Reexports docs are ignored

[HectorMRC]

rust-analyzer version: 0.3.2345-standalone (b0632f7 2025-03-16)

rustc version: rustc 1.86.0-nightly (ae5de6c75 2025-01-29)

editor or extension: VSCode

code snippet to reproduce:

// bar/src/lib.rs

pub struct Bar;

// foo/src/lib.rs

/// Documentation for this reexport.
#[doc(inline)]
pub use bar::Bar;

When putting the cursor over a reexported type, VSCode does not show the docs from the reexport.
In the example above, when using the reexported Bar type from foo, VSCode does not display Documentation for this reexport. as part of the Bar documentation.
Instead it would only show the documentation set for Bar at the bar crate, if any.

[ChayimFriedman2]

This is quite problematic, because for e.g.:

// bar/src/lib.rs

pub struct Bar;

// foo/src/lib.rs
/// Documentation for this reexport.
#[doc(inline)]
pub use bar::Bar;

// baz/src/lib.rs
use foo::Bar;

fn foo() -> Bar { ... }

When hovering over the return type of foo(), we have no way to tell the reexport it came from. All we know is the use in baz and the original definition. And I think it'll be quite confusing if we would show it only when hovering over the direct reexport.

[Veykril]

Duplicate of #14079

[Veykril]

But yes, as far as types are concerned, after lowering into type-ir any association will be gone. That part is a wont-fix