enum_dispatch cannot be properly indexed

Environment

• IntelliJ Rust plugin version: 0.4.162.4321-212
• Rust toolchain version: nightly-2022-04-03-aarch64-apple-darwin
• IDE name and version: Clion 21.2.3
• Operating system: Darwin m1max.local 21.3.0 Darwin Kernel Version 21.3.0 arm64

Problem description

Steps to reproduce

Use enum_dispatch can’t be properly indexed.

If I use simple version enum, it can be indexed.

#[enum_dispatch(DataType)]
enum DataTypeImpl {
    Foo,
    Bar,
}

[antonok-edm]

@vlad20012 I’m the author of enum_dispatch, please let me know if there’s anything I can do to make it more IDE-friendly! In particular, if you have a list of the "imaginable rule"s, I’d be happy to look into following them. I wasn’t aware such a list existed 😅

[vlad20012]

@sundy-li It works in rust-analyzer by chance. And it doesn’t work if you start modifying a enum or a trait under enum_dispath macro. In short, rust-analyzer uses single long-living process that expands macros for all crates. IntelliJ Rust uses up to 4 processes that expands macors in parallel. Hence, enum_dispatch macro for a enum and enum_dispatch macro for a trait may fall into different processes and be expanded without knowing each other.

P.S. Don’t try fixing it from the IDE side. Such stateful macros just should not exist. In some day they will stop working even in rustc.