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987 lines
33 KiB
EmacsLisp
987 lines
33 KiB
EmacsLisp
;;; cc-align.el --- custom indentation functions for CC Mode
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;; Copyright (C) 1985,1987,1992-2001 Free Software Foundation, Inc.
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;; Authors: 2000- Martin Stjernholm
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;; 1998-1999 Barry A. Warsaw and Martin Stjernholm
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;; 1992-1997 Barry A. Warsaw
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;; 1987 Dave Detlefs and Stewart Clamen
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;; 1985 Richard M. Stallman
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;; Maintainer: bug-cc-mode@gnu.org
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;; Created: 22-Apr-1997 (split from cc-mode.el)
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;; Version: See cc-mode.el
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;; Keywords: c languages oop
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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(eval-when-compile
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(let ((load-path
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(if (and (boundp 'byte-compile-dest-file)
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(stringp byte-compile-dest-file))
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(cons (file-name-directory byte-compile-dest-file) load-path)
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load-path)))
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(require 'cc-bytecomp)))
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(cc-require 'cc-defs)
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(cc-require 'cc-vars)
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(cc-require 'cc-langs)
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(cc-require 'cc-engine)
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;; Standard indentation line-ups
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(defun c-lineup-topmost-intro-cont (langelem)
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"Line up declaration continuation lines zero or one indentation step.
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For lines in the \"header\" of a definition, zero is used. For other
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lines, `c-basic-offset' is added to the indentation. E.g:
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int
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neg (int i) <- c-lineup-topmost-intro-cont
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{
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return -i;
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}
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struct
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larch <- c-lineup-topmost-intro-cont
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{
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double height;
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}
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the_larch, <- c-lineup-topmost-intro-cont
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another_larch; <- c-lineup-topmost-intro-cont
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<--> c-basic-offset
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struct larch
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the_larch, <- c-lineup-topmost-intro-cont
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another_larch; <- c-lineup-topmost-intro-cont
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\(This function is mainly provided to mimic the behavior of CC Mode
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5.28 and earlier where this case wasn't handled consistently so that
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these lines could be analyzed as either topmost-intro-cont or
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statement-cont.)
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Works with: topmost-intro-cont."
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(save-excursion
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(beginning-of-line)
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(c-backward-syntactic-ws (cdr langelem))
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(if (memq (char-before) '(?} ?,))
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c-basic-offset)))
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(defun c-lineup-arglist (langelem)
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"Line up the current argument line under the first argument.
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Works with: arglist-cont-nonempty, arglist-close."
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(save-excursion
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(beginning-of-line)
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(let ((containing-sexp (c-most-enclosing-brace (c-parse-state))))
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(goto-char (1+ containing-sexp))
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(let ((eol (c-point 'eol)))
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(c-forward-syntactic-ws)
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(when (< (point) eol)
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(goto-char (1+ containing-sexp))
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(skip-chars-forward " \t")))
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(vector (current-column)))))
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;; Contributed by Kevin Ryde <user42@zip.com.au>.
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(defun c-lineup-argcont (elem)
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"Line up a continued argument.
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foo (xyz, aaa + bbb + ccc
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+ ddd + eee + fff); <- c-lineup-argcont
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Only continuation lines like this are touched, `nil' is returned on lines
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which are the start of an argument.
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Within a gcc asm block, \":\" is recognised as an argument separator,
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but of course only between operand specifications, not in the expressions
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for the operands.
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Works with: arglist-cont, arglist-cont-nonempty."
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(save-excursion
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(beginning-of-line)
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(let ((bol (point)))
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;; Previous line ending in a comma means we're the start of an
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;; argument. This should quickly catch most cases not for us.
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(c-backward-syntactic-ws)
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(let ((c (char-before)))
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(unless (eq c ?,)
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;; In a gcc asm, ":" on the previous line means the start of an
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;; argument. And lines starting with ":" are not for us, don't
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;; want them to indent to the preceding operand.
