From mboxrd@z Thu Jan 1 00:00:00 1970 Path: main.gmane.org!not-for-mail From: Alan Mackenzie Newsgroups: gmane.emacs.devel Subject: Re: Update to programs.texi for CC Mode 5.30, and incidental amendments. Date: Sat, 15 May 2004 21:51:33 +0000 (GMT) Sender: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Message-ID: References: Reply-To: Alan Mackenzie NNTP-Posting-Host: deer.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Trace: sea.gmane.org 1084657878 19192 80.91.224.253 (15 May 2004 21:51:18 GMT) X-Complaints-To: usenet@sea.gmane.org NNTP-Posting-Date: Sat, 15 May 2004 21:51:18 +0000 (UTC) Original-X-From: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Sat May 15 23:51:05 2004 Return-path: Original-Received: from quimby.gnus.org ([80.91.224.244]) by deer.gmane.org with esmtp (Exim 3.35 #1 (Debian)) id 1BP73h-0005Me-00 for ; Sat, 15 May 2004 23:51:05 +0200 Original-Received: from monty-python.gnu.org ([199.232.76.173]) by quimby.gnus.org with esmtp (Exim 3.35 #1 (Debian)) id 1BP73h-0005OY-00 for ; Sat, 15 May 2004 23:51:05 +0200 Original-Received: from localhost ([127.0.0.1] helo=monty-python.gnu.org) by monty-python.gnu.org with esmtp (Exim 4.34) id 1BP72t-0004NR-UE for emacs-devel@quimby.gnus.org; Sat, 15 May 2004 17:50:16 -0400 Original-Received: from list by monty-python.gnu.org with tmda-scanned (Exim 4.34) id 1BP72k-0004Ga-6x for emacs-devel@gnu.org; Sat, 15 May 2004 17:50:06 -0400 Original-Received: from mail by monty-python.gnu.org with spam-scanned (Exim 4.34) id 1BP72B-00043F-RZ for emacs-devel@gnu.org; Sat, 15 May 2004 17:50:04 -0400 Original-Received: from [193.149.49.134] (helo=acm.acm) by monty-python.gnu.org with esmtp (Exim 4.34) id 1BP724-0003zF-N1 for emacs-devel@gnu.org; Sat, 15 May 2004 17:49:31 -0400 Original-Received: from localhost (root@localhost) by acm.acm (8.8.8/8.8.8) with SMTP id VAA00457 for ; Sat, 15 May 2004 21:51:34 GMT X-Sender: root@acm.acm Original-To: emacs-devel@gnu.org In-Reply-To: X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.4 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+emacs-devel=quimby.gnus.org@gnu.org Xref: main.gmane.org gmane.emacs.devel:23511 X-Report-Spam: http://spam.gmane.org/gmane.emacs.devel:23511 On Sun, 2 May 2004, Richard Stallman wrote (to me, not the list): >Thanks for working on this. I have corrections for a few small points. [8 corrections applied and incorporated into the attached patch.] > ! is, then the comment on the starting line is terminated and a new > ! comment is started on the new following line. If >It would be nice to rewrite that as active too. I've tried hard to do this, but failed. All my attempts come up looking awkward and contrived, with subjects like "the function" or "C-M-j or M-j or the the action of filling". In this paragraph, the focus must be on "the comment" or on "comment-multi-line", and this can only really be done with a verb in the passive voice. Setting something up as the subject of an active verb would make that subject almost as weak as the "It" in the sentence "It's raining.". I'd love somebody to prove me wrong here, and reconstruct this sentence and one or two others around it as robust active-voice sentences. Sometimes, I think, a passive verb is the right way of expressing something, just as sometimes a `goto' statement in C or even (dons asbestos longjohns) a split infinitive in English prose is. > @node Comments in C > @subsection Comments in C Modes > ! Here are the user options you can set to control the format of > ! comments in C and related modes. These are all C @dfn{style > ! variables} (@pxref{Styles,,, ccmode, the CC Mode Manual}). >To make the Emacs manual smaller, I think we should delete this section >entirely. The information is available in the ccmode info file. >It's not essential for the printed Emacs manual. DONE! I've not even put any extra reference to the CC Mode manual anywhere, as I consider that the "*Note CC Mode ... for a more extensive description ..." is adequate. Here is the (amended) patch: 2004-05-15 Alan Mackenzie * Programs.texi: Updated for CC Mode 5.30 and incidental