mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2024-12-04 12:15:46 +00:00
211 lines
8.6 KiB
ReStructuredText
211 lines
8.6 KiB
ReStructuredText
===========
|
|
ClangFormat
|
|
===========
|
|
|
|
`ClangFormat` describes a set of tools that are built on top of
|
|
:doc:`LibFormat`. It can support your workflow in a variety of ways including a
|
|
standalone tool and editor integrations.
|
|
|
|
|
|
Standalone Tool
|
|
===============
|
|
|
|
:program:`clang-format` is located in `clang/tools/clang-format` and can be used
|
|
to format C/C++/Java/JavaScript/Objective-C/Protobuf code.
|
|
|
|
.. code-block:: console
|
|
|
|
$ clang-format -help
|
|
OVERVIEW: A tool to format C/C++/Java/JavaScript/Objective-C/Protobuf code.
|
|
|
|
If no arguments are specified, it formats the code from standard input
|
|
and writes the result to the standard output.
|
|
If <file>s are given, it reformats the files. If -i is specified
|
|
together with <file>s, the files are edited in-place. Otherwise, the
|
|
result is written to the standard output.
|
|
|
|
USAGE: clang-format [options] [<file> ...]
|
|
|
|
OPTIONS:
|
|
|
|
Clang-format options:
|
|
|
|
-assume-filename=<string> - When reading from stdin, clang-format assumes this
|
|
filename to look for a style config file (with
|
|
-style=file) and to determine the language.
|
|
-cursor=<uint> - The position of the cursor when invoking
|
|
clang-format from an editor integration
|
|
-dump-config - Dump configuration options to stdout and exit.
|
|
Can be used with -style option.
|
|
-fallback-style=<string> - The name of the predefined style used as a
|
|
fallback in case clang-format is invoked with
|
|
-style=file, but can not find the .clang-format
|
|
file to use.
|
|
Use -fallback-style=none to skip formatting.
|
|
-i - Inplace edit <file>s, if specified.
|
|
-length=<uint> - Format a range of this length (in bytes).
|
|
Multiple ranges can be formatted by specifying
|
|
several -offset and -length pairs.
|
|
When only a single -offset is specified without
|
|
-length, clang-format will format up to the end
|
|
of the file.
|
|
Can only be used with one input file.
|
|
-lines=<string> - <start line>:<end line> - format a range of
|
|
lines (both 1-based).
|
|
Multiple ranges can be formatted by specifying
|
|
several -lines arguments.
|
|
Can't be used with -offset and -length.
|
|
Can only be used with one input file.
|
|
-offset=<uint> - Format a range starting at this byte offset.
|
|
Multiple ranges can be formatted by specifying
|
|
several -offset and -length pairs.
|
|
Can only be used with one input file.
|
|
-output-replacements-xml - Output replacements as XML.
|
|
-sort-includes - Sort touched include lines
|
|
-style=<string> - Coding style, currently supports:
|
|
LLVM, Google, Chromium, Mozilla, WebKit.
|
|
Use -style=file to load style configuration from
|
|
.clang-format file located in one of the parent
|
|
directories of the source file (or current
|
|
directory for stdin).
|
|
Use -style="{key: value, ...}" to set specific
|
|
parameters, e.g.:
|
|
-style="{BasedOnStyle: llvm, IndentWidth: 8}"
|
|
-verbose - If set, shows the list of processed files
|
|
|
|
Generic Options:
|
|
|
|
-help - Display available options (-help-hidden for more)
|
|
-help-list - Display list of available options (-help-list-hidden for more)
|
|
-version - Display the version of this program
|
|
|
|
|
|
When the desired code formatting style is different from the available options,
|
|
the style can be customized using the ``-style="{key: value, ...}"`` option or
|
|
by putting your style configuration in the ``.clang-format`` or ``_clang-format``
|
|
file in your project's directory and using ``clang-format -style=file``.
|
|
|
|
An easy way to create the ``.clang-format`` file is:
|
|
|
|
.. code-block:: console
|
|
|
|
clang-format -style=llvm -dump-config > .clang-format
|
|
|
|
Available style options are described in :doc:`ClangFormatStyleOptions`.
|
|
|
|
|
|
Vim Integration
|
|
===============
|
|
|
|
There is an integration for :program:`vim` which lets you run the
|
|
:program:`clang-format` standalone tool on your current buffer, optionally
|
|
selecting regions to reformat. The integration has the form of a `python`-file
|
|
which can be found under `clang/tools/clang-format/clang-format.py`.
