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7000 lines
254 KiB
EmacsLisp
7000 lines
254 KiB
EmacsLisp
;;; cc-engine.el --- core syntax guessing engine for CC mode
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;; Copyright (C) 1985,1987,1992-2003 Free Software Foundation, Inc.
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;; Authors: 1998- Martin Stjernholm
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;; 1992-1999 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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;; The functions which have docstring documentation can be considered
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;; part of an API which other packages can use in CC Mode buffers.
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;; Otoh, undocumented functions and functions with the documentation
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;; in comments are considered purely internal and can change semantics
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;; or even disappear in the future.
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;;
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;; (This policy applies to CC Mode as a whole, not just this file. It
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;; probably also applies to many other Emacs packages, but here it's
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;; clearly spelled out.)
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;; Hidden buffer changes
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;;
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;; Various functions in CC Mode use text properties for caching and
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;; syntactic markup purposes, and those of them that might modify such
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;; properties are said to do "hidden buffer changes". They should be
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;; used within `c-save-buffer-state' or a similar function that saves
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;; and restores buffer modifiedness etc.
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;;
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;; Interactive functions are assumed to not do hidden buffer changes
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;; (this isn't applicable in the specific parts of them that do real
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;; changes, though).
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;;
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;; All other functions are assumed to do hidden buffer changes and
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;; must thus be wrapped inside `c-save-buffer-state' if they're used
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;; from any function that does not do hidden buffer changes.
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;;
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;; Every function, except the interactive ones, that doesn't do hidden
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;; buffer changes have that explicitly stated in their docstring or
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;; comment.
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;; Use of text properties
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;;
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;; CC Mode uses several text properties internally to mark up various
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;; positions, e.g. to improve speed and to eliminate glitches in
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;; interactive refontification.
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;;
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;; Note: This doc is for internal use only. Other packages should not
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;; assume that these text properties are used as described here.
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;;
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;; 'syntax-table
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;; Used to modify the syntax of some characters. Currently used to
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;; mark the "<" and ">" of angle bracket parens with paren syntax.
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;;
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;; This property is used on single characters and is therefore
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;; always treated as front and rear nonsticky (or start and end open
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;; in XEmacs vocabulary). It's therefore installed on
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;; `text-property-default-nonsticky' if that variable exists (Emacs
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;; >= 21).
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;;
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;; 'c-is-sws and 'c-in-sws
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;; Used by `c-forward-syntactic-ws' and `c-backward-syntactic-ws' to
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;; speed them up. See the comment blurb before `c-put-is-sws'
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;; below for further details.
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;;
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;; 'c-type
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;; This property is used on single characters to mark positions with
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;; special syntactic relevance of various sorts. It's primary use
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;; is to avoid glitches when multiline constructs are refontified
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;; interactively (on font lock decoration level 3). It's cleared in
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;; a region before it's fontified and is then put on relevant chars
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;; in that region as they are encountered during the fontification.
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;; The value specifies the kind of position:
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;;
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;; 'c-decl-arg-start
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;; Put on the last char of the token preceding each declaration
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;; inside a declaration style arglist (typically in a function
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;; prototype).
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;;
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;; 'c-decl-end
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;; Put on the last char of the token preceding a declaration.
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;; This is used in cases where declaration boundaries can't be
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;; recognized simply by looking for a token like ";" or "}".
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;; `c-type-decl-end-used' must be set if this is used (see also
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;; `c-find-decl-spots').
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;;
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;; 'c-<>-arg-sep
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;; Put on the commas that separate arguments in angle bracket
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;; arglists like C++ template arglists.
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;;
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;; 'c-decl-id-start and 'c-decl-type-start
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;; Put on the last char of the token preceding each declarator
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;; in the declarator list of a declaration. They are also used
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;; between the identifiers cases like enum declarations.
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;; 'c-decl-type-start is used when the declarators are types,
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;; 'c-decl-id-start otherwise.
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;;
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;; 'c-awk-NL-prop
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;; Used in AWK mode to mark the various kinds of newlines. See
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;; cc-awk.el.
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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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(load "cc-bytecomp" nil t)))
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(cc-require 'cc-defs)
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(cc-require-when-compile 'cc-langs)
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(cc-require 'cc-vars)
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;; Some functions/constants in cc-awk.el that are called/referenced here.
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;; (Can't use cc-require due to cyclicity.)
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(cc-bytecomp-defun c-awk-unstick-NL-prop)
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(cc-bytecomp-defun c-awk-clear-NL-props)
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(cc-bytecomp-defvar awk-mode-syntax-table)
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(cc-bytecomp-defun c-awk-backward-syntactic-ws)
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(cc-bytecomp-defun c-awk-after-logical-semicolon)
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(cc-bytecomp-defun c-awk-NL-prop-not-set)
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(cc-bytecomp-defun c-awk-completed-stmt-ws-ends-line-p)
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(cc-bytecomp-defun c-awk-completed-stmt-ws-ends-prev-line-p)
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(cc-bytecomp-defun c-awk-prev-line-incomplete-p)
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(cc-bytecomp-defun c-awk-after-change)
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;; Silence the compiler.
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(cc-bytecomp-defun buffer-syntactic-context) ; XEmacs
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;; Make declarations for all the `c-lang-defvar' variables in cc-langs.
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(defmacro c-declare-lang-variables ()
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`(progn
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,@(apply 'nconc
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(mapcar (lambda (init)
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`(,(if (elt init 2)
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`(defvar ,(car init) nil ,(elt init 2))
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`(defvar ,(car init) nil))
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(make-variable-buffer-local ',(car init))))
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(cdr c-lang-variable-inits)))))
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(c-declare-lang-variables)
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;;; Internal state variables.
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;; Internal state of hungry delete key feature
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(defvar c-hungry-delete-key nil)
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(make-variable-buffer-local 'c-hungry-delete-key)
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;; Internal state of auto newline feature.
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(defvar c-auto-newline nil)
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(make-variable-buffer-local 'c-auto-newline)
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;; Internal auto-newline/hungry-delete designation string for mode line.
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(defvar c-auto-hungry-string nil)
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(make-variable-buffer-local 'c-auto-hungry-string)
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(defun c-calculate-state (arg prevstate)
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;; Calculate the new state of PREVSTATE, t or nil, based on arg. If
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;; arg is nil or zero, toggle the state. If arg is negative, turn
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;; the state off, and if arg is positive, turn the state on
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(if (or (not arg)
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(zerop (setq arg (prefix-numeric-value arg))))
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(not prevstate)
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(> arg 0)))
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;; Dynamically bound cache for `c-in-literal'.
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(defvar c-in-literal-cache t)
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;; Must be set in buffers where the `c-type' text property might be used
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;; with the value `c-decl-end'.
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(defvar c-type-decl-end-used nil)
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(make-variable-buffer-local 'c-type-decl-end-used)
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;; Basic handling of preprocessor directives.
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;; This is a dynamically bound cache used together with
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;; `c-query-macro-start' and `c-query-and-set-macro-start'. It only
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;; works as long as point doesn't cross a macro boundary.
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(defvar c-macro-start 'unknown)
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(defsubst c-query-and-set-macro-start ()
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;; This function does not do any hidden buffer changes.
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(if (symbolp c-macro-start)
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(setq c-macro-start (save-excursion
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(and (c-beginning-of-macro)
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(point))))
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c-macro-start))
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(defsubst c-query-macro-start ()
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;; This function does not do any hidden buffer changes.
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(if (symbolp c-macro-start)
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(save-excursion
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(and (c-beginning-of-macro)
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(point)))
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c-macro-start))
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(defun c-beginning-of-macro (&optional lim)
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"Go to the beginning of a preprocessor directive.
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Leave point at the beginning of the directive and return t if in one,
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otherwise return nil and leave point unchanged.
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This function does not do any hidden buffer changes."
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(when c-opt-cpp-prefix
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(let ((here (point)))
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(save-restriction
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(if lim (narrow-to-region lim (point-max)))
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(beginning-of-line)
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(while (eq (char-before (1- (point))) ?\\)
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(forward-line -1))
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(back-to-indentation)
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(if (and (<= (point) here)
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(looking-at c-opt-cpp-start))
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t
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(goto-char here)
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nil)))))
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(defun c-end-of-macro ()
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"Go to the end of a preprocessor directive.
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More accurately, move point to the end of the closest following line
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that doesn't end with a line continuation backslash.
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This function does not do any hidden buffer changes."
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(while (progn
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(end-of-line)
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(when (and (eq (char-before) ?\\)
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(not (eobp)))
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(forward-char)
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t))))
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(defun c-forward-to-cpp-define-body ()
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;; Assuming point is at the "#" that introduces a preprocessor
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;; directive, it's moved forward to the start of the definition body
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;; if it's a "#define". Non-nil is returned in this case, in all
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;; other cases nil is returned and point isn't moved.
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(when (and (looking-at
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(concat "#[ \t]*"
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"define[ \t]+\\(\\sw\\|_\\)+\\(\([^\)]*\)\\)?"
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"\\([ \t]\\|\\\\\n\\)*"))
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(not (= (match-end 0) (c-point 'eol))))
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(goto-char (match-end 0))))
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;;; Basic utility functions.
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(defun c-syntactic-content (from to)
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;; Return the given region as a string where all syntactic
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;; whitespace is removed or, where necessary, replaced with a single
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;; space.
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(save-excursion
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(goto-char from)
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(let* ((parts (list nil)) (tail parts) pos)
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(while (re-search-forward c-syntactic-ws-start to t)
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(goto-char (setq pos (match-beginning 0)))
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(c-forward-syntactic-ws to)
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(if (= (point) pos)
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(forward-char)
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(if (and (> pos from)
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(< (point) to)
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(looking-at "\\w\\|\\s_")
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(save-excursion
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(goto-char (1- pos))
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(looking-at "\\w\\|\\s_")))
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(progn
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(setcdr tail (list (buffer-substring-no-properties from pos)
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" "))
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(setq tail (cddr tail)))
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(setcdr tail (list (buffer-substring-no-properties from pos)))
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(setq tail (cdr tail)))
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(setq from (point))))
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(setcdr tail (list (buffer-substring-no-properties from to)))
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(apply 'concat (cdr parts)))))
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(defsubst c-keyword-sym (keyword)
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;; Return non-nil if the string KEYWORD is a known keyword. More
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;; precisely, the value is the symbol for the keyword in
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;; `c-keywords-obarray'.
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(intern-soft keyword c-keywords-obarray))
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(defsubst c-keyword-member (keyword-sym lang-constant)
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;; Return non-nil if the symbol KEYWORD-SYM, as returned by
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;; `c-keyword-sym', is a member of LANG-CONSTANT, which is the name
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;; of a language constant that ends with "-kwds". If KEYWORD-SYM is
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;; nil then the result is nil.
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(get keyword-sym lang-constant))
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;; String syntax chars, suitable for skip-syntax-(forward|backward).
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(defconst c-string-syntax (if (memq 'gen-string-delim c-emacs-features)
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"\"|"
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"\""))
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;; Regexp matching string start syntax.
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(defconst c-string-limit-regexp (if (memq 'gen-string-delim c-emacs-features)
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"\\s\"\\|\\s|"
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"\\s\""))
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;; Holds formatted error strings for the few cases where parse errors
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;; are reported.
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(defvar c-parsing-error nil)
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(make-variable-buffer-local 'c-parsing-error)
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(defun c-echo-parsing-error (&optional quiet)
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;; This function does not do any hidden buffer changes.
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(when (and c-report-syntactic-errors c-parsing-error (not quiet))
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(c-benign-error "%s" c-parsing-error))
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c-parsing-error)
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;; Faces given to comments and string literals. This is used in some
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;; situations to speed up recognition; it isn't mandatory that font
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;; locking is in use. This variable is extended with the face in
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;; `c-doc-face-name' when fontification is activated in cc-fonts.el.
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(defvar c-literal-faces
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'(font-lock-comment-face font-lock-string-face
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font-lock-comment-delimiter-face))
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(defun c-shift-line-indentation (shift-amt)
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;; This function does not do any hidden buffer changes.
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(let ((pos (- (point-max) (point)))
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(c-macro-start c-macro-start)
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tmp-char-inserted)
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(if (zerop shift-amt)
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nil
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(when (and (c-query-and-set-macro-start)
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(looking-at "[ \t]*\\\\$")
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(save-excursion
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(skip-chars-backward " \t")
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(bolp)))
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(insert ?x)
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(backward-char)
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(setq tmp-char-inserted t))
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(unwind-protect
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(let ((col (current-indentation)))
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(delete-region (c-point 'bol) (c-point 'boi))
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(beginning-of-line)
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(indent-to (+ col shift-amt)))
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(when tmp-char-inserted
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(delete-char 1))))
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;; If initial point was within line's indentation and we're not on
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;; a line with a line continuation in a macro, position after the
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;; indentation. Else stay at same point in text.
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(if (and (< (point) (c-point 'boi))
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(not tmp-char-inserted))
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(back-to-indentation)
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(if (> (- (point-max) pos) (point))
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(goto-char (- (point-max) pos))))))
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;; Some debug tools to visualize various special positions. This
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;; debug code isn't as portable as the rest of CC Mode.
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(cc-bytecomp-defun overlays-in)
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(cc-bytecomp-defun overlay-get)
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(cc-bytecomp-defun overlay-start)
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||
(cc-bytecomp-defun overlay-end)
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||
(cc-bytecomp-defun delete-overlay)
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||
(cc-bytecomp-defun overlay-put)
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||
(cc-bytecomp-defun make-overlay)
|
||
|
||
(defun c-debug-add-face (beg end face)
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||
(c-save-buffer-state ((overlays (overlays-in beg end)) overlay)
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||
(while overlays
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||
(setq overlay (car overlays)
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overlays (cdr overlays))
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||
(when (eq (overlay-get overlay 'face) face)
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||
(setq beg (min beg (overlay-start overlay))
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||
end (max end (overlay-end overlay)))
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||
(delete-overlay overlay)))
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||
(overlay-put (make-overlay beg end) 'face face)))
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||
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||
(defun c-debug-remove-face (beg end face)
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||
(c-save-buffer-state ((overlays (overlays-in beg end)) overlay
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||
(ol-beg beg) (ol-end end))
|
||
(while overlays
|
||
(setq overlay (car overlays)
|
||
overlays (cdr overlays))
|
||
(when (eq (overlay-get overlay 'face) face)
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||
(setq ol-beg (min ol-beg (overlay-start overlay))
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||
ol-end (max ol-end (overlay-end overlay)))
|
||
(delete-overlay overlay)))
|
||
(when (< ol-beg beg)
|
||
(overlay-put (make-overlay ol-beg beg) 'face face))
|
||
(when (> ol-end end)
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||
(overlay-put (make-overlay end ol-end) 'face face))))
|
||
|
||
|
||
;; `c-beginning-of-statement-1' and accompanying stuff.
|
||
|
||
;; KLUDGE ALERT: c-maybe-labelp is used to pass information between
|
||
;; c-crosses-statement-barrier-p and c-beginning-of-statement-1. A
|
||
;; better way should be implemented, but this will at least shut up
|
||
;; the byte compiler.
|
||
(defvar c-maybe-labelp nil)
|
||
|
||
;; New awk-compatible version of c-beginning-of-statement-1, ACM 2002/6/22
|
||
|
||
;; Macros used internally in c-beginning-of-statement-1 for the
|
||
;; automaton actions.
|
||
(defmacro c-bos-push-state ()
|
||
'(setq stack (cons (cons state saved-pos)
|
||
stack)))
|
||
(defmacro c-bos-pop-state (&optional do-if-done)
|
||
`(if (setq state (car (car stack))
|
||
saved-pos (cdr (car stack))
|
||
stack (cdr stack))
|
||
t
|
||
,do-if-done
|
||
(throw 'loop nil)))
|
||
(defmacro c-bos-pop-state-and-retry ()
|
||
'(throw 'loop (setq state (car (car stack))
|
||
saved-pos (cdr (car stack))
|
||
;; Throw nil if stack is empty, else throw non-nil.
|
||
stack (cdr stack))))
|
||
(defmacro c-bos-save-pos ()
|
||
'(setq saved-pos (vector pos tok ptok pptok)))
|
||
(defmacro c-bos-restore-pos ()
|
||
'(unless (eq (elt saved-pos 0) start)
|
||
(setq pos (elt saved-pos 0)
|
||
tok (elt saved-pos 1)
|
||
ptok (elt saved-pos 2)
|
||
pptok (elt saved-pos 3))
|
||
(goto-char pos)
|
||
(setq sym nil)))
|
||
(defmacro c-bos-save-error-info (missing got)
|
||
`(setq saved-pos (vector pos ,missing ,got)))
|
||
(defmacro c-bos-report-error ()
|
||
'(unless noerror
|
||
(setq c-parsing-error
|
||
(format "No matching `%s' found for `%s' on line %d"
|
||
(elt saved-pos 1)
|
||
(elt saved-pos 2)
|
||
(1+ (count-lines (point-min)
|
||
(c-point 'bol (elt saved-pos 0))))))))
|
||
|
||
(defun c-beginning-of-statement-1 (&optional lim ignore-labels
|
||
noerror comma-delim)
|
||
"Move to the start of the current statement or declaration, or to
|
||
the previous one if already at the beginning of one. Only
|
||
statements/declarations on the same level are considered, i.e. don't
|
||
move into or out of sexps (not even normal expression parentheses).
|
||
|
||
Stop at statement continuation tokens like \"else\", \"catch\",
|
||
\"finally\" and the \"while\" in \"do ... while\" if the start point
|
||
is within the continuation. If starting at such a token, move to the
|
||
corresponding statement start. If at the beginning of a statement,
|
||
move to the closest containing statement if there is any. This might
|
||
also stop at a continuation clause.
|
||
|
||
Labels are treated as separate statements if IGNORE-LABELS is non-nil.
|
||
The function is not overly intelligent in telling labels from other
|
||
uses of colons; if used outside a statement context it might trip up
|
||
on e.g. inherit colons, so IGNORE-LABELS should be used then. There
|
||
should be no such mistakes in a statement context, however.
|
||
|
||
Macros are ignored unless point is within one, in which case the
|
||
content of the macro is treated as normal code. Aside from any normal
|
||
statement starts found in it, stop at the first token of the content
|
||
in the macro, i.e. the expression of an \"#if\" or the start of the
|
||
definition in a \"#define\". Also stop at start of macros before
|
||
leaving them.
|
||
|
||
Return 'label if stopped at a label, 'same if stopped at the beginning
|
||
of the current statement, 'up if stepped to a containing statement,
|
||
'previous if stepped to a preceding statement, 'beginning if stepped
|
||
from a statement continuation clause to its start clause, or 'macro if
|
||
stepped to a macro start. Note that 'same and not 'label is returned
|
||
if stopped at the same label without crossing the colon character.
|
||
|
||
LIM may be given to limit the search. If the search hits the limit,
|
||
point will be left at the closest following token, or at the start
|
||
position if that is less ('same is returned in this case).
|
||
|
||
NOERROR turns off error logging to `c-parsing-error'.
|
||
|
||
Normally only ';' is considered to delimit statements, but if
|
||
COMMA-DELIM is non-nil then ',' is treated likewise."
|
||
|
||
;; The bulk of this function is a pushdown automaton that looks at statement
|
||
;; boundaries and the tokens (such as "while") in c-opt-block-stmt-key. Its
|
||
;; purpose is to keep track of nested statements, ensuring that such
|
||
;; statments are skipped over in their entirety (somewhat akin to what C-M-p
|
||
;; does with nested braces/brackets/parentheses).
|
||
;;
|
||
;; Note: The position of a boundary is the following token.
|
||
;;
|
||
;; Beginning with the current token (the one following point), move back one
|
||
;; sexp at a time (where a sexp is, more or less, either a token or the
|
||
;; entire contents of a brace/bracket/paren pair). Each time a statement
|
||
;; boundary is crossed or a "while"-like token is found, update the state of
|
||
;; the PDA. Stop at the beginning of a statement when the stack (holding
|
||
;; nested statement info) is empty and the position has been moved.
|
||
;;
|
||
;; The following variables constitute the PDA:
|
||
;;
|
||
;; sym: This is either the "while"-like token (e.g. 'for) we've just
|
||
;; scanned back over, 'boundary if we've just gone back over a
|
||
;; statement boundary, or nil otherwise.
|
||
;; state: takes one of the values (nil else else-boundary while
|
||
;; while-boundary catch catch-boundary).
|
||
;; nil means "no "while"-like token yet scanned".
|
||
;; 'else, for example, means "just gone back over an else".
|
||
;; 'else-boundary means "just gone back over a statement boundary
|
||
;; immediately after having gone back over an else".
|
||
;; saved-pos: A vector of either saved positions (tok ptok pptok, etc.) or
|
||
;; of error reporting information.
|
||
;; stack: The stack onto which the PDA pushes its state. Each entry
|
||
;; consists of a saved value of state and saved-pos. An entry is
|
||
;; pushed when we move back over a "continuation" token (e.g. else)
|
||
;; and popped when we encounter the corresponding opening token
|
||
;; (e.g. if).
|
||
;;
|
||
;;
|
||
;; The following diagram briefly outlines the PDA.
|
||
;;
|
||
;; Common state:
|
||
;; "else": Push state, goto state `else'.
|
||
;; "while": Push state, goto state `while'.
|
||
;; "catch" or "finally": Push state, goto state `catch'.
|
||
;; boundary: Pop state.
|
||
;; other: Do nothing special.
|
||
;;
|
||
;; State `else':
|
||
;; boundary: Goto state `else-boundary'.
|
||
;; other: Error, pop state, retry token.
|
||
;;
|
||
;; State `else-boundary':
|
||
;; "if": Pop state.
|
||
;; boundary: Error, pop state.
|
||
;; other: See common state.
|
||
;;
|
||
;; State `while':
|
||
;; boundary: Save position, goto state `while-boundary'.
|
||
;; other: Pop state, retry token.
|
||
;;
|
||
;; State `while-boundary':
|
||
;; "do": Pop state.
|
||
;; boundary: Restore position if it's not at start, pop state. [*see below]
|
||
;; other: See common state.
|
||
;;
|
||
;; State `catch':
|
||
;; boundary: Goto state `catch-boundary'.
|
||
;; other: Error, pop state, retry token.
|
||
;;
|
||
;; State `catch-boundary':
|
||
;; "try": Pop state.
|
||
;; "catch": Goto state `catch'.
|
||
;; boundary: Error, pop state.
|
||
;; other: See common state.
|
||
;;
|
||
;; [*] In the `while-boundary' state, we had pushed a 'while state, and were
|
||
;; searching for a "do" which would have opened a do-while. If we didn't
|
||
;; find it, we discard the analysis done since the "while", go back to this
|
||
;; token in the buffer and restart the scanning there, this time WITHOUT
|
||
;; pushing the 'while state onto the stack.
|
||
;;
|
||
;; In addition to the above there is some special handling of labels
|
||
;; and macros.
|
||
|
||
(let ((case-fold-search nil)
|
||
(start (point))
|
||
macro-start
|
||
(delims (if comma-delim '(?\; ?,) '(?\;)))
|
||
(c-stmt-delim-chars (if comma-delim
|
||
c-stmt-delim-chars-with-comma
|
||
c-stmt-delim-chars))
|
||
pos ; Current position.
|
||
boundary-pos ; Position of last stmt boundary character (e.g. ;).
|
||
after-labels-pos ; Value of tok after first found colon.
|
||
last-label-pos ; Value of tok after last found colon.
|
||
sym ; Symbol just scanned back over (e.g. 'while or
|
||
; 'boundary). See above
|
||
state ; Current state in the automaton. See above.
|
||
saved-pos ; Current saved positions. See above
|
||
stack ; Stack of conses (state . saved-pos).
|
||
(cond-key (or c-opt-block-stmt-key ; regexp which matches "for", "if", etc.
|
||
"\\<\\>")) ; Matches nothing.
|
||
(ret 'same) ; Return value.
|
||
tok ptok pptok ; Pos of last three sexps or bounds.
|
||
c-in-literal-cache c-maybe-labelp saved)
|
||
|
||
(save-restriction
|
||
(if lim (narrow-to-region lim (point-max)))
|
||
|
||
(if (save-excursion
|
||
(and (c-beginning-of-macro)
|
||
(/= (point) start)))
|
||
(setq macro-start (point)))
|
||
|
||
;; Try to skip back over unary operator characters, to register
|
||
;; that we've moved.
|
||
(while (progn
|
||
(setq pos (point))
|
||
(if (c-mode-is-new-awk-p)
|
||
(c-awk-backward-syntactic-ws)
|
||
(c-backward-syntactic-ws))
|
||
(/= (skip-chars-backward "-+!*&~@`#") 0))) ; ACM, 2002/5/31;
|
||
; Make a variable in
|
||
; cc-langs.el, maybe
|
||
|
||
;; Skip back over any semicolon here. If it was a bare semicolon, we're
|
||
;; done. Later on we ignore the boundaries for statements that doesn't
|
||
;; contain any sexp. The only thing that is affected is that the error
|
||
;; checking is a little less strict, and we really don't bother.
|
||
(if (and (memq (char-before) delims)
|
||
(progn (forward-char -1)
|
||
(setq saved (point))
|
||
(if (c-mode-is-new-awk-p)
|
||
(c-awk-backward-syntactic-ws)
|
||
(c-backward-syntactic-ws))
|
||
(or (memq (char-before) delims)
|
||
(memq (char-before) '(?: nil))
|
||
(eq (char-syntax (char-before)) ?\()
|
||
(and (c-mode-is-new-awk-p)
|
||
(c-awk-after-logical-semicolon))))) ; ACM 2002/6/22
|
||
;; ACM, 2002/7/20: What about giving a limit to the above function?
|
||
;; ACM, 2003/6/16: The above two lines (checking for
|
||
;; awk-logical-semicolon) are probably redundant after rewriting
|
||
;; c-awk-backward-syntactic-ws.
|
||
(setq ret 'previous
|
||
pos saved)
|
||
|
||
;; Begin at start and not pos to detect macros if we stand
|
||
;; directly after the #.
|
||
(goto-char start)
|
||
(if (looking-at "\\<\\|\\W")
|
||
;; Record this as the first token if not starting inside it.
|
||
(setq tok start))
|
||
|
||
;; The following while loop goes back one sexp (balanced parens,
|
||
;; etc. with contents, or symbol or suchlike) each iteration. This
|
||
;; movement is accomplished with a call to scan-sexps approx 130 lines
|
||
;; below.
|
||
(while
|
||
(catch 'loop ;; Throw nil to break, non-nil to continue.
|
||
(cond
|
||
;; Check for macro start. Take this out for AWK Mode (ACM, 2002/5/31)
|
||
;; NO!! just make sure macro-start is nil in AWK Mode (ACM, 2002/6/22)
|
||
;; It always is (ACM, 2002/6/23)
|
||
((save-excursion
|
||
(and macro-start
|
||
(progn (skip-chars-backward " \t")
|
||
(eq (char-before) ?#))
|
||
(progn (setq saved (1- (point)))
|
||
(beginning-of-line)
|
||
(not (eq (char-before (1- (point))) ?\\)))
|
||
(looking-at c-opt-cpp-start)
|
||
(progn (skip-chars-forward " \t")
|
||
(eq (point) saved))))
|
||
(goto-char saved)
|
||
(if (and (c-forward-to-cpp-define-body)
|
||
(progn (c-forward-syntactic-ws start)
|
||
(< (point) start)))
|
||
;; Stop at the first token in the content of the macro.
|
||
(setq pos (point)
|
||
ignore-labels t) ; Avoid the label check on exit.
|
||
(setq pos saved
|
||
ret 'macro
|
||
ignore-labels t))
|
||
(throw 'loop nil))
|
||
|
||
;; Do a round through the automaton if we've just passed a
|
||
;; statement boundary or passed a "while"-like token.
|
||
((or sym
|
||
(and (looking-at cond-key)
|
||
(setq sym (intern (match-string 1)))))
|
||
|
||
(when (and (< pos start) (null stack))
|
||
(throw 'loop nil))
|
||
|
||
;; The PDA state handling.
|
||
;;
|
||
;; Refer to the description of the PDA in the opening
|
||
;; comments. In the following OR form, the first leaf
|
||
;; attempts to handles one of the specific actions detailed
|
||
;; (e.g., finding token "if" whilst in state `else-boundary').
|
||
;; We drop through to the second leaf (which handles common
|
||
;; state) if no specific handler is found in the first cond.
|
||
;; If a parsing error is detected (e.g. an "else" with no
|
||
;; preceding "if"), we throw to the enclosing catch.
|
||
;;
|
||
;; Note that the (eq state 'else) means
|
||
;; "we've just passed an else", NOT "we're looking for an
|
||
;; else".
|
||
(or (cond
|
||
((eq state 'else)
|
||
(if (eq sym 'boundary)
|
||
(setq state 'else-boundary)
|
||
(c-bos-report-error)
|
||
(c-bos-pop-state-and-retry)))
|
||
|
||
((eq state 'else-boundary)
|
||
(cond ((eq sym 'if)
|
||
(c-bos-pop-state (setq ret 'beginning)))
|
||
((eq sym 'boundary)
|
||
(c-bos-report-error)
|
||
(c-bos-pop-state))))
|
||
|
||
((eq state 'while)
|
||
(if (and (eq sym 'boundary)
|
||
;; Since this can cause backtracking we do a
|
||
;; little more careful analysis to avoid it:
|
||
;; If there's a label in front of the while
|
||
;; it can't be part of a do-while.
|
||
(not after-labels-pos))
|
||
(progn (c-bos-save-pos)
|
||
(setq state 'while-boundary))
|
||
(c-bos-pop-state-and-retry))) ; Can't be a do-while
|
||
|
||
((eq state 'while-boundary)
|
||
(cond ((eq sym 'do)
|
||
(c-bos-pop-state (setq ret 'beginning)))
|
||
((eq sym 'boundary) ; isn't a do-while
|
||
(c-bos-restore-pos) ; the position of the while
|
||
(c-bos-pop-state)))) ; no longer searching for do.
|
||
|
||
((eq state 'catch)
|
||
(if (eq sym 'boundary)
|
||
(setq state 'catch-boundary)
|
||
(c-bos-report-error)
|
||
(c-bos-pop-state-and-retry)))
|
||
|
||
((eq state 'catch-boundary)
|
||
(cond
|
||
((eq sym 'try)
|
||
(c-bos-pop-state (setq ret 'beginning)))
|
||
((eq sym 'catch)
|
||
(setq state 'catch))
|
||
((eq sym 'boundary)
|
||
(c-bos-report-error)
|
||
(c-bos-pop-state)))))
|
||
|
||
;; This is state common. We get here when the previous
|
||
;; cond statement found no particular state handler.
|
||
(cond ((eq sym 'boundary)
|
||
;; If we have a boundary at the start
|
||
;; position we push a frame to go to the
|
||
;; previous statement.
|
||
(if (>= pos start)
|
||
(c-bos-push-state)
|
||
(c-bos-pop-state)))
|
||
((eq sym 'else)
|
||
(c-bos-push-state)
|
||
(c-bos-save-error-info 'if 'else)
|
||
(setq state 'else))
|
||
((eq sym 'while)
|
||
(when (or (not pptok)
|
||
(memq (char-after pptok) delims)
|
||
(and (c-mode-is-new-awk-p)
|
||
(or
|
||
;; might we be calling this from
|
||
;; c-awk-after-if-do-for-while-condition-p?
|
||
;; If so, avoid infinite recursion.
|
||
(and (eq (point) start)
|
||
(c-awk-NL-prop-not-set))
|
||
;; The following may recursively
|
||
;; call this function.
|
||
(c-awk-completed-stmt-ws-ends-line-p pptok))))
|
||
;; Since this can cause backtracking we do a
|
||
;; little more careful analysis to avoid it: If
|
||
;; the while isn't followed by a semicolon it
|
||
;; can't be a do-while.
|
||
;; ACM, 2002/5/31; IT CAN IN AWK Mode. ;-(
|
||
(c-bos-push-state)
|
||
(setq state 'while)))
|
||
((memq sym '(catch finally))
|
||
(c-bos-push-state)
|
||
(c-bos-save-error-info 'try sym)
|
||
(setq state 'catch))))
|
||
|
||
(when c-maybe-labelp
|
||
;; We're either past a statement boundary or at the
|
||
;; start of a statement, so throw away any label data
|
||
;; for the previous one.
|
||
(setq after-labels-pos nil
|
||
last-label-pos nil
|
||
c-maybe-labelp nil))))
|
||
|
||
;; Step to the previous sexp, but not if we crossed a
|
||
;; boundary, since that doesn't consume an sexp.
|
||
(if (eq sym 'boundary)
|
||
(setq ret 'previous)
|
||
|
||
;; HERE IS THE SINGLE PLACE INSIDE THE PDA LOOP WHERE WE MOVE
|
||
;; BACKWARDS THROUGH THE SOURCE. The following loop goes back
|
||
;; one sexp and then only loops in special circumstances (line
|
||
;; continuations and skipping past entire macros).
|
||
(while
|
||
(progn
|
||
(or (c-safe (goto-char (scan-sexps (point) -1)) t)
|
||
;; Give up if we hit an unbalanced block.
|
||
;; Since the stack won't be empty the code
|
||
;; below will report a suitable error.
|
||
(throw 'loop nil))
|
||
(cond ((looking-at "\\\\$")
|
||
;; Step again if we hit a line continuation.
|
||
t)
|
||
(macro-start
|
||
;; If we started inside a macro then this
|
||
;; sexp is always interesting.
|
||
nil)
|
||
((not (c-mode-is-new-awk-p)) ; Changed from t, ACM 2002/6/25
|
||
;; Otherwise check that we didn't step
|
||
;; into a macro from the end.
|
||
(let ((macro-start
|
||
(save-excursion
|
||
(and (c-beginning-of-macro)
|
||
(point)))))
|
||
(when macro-start
|
||
(goto-char macro-start)
|
||
t))))))
|
||
|
||
;; Did the last movement by a sexp cross a statement boundary?
|
||
(when (save-excursion
|
||
(if (if (eq (char-after) ?{)
|
||
(c-looking-at-inexpr-block lim nil)
|
||
(looking-at "\\s\("))
|
||
|
||
;; Should not include the paren sexp we've
|
||
;; passed over in the boundary check.
|
||
(if (> (point) (- pos 100))
|
||
(c-forward-sexp 1)
|
||
|
||
;; Find its end position this way instead of
|
||
;; moving forward if the sexp is large.
|
||
(goto-char pos)
|
||
(while
|
||
(progn
|
||
(goto-char (1+ (c-down-list-backward)))
|
||
(unless macro-start
|
||
;; Check that we didn't step into
|
||
;; a macro from the end.
|
||
(let ((macro-start
|
||
(save-excursion
|
||
(and (c-beginning-of-macro)
|
||
(point)))))
|
||
(when macro-start
|
||
(goto-char macro-start)
|
||
t)))))))
|
||
|
||
(setq boundary-pos (c-crosses-statement-barrier-p
|
||
(point) pos)))
|
||
|
||
(setq pptok ptok
|
||
ptok tok
|
||
tok boundary-pos
|
||
sym 'boundary)
|
||
(throw 'loop t))) ; like a C "continue". Analyze the next sexp.
|
||
|
||
(when (and (numberp c-maybe-labelp)
|
||
(not ignore-labels)
|
||
(not (looking-at "\\s\(")))
|
||
;; c-crosses-statement-barrier-p has found a colon, so
|
||
;; we might be in a label now.
|
||
(if (not after-labels-pos)
|
||
(setq after-labels-pos tok))
|
||
(setq last-label-pos tok
|
||
c-maybe-labelp t))
|
||
|
||
;; ObjC method def?
|
||
(when (and c-opt-method-key
|
||
(setq saved (c-in-method-def-p)))
|
||
(setq pos saved
|
||
ignore-labels t) ; Avoid the label check on exit.
|
||
(throw 'loop nil))
|
||
|
||
;; We've moved back by a sexp, so update the token positions.
|
||
(setq sym nil
|
||
pptok ptok
|
||
ptok tok
|
||
tok (point)
|
||
pos tok))) ; Not nil (for the while loop).
|
||
|
||
;; If the stack isn't empty there might be errors to report.
|
||
(while stack
|
||
(if (and (vectorp saved-pos) (eq (length saved-pos) 3))
|
||
(c-bos-report-error))
|
||
(setq saved-pos (cdr (car stack))
|
||
stack (cdr stack)))
|
||
|
||
(when (and (eq ret 'same)
|
||
(not (memq sym '(boundary ignore nil))))
|
||
;; Need to investigate closer whether we've crossed
|
||
;; between a substatement and its containing statement.
|
||
(if (setq saved (if (looking-at c-block-stmt-1-key)
|
||
ptok
|
||
pptok))
|
||
(cond ((> start saved) (setq pos saved))
|
||
((= start saved) (setq ret 'up)))))
|
||
|
||
(when (and c-maybe-labelp
|
||
(not ignore-labels)
|
||
(not (eq ret 'beginning))
|
||
after-labels-pos)
|
||
;; We're in a label. Maybe we should step to the statement
|
||
;; after it.
|
||
(if (< after-labels-pos start)
|
||
(setq pos after-labels-pos)
|
||
(setq ret 'label)
|
||
(if (< last-label-pos start)
|
||
(setq pos last-label-pos)))))
|
||
|
||
;; Skip over the unary operators that can start the statement.
|
||
(goto-char pos)
|
||
(while (progn
|
||
(if (c-mode-is-new-awk-p)
|
||
(c-awk-backward-syntactic-ws)
|
||
(c-backward-syntactic-ws))
|
||
(/= (skip-chars-backward "-+!*&~@`#") 0)) ; Hopefully the # won't hurt awk.
|
||
(setq pos (point)))
|
||
(goto-char pos)
|
||
ret)))
|
||
|
||
(defun c-crosses-statement-barrier-p (from to)
|
||
"Return non-nil if buffer positions FROM to TO cross one or more
|
||
statement or declaration boundaries. The returned value is actually
|
||
the position of the earliest boundary char. FROM must not be within
|
||
a string or comment.
