Breadcrumbs support

[pravic]

The latest VSCode version has introduced breadcrumbs support, which is a quite good addition to navigation experience.

Unfortunately, in Rust it works only with files and does not support symbol hierarchy (e.g. file -> impl -> method).

[Xanewok]

IIUC this needs the hierarchical symbol outline response from the RLS; with that, the VSCode should automatically populate the breadcrumbs UI.

[pravic]

@Xanewok But the "Goto symbol in file by category" command (@:) works fine. Do breadcrumbs require a different way of populating symbols?

[Xanewok]

IIUC they need a hierarchical information, which we don’t provide yet

[sjwo]

Is this the relevant issue on the RLS side?

rust-lang/rls#909

[pravic]

Most likely. Anyway, RustAnalyzer supports this.

[sjwo]

Most likely. Anyway, RustAnalyzer supports this.

Thank you!

For others looking for this: simply switching the engine from rls to rust-analyzer in the settings for the vscode-rust extension will not currently make breadcrumbs work. Instead, disable or uninstall the vscode-rust extension, and install the matklad.rust-analyzer extension; a reload will be required. More installation info here.