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(let ((gcc-asm (save-excursion
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(goto-char bol)
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(c-in-gcc-asm-p))))
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(unless (and gcc-asm
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(or (eq c ?:)
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(save-excursion
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(goto-char bol)
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(looking-at "[ \t]*:"))))
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(c-lineup-argcont-scan (if gcc-asm ?:))
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(vector (current-column)))))))))
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(defun c-lineup-argcont-scan (&optional other-match)
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;; Find the start of an argument, for `c-lineup-argcont'.
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(when (eq 0 (c-backward-token-1 1 t))
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(let ((c (char-after)))
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(if (or (eq c ?,) (eq c other-match))
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(progn
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(forward-char)
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(c-forward-syntactic-ws))
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(c-lineup-argcont-scan other-match)))))
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(defun c-lineup-arglist-intro-after-paren (langelem)
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"Line up a line just after the open paren of the surrounding paren or
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brace block.
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Works with: defun-block-intro, brace-list-intro,
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statement-block-intro, statement-case-intro, arglist-intro."
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(save-excursion
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(beginning-of-line)
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(backward-up-list 1)
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(skip-chars-forward " \t" (c-point 'eol))
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(vector (1+ (current-column)))))
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(defun c-lineup-arglist-close-under-paren (langelem)
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"Line up a closing paren line under the corresponding open paren.
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Works with: defun-close, class-close, inline-close, block-close,
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brace-list-close, arglist-close, extern-lang-close, namespace-close
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\(for most of these, a zero offset will normally produce the same
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result, though)."
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(save-excursion
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(beginning-of-line)
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(backward-up-list 1)
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(vector (current-column))))
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(defun c-lineup-close-paren (langelem)
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"Line up the closing paren under its corresponding open paren if the
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open paren is followed by code. If the open paren ends its line, no
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indentation is added. E.g:
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main (int, main (
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char ** int, char **
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) <-> ) <- c-lineup-close-paren
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Works with: defun-close, class-close, inline-close, block-close,
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brace-list-close, arglist-close, extern-lang-close, namespace-close."
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(save-excursion
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(condition-case nil
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(let (opencol spec)
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(beginning-of-line)
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(backward-up-list 1)
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(setq spec (c-looking-at-special-brace-list))
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(if spec (goto-char (car (car spec))))
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(setq opencol (current-column))
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(forward-char 1)
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(if spec (progn
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(c-forward-syntactic-ws)
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(forward-char 1)))
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(c-forward-syntactic-ws (c-point 'eol))
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(if (eolp)
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0
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(vector opencol)))
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(error nil))))
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(defun c-lineup-streamop (langelem)
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"Line up C++ stream operators under each other.
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Works with: stream-op."
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(save-excursion
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(goto-char (cdr langelem))
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(re-search-forward "<<\\|>>" (c-point 'eol) 'move)
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(goto-char (match-beginning 0))
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(vector (current-column))))
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(defun c-lineup-multi-inher (langelem)
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"Line up the classes in C++ multiple inheritance clauses and member
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initializers under each other. E.g:
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class Foo: Foo::Foo (int a, int b):
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public Cyphr, Cyphr (a),
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public Bar <-> Bar (b) <- c-lineup-multi-inher
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class Foo Foo::Foo (int a, int b)
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: public Cyphr, : Cyphr (a),
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public Bar <-> Bar (b) <- c-lineup-multi-inher
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class Foo Foo::Foo (int a, int b)
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: public Cyphr : Cyphr (a)
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, public Bar <-> , Bar (b) <- c-lineup-multi-inher
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Works with: inher-cont, member-init-cont."
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(save-excursion
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(let* ((eol (c-point 'eol))
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(here (point))
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(char-after-ip (progn
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(skip-chars-forward " \t")
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(char-after))))
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(if (cdr langelem) (goto-char (cdr langelem)))
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;; This kludge is necessary to support both inher-cont and
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;; member-init-cont, since they have different anchor positions.