|
||
|
||
The variable `c-maybe-labelp' is set to the position of the first `:' that
|
||
might start a label (i.e. not part of `::' and not preceded by `?'). If a
|
||
single `?' is found, then `c-maybe-labelp' is cleared."
|
||
(let ((skip-chars c-stmt-delim-chars)
|
||
lit-range)
|
||
(save-excursion
|
||
(catch 'done
|
||
(goto-char from)
|
||
(while (progn (skip-chars-forward skip-chars to)
|
||
(< (point) to))
|
||
(if (setq lit-range (c-literal-limits from)) ; Have we landed in a string/comment?
|
||
(progn (goto-char (setq from (cdr lit-range)))
|
||
(if (and (c-mode-is-new-awk-p) (bolp)) ; ACM 2002/7/17. Make sure we
|
||
(backward-char))) ; don't skip over a virtual semi-colon after an awk comment. :-(
|
||
(cond ((eq (char-after) ?:)
|
||
(forward-char)
|
||
(if (and (eq (char-after) ?:)
|
||
(< (point) to))
|
||
;; Ignore scope operators.
|
||
(forward-char)
|
||
(setq c-maybe-labelp (1- (point)))))
|
||
((eq (char-after) ??)
|
||
;; A question mark. Can't be a label, so stop
|
||
;; looking for more : and ?.
|
||
(setq c-maybe-labelp nil
|
||
skip-chars (substring c-stmt-delim-chars 0 -2)))
|
||
((and (eolp) ; Can only happen in AWK Mode
|
||
(not (c-awk-completed-stmt-ws-ends-line-p)))
|
||
(forward-char))
|
||
((and (c-mode-is-new-awk-p)
|
||
(bolp) lit-range ; awk: comment/string ended prev line.
|
||
(not (c-awk-completed-stmt-ws-ends-prev-line-p))))
|
||
(t (throw 'done (point))))))
|
||
nil))))
|
||
|
||
|
||
;; A set of functions that covers various idiosyncrasies in
|
||
;; implementations of `forward-comment'.
|
||
|
||
;; Note: Some emacsen considers incorrectly that any line comment
|
||
;; ending with a backslash continues to the next line. I can't think
|
||
;; of any way to work around that in a reliable way without changing
|
||
;; the buffer, though. Suggestions welcome. ;) (No, temporarily
|
||
;; changing the syntax for backslash doesn't work since we must treat
|
||
;; escapes in string literals correctly.)
|
||
|
||
(defun c-forward-single-comment ()
|
||
"Move forward past whitespace and the closest following comment, if any.
|
||
Return t if a comment was found, nil otherwise. In either case, the
|
||
point is moved past the following whitespace. Line continuations,
|
||
i.e. a backslashes followed by line breaks, are treated as whitespace.
|
||
The line breaks that end line comments are considered to be the
|
||
comment enders, so the point will be put on the beginning of the next
|
||
line if it moved past a line comment.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(let ((start (point)))
|
||
(when (looking-at "\\([ \t\n\r\f\v]\\|\\\\[\n\r]\\)+")
|
||
(goto-char (match-end 0)))
|
||
|
||
(when (forward-comment 1)
|
||
(if (eobp)
|
||
;; Some emacsen (e.g. XEmacs 21) return t when moving
|
||
;; forwards at eob.
|
||
nil
|
||
|
||
;; Emacs includes the ending newline in a b-style (c++)
|
||
;; comment, but XEmacs doesn't. We depend on the Emacs
|
||
;; behavior (which also is symmetric).
|
||
(if (and (eolp) (elt (parse-partial-sexp start (point)) 7))
|
||
(condition-case nil (forward-char 1)))
|
||
|
||
t))))
|
||
|
||
(defsubst c-forward-comments ()
|
||
"Move forward past all following whitespace and comments.
|
||
Line continuations, i.e. a backslashes followed by line breaks, are
|
||
treated as whitespace.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(while (or
|
||
;; If forward-comment in at least XEmacs 21 is given a large
|
||
;; positive value, it'll loop all the way through if it hits
|
||
;; eob.
|
||
(and (forward-comment 5)
|
||
;; Some emacsen (e.g. XEmacs 21) return t when moving
|
||
;; forwards at eob.
|
||
(not (eobp)))
|
||
|
||
(when (looking-at "\\\\[\n\r]")
|
||
(forward-char 2)
|
||
t))))
|
||
|
||
(defun c-backward-single-comment ()
|
||
"Move backward past whitespace and the closest preceding comment, if any.
|
||
Return t if a comment was found, nil otherwise. In either case, the
|
||
point is moved past the preceding whitespace. Line continuations,
|
||
i.e. a backslashes followed by line breaks, are treated as whitespace.
|
||
The line breaks that end line comments are considered to be the
|
||
comment enders, so the point cannot be at the end of the same line to
|
||
move over a line comment.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(let ((start (point)))
|
||
;; When we got newline terminated comments, forward-comment in all
|
||
;; supported emacsen so far will stop at eol of each line not
|
||
;; ending with a comment when moving backwards. This corrects for
|
||
;; that, and at the same time handles line continuations.
|
||
(while (progn
|
||
(skip-chars-backward " \t\n\r\f\v")
|
||
(and (looking-at "[\n\r]")
|
||
(eq (char-before) ?\\)
|
||
(< (point) start)))
|
||
(backward-char))
|
||
|
||
(if (bobp)
|
||
;; Some emacsen (e.g. Emacs 19.34) return t when moving
|
||
;; backwards at bob.
|
||
nil
|
||
|
||
;; Leave point after the closest following newline if we've
|
||
;; backed up over any above, since forward-comment won't move
|
||
;; backward over a line comment if point is at the end of the
|
||
;; same line.
|
||
(re-search-forward "\\=\\s *[\n\r]" start t)
|
||
|
||
(if (if (forward-comment -1)
|
||
(if (eolp)
|
||
;; If forward-comment above succeeded and we're at eol
|
||
;; then the newline we moved over above didn't end a
|
||
;; line comment, so we give it another go.
|
||
(forward-comment -1)
|
||
t))
|
||
|
||
;; Emacs <= 20 and XEmacs move back over the closer of a
|
||
;; block comment that lacks an opener.
|
||
(if (looking-at "\\*/")
|
||
(progn (forward-char 2) nil)
|
||
t)))))
|
||
|
||
(defsubst c-backward-comments ()
|
||
"Move backward past all preceding whitespace and comments.
|
||
Line continuations, i.e. a backslashes followed by line breaks, are
|
||
treated as whitespace. The line breaks that end line comments are
|
||
considered to be the comment enders, so the point cannot be at the end
|
||
of the same line to move over a line comment.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(let ((start (point)))
|
||
(while (and
|
||
;; `forward-comment' in some emacsen (e.g. Emacs 19.34)
|
||
;; return t when moving backwards at bob.
|
||
(not (bobp))
|
||
|
||
(if (forward-comment -1)
|
||
(if (looking-at "\\*/")
|
||
;; Emacs <= 20 and XEmacs move back over the
|
||
;; closer of a block comment that lacks an opener.
|
||
(progn (forward-char 2) nil)
|
||
t)
|
||
|
||
;; XEmacs treats line continuations as whitespace but
|
||
;; only in the backward direction, which seems a bit
|
||
;; odd. Anyway, this is necessary for Emacs.
|
||
(when (and (looking-at "[\n\r]")
|
||
(eq (char-before) ?\\)
|
||
(< (point) start))
|
||
(backward-char)
|
||
t))))))
|
||
|
||
|
||
;; Tools for skipping over syntactic whitespace.
|
||
|
||
;; The following functions use text properties to cache searches over
|
||
;; large regions of syntactic whitespace. It works as follows:
|
||
;;
|
||
;; o If a syntactic whitespace region contains anything but simple
|
||
;; whitespace (i.e. space, tab and line breaks), the text property
|
||
;; `c-in-sws' is put over it. At places where we have stopped
|
||
;; within that region there's also a `c-is-sws' text property.
|
||
;; That since there typically are nested whitespace inside that
|
||
;; must be handled separately, e.g. whitespace inside a comment or
|
||
;; cpp directive. Thus, from one point with `c-is-sws' it's safe
|
||
;; to jump to another point with that property within the same
|
||
;; `c-in-sws' region. It can be likened to a ladder where
|
||
;; `c-in-sws' marks the bars and `c-is-sws' the rungs.
|
||
;;
|
||
;; o The `c-is-sws' property is put on the simple whitespace chars at
|
||
;; a "rung position" and also maybe on the first following char.
|
||
;; As many characters as can be conveniently found in this range
|
||
;; are marked, but no assumption can be made that the whole range
|
||
;; is marked (it could be clobbered by later changes, for
|
||
;; instance).
|
||
;;
|
||
;; Note that some part of the beginning of a sequence of simple
|
||
;; whitespace might be part of the end of a preceding line comment
|
||
;; or cpp directive and must not be considered part of the "rung".
|
||
;; Such whitespace is some amount of horizontal whitespace followed
|
||
;; by a newline. In the case of cpp directives it could also be
|
||
;; two newlines with horizontal whitespace between them.
|
||
;;
|
||
;; The reason to include the first following char is to cope with
|
||
;; "rung positions" that doesn't have any ordinary whitespace. If
|
||
;; `c-is-sws' is put on a token character it does not have
|
||
;; `c-in-sws' set simultaneously. That's the only case when that
|
||
;; can occur, and the reason for not extending the `c-in-sws'
|
||
;; region to cover it is that the `c-in-sws' region could then be
|
||
;; accidentally merged with a following one if the token is only
|
||
;; one character long.
|
||
;;
|
||
;; o On buffer changes the `c-in-sws' and `c-is-sws' properties are
|
||
;; removed in the changed region. If the change was inside
|
||
;; syntactic whitespace that means that the "ladder" is broken, but
|
||
;; a later call to `c-forward-sws' or `c-backward-sws' will use the
|
||
;; parts on either side and use an ordinary search only to "repair"
|
||
;; the gap.
|
||
;;
|
||
;; Special care needs to be taken if a region is removed: If there
|
||
;; are `c-in-sws' on both sides of it which do not connect inside
|
||
;; the region then they can't be joined. If e.g. a marked macro is
|
||
;; broken, syntactic whitespace inside the new text might be
|
||
;; marked. If those marks would become connected with the old
|
||
;; `c-in-sws' range around the macro then we could get a ladder
|
||
;; with one end outside the macro and the other at some whitespace
|
||
;; within it.
|
||
;;
|
||
;; The main motivation for this system is to increase the speed in
|
||
;; skipping over the large whitespace regions that can occur at the
|
||
;; top level in e.g. header files that contain a lot of comments and
|
||
;; cpp directives. For small comments inside code it's probably
|
||
;; slower than using `forward-comment' straightforwardly, but speed is
|
||
;; not a significant factor there anyway.
|
||
|
||
; (defface c-debug-is-sws-face
|
||
; '((t (:background "GreenYellow")))
|
||
; "Debug face to mark the `c-is-sws' property.")
|
||
; (defface c-debug-in-sws-face
|
||
; '((t (:underline t)))
|
||
; "Debug face to mark the `c-in-sws' property.")
|
||
|
||
; (defun c-debug-put-sws-faces ()
|
||
; ;; Put the sws debug faces on all the `c-is-sws' and `c-in-sws'
|
||
; ;; properties in the buffer.
|
||
; (interactive)
|
||
; (save-excursion
|
||
; (let (in-face)
|
||
; (goto-char (point-min))
|
||
; (setq in-face (if (get-text-property (point) 'c-is-sws)
|
||
; (point)))
|
||
; (while (progn
|
||
; (goto-char (next-single-property-change
|
||
; (point) 'c-is-sws nil (point-max)))
|
||
; (if in-face
|
||
; (progn
|
||
; (c-debug-add-face in-face (point) 'c-debug-is-sws-face)
|
||
; (setq in-face nil))
|
||
; (setq in-face (point)))
|
||
; (not (eobp))))
|
||
; (goto-char (point-min))
|
||
; (setq in-face (if (get-text-property (point) 'c-in-sws)
|
||
; (point)))
|
||
; (while (progn
|
||
; (goto-char (next-single-property-change
|
||
; (point) 'c-in-sws nil (point-max)))
|
||
; (if in-face
|
||
; (progn
|
||
; (c-debug-add-face in-face (point) 'c-debug-in-sws-face)
|
||
; (setq in-face nil))
|
||
; (setq in-face (point)))
|
||
; (not (eobp)))))))
|
||
|
||
(defmacro c-debug-sws-msg (&rest args)
|
||
;;`(message ,@args)
|
||
)
|
||
|
||
(defmacro c-put-is-sws (beg end)
|
||
`(let ((beg ,beg) (end ,end))
|
||
(put-text-property beg end 'c-is-sws t)
|
||
,@(when (facep 'c-debug-is-sws-face)
|
||
`((c-debug-add-face beg end 'c-debug-is-sws-face)))))
|
||
|
||
(defmacro c-put-in-sws (beg end)
|
||
`(let ((beg ,beg) (end ,end))
|
||
(put-text-property beg end 'c-in-sws t)
|
||
,@(when (facep 'c-debug-is-sws-face)
|
||
`((c-debug-add-face beg end 'c-debug-in-sws-face)))))
|
||
|
||
(defmacro c-remove-is-sws (beg end)
|
||
`(let ((beg ,beg) (end ,end))
|
||
(remove-text-properties beg end '(c-is-sws nil))
|
||
,@(when (facep 'c-debug-is-sws-face)
|
||
`((c-debug-remove-face beg end 'c-debug-is-sws-face)))))
|
||
|
||
(defmacro c-remove-in-sws (beg end)
|
||
`(let ((beg ,beg) (end ,end))
|
||
(remove-text-properties beg end '(c-in-sws nil))
|
||
,@(when (facep 'c-debug-is-sws-face)
|
||
`((c-debug-remove-face beg end 'c-debug-in-sws-face)))))
|
||
|
||
(defmacro c-remove-is-and-in-sws (beg end)
|
||
`(let ((beg ,beg) (end ,end))
|
||
(remove-text-properties beg end '(c-is-sws nil c-in-sws nil))
|
||
,@(when (facep 'c-debug-is-sws-face)
|
||
`((c-debug-remove-face beg end 'c-debug-is-sws-face)
|
||
(c-debug-remove-face beg end 'c-debug-in-sws-face)))))
|
||
|
||
(defsubst c-invalidate-sws-region-after (beg end)
|
||
;; Called from `after-change-functions'. Note that if
|
||
;; `c-forward-sws' or `c-backward-sws' are used outside
|
||
;; `c-save-buffer-state' or similar then this will remove the cache
|
||
;; properties right after they're added.
|
||
|
||
(save-excursion
|
||
;; Adjust the end to remove the properties in any following simple
|
||
;; ws up to and including the next line break, if there is any
|
||
;; after the changed region. This is necessary e.g. when a rung
|
||
;; marked empty line is converted to a line comment by inserting
|
||
;; "//" before the line break. In that case the line break would
|
||
;; keep the rung mark which could make a later `c-backward-sws'
|
||
;; move into the line comment instead of over it.
|
||
(goto-char end)
|
||
(skip-chars-forward " \t\f\v")
|
||
(when (and (eolp) (not (eobp)))
|
||
(setq end (1+ (point)))))
|
||
|
||
(when (and (= beg end)
|
||
(get-text-property beg 'c-in-sws)
|
||
(> beg (point-min))
|
||
(get-text-property (1- beg) 'c-in-sws))
|
||
;; Ensure that an `c-in-sws' range gets broken. Note that it isn't
|
||
;; safe to keep a range that was continuous before the change. E.g:
|
||
;;
|
||
;; #define foo
|
||
;; \
|
||
;; bar
|
||
;;
|
||
;; There can be a "ladder" between "#" and "b". Now, if the newline
|
||
;; after "foo" is removed then "bar" will become part of the cpp
|
||
;; directive instead of a syntactically relevant token. In that
|
||
;; case there's no longer syntactic ws from "#" to "b".
|
||
(setq beg (1- beg)))
|
||
|
||
(c-debug-sws-msg "c-invalidate-sws-region-after [%s..%s]" beg end)
|
||
(c-remove-is-and-in-sws beg end))
|
||
|
||
(defun c-forward-sws ()
|
||
;; Used by `c-forward-syntactic-ws' to implement the unbounded search.
|
||
|
||
(let (;; `rung-pos' is set to a position as early as possible in the
|
||
;; unmarked part of the simple ws region.
|
||
(rung-pos (point)) next-rung-pos rung-end-pos last-put-in-sws-pos
|
||
rung-is-marked next-rung-is-marked simple-ws-end
|
||
;; `safe-start' is set when it's safe to cache the start position.
|
||
;; It's not set if we've initially skipped over comments and line
|
||
;; continuations since we might have gone out through the end of a
|
||
;; macro then. This provision makes `c-forward-sws' not populate the
|
||
;; cache in the majority of cases, but otoh is `c-backward-sws' by far
|
||
;; more common.
|
||
safe-start)
|
||
|
||
;; Skip simple ws and do a quick check on the following character to see
|
||
;; if it's anything that can't start syntactic ws, so we can bail out
|
||
;; early in the majority of cases when there just are a few ws chars.
|
||
(skip-chars-forward " \t\n\r\f\v")
|
||
(when (looking-at c-syntactic-ws-start)
|
||
|
||
(setq rung-end-pos (min (1+ (point)) (point-max)))
|
||
(if (setq rung-is-marked (text-property-any rung-pos rung-end-pos
|
||
'c-is-sws t))
|
||
;; Find the last rung position to avoid setting properties in all
|
||
;; the cases when the marked rung is complete.
|
||
;; (`next-single-property-change' is certain to move at least one
|
||
;; step forward.)
|
||
(setq rung-pos (1- (next-single-property-change
|
||
rung-is-marked 'c-is-sws nil rung-end-pos)))
|
||
;; Got no marked rung here. Since the simple ws might have started
|
||
;; inside a line comment or cpp directive we must set `rung-pos' as
|
||
;; high as possible.
|
||
(setq rung-pos (point)))
|
||
|
||
(while
|
||
(progn
|
||
(while
|
||
(when (and rung-is-marked
|
||
(get-text-property (point) 'c-in-sws))
|
||
|
||
;; The following search is the main reason that `c-in-sws'
|
||
;; and `c-is-sws' aren't combined to one property.
|
||
(goto-char (next-single-property-change
|
||
(point) 'c-in-sws nil (point-max)))
|
||
(unless (get-text-property (point) 'c-is-sws)
|
||
;; If the `c-in-sws' region extended past the last
|
||
;; `c-is-sws' char we have to go back a bit.
|
||
(or (get-text-property (1- (point)) 'c-is-sws)
|
||
(goto-char (previous-single-property-change
|
||
(point) 'c-is-sws)))
|
||
(backward-char))
|
||
|
||
(c-debug-sws-msg
|
||
"c-forward-sws cached move %s -> %s (max %s)"
|
||
rung-pos (point) (point-max))
|
||
|
||
(setq rung-pos (point))
|
||
(and (> (skip-chars-forward " \t\n\r\f\v") 0)
|
||
(not (eobp))))
|
||
|
||
;; We'll loop here if there is simple ws after the last rung.
|
||
;; That means that there's been some change in it and it's
|
||
;; possible that we've stepped into another ladder, so extend
|
||
;; the previous one to join with it if there is one, and try to
|
||
;; use the cache again.
|
||
(c-debug-sws-msg
|
||
"c-forward-sws extending rung with [%s..%s] (max %s)"
|
||
(1+ rung-pos) (1+ (point)) (point-max))
|
||
(unless (get-text-property (point) 'c-is-sws)
|
||
;; Remove any `c-in-sws' property from the last char of
|
||
;; the rung before we mark it with `c-is-sws', so that we
|
||
;; won't connect with the remains of a broken "ladder".
|
||
(c-remove-in-sws (point) (1+ (point))))
|
||
(c-put-is-sws (1+ rung-pos)
|
||
(1+ (point)))
|
||
(c-put-in-sws rung-pos
|
||
(setq rung-pos (point)
|
||
last-put-in-sws-pos rung-pos)))
|
||
|
||
(setq simple-ws-end (point))
|
||
(c-forward-comments)
|
||
|
||
(cond
|
||
((/= (point) simple-ws-end)
|
||
;; Skipped over comments. Don't cache at eob in case the buffer
|
||
;; is narrowed.
|
||
(not (eobp)))
|
||
|
||
((save-excursion
|
||
(and c-opt-cpp-prefix
|
||
(looking-at c-opt-cpp-start)
|
||
(progn (skip-chars-backward " \t")
|
||
(bolp))
|
||
(or (bobp)
|
||
(progn (backward-char)
|
||
(not (eq (char-before) ?\\))))))
|
||
;; Skip a preprocessor directive.
|
||
(end-of-line)
|
||
(while (and (eq (char-before) ?\\)
|
||
(= (forward-line 1) 0))
|
||
(end-of-line))
|
||
(forward-line 1)
|
||
(setq safe-start t)
|
||
;; Don't cache at eob in case the buffer is narrowed.
|
||
(not (eobp)))))
|
||
|
||
;; We've searched over a piece of non-white syntactic ws. See if this
|
||
;; can be cached.
|
||
(setq next-rung-pos (point))
|
||
(skip-chars-forward " \t\n\r\f\v")
|
||
(setq rung-end-pos (min (1+ (point)) (point-max)))
|
||
|
||
(if (or
|
||
;; Cache if we haven't skipped comments only, and if we started
|
||
;; either from a marked rung or from a completely uncached
|
||
;; position.
|
||
(and safe-start
|
||
(or rung-is-marked
|
||
(not (get-text-property simple-ws-end 'c-in-sws))))
|
||
|
||
;; See if there's a marked rung in the encountered simple ws. If
|
||
;; so then we can cache, unless `safe-start' is nil. Even then
|
||
;; we need to do this to check if the cache can be used for the
|
||
;; next step.
|
||
(and (setq next-rung-is-marked
|
||
(text-property-any next-rung-pos rung-end-pos
|
||
'c-is-sws t))
|
||
safe-start))
|
||
|
||
(progn
|
||
(c-debug-sws-msg
|
||
"c-forward-sws caching [%s..%s] - [%s..%s] (max %s)"
|
||
rung-pos (1+ simple-ws-end) next-rung-pos rung-end-pos
|
||
(point-max))
|
||
|
||
;; Remove the properties for any nested ws that might be cached.
|
||
;; Only necessary for `c-is-sws' since `c-in-sws' will be set
|
||
;; anyway.
|
||
(c-remove-is-sws (1+ simple-ws-end) next-rung-pos)
|
||
(unless (and rung-is-marked (= rung-pos simple-ws-end))
|
||
(c-put-is-sws rung-pos
|
||
(1+ simple-ws-end))
|
||
(setq rung-is-marked t))
|
||
(c-put-in-sws rung-pos
|
||
(setq rung-pos (point)
|
||
last-put-in-sws-pos rung-pos))
|
||
(unless (get-text-property (1- rung-end-pos) 'c-is-sws)
|
||
;; Remove any `c-in-sws' property from the last char of
|
||
;; the rung before we mark it with `c-is-sws', so that we
|
||
;; won't connect with the remains of a broken "ladder".
|
||
(c-remove-in-sws (1- rung-end-pos) rung-end-pos))
|
||
(c-put-is-sws next-rung-pos
|
||
rung-end-pos))
|
||
|
||
(c-debug-sws-msg
|
||
"c-forward-sws not caching [%s..%s] - [%s..%s] (max %s)"
|
||
rung-pos (1+ simple-ws-end) next-rung-pos rung-end-pos
|
||
(point-max))
|
||
|
||
;; Set `rung-pos' for the next rung. It's the same thing here as
|
||
;; initially, except that the rung position is set as early as
|
||
;; possible since we can't be in the ending ws of a line comment or
|
||
;; cpp directive now.
|
||
(if (setq rung-is-marked next-rung-is-marked)
|
||
(setq rung-pos (1- (next-single-property-change
|
||
rung-is-marked 'c-is-sws nil rung-end-pos)))
|
||
(setq rung-pos next-rung-pos))
|
||
(setq safe-start t)))
|
||
|
||
;; Make sure that the newly marked `c-in-sws' region doesn't connect to
|
||
;; another one after the point (which might occur when editing inside a
|
||
;; comment or macro).
|
||
(when (eq last-put-in-sws-pos (point))
|
||
(cond ((< last-put-in-sws-pos (point-max))
|
||
(c-debug-sws-msg
|
||
"c-forward-sws clearing at %s for cache separation"
|
||
last-put-in-sws-pos)
|
||
(c-remove-in-sws last-put-in-sws-pos
|
||
(1+ last-put-in-sws-pos)))
|
||
(t
|
||
;; If at eob we have to clear the last character before the end
|
||
;; instead since the buffer might be narrowed and there might
|
||
;; be a `c-in-sws' after (point-max). In this case it's
|
||
;; necessary to clear both properties.
|
||
(c-debug-sws-msg
|
||
"c-forward-sws clearing thoroughly at %s for cache separation"
|
||
(1- last-put-in-sws-pos))
|
||
(c-remove-is-and-in-sws (1- last-put-in-sws-pos)
|
||
last-put-in-sws-pos))))
|
||
)))
|
||
|
||
(defun c-backward-sws ()
|
||
;; Used by `c-backward-syntactic-ws' to implement the unbounded search.
|
||
|
||
(let (;; `rung-pos' is set to a position as late as possible in the unmarked
|
||
;; part of the simple ws region.
|
||
(rung-pos (point)) next-rung-pos last-put-in-sws-pos
|
||
rung-is-marked simple-ws-beg cmt-skip-pos)
|
||
|
||
;; Skip simple horizontal ws and do a quick check on the preceding
|
||
;; character to see if it's anying that can't end syntactic ws, so we can
|
||
;; bail out early in the majority of cases when there just are a few ws
|
||
;; chars. Newlines are complicated in the backward direction, so we can't
|
||
;; skip over them.
|
||
(skip-chars-backward " \t\f")
|
||
(when (and (not (bobp))
|
||
(save-excursion
|
||
(backward-char)
|
||
(looking-at c-syntactic-ws-end)))
|
||
|
||
;; Try to find a rung position in the simple ws preceding point, so that
|
||
;; we can get a cache hit even if the last bit of the simple ws has
|
||
;; changed recently.
|
||
(setq simple-ws-beg (point))
|
||
(skip-chars-backward " \t\n\r\f\v")
|
||
(if (setq rung-is-marked (text-property-any
|
||
(point) (min (1+ rung-pos) (point-max))
|
||
'c-is-sws t))
|
||
;; `rung-pos' will be the earliest marked position, which means that
|
||
;; there might be later unmarked parts in the simple ws region.
|
||
;; It's not worth the effort to fix that; the last part of the
|
||
;; simple ws is also typically edited often, so it could be wasted.
|
||
(goto-char (setq rung-pos rung-is-marked))
|
||
(goto-char simple-ws-beg))
|
||
|
||
(while
|
||
(progn
|
||
(while
|
||
(when (and rung-is-marked
|
||
(not (bobp))
|
||
(get-text-property (1- (point)) 'c-in-sws))
|
||
|
||
;; The following search is the main reason that `c-in-sws'
|
||
;; and `c-is-sws' aren't combined to one property.
|
||
(goto-char (previous-single-property-change
|
||
(point) 'c-in-sws nil (point-min)))
|
||
(unless (get-text-property (point) 'c-is-sws)
|
||
;; If the `c-in-sws' region extended past the first
|
||
;; `c-is-sws' char we have to go forward a bit.
|
||
(goto-char (next-single-property-change
|
||
(point) 'c-is-sws)))
|
||
|
||
(c-debug-sws-msg
|
||
"c-backward-sws cached move %s <- %s (min %s)"
|
||
(point) rung-pos (point-min))
|
||
|
||
(setq rung-pos (point))
|
||
(if (and (< (min (skip-chars-backward " \t\f\v")
|
||
(progn
|
||
(setq simple-ws-beg (point))
|
||
(skip-chars-backward " \t\n\r\f\v")))
|
||
0)
|
||
(setq rung-is-marked
|
||
(text-property-any (point) rung-pos
|
||
'c-is-sws t)))
|
||
t
|
||
(goto-char simple-ws-beg)
|
||
nil))
|
||
|
||
;; We'll loop here if there is simple ws before the first rung.
|
||
;; That means that there's been some change in it and it's
|
||
;; possible that we've stepped into another ladder, so extend
|
||
;; the previous one to join with it if there is one, and try to
|
||
;; use the cache again.
|
||
(c-debug-sws-msg
|
||
"c-backward-sws extending rung with [%s..%s] (min %s)"
|
||
rung-is-marked rung-pos (point-min))
|
||
(unless (get-text-property (1- rung-pos) 'c-is-sws)
|
||
;; Remove any `c-in-sws' property from the last char of
|
||
;; the rung before we mark it with `c-is-sws', so that we
|
||
;; won't connect with the remains of a broken "ladder".
|
||
(c-remove-in-sws (1- rung-pos) rung-pos))
|
||
(c-put-is-sws rung-is-marked
|
||
rung-pos)
|
||
(c-put-in-sws rung-is-marked
|
||
(1- rung-pos))
|
||
(setq rung-pos rung-is-marked
|
||
last-put-in-sws-pos rung-pos))
|
||
|
||
(c-backward-comments)
|
||
(setq cmt-skip-pos (point))
|
||
|
||
(cond
|
||
((and c-opt-cpp-prefix
|
||
(/= cmt-skip-pos simple-ws-beg)
|
||
(c-beginning-of-macro))
|
||
;; Inside a cpp directive. See if it should be skipped over.
|
||
(let ((cpp-beg (point)))
|
||
|
||
;; Move back over all line continuations in the region skipped
|
||
;; over by `c-backward-comments'. If we go past it then we
|
||
;; started inside the cpp directive.
|
||
(goto-char simple-ws-beg)
|
||
(beginning-of-line)
|
||
(while (and (> (point) cmt-skip-pos)
|
||
(progn (backward-char)
|
||
(eq (char-before) ?\\)))
|
||
(beginning-of-line))
|
||
|
||
(if (< (point) cmt-skip-pos)
|
||
;; Don't move past the cpp directive if we began inside
|
||
;; it. Note that the position at the end of the last line
|
||
;; of the macro is also considered to be within it.
|
||
(progn (goto-char cmt-skip-pos)
|
||
nil)
|
||
|
||
;; It's worthwhile to spend a little bit of effort on finding
|
||
;; the end of the macro, to get a good `simple-ws-beg'
|
||
;; position for the cache. Note that `c-backward-comments'
|
||
;; could have stepped over some comments before going into
|
||
;; the macro, and then `simple-ws-beg' must be kept on the
|
||
;; same side of those comments.
|
||
(goto-char simple-ws-beg)
|
||
(skip-chars-backward " \t\n\r\f\v")
|
||
(if (eq (char-before) ?\\)
|
||
(forward-char))
|
||
(forward-line 1)
|
||
(if (< (point) simple-ws-beg)
|
||
;; Might happen if comments after the macro were skipped
|
||
;; over.
|
||
(setq simple-ws-beg (point)))
|
||
|
||
(goto-char cpp-beg)
|
||
t)))
|
||
|
||
((/= (save-excursion
|
||
(skip-chars-forward " \t\n\r\f\v" simple-ws-beg)
|
||
(setq next-rung-pos (point)))
|
||
simple-ws-beg)
|
||
;; Skipped over comments. Must put point at the end of
|
||
;; the simple ws at point since we might be after a line
|
||
;; comment or cpp directive that's been partially
|
||
;; narrowed out, and we can't risk marking the simple ws
|
||
;; at the end of it.
|
||
(goto-char next-rung-pos)
|
||
t)))
|
||
|
||
;; We've searched over a piece of non-white syntactic ws. See if this
|
||
;; can be cached.
|
||
(setq next-rung-pos (point))
|
||
(skip-chars-backward " \t\f\v")
|
||
|
||
(if (or
|
||
;; Cache if we started either from a marked rung or from a
|
||
;; completely uncached position.
|
||
rung-is-marked
|
||
(not (get-text-property (1- simple-ws-beg) 'c-in-sws))
|
||
|
||
;; Cache if there's a marked rung in the encountered simple ws.
|
||
(save-excursion
|
||
(skip-chars-backward " \t\n\r\f\v")
|
||
(text-property-any (point) (min (1+ next-rung-pos) (point-max))
|
||
'c-is-sws t)))
|
||
|
||
(progn
|
||
(c-debug-sws-msg
|
||
"c-backward-sws caching [%s..%s] - [%s..%s] (min %s)"
|
||
(point) (1+ next-rung-pos)
|
||
simple-ws-beg (min (1+ rung-pos) (point-max))
|
||
(point-min))
|
||
|
||
;; Remove the properties for any nested ws that might be cached.
|
||
;; Only necessary for `c-is-sws' since `c-in-sws' will be set
|
||
;; anyway.
|
||
(c-remove-is-sws (1+ next-rung-pos) simple-ws-beg)
|
||
(unless (and rung-is-marked (= simple-ws-beg rung-pos))
|
||
(let ((rung-end-pos (min (1+ rung-pos) (point-max))))
|
||
(unless (get-text-property (1- rung-end-pos) 'c-is-sws)
|
||
;; Remove any `c-in-sws' property from the last char of
|
||
;; the rung before we mark it with `c-is-sws', so that we
|
||
;; won't connect with the remains of a broken "ladder".
|
||
(c-remove-in-sws (1- rung-end-pos) rung-end-pos))
|
||
(c-put-is-sws simple-ws-beg
|
||
rung-end-pos)
|
||
(setq rung-is-marked t)))
|
||
(c-put-in-sws (setq simple-ws-beg (point)
|
||
last-put-in-sws-pos simple-ws-beg)
|
||
rung-pos)
|
||
(c-put-is-sws (setq rung-pos simple-ws-beg)
|
||
(1+ next-rung-pos)))
|
||
|
||
(c-debug-sws-msg
|
||
"c-backward-sws not caching [%s..%s] - [%s..%s] (min %s)"
|
||
(point) (1+ next-rung-pos)
|
||
simple-ws-beg (min (1+ rung-pos) (point-max))
|
||
(point-min))
|
||
(setq rung-pos next-rung-pos
|
||
simple-ws-beg (point))
|
||
))
|
||
|
||
;; Make sure that the newly marked `c-in-sws' region doesn't connect to
|
||
;; another one before the point (which might occur when editing inside a
|
||
;; comment or macro).
|
||
(when (eq last-put-in-sws-pos (point))
|
||
(cond ((< (point-min) last-put-in-sws-pos)
|
||
(c-debug-sws-msg
|
||
"c-backward-sws clearing at %s for cache separation"
|
||
(1- last-put-in-sws-pos))
|
||
(c-remove-in-sws (1- last-put-in-sws-pos)
|
||
last-put-in-sws-pos))
|
||
((> (point-min) 1)
|
||
;; If at bob and the buffer is narrowed, we have to clear the
|
||
;; character we're standing on instead since there might be a
|
||
;; `c-in-sws' before (point-min). In this case it's necessary
|
||
;; to clear both properties.
|
||
(c-debug-sws-msg
|
||
"c-backward-sws clearing thoroughly at %s for cache separation"
|
||
last-put-in-sws-pos)
|
||
(c-remove-is-and-in-sws last-put-in-sws-pos
|
||
(1+ last-put-in-sws-pos)))))
|
||
)))
|
||
|
||
|
||
;; A system for handling noteworthy parens before the point.
|
||
|
||
(defvar c-state-cache nil)
|
||
(make-variable-buffer-local 'c-state-cache)
|
||
;; The state cache used by `c-parse-state' to cut down the amount of
|
||
;; searching. It's the result from some earlier `c-parse-state' call.
|
||
;; The use of the cached info is more effective if the next
|
||
;; `c-parse-state' call is on a line close by the one the cached state
|
||
;; was made at; the cache can actually slow down a little if the
|
||
;; cached state was made very far back in the buffer. The cache is
|
||
;; most effective if `c-parse-state' is used on each line while moving
|
||
;; forward.
|
||
|
||
(defvar c-state-cache-start 1)
|
||
(make-variable-buffer-local 'c-state-cache-start)
|
||
;; This is (point-min) when `c-state-cache' was calculated, since a
|
||
;; change of narrowing is likely to affect the parens that are visible
|
||
;; before the point.
|
||
|
||
(defsubst c-invalidate-state-cache (pos)
|
||
;; Invalidate all info on `c-state-cache' that applies to the buffer
|
||
;; at POS or higher. This is much like `c-whack-state-after', but
|
||
;; it never changes a paren pair element into an open paren element.
|
||
;; Doing that would mean that the new open paren wouldn't have the
|
||
;; required preceding paren pair element.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(while (and c-state-cache
|
||
(let ((elem (car c-state-cache)))
|
||
(if (consp elem)
|
||
(or (<= pos (car elem))
|
||
(< pos (cdr elem)))
|
||
(<= pos elem))))
|
||
(setq c-state-cache (cdr c-state-cache))))
|
||
|
||
(defun c-parse-state ()
|
||
;; Finds and records all noteworthy parens between some good point
|
||
;; earlier in the file and point. That good point is at least the
|
||
;; beginning of the top-level construct we are in, or the beginning
|
||
;; of the preceding top-level construct if we aren't in one.
|
||
;;
|
||
;; The returned value is a list of the noteworthy parens with the
|
||
;; last one first. If an element in the list is an integer, it's
|
||
;; the position of an open paren which has not been closed before
|
||
;; the point. If an element is a cons, it gives the position of a
|
||
;; closed brace paren pair; the car is the start paren position and
|
||
;; the cdr is the position following the closing paren. Only the
|
||
;; last closed brace paren pair before each open paren is recorded,
|
||
;; and thus the state never contains two cons elements in
|
||
;; succession.
