Extra Clang Tools 12.0.0 (In-Progress) Release Notes¶

Introduction
What’s New in Extra Clang Tools 12.0.0?

Written by the LLVM Team

Warning

These are in-progress notes for the upcoming Extra Clang Tools 12 release. Release notes for previous releases can be found on the Download Page.

Introduction ¶

This document contains the release notes for the Extra Clang Tools, part of the Clang release 12.0.0. 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 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.

The IgnoreImplicitCastsAndParentheses traversal mode has been removed.

Improvements to clang-rename ¶

The improvements are…

Improvements to clang-tidy ¶

Checks that allow configuring names of headers to include now support wrapping the include in angle brackets to create a system include. For example, cppcoreguidelines-init-variables and modernize-make-unique.

New modules ¶

New altera module.

Includes checks related to OpenCL for FPGA coding guidelines, based on the Altera SDK for OpenCL: Best Practices Guide.
New concurrency module.

Includes checks related to concurrent programming (e.g. threads, fibers, coroutines, etc.).

New checks ¶

New altera-kernel-name-restriction check.

Finds kernel files and include directives whose filename is kernel.cl, Verilog.cl, or VHDL.cl.
New altera-struct-pack-align check.

Finds structs that are inefficiently packed or aligned, and recommends packing and/or aligning of said structs as needed.
New cppcoreguidelines-prefer-member-initializer check.

Finds member initializations in the constructor body which can be placed into the initialization list instead.
New bugprone-misplaced-pointer-arithmetic-in-alloc check.
New bugprone-redundant-branch-condition check.

Finds condition variables in nested if statements that were also checked in the outer if statement and were not changed.
New concurrency-mt-unsafe check.

Finds thread-unsafe functions usage. Currently knows about POSIX and Glibc function sets.
New bugprone-signal-handler check.

Finds functions registered as signal handlers that call non asynchronous-safe functions.
New cert-sig30-c check.

Alias to the bugprone-signal-handler check.
New readability-function-cognitive-complexity check.

Flags functions with Cognitive Complexity metric exceeding the configured limit.

Changes in existing checks ¶

Improved modernize-loop-convert check.

Now able to transform iterator loops using rbegin and rend methods.
Improved readability-identifier-naming check.

Added an option GetConfigPerFile to support including files which use different naming styles.

Now renames overridden virtual methods if the method they override has a style violation.

Added support for specifying the style of scoped enum constants. If unspecified, will fall back to the style for regular enum constants.

Added an option IgnoredRegexp per identifier type to suppress identifier naming checks for names matching a regular expression.
Removed google-runtime-references check because the rule it checks does not exist in the Google Style Guide anymore.
Improved readability-redundant-string-init check.

Added std::basic_string_view to default list of string-like types.

Extra Clang Tools 12 documentation