`rust-analyzer` fails to resolve/auto-complete constants of associated types.

rust-analyzer fails to resolve/auto-complete constants of associated types.

What was I doing?

I wanted to have multiple associated constants on a type (implemented by a proc macro), but I wanted them grouped/nested together under another associated type.

Basically I wanted something like MyType::CONSTS::MY_CONST (instead of adding them directly on the type like MyType::CONST_1, MyType::CONST_2, MyType::CONST_3, and so on).

What was my issue?

I can do <MyType as MyConstTrait>::CONSTS::MY_CONST and my code will compile and run properly, but none of the constants are suggested.

The only auto-complete suggestions are into, try_into, from, and try_from.

See below for full (minimal) implementation.

rust-analyzer version: 0.4.2262-standalone

rustc version: rustc 1.84.0-nightly (b91a3a056 2024-11-07)

editor or extension: I have the same issue using rust-analyzer on both VSCode and Neovim

relevant settings: N/A

repository link (if public, optional): (eg. rust-analyzer)

code snippet to reproduce:

pub struct Person {
    age: i32,
    name: String,
    alive: bool,
}

trait FieldPaths {
    type T;
}

impl FieldPaths for Person {
    type T = PersonPaths;
}

pub struct PersonPaths;

impl PersonPaths {
    pub const AGE: &'static str = "age";
    pub const NAME: &'static str = "name";
    pub const ALIVE: &'static str = "alive";
}

fn main() {
    // I get no intelli-sense to complete AGE, but it does compile
    let age = <Person as FieldPaths>::T::AGE;
    println!("{age}");

    // Still no intelli-sense to complete AGE, but still compiles
    type PATH = <Person as FieldPaths>::T;
    let age = PATH::AGE;
    println!("{age}");
}

Start with the minimal Rust reproduction in the issue and investigate rust-analyzer's completion handling for associated types and their constants. Reproduce the missing suggestions in VSCode or Neovim; done means AGE, NAME, and ALIVE are offered for ::T and the PATH alias.