amendments. ("AWK"): is consistently thus spelt throughout. (AWK, Pike): documented as "C-like modes". (@kbd{M-j}): documented as alternative to @kbd{C-M-j}. (M-x man): supersedes M-x manual-entry. Added numerous index entries. Corrected "ESC a/e" to "M-a/e". ("Comments in C"): This node has been removed, the level of detail it once gave now being considered excessive in the Emacs manual. (C-c., C-cC-c): New C Mode bindings. (C-u TAB, indent-code-rigidly, c-indent-exp, c-tab-always-indent, @dfn{Style}, c-default-style, comment-column, comment-padding, c-up-conditional, c-beginning-of-statement, c-end-of-statement, ....): definitions have been amended. (c-beginning-of-defun, c-end-of-defun, c-context-line-break): new function definitions. (c-comment-only-line-offset): Description removed (considered excessive) (c-comment-start-regexp, c-hanging-comment-ender-p, c-hanging-comment-starter-p): obsolete definitions removed. * emacs.texi: Remove the menu entry "Comments in C". *** emacs-1.78.texi Sat May 15 19:14:06 2004 --- emacs-1.78.acm.texi Sat May 15 19:53:20 2004 *************** *** 541,547 **** * Hungry Delete:: A more powerful DEL command. * Other C Commands:: Filling comments, viewing expansion of macros, and other neat features. - * Comments in C:: Options for customizing comment style. Fortran Mode --- 541,546 ---- *** programs-1.80.texi Thu Apr 22 18:36:49 2004 --- programs-1.80.acm.texi Sat May 15 21:45:24 2004 *************** *** 65,71 **** @cindex Perl mode @cindex Icon mode - @cindex Awk mode @cindex Makefile mode @cindex Tcl mode @cindex CPerl mode --- 65,70 ---- *************** *** 82,88 **** @cindex PostScript mode The existing programming language major modes include Lisp, Scheme (a variant of Lisp) and the Scheme-based DSSSL expression language, Ada, ! Awk, C, C++, Delphi (Object Pascal), Fortran (free format and fixed format), Icon, IDL (CORBA), IDLWAVE, Java, Metafont (@TeX{}'s companion for font creation), Modula2, Objective-C, Octave, Pascal, Perl, Pike, PostScript, Prolog, Simula, Tcl, and VHDL. There is --- 81,87 ---- @cindex PostScript mode The existing programming language major modes include Lisp, Scheme (a variant of Lisp) and the Scheme-based DSSSL expression language, Ada, ! AWK, C, C++, Delphi (Object Pascal), Fortran (free format and fixed format), Icon, IDL (CORBA), IDLWAVE, Java, Metafont (@TeX{}'s companion for font creation), Modula2, Objective-C, Octave, Pascal, Perl, Pike, PostScript, Prolog, Simula, Tcl, and VHDL. There is *************** *** 104,110 **** tab character before point, in these modes. Separate manuals are available for the modes for Ada (@pxref{Top, , Ada ! Mode, ada-mode, Ada Mode}), C/C++/Objective C/Java/Corba IDL (@pxref{Top, , CC Mode, ccmode, CC Mode}) and the IDLWAVE modes (@pxref{Top, , IDLWAVE, idlwave, IDLWAVE User Manual}). --- 103,109 ---- tab character before point, in these modes. Separate manuals are available for the modes for Ada (@pxref{Top, , Ada ! Mode, ada-mode, Ada Mode}), C/C++/Objective C/Java/Corba IDL/Pike/AWK (@pxref{Top, , CC Mode, ccmode, CC Mode}) and the IDLWAVE modes (@pxref{Top, , IDLWAVE, idlwave, IDLWAVE User Manual}). *************** *** 446,460 **** reindents the current line as usual, then reindents by the same amount all the lines in the parenthetical grouping starting on the current line. It is clever, though, and does not alter lines that start ! inside strings, or C preprocessor lines when in C mode. @findex indent-code-rigidly You can also perform this operation on the region, using the command @kbd{M-x indent-code-rigidly}. It rigidly shifts all the lines in the region sideways, like @code{indent-rigidly} does (@pxref{Indentation Commands}). It doesn't alter the indentation of lines that start ! inside a comment or a string, unless the region starts inside that ! comment or string. @node Lisp Indent @subsection Customizing Lisp Indentation --- 445,460 ---- reindents the current line as usual, then reindents by the same amount all the lines in the parenthetical grouping starting on the current line. It is clever, though, and does not alter lines that start ! inside