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(c-backward-syntactic-ws)
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(when (eq (char-before) ?:)
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(backward-char)
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(c-backward-syntactic-ws))
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(skip-chars-forward "^:" eol)
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(if (eq char-after-ip ?,)
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(skip-chars-forward " \t" eol)
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(skip-chars-forward " \t:" eol))
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(if (or (eolp)
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(looking-at c-comment-start-regexp))
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(c-forward-syntactic-ws here))
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(vector (current-column))
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)))
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(defun c-lineup-java-inher (langelem)
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"Line up Java implements and extends declarations.
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If class names follows on the same line as the implements/extends
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keyword, they are lined up under each other. Otherwise, they are
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indented by adding `c-basic-offset' to the column of the keyword.
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E.g:
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class Foo class Foo
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extends extends Cyphr,
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Bar <-> Bar <- c-lineup-java-inher
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<--> c-basic-offset
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Works with: inher-cont."
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(save-excursion
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(goto-char (cdr langelem))
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(forward-word 1)
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(if (looking-at "[ \t]*$")
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c-basic-offset
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(c-forward-syntactic-ws)
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(vector (current-column)))))
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(defun c-lineup-java-throws (langelem)
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"Line up Java throws declarations.
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If exception names follows on the same line as the throws keyword,
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they are lined up under each other. Otherwise, they are indented by
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adding `c-basic-offset' to the column of the throws keyword. The
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throws keyword itself is also indented by `c-basic-offset' from the
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function declaration start if it doesn't hang. E.g:
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int foo() int foo() throws Cyphr,
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throws <-> Bar, <- c-lineup-java-throws
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Bar <-> Vlod <- c-lineup-java-throws
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<--><--> c-basic-offset
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Works with: func-decl-cont."
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(save-excursion
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(let* ((lim (1- (c-point 'bol)))
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(throws (catch 'done
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(goto-char (cdr langelem))
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(while (zerop (c-forward-token-1 1 t lim))
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(if (looking-at "throws\\>[^_]")
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(throw 'done t))))))
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(if throws
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(if (zerop (c-forward-token-1 1 nil (c-point 'eol)))
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(vector (current-column))
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(back-to-indentation)
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(vector (+ (current-column) c-basic-offset)))
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c-basic-offset))))
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(defun c-indent-one-line-block (langelem)
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"Indent a one line block `c-basic-offset' extra.
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E.g:
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if (n > 0) if (n > 0)
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{m+=n; n=0;} <-> { <- c-indent-one-line-block
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<--> c-basic-offset m+=n; n=0;
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}
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The block may use any kind of parenthesis character. nil is returned
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if the line doesn't start with a one line block, which makes the
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function usable in list expressions.
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Work with: Almost all syntactic symbols, but most useful on *-open."
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(save-excursion
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(let ((eol (c-point 'eol)))
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(back-to-indentation)
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(if (and (eq (char-syntax (char-after)) ?\()
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(c-safe (progn (c-forward-sexp) t))
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(<= (point) eol))
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c-basic-offset
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nil))))
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(defun c-indent-multi-line-block (langelem)
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"Indent a multi line block `c-basic-offset' extra.
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E.g:
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int *foo[] = { int *foo[] = {
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NULL, NULL,
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{17}, <-> { <- c-indent-multi-line-block
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17
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}
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<--> c-basic-offset
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The block may use any kind of parenthesis character. nil is returned
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if the line doesn't start with a multi line block, which makes the
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function usable in list expressions.
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Work with: Almost all syntactic symbols, but most useful on *-open."
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(save-excursion
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(let ((eol (c-point 'eol)))
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(back-to-indentation)
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(if (and (eq (char-syntax (char-after)) ?\()
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(or (not (c-safe (progn (c-forward-sexp) t)))
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(> (point) eol)))
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c-basic-offset
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nil))))
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(defun c-lineup-C-comments (langelem)
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"Line up C block comment continuation lines.