|
||
;;
|
||
;; Currently no characters which are given paren syntax with the
|
||
;; syntax-table property are recorded, i.e. angle bracket arglist
|
||
;; parens are never present here. Note that this might change.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
|
||
(save-restriction
|
||
(let* ((here (point))
|
||
(c-macro-start (c-query-macro-start))
|
||
(in-macro-start (or c-macro-start (point)))
|
||
old-state last-pos pairs pos save-pos)
|
||
(c-invalidate-state-cache (point))
|
||
|
||
;; If the minimum position has changed due to narrowing then we
|
||
;; have to fix the tail of `c-state-cache' accordingly.
|
||
(unless (= c-state-cache-start (point-min))
|
||
(if (> (point-min) c-state-cache-start)
|
||
;; If point-min has moved forward then we just need to cut
|
||
;; off a bit of the tail.
|
||
(let ((ptr (cons nil c-state-cache)) elem)
|
||
(while (and (setq elem (car-safe (cdr ptr)))
|
||
(>= (if (consp elem) (car elem) elem)
|
||
(point-min)))
|
||
(setq ptr (cdr ptr)))
|
||
(when (consp ptr)
|
||
(if (eq (cdr ptr) c-state-cache)
|
||
(setq c-state-cache nil)
|
||
(setcdr ptr nil))))
|
||
;; If point-min has moved backward then we drop the state
|
||
;; completely. It's possible to do a better job here and
|
||
;; recalculate the top only.
|
||
(setq c-state-cache nil))
|
||
(setq c-state-cache-start (point-min)))
|
||
|
||
;; Get the latest position we know are directly inside the
|
||
;; closest containing paren of the cached state.
|
||
(setq last-pos (and c-state-cache
|
||
(if (consp (car c-state-cache))
|
||
(cdr (car c-state-cache))
|
||
(1+ (car c-state-cache)))))
|
||
|
||
;; Check if the found last-pos is in a macro. If it is, and
|
||
;; we're not in the same macro, we must discard everything on
|
||
;; c-state-cache that is inside the macro before using it.
|
||
(when last-pos
|
||
(save-excursion
|
||
(goto-char last-pos)
|
||
(when (and (c-beginning-of-macro)
|
||
(/= (point) in-macro-start))
|
||
(c-invalidate-state-cache (point))
|
||
;; Set last-pos again, just like above.
|
||
(setq last-pos (and c-state-cache
|
||
(if (consp (car c-state-cache))
|
||
(cdr (car c-state-cache))
|
||
(1+ (car c-state-cache))))))))
|
||
|
||
(setq pos
|
||
;; Find the start position for the forward search. (Can't
|
||
;; search in the backward direction since point might be
|
||
;; in some kind of literal.)
|
||
(or (when last-pos
|
||
|
||
;; There's a cached state with a containing paren. Pop
|
||
;; off the stale containing sexps from it by going
|
||
;; forward out of parens as far as possible.
|
||
(narrow-to-region (point-min) here)
|
||
(let (placeholder pair-beg)
|
||
(while (and c-state-cache
|
||
(setq placeholder
|
||
(c-up-list-forward last-pos)))
|
||
(setq last-pos placeholder)
|
||
(if (consp (car c-state-cache))
|
||
(setq pair-beg (car-safe (cdr c-state-cache))
|
||
c-state-cache (cdr-safe (cdr c-state-cache)))
|
||
(setq pair-beg (car c-state-cache)
|
||
c-state-cache (cdr c-state-cache))))
|
||
|
||
(when (and pair-beg (eq (char-after pair-beg) ?{))
|
||
;; The last paren pair we moved out from was a brace
|
||
;; pair. Modify the state to record this as a closed
|
||
;; pair now.
|
||
(if (consp (car-safe c-state-cache))
|
||
(setq c-state-cache (cdr c-state-cache)))
|
||
(setq c-state-cache (cons (cons pair-beg last-pos)
|
||
c-state-cache))))
|
||
|
||
;; Check if the preceding balanced paren is within a
|
||
;; macro; it should be ignored if we're outside the
|
||
;; macro. There's no need to check any further upwards;
|
||
;; if the macro contains an unbalanced opening paren then
|
||
;; we're smoked anyway.
|
||
(when (and (<= (point) in-macro-start)
|
||
(consp (car c-state-cache)))
|
||
(save-excursion
|
||
(goto-char (car (car c-state-cache)))
|
||
(when (c-beginning-of-macro)
|
||
(setq here (point)
|
||
c-state-cache (cdr c-state-cache)))))
|
||
|
||
(when c-state-cache
|
||
(setq old-state c-state-cache)
|
||
last-pos))
|
||
|
||
(save-excursion
|
||
;; go back 2 bods, but ignore any bogus positions
|
||
;; returned by beginning-of-defun (i.e. open paren in
|
||
;; column zero)
|
||
(goto-char here)
|
||
(let ((cnt 2))
|
||
(while (not (or (bobp) (zerop cnt)))
|
||
(c-beginning-of-defun-1)
|
||
(if (eq (char-after) ?\{)
|
||
(setq cnt (1- cnt)))))
|
||
(point))))
|
||
|
||
(narrow-to-region (point-min) here)
|
||
|
||
(while pos
|
||
;; Find the balanced brace pairs.
|
||
(setq save-pos pos
|
||
pairs nil)
|
||
(while (and (setq last-pos (c-down-list-forward pos))
|
||
(setq pos (c-up-list-forward last-pos)))
|
||
(if (eq (char-before last-pos) ?{)
|
||
(setq pairs (cons (cons last-pos pos) pairs))))
|
||
|
||
;; Should ignore any pairs that are in a macro, providing
|
||
;; we're not in the same one.
|
||
(when (and pairs (< (car (car pairs)) in-macro-start))
|
||
(while (and (save-excursion
|
||
(goto-char (car (car pairs)))
|
||
(c-beginning-of-macro))
|
||
(setq pairs (cdr pairs)))))
|
||
|
||
;; Record the last brace pair.
|
||
(when pairs
|
||
(if (and (eq c-state-cache old-state)
|
||
(consp (car-safe c-state-cache)))
|
||
;; There's a closed pair on the cached state but we've
|
||
;; found a later one, so remove it.
|
||
(setq c-state-cache (cdr c-state-cache)))
|
||
(setq pairs (car pairs))
|
||
(setcar pairs (1- (car pairs)))
|
||
(when (consp (car-safe c-state-cache))
|
||
;; There could already be a cons first in `c-state-cache'
|
||
;; if we've e.g. jumped over an unbalanced open paren in a
|
||
;; macro below.
|
||
(setq c-state-cache (cdr c-state-cache)))
|
||
(setq c-state-cache (cons pairs c-state-cache)))
|
||
|
||
(if last-pos
|
||
;; Prepare to loop, but record the open paren only if it's
|
||
;; outside a macro or within the same macro as point, and
|
||
;; if it is a legitimate open paren and not some character
|
||
;; that got an open paren syntax-table property.
|
||
(progn
|
||
(setq pos last-pos)
|
||
(if (and (or (>= last-pos in-macro-start)
|
||
(save-excursion
|
||
(goto-char last-pos)
|
||
(not (c-beginning-of-macro))))
|
||
;; Check for known types of parens that we want
|
||
;; to record. The syntax table is not to be
|
||
;; trusted here since the caller might be using
|
||
;; e.g. `c++-template-syntax-table'.
|
||
(memq (char-before last-pos) '(?{ ?\( ?\[)))
|
||
(setq c-state-cache (cons (1- last-pos) c-state-cache))))
|
||
|
||
(if (setq last-pos (c-up-list-forward pos))
|
||
;; Found a close paren without a corresponding opening
|
||
;; one. Maybe we didn't go back far enough, so try to
|
||
;; scan backward for the start paren and then start over.
|
||
(progn
|
||
(setq pos (c-up-list-backward pos)
|
||
c-state-cache nil)
|
||
(when (or (not pos)
|
||
;; Emacs (up to at least 21.2) can get confused by
|
||
;; open parens in column zero inside comments: The
|
||
;; sexp functions can then misbehave and bring us
|
||
;; back to the same point again. Check this so that
|
||
;; we don't get an infinite loop.
|
||
(>= pos save-pos))
|
||
(setq pos last-pos
|
||
c-parsing-error
|
||
(format "Unbalanced close paren at line %d"
|
||
(1+ (count-lines (point-min)
|
||
(c-point 'bol last-pos)))))))
|
||
(setq pos nil))))
|
||
|
||
c-state-cache)))
|
||
|
||
;; Debug tool to catch cache inconsistencies.
|
||
(defvar c-debug-parse-state nil)
|
||
(unless (fboundp 'c-real-parse-state)
|
||
(fset 'c-real-parse-state (symbol-function 'c-parse-state)))
|
||
(cc-bytecomp-defun c-real-parse-state)
|
||
(defun c-debug-parse-state ()
|
||
(let ((res1 (c-real-parse-state)) res2)
|
||
(let ((c-state-cache nil))
|
||
(setq res2 (c-real-parse-state)))
|
||
(unless (equal res1 res2)
|
||
(error "c-parse-state inconsistency: using cache: %s, from scratch: %s"
|
||
res1 res2))
|
||
res1))
|
||
(defun c-toggle-parse-state-debug (&optional arg)
|
||
(interactive "P")
|
||
(setq c-debug-parse-state (c-calculate-state arg c-debug-parse-state))
|
||
(fset 'c-parse-state (symbol-function (if c-debug-parse-state
|
||
'c-debug-parse-state
|
||
'c-real-parse-state)))
|
||
(c-keep-region-active))
|
||
|
||
(defun c-whack-state-before (bufpos paren-state)
|
||
;; Whack off any state information from PAREN-STATE which lies
|
||
;; before BUFPOS. Not destructive on PAREN-STATE.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(let* ((newstate (list nil))
|
||
(ptr newstate)
|
||
car)
|
||
(while paren-state
|
||
(setq car (car paren-state)
|
||
paren-state (cdr paren-state))
|
||
(if (< (if (consp car) (car car) car) bufpos)
|
||
(setq paren-state nil)
|
||
(setcdr ptr (list car))
|
||
(setq ptr (cdr ptr))))
|
||
(cdr newstate)))
|
||
|
||
(defun c-whack-state-after (bufpos paren-state)
|
||
;; Whack off any state information from PAREN-STATE which lies at or
|
||
;; after BUFPOS. Not destructive on PAREN-STATE.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(catch 'done
|
||
(while paren-state
|
||
(let ((car (car paren-state)))
|
||
(if (consp car)
|
||
;; just check the car, because in a balanced brace
|
||
;; expression, it must be impossible for the corresponding
|
||
;; close brace to be before point, but the open brace to
|
||
;; be after.
|
||
(if (<= bufpos (car car))
|
||
nil ; whack it off
|
||
(if (< bufpos (cdr car))
|
||
;; its possible that the open brace is before
|
||
;; bufpos, but the close brace is after. In that
|
||
;; case, convert this to a non-cons element. The
|
||
;; rest of the state is before bufpos, so we're
|
||
;; done.
|
||
(throw 'done (cons (car car) (cdr paren-state)))
|
||
;; we know that both the open and close braces are
|
||
;; before bufpos, so we also know that everything else
|
||
;; on state is before bufpos.
|
||
(throw 'done paren-state)))
|
||
(if (<= bufpos car)
|
||
nil ; whack it off
|
||
;; it's before bufpos, so everything else should too.
|
||
(throw 'done paren-state)))
|
||
(setq paren-state (cdr paren-state)))
|
||
nil)))
|
||
|
||
(defun c-most-enclosing-brace (paren-state &optional bufpos)
|
||
;; Return the bufpos of the innermost enclosing open paren before
|
||
;; bufpos that hasn't been narrowed out, or nil if none was found.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(let (enclosingp)
|
||
(or bufpos (setq bufpos 134217727))
|
||
(while paren-state
|
||
(setq enclosingp (car paren-state)
|
||
paren-state (cdr paren-state))
|
||
(if (or (consp enclosingp)
|
||
(>= enclosingp bufpos))
|
||
(setq enclosingp nil)
|
||
(if (< enclosingp (point-min))
|
||
(setq enclosingp nil))
|
||
(setq paren-state nil)))
|
||
enclosingp))
|
||
|
||
(defun c-least-enclosing-brace (paren-state &optional bufpos)
|
||
;; Return the bufpos of the outermost enclosing open paren before
|
||
;; bufpos that hasn't been narrowed out, or nil if none was found.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(let (pos elem)
|
||
(or bufpos (setq bufpos 134217727))
|
||
(while paren-state
|
||
(setq elem (car paren-state)
|
||
paren-state (cdr paren-state))
|
||
(unless (or (consp elem)
|
||
(>= elem bufpos))
|
||
(if (>= elem (point-min))
|
||
(setq pos elem))))
|
||
pos))
|
||
|
||
(defun c-safe-position (bufpos paren-state)
|
||
;; Return the closest known safe position higher up than BUFPOS, or
|
||
;; nil if PAREN-STATE doesn't contain one. Return nil if BUFPOS is
|
||
;; nil, which is useful to find the closest limit before a given
|
||
;; limit that might be nil.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(when bufpos
|
||
(let (elem)
|
||
(catch 'done
|
||
(while paren-state
|
||
(setq elem (car paren-state))
|
||
(if (consp elem)
|
||
(cond ((< (cdr elem) bufpos)
|
||
(throw 'done (cdr elem)))
|
||
((< (car elem) bufpos)
|
||
;; See below.
|
||
(throw 'done (min (1+ (car elem)) bufpos))))
|
||
(if (< elem bufpos)
|
||
;; elem is the position at and not after the opening paren, so
|
||
;; we can go forward one more step unless it's equal to
|
||
;; bufpos. This is useful in some cases avoid an extra paren
|
||
;; level between the safe position and bufpos.
|
||
(throw 'done (min (1+ elem) bufpos))))
|
||
(setq paren-state (cdr paren-state)))))))
|
||
|
||
(defun c-beginning-of-syntax ()
|
||
;; This is used for `font-lock-beginning-of-syntax-function'. It
|
||
;; goes to the closest previous point that is known to be outside
|
||
;; any string literal or comment. `c-state-cache' is used if it has
|
||
;; a position in the vicinity.
|
||
(let* ((paren-state c-state-cache)
|
||
elem
|
||
|
||
(pos (catch 'done
|
||
;; Note: Similar code in `c-safe-position'. The
|
||
;; difference is that we accept a safe position at
|
||
;; the point and don't bother to go forward past open
|
||
;; parens.
|
||
(while paren-state
|
||
(setq elem (car paren-state))
|
||
(if (consp elem)
|
||
(cond ((<= (cdr elem) (point))
|
||
(throw 'done (cdr elem)))
|
||
((<= (car elem) (point))
|
||
(throw 'done (car elem))))
|
||
(if (<= elem (point))
|
||
(throw 'done elem)))
|
||
(setq paren-state (cdr paren-state)))
|
||
(point-min))))
|
||
|
||
(if (> pos (- (point) 4000))
|
||
(goto-char pos)
|
||
;; The position is far back. Try `c-beginning-of-defun-1'
|
||
;; (although we can't be entirely sure it will go to a position
|
||
;; outside a comment or string in current emacsen). FIXME:
|
||
;; Consult `syntax-ppss' here.
|
||
(c-beginning-of-defun-1)
|
||
(if (< (point) pos)
|
||
(goto-char pos)))))
|
||
|
||
|
||
;; Tools for scanning identifiers and other tokens.
|
||
|
||
(defun c-on-identifier ()
|
||
"Return non-nil if the point is on or directly after an identifier.
|
||
Keywords are recognized and not considered identifiers. If an
|
||
identifier is detected, the returned value is its starting position.
|
||
If an identifier both starts and stops at the point \(can only happen
|
||
in Pike) then the point for the preceding one is returned.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(save-excursion
|
||
(if (zerop (skip-syntax-backward "w_"))
|
||
|
||
(when (c-major-mode-is 'pike-mode)
|
||
;; Handle the `<operator> syntax in Pike.
|
||
(let ((pos (point)))
|
||
(skip-chars-backward "-!%&*+/<=>^|~[]()")
|
||
(and (if (< (skip-chars-backward "`") 0)
|
||
t
|
||
(goto-char pos)
|
||
(eq (char-after) ?\`))
|
||
(looking-at c-symbol-key)
|
||
(>= (match-end 0) pos)
|
||
(point))))
|
||
|
||
(and (not (looking-at c-keywords-regexp))
|
||
(point)))))
|
||
|
||
(defsubst c-simple-skip-symbol-backward ()
|
||
;; If the point is at the end of a symbol then skip backward to the
|
||
;; beginning of it. Don't move otherwise. Return non-nil if point
|
||
;; moved.
|
||
(or (< (skip-syntax-backward "w_") 0)
|
||
(and (c-major-mode-is 'pike-mode)
|
||
;; Handle the `<operator> syntax in Pike.
|
||
(let ((pos (point)))
|
||
(if (and (< (skip-chars-backward "-!%&*+/<=>^|~[]()") 0)
|
||
(< (skip-chars-backward "`") 0)
|
||
(looking-at c-symbol-key)
|
||
(>= (match-end 0) pos))
|
||
t
|
||
(goto-char pos)
|
||
nil)))))
|
||
|
||
(defsubst c-beginning-of-current-token (&optional back-limit)
|
||
;; Move to the beginning of the current token. Do not move if not
|
||
;; in the middle of one. BACK-LIMIT may be used to bound the
|
||
;; backward search; if given it's assumed to be at the boundary
|
||
;; between two tokens.
|
||
(if (looking-at "\\w\\|\\s_")
|
||
(skip-syntax-backward "w_" back-limit)
|
||
(let ((start (point)))
|
||
(when (< (skip-syntax-backward ".()" back-limit) 0)
|
||
(while (let ((pos (or (and (looking-at c-nonsymbol-token-regexp)
|
||
(match-end 0))
|
||
;; `c-nonsymbol-token-regexp' should always match
|
||
;; since we've skipped backward over punctuator
|
||
;; or paren syntax, but consume one char in case
|
||
;; it doesn't so that we don't leave point before
|
||
;; some earlier incorrect token.
|
||
(1+ (point)))))
|
||
(if (<= pos start)
|
||
(goto-char pos))
|
||
(< pos start)))))))
|
||
|
||
(defun c-end-of-current-token (&optional back-limit)
|
||
;; Move to the end of the current token. Do not move if not in the
|
||
;; middle of one. BACK-LIMIT may be used to bound the backward
|
||
;; search; if given it's assumed to be at the boundary between two
|
||
;; tokens. Return non-nil if the point is moved, nil otherwise.
|
||
(let ((start (point)))
|
||
(cond ((< (skip-syntax-backward "w_" (1- start)) 0)
|
||
(skip-syntax-forward "w_"))
|
||
((< (skip-syntax-backward ".()" back-limit) 0)
|
||
(while (progn
|
||
(if (looking-at c-nonsymbol-token-regexp)
|
||
(goto-char (match-end 0))
|
||
;; `c-nonsymbol-token-regexp' should always match since
|
||
;; we've skipped backward over punctuator or paren
|
||
;; syntax, but move forward in case it doesn't so that
|
||
;; we don't leave point earlier than we started with.
|
||
(forward-char))
|
||
(< (point) start)))))
|
||
(> (point) start)))
|
||
|
||
(defconst c-jump-syntax-balanced
|
||
(if (memq 'gen-string-delim c-emacs-features)
|
||
"\\w\\|\\s_\\|\\s\(\\|\\s\)\\|\\s\"\\|\\s|"
|
||
"\\w\\|\\s_\\|\\s\(\\|\\s\)\\|\\s\""))
|
||
|
||
(defconst c-jump-syntax-unbalanced
|
||
(if (memq 'gen-string-delim c-emacs-features)
|
||
"\\w\\|\\s_\\|\\s\"\\|\\s|"
|
||
"\\w\\|\\s_\\|\\s\""))
|
||
|
||
(defun c-forward-token-2 (&optional count balanced limit)
|
||
"Move forward by tokens.
|
||
A token is defined as all symbols and identifiers which aren't
|
||
syntactic whitespace \(note that multicharacter tokens like \"==\" are
|
||
treated properly). Point is always either left at the beginning of a
|
||
token or not moved at all. COUNT specifies the number of tokens to
|
||
move; a negative COUNT moves in the opposite direction. A COUNT of 0
|
||
moves to the next token beginning only if not already at one. If
|
||
BALANCED is true, move over balanced parens, otherwise move into them.
|
||
Also, if BALANCED is true, never move out of an enclosing paren.
|
||
|
||
LIMIT sets the limit for the movement and defaults to the point limit.
|
||
The case when LIMIT is set in the middle of a token, comment or macro
|
||
is handled correctly, i.e. the point won't be left there.
|
||
|
||
Return the number of tokens left to move \(positive or negative). If
|
||
BALANCED is true, a move over a balanced paren counts as one. Note
|
||
that if COUNT is 0 and no appropriate token beginning is found, 1 will
|
||
be returned. Thus, a return value of 0 guarantees that point is at
|
||
the requested position and a return value less \(without signs) than
|
||
COUNT guarantees that point is at the beginning of some token."
|
||
|
||
(or count (setq count 1))
|
||
(if (< count 0)
|
||
(- (c-backward-token-2 (- count) balanced limit))
|
||
|
||
(let ((jump-syntax (if balanced
|
||
c-jump-syntax-balanced
|
||
c-jump-syntax-unbalanced))
|
||
(last (point))
|
||
(prev (point)))
|
||
|
||
(if (zerop count)
|
||
;; If count is zero we should jump if in the middle of a token.
|
||
(c-end-of-current-token))
|
||
|
||
(save-restriction
|
||
(if limit (narrow-to-region (point-min) limit))
|
||
(if (/= (point)
|
||
(progn (c-forward-syntactic-ws) (point)))
|
||
;; Skip whitespace. Count this as a move if we did in
|
||
;; fact move.
|
||
(setq count (max (1- count) 0)))
|
||
|
||
(if (eobp)
|
||
;; Moved out of bounds. Make sure the returned count isn't zero.
|
||
(progn
|
||
(if (zerop count) (setq count 1))
|
||
(goto-char last))
|
||
|
||
;; Use `condition-case' to avoid having the limit tests
|
||
;; inside the loop.
|
||
(condition-case nil
|
||
(while (and
|
||
(> count 0)
|
||
(progn
|
||
(setq last (point))
|
||
(cond ((looking-at jump-syntax)
|
||
(goto-char (scan-sexps (point) 1))
|
||
t)
|
||
((looking-at c-nonsymbol-token-regexp)
|
||
(goto-char (match-end 0))
|
||
t)
|
||
;; `c-nonsymbol-token-regexp' above should always
|
||
;; match if there are correct tokens. Try to
|
||
;; widen to see if the limit was set in the
|
||
;; middle of one, else fall back to treating
|
||
;; the offending thing as a one character token.
|
||
((and limit
|
||
(save-restriction
|
||
(widen)
|
||
(looking-at c-nonsymbol-token-regexp)))
|
||
nil)
|
||
(t
|
||
(forward-char)
|
||
t))))
|
||
(c-forward-syntactic-ws)
|
||
(setq prev last
|
||
count (1- count)))
|
||
(error (goto-char last)))
|
||
|
||
(when (eobp)
|
||
(goto-char prev)
|
||
(setq count (1+ count)))))
|
||
|
||
count)))
|
||
|
||
(defun c-backward-token-2 (&optional count balanced limit)
|
||
"Move backward by tokens.
|
||
See `c-forward-token-2' for details."
|
||
|
||
(or count (setq count 1))
|
||
(if (< count 0)
|
||
(- (c-forward-token-2 (- count) balanced limit))
|
||
|
||
(or limit (setq limit (point-min)))
|
||
(let ((jump-syntax (if balanced
|
||
c-jump-syntax-balanced
|
||
c-jump-syntax-unbalanced))
|
||
(last (point)))
|
||
|
||
(if (zerop count)
|
||
;; The count is zero so try to skip to the beginning of the
|
||
;; current token.
|
||
(if (> (point)
|
||
(progn (c-beginning-of-current-token) (point)))
|
||
(if (< (point) limit)
|
||
;; The limit is inside the same token, so return 1.
|
||
(setq count 1))
|
||
|
||
;; We're not in the middle of a token. If there's
|
||
;; whitespace after the point then we must move backward,
|
||
;; so set count to 1 in that case.
|
||
(and (looking-at c-syntactic-ws-start)
|
||
;; If we're looking at a '#' that might start a cpp
|
||
;; directive then we have to do a more elaborate check.
|
||
(or (/= (char-after) ?#)
|
||
(not c-opt-cpp-prefix)
|
||
(save-excursion
|
||
(and (= (point)
|
||
(progn (beginning-of-line)
|
||
(looking-at "[ \t]*")
|
||
(match-end 0)))
|
||
(or (bobp)
|
||
(progn (backward-char)
|
||
(not (eq (char-before) ?\\)))))))
|
||
(setq count 1))))
|
||
|
||
;; Use `condition-case' to avoid having to check for buffer
|
||
;; limits in `backward-char', `scan-sexps' and `goto-char' below.
|
||
(condition-case nil
|
||
(while (and
|
||
(> count 0)
|
||
(progn
|
||
(c-backward-syntactic-ws)
|
||
(backward-char)
|
||
(if (looking-at jump-syntax)
|
||
(goto-char (scan-sexps (1+ (point)) -1))
|
||
;; This can be very inefficient if there's a long
|
||
;; sequence of operator tokens without any separation.
|
||
;; That doesn't happen in practice, anyway.
|
||
(c-beginning-of-current-token))
|
||
(>= (point) limit)))
|
||
(setq last (point)
|
||
count (1- count)))
|
||
(error (goto-char last)))
|
||
|
||
(if (< (point) limit)
|
||
(goto-char last))
|
||
|
||
count)))
|
||
|
||
(defun c-forward-token-1 (&optional count balanced limit)
|
||
"Like `c-forward-token-2' but doesn't treat multicharacter operator
|
||
tokens like \"==\" as single tokens, i.e. all sequences of symbol
|
||
characters are jumped over character by character. This function is
|
||
for compatibility only; it's only a wrapper over `c-forward-token-2'."
|
||
(let ((c-nonsymbol-token-regexp "\\s.\\|\\s\(\\|\\s\)"))
|
||
(c-forward-token-2 count balanced limit)))
|
||
|
||
(defun c-backward-token-1 (&optional count balanced limit)
|
||
"Like `c-backward-token-2' but doesn't treat multicharacter operator
|
||
tokens like \"==\" as single tokens, i.e. all sequences of symbol
|
||
characters are jumped over character by character. This function is
|
||
for compatibility only; it's only a wrapper over `c-backward-token-2'."
|
||
(let ((c-nonsymbol-token-regexp "\\s.\\|\\s\(\\|\\s\)"))
|
||
(c-backward-token-2 count balanced limit)))
|
||
|
||
|
||
;; Tools for doing searches restricted to syntactically relevant text.
|
||
|
||
(defun c-syntactic-re-search-forward (regexp &optional bound noerror
|
||
paren-level not-inside-token
|
||
lookbehind-submatch)
|
||
"Like `re-search-forward', but only report matches that are found
|
||
in syntactically significant text. I.e. matches in comments, macros
|
||
or string literals are ignored. The start point is assumed to be
|
||
outside any comment, macro or string literal, or else the content of
|
||
that region is taken as syntactically significant text.
|
||
|
||
If PAREN-LEVEL is non-nil, an additional restriction is added to
|
||
ignore matches in nested paren sexps. The search will also not go
|
||
outside the current list sexp, which has the effect that if the point
|
||
should be moved to BOUND when no match is found \(i.e. NOERROR is
|
||
neither nil nor t), then it will be at the closing paren if the end of
|
||
the current list sexp is encountered first.
|
||
|
||
If NOT-INSIDE-TOKEN is non-nil, matches in the middle of tokens are
|
||
ignored. Things like multicharacter operators and special symbols
|
||
\(e.g. \"`()\" in Pike) are handled but currently not floating point
|
||
constants.
|
||
|
||
If LOOKBEHIND-SUBMATCH is non-nil, it's taken as a number of a
|
||
subexpression in REGEXP. The end of that submatch is used as the
|
||
position to check for syntactic significance. If LOOKBEHIND-SUBMATCH
|
||
isn't used or if that subexpression didn't match then the start
|
||
position of the whole match is used instead. The \"look behind\"
|
||
subexpression is never tested before the starting position, so it
|
||
might be a good idea to include \\=\\= as a match alternative in it.
|
||
|
||
Optimization note: Matches might be missed if the \"look behind\"
|
||
subexpression can match the end of nonwhite syntactic whitespace,
|
||
i.e. the end of comments or cpp directives. This since the function
|
||
skips over such things before resuming the search. It's on the other
|
||
hand not safe to assume that the \"look behind\" subexpression never
|
||
matches syntactic whitespace.
|
||
|
||
Bug: Unbalanced parens inside cpp directives are currently not handled
|
||
correctly \(i.e. they don't get ignored as they should) when
|
||
PAREN-LEVEL is set."
|
||
|
||
(or bound (setq bound (point-max)))
|
||
(if paren-level (setq paren-level -1))
|
||
|
||
;;(message "c-syntactic-re-search-forward %s %s %S" (point) bound regexp)
|
||
|
||
(let ((start (point))
|
||
tmp
|
||
;; Start position for the last search.
|
||
search-pos
|
||
;; The `parse-partial-sexp' state between the start position
|
||
;; and the point.
|
||
state
|
||
;; The current position after the last state update. The next
|
||
;; `parse-partial-sexp' continues from here.
|
||
(state-pos (point))
|
||
;; The position at which to check the state and the state
|
||
;; there. This is separate from `state-pos' since we might
|
||
;; need to back up before doing the next search round.
|
||
check-pos check-state
|
||
;; Last position known to end a token.
|
||
(last-token-end-pos (point-min))
|
||
;; Set when a valid match is found.
|
||
found)
|
||
|
||
(condition-case err
|
||
(while
|
||
(and
|
||
(progn
|
||
(setq search-pos (point))
|
||
(re-search-forward regexp bound noerror))
|
||
|
||
(progn
|
||
(setq state (parse-partial-sexp
|
||
state-pos (match-beginning 0) paren-level nil state)
|
||
state-pos (point))
|
||
(if (setq check-pos (and lookbehind-submatch
|
||
(or (not paren-level)
|
||
(>= (car state) 0))
|
||
(match-end lookbehind-submatch)))
|
||
(setq check-state (parse-partial-sexp
|
||
state-pos check-pos paren-level nil state))
|
||
(setq check-pos state-pos
|
||
check-state state))
|
||
|
||
;; NOTE: If we got a look behind subexpression and get
|
||
;; an insignificant match in something that isn't
|
||
;; syntactic whitespace (i.e. strings or in nested
|
||
;; parentheses), then we can never skip more than a
|
||
;; single character from the match start position
|
||
;; (i.e. `state-pos' here) before continuing the
|
||
;; search. That since the look behind subexpression
|
||
;; might match the end of the insignificant region in
|
||
;; the next search.
|
||
|
||
(cond
|
||
((elt check-state 7)
|
||
;; Match inside a line comment. Skip to eol. Use
|
||
;; `re-search-forward' instead of `skip-chars-forward' to get
|
||
;; the right bound behavior.
|
||
(re-search-forward "[\n\r]" bound noerror))
|
||
|
||
((elt check-state 4)
|
||
;; Match inside a block comment. Skip to the '*/'.
|
||
(search-forward "*/" bound noerror))
|
||
|
||
((and (not (elt check-state 5))
|
||
(eq (char-before check-pos) ?/)
|
||
(not (c-get-char-property (1- check-pos) 'syntax-table))
|
||
(memq (char-after check-pos) '(?/ ?*)))
|
||
;; Match in the middle of the opener of a block or line
|
||
;; comment.
|
||
(if (= (char-after check-pos) ?/)
|
||
(re-search-forward "[\n\r]" bound noerror)
|
||
(search-forward "*/" bound noerror)))
|
||
|
||
;; The last `parse-partial-sexp' above might have
|
||
;; stopped short of the real check position if the end
|
||
;; of the current sexp was encountered in paren-level
|
||
;; mode. The checks above are always false in that
|
||
;; case, and since they can do better skipping in
|
||
;; lookbehind-submatch mode, we do them before
|
||
;; checking the paren level.
|
||
|
||
((and paren-level
|
||
(/= (setq tmp (car check-state)) 0))
|
||
;; Check the paren level first since we're short of the
|
||
;; syntactic checking position if the end of the
|
||
;; current sexp was encountered by `parse-partial-sexp'.
|
||
(if (> tmp 0)
|
||
|
||
;; Inside a nested paren sexp.
|
||
(if lookbehind-submatch
|
||
;; See the NOTE above.
|
||
(progn (goto-char state-pos) t)
|
||
;; Skip out of the paren quickly.
|
||
(setq state (parse-partial-sexp state-pos bound 0 nil state)
|
||
state-pos (point)))
|
||
|
||
;; Have exited the current paren sexp.
|
||
(if noerror
|
||
(progn
|
||
;; The last `parse-partial-sexp' call above
|
||
;; has left us just after the closing paren
|
||
;; in this case, so we can modify the bound
|
||
;; to leave the point at the right position
|
||
;; upon return.
|
||
(setq bound (1- (point)))
|
||
nil)
|
||
(signal 'search-failed (list regexp)))))
|
||
|
||
((setq tmp (elt check-state 3))
|
||
;; Match inside a string.
|
||
(if (or lookbehind-submatch
|
||
(not (integerp tmp)))
|
||
;; See the NOTE above.
|
||
(progn (goto-char state-pos) t)
|
||
;; Skip to the end of the string before continuing.
|
||
(let ((ender (make-string 1 tmp)) (continue t))
|
||
(while (if (search-forward ender bound noerror)
|
||
(progn
|
||
(setq state (parse-partial-sexp
|
||
state-pos (point) nil nil state)
|
||
state-pos (point))
|
||
(elt state 3))
|
||
(setq continue nil)))
|
||
continue)))
|
||
|
||
((save-excursion
|
||
(save-match-data
|
||
(c-beginning-of-macro start)))
|
||
;; Match inside a macro. Skip to the end of it.
|
||
(c-end-of-macro)
|
||
(cond ((<= (point) bound) t)
|
||
(noerror nil)
|
||
(t (signal 'search-failed (list regexp)))))
|
||
|
||
((and not-inside-token
|
||
(or (< check-pos last-token-end-pos)
|
||
(< check-pos
|
||
(save-excursion
|
||
(goto-char check-pos)
|
||
(save-match-data
|
||
(c-end-of-current-token last-token-end-pos))
|
||
(setq last-token-end-pos (point))))))
|
||
;; Inside a token.
|
||
(if lookbehind-submatch
|
||
;; See the NOTE above.
|
||
(goto-char state-pos)
|
||
(goto-char (min last-token-end-pos bound))))
|
||
|
||
(t
|
||
;; A real match.
|
||
(setq found t)
|
||
nil)))
|
||
|
||
;; Should loop to search again, but take care to avoid
|
||
;; looping on the same spot.
|
||
(or (/= search-pos (point))
|
||
(if (= (point) bound)
|
||
(if noerror
|
||
nil
|
||
(signal 'search-failed (list regexp)))
|
||
(forward-char)
|
||
t))))
|
||
|
||
(error
|
||
(goto-char start)
|
||
(signal (car err) (cdr err))))
|
||
|
||
;;(message "c-syntactic-re-search-forward done %s" (or (match-end 0) (point)))
|
||
|
||
(if found
|
||
(progn
|
||
(goto-char (match-end 0))
|
||
(match-end 0))
|
||
|
||
;; Search failed. Set point as appropriate.
|
||
(if (eq noerror t)
|
||
(goto-char start)
|
||
(goto-char bound))
|
||
nil)))
|
||
|
||
(defun c-syntactic-skip-backward (skip-chars &optional limit)
|
||
"Like `skip-chars-backward' but only look at syntactically relevant chars,
|
||
i.e. don't stop at positions inside syntactic whitespace or string
|
||
literals. Preprocessor directives are also ignored, with the exception
|
||
of the one that the point starts within, if any. If LIMIT is given,
|
||
it's assumed to be at a syntactically relevant position."
|
||
|
||
(let ((start (point))
|
||
;; A list of syntactically relevant positions in descending
|
||
;; order. It's used to avoid scanning repeatedly over
|
||
;; potentially large regions with `parse-partial-sexp' to verify
|
||
;; each position.
|
||
safe-pos-list
|
||
;; The result from `c-beginning-of-macro' at the start position or the
|
||
;; start position itself if it isn't within a macro. Evaluated on
|
||
;; demand.
|
||
start-macro-beg)
|
||
|
||
(while (progn
|
||
(while (and
|
||
(< (skip-chars-backward skip-chars limit) 0)
|
||
|
||
;; Use `parse-partial-sexp' from a safe position down to
|
||
;; the point to check if it's outside comments and
|
||
;; strings.
|
||
(let ((pos (point)) safe-pos state)
|
||
;; Pick a safe position as close to the point as
|
||
;; possible.
|
||
;;
|
||
;; FIXME: Consult `syntax-ppss' here if our
|
||
;; cache doesn't give a good position.
|
||
(while (and safe-pos-list
|
||
(> (car safe-pos-list) (point)))
|
||
(setq safe-pos-list (cdr safe-pos-list)))
|
||
(unless (setq safe-pos (car-safe safe-pos-list))
|
||
(setq safe-pos (max (or (c-safe-position
|
||
(point) (or c-state-cache
|
||
(c-parse-state)))
|
||
0)
|
||
(point-min))
|
||
safe-pos-list (list safe-pos)))
|
||
|
||
(while (progn
|
||
(setq state (parse-partial-sexp
|
||
safe-pos pos 0))
|
||
(< (point) pos))
|
||
;; Cache positions along the way to use if we have to
|
||
;; back up more. Every closing paren on the same
|
||
;; level seems like fairly well spaced positions.
|
||
(setq safe-pos (point)
|
||
safe-pos-list (cons safe-pos safe-pos-list)))
|
||
|
||
(cond
|
||
((or (elt state 3) (elt state 4))
|
||
;; Inside string or comment. Continue search at the
|
||
;; beginning of it.
