Just had a look at this. It's one of the few that doesn't use jsx-like macros, an major anti-feature in my opinion. The jsx stuff looks fancy, but it completely breaks Rust Analyzer. You might not care about code completion, but good luck resolving the complex type+lifetime issues (that UIs in Rust often have) without hover type.
Kudos for showing scope discipline, that's one I will be keeping an eye on.
That's not inherent of macros, but how the parser of the macro body is written. Ideally, the jsx code would be transformed to correct Rust code even on broken input, then Rust Analyzer would map the tokens from the expansion to the tokens from the source code to have context for IDE features (rename, autocompletion, go to definition, etc).
I wrote some stuff [1]. It's a bit all over the place since I'm very bad at writing. Here's also a thread with Rust Analyzer's developers [2]
[1]: https://blog.emi0x7d1.dev/improving-autocompletion-in-your-r... [2]: https://www.reddit.com/r/rust/comments/16x2kzi/improving_aut...