Extra Clang Tools 5 documentation

Extra Clang Tools 5.0.0 (In-Progress) Release Notes

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Extra Clang Tools 5.0.0 (In-Progress) Release Notes

Written by the LLVM Team


These are in-progress notes for the upcoming Extra Clang Tools 5 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 5.0.0. 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 Subversion 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 5.0.0?

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.

Improvements to clang-query

The improvements are...

Improvements to clang-rename

The improvements are...

Improvements to clang-tidy

  • New android-cloexec-creat check

    Detect usage of creat().

  • New android-cloexec-open check

    Checks if the required file flag O_CLOEXEC exists in open(), open64() and openat().

  • New android-cloexec-fopen check

    Checks if the required mode e exists in the mode argument of fopen().

  • New android-cloexec-socket check

    Checks if the required file flag SOCK_CLOEXEC is present in the argument of socket().

  • New bugprone-suspicious-memset-usage check

    Finds memset() calls with potential mistakes in their arguments. Replaces and extends the google-runtime-memset check.

  • New bugprone-undefined-memory-manipulation check

    Finds calls of memory manipulation functions memset(), memcpy() and memmove() on not TriviallyCopyable objects resulting in undefined behavior.

  • New cert-dcl21-cpp check

    Checks if the overloaded postfix operator++/-- returns a constant object.

  • New cert-dcl58-cpp check

    Finds modification of the std or posix namespace.

  • Improved cppcoreguidelines-no-malloc check

    Allow custom memory management functions to be considered as well.

  • New misc-forwarding-reference-overload check

    Finds perfect forwarding constructors that can unintentionally hide copy or move constructors.

  • New misc-lambda-function-name check

    Finds uses of __func__ or __FUNCTION__ inside lambdas.

  • New modernize-replace-random-shuffle check

    Finds and fixes usage of std::random_shuffle as the function has been removed from C++17.

  • New modernize-return-braced-init-list check

    Finds and replaces explicit calls to the constructor in a return statement by a braced initializer list so that the return type is not needlessly repeated.

  • New modernize-unary-static-assert-check check

    The check diagnoses any static_assert declaration with an empty string literal and provides a fix-it to replace the declaration with a single-argument static_assert declaration.

  • Improved modernize-use-emplace check

    Removes unnecessary std::make_pair and std::make_tuple calls in push_back calls and turns them into emplace_back. The check now also is able to remove user-defined make functions from push_back calls on containers of custom tuple-like types by providing TupleTypes and TupleMakeFunctions.

  • New modernize-use-noexcept check

    Replaces dynamic exception specifications with noexcept or a user defined macro.

  • New performance-inefficient-vector-operation check

    Finds possible inefficient vector operations in for loops that may cause unnecessary memory reallocations.

  • Added NestingThreshold to readability-function-size check

    Finds compound statements which create next nesting level after NestingThreshold and emits a warning.

  • Added ParameterThreshold to readability-function-size check

    Finds functions that have more than ParameterThreshold parameters and emits a warning.

  • New readability-misleading-indentation check

    Finds misleading indentation where braces should be introduced or the code should be reformatted.

  • Support clang-formatting of the code around applied fixes (-format-style command-line option).

  • New bugprone module

    Adds checks that target bugprone code constructs.

  • New hicpp module

    Adds checks that implement the High Integrity C++ Coding Standard and other safety standards. Many checks are aliased to other modules.

Improvements to include-fixer

The improvements are...

Improvements to modularize

The improvements are...

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