|
||
(if (setq pos (nth 8 state))
|
||
;; It's an emacs where `parse-partial-sexp'
|
||
;; supplies the starting position.
|
||
(goto-char pos)
|
||
(goto-char (car (c-literal-limits safe-pos))))
|
||
t)
|
||
|
||
((c-beginning-of-macro limit)
|
||
;; Inside a macro.
|
||
(if (< (point)
|
||
(or start-macro-beg
|
||
(setq start-macro-beg
|
||
(save-excursion
|
||
(goto-char start)
|
||
(c-beginning-of-macro limit)
|
||
(point)))))
|
||
t
|
||
;; It's inside the same macro we started in so it's
|
||
;; a relevant match.
|
||
(goto-char pos)
|
||
nil))))))
|
||
|
||
(> (point)
|
||
(progn
|
||
;; Skip syntactic ws afterwards so that we don't stop at the
|
||
;; end of a comment if `skip-chars' is something like "^/".
|
||
(c-backward-syntactic-ws)
|
||
(point)))))
|
||
|
||
(- (point) start)))
|
||
|
||
|
||
;; Tools for handling comments and string literals.
|
||
|
||
(defun c-slow-in-literal (&optional lim detect-cpp)
|
||
"Return the type of literal point is in, if any.
|
||
The return value is `c' if in a C-style comment, `c++' if in a C++
|
||
style comment, `string' if in a string literal, `pound' if DETECT-CPP
|
||
is non-nil and in a preprocessor line, or nil if somewhere else.
|
||
Optional LIM is used as the backward limit of the search. If omitted,
|
||
or nil, `c-beginning-of-defun' is used.
|
||
|
||
The last point calculated is cached if the cache is enabled, i.e. if
|
||
`c-in-literal-cache' is bound to a two element vector.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
(if (and (vectorp c-in-literal-cache)
|
||
(= (point) (aref c-in-literal-cache 0)))
|
||
(aref c-in-literal-cache 1)
|
||
(let ((rtn (save-excursion
|
||
(let* ((pos (point))
|
||
(lim (or lim (progn
|
||
(c-beginning-of-syntax)
|
||
(point))))
|
||
(state (parse-partial-sexp lim pos)))
|
||
(cond
|
||
((elt state 3) 'string)
|
||
((elt state 4) (if (elt state 7) 'c++ 'c))
|
||
((and detect-cpp (c-beginning-of-macro lim)) 'pound)
|
||
(t nil))))))
|
||
;; cache this result if the cache is enabled
|
||
(if (not c-in-literal-cache)
|
||
(setq c-in-literal-cache (vector (point) rtn)))
|
||
rtn)))
|
||
|
||
;; XEmacs has a built-in function that should make this much quicker.
|
||
;; I don't think we even need the cache, which makes our lives more
|
||
;; complicated anyway. In this case, lim is only used to detect
|
||
;; cpp directives.
|
||
;;
|
||
;; Note that there is a bug in Xemacs's buffer-syntactic-context when used in
|
||
;; conjunction with syntax-table-properties. The bug is present in, e.g.,
|
||
;; Xemacs 21.4.4. It manifested itself thus:
|
||
;;
|
||
;; Starting with an empty AWK Mode buffer, type
|
||
;; /regexp/ {<C-j>
|
||
;; Point gets wrongly left at column 0, rather than being indented to tab-width.
|
||
;;
|
||
;; AWK Mode is designed such that when the first / is typed, it gets the
|
||
;; syntax-table property "string fence". When the second / is typed, BOTH /s
|
||
;; are given the s-t property "string". However, buffer-syntactic-context
|
||
;; fails to take account of the change of the s-t property on the opening / to
|
||
;; "string", and reports that the { is within a string started by the second /.
|
||
;;
|
||
;; The workaround for this is for the AWK Mode initialisation to switch the
|
||
;; defalias for c-in-literal to c-slow-in-literal. This will slow down other
|
||
;; cc-modes in Xemacs whenever an awk-buffer has been initialised.
|
||
;;
|
||
;; (Alan Mackenzie, 2003/4/30).
|
||
|
||
(defun c-fast-in-literal (&optional lim detect-cpp)
|
||
(let ((context (buffer-syntactic-context)))
|
||
(cond
|
||
((eq context 'string) 'string)
|
||
((eq context 'comment) 'c++)
|
||
((eq context 'block-comment) 'c)
|
||
((and detect-cpp (save-excursion (c-beginning-of-macro lim))) 'pound))))
|
||
|
||
(defalias 'c-in-literal
|
||
(if (fboundp 'buffer-syntactic-context)
|
||
'c-fast-in-literal ; XEmacs
|
||
'c-slow-in-literal)) ; GNU Emacs
|
||
|
||
;; The defalias above isn't enough to shut up the byte compiler.
|
||
(cc-bytecomp-defun c-in-literal)
|
||
|
||
(defun c-literal-limits (&optional lim near not-in-delimiter)
|
||
"Return a cons of the beginning and end positions of the comment or
|
||
string surrounding point (including both delimiters), or nil if point
|
||
isn't in one. If LIM is non-nil, it's used as the \"safe\" position
|
||
to start parsing from. If NEAR is non-nil, then the limits of any
|
||
literal next to point is returned. \"Next to\" means there's only
|
||
spaces and tabs between point and the literal. The search for such a
|
||
literal is done first in forward direction. If NOT-IN-DELIMITER is
|
||
non-nil, the case when point is inside a starting delimiter won't be
|
||
recognized. This only has effect for comments, which have starting
|
||
delimiters with more than one character.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(save-excursion
|
||
(let* ((pos (point))
|
||
(lim (or lim (progn
|
||
(c-beginning-of-syntax)
|
||
(point))))
|
||
(state (parse-partial-sexp lim pos)))
|
||
|
||
(cond ((elt state 3)
|
||
;; String. Search backward for the start.
|
||
(while (elt state 3)
|
||
(search-backward (make-string 1 (elt state 3)))
|
||
(setq state (parse-partial-sexp lim (point))))
|
||
(cons (point) (or (c-safe (c-forward-sexp 1) (point))
|
||
(point-max))))
|
||
|
||
((elt state 7)
|
||
;; Line comment. Search from bol for the comment starter.
|
||
(beginning-of-line)
|
||
(setq state (parse-partial-sexp lim (point))
|
||
lim (point))
|
||
(while (not (elt state 7))
|
||
(search-forward "//") ; Should never fail.
|
||
(setq state (parse-partial-sexp
|
||
lim (point) nil nil state)
|
||
lim (point)))
|
||
(backward-char 2)
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
((elt state 4)
|
||
;; Block comment. Search backward for the comment starter.
|
||
(while (elt state 4)
|
||
(search-backward "/*") ; Should never fail.
|
||
(setq state (parse-partial-sexp lim (point))))
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
((and (not not-in-delimiter)
|
||
(not (elt state 5))
|
||
(eq (char-before) ?/)
|
||
(looking-at "[/*]"))
|
||
;; We're standing in a comment starter.
|
||
(backward-char 1)
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
(near
|
||
(goto-char pos)
|
||
|
||
;; Search forward for a literal.
|
||
(skip-chars-forward " \t")
|
||
|
||
(cond
|
||
((looking-at c-string-limit-regexp) ; String.
|
||
(cons (point) (or (c-safe (c-forward-sexp 1) (point))
|
||
(point-max))))
|
||
|
||
((looking-at c-comment-start-regexp) ; Line or block comment.
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
(t
|
||
;; Search backward.
|
||
(skip-chars-backward " \t")
|
||
|
||
(let ((end (point)) beg)
|
||
(cond
|
||
((save-excursion
|
||
(< (skip-syntax-backward c-string-syntax) 0)) ; String.
|
||
(setq beg (c-safe (c-backward-sexp 1) (point))))
|
||
|
||
((and (c-safe (forward-char -2) t)
|
||
(looking-at "*/"))
|
||
;; Block comment. Due to the nature of line
|
||
;; comments, they will always be covered by the
|
||
;; normal case above.
|
||
(goto-char end)
|
||
(c-backward-single-comment)
|
||
;; If LIM is bogus, beg will be bogus.
|
||
(setq beg (point))))
|
||
|
||
(if beg (cons beg end))))))
|
||
))))
|
||
|
||
(defun c-literal-limits-fast (&optional lim near not-in-delimiter)
|
||
;; Like c-literal-limits, but for emacsen whose `parse-partial-sexp'
|
||
;; returns the pos of the comment start.
|
||
|
||
"Return a cons of the beginning and end positions of the comment or
|
||
string surrounding point (including both delimiters), or nil if point
|
||
isn't in one. If LIM is non-nil, it's used as the \"safe\" position
|
||
to start parsing from. If NEAR is non-nil, then the limits of any
|
||
literal next to point is returned. \"Next to\" means there's only
|
||
spaces and tabs between point and the literal. The search for such a
|
||
literal is done first in forward direction. If NOT-IN-DELIMITER is
|
||
non-nil, the case when point is inside a starting delimiter won't be
|
||
recognized. This only has effect for comments, which have starting
|
||
delimiters with more than one character.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
|
||
(save-excursion
|
||
(let* ((pos (point))
|
||
(lim (or lim (progn
|
||
(c-beginning-of-syntax)
|
||
(point))))
|
||
(state (parse-partial-sexp lim pos)))
|
||
|
||
(cond ((elt state 3) ; String.
|
||
(goto-char (elt state 8))
|
||
(cons (point) (or (c-safe (c-forward-sexp 1) (point))
|
||
(point-max))))
|
||
|
||
((elt state 4) ; Comment.
|
||
(goto-char (elt state 8))
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
((and (not not-in-delimiter)
|
||
(not (elt state 5))
|
||
(eq (char-before) ?/)
|
||
(looking-at "[/*]"))
|
||
;; We're standing in a comment starter.
|
||
(backward-char 1)
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
(near
|
||
(goto-char pos)
|
||
|
||
;; Search forward for a literal.
|
||
(skip-chars-forward " \t")
|
||
|
||
(cond
|
||
((looking-at c-string-limit-regexp) ; String.
|
||
(cons (point) (or (c-safe (c-forward-sexp 1) (point))
|
||
(point-max))))
|
||
|
||
((looking-at c-comment-start-regexp) ; Line or block comment.
|
||
(cons (point) (progn (c-forward-single-comment) (point))))
|
||
|
||
(t
|
||
;; Search backward.
|
||
(skip-chars-backward " \t")
|
||
|
||
(let ((end (point)) beg)
|
||
(cond
|
||
((save-excursion
|
||
(< (skip-syntax-backward c-string-syntax) 0)) ; String.
|
||
(setq beg (c-safe (c-backward-sexp 1) (point))))
|
||
|
||
((and (c-safe (forward-char -2) t)
|
||
(looking-at "*/"))
|
||
;; Block comment. Due to the nature of line
|
||
;; comments, they will always be covered by the
|
||
;; normal case above.
|
||
(goto-char end)
|
||
(c-backward-single-comment)
|
||
;; If LIM is bogus, beg will be bogus.
|
||
(setq beg (point))))
|
||
|
||
(if beg (cons beg end))))))
|
||
))))
|
||
|
||
(if (memq 'pps-extended-state c-emacs-features)
|
||
(defalias 'c-literal-limits 'c-literal-limits-fast))
|
||
|
||
(defun c-collect-line-comments (range)
|
||
"If the argument is a cons of two buffer positions (such as returned by
|
||
`c-literal-limits'), and that range contains a C++ style line comment,
|
||
then an extended range is returned that contains all adjacent line
|
||
comments (i.e. all comments that starts in the same column with no
|
||
empty lines or non-whitespace characters between them). Otherwise the
|
||
argument is returned.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
(save-excursion
|
||
(condition-case nil
|
||
(if (and (consp range) (progn
|
||
(goto-char (car range))
|
||
(looking-at "//")))
|
||
(let ((col (current-column))
|
||
(beg (point))
|
||
(bopl (c-point 'bopl))
|
||
(end (cdr range)))
|
||
;; Got to take care in the backward direction to handle
|
||
;; comments which are preceded by code.
|
||
(while (and (c-backward-single-comment)
|
||
(>= (point) bopl)
|
||
(looking-at "//")
|
||
(= col (current-column)))
|
||
(setq beg (point)
|
||
bopl (c-point 'bopl)))
|
||
(goto-char end)
|
||
(while (and (progn (skip-chars-forward " \t")
|
||
(looking-at "//"))
|
||
(= col (current-column))
|
||
(prog1 (zerop (forward-line 1))
|
||
(setq end (point)))))
|
||
(cons beg end))
|
||
range)
|
||
(error range))))
|
||
|
||
(defun c-literal-type (range)
|
||
"Convenience function that given the result of `c-literal-limits',
|
||
returns nil or the type of literal that the range surrounds. It's
|
||
much faster than using `c-in-literal' and is intended to be used when
|
||
you need both the type of a literal and its limits.
|
||
|
||
This function does not do any hidden buffer changes."
|
||
(if (consp range)
|
||
(save-excursion
|
||
(goto-char (car range))
|
||
(cond ((looking-at c-string-limit-regexp) 'string)
|
||
((or (looking-at "//") ; c++ line comment
|
||
(and (looking-at "\\s<") ; comment starter
|
||
(looking-at "#"))) ; awk comment.
|
||
'c++)
|
||
(t 'c))) ; Assuming the range is valid.
|
||
range))
|
||
|
||
|
||
;; `c-find-decl-spots' and accompanying stuff.
|
||
|
||
;; Variables used in `c-find-decl-spots' to cache the search done for
|
||
;; the first declaration in the last call. When that function starts,
|
||
;; it needs to back up over syntactic whitespace to look at the last
|
||
;; token before the region being searched. That can sometimes cause
|
||
;; moves back and forth over a quite large region of comments and
|
||
;; macros, which would be repeated for each changed character when
|
||
;; we're called during fontification, since font-lock refontifies the
|
||
;; current line for each change. Thus it's worthwhile to cache the
|
||
;; first match.
|
||
;;
|
||
;; `c-find-decl-syntactic-pos' is a syntactically relevant position in
|
||
;; the syntactic whitespace less or equal to some start position.
|
||
;; There's no cached value if it's nil.
|
||
;;
|
||
;; `c-find-decl-match-pos' is the match position if
|
||
;; `c-find-decl-prefix-search' matched before the syntactic whitespace
|
||
;; at `c-find-decl-syntactic-pos', or nil if there's no such match.
|
||
(defvar c-find-decl-syntactic-pos nil)
|
||
(make-variable-buffer-local 'c-find-decl-syntactic-pos)
|
||
(defvar c-find-decl-match-pos nil)
|
||
(make-variable-buffer-local 'c-find-decl-match-pos)
|
||
|
||
(defsubst c-invalidate-find-decl-cache (change-min-pos)
|
||
(and c-find-decl-syntactic-pos
|
||
(< change-min-pos c-find-decl-syntactic-pos)
|
||
(setq c-find-decl-syntactic-pos nil)))
|
||
|
||
; (defface c-debug-decl-spot-face
|
||
; '((t (:background "Turquoise")))
|
||
; "Debug face to mark the spots where `c-find-decl-spots' stopped.")
|
||
; (defface c-debug-decl-sws-face
|
||
; '((t (:background "Khaki")))
|
||
; "Debug face to mark the syntactic whitespace between the declaration
|
||
; spots and the preceding token end.")
|
||
|
||
(defmacro c-debug-put-decl-spot-faces (match-pos decl-pos)
|
||
(when (facep 'c-debug-decl-spot-face)
|
||
`(let ((match-pos ,match-pos) (decl-pos ,decl-pos))
|
||
(c-debug-add-face (max match-pos (point-min)) decl-pos
|
||
'c-debug-decl-sws-face)
|
||
(c-debug-add-face decl-pos (min (1+ decl-pos) (point-max))
|
||
'c-debug-decl-spot-face))))
|
||
(defmacro c-debug-remove-decl-spot-faces (beg end)
|
||
(when (facep 'c-debug-decl-spot-face)
|
||
`(progn
|
||
(c-debug-remove-face ,beg ,end 'c-debug-decl-spot-face)
|
||
(c-debug-remove-face ,beg ,end 'c-debug-decl-sws-face))))
|
||
|
||
(defmacro c-find-decl-prefix-search ()
|
||
;; Macro used inside `c-find-decl-spots'. It ought to be a defun,
|
||
;; but it contains lots of free variables that refer to things
|
||
;; inside `c-find-decl-spots'. The point is left at `cfd-match-pos'
|
||
;; if there is a match, otherwise at `cfd-limit'.
|
||
|
||
'(progn
|
||
;; Find the next property match position if we haven't got one already.
|
||
(unless cfd-prop-match
|
||
(save-excursion
|
||
(while (progn
|
||
(goto-char (next-single-property-change
|
||
(point) 'c-type nil cfd-limit))
|
||
(and (< (point) cfd-limit)
|
||
(not (eq (c-get-char-property (1- (point)) 'c-type)
|
||
'c-decl-end)))))
|
||
(setq cfd-prop-match (point))))
|
||
|
||
;; Find the next `c-decl-prefix-re' match if we haven't got one already.
|
||
(unless cfd-re-match
|
||
(while (and (setq cfd-re-match
|
||
(re-search-forward c-decl-prefix-re cfd-limit 'move))
|
||
(c-got-face-at (1- (setq cfd-re-match (match-end 1)))
|
||
c-literal-faces))
|
||
;; Search again if the match is within a comment or a string literal.
|
||
(while (progn
|
||
(goto-char (next-single-property-change
|
||
cfd-re-match 'face nil cfd-limit))
|
||
(and (< (point) cfd-limit)
|
||
(c-got-face-at (point) c-literal-faces)))
|
||
(setq cfd-re-match (point))))
|
||
(unless cfd-re-match
|
||
(setq cfd-re-match cfd-limit)))
|
||
|
||
;; Choose whichever match is closer to the start.
|
||
(if (< cfd-re-match cfd-prop-match)
|
||
(setq cfd-match-pos cfd-re-match
|
||
cfd-re-match nil)
|
||
(setq cfd-match-pos cfd-prop-match
|
||
cfd-prop-match nil))
|
||
|
||
(goto-char cfd-match-pos)
|
||
|
||
(when (< cfd-match-pos cfd-limit)
|
||
;; Skip forward past comments only so we don't skip macros.
|
||
(c-forward-comments)
|
||
;; Set the position to continue at. We can avoid going over
|
||
;; the comments skipped above a second time, but it's possible
|
||
;; that the comment skipping has taken us past `cfd-prop-match'
|
||
;; since the property might be used inside comments.
|
||
(setq cfd-continue-pos (if cfd-prop-match
|
||
(min cfd-prop-match (point))
|
||
(point))))))
|
||
|
||
(defun c-find-decl-spots (cfd-limit cfd-decl-re cfd-face-checklist cfd-fun)
|
||
;; Call CFD-FUN for each possible spot for a declaration from the
|
||
;; point to CFD-LIMIT. A spot for a declaration is the first token
|
||
;; in the buffer and each token after the ones matched by
|
||
;; `c-decl-prefix-re' and after the occurrences of the `c-type'
|
||
;; property with the value `c-decl-end' (if `c-type-decl-end-used'
|
||
;; is set). Only a spot that match CFD-DECL-RE and whose face is in
|
||
;; the CFD-FACE-CHECKLIST list causes CFD-FUN to be called. The
|
||
;; face check is disabled if CFD-FACE-CHECKLIST is nil.
|
||
;;
|
||
;; If the match is inside a macro then the buffer is narrowed to the
|
||
;; end of it, so that CFD-FUN can investigate the following tokens
|
||
;; without matching something that begins inside a macro and ends
|
||
;; outside it. It's to avoid this work that the CFD-DECL-RE and
|
||
;; CFD-FACE-CHECKLIST checks exist.
|
||
;;
|
||
;; CFD-FUN is called with point at the start of the spot. It's
|
||
;; passed two arguments: The first is the end position of the token
|
||
;; that `c-decl-prefix-re' matched, or 0 for the implicit match at
|
||
;; bob. The second is a flag that is t when the match is inside a
|
||
;; macro.
|
||
;;
|
||
;; It's assumed that comment and strings are fontified in the
|
||
;; searched range.
|
||
;;
|
||
;; This is mainly used in fontification, and so has an elaborate
|
||
;; cache to handle repeated calls from the same start position; see
|
||
;; the variables above.
|
||
;;
|
||
;; All variables in this function begin with `cfd-' to avoid name
|
||
;; collision with the (dynamically bound) variables used in CFD-FUN.
|
||
|
||
(let ((cfd-buffer-end (point-max))
|
||
;; The last regexp match found by `c-find-decl-prefix-search'.
|
||
cfd-re-match
|
||
;; The last `c-decl-end' found by `c-find-decl-prefix-search'.
|
||
;; If searching for the property isn't needed then we disable
|
||
;; it by faking a first match at the limit.
|
||
(cfd-prop-match (unless c-type-decl-end-used cfd-limit))
|
||
;; The position of the last match found by
|
||
;; `c-find-decl-prefix-search'. For regexp matches it's the
|
||
;; end of the matched token, for property matches it's the end
|
||
;; of the property. 0 for the implicit match at bob.
|
||
;; `cfd-limit' if there's no match.
|
||
(cfd-match-pos cfd-limit)
|
||
;; The position to continue searching at.
|
||
cfd-continue-pos
|
||
;; The position of the last "real" token we've stopped at.
|
||
;; This can be greater than `cfd-continue-pos' when we get
|
||
;; hits inside macros or at `c-decl-end' positions inside
|
||
;; comments.
|
||
(cfd-token-pos 0)
|
||
;; The end position of the last entered macro.
|
||
(cfd-macro-end 0))
|
||
|
||
;; Initialize by finding a syntactically relevant start position
|
||
;; before the point, and do the first `c-decl-prefix-re' search
|
||
;; unless we're at bob.
|
||
|
||
(let ((start-pos (point)) syntactic-pos)
|
||
;; Must back up a bit since we look for the end of the previous
|
||
;; statement or declaration, which is earlier than the first
|
||
;; returned match.
|
||
|
||
(when (c-got-face-at (point) c-literal-faces)
|
||
;; But first we need to move to a syntactically relevant
|
||
;; position. Use the faces to back up to the start of the
|
||
;; comment or string literal.
|
||
(when (and (not (bobp))
|
||
(c-got-face-at (1- (point)) c-literal-faces))
|
||
(while (progn
|
||
(goto-char (previous-single-property-change
|
||
(point) 'face nil (point-min)))
|
||
(and (> (point) (point-min))
|
||
(c-got-face-at (point) c-literal-faces)))))
|
||
|
||
;; XEmacs doesn't fontify the quotes surrounding string
|
||
;; literals.
|
||
(and (featurep 'xemacs)
|
||
(eq (get-text-property (point) 'face)
|
||
'font-lock-string-face)
|
||
(not (bobp))
|
||
(progn (backward-char)
|
||
(not (looking-at c-string-limit-regexp)))
|
||
(forward-char))
|
||
|
||
;; The font lock package might not have fontified the start of
|
||
;; the literal at all so check that we have arrived at
|
||
;; something that looks like a start or else resort to
|
||
;; `c-literal-limits'.
|
||
(unless (looking-at c-literal-start-regexp)
|
||
(let ((range (c-literal-limits)))
|
||
(if range (goto-char (car range))))))
|
||
|
||
;; Must back out of any macro so that we don't miss any
|
||
;; declaration that could follow after it, unless the limit is
|
||
;; inside the macro. We only check that for the current line to
|
||
;; save some time; it's enough for the by far most common case
|
||
;; when font-lock refontifies the current line only.
|
||
(when (save-excursion
|
||
(and (= (forward-line 1) 0)
|
||
(or (< (c-point 'eol) cfd-limit)
|
||
(progn (backward-char)
|
||
(not (eq (char-before) ?\\))))))
|
||
(c-beginning-of-macro))
|
||
|
||
;; Clear the cache if it applied further down.
|
||
(c-invalidate-find-decl-cache start-pos)
|
||
|
||
(setq syntactic-pos (point))
|
||
(c-backward-syntactic-ws c-find-decl-syntactic-pos)
|
||
|
||
;; If we hit `c-find-decl-syntactic-pos' and
|
||
;; `c-find-decl-match-pos' is set then we install the cached
|
||
;; values. If we hit `c-find-decl-syntactic-pos' and
|
||
;; `c-find-decl-match-pos' is nil then we know there's no decl
|
||
;; prefix in the whitespace before `c-find-decl-syntactic-pos'
|
||
;; and so we can continue the search from this point. If we
|
||
;; didn't hit `c-find-decl-syntactic-pos' then we're now in the
|
||
;; right spot to begin searching anyway.
|
||
(if (and (eq (point) c-find-decl-syntactic-pos)
|
||
c-find-decl-match-pos)
|
||
|
||
(progn
|
||
;; The match is always outside macros and comments so we
|
||
;; start at the next token. The loop below will later go
|
||
;; back using `cfd-continue-pos' to fix declarations inside
|
||
;; the syntactic ws.
|
||
(goto-char syntactic-pos)
|
||
(c-forward-syntactic-ws)
|
||
(setq cfd-match-pos c-find-decl-match-pos
|
||
cfd-continue-pos syntactic-pos)
|
||
(if (< cfd-continue-pos (point))
|
||
(setq cfd-token-pos (point))))
|
||
|
||
(setq c-find-decl-syntactic-pos syntactic-pos)
|
||
|
||
(when (if (bobp)
|
||
;; Always consider bob a match to get the first declaration
|
||
;; in the file. Do this separately instead of letting
|
||
;; `c-decl-prefix-re' match bob, so that it always can
|
||
;; consume at least one character to ensure that we won't
|
||
;; get stuck in an infinite loop.
|
||
(setq cfd-re-match 0)
|
||
(backward-char)
|
||
(c-beginning-of-current-token)
|
||
(< (point) cfd-limit))
|
||
;; Do an initial search now. In the bob case above it's only done
|
||
;; to search for the `c-type' property.
|
||
(c-find-decl-prefix-search))
|
||
|
||
;; Advance `cfd-continue-pos' if we got a hit before the start
|
||
;; position. The earliest position that could affect after
|
||
;; the start position is the char before the preceding
|
||
;; comments.
|
||
(when (and cfd-continue-pos (< cfd-continue-pos start-pos))
|
||
(goto-char syntactic-pos)
|
||
(c-backward-comments)
|
||
(unless (bobp)
|
||
(backward-char)
|
||
(c-beginning-of-current-token))
|
||
(setq cfd-continue-pos (max cfd-continue-pos (point))))
|
||
|
||
;; If we got a match it's always outside macros and comments so
|
||
;; advance to the next token and set `cfd-token-pos'. The loop
|
||
;; below will later go back using `cfd-continue-pos' to fix
|
||
;; declarations inside the syntactic ws.
|
||
(when (and (< cfd-match-pos cfd-limit) (< (point) syntactic-pos))
|
||
(goto-char syntactic-pos)
|
||
(c-forward-syntactic-ws)
|
||
(and cfd-continue-pos
|
||
(< cfd-continue-pos (point))
|
||
(setq cfd-token-pos (point))))
|
||
|
||
(setq c-find-decl-match-pos (and (< cfd-match-pos start-pos)
|
||
cfd-match-pos))))
|
||
|
||
;; Now loop. We already got the first match.
|
||
|
||
(while (progn
|
||
(while (and
|
||
(< cfd-match-pos cfd-limit)
|
||
|
||
(or
|
||
;; Kludge to filter out matches on the "<" that
|
||
;; aren't open parens, for the sake of languages
|
||
;; that got `c-recognize-<>-arglists' set.
|
||
(and (eq (char-before cfd-match-pos) ?<)
|
||
(not (c-get-char-property (1- cfd-match-pos)
|
||
'syntax-table)))
|
||
|
||
;; If `cfd-continue-pos' is less or equal to
|
||
;; `cfd-token-pos', we've got a hit inside a macro
|
||
;; that's in the syntactic whitespace before the last
|
||
;; "real" declaration we've checked. If they're equal
|
||
;; we've arrived at the declaration a second time, so
|
||
;; there's nothing to do.
|
||
(= cfd-continue-pos cfd-token-pos)
|
||
|
||
(progn
|
||
;; If `cfd-continue-pos' is less than `cfd-token-pos'
|
||
;; we're still searching for declarations embedded in
|
||
;; the syntactic whitespace. In that case we need
|
||
;; only to skip comments and not macros, since they
|
||
;; can't be nested, and that's already been done in
|
||
;; `c-find-decl-prefix-search'.
|
||
(when (> cfd-continue-pos cfd-token-pos)
|
||
(c-forward-syntactic-ws)
|
||
(setq cfd-token-pos (point)))
|
||
|
||
;; Continue if the following token fails the
|
||
;; CFD-DECL-RE and CFD-FACE-CHECKLIST checks.
|
||
(when (or (>= (point) cfd-limit)
|
||
(not (looking-at cfd-decl-re))
|
||
(and cfd-face-checklist
|
||
(not (c-got-face-at
|
||
(point) cfd-face-checklist))))
|
||
(goto-char cfd-continue-pos)
|
||
t)))
|
||
|
||
(< (point) cfd-limit))
|
||
(c-find-decl-prefix-search))
|
||
|
||
(< (point) cfd-limit))
|
||
|
||
(when (progn
|
||
;; Narrow to the end of the macro if we got a hit inside
|
||
;; one, to avoid recognizing things that start inside
|
||
;; the macro and end outside it.
|
||
(when (> cfd-match-pos cfd-macro-end)
|
||
;; Not in the same macro as in the previous round.
|
||
(save-excursion
|
||
(goto-char cfd-match-pos)
|
||
(setq cfd-macro-end
|
||
(if (save-excursion (and (c-beginning-of-macro)
|
||
(< (point) cfd-match-pos)))
|
||
(progn (c-end-of-macro)
|
||
(point))
|
||
0))))
|
||
|
||
(if (zerop cfd-macro-end)
|
||
t
|
||
(if (> cfd-macro-end (point))
|
||
(progn (narrow-to-region (point-min) cfd-macro-end)
|
||
t)
|
||
;; The matched token was the last thing in the
|
||
;; macro, so the whole match is bogus.
|
||
(setq cfd-macro-end 0)
|
||
nil)))
|
||
|
||
(c-debug-put-decl-spot-faces cfd-match-pos (point))
|
||
(funcall cfd-fun cfd-match-pos (/= cfd-macro-end 0))
|
||
|
||
(when (/= cfd-macro-end 0)
|
||
;; Restore limits if we did macro narrowment above.
|
||
(narrow-to-region (point-min) cfd-buffer-end)))
|
||
|
||
(goto-char cfd-continue-pos)
|
||
(if (= cfd-continue-pos cfd-limit)
|
||
(setq cfd-match-pos cfd-limit)
|
||
(c-find-decl-prefix-search)))))
|
||
|
||
|
||
;; A cache for found types.
|
||
|
||
;; Buffer local variable that contains an obarray with the types we've
|
||
;; found. If a declaration is recognized somewhere we record the
|
||
;; fully qualified identifier in it to recognize it as a type
|
||
;; elsewhere in the file too. This is not accurate since we do not
|
||
;; bother with the scoping rules of the languages, but in practice the
|
||
;; same name is seldom used as both a type and something else in a
|
||
;; file, and we only use this as a last resort in ambiguous cases (see
|
||
;; `c-font-lock-declarations').
|
||
(defvar c-found-types nil)
|
||
(make-variable-buffer-local 'c-found-types)
|
||
|
||
(defsubst c-clear-found-types ()
|
||
;; Clears `c-found-types'.
|
||
;;
|
||
;; This function does not do any hidden buffer changes.
|
||
(setq c-found-types (make-vector 53 0)))
|
||
|
||
(defun c-add-type (from to)
|
||
;; Add the given region as a type in `c-found-types'. If the region
|
||
;; doesn't match an existing type but there is a type which is equal
|
||
;; to the given one except that the last character is missing, then
|
||
;; the shorter type is removed. That's done to avoid adding all
|
||
;; prefixes of a type as it's being entered and font locked. This
|
||
;; doesn't cover cases like when characters are removed from a type
|
||
;; or added in the middle. We'd need the position of point when the
|
||
;; font locking is invoked to solve this well.
|
||
(unless (and c-recognize-<>-arglists
|
||
(save-excursion
|
||
(goto-char from)
|
||
(c-syntactic-re-search-forward "<" to t)))
|
||
;; To avoid storing very long strings, do not add a type that
|
||
;; contains '<' in languages with angle bracket arglists, since
|
||
;; the type then probably contains a C++ template spec and those
|
||
;; can be fairly sized programs in themselves.
|
||
(let ((type (c-syntactic-content from to)))
|
||
(unless (intern-soft type c-found-types)
|
||
(unintern (substring type 0 -1) c-found-types)
|
||
(intern type c-found-types)))))
|
||
|
||
(defsubst c-check-type (from to)
|
||
;; Return non-nil if the given region contains a type in
|
||
;; `c-found-types'.
|
||
(intern-soft (c-syntactic-content from to) c-found-types))
|
||
|
||
(defun c-list-found-types ()
|
||
;; Return all the types in `c-found-types' as a sorted list of
|
||
;; strings.
|
||
(let (type-list)
|
||
(mapatoms (lambda (type)
|
||
(setq type-list (cons (symbol-name type)
|
||
type-list)))
|
||
c-found-types)
|
||
(sort type-list 'string-lessp)))
|
||
|
||
|
||
;; Handling of small scale constructs like types and names.
|
||
|
||
(defun c-remove-<>-arglist-properties (from to)
|
||
;; Remove all the properties put by `c-forward-<>-arglist' in the
|
||
;; specified region. Point is clobbered.
|
||
(goto-char from)
|
||
(while (progn (skip-chars-forward "^<>," to)
|
||
(< (point) to))
|
||
(if (eq (char-after) ?,)
|
||
(when (eq (c-get-char-property (point) 'c-type) 'c-<>-arg-sep)
|
||
(c-clear-char-property (point) 'c-type))
|
||
(c-clear-char-property (point) 'syntax-table))
|
||
(forward-char)))
|
||
|
||
;; Dynamically bound variable that instructs `c-forward-type' to also
|
||
;; treat possible types (i.e. those that it normally returns 'maybe or
|
||
;; 'found for) as actual types (and always return 'found for them).
|
||
;; This means that it records them in `c-record-type-identifiers' if
|
||
;; that is set, and that it adds them to `c-found-types'.
|
||
(defvar c-promote-possible-types nil)
|
||
|
||
;; Dynamically bound variable that instructs `c-forward-<>-arglist' to
|
||
;; not accept arglists that contain binary operators.
|
||
;;
|
||
;; This is primarily used to handle C++ template arglists. C++
|
||
;; disambiguates them by checking whether the preceding name is a
|
||
;; template or not. We can't do that, so we assume it is a template
|
||
;; if it can be parsed as one. That usually works well since
|
||
;; comparison expressions on the forms "a < b > c" or "a < b, c > d"
|
||
;; in almost all cases would be pointless.
|
||
;;
|
||
;; However, in function arglists, e.g. in "foo (a < b, c > d)", we
|
||
;; should let the comma separate the function arguments instead. And
|
||
;; in a context where the value of the expression is taken, e.g. in
|
||
;; "if (a < b || c > d)", it's probably not a template.
|
||
(defvar c-restricted-<>-arglists nil)
|
||
|
||
;; Dynamically bound variables that instructs `c-forward-name',
|
||
;; `c-forward-type' and `c-forward-<>-arglist' to record the ranges of
|
||
;; all the type and reference identifiers they encounter. They will
|
||
;; build lists on these variables where each element is a cons of the
|
||
;; buffer positions surrounding each identifier. This recording is
|
||
;; only activated when `c-record-type-identifiers' is non-nil.
|
||
;;
|
||
;; All known types that can't be identifiers are recorded, and also
|
||
;; other possible types if `c-promote-possible-types' is set.
|
||
;; Recording is however disabled inside angle bracket arglists that
|
||
;; are encountered inside names and other angle bracket arglists.
|
||
;; Such occurences are taken care of by `c-font-lock-<>-arglists'
|
||
;; instead.
|
||
;;
|
||
;; Only the names in C++ template style references (e.g. "tmpl" in
|
||
;; "tmpl<a,b>::foo") are recorded as references, other references
|
||
;; aren't handled here.
|
||
(defvar c-record-type-identifiers nil)
|
||
(defvar c-record-ref-identifiers nil)
|
||
|
||
;; If `c-record-type-identifiers' is set, this will receive a cons
|
||
;; cell of the range of the last single identifier symbol stepped over
|
||
;; by `c-forward-name' if it's successful. This is the range that
|
||
;; should be put on one of the record lists by the caller. It's
|
||
;; assigned nil if there's no such symbol in the name.
|
||
(defvar c-last-identifier-range nil)
|
||
|
||
(defmacro c-record-type-id (range)
|
||
(if (eq (car-safe range) 'cons)
|
||
;; Always true.
|
||
`(setq c-record-type-identifiers
|
||
(cons ,range c-record-type-identifiers))
|
||
`(let ((range ,range))
|
||
(if range
|
||
(setq c-record-type-identifiers
|
||
(cons range c-record-type-identifiers))))))
|
||
|
||
(defmacro c-record-ref-id (range)
|
||
(if (eq (car-safe range) 'cons)
|
||
;; Always true.
|
||
`(setq c-record-ref-identifiers
|
||
(cons ,range c-record-ref-identifiers))
|
||
`(let ((range ,range))
|
||
(if range
|
||
(setq c-record-ref-identifiers
|
||
(cons range c-record-ref-identifiers))))))
|
||
|
||
;; Dynamically bound variable that instructs `c-forward-type' to
|
||
;; record the ranges of types that only are found. Behaves otherwise
|
||
;; like `c-record-type-identifiers'.
|
||
(defvar c-record-found-types nil)
|
||
|
||
(defmacro c-forward-keyword-prefixed-id (type)
|
||
;; Used internally in `c-forward-keyword-clause' to move forward
|
||
;; over a type (if TYPE is 'type) or a name (otherwise) which
|
||
;; possibly is prefixed by keywords and their associated clauses.
