Feature or enhancement

Proposal:

While I was implementing #119976, I observed that some macros are not guarded against possible constructions because their content is only wrapped in {} but not in the classical do { ... } while(0) construction.

For instance, the current VISIT macro sometimes requires the semi-colon and sometimes not depending on how it is used, which I find a bit confusing. I think it's preferrable to always require to add the ;.

Has this already been discussed elsewhere?

No response given

Links to previous discussion of this feature:

No response

Linked PRs

• gh-119981: use do { ... } while(0) in some multi-line macros #119982