strings. Neither does it alter C preprocessor lines when in C ! mode, but it does reindent any continuation lines that may be attached ! to them. @findex indent-code-rigidly You can also perform this operation on the region, using the command @kbd{M-x indent-code-rigidly}. It rigidly shifts all the lines in the region sideways, like @code{indent-rigidly} does (@pxref{Indentation Commands}). It doesn't alter the indentation of lines that start ! inside a string, unless the region also starts inside that string. @node Lisp Indent @subsection Customizing Lisp Indentation *************** *** 507,520 **** @kindex C-M-q @r{(C mode)} @findex c-indent-exp Reindent each line in the balanced expression that follows point ! (@code{c-indent-exp}). A prefix argument inhibits error checking and ! warning messages about invalid syntax. @item @key{TAB} @findex c-indent-command Reindent the current line, and/or in some cases insert a tab character (@code{c-indent-command}). If @code{c-tab-always-indent} is @code{t}, this command always reindents the current line and does nothing else. This is the default. --- 507,521 ---- @kindex C-M-q @r{(C mode)} @findex c-indent-exp Reindent each line in the balanced expression that follows point ! (@code{c-indent-exp}). A prefix argument inhibits warning messages ! about invalid syntax. @item @key{TAB} @findex c-indent-command Reindent the current line, and/or in some cases insert a tab character (@code{c-indent-command}). + @vindex c-tab-always-indent If @code{c-tab-always-indent} is @code{t}, this command always reindents the current line and does nothing else. This is the default. *************** *** 524,531 **** if @code{indent-tabs-mode} is @code{nil}). Any other value (not @code{nil} or @code{t}) means always reindent the ! line, and also insert a tab if within a comment, a string, or a ! preprocessor directive. @end table To reindent the whole current buffer, type @kbd{C-x h C-M-\}. This --- 525,531 ---- if @code{indent-tabs-mode} is @code{nil}). Any other value (not @code{nil} or @code{t}) means always reindent the ! line, and also insert a tab if within a comment or a string. @end table To reindent the whole current buffer, type @kbd{C-x h C-M-\}. This *************** *** 539,556 **** @subsection Customizing C Indentation @cindex style (for indentation) ! C mode and related modes use a simple yet flexible mechanism for ! customizing indentation. The mechanism works in two steps: first it ! classifies the line syntactically according to its contents and context; ! second, it associates each kind of syntactic construct with an ! indentation offset based on your selected @dfn{style}. @table @kbd ! @item M-x c-set-style @key{RET} @var{style} @key{RET} ! Select predefined indentation style @var{style}. @end table ! A style is a named collection of indentation customizations that can be used in C mode and the related modes. Emacs comes with several predefined styles, including @code{gnu}, @code{k&r}, @code{bsd}, @code{stroustrup}, @code{linux}, @code{python}, @code{java}, --- 539,557 ---- @subsection Customizing C Indentation @cindex style (for indentation) ! C mode and related modes use a flexible mechanism for customizing ! indentation. C mode indents a source line in two steps: first it ! classifies the line syntactically according to its contents and ! context; second, it determines the indentation offset associated by ! your selected @dfn{style} with the syntactic construct and adds this ! onto the indentation of the @dfn{anchor statement}. @table @kbd ! @item C-c . @key{RET} @var{style} @key{RET} ! Select a predefined style @var{style} (@code{c-set-style}). @end table ! A @dfn{style} is a named collection of customizations that can be used in C mode and the related modes. Emacs comes with several predefined styles, including @code{gnu}, @code{k&r}, @code{bsd}, @code{stroustrup}, @code{linux}, @code{python}, @code{java}, *************** *** 561,579 **** some code, e.g., by typing @key{C-M-q} at the start of a function definition. @findex c-set-style ! To choose a style for the current buffer, use the command @kbd{M-x ! c-set-style}. Specify a style name as an argument (case is not ! significant). This command affects the current buffer only, and it ! affects only future invocations of the indentation commands; it does ! not reindent the code in the buffer. To reindent the whole buffer in ! the new style, you can type @kbd{C-x h C-M-\}. @vindex c-default-style You can also set the variable @code{c-default-style} to specify the ! default style for various major modes. Its value should be an alist, ! in which each element specifies one major mode and which indentation ! style to use for it. For example, @example (setq c-default-style --- 562,582 ---- some code, e.g., by typing @key{C-M-q} at the start of a function definition. + @kindex C-c . @r{(C mode)} @findex c-set-style ! To choose a style for the current buffer, use the command @kbd{C-c ! .}. Specify a style name as an argument (case is not significant). ! This command affects the current buffer only, and it affects only ! future invocations of the indentation commands; it does not reindent ! the code in the buffer. To reindent the whole buffer in the new ! style, you can type @kbd{C-x h C-M-\}. @vindex c-default-style You can also set the variable @code{c-default-style} to specify the ! default style for various major modes. Its value should be either the ! style's name (a string) or an alist, in which each element specifies ! one major mode and which indentation style to use for it. For ! example, @example (setq c-default-style *************** *** 848,865 **** The comment commands in this table insert, kill and align comments. They are described in this section and following sections. ! @table @kbd ! @item M-; Insert or realign comment on current line; alternatively, comment or uncomment the region (@code{comment-dwim}). ! @item C-u M-; Kill comment on current line (@code{comment-kill}). ! @item C-x ; Set comment column (@code{comment-set-column}). ! @item C-M-j Like @key{RET} followed by inserting and aligning a comment (@code{comment-indent-new-line}). ! @item M-x comment-region Add or remove comment delimiters on all the lines in the region. @end table --- 851,870 ---- The comment commands in this table insert, kill and align comments. They are described in this section and following sections. ! @table @asis ! @item @kbd{M-;} Insert or realign comment on current line; alternatively, comment or uncomment the region (@code{comment-dwim}). ! @item @kbd{C-u M-;} Kill comment on current line (@code{comment-kill}). ! @item @kbd{C-x ;} Set comment column (@code{comment-set-column}). ! @item @kbd{C-M-j} ! @itemx @kbd{M-j} Like @key{RET} followed by inserting and aligning a comment (@code{comment-indent-new-line}). ! @item @kbd{M-x comment-region} ! @itemx @kbd{C-c C-c} (in C-like modes) Add or remove comment delimiters on all the lines in the region. @end table *************** *** 937,953 **** @subsection Multiple Lines of Comments @kindex C-M-j @cindex blank lines in programs @findex comment-indent-new-line If you are typing a comment and wish to continue it on another line, ! you can use the command @kbd{C-M-j} (@code{comment-indent-new-line}). ! This terminates the comment you are typing, creates a new blank line ! afterward, and begins a new comment indented under the old one. When ! Auto Fill mode is on, going past the fill column while typing a comment ! causes the comment to be continued in just this fashion. If point is ! not at the end of the line when @kbd{C-M-j} is typed, the text on ! the rest of the line becomes part of the new comment line. @findex comment-region To turn existing lines into comment lines, use the @kbd{M-x comment-region} command. It adds comment delimiters to the lines that start --- 942,961 ---- @subsection Multiple Lines of Comments @kindex C-M-j + @kindex M-j @cindex blank lines in programs @findex comment-indent-new-line If you are typing a comment and wish to continue it on another line, ! you can use the command @kbd{C-M-j} or @kbd{M-j} ! (@code{comment-indent-new-line}). This terminates the comment you are ! typing, creates a new blank line afterward, and begins a new