clang-modernize-3.6(1)
NAME
clang-modernize - manual page for clang-modernize 3.6
DESCRIPTION
ERROR: ld.so: object 'libfakeroot-sysv.so' from LD_PRELOAD cannot be
preloaded (cannot open shared object file): ignored. USAGE:
clang-modernize [options] [<sources>...]
OPTIONS:
Formatting Options:
-format - Enable formatting of code changed by
applying replacements.
Use -style to choose formatting style.
-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}"
-style-config=<string> - Path to a directory containing a
.clang-format file
describing a formatting style to use for formatting code when
-style=file.
Inclusion/Exclusion Options:
-exclude=<string> - Comma-separated list of paths that can not
be transformed
-exclude-from=<filename> - File containing a list of paths that can
not be transformed
-include=<string> - Comma-separated list of paths to consider
to be transformed
-include-from=<filename> - File containing a list of paths to
consider to be transformed
Modernizer Options:
-final-syntax-check - Check for correct syntax after applying
transformations
-for-compilers=<string> - Select transforms targeting the
intersection of
language features supported by the given compilers. Takes a
comma-separated list of <compiler>-<version>.
<compiler> can be any of: clang, gcc, icc, msvc
<version> is <major>[.<minor>]
-help - Display available options (-help-hidden
for more)
-help-list - Display list of available options
(-help-list-hidden for more)
-perf=<directory name> - Capture performance data and output to
specified directory. Default: ./migrate_perf
-risk - Select a maximum risk level:
=safe - Only safe transformations
=reasonable
- Enable transformations that might change semantics (default)
=risky - Enable transformations that are likely to change semantics
-summary - Print transform summary
-version - Display the version of this program
Serialization Options:
-serialize-dir=<string> - Path to an existing directory in which to
write
serialized replacements. Default behaviour is to write to a
temporary directory.
-serialize-replacements - Serialize translation unit replacements to
disk instead of changing files.
Transforms:
-add-override - Make use of override specifier where
possible
-loop-convert - Make use of range-based for loops where
possible
-pass-by-value - Pass parameters by value where possible
-replace-auto_ptr - Replace std::auto_ptr (deprecated) by
std::unique_ptr (EXPERIMENTAL)
-use-auto - Use of 'auto' type specifier
-use-nullptr - Make use of nullptr keyword where possible
Transforms' options:
-override-macros - Detect and use macros that expand to the
'override' keyword.
-user-null-macros=<string> - Comma-separated list of user-defined macro
names that behave like NULL
-p <build-path> is used to read a compile command database.
For example, it can be a CMake build directory in which a file
named compile_commands.json exists (use
-DCMAKE_EXPORT_COMPILE_COMMANDS=ON CMake option to get this
output). When no build path is specified, a search for
compile_commands.json will be attempted through all parent paths
of the first input file . See:
http://clang.llvm.org/docs/HowToSetupToolingForLLVM.html for an
example of setting up Clang Tooling on a source tree.
<source0> ... specify the paths of source files. These paths are
looked up in the compile command database. If the path of a file
is absolute, it needs to point into CMake's source tree. If the
path is relative, the current working directory needs to be in
the CMake source tree and the file must be in a subdirectory of
the current working directory. "./" prefixes in the relative
files will be automatically removed, but the rest of a relative
path must be a suffix of a path in the compile command database.
EXAMPLES:
Apply all transforms on a file that doesn't require compilation
arguments:
clang-modernize file.cpp
Convert for loops to ranged-based for loops for all files in the
compilation database that belong in a project subtree and then reformat
the code automatically using the LLVM style:
clang-modernize -p build/path -include project/path -format
-loop-convert
Make use of both nullptr and the override specifier, using git
ls-files:
git ls-files '*.cpp' | xargs -I{} clang-modernize -p build/path
\
-use-nullptr -add-override -override-macros {}
Apply all transforms supported by both clang >= 3.0 and gcc >= 4.7 to
foo.cpp and any included headers in bar:
clang-modernize -for-compilers=clang-3.0,gcc-4.7 foo.cpp \
-include bar -- -std=c++11 -Ibar
SEE ALSO
The full documentation for clang-modernize is maintained as a Texinfo
manual. If the info and clang-modernize programs are properly
installed at your site, the command
info clang-modernize
should give you access to the complete manual.
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