|
||
;; Try with a type/name first to not trip up on those that begin
|
||
;; with a keyword. Return t if a known or found type is moved
|
||
;; over. The point is clobbered if nil is returned. If range
|
||
;; recording is enabled, the identifier is recorded on as a type
|
||
;; if TYPE is 'type or as a reference if TYPE is 'ref.
|
||
`(let (res)
|
||
(while (if (setq res ,(if (eq type 'type)
|
||
`(c-forward-type)
|
||
`(c-forward-name)))
|
||
nil
|
||
(and (looking-at c-keywords-regexp)
|
||
(c-forward-keyword-clause))))
|
||
(when (memq res '(t known found prefix))
|
||
,(when (eq type 'ref)
|
||
`(when c-record-type-identifiers
|
||
(c-record-ref-id c-last-identifier-range)))
|
||
t)))
|
||
|
||
(defmacro c-forward-id-comma-list (type)
|
||
;; Used internally in `c-forward-keyword-clause' to move forward
|
||
;; over a comma separated list of types or names using
|
||
;; `c-forward-keyword-prefixed-id'.
|
||
`(while (and (progn
|
||
(setq safe-pos (point))
|
||
(eq (char-after) ?,))
|
||
(progn
|
||
(forward-char)
|
||
(c-forward-syntactic-ws)
|
||
(c-forward-keyword-prefixed-id ,type)))))
|
||
|
||
(defun c-forward-keyword-clause ()
|
||
;; The first submatch in the current match data is assumed to
|
||
;; surround a token. If it's a keyword, move over it and any
|
||
;; following clauses associated with it, stopping at the next
|
||
;; following token. t is returned in that case, otherwise the point
|
||
;; stays and nil is returned. The kind of clauses that are
|
||
;; recognized are those specified by `c-type-list-kwds',
|
||
;; `c-ref-list-kwds', `c-colon-type-list-kwds',
|
||
;; `c-paren-nontype-kwds', `c-paren-type-kwds', `c-<>-type-kwds',
|
||
;; and `c-<>-arglist-kwds'.
|
||
|
||
(let ((kwd-sym (c-keyword-sym (match-string 1))) safe-pos pos)
|
||
(when kwd-sym
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)
|
||
(setq safe-pos (point))
|
||
|
||
(cond
|
||
((and (c-keyword-member kwd-sym 'c-type-list-kwds)
|
||
(c-forward-keyword-prefixed-id type))
|
||
;; There's a type directly after a keyword in `c-type-list-kwds'.
|
||
(c-forward-id-comma-list type))
|
||
|
||
((and (c-keyword-member kwd-sym 'c-ref-list-kwds)
|
||
(c-forward-keyword-prefixed-id ref))
|
||
;; There's a name directly after a keyword in `c-ref-list-kwds'.
|
||
(c-forward-id-comma-list ref))
|
||
|
||
((and (c-keyword-member kwd-sym 'c-paren-any-kwds)
|
||
(eq (char-after) ?\())
|
||
;; There's an open paren after a keyword in `c-paren-any-kwds'.
|
||
|
||
(forward-char)
|
||
(when (and (setq pos (c-up-list-forward))
|
||
(eq (char-before pos) ?\)))
|
||
(when (and c-record-type-identifiers
|
||
(c-keyword-member kwd-sym 'c-paren-type-kwds))
|
||
;; Use `c-forward-type' on every identifier we can find
|
||
;; inside the paren, to record the types.
|
||
(while (c-syntactic-re-search-forward c-symbol-start pos t)
|
||
(goto-char (match-beginning 0))
|
||
(unless (c-forward-type)
|
||
(looking-at c-symbol-key) ; Always matches.
|
||
(goto-char (match-end 0)))))
|
||
|
||
(goto-char pos)
|
||
(c-forward-syntactic-ws)
|
||
(setq safe-pos (point))))
|
||
|
||
((and (c-keyword-member kwd-sym 'c-<>-sexp-kwds)
|
||
(eq (char-after) ?<)
|
||
(c-forward-<>-arglist (c-keyword-member kwd-sym 'c-<>-type-kwds)
|
||
(or c-record-type-identifiers
|
||
c-restricted-<>-arglists)))
|
||
(c-forward-syntactic-ws)
|
||
(setq safe-pos (point)))
|
||
|
||
((and (c-keyword-member kwd-sym 'c-nonsymbol-sexp-kwds)
|
||
(not (looking-at c-symbol-start))
|
||
(c-safe (c-forward-sexp) t))
|
||
(c-forward-syntactic-ws)
|
||
(setq safe-pos (point))))
|
||
|
||
(when (and (c-keyword-member kwd-sym 'c-colon-type-list-kwds)
|
||
(progn
|
||
;; If a keyword matched both one of the types above and
|
||
;; this one, we match `c-colon-type-list-re' after the
|
||
;; clause matched above.
|
||
(goto-char safe-pos)
|
||
(looking-at c-colon-type-list-re))
|
||
(progn
|
||
(goto-char (match-end 0))
|
||
(c-forward-syntactic-ws)
|
||
(c-forward-keyword-prefixed-id type)))
|
||
;; There's a type after the `c-colon-type-list-re'
|
||
;; match after a keyword in `c-colon-type-list-kwds'.
|
||
(c-forward-id-comma-list type))
|
||
|
||
(goto-char safe-pos)
|
||
t)))
|
||
|
||
(defun c-forward-<>-arglist (all-types reparse)
|
||
;; The point is assumed to be at a '<'. Try to treat it as the open
|
||
;; paren of an angle bracket arglist and move forward to the the
|
||
;; corresponding '>'. If successful, the point is left after the
|
||
;; '>' and t is returned, otherwise the point isn't moved and nil is
|
||
;; returned. If ALL-TYPES is t then all encountered arguments in
|
||
;; the arglist that might be types are treated as found types.
|
||
;;
|
||
;; The surrounding '<' and '>' are given syntax-table properties to
|
||
;; make them behave like parentheses. Each argument separating ','
|
||
;; is also set to `c-<>-arg-sep' in the `c-type' property. These
|
||
;; properties are also cleared in a relevant region forward from the
|
||
;; point if they seems to be set and it turns out to not be an
|
||
;; arglist.
|
||
;;
|
||
;; If the arglist has been successfully parsed before then paren
|
||
;; syntax properties will be exploited to quickly jump to the end,
|
||
;; but that can be disabled by setting REPARSE to t. That is
|
||
;; necessary if the various side effects, e.g. recording of type
|
||
;; ranges, are important. Setting REPARSE to t only applies
|
||
;; recursively to nested angle bracket arglists if
|
||
;; `c-restricted-<>-arglists' is set.
|
||
|
||
(let ((start (point))
|
||
;; If `c-record-type-identifiers' is set then activate
|
||
;; recording of any found types that constitute an argument in
|
||
;; the arglist.
|
||
(c-record-found-types (if c-record-type-identifiers t)))
|
||
(if (catch 'angle-bracket-arglist-escape
|
||
(setq c-record-found-types
|
||
(c-forward-<>-arglist-recur all-types reparse)))
|
||
(progn
|
||
(when (consp c-record-found-types)
|
||
(setq c-record-type-identifiers
|
||
;; `nconc' doesn't mind that the tail of
|
||
;; `c-record-found-types' is t.
|
||
(nconc c-record-found-types c-record-type-identifiers)))
|
||
t)
|
||
|
||
(goto-char start)
|
||
nil)))
|
||
|
||
(defun c-forward-<>-arglist-recur (all-types reparse)
|
||
;; Recursive part of `c-forward-<>-arglist'.
|
||
|
||
(let ((start (point)) res pos tmp
|
||
;; Cover this so that any recorded found type ranges are
|
||
;; automatically lost if it turns out to not be an angle
|
||
;; bracket arglist. It's propagated through the return value
|
||
;; on successful completion.
|
||
(c-record-found-types c-record-found-types)
|
||
;; List that collects the positions after the argument
|
||
;; separating ',' in the arglist.
|
||
arg-start-pos)
|
||
|
||
;; If the '<' has paren open syntax then we've marked it as an
|
||
;; angle bracket arglist before, so try to skip to the end and see
|
||
;; that the close paren matches.
|
||
(if (and (c-get-char-property (point) 'syntax-table)
|
||
(progn
|
||
(forward-char)
|
||
(if (and (not (looking-at c-<-op-cont-regexp))
|
||
(if (c-parse-sexp-lookup-properties)
|
||
(c-go-up-list-forward)
|
||
(catch 'at-end
|
||
(let ((depth 1))
|
||
(while (c-syntactic-re-search-forward
|
||
"[<>]" nil t t)
|
||
(when (c-get-char-property (1- (point))
|
||
'syntax-table)
|
||
(if (eq (char-before) ?<)
|
||
(setq depth (1+ depth))
|
||
(setq depth (1- depth))
|
||
(when (= depth 0) (throw 'at-end t)))))
|
||
nil)))
|
||
(not (looking-at c->-op-cont-regexp))
|
||
(save-excursion
|
||
(backward-char)
|
||
(= (point)
|
||
(progn (c-beginning-of-current-token)
|
||
(point)))))
|
||
|
||
;; Got an arglist that appears to be valid.
|
||
(if reparse
|
||
;; Reparsing is requested, so zap the properties in the
|
||
;; region and go on to redo it. It's done here to
|
||
;; avoid leaving it behind if we exit through
|
||
;; `angle-bracket-arglist-escape' below.
|
||
(progn
|
||
(c-remove-<>-arglist-properties start (point))
|
||
(goto-char start)
|
||
nil)
|
||
t)
|
||
|
||
;; Got unmatched paren brackets or either paren was
|
||
;; actually some other token. Recover by clearing the
|
||
;; syntax properties on all the '<' and '>' in the
|
||
;; range where we'll search for the arglist below.
|
||
(goto-char start)
|
||
(while (progn (skip-chars-forward "^<>,;{}")
|
||
(looking-at "[<>,]"))
|
||
(if (eq (char-after) ?,)
|
||
(when (eq (c-get-char-property (point) 'c-type)
|
||
'c-<>-arg-sep)
|
||
(c-clear-char-property (point) 'c-type))
|
||
(c-clear-char-property (point) 'syntax-table))
|
||
(forward-char))
|
||
(goto-char start)
|
||
nil)))
|
||
t
|
||
|
||
(forward-char)
|
||
(unless (looking-at c-<-op-cont-regexp)
|
||
(while (and
|
||
(progn
|
||
|
||
(when c-record-type-identifiers
|
||
(if all-types
|
||
|
||
;; All encountered identifiers are types, so set the
|
||
;; promote flag and parse the type.
|
||
(progn
|
||
(c-forward-syntactic-ws)
|
||
(when (looking-at c-identifier-start)
|
||
(let ((c-promote-possible-types t))
|
||
(c-forward-type))))
|
||
|
||
;; Check if this arglist argument is a sole type. If
|
||
;; it's known then it's recorded in
|
||
;; `c-record-type-identifiers'. If it only is found
|
||
;; then it's recorded in `c-record-found-types' which we
|
||
;; might roll back if it turns out that this isn't an
|
||
;; angle bracket arglist afterall.
|
||
(when (memq (char-before) '(?, ?<))
|
||
(let ((orig-record-found-types c-record-found-types))
|
||
(c-forward-syntactic-ws)
|
||
(and (memq (c-forward-type) '(known found))
|
||
(not (looking-at "[,>]"))
|
||
;; A found type was recorded but it's not the
|
||
;; only thing in the arglist argument, so reset
|
||
;; `c-record-found-types'.
|
||
(setq c-record-found-types
|
||
orig-record-found-types))))))
|
||
|
||
(setq pos (point))
|
||
(or (when (eq (char-after) ?>)
|
||
;; Must check for '>' at the very start separately,
|
||
;; since the regexp below has to avoid ">>" without
|
||
;; using \\=.
|
||
(forward-char)
|
||
t)
|
||
|
||
;; Note: These regexps exploit the match order in \| so
|
||
;; that "<>" is matched by "<" rather than "[^>:-]>".
|
||
(c-syntactic-re-search-forward
|
||
(if c-restricted-<>-arglists
|
||
;; Stop on ',', '|', '&', '+' and '-' to catch
|
||
;; common binary operators that could be between
|
||
;; two comparison expressions "a<b" and "c>d".
|
||
"[<;{},|&+-]\\|\\([^>:-]>\\)"
|
||
;; Otherwise we still stop on ',' to find the
|
||
;; argument start positions.
|
||
"[<;{},]\\|\\([^>:-]>\\)")
|
||
nil 'move t t 1)
|
||
|
||
;; If the arglist starter has lost its open paren
|
||
;; syntax but not the closer, we won't find the
|
||
;; closer above since we only search in the
|
||
;; balanced sexp. In that case we stop just short
|
||
;; of it so check if the following char is the closer.
|
||
(when (eq (char-after) ?>)
|
||
;; Remove its syntax so that we don't enter the
|
||
;; recovery code below. That's not necessary
|
||
;; since there's no real reason to suspect that
|
||
;; things inside the arglist are unbalanced.
|
||
(c-clear-char-property (point) 'syntax-table)
|
||
(forward-char)
|
||
t)))
|
||
|
||
(cond
|
||
((eq (char-before) ?>)
|
||
;; Either an operator starting with '>' or the end of
|
||
;; the angle bracket arglist.
|
||
|
||
(if (and (/= (1- (point)) pos)
|
||
(c-get-char-property (1- (point)) 'syntax-table)
|
||
(progn
|
||
(c-clear-char-property (1- (point)) 'syntax-table)
|
||
(c-parse-sexp-lookup-properties)))
|
||
|
||
;; We've skipped past a list that ended with '>'. It
|
||
;; must be unbalanced since nested arglists are handled
|
||
;; in the case below. Recover by removing all paren
|
||
;; properties on '<' and '>' in the searched region and
|
||
;; redo the search.
|
||
(progn
|
||
(c-remove-<>-arglist-properties pos (point))
|
||
(goto-char pos)
|
||
t)
|
||
|
||
(if (looking-at c->-op-cont-regexp)
|
||
(progn
|
||
(when (text-property-not-all
|
||
(1- (point)) (match-end 0) 'syntax-table nil)
|
||
(c-remove-<>-arglist-properties (1- (point))
|
||
(match-end 0)))
|
||
(goto-char (match-end 0))
|
||
t)
|
||
|
||
;; The angle bracket arglist is finished.
|
||
(while arg-start-pos
|
||
(c-put-char-property (1- (car arg-start-pos))
|
||
'c-type 'c-<>-arg-sep)
|
||
(setq arg-start-pos (cdr arg-start-pos)))
|
||
(c-mark-<-as-paren start)
|
||
(c-mark->-as-paren (1- (point)))
|
||
(setq res t)
|
||
nil)))
|
||
|
||
((eq (char-before) ?<)
|
||
;; Either an operator starting with '<' or a nested arglist.
|
||
|
||
(setq pos (point))
|
||
(let (id-start id-end subres keyword-match)
|
||
(if (if (looking-at c-<-op-cont-regexp)
|
||
(setq tmp (match-end 0))
|
||
(setq tmp pos)
|
||
(backward-char)
|
||
(not
|
||
(and
|
||
|
||
(save-excursion
|
||
;; There's always an identifier before a angle
|
||
;; bracket arglist, or a keyword in
|
||
;; `c-<>-type-kwds' or `c-<>-arglist-kwds'.
|
||
(c-backward-syntactic-ws)
|
||
(setq id-end (point))
|
||
(c-simple-skip-symbol-backward)
|
||
(when (or (setq keyword-match
|
||
(looking-at c-opt-<>-sexp-key))
|
||
(not (looking-at c-keywords-regexp)))
|
||
(setq id-start (point))))
|
||
|
||
(setq subres
|
||
(let ((c-record-type-identifiers nil)
|
||
(c-record-found-types nil))
|
||
(c-forward-<>-arglist-recur
|
||
(and keyword-match
|
||
(c-keyword-member
|
||
(c-keyword-sym (match-string 1))
|
||
'c-<>-type-kwds))
|
||
(and reparse
|
||
c-restricted-<>-arglists))))
|
||
)))
|
||
|
||
;; It was not an angle bracket arglist.
|
||
(progn
|
||
(when (text-property-not-all
|
||
(1- pos) tmp 'syntax-table nil)
|
||
(if (c-parse-sexp-lookup-properties)
|
||
;; Got an invalid open paren syntax on this
|
||
;; '<'. We'll probably get an unbalanced '>'
|
||
;; further ahead if we just remove the syntax
|
||
;; here, so recover by removing all paren
|
||
;; properties up to and including the
|
||
;; balancing close paren.
|
||
(parse-partial-sexp pos (point-max) -1)
|
||
(goto-char tmp))
|
||
(c-remove-<>-arglist-properties pos (point)))
|
||
(goto-char tmp))
|
||
|
||
;; It was an angle bracket arglist.
|
||
(setq c-record-found-types subres)
|
||
|
||
;; Record the identifier before the template as a type
|
||
;; or reference depending on whether the arglist is last
|
||
;; in a qualified identifier.
|
||
(when (and c-record-type-identifiers
|
||
(not keyword-match))
|
||
(if (and c-opt-identifier-concat-key
|
||
(progn
|
||
(c-forward-syntactic-ws)
|
||
(looking-at c-opt-identifier-concat-key)))
|
||
(c-record-ref-id (cons id-start id-end))
|
||
(c-record-type-id (cons id-start id-end))))))
|
||
t)
|
||
|
||
((and (eq (char-before) ?,)
|
||
(not c-restricted-<>-arglists))
|
||
;; Just another argument. Record the position. The
|
||
;; type check stuff that made us stop at it is at
|
||
;; the top of the loop.
|
||
(setq arg-start-pos (cons (point) arg-start-pos)))
|
||
|
||
(t
|
||
;; Got a character that can't be in an angle bracket
|
||
;; arglist argument. Abort using `throw', since
|
||
;; it's useless to try to find a surrounding arglist
|
||
;; if we're nested.
|
||
(throw 'angle-bracket-arglist-escape nil))))))
|
||
|
||
(if res
|
||
(or c-record-found-types t)))))
|
||
|
||
(defun c-forward-name ()
|
||
;; Move forward over a complete name if at the beginning of one,
|
||
;; stopping at the next following token. If the point is not at
|
||
;; something that are recognized as name then it stays put. A name
|
||
;; could be something as simple as "foo" in C or something as
|
||
;; complex as "X<Y<class A<int>::B, BIT_MAX >> b>, ::operator<> ::
|
||
;; Z<(a>b)> :: operator const X<&foo>::T Q::G<unsigned short
|
||
;; int>::*volatile const" in C++ (this function is actually little
|
||
;; more than a `looking-at' call in all modes except those that,
|
||
;; like C++, have `c-recognize-<>-arglists' set). Return nil if no
|
||
;; name is found, 'template if it's an identifier ending with an
|
||
;; angle bracket arglist, 'operator of it's an operator identifier,
|
||
;; or t if it's some other kind of name.
|
||
|
||
(let ((pos (point)) res id-start id-end
|
||
;; Turn off `c-promote-possible-types' here since we might
|
||
;; call `c-forward-<>-arglist' and we don't want it to promote
|
||
;; every suspect thing in the arglist to a type. We're
|
||
;; typically called from `c-forward-type' in this case, and
|
||
;; the caller only wants the top level type that it finds to
|
||
;; be promoted.
|
||
c-promote-possible-types)
|
||
(while
|
||
(and
|
||
(looking-at c-identifier-key)
|
||
|
||
(progn
|
||
;; Check for keyword. We go to the last symbol in
|
||
;; `c-identifier-key' first.
|
||
(if (eq c-identifier-key c-symbol-key)
|
||
(setq id-start (point)
|
||
id-end (match-end 0))
|
||
(goto-char (setq id-end (match-end 0)))
|
||
(c-simple-skip-symbol-backward)
|
||
(setq id-start (point)))
|
||
|
||
(if (looking-at c-keywords-regexp)
|
||
(when (and (c-major-mode-is 'c++-mode)
|
||
(looking-at
|
||
(cc-eval-when-compile
|
||
(concat "\\(operator\\|\\(template\\)\\)"
|
||
"\\(" (c-lang-const c-nonsymbol-key c++)
|
||
"\\|$\\)")))
|
||
(if (match-beginning 2)
|
||
;; "template" is only valid inside an
|
||
;; identifier if preceded by "::".
|
||
(save-excursion
|
||
(c-backward-syntactic-ws)
|
||
(and (c-safe (backward-char 2) t)
|
||
(looking-at "::")))
|
||
t))
|
||
|
||
;; Handle a C++ operator or template identifier.
|
||
(goto-char id-end)
|
||
(c-forward-syntactic-ws)
|
||
(cond ((eq (char-before id-end) ?e)
|
||
;; Got "... ::template".
|
||
(let ((subres (c-forward-name)))
|
||
(when subres
|
||
(setq pos (point)
|
||
res subres))))
|
||
|
||
((looking-at c-identifier-start)
|
||
;; Got a cast operator.
|
||
(when (c-forward-type)
|
||
(setq pos (point)
|
||
res 'operator)
|
||
;; Now we should match a sequence of either
|
||
;; '*', '&' or a name followed by ":: *",
|
||
;; where each can be followed by a sequence
|
||
;; of `c-opt-type-modifier-key'.
|
||
(while (cond ((looking-at "[*&]")
|
||
(goto-char (match-end 0))
|
||
t)
|
||
((looking-at c-identifier-start)
|
||
(and (c-forward-name)
|
||
(looking-at "::")
|
||
(progn
|
||
(goto-char (match-end 0))
|
||
(c-forward-syntactic-ws)
|
||
(eq (char-after) ?*))
|
||
(progn
|
||
(forward-char)
|
||
t))))
|
||
(while (progn
|
||
(c-forward-syntactic-ws)
|
||
(setq pos (point))
|
||
(looking-at c-opt-type-modifier-key))
|
||
(goto-char (match-end 1))))))
|
||
|
||
((looking-at c-overloadable-operators-regexp)
|
||
;; Got some other operator.
|
||
(when c-record-type-identifiers
|
||
(setq c-last-identifier-range
|
||
(cons (point) (match-end 0))))
|
||
(goto-char (match-end 0))
|
||
(c-forward-syntactic-ws)
|
||
(setq pos (point)
|
||
res 'operator)))
|
||
|
||
nil)
|
||
|
||
(when c-record-type-identifiers
|
||
(setq c-last-identifier-range
|
||
(cons id-start id-end)))
|
||
(goto-char id-end)
|
||
(c-forward-syntactic-ws)
|
||
(setq pos (point)
|
||
res t)))
|
||
|
||
(progn
|
||
(goto-char pos)
|
||
(when (or c-opt-identifier-concat-key
|
||
c-recognize-<>-arglists)
|
||
|
||
(cond
|
||
((and c-opt-identifier-concat-key
|
||
(looking-at c-opt-identifier-concat-key))
|
||
;; Got a concatenated identifier. This handles the
|
||
;; cases with tricky syntactic whitespace that aren't
|
||
;; covered in `c-identifier-key'.
|
||
(goto-char (match-end 0))
|
||
(c-forward-syntactic-ws)
|
||
t)
|
||
|
||
((and c-recognize-<>-arglists
|
||
(eq (char-after) ?<))
|
||
;; Maybe an angle bracket arglist.
|
||
(when (let ((c-record-type-identifiers nil)
|
||
(c-record-found-types nil))
|
||
(c-forward-<>-arglist
|
||
nil c-restricted-<>-arglists))
|
||
(c-forward-syntactic-ws)
|
||
(setq pos (point))
|
||
(if (and c-opt-identifier-concat-key
|
||
(looking-at c-opt-identifier-concat-key))
|
||
;; Continue if there's an identifier concatenation
|
||
;; operator after the template argument.
|
||
(progn
|
||
(when c-record-type-identifiers
|
||
(c-record-ref-id (cons id-start id-end))
|
||
(setq c-last-identifier-range nil))
|
||
(forward-char 2)
|
||
(c-forward-syntactic-ws)
|
||
t)
|
||
;; `c-add-type' isn't called here since we don't
|
||
;; want to add types containing angle bracket
|
||
;; arglists.
|
||
(when c-record-type-identifiers
|
||
(c-record-type-id (cons id-start id-end))
|
||
(setq c-last-identifier-range nil))
|
||
(setq res 'template)
|
||
nil)))
|
||
)))))
|
||
|
||
(goto-char pos)
|
||
res))
|
||
|
||
(defun c-forward-type ()
|
||
;; Move forward over a type spec if at the beginning of one,
|
||
;; stopping at the next following token. Return t if it's a known
|
||
;; type that can't be a name or other expression, 'known if it's an
|
||
;; otherwise known type (according to `*-font-lock-extra-types'),
|
||
;; 'prefix if it's a known prefix of a type, 'found if it's a type
|
||
;; that matches one in `c-found-types', 'maybe if it's an identfier
|
||
;; that might be a type, or nil if it can't be a type (the point
|
||
;; isn't moved then). The point is assumed to be at the beginning
|
||
;; of a token.
|
||
;;
|
||
;; Note that this function doesn't skip past the brace definition
|
||
;; that might be considered part of the type, e.g.
|
||
;; "enum {a, b, c} foo".
|
||
(let ((start (point)) pos res res2 id-start id-end id-range)
|
||
|
||
;; Skip leading type modifiers. If any are found we know it's a
|
||
;; prefix of a type.
|
||
(when c-opt-type-modifier-key
|
||
(while (looking-at c-opt-type-modifier-key)
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)
|
||
(setq res 'prefix)))
|
||
|
||
(cond
|
||
((looking-at c-type-prefix-key)
|
||
;; Looking at a keyword that prefixes a type identifier,
|
||
;; e.g. "class".
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)
|
||
(setq pos (point))
|
||
(if (memq (setq res2 (c-forward-name)) '(t template))
|
||
(progn
|
||
(when (eq res2 t)
|
||
;; In many languages the name can be used without the
|
||
;; prefix, so we add it to `c-found-types'.
|
||
(c-add-type pos (point))
|
||
(when c-record-type-identifiers
|
||
(c-record-type-id c-last-identifier-range)))
|
||
(setq res t))
|
||
;; Invalid syntax.
|
||
(goto-char start)
|
||
(setq res nil)))
|
||
|
||
((progn
|
||
(setq pos nil)
|
||
(if (looking-at c-identifier-start)
|
||
(save-excursion
|
||
(setq id-start (point)
|
||
res2 (c-forward-name))
|
||
(when res2
|
||
(setq id-end (point)
|
||
id-range c-last-identifier-range))))
|
||
(and (cond ((looking-at c-primitive-type-key)
|
||
(setq res t))
|
||
((c-with-syntax-table c-identifier-syntax-table
|
||
(looking-at c-known-type-key))
|
||
(setq res 'known)))
|
||
(or (not id-end)
|
||
(>= (save-excursion
|
||
(save-match-data
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)
|
||
(setq pos (point))))
|
||
id-end)
|
||
(setq res nil))))
|
||
;; Looking at a primitive or known type identifier. We've
|
||
;; checked for a name first so that we don't go here if the
|
||
;; known type match only is a prefix of another name.
|
||
|
||
(setq id-end (match-end 1))
|
||
|
||
(when (and c-record-type-identifiers
|
||
(or c-promote-possible-types (eq res t)))
|
||
(c-record-type-id (cons (match-beginning 1) (match-end 1))))
|
||
|
||
(if (and c-opt-type-component-key
|
||
(save-match-data
|
||
(looking-at c-opt-type-component-key)))
|
||
;; There might be more keywords for the type.
|
||
(let (safe-pos)
|
||
(c-forward-keyword-clause)
|
||
(while (progn
|
||
(setq safe-pos (point))
|
||
(looking-at c-opt-type-component-key))
|
||
(when (and c-record-type-identifiers
|
||
(looking-at c-primitive-type-key))
|
||
(c-record-type-id (cons (match-beginning 1)
|
||
(match-end 1))))
|
||
(c-forward-keyword-clause))
|
||
(if (looking-at c-primitive-type-key)
|
||
(progn
|
||
(when c-record-type-identifiers
|
||
(c-record-type-id (cons (match-beginning 1)
|
||
(match-end 1))))
|
||
(c-forward-keyword-clause)
|
||
(setq res t))
|
||
(goto-char safe-pos)
|
||
(setq res 'prefix)))
|
||
(unless (save-match-data (c-forward-keyword-clause))
|
||
(if pos
|
||
(goto-char pos)
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)))))
|
||
|
||
(res2
|
||
(cond ((eq res2 t)
|
||
;; A normal identifier.
|
||
(goto-char id-end)
|
||
(if (or res c-promote-possible-types)
|
||
(progn
|
||
(c-add-type id-start id-end)
|
||
(when c-record-type-identifiers
|
||
(c-record-type-id id-range))
|
||
(unless res
|
||
(setq res 'found)))
|
||
(setq res (if (c-check-type id-start id-end)
|
||
;; It's an identifier that has been used as
|
||
;; a type somewhere else.
|
||
'found
|
||
;; It's an identifier that might be a type.
|
||
'maybe))))
|
||
((eq res2 'template)
|
||
;; A template is a type.
|
||
(goto-char id-end)
|
||
(setq res t))
|
||
(t
|
||
;; Otherwise it's an operator identifier, which is not a type.
|
||
(goto-char start)
|
||
(setq res nil)))))
|
||
|
||
(when res
|
||
;; Skip trailing type modifiers. If any are found we know it's
|
||
;; a type.
|
||
(when c-opt-type-modifier-key
|
||
(while (looking-at c-opt-type-modifier-key)
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)
|
||
(setq res t)))
|
||
|
||
;; Step over any type suffix operator. Do not let the existence
|
||
;; of these alter the classification of the found type, since
|
||
;; these operators typically are allowed in normal expressions
|
||
;; too.
|
||
(when c-opt-type-suffix-key
|
||
(while (looking-at c-opt-type-suffix-key)
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)))
|
||
|
||
(when c-opt-type-concat-key
|
||
;; Look for a trailing operator that concatenate the type with
|
||
;; a following one, and if so step past that one through a
|
||
;; recursive call.
|
||
(setq pos (point))
|
||
(let* ((c-promote-possible-types (or (memq res '(t known))
|
||
c-promote-possible-types))
|
||
;; If we can't promote then set `c-record-found-types' so that
|
||
;; we can merge in the types from the second part afterwards if
|
||
;; it turns out to be a known type there.
|
||
(c-record-found-types (and c-record-type-identifiers
|
||
(not c-promote-possible-types))))
|
||
(if (and (looking-at c-opt-type-concat-key)
|
||
|
||
(progn
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws)
|
||
(setq res2 (c-forward-type))))
|
||
|
||
(progn
|
||
;; If either operand certainly is a type then both are, but we
|
||
;; don't let the existence of the operator itself promote two
|
||
;; uncertain types to a certain one.
|
||
(cond ((eq res t))
|
||
((eq res2 t)
|
||
(c-add-type id-start id-end)
|
||
(when c-record-type-identifiers
|
||
(c-record-type-id id-range))
|
||
(setq res t))
|
||
((eq res 'known))
|
||
((eq res2 'known)
|
||
(setq res 'known))
|
||
((eq res 'found))
|
||
((eq res2 'found)
|
||
(setq res 'found))
|
||
(t
|
||
(setq res 'maybe)))
|
||
|
||
(when (and (eq res t)
|
||
(consp c-record-found-types))
|
||
;; Merge in the ranges of any types found by the second
|
||
;; `c-forward-type'.
|
||
(setq c-record-type-identifiers
|
||
;; `nconc' doesn't mind that the tail of
|
||
;; `c-record-found-types' is t.
|
||
(nconc c-record-found-types
|
||
c-record-type-identifiers))))
|
||
|
||
(goto-char pos))))
|
||
|
||
(when (and c-record-found-types (memq res '(known found)) id-range)
|
||
(setq c-record-found-types
|
||
(cons id-range c-record-found-types))))
|
||
|
||
;;(message "c-forward-type %s -> %s: %s" start (point) res)
|
||
|
||
res))
|
||
|
||
|
||
;; Handling of large scale constructs like statements and declarations.
|
||
|
||
(defun c-beginning-of-inheritance-list (&optional lim)
|
||
;; Go to the first non-whitespace after the colon that starts a
|
||
;; multiple inheritance introduction. Optional LIM is the farthest
|
||
;; back we should search.
|
||
(let* ((lim (or lim (save-excursion
|
||
(c-beginning-of-syntax)
|
||
(point)))))
|
||
(c-with-syntax-table c++-template-syntax-table
|
||
(c-backward-token-2 0 t lim)
|
||
(while (and (or (looking-at c-symbol-start)
|
||
(looking-at "[<,]\\|::"))
|
||
(zerop (c-backward-token-2 1 t lim))))
|
||
(skip-chars-forward "^:"))))
|
||
|
||
(defun c-in-method-def-p ()
|
||
;; Return nil if we aren't in a method definition, otherwise the
|
||
;; position of the initial [+-].