comment ! indented under the old one. When Auto Fill mode is on, going past the ! fill column while typing a comment causes the comment to be continued ! in just this fashion. If point is not at the end of the line when you ! type the command, the text on the rest of the line becomes part of the ! new comment line. + @kindex C-c C-c (C mode) @findex comment-region To turn existing lines into comment lines, use the @kbd{M-x comment-region} command. It adds comment delimiters to the lines that start *************** *** 970,981 **** @vindex comment-column @kindex C-x ; @findex comment-set-column ! The comment column is stored in the variable @code{comment-column}. You ! can set it to a number explicitly. Alternatively, the command @kbd{C-x ;} ! (@code{comment-set-column}) sets the comment column to the column point is ! at. @kbd{C-u C-x ;} sets the comment column to match the last comment ! before point in the buffer, and then does a @kbd{M-;} to align the ! current line's comment under the previous one. The variable @code{comment-column} is per-buffer: setting the variable in the normal fashion affects only the current buffer, but there is a --- 978,990 ---- @vindex comment-column @kindex C-x ; @findex comment-set-column ! The @dfn{comment column}, the column at which Emacs tries to place ! comments, is stored in the variable @code{comment-column}. You can ! set it to a number explicitly. Alternatively, the command @kbd{C-x ;} ! (@code{comment-set-column}) sets the comment column to the column ! point is at. @kbd{C-u C-x ;} sets the comment column to match the ! last comment before point in the buffer, and then does a @kbd{M-;} to ! align the current line's comment under the previous one. The variable @code{comment-column} is per-buffer: setting the variable in the normal fashion affects only the current buffer, but there is a *************** *** 990,996 **** than the comment starting delimiter in the strictest sense of the word; for example, in C mode the value of the variable is @c This stops M-q from breaking the line inside that @code. ! @code{@w{"/\\*+ *\\|//+ *""}}, which matches extra stars and spaces after the @samp{/*} itself, and accepts C++ style comments also. (Note that @samp{\\} is needed in Lisp syntax to include a @samp{\} in the string, which is needed to deny the first star its special meaning --- 999,1005 ---- than the comment starting delimiter in the strictest sense of the word; for example, in C mode the value of the variable is @c This stops M-q from breaking the line inside that @code. ! @code{@w{"/\\*+ *\\|//+ *"}}, which matches extra stars and spaces after the @samp{/*} itself, and accepts C++ style comments also. (Note that @samp{\\} is needed in Lisp syntax to include a @samp{\} in the string, which is needed to deny the first star its special meaning *************** *** 1006,1026 **** @vindex comment-padding The variable @code{comment-padding} specifies how many spaces ! @code{comment-region} should insert on each line between the ! comment delimiter and the line's original text. The default is 1, ! to insert one space. @vindex comment-multi-line ! The variable @code{comment-multi-line} controls how @kbd{C-M-j} ! (@code{indent-new-comment-line}) behaves when used inside a comment. If ! @code{comment-multi-line} is @code{nil}, as it normally is, then the ! comment on the starting line is terminated and a new comment is started ! on the new following line. If @code{comment-multi-line} is not ! @code{nil}, then the new following line is set up as part of the same ! comment that was found on the starting line. This is done by not ! inserting a terminator on the old line, and not inserting a starter on ! the new line. In languages where multi-line comments work, the choice ! of value for this variable is a matter of taste. @vindex comment-indent-function The variable @code{comment-indent-function} should contain a function --- 1015,1037 ---- @vindex comment-padding The variable @code{comment-padding} specifies how many spaces ! @code{comment-region} should insert on each line between the comment ! delimiter and the line's original