
(back-to-indentation)
- (+ (- (current-column) (c-langelem-col langelem))
- c-basic-offset))
+ (vector (+ (current-column) c-basic-offset)))
c-basic-offset))))
(defun c-indent-one-line-block (langelem)
@@ -332,21 +385,33 @@ Works with: The `c' syntactic symbol."
(if (looking-at c-current-comment-prefix)
(- (match-end 0) (point))
0)))
- (starterlen (save-excursion
- (goto-char (cdr langelem))
- (looking-at comment-start-skip)
- (- (save-excursion
- (goto-char (match-end 0))
- (skip-chars-backward " \t")
- (point))
- (or (match-end 1) (point))
- 1))) ; Don't count the first '/'.
- (langelem-col (save-excursion (c-langelem-col langelem))))
+ (starterlen
+ ;; Get the length of the comment starter, not including
+ ;; the first '/'. We check if the comment prefix matched
+ ;; on the current line matches the starter or if it
+ ;; matches comment-start-skip, and choose whichever is
+ ;; longest.
+ (max (save-excursion
+ (goto-char (1+ (cdr langelem)))
+ (if (and (match-string 0)
+ (looking-at (regexp-quote (match-string 0))))
+ (- (match-end 0) (match-beginning 0))
+ 0))
+ (save-excursion
+ (goto-char (cdr langelem))
+ (looking-at comment-start-skip)
+ (- (or (match-end 1)
+ (save-excursion
+ (goto-char (match-end 0))
+ (skip-chars-backward " \t")
+ (point)))
+ (point)
+ 1)))))
(if (and (> starterlen 10) (zerop prefixlen))
;; The comment has a long starter and the line doesn't have
;; a nonempty comment prefix. Treat it as free form text
;; and don't change the indentation.
- (- (current-column) langelem-col)
+ (vector (current-column))
(forward-line -1)
(back-to-indentation)
(if (>= (cdr langelem) (point))
@@ -356,11 +421,14 @@ Works with: The `c' syntactic symbol."
;; starter.
(progn
(goto-char (match-end 0))
- (if (looking-at "\\([ \t]+\\).+$")
- ;; Align with the text that hangs after the
- ;; comment starter.
- (goto-char (match-end 1)))
- (- (current-column) langelem-col))
+ ;; The following should not be necessary, since
+ ;; comment-start-skip should match everything (i.e.
+ ;; typically whitespace) that leads up to the text.
+ ;;(if (looking-at "\\([ \t]+\\).+$")
+ ;; ;; Align with the text that hangs after the
+ ;; ;; comment starter.
+ ;; (goto-char (match-end 1)))
+ (vector (current-column)))
;; How long is the comment starter? if greater than the
;; length of the comment prefix, align left. if less
;; than or equal, align right. this should also pick up
@@ -368,10 +436,9 @@ Works with: The `c' syntactic symbol."
(if (> starterlen prefixlen)
(progn
(goto-char (cdr langelem))
- (- (current-column) -1 langelem-col))
- (goto-char (match-end 0))
- (skip-chars-backward " \t")
- (- (current-column) prefixlen langelem-col)))
+ (vector (1+ (current-column))))
+ (goto-char (+ (cdr langelem) starterlen 1))
+ (vector (- (current-column) prefixlen))))
;; Not on the second line in the comment. If the previous
;; line has a nonempty comment prefix, align with it.
;; Otherwise, align with the previous nonempty line, but
@@ -389,7 +456,7 @@ Works with: The `c' syntactic symbol."
;; Align with the comment starter rather than
;; with the code before it.
(goto-char (cdr langelem)))))
- (- (current-column) langelem-col))))))
+ (vector (current-column)))))))
(defun c-lineup-comment (langelem)
"Line up a comment start according to `c-comment-only-line-offset'.
@@ -416,6 +483,30 @@ Works with: comment-intro."
-1000)) ;jam it against the left side
))))
+(defun c-lineup-knr-region-comment (langelem)
+ "Line up a comment in the \"K&R region\" with the declaration.
+That is the region between the function or class header and the
+beginning of the block. E.g:
+
+int main()
+/* This is the main function. */ <- c-lineup-knr-region-comment
+{
+ return 0;
+}
+
+Return nil if called in any other situation, to be useful in list
+expressions.
+
+Works with: comment-intro."
+ (when (or (assq 'topmost-intro-cont c-syntactic-context)
+ (assq 'func-decl-cont c-syntactic-context)
+ (assq 'knr-argdecl-intro c-syntactic-context)
+ (assq 'lambda-intro-cont c-syntactic-context))
+ (save-excursion
+ (beginning-of-line)
+ (c-beginning-of-statement-1)
+ (vector (current-column)))))
+
(defun c-lineup-runin-statements (langelem)
"Line up statements when the first statement is on the same line as
the block opening brace. E.g:
@@ -431,11 +522,11 @@ returned. This makes the function usable in list expressions.
