clang-tidy

Run default checks on a source file

$ clang-tidy [path/to/file.cpp]

$ clang-tidy [path/to/file.cpp] -checks=[-*,cppcoreguidelines-*]

$ clang-tidy -checks=[*] -list-checks

$ clang-tidy [path/to/file.cpp] -- -I[my_project/include] -D[definitions]

USAGE: clang-tidy [options] <source0> [... <sourceN>]

OPTIONS:

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

clang-tidy options:

--checks=<string> -

Comma-separated list of globs with optional '-' prefix. Globs are processed in order of appearance in the list. Globs without '-' prefix add checks with matching names to the set, globs with the '-' prefix remove checks with matching names from the set of enabled checks. This option's value is appended to the value of the 'Checks' option in .clang-tidy file, if any.

--config=<string> -

Specifies a configuration in YAML/JSON format:

-config="{Checks: '*',

CheckOptions: [{key: x,

value: y}]}"

When the value is empty, clang-tidy will attempt to find a file named .clang-tidy for each source file in its parent directories.

--dump-config -

Dumps configuration in the YAML format to stdout. This option can be used along with a file name (and '--' if the file is outside of a project with configured compilation database). The configuration used for this file will be printed. Use along with -checks=* to include configuration of all checks.

--enable-check-profile -

Enable per-check timing profiles, and print a report to stderr.

--explain-config -

For each enabled check explains, where it is enabled, i.e. in clang-tidy binary, command line or a specific configuration file.

--export-fixes=<filename> -

YAML file to store suggested fixes in. The stored fixes can be applied to the input source code with clang-apply-replacements.

--extra-arg=<string> - Additional argument to append to the compiler command line

--extra-arg-before=<string> - Additional argument to prepend to the compiler command line

--fix -

Apply suggested fixes. Without -fix-errors clang-tidy will bail out if any compilation errors were found.

--fix-errors -

Apply suggested fixes even if compilation errors were found. If compiler errors have attached fix-its, clang-tidy will apply them as well.

--format-style=<string> -

Style for formatting code around applied fixes:

- 'none' (default) turns off formatting

- 'file' (literally 'file', not a placeholder)

uses .clang-format file in the closest parent

directory

- '{ <json> }' specifies options inline, e.g.

-format-style='{BasedOnStyle: llvm, IndentWidth: 8}'

- 'llvm', 'google', 'webkit', 'mozilla'

See clang-format documentation for the up-to-date information about formatting styles and options. This option overrides the 'FormatStyle` option in .clang-tidy file, if any.

--header-filter=<string> -

Regular expression matching the names of the headers to output diagnostics from. Diagnostics from the main file of each translation unit are always displayed. Can be used together with -line-filter. This option overrides the 'HeaderFilterRegex' option in .clang-tidy file, if any.

--line-filter=<string> -

List of files with line ranges to filter the warnings. Can be used together with -header-filter. The format of the list is a JSON array of objects:

[

{"name":"file1.cpp","lines":[[1,3],[5,7]]}, {"name":"file2.h"}

]

--list-checks -

List all enabled checks and exit. Use with -checks=* to list all available checks.

-p=<string> - Build path

--quiet -

Run clang-tidy in quiet mode. This suppresses printing statistics about ignored warnings and warnings treated as errors if the respective options are specified.

--store-check-profile=<prefix> -

By default reports are printed in tabulated format to stderr. When this option is passed, these per-TU profiles are instead stored as JSON.

--system-headers - Display the errors from system headers.

--use-color -

Use colors in diagnostics. If not set, colors will be used if the terminal connected to standard output supports colors. This option overrides the 'UseColor' option in .clang-tidy file, if any.

--vfsoverlay=<filename> -

Overlay the virtual filesystem described by file over the real file system.

--warnings-as-errors=<string> -

Upgrades warnings to errors. Same format as '-checks'. This option's value is appended to the value of the 'WarningsAsErrors' option in .clang-tidy file, if any.

-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: https://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.

Configuration files:

clang-tidy attempts to read configuration for each source file from a .clang-tidy file located in the closest parent directory of the source file. If InheritParentConfig is true in a config file, the configuration file in the parent directory (if any exists) will be taken and current config file will be applied on top of the parent one. If any configuration options have a corresponding command-line option, command-line option takes precedence. The effective configuration can be inspected using -dump-config:

$ clang-tidy -dump-config

---

Checks:

'-*,some-check'

WarningsAsErrors:

''

HeaderFilterRegex:

''

FormatStyle:

none

InheritParentConfig: true User: user CheckOptions:

- key:

some-check.SomeOption

value:

'some value'

...