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Various heuristics are used to handle many of the common comment
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styles. Some examples:
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/* /** /* /* text /* /**
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* text * text text text ** text ** text
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*/ */ */ */ */ */
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/*********************************************************************
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* text
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********************************************************************/
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/*********************************************************************
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Free form text comments:
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In comments with a long delimiter line at the start, the indentation
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is kept unchanged for lines that start with an empty comment line
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prefix. The delimiter line is whatever matches the
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`comment-start-skip' regexp.
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*********************************************************************/
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The variable `c-comment-prefix-regexp' is used to recognize the
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comment line prefix, e.g. the `*' that usually starts every line
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inside a comment.
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Works with: The `c' syntactic symbol."
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(save-excursion
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(let* ((here (point))
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(prefixlen (progn (back-to-indentation)
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(if (looking-at c-current-comment-prefix)
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(- (match-end 0) (point))
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0)))
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(starterlen
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;; Get the length of the comment starter, not including
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;; the first '/'. We check if the comment prefix matched
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;; on the current line matches the starter or if it
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;; matches comment-start-skip, and choose whichever is
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;; longest.
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(max (save-excursion
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(goto-char (1+ (cdr langelem)))
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(if (and (match-string 0)
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(looking-at (regexp-quote (match-string 0))))
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(- (match-end 0) (match-beginning 0))
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0))
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(save-excursion
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(goto-char (cdr langelem))
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(looking-at comment-start-skip)
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(- (or (match-end 1)
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(save-excursion
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(goto-char (match-end 0))
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(skip-chars-backward " \t")
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(point)))
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(point)
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1)))))
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(if (and (> starterlen 10) (zerop prefixlen))
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;; The comment has a long starter and the line doesn't have
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;; a nonempty comment prefix. Treat it as free form text
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;; and don't change the indentation.
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(vector (current-column))
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(forward-line -1)
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(back-to-indentation)
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(if (>= (cdr langelem) (point))
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;; On the second line in the comment.
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(if (zerop prefixlen)
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;; No nonempty comment prefix. Align after comment
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;; starter.
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(progn
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(goto-char (match-end 0))
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;; The following should not be necessary, since
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;; comment-start-skip should match everything (i.e.
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;; typically whitespace) that leads up to the text.
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;;(if (looking-at "\\([ \t]+\\).+$")
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;; ;; Align with the text that hangs after the
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;; ;; comment starter.
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;; (goto-char (match-end 1)))
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(vector (current-column)))
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;; How long is the comment starter? if greater than the
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;; length of the comment prefix, align left. if less
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;; than or equal, align right. this should also pick up
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;; Javadoc style comments.
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(if (> starterlen prefixlen)
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(progn
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(goto-char (cdr langelem))
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(vector (1+ (current-column))))
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(goto-char (+ (cdr langelem) starterlen 1))
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(vector (- (current-column) prefixlen))))
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;; Not on the second line in the comment. If the previous
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;; line has a nonempty comment prefix, align with it.
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;; Otherwise, align with the previous nonempty line, but
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;; align the comment ender with the starter.
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(when (or (not (looking-at c-current-comment-prefix))
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(eq (match-beginning 0) (match-end 0)))
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(goto-char here)
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(back-to-indentation)
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(if (looking-at (concat "\\(" c-current-comment-prefix "\\)\\*/"))
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(goto-char (cdr langelem))
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(while (and (zerop (forward-line -1))
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(looking-at "^[ \t]*$")))
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(back-to-indentation)
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(if (< (point) (cdr langelem))
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;; Align with the comment starter rather than
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;; with the code before it.
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(goto-char (cdr langelem)))))
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(vector (current-column)))))))
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(defun c-lineup-comment (langelem)
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"Line up a comment start according to `c-comment-only-line-offset'.
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If the comment is lined up with a comment starter on the previous
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line, that alignment is preserved.
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Works with: comment-intro."
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(save-excursion
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(back-to-indentation)
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(let ((col (current-column)))
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(cond
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;; CASE 1: preserve aligned comments
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((save-excursion
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(and (c-forward-comment -1)
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(= col (current-column))))
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(vector col)) ; Return an absolute column.
