- Encourage single line nested namespace declarations.
- Reference and allow `constinit` in the relevant sections
- Update operator overloading guidance for comparison operators: prefer
only to overload `==` and optionally `<=>` when there is an obvious
ordering, and allow the compiler to derive the other comparison
operators.
- Discourage prefixing `uint32_t`, et cetera with `std::`.
- Document when and how to use concepts:
- Use `requires` expressions rather than the alternatives, e.g. a
template parameter.
- Do not reimplement existing concepts/traits.
- Do not expose concepts across API boundaries.
- Do not use concepts unnecessarily.
- Do not implement concepts that are not compile-time checkable.
- Update caveats for `thread_local` usage, particularly around the risk
of destruction order issues.
- Provide explicit guidance for situations where `bit_cast` may be a
better fit than `reinterpret_cast`.
- Emphasize that kConstant-style naming can still be used for `const`
automatic variables that are initialized at runtime, but only if the
resulting variable has the same value with each evaluation (i.e. it
does not depend on runtime inputs).
- Clarify what sorts of details belong in file-level comments vs
comments for individual abstractions.
- Update TODO examples to reflect the preferred styling, from most
preferred to least preferred.
This relaxes the guidance around indenting by 4 additional spaces and provides the Prettier format as one of the examples to ensure the style guide is compatible with the Prettier formatter.
- Encourage use of the `internal` namespace to document parts of an API
that are not public.
- Create a separate section for `switch` statements.
- Require a project-specific prefix for macros.
- Reorganize guidance for formatting conditional statements.
- Other miscellaneous wording and formatting fixes.
pylint triggered:
pylint: Command line or configuration file:1: UserWarning: Specifying exception names in the overgeneral-exceptions option without module name is deprecated and support for it will be removed in pylint 3.0. Use fully qualified name (maybe 'builtins.StandardError' ?) instead.
pylint: Command line or configuration file:1: UserWarning: Specifying exception names in the overgeneral-exceptions option without module name is deprecated and support for it will be removed in pylint 3.0. Use fully qualified name (maybe 'builtins.Exception' ?) instead.
pylint: Command line or configuration file:1: UserWarning: Specifying exception names in the overgeneral-exceptions option without module name is deprecated and support for it will be removed in pylint 3.0. Use fully qualified name (maybe 'builtins.BaseException' ?) instead.
Suggestion works out.
There is no Common Lisp operator named PRINT-UNPRINTABLE-OBJECT. Given the context, it is certain that PRINT-UNREADABLE-OBJECT (www.lispworks.com/documentation/lw51/CLHS/Body/m_pr_unr.htm) was meant instead.
- Include friend types in class declaration order guidance.
- Include previously omitted text (due to mismatched tags) about
preferring int16_t over short, et cetera.
- Function declarations:
- Updated guidance for what comments should cover.
- Add a C++ attribute example.
This recommendation was relaxed in the internal style guide a few months ago. The suggestion is still to continue using alphabetical order unless teams have access to the appropriate tooling which can support consistently automating and enforcing different sorting rules which may be more logical to read.