|
|
|
|
This can be integrated by adding the following to your `.vimrc`:
|
|
|
|
.. code-block:: vim
|
|
|
|
map <C-K> :pyf <path-to-this-file>/clang-format.py<cr>
|
|
imap <C-K> <c-o>:pyf <path-to-this-file>/clang-format.py<cr>
|
|
|
|
The first line enables :program:`clang-format` for NORMAL and VISUAL mode, the
|
|
second line adds support for INSERT mode. Change "C-K" to another binding if
|
|
you need :program:`clang-format` on a different key (C-K stands for Ctrl+k).
|
|
|
|
With this integration you can press the bound key and clang-format will
|
|
format the current line in NORMAL and INSERT mode or the selected region in
|
|
VISUAL mode. The line or region is extended to the next bigger syntactic
|
|
entity.
|
|
|
|
It operates on the current, potentially unsaved buffer and does not create
|
|
or save any files. To revert a formatting, just undo.
|
|
|
|
An alternative option is to format changes when saving a file and thus to
|
|
have a zero-effort integration into the coding workflow. To do this, add this to
|
|
your `.vimrc`:
|
|
|
|
.. code-block:: vim
|
|
|
|
function! Formatonsave()
|
|
let l:formatdiff = 1
|
|
pyf ~/llvm/tools/clang/tools/clang-format/clang-format.py
|
|
endfunction
|
|
autocmd BufWritePre *.h,*.cc,*.cpp call Formatonsave()
|
|
|
|
|
|
Emacs Integration
|
|
=================
|
|
|
|
Similar to the integration for :program:`vim`, there is an integration for
|
|
:program:`emacs`. It can be found at `clang/tools/clang-format/clang-format.el`
|
|
and used by adding this to your `.emacs`:
|
|
|
|
.. code-block:: common-lisp
|
|
|
|
(load "<path-to-clang>/tools/clang-format/clang-format.el")
|
|
(global-set-key [C-M-tab] 'clang-format-region)
|
|
|
|
This binds the function `clang-format-region` to C-M-tab, which then formats the
|
|
current line or selected region.
|
|
|
|
|
|
BBEdit Integration
|
|
==================
|
|
|
|
:program:`clang-format` cannot be used as a text filter with BBEdit, but works
|
|
well via a script. The AppleScript to do this integration can be found at
|
|
`clang/tools/clang-format/clang-format-bbedit.applescript`; place a copy in
|
|
`~/Library/Application Support/BBEdit/Scripts`, and edit the path within it to
|
|
point to your local copy of :program:`clang-format`.
|
|
|
|
With this integration you can select the script from the Script menu and
|
|
:program:`clang-format` will format the selection. Note that you can rename the
|
|
menu item by renaming the script, and can assign the menu item a keyboard
|
|
shortcut in the BBEdit preferences, under Menus & Shortcuts.
|
|
|
|
|
|
Visual Studio Integration
|
|
=========================
|
|
|
|
Download the latest Visual Studio extension from the `alpha build site
|
|
<http://llvm.org/builds/>`_. The default key-binding is Ctrl-R,Ctrl-F.
|
|
|
|
|
|
Script for patch reformatting
|
|
=============================
|
|
|
|
The python script `clang/tools/clang-format/clang-format-diff.py` parses the
|
|
output of a unified diff and reformats all contained lines with
|
|
:program:`clang-format`.
|
|
|
|
.. code-block:: console
|
|
|
|
usage: clang-format-diff.py [-h] [-i] [-p NUM] [-regex PATTERN] [-style STYLE]
|
|
|
|
Reformat changed lines in diff. Without -i option just output the diff that
|
|
would be introduced.
|
|
|
|
optional arguments:
|
|
-h, --help show this help message and exit
|
|
-i apply edits to files instead of displaying a diff
|
|
-p NUM strip the smallest prefix containing P slashes
|
|
-regex PATTERN custom pattern selecting file paths to reformat
|
|
-style STYLE formatting style to apply (LLVM, Google, Chromium, Mozilla,
|
|
WebKit)
|
|
|
|
So to reformat all the lines in the latest :program:`git` commit, just do:
|
|
|
|
.. code-block:: console
|
|
|
|
git diff -U0 --no-color HEAD^ | clang-format-diff.py -i -p1
|
|
|
|
In an SVN client, you can do:
|
|
|
|
.. code-block:: console
|
|
|
|
svn diff --diff-cmd=diff -x -U0 | clang-format-diff.py -i
|
|
|
|
The option `-U0` will create a diff without context lines (the script would format
|
|
those as well).
|