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(and c-opt-method-key
|
||
(looking-at c-opt-method-key)
|
||
(point))
|
||
))
|
||
|
||
;; Contributed by Kevin Ryde <user42@zip.com.au>.
|
||
(defun c-in-gcc-asm-p ()
|
||
;; Return non-nil if point is within a gcc \"asm\" block.
|
||
;;
|
||
;; This should be called with point inside an argument list.
|
||
;;
|
||
;; Only one level of enclosing parentheses is considered, so for
|
||
;; instance `nil' is returned when in a function call within an asm
|
||
;; operand.
|
||
|
||
(and c-opt-asm-stmt-key
|
||
(save-excursion
|
||
(beginning-of-line)
|
||
(backward-up-list 1)
|
||
(c-beginning-of-statement-1 (point-min) nil t)
|
||
(looking-at c-opt-asm-stmt-key))))
|
||
|
||
(defun c-at-toplevel-p ()
|
||
"Return a determination as to whether point is at the `top-level'.
|
||
Being at the top-level means that point is either outside any
|
||
enclosing block (such function definition), or only inside a class,
|
||
namespace or other block that contains another declaration level.
|
||
|
||
If point is not at the top-level (e.g. it is inside a method
|
||
definition), then nil is returned. Otherwise, if point is at a
|
||
top-level not enclosed within a class definition, t is returned.
|
||
Otherwise, a 2-vector is returned where the zeroth element is the
|
||
buffer position of the start of the class declaration, and the first
|
||
element is the buffer position of the enclosing class's opening
|
||
brace."
|
||
(let ((paren-state (c-parse-state)))
|
||
(or (not (c-most-enclosing-brace paren-state))
|
||
(c-search-uplist-for-classkey paren-state))))
|
||
|
||
(defun c-just-after-func-arglist-p (&optional lim)
|
||
;; Return non-nil if we are between a function's argument list closing
|
||
;; paren and its opening brace. Note that the list close brace
|
||
;; could be followed by a "const" specifier or a member init hanging
|
||
;; colon. LIM is used as bound for some backward buffer searches;
|
||
;; the search might continue past it.
|
||
;;
|
||
;; Note: This test is easily fooled. It only works reasonably well
|
||
;; in the situations where `c-guess-basic-syntax' uses it.
|
||
(save-excursion
|
||
(if (c-mode-is-new-awk-p)
|
||
(c-awk-backward-syntactic-ws lim)
|
||
(c-backward-syntactic-ws lim))
|
||
(let ((checkpoint (point)))
|
||
;; could be looking at const specifier
|
||
(if (and (eq (char-before) ?t)
|
||
(forward-word -1)
|
||
(looking-at "\\<const\\>[^_]"))
|
||
(c-backward-syntactic-ws lim)
|
||
;; otherwise, we could be looking at a hanging member init
|
||
;; colon
|
||
(goto-char checkpoint)
|
||
(while (and
|
||
(eq (char-before) ?,)
|
||
;; this will catch member inits with multiple
|
||
;; line arglists
|
||
(progn
|
||
(forward-char -1)
|
||
(c-backward-syntactic-ws (c-point 'bol))
|
||
(c-safe (c-backward-sexp 1) t))
|
||
(or (not (looking-at "\\s\("))
|
||
(c-safe (c-backward-sexp 1) t)))
|
||
(c-backward-syntactic-ws lim))
|
||
(if (and (eq (char-before) ?:)
|
||
(progn
|
||
(forward-char -1)
|
||
(c-backward-syntactic-ws lim)
|
||
(looking-at "\\([ \t\n]\\|\\\\\n\\)*:\\([^:]+\\|$\\)")))
|
||
nil
|
||
(goto-char checkpoint))
|
||
)
|
||
(setq checkpoint (point))
|
||
(and (eq (char-before) ?\))
|
||
;; Check that it isn't a cpp expression, e.g. the
|
||
;; expression of an #if directive or the "function header"
|
||
;; of a #define.
|
||
(or (not (c-beginning-of-macro))
|
||
(and (c-forward-to-cpp-define-body)
|
||
(< (point) checkpoint)))
|
||
;; Check if we are looking at an ObjC method def or a class
|
||
;; category.
|
||
(not (and c-opt-method-key
|
||
(progn
|
||
(goto-char checkpoint)
|
||
(c-safe (c-backward-sexp) t))
|
||
(progn
|
||
(c-backward-syntactic-ws lim)
|
||
(or (memq (char-before) '(?- ?+))
|
||
(and (c-safe (c-forward-sexp -2) t)
|
||
(looking-at c-class-key))))))
|
||
;; Pike has compound types that include parens,
|
||
;; e.g. "array(string)". Check that we aren't after one.
|
||
(not (and (c-major-mode-is 'pike-mode)
|
||
(progn
|
||
(goto-char checkpoint)
|
||
(c-safe (c-backward-sexp 2) t))
|
||
(looking-at c-primitive-type-key)))
|
||
))))
|
||
|
||
(defun c-in-knr-argdecl (&optional lim)
|
||
;; Return the position of the first argument declaration if point is
|
||
;; inside a K&R style argument declaration list, nil otherwise.
|
||
;; `c-recognize-knr-p' is not checked. If LIM is non-nil, it's a
|
||
;; position that bounds the backward search for the argument list.
|
||
;;
|
||
;; Note: A declaration level context is assumed; the test can return
|
||
;; false positives for statements.
|
||
|
||
(save-excursion
|
||
(save-restriction
|
||
|
||
;; Go back to the closest preceding normal parenthesis sexp. We
|
||
;; take that as the argument list in the function header. Then
|
||
;; check that it's followed by some symbol before the next ';'
|
||
;; or '{'. If it does, it's the header of the K&R argdecl we're
|
||
;; in.
|
||
(if lim (narrow-to-region lim (c-point 'eol)))
|
||
(let ((outside-macro (not (c-query-macro-start)))
|
||
paren-end)
|
||
|
||
(catch 'done
|
||
(while (if (and (setq paren-end (c-down-list-backward (point)))
|
||
(eq (char-after paren-end) ?\)))
|
||
(progn
|
||
(goto-char (1+ paren-end))
|
||
(if outside-macro
|
||
(c-beginning-of-macro)))
|
||
(throw 'done nil))))
|
||
|
||
(and (progn
|
||
(c-forward-syntactic-ws)
|
||
(looking-at "\\w\\|\\s_"))
|
||
|
||
(save-excursion
|
||
;; The function header in a K&R declaration should only
|
||
;; contain identifiers separated by comma. It should
|
||
;; also contain at least one identifier since there
|
||
;; wouldn't be anything to declare in the K&R region
|
||
;; otherwise.
|
||
(when (c-go-up-list-backward paren-end)
|
||
(forward-char)
|
||
(catch 'knr-ok
|
||
(while t
|
||
(c-forward-syntactic-ws)
|
||
(if (or (looking-at c-known-type-key)
|
||
(looking-at c-keywords-regexp))
|
||
(throw 'knr-ok nil))
|
||
(c-forward-token-2)
|
||
(if (eq (char-after) ?,)
|
||
(forward-char)
|
||
(throw 'knr-ok (and (eq (char-after) ?\))
|
||
(= (point) paren-end))))))))
|
||
|
||
(save-excursion
|
||
;; If it's a K&R declaration then we're now at the
|
||
;; beginning of the function arglist. Check that there
|
||
;; isn't a '=' before it in this statement since that
|
||
;; means it some kind of initialization instead.
|
||
(c-syntactic-skip-backward "^;=}{")
|
||
(not (eq (char-before) ?=)))
|
||
|
||
(point))))))
|
||
|
||
(defun c-skip-conditional ()
|
||
;; skip forward over conditional at point, including any predicate
|
||
;; statements in parentheses. No error checking is performed.
|
||
(c-forward-sexp (cond
|
||
;; else if()
|
||
((looking-at (concat "\\<else"
|
||
"\\([ \t\n]\\|\\\\\n\\)+"
|
||
"if\\>\\([^_]\\|$\\)"))
|
||
3)
|
||
;; do, else, try, finally
|
||
((looking-at (concat "\\<\\("
|
||
"do\\|else\\|try\\|finally"
|
||
"\\)\\>\\([^_]\\|$\\)"))
|
||
1)
|
||
;; for, if, while, switch, catch, synchronized, foreach
|
||
(t 2))))
|
||
|
||
(defun c-after-conditional (&optional lim)
|
||
;; If looking at the token after a conditional then return the
|
||
;; position of its start, otherwise return nil.
|
||
(save-excursion
|
||
(and (zerop (c-backward-token-2 1 t lim))
|
||
(or (looking-at c-block-stmt-1-key)
|
||
(and (eq (char-after) ?\()
|
||
(zerop (c-backward-token-2 1 t lim))
|
||
(looking-at c-block-stmt-2-key)))
|
||
(point))))
|
||
|
||
(defsubst c-backward-to-block-anchor (&optional lim)
|
||
;; Assuming point is at a brace that opens a statement block of some
|
||
;; kind, move to the proper anchor point for that block. It might
|
||
;; need to be adjusted further by c-add-stmt-syntax, but the
|
||
;; position at return is suitable as start position for that
|
||
;; function.
|
||
(unless (= (point) (c-point 'boi))
|
||
(let ((start (c-after-conditional lim)))
|
||
(if start
|
||
(goto-char start)))))
|
||
|
||
(defsubst c-backward-to-decl-anchor (&optional lim)
|
||
;; Assuming point is at a brace that opens the block of a top level
|
||
;; declaration of some kind, move to the proper anchor point for
|
||
;; that block.
|
||
(unless (= (point) (c-point 'boi))
|
||
(c-beginning-of-statement-1 lim)))
|
||
|
||
(defun c-search-decl-header-end ()
|
||
;; Search forward for the end of the "header" of the current
|
||
;; declaration. That's the position where the definition body
|
||
;; starts, or the first variable initializer, or the ending
|
||
;; semicolon. I.e. search forward for the closest following
|
||
;; (syntactically relevant) '{', '=' or ';' token. Point is left
|
||
;; _after_ the first found token, or at point-max if none is found.
|
||
|
||
(let ((base (point)))
|
||
(if (c-major-mode-is 'c++-mode)
|
||
|
||
;; In C++ we need to take special care to handle operator
|
||
;; tokens and those pesky template brackets.
|
||
(while (and
|
||
(c-syntactic-re-search-forward "[;{<=]" nil 'move t t)
|
||
(or
|
||
(c-end-of-current-token base)
|
||
;; Handle operator identifiers, i.e. ignore any
|
||
;; operator token preceded by "operator".
|
||
(save-excursion
|
||
(and (c-safe (c-backward-sexp) t)
|
||
(looking-at "operator\\([^_]\\|$\\)")))
|
||
(and (eq (char-before) ?<)
|
||
(c-with-syntax-table c++-template-syntax-table
|
||
(if (c-safe (goto-char (c-up-list-forward (point))))
|
||
t
|
||
(goto-char (point-max))
|
||
nil)))))
|
||
(setq base (point)))
|
||
|
||
(while (and
|
||
(c-syntactic-re-search-forward "[;{=]" nil 'move t t)
|
||
(c-end-of-current-token base))
|
||
(setq base (point))))))
|
||
|
||
(defun c-beginning-of-decl-1 (&optional lim)
|
||
;; Go to the beginning of the current declaration, or the beginning
|
||
;; of the previous one if already at the start of it. Point won't
|
||
;; be moved out of any surrounding paren. Return a cons cell on the
|
||
;; form (MOVE . KNR-POS). MOVE is like the return value from
|
||
;; `c-beginning-of-statement-1'. If point skipped over some K&R
|
||
;; style argument declarations (and they are to be recognized) then
|
||
;; KNR-POS is set to the start of the first such argument
|
||
;; declaration, otherwise KNR-POS is nil. If LIM is non-nil, it's a
|
||
;; position that bounds the backward search.
|
||
;;
|
||
;; NB: Cases where the declaration continues after the block, as in
|
||
;; "struct foo { ... } bar;", are currently recognized as two
|
||
;; declarations, e.g. "struct foo { ... }" and "bar;" in this case.
|
||
(catch 'return
|
||
(let* ((start (point))
|
||
(last-stmt-start (point))
|
||
(move (c-beginning-of-statement-1 lim t t)))
|
||
|
||
;; `c-beginning-of-statement-1' stops at a block start, but we
|
||
;; want to continue if the block doesn't begin a top level
|
||
;; construct, i.e. if it isn't preceded by ';', '}', ':', bob,
|
||
;; or an open paren.
|
||
(let ((beg (point)) tentative-move)
|
||
(while (and
|
||
;; Must check with c-opt-method-key in ObjC mode.
|
||
(not (and c-opt-method-key
|
||
(looking-at c-opt-method-key)))
|
||
(/= last-stmt-start (point))
|
||
(progn
|
||
(c-backward-syntactic-ws lim)
|
||
(not (memq (char-before) '(?\; ?} ?: nil))))
|
||
(save-excursion
|
||
(backward-char)
|
||
(not (looking-at "\\s(")))
|
||
;; Check that we don't move from the first thing in a
|
||
;; macro to its header.
|
||
(not (eq (setq tentative-move
|
||
(c-beginning-of-statement-1 lim t t))
|
||
'macro)))
|
||
(setq last-stmt-start beg
|
||
beg (point)
|
||
move tentative-move))
|
||
(goto-char beg))
|
||
|
||
(when c-recognize-knr-p
|
||
(let ((fallback-pos (point)) knr-argdecl-start)
|
||
;; Handle K&R argdecls. Back up after the "statement" jumped
|
||
;; over by `c-beginning-of-statement-1', unless it was the
|
||
;; function body, in which case we're sitting on the opening
|
||
;; brace now. Then test if we're in a K&R argdecl region and
|
||
;; that we started at the other side of the first argdecl in
|
||
;; it.
|
||
(unless (eq (char-after) ?{)
|
||
(goto-char last-stmt-start))
|
||
(if (and (setq knr-argdecl-start (c-in-knr-argdecl lim))
|
||
(< knr-argdecl-start start)
|
||
(progn
|
||
(goto-char knr-argdecl-start)
|
||
(not (eq (c-beginning-of-statement-1 lim t t) 'macro))))
|
||
(throw 'return
|
||
(cons (if (eq (char-after fallback-pos) ?{)
|
||
'previous
|
||
'same)
|
||
knr-argdecl-start))
|
||
(goto-char fallback-pos))))
|
||
|
||
(when c-opt-access-key
|
||
;; Might have ended up before a protection label. This should
|
||
;; perhaps be checked before `c-recognize-knr-p' to be really
|
||
;; accurate, but we know that no language has both.
|
||
(while (looking-at c-opt-access-key)
|
||
(goto-char (match-end 0))
|
||
(c-forward-syntactic-ws)
|
||
(when (>= (point) start)
|
||
(goto-char start)
|
||
(throw 'return (cons 'same nil)))))
|
||
|
||
;; `c-beginning-of-statement-1' counts each brace block as a
|
||
;; separate statement, so the result will be 'previous if we've
|
||
;; moved over any. If they were brace list initializers we might
|
||
;; not have moved over a declaration boundary though, so change it
|
||
;; to 'same if we've moved past a '=' before '{', but not ';'.
|
||
;; (This ought to be integrated into `c-beginning-of-statement-1',
|
||
;; so we avoid this extra pass which potentially can search over a
|
||
;; large amount of text.)
|
||
(if (and (eq move 'previous)
|
||
(c-with-syntax-table (if (c-major-mode-is 'c++-mode)
|
||
c++-template-syntax-table
|
||
(syntax-table))
|
||
(save-excursion
|
||
(and (c-syntactic-re-search-forward "[;={]" start t t t)
|
||
(eq (char-before) ?=)
|
||
(c-syntactic-re-search-forward "[;{]" start t t)
|
||
(eq (char-before) ?{)
|
||
(c-safe (goto-char (c-up-list-forward (point))) t)
|
||
(not (c-syntactic-re-search-forward ";" start t t))))))
|
||
(cons 'same nil)
|
||
(cons move nil)))))
|
||
|
||
(defun c-end-of-decl-1 ()
|
||
;; Assuming point is at the start of a declaration (as detected by
|
||
;; e.g. `c-beginning-of-decl-1'), go to the end of it. Unlike
|
||
;; `c-beginning-of-decl-1', this function handles the case when a
|
||
;; block is followed by identifiers in e.g. struct declarations in C
|
||
;; or C++. If a proper end was found then t is returned, otherwise
|
||
;; point is moved as far as possible within the current sexp and nil
|
||
;; is returned. This function doesn't handle macros; use
|
||
;; `c-end-of-macro' instead in those cases.
|
||
(let ((start (point))
|
||
(decl-syntax-table (if (c-major-mode-is 'c++-mode)
|
||
c++-template-syntax-table
|
||
(syntax-table))))
|
||
(catch 'return
|
||
(c-search-decl-header-end)
|
||
|
||
(when (and c-recognize-knr-p
|
||
(eq (char-before) ?\;)
|
||
(c-in-knr-argdecl start))
|
||
;; Stopped at the ';' in a K&R argdecl section which is
|
||
;; detected using the same criteria as in
|
||
;; `c-beginning-of-decl-1'. Move to the following block
|
||
;; start.
|
||
(c-syntactic-re-search-forward "{" nil 'move t))
|
||
|
||
(when (eq (char-before) ?{)
|
||
;; Encountered a block in the declaration. Jump over it.
|
||
(condition-case nil
|
||
(goto-char (c-up-list-forward (point)))
|
||
(error (goto-char (point-max))
|
||
(throw 'return nil)))
|
||
(if (or (not c-opt-block-decls-with-vars-key)
|
||
(save-excursion
|
||
(c-with-syntax-table decl-syntax-table
|
||
(let ((lim (point)))
|
||
(goto-char start)
|
||
(not (and
|
||
;; Check for `c-opt-block-decls-with-vars-key'
|
||
;; before the first paren.
|
||
(c-syntactic-re-search-forward
|
||
(concat "[;=\(\[{]\\|\\("
|
||
c-opt-block-decls-with-vars-key
|
||
"\\)")
|
||
lim t t t)
|
||
(match-beginning 1)
|
||
(not (eq (char-before) ?_))
|
||
;; Check that the first following paren is
|
||
;; the block.
|
||
(c-syntactic-re-search-forward "[;=\(\[{]"
|
||
lim t t t)
|
||
(eq (char-before) ?{)))))))
|
||
;; The declaration doesn't have any of the
|
||
;; `c-opt-block-decls-with-vars' keywords in the
|
||
;; beginning, so it ends here at the end of the block.
|
||
(throw 'return t)))
|
||
|
||
(c-with-syntax-table decl-syntax-table
|
||
(while (progn
|
||
(if (eq (char-before) ?\;)
|
||
(throw 'return t))
|
||
(c-syntactic-re-search-forward ";" nil 'move t))))
|
||
nil)))
|
||
|
||
(defun c-beginning-of-member-init-list (&optional limit)
|
||
;; Go to the beginning of a member init list (i.e. just after the
|
||
;; ':') if inside one. Returns t in that case, nil otherwise.
|
||
(or limit
|
||
(setq limit (point-min)))
|
||
(skip-chars-forward " \t")
|
||
|
||
(if (eq (char-after) ?,)
|
||
(forward-char 1)
|
||
(c-backward-syntactic-ws limit))
|
||
|
||
(catch 'exit
|
||
(while (and (< limit (point))
|
||
(eq (char-before) ?,))
|
||
|
||
;; this will catch member inits with multiple
|
||
;; line arglists
|
||
(forward-char -1)
|
||
(c-backward-syntactic-ws limit)
|
||
(if (eq (char-before) ?\))
|
||
(unless (c-safe (c-backward-sexp 1))
|
||
(throw 'exit nil)))
|
||
(c-backward-syntactic-ws limit)
|
||
|
||
;; Skip over any template arg to the class. This way with a
|
||
;; syntax table is bogus but it'll have to do for now.
|
||
(if (and (eq (char-before) ?>)
|
||
(c-major-mode-is 'c++-mode))
|
||
(c-with-syntax-table c++-template-syntax-table
|
||
(unless (c-safe (c-backward-sexp 1))
|
||
(throw 'exit nil))))
|
||
(c-safe (c-backward-sexp 1))
|
||
(c-backward-syntactic-ws limit)
|
||
|
||
;; Skip backwards over a fully::qualified::name.
|
||
(while (and (eq (char-before) ?:)
|
||
(save-excursion
|
||
(forward-char -1)
|
||
(eq (char-before) ?:)))
|
||
(backward-char 2)
|
||
(c-safe (c-backward-sexp 1)))
|
||
|
||
;; If we've stepped over a number then this is a bitfield.
|
||
(when (and c-opt-bitfield-key
|
||
(looking-at "[0-9]"))
|
||
(throw 'exit nil))
|
||
|
||
;; now continue checking
|
||
(c-backward-syntactic-ws limit))
|
||
|
||
(and (< limit (point))
|
||
(eq (char-before) ?:))))
|
||
|
||
(defun c-search-uplist-for-classkey (paren-state)
|
||
;; search for the containing class, returning a 2 element vector if
|
||
;; found. aref 0 contains the bufpos of the boi of the class key
|
||
;; line, and aref 1 contains the bufpos of the open brace.
|
||
(if (null paren-state)
|
||
;; no paren-state means we cannot be inside a class
|
||
nil
|
||
(let ((carcache (car paren-state))
|
||
search-start search-end)
|
||
(if (consp carcache)
|
||
;; a cons cell in the first element means that there is some
|
||
;; balanced sexp before the current bufpos. this we can
|
||
;; ignore. the nth 1 and nth 2 elements define for us the
|
||
;; search boundaries
|
||
(setq search-start (nth 2 paren-state)
|
||
search-end (nth 1 paren-state))
|
||
;; if the car was not a cons cell then nth 0 and nth 1 define
|
||
;; for us the search boundaries
|
||
(setq search-start (nth 1 paren-state)
|
||
search-end (nth 0 paren-state)))
|
||
;; if search-end is nil, or if the search-end character isn't an
|
||
;; open brace, we are definitely not in a class
|
||
(if (or (not search-end)
|
||
(< search-end (point-min))
|
||
(not (eq (char-after search-end) ?{)))
|
||
nil
|
||
;; now, we need to look more closely at search-start. if
|
||
;; search-start is nil, then our start boundary is really
|
||
;; point-min.
|
||
(if (not search-start)
|
||
(setq search-start (point-min))
|
||
;; if search-start is a cons cell, then we can start
|
||
;; searching from the end of the balanced sexp just ahead of
|
||
;; us
|
||
(if (consp search-start)
|
||
(setq search-start (cdr search-start))
|
||
;; Otherwise we start searching within the surrounding paren sexp.
|
||
(setq search-start (1+ search-start))))
|
||
;; now we can do a quick regexp search from search-start to
|
||
;; search-end and see if we can find a class key. watch for
|
||
;; class like strings in literals
|
||
(save-excursion
|
||
(save-restriction
|
||
(goto-char search-start)
|
||
(let (foundp class match-end)
|
||
(while (and (not foundp)
|
||
(progn
|
||
(c-forward-syntactic-ws search-end)
|
||
(> search-end (point)))
|
||
;; Add one to the search limit, to allow
|
||
;; matching of the "{" in the regexp.
|
||
(re-search-forward c-decl-block-key
|
||
(1+ search-end)
|
||
t))
|
||
(setq class (match-beginning 0)
|
||
match-end (match-end 0))
|
||
(goto-char class)
|
||
(if (c-in-literal search-start)
|
||
(goto-char match-end) ; its in a comment or string, ignore
|
||
(c-skip-ws-forward)
|
||
(setq foundp (vector (c-point 'boi) search-end))
|
||
(cond
|
||
;; check for embedded keywords
|
||
((let ((char (char-after (1- class))))
|
||
(and char
|
||
(memq (char-syntax char) '(?w ?_))))
|
||
(goto-char match-end)
|
||
(setq foundp nil))
|
||
;; make sure we're really looking at the start of a
|
||
;; class definition, and not an ObjC method.
|
||
((and c-opt-method-key
|
||
(re-search-forward c-opt-method-key search-end t)
|
||
(not (c-in-literal class)))
|
||
(setq foundp nil))
|
||
;; Check if this is an anonymous inner class.
|
||
((and c-opt-inexpr-class-key
|
||
(looking-at c-opt-inexpr-class-key))
|
||
(while (and (zerop (c-forward-token-2 1 t))
|
||
(looking-at "(\\|\\w\\|\\s_\\|\\.")))
|
||
(if (eq (point) search-end)
|
||
;; We're done. Just trap this case in the cond.
|
||
nil
|
||
;; False alarm; all conditions aren't satisfied.
|
||
(setq foundp nil)))
|
||
;; Its impossible to define a regexp for this, and
|
||
;; nearly so to do it programmatically.
|
||
;;
|
||
;; ; picks up forward decls
|
||
;; = picks up init lists
|
||
;; ) picks up return types
|
||
;; > picks up templates, but remember that we can
|
||
;; inherit from templates!
|
||
((let ((skipchars "^;=)"))
|
||
;; try to see if we found the `class' keyword
|
||
;; inside a template arg list
|
||
(save-excursion
|
||
(skip-chars-backward "^<>" search-start)
|
||
(if (eq (char-before) ?<)
|
||
(setq skipchars (concat skipchars ">"))))
|
||
(while (progn
|
||
(skip-chars-forward skipchars search-end)
|
||
(c-in-literal class))
|
||
(forward-char))
|
||
(/= (point) search-end))
|
||
(setq foundp nil))
|
||
)))
|
||
foundp))
|
||
)))))
|
||
|
||
(defun c-inside-bracelist-p (containing-sexp paren-state)
|
||
;; return the buffer position of the beginning of the brace list
|
||
;; statement if we're inside a brace list, otherwise return nil.
|
||
;; CONTAINING-SEXP is the buffer pos of the innermost containing
|
||
;; paren. BRACE-STATE is the remainder of the state of enclosing
|
||
;; braces
|
||
;;
|
||
;; N.B.: This algorithm can potentially get confused by cpp macros
|
||
;; places in inconvenient locations. Its a trade-off we make for
|
||
;; speed.
|
||
(or
|
||
;; This will pick up brace list declarations.
|
||
(c-safe
|
||
(save-excursion
|
||
(goto-char containing-sexp)
|
||
(c-forward-sexp -1)
|
||
(let (bracepos)
|
||
(if (and (or (looking-at c-brace-list-key)
|
||
(progn (c-forward-sexp -1)
|
||
(looking-at c-brace-list-key)))
|
||
(setq bracepos (c-down-list-forward (point)))
|
||
(not (c-crosses-statement-barrier-p (point)
|
||
(- bracepos 2))))
|
||
(point)))))
|
||
;; this will pick up array/aggregate init lists, even if they are nested.
|
||
(save-excursion
|
||
(let ((class-key
|
||
;; Pike can have class definitions anywhere, so we must
|
||
;; check for the class key here.
|
||
(and (c-major-mode-is 'pike-mode)
|
||
c-decl-block-key))
|
||
bufpos braceassignp lim next-containing)
|
||
(while (and (not bufpos)
|
||
containing-sexp)
|
||
(when paren-state
|
||
(if (consp (car paren-state))
|
||
(setq lim (cdr (car paren-state))
|
||
paren-state (cdr paren-state))
|
||
(setq lim (car paren-state)))
|
||
(when paren-state
|
||
(setq next-containing (car paren-state)
|
||
paren-state (cdr paren-state))))
|
||
(goto-char containing-sexp)
|
||
(if (c-looking-at-inexpr-block next-containing next-containing)
|
||
;; We're in an in-expression block of some kind. Do not
|
||
;; check nesting. We deliberately set the limit to the
|
||
;; containing sexp, so that c-looking-at-inexpr-block
|
||
;; doesn't check for an identifier before it.
|
||
(setq containing-sexp nil)
|
||
;; see if the open brace is preceded by = or [...] in
|
||
;; this statement, but watch out for operator=
|
||
(setq braceassignp 'dontknow)
|
||
(c-backward-token-2 1 t lim)
|
||
;; Checks to do only on the first sexp before the brace.
|
||
(when (and c-opt-inexpr-brace-list-key
|
||
(eq (char-after) ?\[))
|
||
;; In Java, an initialization brace list may follow
|
||
;; directly after "new Foo[]", so check for a "new"
|
||
;; earlier.
|
||
(while (eq braceassignp 'dontknow)
|
||
(setq braceassignp
|
||
(cond ((/= (c-backward-token-2 1 t lim) 0) nil)
|
||
((looking-at c-opt-inexpr-brace-list-key) t)
|
||
((looking-at "\\sw\\|\\s_\\|[.[]")
|
||
;; Carry on looking if this is an
|
||
;; identifier (may contain "." in Java)
|
||
;; or another "[]" sexp.
|
||
'dontknow)
|
||
(t nil)))))
|
||
;; Checks to do on all sexps before the brace, up to the
|
||
;; beginning of the statement.
|
||
(while (eq braceassignp 'dontknow)
|
||
(cond ((eq (char-after) ?\;)
|
||
(setq braceassignp nil))
|
||
((and class-key
|
||
(looking-at class-key))
|
||
(setq braceassignp nil))
|
||
((eq (char-after) ?=)
|
||
;; We've seen a =, but must check earlier tokens so
|
||
;; that it isn't something that should be ignored.
|
||
(setq braceassignp 'maybe)
|
||
(while (and (eq braceassignp 'maybe)
|
||
(zerop (c-backward-token-2 1 t lim)))
|
||
(setq braceassignp
|
||
(cond
|
||
;; Check for operator =
|
||
((looking-at "operator\\>[^_]") nil)
|
||
;; Check for `<opchar>= in Pike.
|
||
((and (c-major-mode-is 'pike-mode)
|
||
(or (eq (char-after) ?`)
|
||
;; Special case for Pikes
|
||
;; `[]=, since '[' is not in
|
||
;; the punctuation class.
|
||
(and (eq (char-after) ?\[)
|
||
(eq (char-before) ?`))))
|
||
nil)
|
||
((looking-at "\\s.") 'maybe)
|
||
;; make sure we're not in a C++ template
|
||
;; argument assignment
|
||
((and
|
||
(c-major-mode-is 'c++-mode)
|
||
(save-excursion
|
||
(let ((here (point))
|
||
(pos< (progn
|
||
(skip-chars-backward "^<>")
|
||
(point))))
|
||
(and (eq (char-before) ?<)
|
||
(not (c-crosses-statement-barrier-p
|
||
pos< here))
|
||
(not (c-in-literal))
|
||
))))
|
||
nil)
|
||
(t t))))))
|
||
(if (and (eq braceassignp 'dontknow)
|
||
(/= (c-backward-token-2 1 t lim) 0))
|
||
(setq braceassignp nil)))
|
||
(if (not braceassignp)
|
||
(if (eq (char-after) ?\;)
|
||
;; Brace lists can't contain a semicolon, so we're done.
|
||
(setq containing-sexp nil)
|
||
;; Go up one level.
|
||
(setq containing-sexp next-containing
|
||
lim nil
|
||
next-containing nil))
|
||
;; we've hit the beginning of the aggregate list
|
||
(c-beginning-of-statement-1
|
||
(c-most-enclosing-brace paren-state))
|
||
(setq bufpos (point))))
|
||
)
|
||
bufpos))
|
||
))
|
||
|
||
(defun c-looking-at-special-brace-list (&optional lim)
|
||
;; If we're looking at the start of a pike-style list, ie `({<7B>})',
|
||
;; `([<5B>])', `(<<3C>>)' etc, a cons of a cons of its starting and ending
|
||
;; positions and its entry in c-special-brace-lists is returned, nil
|
||
;; otherwise. The ending position is nil if the list is still open.
|
||
;; LIM is the limit for forward search. The point may either be at
|
||
;; the `(' or at the following paren character. Tries to check the
|
||
;; matching closer, but assumes it's correct if no balanced paren is
|
||
;; found (i.e. the case `({ ... } ... )' is detected as _not_ being
|
||
;; a special brace list).
|
||
(if c-special-brace-lists
|
||
(condition-case ()
|
||
(save-excursion
|
||
(let ((beg (point))
|
||
inner-beg end type)
|
||
(c-forward-syntactic-ws)
|
||
(if (eq (char-after) ?\()
|
||
(progn
|
||
(forward-char 1)
|
||
(c-forward-syntactic-ws)
|
||
(setq inner-beg (point))
|
||
(setq type (assq (char-after) c-special-brace-lists)))
|
||
(if (setq type (assq (char-after) c-special-brace-lists))
|
||
(progn
|
||
(setq inner-beg (point))
|
||
(c-backward-syntactic-ws)
|
||
(forward-char -1)
|
||
(setq beg (if (eq (char-after) ?\()
|
||
(point)
|
||
nil)))))
|
||
(if (and beg type)
|
||
(if (and (c-safe
|
||
(goto-char beg)
|
||
(c-forward-sexp 1)
|
||
(setq end (point))
|
||
(= (char-before) ?\)))
|
||
(c-safe
|
||
(goto-char inner-beg)
|
||
(if (looking-at "\\s(")
|
||
;; Check balancing of the inner paren
|
||
;; below.
|
||
(progn
|
||
(c-forward-sexp 1)
|
||
t)
|
||
;; If the inner char isn't a paren then
|
||
;; we can't check balancing, so just
|
||
;; check the char before the outer
|
||
;; closing paren.
|
||
(goto-char end)
|
||
(backward-char)
|
||
(c-backward-syntactic-ws)
|
||
(= (char-before) (cdr type)))))
|
||
(if (or (/= (char-syntax (char-before)) ?\))
|
||
(= (progn
|
||
(c-forward-syntactic-ws)
|
||
(point))
|
||
(1- end)))
|
||
(cons (cons beg end) type))
|
||
(cons (list beg) type)))))
|
||
(error nil))))
|
||
|
||
(defun c-looking-at-bos (&optional lim)
|
||
;; Return non-nil if between two statements or declarations, assuming
|
||
;; point is not inside a literal or comment.
|
||
(save-excursion
|
||
(c-backward-syntactic-ws lim)
|
||
(or (bobp)
|
||
;; Return t if at the start inside some parenthesis expression
|
||
;; too, to catch macros that have statements as arguments.
|
||
(memq (char-before) '(?\; ?} ?\())
|
||
(and (eq (char-before) ?{)
|
||
(not (and c-special-brace-lists
|
||
(progn (backward-char)
|
||
(c-looking-at-special-brace-list))))))))
|
||
|
||
(defun c-looking-at-inexpr-block (lim containing-sexp)
|
||
;; Returns non-nil if we're looking at the beginning of a block
|
||
;; inside an expression. The value returned is actually a cons of
|
||
;; either 'inlambda, 'inexpr-statement or 'inexpr-class and the
|
||
;; position of the beginning of the construct. LIM limits the
|
||
;; backward search. CONTAINING-SEXP is the start position of the
|
||
;; closest containing list. If it's nil, the containing paren isn't
|
||
;; used to decide whether we're inside an expression or not. If
|
||
;; both LIM and CONTAINING-SEXP is used, LIM needs to be farther
|
||
;; back.
|
||
(save-excursion
|
||
(let ((res 'maybe) passed-bracket
|
||
(closest-lim (or containing-sexp lim (point-min)))
|
||
;; Look at the character after point only as a last resort
|
||
;; when we can't disambiguate.
|
||
(block-follows (and (eq (char-after) ?{) (point))))
|
||
(while (and (eq res 'maybe)
|
||
(progn (c-backward-syntactic-ws)
|
||
(> (point) closest-lim))
|
||
(not (bobp))
|
||
(progn (backward-char)
|
||
(looking-at "[\]\).]\\|\\w\\|\\s_"))
|
||
(progn (forward-char)
|
||
(goto-char (scan-sexps (point) -1))))
|
||
(setq res
|
||
(cond
|
||
((and block-follows
|
||
c-opt-inexpr-class-key
|
||
(looking-at c-opt-inexpr-class-key))
|
||
(and (not passed-bracket)
|
||
(or (not (looking-at c-class-key))
|
||
;; If the class definition is at the start of
|
||
;; a statement, we don't consider it an
|
||
;; in-expression class.
|
||
(let ((prev (point)))
|
||
(while (and
|
||
(= (c-backward-token-2 1 nil closest-lim) 0)
|
||
(eq (char-syntax (char-after)) ?w))
|
||
(setq prev (point)))
|
||
(goto-char prev)
|
||
(not (c-looking-at-bos)))
|
||
;; Also, in Pike we treat it as an
|
||
;; in-expression class if it's used in an
|
||
;; object clone expression.
|
||
(save-excursion
|
||
(and (c-major-mode-is 'pike-mode)
|
||
(progn (goto-char block-follows)
|
||
(zerop (c-forward-token-2 1 t)))
|
||
(eq (char-after) ?\())))
|
||
(cons 'inexpr-class (point))))
|
||
((and c-opt-inexpr-block-key
|
||
(looking-at c-opt-inexpr-block-key))
|
||
(cons 'inexpr-statement (point)))
|
||
((and c-opt-lambda-key
|
||
(looking-at c-opt-lambda-key))
|
||
(cons 'inlambda (point)))
|
||
((and c-opt-block-stmt-key
|
||
(looking-at c-opt-block-stmt-key))
|
||
nil)
|
||
(t
|
||
(if (eq (char-after) ?\[)
|
||
(setq passed-bracket t))
|
||
'maybe))))
|
||
(if (eq res 'maybe)
|
||
(when (and block-follows
|
||
containing-sexp
|
||
(eq (char-after containing-sexp) ?\())
|
||
(goto-char containing-sexp)
|
||
(if (or (save-excursion
|
||
(c-backward-syntactic-ws lim)
|
||
(and (> (point) (or lim (point-min)))
|
||
(c-on-identifier)))
|
||
(and c-special-brace-lists
|
||
(c-looking-at-special-brace-list)))
|
||
nil
|
||
(cons 'inexpr-statement (point))))
|
||
res))))
|
||
|
||
(defun c-looking-at-inexpr-block-backward (paren-state)
|
||
;; Returns non-nil if we're looking at the end of an in-expression
|
||
;; block, otherwise the same as `c-looking-at-inexpr-block'.
|
||
;; PAREN-STATE is the paren state relevant at the current position.
|
||
(save-excursion
|
||
;; We currently only recognize a block.
|
||
(let ((here (point))
|
||
(elem (car-safe paren-state))
|
||
containing-sexp)
|
||
(when (and (consp elem)
|
||
(progn (goto-char (cdr elem))
|
||
(c-forward-syntactic-ws here)
|
||
(= (point) here)))
|
||
(goto-char (car elem))
|
||
(if (setq paren-state (cdr paren-state))
|
||
(setq containing-sexp (car-safe paren-state)))
|
||
(c-looking-at-inexpr-block (c-safe-position containing-sexp
|
||
paren-state)
|
||
containing-sexp)))))
|
||
|
||
(defun c-narrow-out-enclosing-class (paren-state lim)
|
||
;; Narrow the buffer so that the enclosing class is hidden. Uses
|
||
;; and returns the value from c-search-uplist-for-classkey.
|
||
(setq paren-state (c-whack-state-after (point) paren-state))
|
||
(let (inclass-p)
|
||
(and paren-state
|
||
(setq inclass-p (c-search-uplist-for-classkey paren-state))
|
||
(narrow-to-region
|
||
(progn
|
||
(goto-char (1+ (aref inclass-p 1)))
|
||
(c-skip-ws-forward lim)
|
||
;; if point is now left of the class opening brace, we're
|
||
;; hosed, so try a different tact
|
||
(if (<= (point) (aref inclass-p 1))
|
||
(progn
|
||
(goto-char (1+ (aref inclass-p 1)))
|
||
(c-forward-syntactic-ws lim)))
|
||
(point))
|
||
;; end point is the end of the current line
|
||
(progn
|
||
(goto-char lim)
|
||
(c-point 'eol))))
|
||
;; return the class vector
|
||
inclass-p))
|
||
|
||
|
||
;; `c-guess-basic-syntax' and the functions that precedes it below
|
||
;; implements the main decision tree for determining the syntactic
|
||
;; analysis of the current line of code.
|
||
|
||
;; Dynamically bound to t when `c-guess-basic-syntax' is called during
|
||
;; auto newline analysis.
|
||
(defvar c-auto-newline-analysis nil)
|
||
|
||
(defsubst c-add-syntax (symbol &rest args)
|
||
;; A simple function to prepend a new syntax element to
|
||
;; `c-syntactic-context'. Using `setq' on it is unsafe since it
|
||
;; should always be dynamically bound but since we read it first
|
||
;; we'll fail properly anyway if this function is misused.
|
||
(setq c-syntactic-context (cons (cons symbol args)
|
||
c-syntactic-context)))
|
||
|
||
(defsubst c-append-syntax (symbol &rest args)
|
||
;; Like `c-add-syntax' but appends to the end of the syntax list.
|
||
;; (Normally not necessary.)
|
||
(setq c-syntactic-context (nconc c-syntactic-context
|
||
(list (cons symbol args)))))
|
||
|
||
(defun c-add-stmt-syntax (syntax-symbol
|
||
syntax-extra-args
|
||
stop-at-boi-only
|
||
at-block-start
|
||
containing-sexp
|
||
paren-state)
|
||
;; Do the generic processing to anchor the given syntax symbol on
|
||
;; the preceding statement: Skip over any labels and containing
|
||
;; statements on the same line, and then search backward until we
|
||
;; find a statement or block start that begins at boi without a
|
||
;; label or comment.
|
||
;;
|
||
;; Point is assumed to be at the prospective anchor point for the
|
||
;; given SYNTAX-SYMBOL. More syntax entries are added if we need to
|
||
;; skip past open parens and containing statements. All the added
|
||
;; syntax elements will get the same anchor point.
|
||
;;
|
||
;; SYNTAX-EXTRA-ARGS are a list of the extra arguments for the
|
||
;; syntax symbol. They are appended after the anchor point.
|
||
;;
|
||
;; If STOP-AT-BOI-ONLY is nil, we might stop in the middle of the
|
||
;; line if another statement precedes the current one on this line.
|
||
;;
|
||
;; If AT-BLOCK-START is non-nil, point is taken to be at the
|
||
;; beginning of a block or brace list, which then might be nested
|
||
;; inside an expression. If AT-BLOCK-START is nil, this is found
|
||
;; out by checking whether the character at point is "{" or not.
|
||
(if (= (point) (c-point 'boi))
|
||
;; This is by far the most common case, so let's give it special
|
||
;; treatment.
|
||
(apply 'c-add-syntax syntax-symbol (point) syntax-extra-args)
|
||
|
||
(let ((savepos (point))
|
||
(syntax-last c-syntactic-context)
|
||
(boi (c-point 'boi))
|
||
(prev-paren (if at-block-start ?{ (char-after)))
|
||
step-type step-tmp at-comment special-list)
|
||
(apply 'c-add-syntax syntax-symbol nil syntax-extra-args)
|
||
|
||
;; Begin by skipping any labels and containing statements that
|
||
;; are on the same line.