Works with: The `statement' syntactic symbol."
(if (eq (char-after (cdr langelem)) ?{)
(save-excursion
- (let ((langelem-col (c-langelem-col langelem)))
- (forward-char 1)
- (skip-chars-forward " \t")
- (unless (eolp)
- (- (current-column) langelem-col))))))
+ (if (cdr langelem) (goto-char (cdr langelem)))
+ (forward-char 1)
+ (skip-chars-forward " \t")
+ (unless (eolp)
+ (vector (current-column))))))
(defun c-lineup-math (langelem)
"Line up the current line after the equal sign on the first line in
@@ -443,7 +534,7 @@ the statement. If there isn't any, indent with `c-basic-offset'. If
the current line contains an equal sign too, try to align it with the
first one.
-Works with: statement-cont."
+Works with: statement-cont, arglist-cont, arglist-cont-nonempty."
(save-excursion
(let ((equalp (save-excursion
(goto-char (c-point 'boi))
@@ -453,8 +544,8 @@ Works with: statement-cont."
(= (c-forward-token-1 1 t eol) 0))))
(and (eq (char-after) ?=)
(- (point) (c-point 'boi)))))
- (langelem-col (c-langelem-col langelem))
donep)
+ (if (cdr langelem) (goto-char (cdr langelem)))
(while (and (not donep)
(< (point) (c-point 'eol)))
(skip-chars-forward "^=" (c-point 'eol))
@@ -475,9 +566,39 @@ Works with: statement-cont."
(forward-char 1)
(skip-chars-forward " \t")
(setq equalp 0)))
- (- (current-column) equalp langelem-col))
+ (vector (- (current-column) equalp)))
)))
+(defun c-lineup-cascaded-calls (langelem)
+ "Line up \"cascaded calls\" under each other.
+If the line begins with \"->\" and the preceding line ends with one or
+more function calls preceded by \"->\", then the arrow is lined up with
+the first of those \"->\". E.g:
+
+result = proc->add(17)->add(18)
+ ->add(19) + <- c-lineup-cascaded-calls
+ offset; <- c-lineup-cascaded-calls (inactive)
+
+In any other situation nil is returned to allow use in list
+expressions.
+
+Works with: statement-cont, arglist-cont, arglist-cont-nonempty."
+ (save-excursion
+ (let ((bopl (c-point 'bopl)) col)
+ (back-to-indentation)
+ (when (and (looking-at "->")
+ (= (c-backward-token-1 1 t bopl) 0)
+ (eq (char-after) ?\()
+ (= (c-backward-token-1 3 t bopl) 0)
+ (looking-at "->"))
+ (setq col (current-column))
+ (while (and (= (c-backward-token-1 1 t bopl) 0)
+ (eq (char-after) ?\()
+ (= (c-backward-token-1 3 t bopl) 0)
+ (looking-at "->"))
+ (setq col (current-column)))
+ (vector col)))))
+
(defun c-lineup-template-args (langelem)
"Line up template argument lines under the first argument.
To allow this function to be used in a list expression, nil is
@@ -490,7 +611,7 @@ Works with: template-args-cont."
(backward-up-list 1)
(if (and (eq (char-after) ?<)
(zerop (c-forward-token-1 1 nil (c-point 'eol))))
- (- (current-column) (c-langelem-col langelem))))))
+ (vector (current-column))))))
(defun c-lineup-ObjC-method-call (langelem)
"Line up selector args as elisp-mode does with function args:
@@ -579,10 +700,20 @@ construct.
Works with: inlambda, inexpr-statement, inexpr-class."
(save-excursion
(back-to-indentation)
- (let ((res (or (c-looking-at-inexpr-block)
- (if (c-safe (backward-up-list 1)
- (eq (char-after) ?{))
- (c-looking-at-inexpr-block)))))
+ (let* ((paren-state (c-parse-state))
+ (containing-sexp (c-most-enclosing-brace paren-state))
+ (res (or (c-looking-at-inexpr-block
+ (c-safe-position containing-sexp paren-state)
+ containing-sexp)
+ (and containing-sexp
+ (progn (goto-char containing-sexp)
+ (eq (char-after) ?{))
+ (progn (setq containing-sexp
+ (c-most-enclosing-brace paren-state
+ (point)))
+ (c-looking-at-inexpr-block
+ (c-safe-position containing-sexp paren-state)
+ containing-sexp))))))
(when res
(goto-char (cdr res))
(- (current-column)
@@ -614,6 +745,134 @@ inextern-lang, innamespace."