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;; indent as specified by c-comment-only-line-offset
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((not (bolp))
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(or (car-safe c-comment-only-line-offset)
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c-comment-only-line-offset))
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(t
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(or (cdr-safe c-comment-only-line-offset)
|
||
(car-safe c-comment-only-line-offset)
|
||
-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:
|
||
|
||
int main()
|
||
{ puts (\"Hello world!\");
|
||
return 0; <- c-lineup-runin-statements
|
||
}
|
||
|
||
If there is no statement after the opening brace to align with, nil is
|
||
returned. This makes the function usable in list expressions.
|
||
|
||
Works with: The `statement' syntactic symbol."
|
||
(if (eq (char-after (cdr langelem)) ?{)
|
||
(save-excursion
|
||
(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
|
||
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, arglist-cont, arglist-cont-nonempty."
|
||
(save-excursion
|
||
(let ((equalp (save-excursion
|
||
(goto-char (c-point 'boi))
|
||
(let ((eol (c-point 'eol)))
|
||
(c-forward-token-1 0 t eol)
|
||
(while (and (not (eq (char-after) ?=))
|
||
(= (c-forward-token-1 1 t eol) 0))))
|
||
(and (eq (char-after) ?=)
|
||
(- (point) (c-point 'boi)))))
|
||
donep)
|
||
(if (cdr langelem) (goto-char (cdr langelem)))
|
||
(while (and (not donep)
|
||
(< (point) (c-point 'eol)))
|
||
(skip-chars-forward "^=" (c-point 'eol))
|
||
(if (c-in-literal (cdr langelem))
|
||
(forward-char 1)
|
||
(setq donep t)))
|
||
(if (or (not (eq (char-after) ?=))
|
||
(save-excursion
|
||
(forward-char 1)
|
||
(c-forward-syntactic-ws (c-point 'eol))
|
||
(eolp)))
|
||
;; there's no equal sign on the line
|
||
c-basic-offset
|
||
;; calculate indentation column after equals and ws, unless
|
||
;; our line contains an equals sign
|
||
(if (not equalp)
|
||
(progn
|
||
(forward-char 1)
|
||
(skip-chars-forward " \t")
|
||
(setq equalp 0)))
|
||
(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
|
||
returned if there's no template argument on the first line.
|
||
|
||
Works with: template-args-cont."
|
||
(save-excursion
|
||
(c-with-syntax-table c++-template-syntax-table
|
||
(beginning-of-line)
|
||
(backward-up-list 1)
|
||
(if (and (eq (char-after) ?<)
|
||
(zerop (c-forward-token-1 1 nil (c-point 'eol))))
|
||
(vector (current-column))))))
|
||
|
||
(defun c-lineup-ObjC-method-call (langelem)
|
||
"Line up selector args as elisp-mode does with function args:
|
||
Go to the position right after the message receiver, and if you are at
|
||
the end of the line, indent the current line c-basic-offset columns
|
||
from the opening bracket; otherwise you are looking at the first
|
||
character of the first method call argument, so lineup the current
|
||
line with it.
|
||
|
||
Works with: objc-method-call-cont."
|
||
(save-excursion
|
||
(let* ((extra (save-excursion
|
||
(back-to-indentation)
|
||
(c-backward-syntactic-ws (cdr langelem))
|
||
(if (eq (char-before) ?:)
|
||
(- c-basic-offset)
|
||
0)))
|
||
(open-bracket-pos (cdr langelem))
|
||
(open-bracket-col (progn
|
||
(goto-char open-bracket-pos)
|
||
(current-column)))
|
||
(target-col (progn
|
||
(forward-char)
|
||
(c-forward-sexp)
|
||
(skip-chars-forward " \t")
|
||
(if (eolp)
|
||
(+ open-bracket-col c-basic-offset)
|
||
(current-column))))
|
||
)
|
||
(- target-col open-bracket-col extra))))
|
||
|
||
(defun c-lineup-ObjC-method-args (langelem)
|
||
"Line up the colons that separate args.
|
||
The colon on the current line is aligned with the one on the first
|
||
line.