text. The default is 1, to insert ! one space. @code{nil} means 0. Alternatively, @code{comment-padding} ! can hold the actual string to insert. @vindex comment-multi-line ! The variable @code{comment-multi-line} controls how @kbd{C-M-j} or ! @kbd{M-j} (@code{indent-new-comment-line}) behaves when used inside a ! comment. If @code{comment-multi-line} is @code{nil}, as it normally ! is, then the comment on the starting line is terminated and a new ! comment is started on the new following line. If ! @code{comment-multi-line} is not @code{nil}, then the new following ! line is set up as part of the same comment that was found on the ! starting line. This is done by not inserting a terminator on the old ! line, and not inserting a starter on the new line. In languages where ! multi-line comments work, the choice of value for this variable is a ! matter of taste. @vindex comment-indent-function The variable @code{comment-indent-function} should contain a function *************** *** 1064,1070 **** You can also use @kbd{M-x info-lookup-file} to look for documentation for a file name. ! This feature currently supports the modes Awk, Autoconf, Bison, C, Emacs Lisp, LaTeX, M4, Makefile, Octave, Perl, Scheme, and Texinfo, provided you have installed the relevant Info files, which are typically available with the appropriate GNU package. --- 1075,1081 ---- You can also use @kbd{M-x info-lookup-file} to look for documentation for a file name. ! This feature currently supports the modes AWK, Autoconf, Bison, C, Emacs Lisp, LaTeX, M4, Makefile, Octave, Perl, Scheme, and Texinfo, provided you have installed the relevant Info files, which are typically available with the appropriate GNU package. *************** *** 1081,1087 **** @findex manual-entry You can read the man page for an operating system command, library ! function, or system call, with the @kbd{M-x manual-entry} command. It runs the @code{man} program to format the man page; if the system permits, it runs @code{man} asynchronously, so that you can keep on editing while the page is being formatted. (On MS-DOS and MS-Windows --- 1092,1098 ---- @findex manual-entry You can read the man page for an operating system command, library ! function, or system call, with the @kbd{M-x man} command. It runs the @code{man} program to format the man page; if the system permits, it runs @code{man} asynchronously, so that you can keep on editing while the page is being formatted. (On MS-DOS and MS-Windows *************** *** 1393,1417 **** @cindex CORBA IDL mode @cindex Objective C mode @cindex C++ mode @cindex mode, Java @cindex mode, C @cindex mode, Objective C @cindex mode, CORBA IDL @cindex mode, Pike This section gives a brief description of the special features ! available in C, C++, Objective-C, Java, CORBA IDL, and Pike modes. (These are called ``C mode and related modes.'') @xref{Top, , CC Mode, ccmode, CC Mode}, for a more extensive description of these modes and their special features. @menu ! * Motion in C:: Commands to move by C statements, etc. ! * Electric C:: Colon and other chars can automatically reindent. ! * Hungry Delete:: A more powerful DEL command. ! * Other C Commands:: Filling comments, viewing expansion of macros, ! and other neat features. ! * Comments in C:: Options for customizing comment style. @end menu @node Motion in C --- 1404,1430 ---- @cindex CORBA IDL mode @cindex Objective C mode @cindex C++ mode + @cindex AWK mode @cindex mode, Java @cindex mode, C + @cindex mode, C++ @cindex mode, Objective C @cindex mode, CORBA IDL @cindex mode, Pike + @cindex mode, AWK This section gives a brief description of the special features ! available in C, C++, Objective-C, Java, CORBA IDL, Pike and AWK modes. (These are called ``C mode and related modes.'') @xref{Top, , CC Mode, ccmode, CC Mode}, for a more extensive description of these modes and their special features. @menu ! * Motion in C:: Commands to move by C statements, etc. ! * Electric C:: Colon and other chars can automatically reindent. ! * Hungry Delete:: A more powerful DEL command. ! * Other C Commands:: Filling comments, viewing expansion of macros, ! and other neat features. @end menu @node Motion in C *************** *** 1421,1435 **** related modes. @table @code @item C-c C-u @kindex C-c C-u @r{(C mode)} @findex c-up-conditional Move point back to the containing preprocessor conditional, leaving the mark behind. A prefix argument acts as a repeat count. With a negative argument, move point forward to the end of the containing ! preprocessor conditional. When going backwards, @code{#elif} is treated ! like @code{#else} followed by @code{#if}. When going forwards, ! @code{#elif} is ignored.