0
c-basic-offset)))
+(defun c-lineup-cpp-define (langelem)
+ "Line up macro continuation lines according to the indentation of
+the construct preceding the macro. E.g:
+
+v beg of preceding constr v beg of preceding constr
+ int dribble() {
+const char msg[] = if (!running)
+ \"Some text.\"; error(\"Not running!\");
+
+#define X(A, B) \ #define X(A, B) \
+do { \ <-> do { \ <- c-lineup-cpp-define
+ printf (A, B); \ printf (A, B); \
+} while (0) } while (0)
+
+If `c-syntactic-indentation-in-macros' is non-nil, the function
+returns the relative indentation to the macro start line to allow
+accumulation with other offsets. E.g. in the following cases,
+cpp-define-intro is combined with the statement-block-intro that comes
+from the \"do {\" that hangs on the \"#define\" line:
+
+ int dribble() {
+const char msg[] = if (!running)
+ \"Some text.\"; error(\"Not running!\");
+
+#define X(A, B) do { \ #define X(A, B) do { \
+ printf (A, B); \ <-> printf (A, B); \ <- c-lineup-cpp-define
+ this->refs++; \ this->refs++; \
+} while (0) <-> } while (0) <- c-lineup-cpp-define
+
+The relative indentation returned by `c-lineup-cpp-define' is zero and
+two, respectively, in these two examples. They are then added to the
+two column indentation that statement-block-intro gives in both cases
+here.
+
+If the relative indentation is zero, then nil is returned instead.
+This useful in a list expression to specify the default indentation on
+the top level.
+
+If `c-syntactic-indentation-in-macros' is nil then this function keeps
+the current indentation, except for empty lines \(ignoring the ending
+backslash) where it takes the indentation from the closest preceding
+nonempty line in the macro. If there's no such line in the macro then
+the indentation is taken from the construct preceding it, as described
+above.
+
+Works with: cpp-define-intro."
+ (let (offset)
+ (if c-syntactic-indentation-in-macros
+ ;; Go to the macro start and do a syntactic analysis of it.
+ ;; Then remove the cpp-macro element it should contain and
+ ;; calculate the indentation it then would get.
+ (save-excursion
+ (c-beginning-of-macro)
+ (setq offset (- (c-get-syntactic-indentation
+ (delete '(cpp-macro) (c-guess-basic-syntax)))
+ (save-excursion
+ (back-to-indentation)
+ (current-column))))
+ (if (zerop offset)
+ nil
+ offset))
+ ;; Do not indent syntactically inside the macro.
+ (save-excursion
+ (let ((macro-start-line (save-excursion
+ (goto-char (c-query-macro-start))
+ (beginning-of-line)
+ (point))))
+ (beginning-of-line)
+ ;; Check every line while inside the macro.
+ (while (and (> (point) macro-start-line)
+ (looking-at "[ \t]*\\\\?$")
+ (= (forward-line -1) 0)))
+ (if (<= (point) macro-start-line)
+ ;; If we've stepped out of the macro we take the
+ ;; syntactic offset.
+ (setq offset (c-get-syntactic-indentation
+ (delete '(cpp-macro) (c-guess-basic-syntax))))
+ (setq offset (current-indentation)))
+ (if (zerop offset)
+ nil
+ (vector offset)))))))
+
+;; Contributed by Kevin Ryde <user42@zip.com.au>.
+(defun c-lineup-gcc-asm-reg (elem)
+ "Line up a gcc asm register under one on a previous line.
+
+ asm (\"foo %1, %0\\n\"
+ \"bar %0, %1\"
+ : \"=r\" (w),
+ \"=r\" (x)
+ : \"0\" (y),
+ \"1\" (z));
+
+The \"x\" line is aligned to the text after the \":\" on the \"w\" line, and
+similarly \"z\" under \"y\".
+
+This is done only in an \"asm\" or \"__asm__\" block, and only to those
+lines mentioned. Anywhere else `nil' is returned. The usual arrangement is
+to have this routine as an extra feature at the start of arglist lineups, e.g.
+
+ (c-lineup-gcc-asm-reg c-lineup-arglist)
+
+Works with: arglist-cont, arglist-cont-nonempty."
+
+ (let ((orig-pos (point))
+ alignto)
+ (save-excursion
+ (and
+ c-opt-asm-stmt-key
+
+ ;; Find the ":" to align to. Look for this first so as to quickly
+ ;; eliminate pretty much all cases which are not for us.
+ (re-search-backward "^[ \t]*:[ \t]*\\(.\\)?" (cdr elem) t)
+
+ ;; Must have something after the ":".
+ (setq alignto (match-beginning 1))
+
+ ;; Don't touch ":" lines themselves.
+ (progn (goto-char orig-pos)
+ (beginning-of-line)
+ (not (looking-at "^[ \t]*:")))
+
+ ;; Only operate in an asm statement.
+ (progn (goto-char orig-pos)
+ (c-in-gcc-asm-p))
+
+ (vector (progn (goto-char alignto) (current-column)))))))
+
(defun c-lineup-dont-change (langelem)
"Do not change the indentation of the current line.
@@ -663,7 +922,7 @@ indentation amount."
(setq syntax nil)
(back-to-indentation)
(if (zerop (current-column))
- (insert (make-string c-label-minimum-indentation 32)))
+ (insert-char ?\ c-label-minimum-indentation t))
))
))))