|
||
|
||
Works with: objc-method-args-cont."
|
||
(save-excursion
|
||
(let* ((here (c-point 'boi))
|
||
(curcol (progn (goto-char here) (current-column)))
|
||
(eol (c-point 'eol))
|
||
(relpos (cdr langelem))
|
||
(first-col-column (progn
|
||
(goto-char relpos)
|
||
(skip-chars-forward "^:" eol)
|
||
(and (eq (char-after) ?:)
|
||
(current-column)))))
|
||
(if (not first-col-column)
|
||
c-basic-offset
|
||
(goto-char here)
|
||
(skip-chars-forward "^:" eol)
|
||
(if (eq (char-after) ?:)
|
||
(+ curcol (- first-col-column (current-column)))
|
||
c-basic-offset)))))
|
||
|
||
(defun c-lineup-ObjC-method-args-2 (langelem)
|
||
"Line up the colons that separate args.
|
||
The colon on the current line is aligned with the one on the previous
|
||
line.
|
||
|
||
Works with: objc-method-args-cont."
|
||
(save-excursion
|
||
(let* ((here (c-point 'boi))
|
||
(curcol (progn (goto-char here) (current-column)))
|
||
(eol (c-point 'eol))
|
||
(relpos (cdr langelem))
|
||
(prev-col-column (progn
|
||
(skip-chars-backward "^:" relpos)
|
||
(and (eq (char-before) ?:)
|
||
(- (current-column) 1)))))
|
||
(if (not prev-col-column)
|
||
c-basic-offset
|
||
(goto-char here)
|
||
(skip-chars-forward "^:" eol)
|
||
(if (eq (char-after) ?:)
|
||
(+ curcol (- prev-col-column (current-column)))
|
||
c-basic-offset)))))
|
||
|
||
(defun c-lineup-inexpr-block (langelem)
|
||
"Line up the block for constructs that use a block inside an expression,
|
||
e.g. anonymous classes in Java and lambda functions in Pike. The body
|
||
is aligned with the start of the header, e.g. with the \"new\" or
|
||
\"lambda\" keyword. Returns nil if the block isn't part of such a
|
||
construct.
|
||
|
||
Works with: inlambda, inexpr-statement, inexpr-class."
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(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)
|
||
(progn
|
||
(back-to-indentation)
|
||
(current-column)))))))
|
||
|
||
(defun c-lineup-whitesmith-in-block (langelem)
|
||
"Line up lines inside a block in whitesmith style.
|
||
It's done in a way that works both when the opening brace hangs and
|
||
when it doesn't. E.g:
|
||
|
||
something
|
||
{ something {
|
||
foo; <-> foo; <- c-lineup-whitesmith-in-block
|
||
} }
|
||
<--> c-basic-offset
|
||
|
||
In the first case the indentation is kept unchanged, in the
|
||
second `c-basic-offset' is added.
|
||
|
||
Works with: defun-close, defun-block-intro, block-close,
|
||
brace-list-close, brace-list-intro, statement-block-intro, inclass,
|
||
inextern-lang, innamespace."
|
||
(save-excursion
|
||
(goto-char (cdr langelem))
|
||
(back-to-indentation)
|
||
(if (eq (char-syntax (char-after)) ?\()
|
||
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.
|
||
|
||
Works with: Any syntactic symbol."
|
||
(save-excursion
|
||
(back-to-indentation)
|
||
(vector (current-column))))
|
||
|
||
|
||
(defun c-snug-do-while (syntax pos)
|
||
"Dynamically calculate brace hanginess for do-while statements.
|
||
Using this function, `while' clauses that end a `do-while' block will
|
||
remain on the same line as the brace that closes that block.
|
||
|
||
See `c-hanging-braces-alist' for how to utilize this function as an
|
||
ACTION associated with `block-close' syntax."
