Extra Clang Tools 19.0.0git (In-Progress) Release Notes

Written by the LLVM Team


These are in-progress notes for the upcoming Extra Clang Tools 19 release. Release notes for previous releases can be found on the Download Page.


This document contains the release notes for the Extra Clang Tools, part of the Clang release 19.0.0git. Here we describe the status of the Extra Clang Tools in some detail, including major improvements from the previous release and new feature work. All LLVM releases may be downloaded from the LLVM releases web site.

For more information about Clang or LLVM, including information about the latest release, please see the Clang Web Site or the LLVM Web Site.

Note that if you are reading this file from a Git checkout or the main Clang web page, this document applies to the next release, not the current one. To see the release notes for a specific release, please see the releases page.

What’s New in Extra Clang Tools 19.0.0git?

Some of the major new features and improvements to Extra Clang Tools are listed here. Generic improvements to Extra Clang Tools as a whole or to its underlying infrastructure are described first, followed by tool-specific sections.

Major New Features

Improvements to clangd

Inlay hints


Semantic Highlighting

Compile flags


Code completion

Code actions

Signature help




Improvements to clang-doc

Improvements to clang-query

The improvements are…

Improvements to clang-rename

The improvements are…

Improvements to clang-tidy

  • Improved run-clang-tidy.py script. Added argument -source-filter to filter source files from the compilation database, via a RegEx. In a similar fashion to what -header-filter does for header files.

  • Improved check_clang_tidy.py script. Added argument -export-fixes to aid in clang-tidy and test development.

New checks

New check aliases

Changes in existing checks

Removed checks

  • Removed cert-dcl21-cpp, which was deprecated since clang-tidy 17, since the rule DCL21-CPP has been removed from the CERT guidelines.


  • Fixed incorrect formatting in clang-apply-replacements when no --format option is specified. Now clang-apply-replacements applies formatting only with the option.

  • Fixed the linuxkernel-must-check-errs documentation to consistently use the check’s proper name.

Improvements to include-fixer

The improvements are…

Improvements to clang-include-fixer

The improvements are…

Improvements to modularize

The improvements are…

Improvements to pp-trace

Clang-tidy Visual Studio plugin