`implement` and `interface` macros will soon be on `stable`

[kennykerr]

Eric Holk (@eholk) recently completed the work to stabilize the const_fn_fn_ptr_basics and const_fn_trait_bound Rust features:

rust-lang/rust#93827

These features will become stable as of Rust 1.61. These features are required by the windows crate's implement and interface macros. If you use these macros with an earlier version of Rust, you will need to use a nightly compiler.

[mwcampbell]

Just to make sure I understand correctly, is it a known issue right now that the "implement" feature in the current version of windows-rs requires a nightly toolchain? If so, do you know what the timeframe for resolving this is? In the meantime, we can keep using a previous version of windows-rs.

[kennykerr]

That's right, stabilization has now been approved. I think this means it should show up in the next stable release.

[eholk]

Once the PR merges, which should be soon, the features will become stable in 1.61. It's technically two stable releases away since 1.60 is in beta right now.

[kennykerr]

#1591 removed these features. Now we just need 1.61 to be released, but there is no more work for the windows crate so I'm closing this issue.

[kennykerr]

This is now published as part of 0.34.0.

[harryjph]

FAQ.md needs to be updated to reflect that nightly is no longer required.