NAME

       clangd - manual page for clangd 18

DESCRIPTION

       OVERVIEW: clangd is a language server that provides IDE-like features to editors.

   It  should  be  used  via an editor plugin rather than invoked directly. For more information,
       see:
              https://clangd.llvm.org/ https://microsoft.github.io/language-server-protocol/

       clangd accepts flags on the commandline, and in the CLANGD_FLAGS environment variable.

       USAGE: clangd [options]

       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

       clangd compilation flags options:

       --compile-commands-dir=<string>     - Specify a path to look for compile_commands.json. If
              path is invalid, clangd will look in the current directory and parent paths of each
              source file

       --query-driver=<string>              -  Comma  separated  list  of globs for white-listing
              gcc-compatible drivers that are safe to execute.  Drivers  matching  any  of  these
              globs     will     be     used     to     extract     system     includes.     e.g.
              /usr/bin/**/clang-*,/path/to/repo/**/g++-*

       clangd feature options:

       --all-scopes-completion             - If set to true, code completion will  include  index
              symbols  that are not defined in the scopes (e.g. namespaces) visible from the code
              completion point. Such completions can insert scope qualifiers

       --background-index                  - Index project code in  the  background  and  persist
              index on disk.

       --background-index-priority=<value>  -  Thread priority for building the background index.
              The effect of this flag is OS-specific.

       =background
              -   Minimum priority, runs on idle CPUs. May leave 'performance' cores unused.

       =low   -   Reduced priority compared to interactive work.

       =normal
              -   Same priority as other clangd work.

       --clang-tidy                        - Enable clang-tidy diagnostics

       --completion-style=<value>          - Granularity of code completion suggestions

       =detailed
              -   One completion item for each semantically distinct completion, with  full  type
              information

       =bundled
              -     Similar  completion  items  (e.g.  function  overloads)  are  combined.  Type
              information shown where possible

       --fallback-style=<string>           - clang-format style  to  apply  by  default  when  no
              .clang-format file is found

       --function-arg-placeholders          - When disabled, completions contain only parentheses
              for function calls. When enabled, completions also contain placeholders for  method
              parameters

       --header-insertion=<value>            -   Add  #include  directives  when  accepting  code
              completions

       =iwyu  -   Include what you use. Insert the owning header for  top-level  symbols,  unless
              the header is already directly included or the symbol is forward-declared

       =never -   Never insert #include directives as part of code completion

       --header-insertion-decorators         -  Prepend  a  circular  dot  or  space  before  the
              completion label, depending on whether an include line will be inserted or not

       --import-insertions                  -  If  header  insertion  is  enabled,  add   #import
              directives when accepting code completions or fixing includes in Objective-C code

       --limit-references=<int>            - Limit the number of references returned by clangd. 0
              means no limit (default=1000)

       --limit-results=<int>               - Limit the number of results returned  by  clangd.  0
              means no limit (default=100)

       --project-root=<string>                -    Path    to    the   project   root.   Requires
              remote-index-address to be set.

       --remote-index-address=<string>     - Address of the remote index server

       --rename-file-limit=<int>           - Limit the number of files to be affected  by  symbol
              renaming. 0 means no limit (default=50)

       clangd miscellaneous options:

       --check[=<string>]                    - Parse one file in isolation instead of acting as a
              language server. Useful to investigate/reproduce crashes or configuration problems.
              With --check=<filename>, attempts to parse a particular file.

       --enable-config                     - Read user and project configuration from YAML files.

              Project config is from a .clangd file in the project  directory.   User  config  is
              from clangd/config.yaml in the following directories:

       Windows: %USERPROFILE%\AppData\Local
              Mac OS: ~/Library/Preferences/ Others: $XDG_CONFIG_HOME, usually ~/.config

              Configuration is documented at https://clangd.llvm.org/config.html

       -j  <uint>                            - Number of async workers used by clangd. Background
              index also uses this many workers.

       --malloc-trim                       - Release memory periodically via malloc_trim(3).

       --pch-storage=<value>               - Storing PCHs in memory increases memory usages,  but
              may improve performance

       =disk  -   store PCHs on disk

       =memory
              -   store PCHs in memory

       clangd protocol and logging options:

       --log=<value>                       - Verbosity of log messages written to stderr

       =error
              -   Error messages only

       =info  -   High level execution tracing

       =verbose
              -   Low level details

       --offset-encoding=<value>             -   Force  the  offsetEncoding  used  for  character
              positions. This bypasses negotiation via client capabilities

       =utf-8
              -   Offsets are in UTF-8 bytes

       =utf-16
              -   Offsets are in UTF-16 code units

       =utf-32
              -   Offsets are in unicode codepoints

       --path-mappings=<string>            - Translates between client paths (as seen by a remote
              editor) and server paths (where clangd sees files on disk). Comma separated list of
              '<client_path>=<server_path>' pairs, the first entry matching a given path is used.
              e.g. /home/project/incl=/opt/include,/home/project=/workarea/project

       --pretty                            - Pretty-print JSON output