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Ipv6Addr::is_documentation should be expanded to include RFC 9637's 3ffff::/20 #137821
Description
The unstable Ipv6Addr::is_documentation (#27709) is documented, matching the implementation, as
Returns true if this is an address reserved for documentation (
2001:db8::/32).This property is defined in IETF RFC 3849.
However, RFC 9637 from Aug 2024 added 3fff::/20 as a documentation space as well, and thus this API should be updated.
This does mean two programs may disagree on whether an address is_documentation based on which version of the stdlib they use…but I think that's inevitable with anything based on IETF standards. (In some cases it might make sense to explicitly pin the library to an earlier version of the standard, but I don't think that's necessary here.)
Activity
the8472 commentedon Mar 1, 2025
Even if that were a concern (I don't think it is), the feature is unstable so we're free to change it anyway.
fgsch commentedon Jun 3, 2025
I was just looking at this myself and it seems this was implemented in #135741.
jrose-signal commentedon Jun 3, 2025
That's what I get for only looking at the stable source in the rustdocs…hooray!