@refill @item C-c C-p @kindex C-c C-p @r{(C mode)} --- 1434,1462 ---- related modes. @table @code + @item M-x c-beginning-of-defun + @itemx M-x c-end-of-defun + @findex c-beginning-of-defun + @findex c-end-of-defun + Move point to the beginning or end of the current function or + top-level definition. These are found by searching for the least + enclosing braces. (By contrast, @code{beginning-of-defun} and + @code{end-of-defun} search for braces in column zero.) If you are + editing code where the opening brace of a function isn't placed in + column zero, you may wish to bind @code{C-M-a} and @code{C-M-e} to + these commands. @xref{Moving by Defuns}. + @item C-c C-u @kindex C-c C-u @r{(C mode)} @findex c-up-conditional Move point back to the containing preprocessor conditional, leaving the mark behind. A prefix argument acts as a repeat count. With a negative argument, move point forward to the end of the containing ! preprocessor conditional. ! ! @samp{#elif} is equivalent to @samp{#else} followed by @samp{#if}, so ! the function will stop at a @samp{#elif} when going backward, but not ! when going forward. @item C-c C-p @kindex C-c C-p @r{(C mode)} *************** *** 1446,1472 **** argument, move backward. @item M-a ! @kindex ESC a @findex c-beginning-of-statement Move point to the beginning of the innermost C statement (@code{c-beginning-of-statement}). If point is already at the beginning of a statement, move to the beginning of the preceding statement. With prefix argument @var{n}, move back @var{n} @minus{} 1 statements. ! If point is within a string or comment, or next to a comment (only ! whitespace between them), this command moves by sentences instead of ! statements. ! ! When called from a program, this function takes three optional ! arguments: the numeric prefix argument, a buffer position limit ! (don't move back before that place), and a flag that controls whether ! to do sentence motion when inside of a comment. @item M-e ! @kindex ESC e @findex c-end-of-statement ! Move point to the end of the innermost C statement; like @kbd{M-a} ! except that it moves in the other direction (@code{c-end-of-statement}). @item M-x c-backward-into-nomenclature @findex c-backward-into-nomenclature --- 1473,1494 ---- argument, move backward. @item M-a ! @kindex M-a (C mode) @findex c-beginning-of-statement Move point to the beginning of the innermost C statement (@code{c-beginning-of-statement}). If point is already at the beginning of a statement, move to the beginning of the preceding statement. With prefix argument @var{n}, move back @var{n} @minus{} 1 statements. ! In comments or in strings which span more than one line, this command ! moves by sentences instead of statements. @item M-e ! @kindex M-e (C mode) @findex c-end-of-statement ! Move point to the end of the innermost C statement or sentence; like ! @kbd{M-a} except that it moves in the other direction ! (@code{c-end-of-statement}). @item M-x c-backward-into-nomenclature @findex c-backward-into-nomenclature *************** *** 1530,1541 **** --- 1552,1565 ---- line or adding any newlines (@code{c-scope-operator}). @end table + @vindex c-electric-pound-behavior The electric @kbd{#} key reindents the line if it appears to be the beginning of a preprocessor directive. This happens when the value of @code{c-electric-pound-behavior} is @code{(alignleft)}. You can turn this feature off by setting @code{c-electric-pound-behavior} to @code{nil}. + @vindex c-hanging-braces-alist The variable @code{c-hanging-braces-alist} controls