New NL Rule suggestion: Place comment-only lines before the code they apply to about cppcoreguidelines HOT 1 OPEN

Also, while the CppCoreGuidelines examples generally prefer in-line comments [...]

The nature of comments detailing on some specific code aspect in examples differs from "regular" comments you may find in actual production code. In the guidelines, for example, you may often find inline comments telling you whether a compiler is expected to accept a specific line or not, often including a reason in the latter case. So you cannot necessarily conclude what comments should look like in production code from these example snippets.

from cppcoreguidelines.