Why can't the rust-analyzer allow apply `#[doc(alias = ...)]` to items in enums?

help
1

I want to apply #[doc(alias = ...)] to items in enums, the grammar allowed it but I can't input EnumName:: to look out the alias of a item. Why? The version of analyzer is 0.4.2987, it is because too old to show the alias?

2

Please open an issue at rust-lang/rust-analyzer.