|
||
(while (and (/= (point) boi)
|
||
(if (memq (setq step-tmp
|
||
(c-beginning-of-statement-1 boi nil t))
|
||
'(up label))
|
||
t
|
||
(goto-char savepos)
|
||
nil)
|
||
(/= (point) savepos))
|
||
(setq savepos (point)
|
||
step-type step-tmp))
|
||
|
||
(catch 'done
|
||
;; Loop if we have to back out of the containing block.
|
||
(while
|
||
(progn
|
||
|
||
;; Loop if we have to back up another statement.
|
||
(while
|
||
(progn
|
||
|
||
;; Always start by skipping over any comments that
|
||
;; stands between the statement and boi.
|
||
(while (and (/= (setq savepos (point)) boi)
|
||
(c-backward-single-comment))
|
||
(setq at-comment t
|
||
boi (c-point 'boi)))
|
||
(goto-char savepos)
|
||
|
||
(and
|
||
(or at-comment
|
||
(eq step-type 'label)
|
||
(/= savepos boi))
|
||
|
||
(let ((save-step-type step-type))
|
||
;; Current position might not be good enough;
|
||
;; skip backward another statement.
|
||
(setq step-type (c-beginning-of-statement-1
|
||
containing-sexp))
|
||
|
||
(if (and (not stop-at-boi-only)
|
||
(/= savepos boi)
|
||
(memq step-type '(up previous)))
|
||
;; If stop-at-boi-only is nil, we shouldn't
|
||
;; back up over previous or containing
|
||
;; statements to try to reach boi, so go
|
||
;; back to the last position and exit.
|
||
(progn
|
||
(goto-char savepos)
|
||
nil)
|
||
(if (and (not stop-at-boi-only)
|
||
(memq step-type '(up previous beginning)))
|
||
;; If we've moved into another statement
|
||
;; then we should no longer try to stop
|
||
;; after boi.
|
||
(setq stop-at-boi-only t))
|
||
|
||
;; Record this a substatement if we skipped up
|
||
;; one level, but not if we're still on the
|
||
;; same line. This so e.g. a sequence of "else
|
||
;; if" clauses won't indent deeper and deeper.
|
||
(when (and (eq step-type 'up)
|
||
(< (point) boi))
|
||
(c-add-syntax 'substatement nil))
|
||
|
||
(setq boi (c-point 'boi))
|
||
(if (= (point) savepos)
|
||
(progn
|
||
(setq step-type save-step-type)
|
||
nil)
|
||
t)))))
|
||
|
||
(setq savepos (point)
|
||
at-comment nil))
|
||
(setq at-comment nil)
|
||
|
||
(when (and containing-sexp
|
||
(if (memq step-type '(nil same))
|
||
(/= (point) boi)
|
||
(eq step-type 'label)))
|
||
(goto-char containing-sexp)
|
||
|
||
;; Don't stop in the middle of a special brace list opener
|
||
;; like "({".
|
||
(when (and c-special-brace-lists
|
||
(setq special-list
|
||
(c-looking-at-special-brace-list)))
|
||
(setq containing-sexp (car (car special-list)))
|
||
(goto-char containing-sexp))
|
||
|
||
(setq paren-state (c-whack-state-after containing-sexp
|
||
paren-state)
|
||
containing-sexp (c-most-enclosing-brace paren-state)
|
||
savepos (point)
|
||
boi (c-point 'boi))
|
||
|
||
(if (eq (setq prev-paren (char-after)) ?\()
|
||
(progn
|
||
(c-backward-syntactic-ws containing-sexp)
|
||
(when (/= savepos boi)
|
||
(if (and (or (not (looking-at "\\>"))
|
||
(not (c-on-identifier)))
|
||
(not special-list)
|
||
(save-excursion
|
||
(c-forward-syntactic-ws)
|
||
(forward-char)
|
||
(c-forward-syntactic-ws)
|
||
(eq (char-after) ?{)))
|
||
;; We're in an in-expression statement.
|
||
;; This syntactic element won't get an anchor pos.
|
||
(c-add-syntax 'inexpr-statement)
|
||
(c-add-syntax 'arglist-cont-nonempty nil savepos)))
|
||
(goto-char (max boi
|
||
(if containing-sexp
|
||
(1+ containing-sexp)
|
||
(point-min))))
|
||
(setq step-type 'same))
|
||
(setq step-type
|
||
(c-beginning-of-statement-1 containing-sexp)))
|
||
|
||
(let ((at-bod (and (eq step-type 'same)
|
||
(/= savepos (point))
|
||
(eq prev-paren ?{))))
|
||
|
||
(when (= savepos boi)
|
||
;; If the open brace was at boi, we're always
|
||
;; done. The c-beginning-of-statement-1 call
|
||
;; above is necessary anyway, to decide the type
|
||
;; of block-intro to add.
|
||
(goto-char savepos)
|
||
(setq savepos nil))
|
||
|
||
(when (eq prev-paren ?{)
|
||
(c-add-syntax (if at-bod
|
||
'defun-block-intro
|
||
'statement-block-intro)
|
||
nil))
|
||
|
||
(when (and (not at-bod) savepos)
|
||
;; Loop if the brace wasn't at boi, and we didn't
|
||
;; arrive at a defun block.
|
||
(if (eq step-type 'same)
|
||
;; Avoid backing up another sexp if the point
|
||
;; we're at now is found to be good enough in
|
||
;; the loop above.
|
||
(setq step-type nil))
|
||
(if (and (not stop-at-boi-only)
|
||
(memq step-type '(up previous beginning)))
|
||
(setq stop-at-boi-only t))
|
||
(setq boi (c-point 'boi)))))
|
||
)))
|
||
|
||
;; Fill in the current point as the anchor for all the symbols
|
||
;; added above.
|
||
(let ((p c-syntactic-context))
|
||
(while (not (eq p syntax-last))
|
||
(if (cdr (car p))
|
||
(setcar (cdr (car p)) (point)))
|
||
(setq p (cdr p))))
|
||
|
||
)))
|
||
|
||
(defun c-add-class-syntax (symbol classkey paren-state)
|
||
;; The inclass and class-close syntactic symbols are added in
|
||
;; several places and some work is needed to fix everything.
|
||
;; Therefore it's collected here.
|
||
(save-restriction
|
||
(widen)
|
||
(let (inexpr anchor containing-sexp)
|
||
(goto-char (aref classkey 1))
|
||
(if (and (eq symbol 'inclass) (= (point) (c-point 'boi)))
|
||
(c-add-syntax symbol (setq anchor (point)))
|
||
(c-add-syntax symbol (setq anchor (aref classkey 0)))
|
||
(if (and c-opt-inexpr-class-key
|
||
(setq containing-sexp (c-most-enclosing-brace paren-state
|
||
(point))
|
||
inexpr (cdr (c-looking-at-inexpr-block
|
||
(c-safe-position containing-sexp
|
||
paren-state)
|
||
containing-sexp)))
|
||
(/= inexpr (c-point 'boi inexpr)))
|
||
(c-add-syntax 'inexpr-class)))
|
||
anchor)))
|
||
|
||
(defun c-guess-continued-construct (indent-point
|
||
char-after-ip
|
||
beg-of-same-or-containing-stmt
|
||
containing-sexp
|
||
paren-state)
|
||
;; This function contains the decision tree reached through both
|
||
;; cases 18 and 10. It's a continued statement or top level
|
||
;; construct of some kind.
|
||
|
||
(let (special-brace-list)
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
|
||
(cond
|
||
;; (CASE A removed.)
|
||
;; CASE B: open braces for class or brace-lists
|
||
((setq special-brace-list
|
||
(or (and c-special-brace-lists
|
||
(c-looking-at-special-brace-list))
|
||
(eq char-after-ip ?{)))
|
||
|
||
(cond
|
||
;; CASE B.1: class-open
|
||
((save-excursion
|
||
(skip-chars-forward "{")
|
||
(let ((decl (c-search-uplist-for-classkey (c-parse-state))))
|
||
(and decl
|
||
(setq beg-of-same-or-containing-stmt (aref decl 0)))
|
||
))
|
||
(c-add-syntax 'class-open beg-of-same-or-containing-stmt))
|
||
|
||
;; CASE B.2: brace-list-open
|
||
((or (consp special-brace-list)
|
||
(save-excursion
|
||
(goto-char beg-of-same-or-containing-stmt)
|
||
(c-syntactic-re-search-forward "=\\([^=]\\|$\\)"
|
||
indent-point t t t)))
|
||
;; The most semantically accurate symbol here is
|
||
;; brace-list-open, but we normally report it simply as a
|
||
;; statement-cont. The reason is that one normally adjusts
|
||
;; brace-list-open for brace lists as top-level constructs,
|
||
;; and brace lists inside statements is a completely different
|
||
;; context. C.f. case 5A.3.
|
||
(c-beginning-of-statement-1 containing-sexp)
|
||
(c-add-stmt-syntax (if c-auto-newline-analysis
|
||
;; Turn off the dwim above when we're
|
||
;; analyzing the nature of the brace
|
||
;; for the auto newline feature.
|
||
'brace-list-open
|
||
'statement-cont)
|
||
nil nil nil
|
||
containing-sexp paren-state))
|
||
|
||
;; CASE B.3: The body of a function declared inside a normal
|
||
;; block. Can occur e.g. in Pike and when using gcc
|
||
;; extensions, but watch out for macros followed by blocks.
|
||
;; C.f. cases E, 16F and 17G.
|
||
((and (not (c-looking-at-bos))
|
||
(eq (c-beginning-of-statement-1 containing-sexp nil nil t)
|
||
'same)
|
||
(save-excursion
|
||
;; Look for a type followed by a symbol, i.e. the start of a
|
||
;; function declaration. Doesn't work for declarations like
|
||
;; "int *foo() ..."; we'd need to refactor the more competent
|
||
;; analysis in `c-font-lock-declarations' for that.
|
||
(and (c-forward-type)
|
||
(progn
|
||
(c-forward-syntactic-ws)
|
||
(looking-at c-symbol-start)))))
|
||
(c-add-stmt-syntax 'defun-open nil t nil
|
||
containing-sexp paren-state))
|
||
|
||
;; CASE B.4: Continued statement with block open. The most
|
||
;; accurate analysis is perhaps `statement-cont' together with
|
||
;; `block-open' but we play DWIM and use `substatement-open'
|
||
;; instead. The rationaly is that this typically is a macro
|
||
;; followed by a block which makes it very similar to a
|
||
;; statement with a substatement block.
|
||
(t
|
||
(c-add-stmt-syntax 'substatement-open nil nil nil
|
||
containing-sexp paren-state))
|
||
))
|
||
|
||
;; CASE C: iostream insertion or extraction operator
|
||
((and (looking-at "\\(<<\\|>>\\)\\([^=]\\|$\\)")
|
||
(save-excursion
|
||
(goto-char beg-of-same-or-containing-stmt)
|
||
;; If there is no preceding streamop in the statement
|
||
;; then indent this line as a normal statement-cont.
|
||
(when (c-syntactic-re-search-forward
|
||
"\\(<<\\|>>\\)\\([^=]\\|$\\)" indent-point 'move t t)
|
||
(c-add-syntax 'stream-op (c-point 'boi))
|
||
t))))
|
||
|
||
;; CASE E: In the "K&R region" of a function declared inside a
|
||
;; normal block. C.f. case B.3.
|
||
((and (save-excursion
|
||
;; Check that the next token is a '{'. This works as
|
||
;; long as no language that allows nested function
|
||
;; definitions allows stuff like member init lists, K&R
|
||
;; declarations or throws clauses there.
|
||
;;
|
||
;; Note that we do a forward search for something ahead
|
||
;; of the indentation line here. That's not good since
|
||
;; the user might not have typed it yet. Unfortunately
|
||
;; it's exceedingly tricky to recognize a function
|
||
;; prototype in a code block without resorting to this.
|
||
(c-forward-syntactic-ws)
|
||
(eq (char-after) ?{))
|
||
(not (c-looking-at-bos))
|
||
(eq (c-beginning-of-statement-1 containing-sexp nil nil t)
|
||
'same)
|
||
(save-excursion
|
||
;; Look for a type followed by a symbol, i.e. the start of a
|
||
;; function declaration. Doesn't work for declarations like "int
|
||
;; *foo() ..."; we'd need to refactor the more competent analysis
|
||
;; in `c-font-lock-declarations' for that.
|
||
(and (c-forward-type)
|
||
(progn
|
||
(c-forward-syntactic-ws)
|
||
(looking-at c-symbol-start)))))
|
||
(c-add-stmt-syntax 'func-decl-cont nil t nil
|
||
containing-sexp paren-state))
|
||
|
||
;; CASE D: continued statement.
|
||
(t
|
||
(c-beginning-of-statement-1 containing-sexp)
|
||
(c-add-stmt-syntax 'statement-cont nil nil nil
|
||
containing-sexp paren-state))
|
||
)))
|
||
|
||
(defun c-guess-basic-syntax ()
|
||
"Return the syntactic context of the current line.
|
||
This function does not do any hidden buffer changes."
|
||
(save-excursion
|
||
(save-restriction
|
||
(beginning-of-line)
|
||
(c-save-buffer-state
|
||
((indent-point (point))
|
||
(case-fold-search nil)
|
||
(paren-state (c-parse-state))
|
||
literal containing-sexp char-before-ip char-after-ip lim
|
||
c-syntactic-context placeholder c-in-literal-cache step-type
|
||
tmpsymbol keyword injava-inher special-brace-list
|
||
;; narrow out any enclosing class or extern "C" block
|
||
(inclass-p (c-narrow-out-enclosing-class paren-state
|
||
indent-point))
|
||
;; `c-state-cache' is shadowed here so that we don't
|
||
;; throw it away due to the narrowing that might be done
|
||
;; by the function above. That means we must not do any
|
||
;; changes during the execution of this function, since
|
||
;; `c-invalidate-state-cache' then would change this local
|
||
;; variable and leave a bogus value in the global one.
|
||
(c-state-cache (if inclass-p
|
||
(c-whack-state-before (point-min) paren-state)
|
||
paren-state))
|
||
(c-state-cache-start (point-min))
|
||
inenclosing-p macro-start in-macro-expr
|
||
;; There's always at most one syntactic element which got
|
||
;; a relpos. It's stored in syntactic-relpos.
|
||
syntactic-relpos
|
||
(c-stmt-delim-chars c-stmt-delim-chars))
|
||
;; Check for meta top-level enclosing constructs such as
|
||
;; extern language definitions.
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(when (and inclass-p
|
||
(progn
|
||
(goto-char (aref inclass-p 0))
|
||
(looking-at c-other-decl-block-key)))
|
||
(setq inenclosing-p (match-string 1))
|
||
(if (string-equal inenclosing-p "extern")
|
||
;; Compatibility with legacy choice of name for the
|
||
;; extern-lang syntactic symbols.
|
||
(setq inenclosing-p "extern-lang")))))
|
||
|
||
;; Init some position variables:
|
||
;;
|
||
;; containing-sexp is the open paren of the closest
|
||
;; surrounding sexp or nil if there is none that hasn't been
|
||
;; narrowed out.
|
||
;;
|
||
;; lim is the position after the closest preceding brace sexp
|
||
;; (nested sexps are ignored), or the position after
|
||
;; containing-sexp if there is none, or (point-min) if
|
||
;; containing-sexp is nil.
|
||
;;
|
||
;; c-state-cache is the state from c-parse-state at
|
||
;; indent-point, without any parens outside the region
|
||
;; narrowed by c-narrow-out-enclosing-class.
|
||
;;
|
||
;; paren-state is the state from c-parse-state outside
|
||
;; containing-sexp, or at indent-point if containing-sexp is
|
||
;; nil. paren-state is not limited to the narrowed region, as
|
||
;; opposed to c-state-cache.
|
||
(if c-state-cache
|
||
(progn
|
||
(setq containing-sexp (car paren-state)
|
||
paren-state (cdr paren-state))
|
||
(if (consp containing-sexp)
|
||
(progn
|
||
(setq lim (cdr containing-sexp))
|
||
(if (cdr c-state-cache)
|
||
;; Ignore balanced paren. The next entry
|
||
;; can't be another one.
|
||
(setq containing-sexp (car (cdr c-state-cache))
|
||
paren-state (cdr paren-state))
|
||
;; If there is no surrounding open paren then
|
||
;; put the last balanced pair back on paren-state.
|
||
(setq paren-state (cons containing-sexp paren-state)
|
||
containing-sexp nil)))
|
||
(setq lim (1+ containing-sexp))))
|
||
(setq lim (point-min)))
|
||
|
||
;; If we're in a parenthesis list then ',' delimits the
|
||
;; "statements" rather than being an operator (with the
|
||
;; exception of the "for" clause). This difference is
|
||
;; typically only noticeable when statements are used in macro
|
||
;; arglists.
|
||
(when (and containing-sexp
|
||
(eq (char-after containing-sexp) ?\())
|
||
(setq c-stmt-delim-chars c-stmt-delim-chars-with-comma))
|
||
|
||
;; cache char before and after indent point, and move point to
|
||
;; the most likely position to perform the majority of tests
|
||
(goto-char indent-point)
|
||
(c-backward-syntactic-ws lim)
|
||
(setq char-before-ip (char-before))
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
(setq char-after-ip (char-after))
|
||
|
||
;; are we in a literal?
|
||
(setq literal (c-in-literal lim))
|
||
|
||
;; now figure out syntactic qualities of the current line
|
||
(cond
|
||
;; CASE 1: in a string.
|
||
((eq literal 'string)
|
||
(c-add-syntax 'string (c-point 'bopl)))
|
||
;; CASE 2: in a C or C++ style comment.
|
||
((and (memq literal '(c c++))
|
||
;; This is a kludge for XEmacs where we use
|
||
;; `buffer-syntactic-context', which doesn't correctly
|
||
;; recognize "\*/" to end a block comment.
|
||
;; `parse-partial-sexp' which is used by
|
||
;; `c-literal-limits' will however do that in most
|
||
;; versions, which results in that we get nil from
|
||
;; `c-literal-limits' even when `c-in-literal' claims
|
||
;; we're inside a comment.
|
||
(setq placeholder (c-literal-limits lim)))
|
||
(c-add-syntax literal (car placeholder)))
|
||
;; CASE 3: in a cpp preprocessor macro continuation.
|
||
((and (save-excursion
|
||
(when (c-beginning-of-macro)
|
||
(setq macro-start (point))))
|
||
(/= macro-start (c-point 'boi))
|
||
(progn
|
||
(setq tmpsymbol 'cpp-macro-cont)
|
||
(or (not c-syntactic-indentation-in-macros)
|
||
(save-excursion
|
||
(goto-char macro-start)
|
||
;; If at the beginning of the body of a #define
|
||
;; directive then analyze as cpp-define-intro
|
||
;; only. Go on with the syntactic analysis
|
||
;; otherwise. in-macro-expr is set if we're in a
|
||
;; cpp expression, i.e. before the #define body
|
||
;; or anywhere in a non-#define directive.
|
||
(if (c-forward-to-cpp-define-body)
|
||
(let ((indent-boi (c-point 'boi indent-point)))
|
||
(setq in-macro-expr (> (point) indent-boi)
|
||
tmpsymbol 'cpp-define-intro)
|
||
(= (point) indent-boi))
|
||
(setq in-macro-expr t)
|
||
nil)))))
|
||
(c-add-syntax tmpsymbol macro-start)
|
||
(setq macro-start nil))
|
||
;; CASE 11: an else clause?
|
||
((looking-at "else\\>[^_]")
|
||
(c-beginning-of-statement-1 containing-sexp)
|
||
(c-add-stmt-syntax 'else-clause nil t nil
|
||
containing-sexp paren-state))
|
||
;; CASE 12: while closure of a do/while construct?
|
||
((and (looking-at "while\\>[^_]")
|
||
(save-excursion
|
||
(prog1 (eq (c-beginning-of-statement-1 containing-sexp)
|
||
'beginning)
|
||
(setq placeholder (point)))))
|
||
(goto-char placeholder)
|
||
(c-add-stmt-syntax 'do-while-closure nil t nil
|
||
containing-sexp paren-state))
|
||
;; CASE 13: A catch or finally clause? This case is simpler
|
||
;; than if-else and do-while, because a block is required
|
||
;; after every try, catch and finally.
|
||
((save-excursion
|
||
(and (cond ((c-major-mode-is 'c++-mode)
|
||
(looking-at "catch\\>[^_]"))
|
||
((c-major-mode-is 'java-mode)
|
||
(looking-at "\\(catch\\|finally\\)\\>[^_]")))
|
||
(and (c-safe (c-backward-syntactic-ws)
|
||
(c-backward-sexp)
|
||
t)
|
||
(eq (char-after) ?{)
|
||
(c-safe (c-backward-syntactic-ws)
|
||
(c-backward-sexp)
|
||
t)
|
||
(if (eq (char-after) ?\()
|
||
(c-safe (c-backward-sexp) t)
|
||
t))
|
||
(looking-at "\\(try\\|catch\\)\\>[^_]")
|
||
(setq placeholder (point))))
|
||
(goto-char placeholder)
|
||
(c-add-stmt-syntax 'catch-clause nil t nil
|
||
containing-sexp paren-state))
|
||
;; CASE 18: A substatement we can recognize by keyword.
|
||
((save-excursion
|
||
(and c-opt-block-stmt-key
|
||
(if (c-mode-is-new-awk-p)
|
||
(c-awk-prev-line-incomplete-p containing-sexp) ; ACM 2002/3/29
|
||
(not (eq char-before-ip ?\;)))
|
||
(not (memq char-after-ip '(?\) ?\] ?,)))
|
||
(or (not (eq char-before-ip ?}))
|
||
(c-looking-at-inexpr-block-backward c-state-cache))
|
||
(> (point)
|
||
(progn
|
||
;; Ought to cache the result from the
|
||
;; c-beginning-of-statement-1 calls here.
|
||
(setq placeholder (point))
|
||
(while (eq (setq step-type
|
||
(c-beginning-of-statement-1 lim))
|
||
'label))
|
||
(if (eq step-type 'previous)
|
||
(goto-char placeholder)
|
||
(setq placeholder (point))
|
||
(if (and (eq step-type 'same)
|
||
(not (looking-at c-opt-block-stmt-key)))
|
||
;; Step up to the containing statement if we
|
||
;; stayed in the same one.
|
||
(let (step)
|
||
(while (eq
|
||
(setq step
|
||
(c-beginning-of-statement-1 lim))
|
||
'label))
|
||
(if (eq step 'up)
|
||
(setq placeholder (point))
|
||
;; There was no containing statement afterall.
|
||
(goto-char placeholder)))))
|
||
placeholder))
|
||
(if (looking-at c-block-stmt-2-key)
|
||
;; Require a parenthesis after these keywords.
|
||
;; Necessary to catch e.g. synchronized in Java,
|
||
;; which can be used both as statement and
|
||
;; modifier.
|
||
(and (zerop (c-forward-token-2 1 nil))
|
||
(eq (char-after) ?\())
|
||
(looking-at c-opt-block-stmt-key))))
|
||
(if (eq step-type 'up)
|
||
;; CASE 18A: Simple substatement.
|
||
(progn
|
||
(goto-char placeholder)
|
||
(cond
|
||
((eq char-after-ip ?{)
|
||
(c-add-stmt-syntax 'substatement-open nil nil nil
|
||
containing-sexp paren-state))
|
||
((save-excursion
|
||
(goto-char indent-point)
|
||
(back-to-indentation)
|
||
(looking-at c-label-key))
|
||
(c-add-stmt-syntax 'substatement-label nil nil nil
|
||
containing-sexp paren-state))
|
||
(t
|
||
(c-add-stmt-syntax 'substatement nil nil nil
|
||
containing-sexp paren-state))))
|
||
;; CASE 18B: Some other substatement. This is shared
|
||
;; with case 10.
|
||
(c-guess-continued-construct indent-point
|
||
char-after-ip
|
||
placeholder
|
||
lim
|
||
paren-state)))
|
||
;; CASE 4: In-expression statement. C.f. cases 7B, 16A and
|
||
;; 17E.
|
||
((and (or c-opt-inexpr-class-key
|
||
c-opt-inexpr-block-key
|
||
c-opt-lambda-key)
|
||
(setq placeholder (c-looking-at-inexpr-block
|
||
(c-safe-position containing-sexp paren-state)
|
||
containing-sexp)))
|
||
(setq tmpsymbol (assq (car placeholder)
|
||
'((inexpr-class . class-open)
|
||
(inexpr-statement . block-open))))
|
||
(if tmpsymbol
|
||
;; It's a statement block or an anonymous class.
|
||
(setq tmpsymbol (cdr tmpsymbol))
|
||
;; It's a Pike lambda. Check whether we are between the
|
||
;; lambda keyword and the argument list or at the defun
|
||
;; opener.
|
||
(setq tmpsymbol (if (eq char-after-ip ?{)
|
||
'inline-open
|
||
'lambda-intro-cont)))
|
||
(goto-char (cdr placeholder))
|
||
(back-to-indentation)
|
||
(c-add-stmt-syntax tmpsymbol nil t nil
|
||
(c-most-enclosing-brace c-state-cache (point))
|
||
(c-whack-state-after (point) paren-state))
|
||
(unless (eq (point) (cdr placeholder))
|
||
(c-add-syntax (car placeholder))))
|
||
;; CASE 5: Line is at top level.
|
||
((null containing-sexp)
|
||
(cond
|
||
;; CASE 5A: we are looking at a defun, brace list, class,
|
||
;; or inline-inclass method opening brace
|
||
((setq special-brace-list
|
||
(or (and c-special-brace-lists
|
||
(c-looking-at-special-brace-list))
|
||
(eq char-after-ip ?{)))
|
||
(cond
|
||
;; CASE 5A.1: Non-class declaration block open.
|
||
((save-excursion
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
(and (c-safe (c-backward-sexp 2) t)
|
||
(looking-at c-other-decl-block-key)
|
||
(setq keyword (match-string 1)
|
||
placeholder (point))
|
||
(if (string-equal keyword "extern")
|
||
;; Special case for extern-lang-open. The
|
||
;; check for a following string is disabled
|
||
;; since it doesn't disambiguate anything.
|
||
(and ;;(progn
|
||
;; (c-forward-sexp 1)
|
||
;; (c-forward-syntactic-ws)
|
||
;; (eq (char-after) ?\"))
|
||
(setq tmpsymbol 'extern-lang-open))
|
||
(setq tmpsymbol (intern (concat keyword "-open"))))
|
||
))
|
||
(goto-char placeholder)
|
||
(c-add-syntax tmpsymbol (c-point 'boi)))
|
||
;; CASE 5A.2: we are looking at a class opening brace
|
||
((save-excursion
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t{")
|
||
(let ((decl (c-search-uplist-for-classkey (c-parse-state))))
|
||
(and decl
|
||
(setq placeholder (aref decl 0)))
|
||
))
|
||
(c-add-syntax 'class-open placeholder))
|
||
;; CASE 5A.3: brace list open
|
||
((save-excursion
|
||
(c-beginning-of-decl-1 lim)
|
||
(while (looking-at c-specifier-key)
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws indent-point))
|
||
(setq placeholder (c-point 'boi))
|
||
(or (consp special-brace-list)
|
||
(and (or (save-excursion
|
||
(goto-char indent-point)
|
||
(setq tmpsymbol nil)
|
||
(while (and (> (point) placeholder)
|
||
(zerop (c-backward-token-2 1 t))
|
||
(/= (char-after) ?=))
|
||
(and c-opt-inexpr-brace-list-key
|
||
(not tmpsymbol)
|
||
(looking-at c-opt-inexpr-brace-list-key)
|
||
(setq tmpsymbol 'topmost-intro-cont)))
|
||
(eq (char-after) ?=))
|
||
(looking-at c-brace-list-key))
|
||
(save-excursion
|
||
(while (and (< (point) indent-point)
|
||
(zerop (c-forward-token-2 1 t))
|
||
(not (memq (char-after) '(?\; ?\()))))
|
||
(not (memq (char-after) '(?\; ?\()))
|
||
))))
|
||
(if (and (not c-auto-newline-analysis)
|
||
(c-major-mode-is 'java-mode)
|
||
(eq tmpsymbol 'topmost-intro-cont))
|
||
;; We're in Java and have found that the open brace
|
||
;; belongs to a "new Foo[]" initialization list,
|
||
;; which means the brace list is part of an
|
||
;; expression and not a top level definition. We
|
||
;; therefore treat it as any topmost continuation
|
||
;; even though the semantically correct symbol still
|
||
;; is brace-list-open, on the same grounds as in
|
||
;; case B.2.
|
||
(progn
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-syntax 'topmost-intro-cont (c-point 'boi)))
|
||
(c-add-syntax 'brace-list-open placeholder)))
|
||
;; CASE 5A.4: inline defun open
|
||
((and inclass-p (not inenclosing-p))
|
||
(c-add-syntax 'inline-open)
|
||
(c-add-class-syntax 'inclass inclass-p paren-state))
|
||
;; CASE 5A.5: ordinary defun open
|
||
(t
|
||
(goto-char placeholder)
|
||
(if (or inclass-p macro-start)
|
||
(c-add-syntax 'defun-open (c-point 'boi))
|
||
;; Bogus to use bol here, but it's the legacy.
|
||
(c-add-syntax 'defun-open (c-point 'bol)))
|
||
)))
|
||
;; CASE 5B: first K&R arg decl or member init
|
||
((c-just-after-func-arglist-p lim)
|
||
(cond
|
||
;; CASE 5B.1: a member init
|
||
((or (eq char-before-ip ?:)
|
||
(eq char-after-ip ?:))
|
||
;; this line should be indented relative to the beginning
|
||
;; of indentation for the topmost-intro line that contains
|
||
;; the prototype's open paren
|
||
;; TBD: is the following redundant?
|
||
(if (eq char-before-ip ?:)
|
||
(forward-char -1))
|
||
(c-backward-syntactic-ws lim)
|
||
;; TBD: is the preceding redundant?
|
||
(if (eq (char-before) ?:)
|
||
(progn (forward-char -1)
|
||
(c-backward-syntactic-ws lim)))
|
||
(if (eq (char-before) ?\))
|
||
(c-backward-sexp 1))
|
||
(setq placeholder (point))
|
||
(save-excursion
|
||
(and (c-safe (c-backward-sexp 1) t)
|
||
(looking-at "throw[^_]")
|
||
(c-safe (c-backward-sexp 1) t)
|
||
(setq placeholder (point))))
|
||
(goto-char placeholder)
|
||
(c-add-syntax 'member-init-intro (c-point 'boi))
|
||
;; we don't need to add any class offset since this
|
||
;; should be relative to the ctor's indentation
|
||
)
|
||
;; CASE 5B.2: K&R arg decl intro
|
||
((and c-recognize-knr-p
|
||
(c-in-knr-argdecl lim))
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-syntax 'knr-argdecl-intro (c-point 'boi))
|
||
(if inclass-p
|
||
(c-add-class-syntax 'inclass inclass-p paren-state)))
|
||
;; CASE 5B.3: Inside a member init list.
|
||
((c-beginning-of-member-init-list lim)
|
||
(c-forward-syntactic-ws)
|
||
(c-add-syntax 'member-init-cont (point)))
|
||
;; CASE 5B.4: Nether region after a C++ or Java func
|
||
;; decl, which could include a `throws' declaration.
|
||
(t
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-syntax 'func-decl-cont (c-point 'boi))
|
||
)))
|
||
;; CASE 5C: inheritance line. could be first inheritance
|
||
;; line, or continuation of a multiple inheritance
|
||
((or (and (c-major-mode-is 'c++-mode)
|
||
(progn
|
||
(when (eq char-after-ip ?,)
|
||
(skip-chars-forward " \t")
|
||
(forward-char))
|
||
(looking-at c-opt-postfix-decl-spec-key)))
|
||
(and (or (eq char-before-ip ?:)
|
||
;; watch out for scope operator
|
||
(save-excursion
|
||
(and (eq char-after-ip ?:)
|
||
(c-safe (forward-char 1) t)
|
||
(not (eq (char-after) ?:))
|
||
)))
|
||
(save-excursion
|
||
(c-backward-syntactic-ws lim)
|
||
(if (eq char-before-ip ?:)
|
||
(progn
|
||
(forward-char -1)
|
||
(c-backward-syntactic-ws lim)))
|
||
(back-to-indentation)
|
||
(looking-at c-class-key)))
|
||
;; for Java
|
||
(and (c-major-mode-is 'java-mode)
|
||
(let ((fence (save-excursion
|
||
(c-beginning-of-statement-1 lim)
|
||
(point)))
|
||
cont done)
|
||
(save-excursion
|
||
(while (not done)
|
||
(cond ((looking-at c-opt-postfix-decl-spec-key)
|
||
(setq injava-inher (cons cont (point))
|
||
done t))
|
||
((or (not (c-safe (c-forward-sexp -1) t))
|
||
(<= (point) fence))
|
||
(setq done t))
|
||
)
|
||
(setq cont t)))
|
||
injava-inher)
|
||
(not (c-crosses-statement-barrier-p (cdr injava-inher)
|
||
(point)))
|
||
))
|
||
(cond
|
||
;; CASE 5C.1: non-hanging colon on an inher intro
|
||
((eq char-after-ip ?:)
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-syntax 'inher-intro (c-point 'boi))
|
||
;; don't add inclass symbol since relative point already
|
||
;; contains any class offset
|
||
)
|
||
;; CASE 5C.2: hanging colon on an inher intro
|
||
((eq char-before-ip ?:)
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-syntax 'inher-intro (c-point 'boi))
|
||
(if inclass-p
|
||
(c-add-class-syntax 'inclass inclass-p paren-state)))
|
||
;; CASE 5C.3: in a Java implements/extends
|
||
(injava-inher
|
||
(let ((where (cdr injava-inher))
|
||
(cont (car injava-inher)))
|
||
(goto-char where)
|
||
(cond ((looking-at "throws\\>[^_]")
|
||
(c-add-syntax 'func-decl-cont
|
||
(progn (c-beginning-of-statement-1 lim)
|
||
(c-point 'boi))))
|
||
(cont (c-add-syntax 'inher-cont where))
|
||
(t (c-add-syntax 'inher-intro
|
||
(progn (goto-char (cdr injava-inher))
|
||
(c-beginning-of-statement-1 lim)
|
||
(point))))
|
||
)))
|
||
;; CASE 5C.4: a continued inheritance line
|
||
(t
|
||
(c-beginning-of-inheritance-list lim)
|
||
(c-add-syntax 'inher-cont (point))
|
||
;; don't add inclass symbol since relative point already
|
||
;; contains any class offset
|
||
)))
|
||
;; CASE 5D: this could be a top-level initialization, a
|
||
;; member init list continuation, or a template argument
|
||
;; list continuation.
|
||
((c-with-syntax-table (if (c-major-mode-is 'c++-mode)
|
||
c++-template-syntax-table
|
||
(syntax-table))
|
||
(save-excursion
|
||
;; Note: We use the fact that lim is always after any
|
||
;; preceding brace sexp.
|
||
(while (and (zerop (c-backward-token-2 1 t lim))
|
||
(not (looking-at "[;<,=]"))))
|
||
(or (memq (char-after) '(?, ?=))
|
||
(and (c-major-mode-is 'c++-mode)
|
||
(zerop (c-backward-token-2 1 nil lim))
|
||
(eq (char-after) ?<)))))
|
||
(goto-char indent-point)
|
||
(setq placeholder
|
||
(c-beginning-of-member-init-list lim))
|
||
(cond
|
||
;; CASE 5D.1: hanging member init colon, but watch out
|
||
;; for bogus matches on access specifiers inside classes.
|
||
((and placeholder
|
||
(save-excursion
|
||
(setq placeholder (point))
|
||
(c-backward-token-2 1 t lim)
|
||
(and (eq (char-after) ?:)
|
||
(not (eq (char-before) ?:))))
|
||
(save-excursion
|
||
(goto-char placeholder)
|
||
(back-to-indentation)
|
||
(or
|
||
(/= (car (save-excursion
|
||
(parse-partial-sexp (point) placeholder)))
|
||
0)
|
||
(and
|
||
(if c-opt-access-key
|
||
(not (looking-at c-opt-access-key)) t)
|
||
(not (looking-at c-class-key))
|
||
(if c-opt-bitfield-key
|
||
(not (looking-at c-opt-bitfield-key)) t))
|
||
)))
|
||
(goto-char placeholder)
|
||
(c-forward-syntactic-ws)
|
||
(c-add-syntax 'member-init-cont (point))
|
||
;; we do not need to add class offset since relative
|
||
;; point is the member init above us
|
||
)
|
||
;; CASE 5D.2: non-hanging member init colon
|
||
((progn
|
||
(c-forward-syntactic-ws indent-point)
|
||
(eq (char-after) ?:))
|
||
(skip-chars-forward " \t:")
|
||
(c-add-syntax 'member-init-cont (point)))
|
||
;; CASE 5D.3: perhaps a template list continuation?
|
||
((and (c-major-mode-is 'c++-mode)
|
||
(save-excursion
|
||
(save-restriction
|
||
(c-with-syntax-table c++-template-syntax-table
|
||
(goto-char indent-point)
|
||
(setq placeholder (c-up-list-backward (point)))
|
||
(and placeholder
|
||
(eq (char-after placeholder) ?<))))))
|
||
;; we can probably indent it just like an arglist-cont
|
||
(goto-char placeholder)
|
||
(c-beginning-of-statement-1 lim t)
|
||
(c-add-syntax 'template-args-cont (c-point 'boi)))
|
||
;; CASE 5D.4: perhaps a multiple inheritance line?
|
||
((and (c-major-mode-is 'c++-mode)
|
||
(save-excursion
|
||
(c-beginning-of-statement-1 lim)
|
||
(setq placeholder (point))
|
||
(if (looking-at "static\\>[^_]")
|
||
(c-forward-token-2 1 nil indent-point))
|
||
(and (looking-at c-class-key)
|
||
(zerop (c-forward-token-2 2 nil indent-point))
|
||
(if (eq (char-after) ?<)
|
||
(c-with-syntax-table c++-template-syntax-table
|
||
(zerop (c-forward-token-2 1 t indent-point)))
|
||
t)
|
||
(eq (char-after) ?:))))
|
||
(goto-char placeholder)
|
||
(c-add-syntax 'inher-cont (c-point 'boi)))
|
||
;; CASE 5D.5: Continuation of the "expression part" of a
|
||
;; top level construct.
