How to seperate crate name from qualname?

[Xanewok]

Originally created by @jendrikw (rust-dev-tools/rls-analysis#136):

In src/lowering.rs#L275 crate_name and qualname are concatenated. This creates very interesting results for the qualname, for example:

• std<f64>::cbrt
• libc::unix::::readdir (not sure if this one belong here)
• core<char>::is_lowercase
• alloc<[T]>::into_vec

Why is this done and how are you supposed to get the crate name form this?

[Xanewok]

Originally replied by @nrc (rust-dev-tools/rls-analysis#136 (comment)):

qualname can be pretty buggy, I don't think the RLS uses it for anything. We should probably track all the bugs. And with the changes to imports happening in the 2018 edition, we will probably need to change some things anyway.

The first token in the qualname should be the crate name (up to ::) and where it isn't that is a bug, but as you've noticed there are a lot of bugs :-(

[Xanewok]

Originally replied by @jendrikw (rust-dev-tools/rls-analysis#136 (comment)):

Is there another way besides qualname to get the type of a function?

[Xanewok]

Originally replied by @nrc (rust-dev-tools/rls-analysis#136 (comment)):

I think the value field has it