the insertion of newlines before and after inserted braces. It is an association list with elements of the following form: @code{(@var{syntactic-symbol} *************** *** 1550,1555 **** --- 1574,1580 ---- after, or both. If not found, the default is to insert a newline both before and after braces. + @vindex c-hanging-colons-alist The variable @code{c-hanging-colons-alist} controls the insertion of newlines before and after inserted colons. It is an association list with elements of the following form: @code{(@var{syntactic-symbol} *************** *** 1562,1567 **** --- 1587,1593 ---- If the syntactic symbol is not found in this list, no newlines are inserted. + @vindex c-cleanup-list Electric characters can also delete newlines automatically when the auto-newline feature is enabled. This feature makes auto-newline more acceptable, by deleting the newlines in the most common cases where you *************** *** 1613,1618 **** --- 1639,1645 ---- @node Hungry Delete @subsection Hungry Delete Feature in C + @cindex hungry deletion (C Mode) When the @dfn{hungry-delete} feature is enabled (indicated by @samp{/h} or @samp{/ah} in the mode line after the mode name), a single *************** *** 1642,1647 **** --- 1669,1689 ---- @subsection Other Commands for C Mode @table @kbd + @item M-x c-context-line-break + @findex c-context-line-break + This command inserts a line break and indents the new line in a manner + appropriate to the context. In normal code, it does the work of + @kbd{C-j} (@code{newline-and-indent}), in a C preprocessor line it + additionally inserts a @samp{\} at the line break, and within comments + it's like @kbd{M-j} (@code{c-indent-new-comment-line}). + + @code{c-context-line-break} isn't bound to a key by default, but it + needs a binding to be useful. The following code will bind it to + @kbd{C-j}. + @example + (define-key c-mode-base-map "\C-j" 'c-context-line-break) + @end example + @item C-M-h Put mark at the end of a function definition, and put point at the beginning (@code{c-mark-function}). *************** *** 1702,1707 **** --- 1744,1750 ---- @itemx M-x global-cwarn-mode @findex cwarn-mode @findex global-cwarn-mode + @vindex global-cwarn-mode @cindex CWarn mode @cindex suspicious constructions in C, C++ CWarn minor mode highlights certain suspicious C and C++ constructions: *************** *** 1739,1780 **** to a C/C++ source file, or vice versa. The variable @code{ff-related-file-alist} specifies how to compute related file names. - @end table - - @node Comments in C - @subsection Comments in C Modes - - C mode and related modes use a number of variables for controlling - comment format. - - @table @code - @item c-comment-only-line-offset - @vindex c-comment-only-line-offset - Extra offset for line which contains only the start of a comment. It - can be either an integer or a cons cell of the form - @code{(@var{non-anchored-offset} . @var{anchored-offset})}, where - @var{non-anchored-offset} is the amount of offset given to - non-column-zero anchored comment-only lines, and @var{anchored-offset} - is the amount of offset to give column-zero anchored comment-only lines. - Just an integer as value is equivalent to @code{(@var{val} . 0)}. - - @item c-comment-start-regexp - @vindex c-comment-start-regexp - This buffer-local variable specifies how to recognize the start of a comment. - - @item c-hanging-comment-ender-p - @vindex c-hanging-comment-ender-p - If this variable is @code{nil}, @code{c-fill-paragraph} leaves the - comment terminator of a block comment on a line by itself. The default - value is @code{t}, which puts the comment-end delimiter @samp{*/} at the - end of the last line of the comment text. - - @item c-hanging-comment-starter-p - @vindex c-hanging-comment-starter-p - If this variable is @code{nil}, @code{c-fill-paragraph} leaves the - starting delimiter of a block comment on a line by itself. The default - value is @code{t}, which puts the comment-start delimiter @samp{/*} at - the beginning of the first line of the comment text. @end table @node Fortran --- 1782,1787 ---- -- Alan Mackenzie (Munich, Germany)