error_chain's Result<T> support

When using the error_chain crate it’s common to define the errors in a “errors.rs” mod and import them where needed with use errors::*.

This overrides the default Result<T,E> enum with a Result<T>, and intellij-rust reports all the functions using it as errors (Wrong number of arguments: expected 2, found 1 [E0243]).

I know it’s hard to parse macros (see #955), but I was wondering if there is a way to use annotations to declare the definition of enums, structs or functions (like // @defines Result<T> or similar) to use in the mod defining them, so that the parser recognizes them.

P.S.: sorry for the empty bug report earlier, I don’t know what I pressed to post it while writing… 😃

[matklad]

Make E0243 an inspection instead of annotation, so it could be opted out.

Yeah, we definitely should do this with perhaps most of the errors: combination of macros and shadowing leads to false positives 😦

Special casing error_chain! would be a nice addition!

[FauxFaux]

I’ve been using this as a workaround, if anyone else is interested:

https://github.com/FauxFaux/error-chain-for-dumb-ides#error-chain-for-dumb-ides