|
||
(save-excursion
|
||
(let (langelem)
|
||
(if (and (eq syntax 'block-close)
|
||
(setq langelem (assq 'block-close c-syntactic-context))
|
||
(progn (goto-char (cdr langelem))
|
||
(if (eq (char-after) ?{)
|
||
(c-safe (c-forward-sexp -1)))
|
||
(looking-at "\\<do\\>[^_]")))
|
||
'(before)
|
||
'(before after)))))
|
||
|
||
(defun c-gnu-impose-minimum ()
|
||
"Imposes a minimum indentation for lines inside a top-level construct.
|
||
The variable `c-label-minimum-indentation' specifies the minimum
|
||
indentation amount."
|
||
(let ((non-top-levels '(defun-block-intro statement statement-cont
|
||
statement-block-intro statement-case-intro
|
||
statement-case-open substatement substatement-open
|
||
case-label label do-while-closure else-clause
|
||
))
|
||
(syntax c-syntactic-context)
|
||
langelem)
|
||
(while syntax
|
||
(setq langelem (car (car syntax))
|
||
syntax (cdr syntax))
|
||
;; don't adjust macro or comment-only lines
|
||
(cond ((memq langelem '(cpp-macro comment-intro))
|
||
(setq syntax nil))
|
||
((memq langelem non-top-levels)
|
||
(save-excursion
|
||
(setq syntax nil)
|
||
(back-to-indentation)
|
||
(if (zerop (current-column))
|
||
(insert-char ?\ c-label-minimum-indentation t))
|
||
))
|
||
))))
|
||
|
||
|
||
;; Useful for c-hanging-semi&comma-criteria
|
||
|
||
(defun c-semi&comma-inside-parenlist ()
|
||
"Controls newline insertion after semicolons in parenthesis lists.
|
||
If a comma was inserted, no determination is made. If a semicolon was
|
||
inserted inside a parenthesis list, no newline is added otherwise a
|
||
newline is added. In either case, checking is stopped. This supports
|
||
exactly the old newline insertion behavior."
|
||
;; newline only after semicolon, but only if that semicolon is not
|
||
;; inside a parenthesis list (e.g. a for loop statement)
|
||
(if (not (eq last-command-char ?\;))
|
||
nil ; continue checking
|
||
(if (condition-case nil
|
||
(save-excursion
|
||
(up-list -1)
|
||
(not (eq (char-after) ?\()))
|
||
(error t))
|
||
t
|
||
'stop)))
|
||
|
||
;; Suppresses newlines before non-blank lines
|
||
(defun c-semi&comma-no-newlines-before-nonblanks ()
|
||
"Controls newline insertion after semicolons.
|
||
If a comma was inserted, no determination is made. If a semicolon was
|
||
inserted, and the following line is not blank, no newline is inserted.
|
||
Otherwise, no determination is made."
|
||
(save-excursion
|
||
(if (and (= last-command-char ?\;)
|
||
;;(/= (point-max)
|
||
;; (save-excursion (skip-syntax-forward " ") (point))
|
||
(zerop (forward-line 1))
|
||
(not (looking-at "^[ \t]*$")))
|
||
'stop
|
||
nil)))
|
||
|
||
;; Suppresses new lines after semicolons in one-liners methods
|
||
(defun c-semi&comma-no-newlines-for-oneline-inliners ()
|
||
"Controls newline insertion after semicolons for some one-line methods.
|
||
If a comma was inserted, no determination is made. Newlines are
|
||
suppressed in one-liners, if the line is an in-class inline function.
|
||
For other semicolon contexts, no determination is made."
|
||
(let ((syntax (c-guess-basic-syntax))
|
||
(bol (save-excursion
|
||
(if (c-safe (up-list -1) t)
|
||
(c-point 'bol)
|
||
-1))))
|
||
(if (and (eq last-command-char ?\;)
|
||
(eq (car (car syntax)) 'inclass)
|
||
(eq (car (car (cdr syntax))) 'topmost-intro)
|
||
(= (c-point 'bol) bol))
|
||
'stop
|
||
nil)))
|
||
|
||
|
||
(cc-provide 'cc-align)
|
||
|
||
;;; cc-align.el ends here
|