@c Copyright (C) 1985-1987, 1993-1995, 1997, 1999-2012
@c Free Software Foundation, Inc.
@c See file emacs.texi for copying conditions.
-@node Programs, Building, Text, Top
+@node Programs
@chapter Editing Programs
@cindex Lisp editing
@cindex C editing
@cindex program editing
This chapter describes Emacs features for facilitating editing
-programs. Some of these features can:
+programs. Some of the things these features can do are:
@itemize @bullet
@item
@ifnotinfo
The Emacs distribution contains Info manuals for the major modes for
Ada, C/C++/Objective C/Java/Corba IDL/Pike/AWK, and IDLWAVE. For
-Fortran mode, see the ``Fortran'' section in the Info version of the
-Emacs manual, which is not included in this printed version.
+Fortran mode, @pxref{Fortran,,, emacs-xtra, Specialized Emacs Features}.
@end ifnotinfo
@node Defuns
highlights confusing opening delimiters (those that ought to be
quoted) in bold red.
+@vindex open-paren-in-column-0-is-defun-start
If you need to override this convention, you can do so by setting
-this user option:
-
-@defvar open-paren-in-column-0-is-defun-start
+the variable @code{open-paren-in-column-0-is-defun-start}.
If this user option is set to @code{t} (the default), opening
-parentheses or braces at column zero always start defuns. When it's
+parentheses or braces at column zero always start defuns. When it is
@code{nil}, defuns are found by searching for parens or braces at the
outermost level.
-@end defvar
Usually, you should leave this option at its default value of
@code{t}. If your buffer contains parentheses or braces in column
comment on the current line, along with the whitespace before it.
Since the comment is saved to the kill ring, you can reinsert it on
another line by moving to the end of that line, doing @kbd{C-y}, and
-then @kbd{M-;} to realign the command. You can achieve the same
+then @kbd{M-;} to realign the comment. You can achieve the same
effect as @kbd{C-u M-;} by typing @kbd{M-x comment-kill}
(@code{comment-dwim} actually calls @code{comment-kill} as a
subroutine when it is given a prefix argument).
use in your program.
@menu
-* Info Lookup:: Looking up library functions and commands
- in Info files.
+* Info Lookup:: Looking up library functions and commands in Info files.
* Man Page:: Looking up man pages of library functions and commands.
* Lisp Doc:: Looking up Emacs Lisp functions, etc.
@end menu
for a file name.
If you use @kbd{C-h S} in a major mode that does not support it,
-it asks you to specify the ``symbol help mode.'' You should enter
+it asks you to specify the ``symbol help mode''. You should enter
a command such as @code{c-mode} that would select a major
mode which @kbd{C-h S} does support.
the @command{man} program to format the corresponding man page. If
the system permits, it runs @command{man} asynchronously, so that you
can keep on editing while the page is being formatted. The result
-goes in a buffer named @samp{*Man @var{topic}*}. These buffers use a
+goes in a buffer named @file{*Man @var{topic}*}. These buffers use a
special major mode, Man mode, that facilitates scrolling and jumping
to other manual pages. For details, type @kbd{C-h m} while in a Man
mode buffer.
to format and display the man pages; the formatting is done by Emacs,
so it works on systems such as MS-Windows where the @command{man}
program may be unavailable. It prompts for a man page, and displays
-it in a buffer named @samp{*WoMan @var{section} @var{topic}}.
+it in a buffer named @file{*WoMan @var{section} @var{topic}}.
@kbd{M-x woman} computes the completion list for manpages the first
time you invoke the command. With a numeric argument, it recomputes
programming language major mode, indents the new lines which it
creates.
+@findex electric-layout-mode
+ Electric Layout mode (@kbd{M-x electric-layout-mode}) is a global
+minor mode that automatically inserts newlines when you type certain
+characters; for example, @samp{@{}, @samp{@}} and @samp{;} in Javascript
+mode.
+
Apart from Hideshow mode (@pxref{Hideshow}), another way to
selectively display parts of a program is to use the selective display
feature (@pxref{Selective Display}). Programming modes often also
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.'')
+(These are called ``C mode and related modes''.)
@ifinfo
@xref{Top,, CC Mode, ccmode, CC Mode}, for more details.
@end ifinfo
@kindex C-c C-l @r{(C mode)}
@findex c-toggle-electric-state
Toggle electric action (@code{c-toggle-electric-state}). With a
-prefix argument, this command enables electric action if the argument
-is positive, disables it if it is negative.
+positive prefix argument, this command enables electric action, with a
+negative one it disables it.
@end table
Electric characters insert newlines only when, in addition to the
@findex c-hungry-delete-backwards
@kindex C-c C-@key{DEL} (C Mode)
@kindex C-c @key{DEL} (C Mode)
-@code{c-hungry-delete-backwards}---Delete the entire block of whitespace
-preceding point.
+Delete the entire block of whitespace preceding point (@code{c-hungry-delete-backwards}).
@item C-c C-d
@itemx C-c C-@key{DELETE}
@kindex C-c C-d (C Mode)
@kindex C-c C-@key{DELETE} (C Mode)
@kindex C-c @key{DELETE} (C Mode)
-@code{c-hungry-delete-forward}---Delete the entire block of whitespace
-following point.
+Delete the entire block of whitespace after point (@code{c-hungry-delete-forward}).
@end table
As an alternative to the above commands, you can enable @dfn{hungry
@item M-x c-toggle-hungry-state
@findex c-toggle-hungry-state
Toggle the hungry-delete feature
-(@code{c-toggle-hungry-state})@footnote{This command had the binding
-@kbd{C-c C-d} in earlier versions of Emacs. @kbd{C-c C-d} is now
-bound to @code{c-hungry-delete-forward}.}. With a prefix argument,
+(@code{c-toggle-hungry-state}). With a prefix argument,
this command turns the hungry-delete feature on if the argument is
positive, and off if it is negative.
@end table
@kbd{C-j}. We use @code{c-initialization-hook} here to make sure
the keymap is loaded before we try to change it.
-@smallexample
+@example
(defun my-bind-clb ()
- (define-key c-mode-base-map "\C-j" 'c-context-line-break))
+ (define-key c-mode-base-map "\C-j"
+ 'c-context-line-break))
(add-hook 'c-initialization-hook 'my-bind-clb)
-@end smallexample
+@end example
@item C-M-h
Put mark at the end of a function definition, and put point at the
@cindex preprocessor highlighting
@findex cpp-highlight-buffer
Highlight parts of the text according to its preprocessor conditionals.
-This command displays another buffer named @samp{*CPP Edit*}, which
+This command displays another buffer named @file{*CPP Edit*}, which
serves as a graphic menu for selecting how to display particular kinds
of conditionals and their contents. After changing various settings,
click on @samp{[A]pply these settings} (or go to that buffer and type
HCoop / bpt / emacs.git / blobdiff