Improvements to clang-tidy¶

• The checks profiling info can now be stored as JSON files for futher post-processing and analysis.

• New module abseil for checks related to the Abseil library.

• New module portability.

• New module zircon for checks related to Fuchsia’s Zircon kernel.

• New abseil-string-find-startswith check.

  Checks whether a std::string::find() result is compared with 0, and suggests replacing with absl::StartsWith().

• New android-comparison-in-temp-failure-retry check.

  Diagnoses comparisons that appear to be incorrectly placed in the argument to the TEMP_FAILURE_RETRY macro.

• New bugprone-exception-escape check

  Finds functions which may throw an exception directly or indirectly, but they should not.

• New bugprone-parent-virtual-call check.

  Detects and fixes calls to grand-…parent virtual methods instead of calls to overridden parent’s virtual methods.

• New bugprone-terminating-continue check

  Checks if a continue statement terminates the loop.

• New bugprone-throw-keyword-missing check.

  Diagnoses when a temporary object that appears to be an exception is constructed but not thrown.

• New bugprone-unused-return-value check.

  Warns on unused function return values.

• New cert-msc32-c check

  Detects inappropriate seeding of srand() function.

• New cert-msc51-cpp check

  Detects inappropriate seeding of C++ random generators and C srand() function.

• New cppcoreguidelines-avoid-goto check.

  The usage of goto for control flow is error prone and should be replaced with looping constructs. Every backward jump is rejected. Forward jumps are only allowed in nested loops.

• New cppcoreguidelines-narrowing-conversions check

  Checks for narrowing conversions, e.g. int i = 0; i += 0.1;.

• New fuchsia-multiple-inheritance check.

  Warns if a class inherits from multiple classes that are not pure virtual.

• New fuchsia-restrict-system-includes check

  Checks for allowed system includes and suggests removal of any others.

• New fuchsia-statically-constructed-objects check

  Warns if global, non-trivial objects with static storage are constructed, unless the object is statically initialized with a constexpr constructor or has no explicit constructor.

• New fuchsia-trailing-return check.

  Functions that have trailing returns are disallowed, except for those using decltype specifiers and lambda with otherwise unutterable return types.

• New hicpp-multiway-paths-covered check.

  Checks on switch and if - else if constructs that do not cover all possible code paths.

• New modernize-use-uncaught-exceptions check.

  Finds and replaces deprecated uses of std::uncaught_exception to std::uncaught_exceptions.

• New portability-simd-intrinsics check.

  Warns or suggests alternatives if SIMD intrinsics are used which can be replaced by std::experimental::simd operations.

• New readability-simplify-subscript-expr check.

  Simplifies subscript expressions like s.data()[i] into s[i].

• New zircon-temporary-objects check.

  Warns on construction of specific temporary objects in the Zircon kernel.

• Added the missing bitwise assignment operations to hicpp-signed-bitwise.

• New option MinTypeNameLength for modernize-use-auto check to limit the minimal length of type names to be replaced with auto. Use to skip replacing short type names like int/bool with auto. Default value is 5 which means replace types with the name length >= 5 letters only (ex. double, unsigned).

• Add VariableThreshold option to readability-function-size check.

  Flags functions that have more than a specified number of variables declared in the body.

• The AnalyzeTemporaryDtors option was removed, since the corresponding cfg-temporary-dtors option of the Static Analyzer now defaults to true.

• New alias fuchsia-header-anon-namespaces to google-build-namespaces added.

• New alias hicpp-avoid-goto to cppcoreguidelines-avoid-goto added.

• Removed the google-readability-redundant-smartptr-get alias of the readability-redundant-smartptr-get check.

• The ‘misc-forwarding-reference-overload’ check was renamed to bugprone-forwarding-reference-overload

• The ‘misc-incorrect-roundings’ check was renamed to bugprone-incorrect-roundings

• The ‘misc-lambda-function-name’ check was renamed to bugprone-lambda-function-name

• The ‘misc-macro-parentheses’ check was renamed to bugprone-macro-parentheses

• The ‘misc-macro-repeated-side-effects’ check was renamed to bugprone-macro-repeated-side-effects

• The ‘misc-misplaced-widening-cast’ check was renamed to bugprone-misplaced-widening-cast

• The ‘misc-sizeof-container’ check was renamed to bugprone-sizeof-container

• The ‘misc-sizeof-expression’ check was renamed to bugprone-sizeof-expression

• The ‘misc-string-compare’ check was renamed to readability-string-compare

• The ‘misc-string-integer-assignment’ check was renamed to bugprone-string-integer-assignment

• The ‘misc-string-literal-with-embedded-nul’ check was renamed to bugprone-string-literal-with-embedded-nul

• The ‘misc-suspicious-enum-usage’ check was renamed to bugprone-suspicious-enum-usage

• The ‘misc-suspicious-missing-comma’ check was renamed to bugprone-suspicious-missing-comma

• The ‘misc-suspicious-semicolon’ check was renamed to bugprone-suspicious-semicolon

• The ‘misc-suspicious-string-compare’ check was renamed to bugprone-suspicious-string-compare

• The ‘misc-swapped-arguments’ check was renamed to bugprone-swapped-arguments

• The ‘misc-undelegated-constructor’ check was renamed to bugprone-undelegated-constructor

• The ‘misc-unused-raii’ check was renamed to bugprone-unused-raii

• The ‘google-runtime-member-string-references’ check was removed.