|
||
(t
|
||
(while (and (eq (car (c-beginning-of-decl-1 containing-sexp))
|
||
'same)
|
||
(save-excursion
|
||
(c-backward-syntactic-ws)
|
||
(eq (char-before) ?}))))
|
||
(c-add-stmt-syntax
|
||
(if (eq char-before-ip ?,)
|
||
;; A preceding comma at the top level means that a
|
||
;; new variable declaration starts here. Use
|
||
;; topmost-intro-cont for it, for consistency with
|
||
;; the first variable declaration. C.f. case 5N.
|
||
'topmost-intro-cont
|
||
'statement-cont)
|
||
nil nil nil containing-sexp paren-state))
|
||
))
|
||
;; CASE 5E: we are looking at a access specifier
|
||
((and inclass-p
|
||
c-opt-access-key
|
||
(looking-at c-opt-access-key))
|
||
(setq placeholder (c-add-class-syntax 'inclass inclass-p
|
||
paren-state))
|
||
;; Append access-label with the same anchor point as inclass gets.
|
||
(c-append-syntax 'access-label placeholder))
|
||
;; CASE 5F: Close of a non-class declaration level block.
|
||
((and inenclosing-p
|
||
(eq char-after-ip ?}))
|
||
(c-add-syntax (intern (concat inenclosing-p "-close"))
|
||
(aref inclass-p 0)))
|
||
;; CASE 5G: we are looking at the brace which closes the
|
||
;; enclosing nested class decl
|
||
((and inclass-p
|
||
(eq char-after-ip ?})
|
||
(save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(forward-char 1)
|
||
(and (c-safe (c-backward-sexp 1) t)
|
||
(= (point) (aref inclass-p 1))
|
||
))))
|
||
(c-add-class-syntax 'class-close inclass-p paren-state))
|
||
;; CASE 5H: we could be looking at subsequent knr-argdecls
|
||
((and c-recognize-knr-p
|
||
(not (eq char-before-ip ?}))
|
||
(save-excursion
|
||
(setq placeholder (cdr (c-beginning-of-decl-1 lim)))
|
||
(and placeholder
|
||
;; Do an extra check to avoid tripping up on
|
||
;; statements that occur in invalid contexts
|
||
;; (e.g. in macro bodies where we don't really
|
||
;; know the context of what we're looking at).
|
||
(not (and c-opt-block-stmt-key
|
||
(looking-at c-opt-block-stmt-key)))))
|
||
(< placeholder indent-point))
|
||
(goto-char placeholder)
|
||
(c-add-syntax 'knr-argdecl (point)))
|
||
;; CASE 5I: ObjC method definition.
|
||
((and c-opt-method-key
|
||
(looking-at c-opt-method-key))
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-syntax 'objc-method-intro (c-point 'boi)))
|
||
;; CASE 5P: AWK pattern or function or continuation
|
||
;; thereof.
|
||
((c-mode-is-new-awk-p)
|
||
(setq placeholder (point))
|
||
(c-add-stmt-syntax
|
||
(if (and (eq (c-beginning-of-statement-1) 'same)
|
||
(/= (point) placeholder))
|
||
'topmost-intro-cont
|
||
'topmost-intro)
|
||
nil nil nil
|
||
containing-sexp paren-state))
|
||
;; CASE 5N: At a variable declaration that follows a class
|
||
;; definition or some other block declaration that doesn't
|
||
;; end at the closing '}'. C.f. case 5D.5.
|
||
((progn
|
||
(c-backward-syntactic-ws lim)
|
||
(and (eq (char-before) ?})
|
||
(save-excursion
|
||
(let ((start (point)))
|
||
(if paren-state
|
||
;; Speed up the backward search a bit.
|
||
(goto-char (car (car paren-state))))
|
||
(c-beginning-of-decl-1 containing-sexp)
|
||
(setq placeholder (point))
|
||
(if (= start (point))
|
||
;; The '}' is unbalanced.
|
||
nil
|
||
(c-end-of-decl-1)
|
||
(>= (point) indent-point))))))
|
||
(goto-char placeholder)
|
||
(c-add-stmt-syntax 'topmost-intro-cont nil nil nil
|
||
containing-sexp paren-state))
|
||
;; CASE 5J: we are at the topmost level, make
|
||
;; sure we skip back past any access specifiers
|
||
((progn
|
||
(while (and inclass-p
|
||
c-opt-access-key
|
||
(not (bobp))
|
||
(save-excursion
|
||
(c-safe (c-backward-sexp 1) t)
|
||
(looking-at c-opt-access-key)))
|
||
(c-backward-sexp 1)
|
||
(c-backward-syntactic-ws lim))
|
||
(or (bobp)
|
||
(if (c-mode-is-new-awk-p)
|
||
(not (c-awk-prev-line-incomplete-p))
|
||
(memq (char-before) '(?\; ?})))
|
||
(and (c-major-mode-is 'objc-mode)
|
||
(progn
|
||
(c-beginning-of-statement-1 lim)
|
||
(eq (char-after) ?@)))))
|
||
;; real beginning-of-line could be narrowed out due to
|
||
;; enclosure in a class block
|
||
(save-restriction
|
||
(widen)
|
||
(c-add-syntax 'topmost-intro (c-point 'bol))
|
||
;; Using bol instead of boi above is highly bogus, and
|
||
;; it makes our lives hard to remain compatible. :P
|
||
(if inclass-p
|
||
(progn
|
||
(goto-char (aref inclass-p 1))
|
||
(or (= (point) (c-point 'boi))
|
||
(goto-char (aref inclass-p 0)))
|
||
(if inenclosing-p
|
||
(c-add-syntax (intern (concat "in" inenclosing-p))
|
||
(c-point 'boi))
|
||
(c-add-class-syntax 'inclass inclass-p paren-state))
|
||
))
|
||
(when (and c-syntactic-indentation-in-macros
|
||
macro-start
|
||
(/= macro-start (c-point 'boi indent-point)))
|
||
(c-add-syntax 'cpp-define-intro)
|
||
(setq macro-start nil))
|
||
))
|
||
;; CASE 5K: we are at an ObjC method definition
|
||
;; continuation line.
|
||
((and c-opt-method-key
|
||
(progn
|
||
(c-beginning-of-statement-1 lim)
|
||
(beginning-of-line)
|
||
(looking-at c-opt-method-key)))
|
||
(c-add-syntax 'objc-method-args-cont (point)))
|
||
;; CASE 5L: we are at the first argument of a template
|
||
;; arglist that begins on the previous line.
|
||
((eq (char-before) ?<)
|
||
(c-beginning-of-statement-1 (c-safe-position (point) paren-state))
|
||
(c-add-syntax 'template-args-cont (c-point 'boi)))
|
||
;; CASE 5M: we are at a topmost continuation line
|
||
(t
|
||
(c-beginning-of-statement-1 (c-safe-position (point) paren-state))
|
||
(c-add-syntax 'topmost-intro-cont (c-point 'boi)))
|
||
))
|
||
;; (CASE 6 has been removed.)
|
||
;; CASE 7: line is an expression, not a statement. Most
|
||
;; likely we are either in a function prototype or a function
|
||
;; call argument list
|
||
((not (or (and c-special-brace-lists
|
||
(save-excursion
|
||
(goto-char containing-sexp)
|
||
(c-looking-at-special-brace-list)))
|
||
(eq (char-after containing-sexp) ?{)))
|
||
(cond
|
||
;; CASE 7A: we are looking at the arglist closing paren.
|
||
;; C.f. case 7F.
|
||
((memq char-after-ip '(?\) ?\]))
|
||
(goto-char containing-sexp)
|
||
(setq placeholder (c-point 'boi))
|
||
(if (and (c-safe (backward-up-list 1) t)
|
||
(>= (point) placeholder))
|
||
(progn
|
||
(forward-char)
|
||
(skip-chars-forward " \t"))
|
||
(goto-char placeholder))
|
||
(c-add-stmt-syntax 'arglist-close (list containing-sexp) t nil
|
||
(c-most-enclosing-brace paren-state (point))
|
||
(c-whack-state-after (point) paren-state)))
|
||
;; CASE 7B: Looking at the opening brace of an
|
||
;; in-expression block or brace list. C.f. cases 4, 16A
|
||
;; and 17E.
|
||
((and (eq char-after-ip ?{)
|
||
(progn
|
||
(setq placeholder (c-inside-bracelist-p (point)
|
||
c-state-cache))
|
||
(if placeholder
|
||
(setq tmpsymbol '(brace-list-open . inexpr-class))
|
||
(setq tmpsymbol '(block-open . inexpr-statement)
|
||
placeholder
|
||
(cdr-safe (c-looking-at-inexpr-block
|
||
(c-safe-position containing-sexp
|
||
paren-state)
|
||
containing-sexp)))
|
||
;; placeholder is nil if it's a block directly in
|
||
;; a function arglist. That makes us skip out of
|
||
;; this case.
|
||
)))
|
||
(goto-char placeholder)
|
||
(back-to-indentation)
|
||
(c-add-stmt-syntax (car tmpsymbol) nil t nil
|
||
(c-most-enclosing-brace paren-state (point))
|
||
(c-whack-state-after (point) paren-state))
|
||
(if (/= (point) placeholder)
|
||
(c-add-syntax (cdr tmpsymbol))))
|
||
;; CASE 7C: we are looking at the first argument in an empty
|
||
;; argument list. Use arglist-close if we're actually
|
||
;; looking at a close paren or bracket.
|
||
((memq char-before-ip '(?\( ?\[))
|
||
(goto-char containing-sexp)
|
||
(setq placeholder (c-point 'boi))
|
||
(when (and (c-safe (backward-up-list 1) t)
|
||
(>= (point) placeholder))
|
||
(forward-char)
|
||
(skip-chars-forward " \t")
|
||
(setq placeholder (point)))
|
||
(c-add-syntax 'arglist-intro placeholder))
|
||
;; CASE 7D: we are inside a conditional test clause. treat
|
||
;; these things as statements
|
||
((progn
|
||
(goto-char containing-sexp)
|
||
(and (c-safe (c-forward-sexp -1) t)
|
||
(looking-at "\\<for\\>[^_]")))
|
||
(goto-char (1+ containing-sexp))
|
||
(c-forward-syntactic-ws indent-point)
|
||
(if (eq char-before-ip ?\;)
|
||
(c-add-syntax 'statement (point))
|
||
(c-add-syntax 'statement-cont (point))
|
||
))
|
||
;; CASE 7E: maybe a continued ObjC method call. This is the
|
||
;; case when we are inside a [] bracketed exp, and what
|
||
;; precede the opening bracket is not an identifier.
|
||
((and c-opt-method-key
|
||
(eq (char-after containing-sexp) ?\[)
|
||
(progn
|
||
(goto-char (1- containing-sexp))
|
||
(c-backward-syntactic-ws (c-point 'bod))
|
||
(if (not (looking-at c-symbol-key))
|
||
(c-add-syntax 'objc-method-call-cont containing-sexp))
|
||
)))
|
||
;; CASE 7F: we are looking at an arglist continuation line,
|
||
;; but the preceding argument is on the same line as the
|
||
;; opening paren. This case includes multi-line
|
||
;; mathematical paren groupings, but we could be on a
|
||
;; for-list continuation line. C.f. case 7A.
|
||
((progn
|
||
(goto-char (1+ containing-sexp))
|
||
(skip-chars-forward " \t")
|
||
(and (not (eolp))
|
||
(not (looking-at "\\\\$"))))
|
||
(goto-char containing-sexp)
|
||
(setq placeholder (c-point 'boi))
|
||
(if (and (c-safe (backward-up-list 1) t)
|
||
(>= (point) placeholder))
|
||
(progn
|
||
(forward-char)
|
||
(skip-chars-forward " \t"))
|
||
(goto-char placeholder))
|
||
(c-add-stmt-syntax 'arglist-cont-nonempty (list containing-sexp)
|
||
t nil
|
||
(c-most-enclosing-brace c-state-cache (point))
|
||
(c-whack-state-after (point) paren-state)))
|
||
;; CASE 7G: we are looking at just a normal arglist
|
||
;; continuation line
|
||
(t (c-forward-syntactic-ws indent-point)
|
||
(c-add-syntax 'arglist-cont (c-point 'boi)))
|
||
))
|
||
;; CASE 8: func-local multi-inheritance line
|
||
((and (c-major-mode-is 'c++-mode)
|
||
(save-excursion
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
(looking-at c-opt-postfix-decl-spec-key)))
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
(cond
|
||
;; CASE 8A: non-hanging colon on an inher intro
|
||
((eq char-after-ip ?:)
|
||
(c-backward-syntactic-ws lim)
|
||
(c-add-syntax 'inher-intro (c-point 'boi)))
|
||
;; CASE 8B: hanging colon on an inher intro
|
||
((eq char-before-ip ?:)
|
||
(c-add-syntax 'inher-intro (c-point 'boi)))
|
||
;; CASE 8C: a continued inheritance line
|
||
(t
|
||
(c-beginning-of-inheritance-list lim)
|
||
(c-add-syntax 'inher-cont (point))
|
||
)))
|
||
;; CASE 9: we are inside a brace-list
|
||
((and (not (c-mode-is-new-awk-p)) ; Maybe this isn't needed (ACM, 2002/3/29)
|
||
(setq special-brace-list
|
||
(or (and c-special-brace-lists
|
||
(save-excursion
|
||
(goto-char containing-sexp)
|
||
(c-looking-at-special-brace-list)))
|
||
(c-inside-bracelist-p containing-sexp paren-state))))
|
||
(cond
|
||
;; CASE 9A: In the middle of a special brace list opener.
|
||
((and (consp special-brace-list)
|
||
(save-excursion
|
||
(goto-char containing-sexp)
|
||
(eq (char-after) ?\())
|
||
(eq char-after-ip (car (cdr special-brace-list))))
|
||
(goto-char (car (car special-brace-list)))
|
||
(skip-chars-backward " \t")
|
||
(if (and (bolp)
|
||
(assoc 'statement-cont
|
||
(setq placeholder (c-guess-basic-syntax))))
|
||
(setq c-syntactic-context placeholder)
|
||
(c-beginning-of-statement-1
|
||
(c-safe-position (1- containing-sexp) paren-state))
|
||
(c-forward-token-2 0)
|
||
(while (looking-at c-specifier-key)
|
||
(goto-char (match-end 1))
|
||
(c-forward-syntactic-ws))
|
||
(c-add-syntax 'brace-list-open (c-point 'boi))))
|
||
;; CASE 9B: brace-list-close brace
|
||
((if (consp special-brace-list)
|
||
;; Check special brace list closer.
|
||
(progn
|
||
(goto-char (car (car special-brace-list)))
|
||
(save-excursion
|
||
(goto-char indent-point)
|
||
(back-to-indentation)
|
||
(or
|
||
;; We were between the special close char and the `)'.
|
||
(and (eq (char-after) ?\))
|
||
(eq (1+ (point)) (cdr (car special-brace-list))))
|
||
;; We were before the special close char.
|
||
(and (eq (char-after) (cdr (cdr special-brace-list)))
|
||
(zerop (c-forward-token-2))
|
||
(eq (1+ (point)) (cdr (car special-brace-list)))))))
|
||
;; Normal brace list check.
|
||
(and (eq char-after-ip ?})
|
||
(c-safe (goto-char (c-up-list-backward (point))) t)
|
||
(= (point) containing-sexp)))
|
||
(if (eq (point) (c-point 'boi))
|
||
(c-add-syntax 'brace-list-close (point))
|
||
(setq lim (c-most-enclosing-brace c-state-cache (point)))
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-stmt-syntax 'brace-list-close nil t t lim
|
||
(c-whack-state-after (point) paren-state))))
|
||
(t
|
||
;; Prepare for the rest of the cases below by going to the
|
||
;; token following the opening brace
|
||
(if (consp special-brace-list)
|
||
(progn
|
||
(goto-char (car (car special-brace-list)))
|
||
(c-forward-token-2 1 nil indent-point))
|
||
(goto-char containing-sexp))
|
||
(forward-char)
|
||
(let ((start (point)))
|
||
(c-forward-syntactic-ws indent-point)
|
||
(goto-char (max start (c-point 'bol))))
|
||
(c-skip-ws-forward indent-point)
|
||
(cond
|
||
;; CASE 9C: we're looking at the first line in a brace-list
|
||
((= (point) indent-point)
|
||
(if (consp special-brace-list)
|
||
(goto-char (car (car special-brace-list)))
|
||
(goto-char containing-sexp))
|
||
(if (eq (point) (c-point 'boi))
|
||
(c-add-syntax 'brace-list-intro (point))
|
||
(setq lim (c-most-enclosing-brace c-state-cache (point)))
|
||
(c-beginning-of-statement-1 lim)
|
||
(c-add-stmt-syntax 'brace-list-intro nil t t lim
|
||
(c-whack-state-after (point) paren-state))))
|
||
;; CASE 9D: this is just a later brace-list-entry or
|
||
;; brace-entry-open
|
||
(t (if (or (eq char-after-ip ?{)
|
||
(and c-special-brace-lists
|
||
(save-excursion
|
||
(goto-char indent-point)
|
||
(c-forward-syntactic-ws (c-point 'eol))
|
||
(c-looking-at-special-brace-list (point)))))
|
||
(c-add-syntax 'brace-entry-open (point))
|
||
(c-add-syntax 'brace-list-entry (point))
|
||
))
|
||
))))
|
||
;; CASE 10: A continued statement or top level construct.
|
||
((and (if (c-mode-is-new-awk-p)
|
||
(c-awk-prev-line-incomplete-p containing-sexp) ; ACM 2002/3/29
|
||
(and (not (memq char-before-ip '(?\; ?:)))
|
||
(or (not (eq char-before-ip ?}))
|
||
(c-looking-at-inexpr-block-backward c-state-cache))))
|
||
(> (point)
|
||
(save-excursion
|
||
(c-beginning-of-statement-1 containing-sexp)
|
||
(setq placeholder (point))))
|
||
(/= placeholder containing-sexp))
|
||
;; This is shared with case 18.
|
||
(c-guess-continued-construct indent-point
|
||
char-after-ip
|
||
placeholder
|
||
containing-sexp
|
||
paren-state))
|
||
;; CASE 14: A case or default label
|
||
((looking-at c-label-kwds-regexp)
|
||
(goto-char containing-sexp)
|
||
(setq lim (c-most-enclosing-brace c-state-cache containing-sexp))
|
||
(c-backward-to-block-anchor lim)
|
||
(c-add-stmt-syntax 'case-label nil t nil
|
||
lim paren-state))
|
||
;; CASE 15: any other label
|
||
((looking-at c-label-key)
|
||
(goto-char containing-sexp)
|
||
(setq lim (c-most-enclosing-brace c-state-cache containing-sexp))
|
||
(save-excursion
|
||
(setq tmpsymbol
|
||
(if (and (eq (c-beginning-of-statement-1 lim) 'up)
|
||
(looking-at "switch\\>[^_]"))
|
||
;; If the surrounding statement is a switch then
|
||
;; let's analyze all labels as switch labels, so
|
||
;; that they get lined up consistently.
|
||
'case-label
|
||
'label)))
|
||
(c-backward-to-block-anchor lim)
|
||
(c-add-stmt-syntax tmpsymbol nil t nil
|
||
lim paren-state))
|
||
;; CASE 16: block close brace, possibly closing the defun or
|
||
;; the class
|
||
((eq char-after-ip ?})
|
||
;; From here on we have the next containing sexp in lim.
|
||
(setq lim (c-most-enclosing-brace paren-state))
|
||
(goto-char containing-sexp)
|
||
(cond
|
||
;; CASE 16E: Closing a statement block? This catches
|
||
;; cases where it's preceded by a statement keyword,
|
||
;; which works even when used in an "invalid" context,
|
||
;; e.g. a macro argument.
|
||
((c-after-conditional)
|
||
(c-backward-to-block-anchor lim)
|
||
(c-add-stmt-syntax 'block-close nil t nil
|
||
lim paren-state))
|
||
;; CASE 16A: closing a lambda defun or an in-expression
|
||
;; block? C.f. cases 4, 7B and 17E.
|
||
((setq placeholder (c-looking-at-inexpr-block
|
||
(c-safe-position containing-sexp paren-state)
|
||
nil))
|
||
(setq tmpsymbol (if (eq (car placeholder) 'inlambda)
|
||
'inline-close
|
||
'block-close))
|
||
(goto-char containing-sexp)
|
||
(back-to-indentation)
|
||
(if (= containing-sexp (point))
|
||
(c-add-syntax tmpsymbol (point))
|
||
(goto-char (cdr placeholder))
|
||
(back-to-indentation)
|
||
(c-add-stmt-syntax tmpsymbol nil t nil
|
||
(c-most-enclosing-brace paren-state (point))
|
||
(c-whack-state-after (point) paren-state))
|
||
(if (/= (point) (cdr placeholder))
|
||
(c-add-syntax (car placeholder)))))
|
||
;; CASE 16B: does this close an inline or a function in
|
||
;; a non-class declaration level block?
|
||
((setq placeholder (c-search-uplist-for-classkey paren-state))
|
||
(c-backward-to-decl-anchor lim)
|
||
(back-to-indentation)
|
||
(if (save-excursion
|
||
(goto-char (aref placeholder 0))
|
||
(looking-at c-other-decl-block-key))
|
||
(c-add-syntax 'defun-close (point))
|
||
(c-add-syntax 'inline-close (point))))
|
||
;; CASE 16F: Can be a defun-close of a function declared
|
||
;; in a statement block, e.g. in Pike or when using gcc
|
||
;; extensions, but watch out for macros followed by
|
||
;; blocks. Let it through to be handled below.
|
||
;; C.f. cases B.3 and 17G.
|
||
((and (not inenclosing-p)
|
||
lim
|
||
(save-excursion
|
||
(and (not (c-looking-at-bos))
|
||
(eq (c-beginning-of-statement-1 lim nil nil t) 'same)
|
||
(setq placeholder (point))
|
||
;; Look for a type or identifier followed by a
|
||
;; symbol, i.e. the start of a function declaration.
|
||
;; Doesn't work for declarations like "int *foo()
|
||
;; ..."; we'd need to refactor the more competent
|
||
;; analysis in `c-font-lock-declarations' for that.
|
||
(c-forward-type)
|
||
(progn
|
||
(c-forward-syntactic-ws)
|
||
(looking-at c-symbol-start)))))
|
||
(back-to-indentation)
|
||
(if (/= (point) containing-sexp)
|
||
(goto-char placeholder))
|
||
(c-add-stmt-syntax 'defun-close nil t nil
|
||
lim paren-state))
|
||
;; CASE 16C: if there an enclosing brace that hasn't
|
||
;; been narrowed out by a class, then this is a
|
||
;; block-close. C.f. case 17H.
|
||
((and (not inenclosing-p) lim)
|
||
;; If the block is preceded by a case/switch label on
|
||
;; the same line, we anchor at the first preceding label
|
||
;; at boi. The default handling in c-add-stmt-syntax is
|
||
;; really fixes it better, but we do like this to keep
|
||
;; the indentation compatible with version 5.28 and
|
||
;; earlier.
|
||
(while (and (/= (setq placeholder (point)) (c-point 'boi))
|
||
(eq (c-beginning-of-statement-1 lim) 'label)))
|
||
(goto-char placeholder)
|
||
(if (looking-at c-label-kwds-regexp)
|
||
(c-add-syntax 'block-close (point))
|
||
(goto-char containing-sexp)
|
||
;; c-backward-to-block-anchor not necessary here; those
|
||
;; situations are handled in case 16E above.
|
||
(c-add-stmt-syntax 'block-close nil t nil
|
||
lim paren-state)))
|
||
;; CASE 16D: find out whether we're closing a top-level
|
||
;; class or a defun
|
||
(t
|
||
(save-restriction
|
||
(narrow-to-region (point-min) indent-point)
|
||
(let ((decl (c-search-uplist-for-classkey (c-parse-state))))
|
||
(if decl
|
||
(c-add-class-syntax 'class-close decl paren-state)
|
||
(goto-char containing-sexp)
|
||
(c-backward-to-decl-anchor lim)
|
||
(back-to-indentation)
|
||
(c-add-syntax 'defun-close (point)))))
|
||
)))
|
||
;; CASE 17: Statement or defun catchall.
|
||
(t
|
||
(goto-char indent-point)
|
||
;; Back up statements until we find one that starts at boi.
|
||
(while (let* ((prev-point (point))
|
||
(last-step-type (c-beginning-of-statement-1
|
||
containing-sexp)))
|
||
(if (= (point) prev-point)
|
||
(progn
|
||
(setq step-type (or step-type last-step-type))
|
||
nil)
|
||
(setq step-type last-step-type)
|
||
(/= (point) (c-point 'boi)))))
|
||
(cond
|
||
;; CASE 17B: continued statement
|
||
((and (eq step-type 'same)
|
||
(/= (point) indent-point))
|
||
(c-add-stmt-syntax 'statement-cont nil nil nil
|
||
containing-sexp paren-state))
|
||
;; CASE 17A: After a case/default label?
|
||
((progn
|
||
(while (and (eq step-type 'label)
|
||
(not (looking-at c-label-kwds-regexp)))
|
||
(setq step-type
|
||
(c-beginning-of-statement-1 containing-sexp)))
|
||
(eq step-type 'label))
|
||
(c-add-stmt-syntax (if (eq char-after-ip ?{)
|
||
'statement-case-open
|
||
'statement-case-intro)
|
||
nil t nil containing-sexp paren-state))
|
||
;; CASE 17D: any old statement
|
||
((progn
|
||
(while (eq step-type 'label)
|
||
(setq step-type
|
||
(c-beginning-of-statement-1 containing-sexp)))
|
||
(eq step-type 'previous))
|
||
(c-add-stmt-syntax 'statement nil t nil
|
||
containing-sexp paren-state)
|
||
(if (eq char-after-ip ?{)
|
||
(c-add-syntax 'block-open)))
|
||
;; CASE 17I: Inside a substatement block.
|
||
((progn
|
||
;; The following tests are all based on containing-sexp.
|
||
(goto-char containing-sexp)
|
||
;; From here on we have the next containing sexp in lim.
|
||
(setq lim (c-most-enclosing-brace paren-state containing-sexp))
|
||
(c-after-conditional))
|
||
(c-backward-to-block-anchor lim)
|
||
(c-add-stmt-syntax 'statement-block-intro nil t nil
|
||
lim paren-state)
|
||
(if (eq char-after-ip ?{)
|
||
(c-add-syntax 'block-open)))
|
||
;; CASE 17E: first statement in an in-expression block.
|
||
;; C.f. cases 4, 7B and 16A.
|
||
((setq placeholder (c-looking-at-inexpr-block
|
||
(c-safe-position containing-sexp paren-state)
|
||
nil))
|
||
(setq tmpsymbol (if (eq (car placeholder) 'inlambda)
|
||
'defun-block-intro
|
||
'statement-block-intro))
|
||
(back-to-indentation)
|
||
(if (= containing-sexp (point))
|
||
(c-add-syntax tmpsymbol (point))
|
||
(goto-char (cdr placeholder))
|
||
(back-to-indentation)
|
||
(c-add-stmt-syntax tmpsymbol nil t nil
|
||
(c-most-enclosing-brace c-state-cache (point))
|
||
(c-whack-state-after (point) paren-state))
|
||
(if (/= (point) (cdr placeholder))
|
||
(c-add-syntax (car placeholder))))
|
||
(if (eq char-after-ip ?{)
|
||
(c-add-syntax 'block-open)))
|
||
;; CASE 17F: first statement in an inline, or first
|
||
;; statement in a top-level defun. we can tell this is it
|
||
;; if there are no enclosing braces that haven't been
|
||
;; narrowed out by a class (i.e. don't use bod here).
|
||
((save-excursion
|
||
(save-restriction
|
||
(widen)
|
||
(c-narrow-out-enclosing-class paren-state containing-sexp)
|
||
(not (c-most-enclosing-brace paren-state))))
|
||
(c-backward-to-decl-anchor lim)
|
||
(back-to-indentation)
|
||
(c-add-syntax 'defun-block-intro (point)))
|
||
;; CASE 17G: First statement in a function declared inside
|
||
;; a normal block. This can occur in Pike and with
|
||
;; e.g. the gcc extensions, but watch out for macros
|
||
;; followed by blocks. C.f. cases B.3 and 16F.
|
||
((save-excursion
|
||
(and (not (c-looking-at-bos))
|
||
(eq (c-beginning-of-statement-1 lim nil nil t) 'same)
|
||
(setq placeholder (point))
|
||
;; Look for a type or identifier followed by a
|
||
;; symbol, i.e. the start of a function declaration.
|
||
;; Doesn't work for declarations like "int *foo()
|
||
;; ..."; we'd need to refactor the more competent
|
||
;; analysis in `c-font-lock-declarations' for that.
|
||
(c-forward-type)
|
||
(progn
|
||
(c-forward-syntactic-ws)
|
||
(looking-at c-symbol-start))))
|
||
(back-to-indentation)
|
||
(if (/= (point) containing-sexp)
|
||
(goto-char placeholder))
|
||
(c-add-stmt-syntax 'defun-block-intro nil t nil
|
||
lim paren-state))
|
||
;; CASE 17H: First statement in a block. C.f. case 16C.
|
||
(t
|
||
;; If the block is preceded by a case/switch label on the
|
||
;; same line, we anchor at the first preceding label at
|
||
;; boi. The default handling in c-add-stmt-syntax is
|
||
;; really fixes it better, but we do like this to keep the
|
||
;; indentation compatible with version 5.28 and earlier.
|
||
(while (and (/= (setq placeholder (point)) (c-point 'boi))
|
||
(eq (c-beginning-of-statement-1 lim) 'label)))
|
||
(goto-char placeholder)
|
||
(if (looking-at c-label-kwds-regexp)
|
||
(c-add-syntax 'statement-block-intro (point))
|
||
(goto-char containing-sexp)
|
||
;; c-backward-to-block-anchor not necessary here; those
|
||
;; situations are handled in case 17I above.
|
||
(c-add-stmt-syntax 'statement-block-intro nil t nil
|
||
lim paren-state))
|
||
(if (eq char-after-ip ?{)
|
||
(c-add-syntax 'block-open)))
|
||
))
|
||
)
|
||
;; now we need to look at any modifiers
|
||
(goto-char indent-point)
|
||
(skip-chars-forward " \t")
|
||
;; are we looking at a comment only line?
|
||
(when (and (looking-at c-comment-start-regexp)
|
||
(/= (c-forward-token-2 0 nil (c-point 'eol)) 0))
|
||
(c-append-syntax 'comment-intro))
|
||
;; we might want to give additional offset to friends (in C++).
|
||
(when (and c-opt-friend-key
|
||
(looking-at c-opt-friend-key))
|
||
(c-append-syntax 'friend))
|
||
|
||
;; Set syntactic-relpos.
|
||
(let ((p c-syntactic-context))
|
||
(while (and p
|
||
(if (integerp (car-safe (cdr-safe (car p))))
|
||
(progn
|
||
(setq syntactic-relpos (car (cdr (car p))))
|
||
nil)
|
||
t))
|
||
(setq p (cdr p))))
|
||
|
||
;; Start of or a continuation of a preprocessor directive?
|
||
(if (and macro-start
|
||
(eq macro-start (c-point 'boi))
|
||
(not (and (c-major-mode-is 'pike-mode)
|
||
(eq (char-after (1+ macro-start)) ?\"))))
|
||
(c-append-syntax 'cpp-macro)
|
||
(when (and c-syntactic-indentation-in-macros macro-start)
|
||
(if in-macro-expr
|
||
(when (or
|
||
(< syntactic-relpos macro-start)
|
||
(not (or
|
||
(assq 'arglist-intro c-syntactic-context)
|
||
(assq 'arglist-cont c-syntactic-context)
|
||
(assq 'arglist-cont-nonempty c-syntactic-context)
|
||
(assq 'arglist-close c-syntactic-context))))
|
||
;; If inside a cpp expression, i.e. anywhere in a
|
||
;; cpp directive except a #define body, we only let
|
||
;; through the syntactic analysis that is internal
|
||
;; in the expression. That means the arglist
|
||
;; elements, if they are anchored inside the cpp
|
||
;; expression.
|
||
(setq c-syntactic-context nil)
|
||
(c-add-syntax 'cpp-macro-cont macro-start))
|
||
(when (and (eq macro-start syntactic-relpos)
|
||
(not (assq 'cpp-define-intro c-syntactic-context))
|
||
(save-excursion
|
||
(goto-char macro-start)
|
||
(or (not (c-forward-to-cpp-define-body))
|
||
(<= (point) (c-point 'boi indent-point)))))
|
||
;; Inside a #define body and the syntactic analysis is
|
||
;; anchored on the start of the #define. In this case
|
||
;; we add cpp-define-intro to get the extra
|
||
;; indentation of the #define body.
|
||
(c-add-syntax 'cpp-define-intro)))))
|
||
;; return the syntax
|
||
c-syntactic-context))))
|
||
|
||
|
||
;; Indentation calculation.
|
||
|
||
(defun c-evaluate-offset (offset langelem symbol)
|
||
;; offset can be a number, a function, a variable, a list, or one of
|
||
;; the symbols + or -
|
||
(cond
|
||
((eq offset '+) c-basic-offset)
|
||
((eq offset '-) (- c-basic-offset))
|
||
((eq offset '++) (* 2 c-basic-offset))
|
||
((eq offset '--) (* 2 (- c-basic-offset)))
|
||
((eq offset '*) (/ c-basic-offset 2))
|
||
((eq offset '/) (/ (- c-basic-offset) 2))
|
||
((numberp offset) offset)
|
||
((functionp offset) (c-evaluate-offset
|
||
(funcall offset
|
||
(cons (car langelem)
|
||
(car-safe (cdr langelem))))
|
||
langelem symbol))
|
||
((vectorp offset) offset)
|
||
((null offset) nil)
|
||
((listp offset)
|
||
(if (eq (car offset) 'quote)
|
||
(error
|
||
"Setting in c-offsets-alist element \"(%s . '%s)\" was mistakenly quoted"
|
||
symbol (cadr offset)))
|
||
(let (done)
|
||
(while (and (not done) offset)
|
||
(setq done (c-evaluate-offset (car offset) langelem symbol)
|
||
offset (cdr offset)))
|
||
(if (and c-strict-syntax-p (not done))
|
||
(c-benign-error "No offset found for syntactic symbol %s" symbol))
|
||
done))
|
||
(t (symbol-value offset))
|
||
))
|
||
|
||
(defun c-calc-offset (langelem)
|
||
;; Get offset from LANGELEM which is a list beginning with the
|
||
;; syntactic symbol and followed by any analysis data it provides.
|
||
;; That data may be zero or more elements, but if at least one is
|
||
;; given then the first is the relpos (or nil). The symbol is
|
||
;; matched against `c-offsets-alist' and the offset calculated from
|
||
;; that is returned.
|
||
(let* ((symbol (car langelem))
|
||
(match (assq symbol c-offsets-alist))
|
||
(offset (cdr-safe match)))
|
||
(if match
|
||
(setq offset (c-evaluate-offset offset langelem symbol))
|
||
(if c-strict-syntax-p
|
||
(c-benign-error "No offset found for syntactic symbol %s" symbol))
|
||
(setq offset 0))
|
||
(if (vectorp offset)
|
||
offset
|
||
(or (and (numberp offset) offset)
|
||
(and (symbolp offset) (symbol-value offset))
|
||
0))
|
||
))
|
||
|
||
(defun c-get-offset (langelem)
|
||
;; This is a compatibility wrapper for `c-calc-offset' in case
|
||
;; someone is calling it directly. It takes an old style syntactic
|
||
;; element on the form (SYMBOL . RELPOS) and converts it to the new
|
||
;; list form.
|
||
(if (cdr langelem)
|
||
(c-calc-offset (list (car langelem) (cdr langelem)))
|
||
(c-calc-offset langelem)))
|
||
|
||
(defun c-get-syntactic-indentation (langelems)
|
||
;; Calculate the syntactic indentation from a syntactic description
|
||
;; as returned by `c-guess-syntax'.
|
||
;;
|
||
;; Note that topmost-intro always has a relpos at bol, for
|
||
;; historical reasons. It's often used together with other symbols
|
||
;; that has more sane positions. Since we always use the first
|
||
;; found relpos, we rely on that these other symbols always precede
|
||
;; topmost-intro in the LANGELEMS list.
|
||
(let ((indent 0) anchor)
|
||
|
||
(while langelems
|
||
(let* ((c-syntactic-element (car langelems))
|
||
(res (c-calc-offset c-syntactic-element)))
|
||
|
||
(if (vectorp res)
|
||
;; Got an absolute column that overrides any indentation
|
||
;; we've collected so far, but not the relative
|
||
;; indentation we might get for the nested structures
|
||
;; further down the langelems list.
|
||
(setq indent (elt res 0)
|
||
anchor (point-min)) ; A position at column 0.
|
||
|
||
;; Got a relative change of the current calculated
|
||
;; indentation.
|
||
(setq indent (+ indent res))
|
||
|
||
;; Use the anchor position from the first syntactic
|
||
;; element with one.
|
||
(unless anchor
|
||
(let ((relpos (car-safe (cdr (car langelems)))))
|
||
(if relpos
|
||
(setq anchor relpos)))))
|
||
|
||
(setq langelems (cdr langelems))))
|
||
|
||
(if anchor
|
||
(+ indent (save-excursion
|
||
(goto-char anchor)
|
||
(current-column)))
|
||
indent)))
|
||
|
||
|
||
(cc-provide 'cc-engine)
|
||
|
||
;;; arch-tag: 149add18-4673-4da5-ac47-6805e4eae089
|
||
;;; cc-engine.el ends here
|