Missing contextual information when hovering over extension type declarations

[incendial]

Consider the following example:

extension type ET(Future<void> value) implements Future<void> {}

class SomeClass implements String {
  const SomeClass();
}

enum SomeEnum { first }

both enum and class have contextual info when hovering over their name (e.g. that it's a class and implements String):

for extension types this tooltip has only the name:

Please complete the following information:

Dart Code extension: 3.82.0

App: Visual Studio Code
App Host: desktop
Version: mac 1.86.2

Workspace type: Dart (LSP)

Dart (3.3.0): /Users/incendial/Desktop/flutter/bin/cache/dart-sdk
Flutter (3.19.1): /Users/incendial/Desktop/flutter (No device)

[incendial]

Also noticed that for cmd + hover extension types have a bit confusing constructor (without the extension type name)

It gets a bit worse for named constructors

When classes, for example, have the name

Is it by design or you'd want this to be fixed?

[incendial]

The example above is not for declaration, but for instantiation:

void fn() {
  ET.named();
  SomeClass();
}

[incendial]

And if the extension type is const, this info is not displayed (but for a class it's there):

extension type const ET.named(Future<void> value) implements Future<void> {}

[DanTup]

Fixed by dart-lang/sdk@8a62f4a, but ships in an SDK release.

[DanTup]

Oops, I missed some of the extra things noted above, I need to check if the fix covered them too.

[DanTup]

@incendial do you have a complete code sample to trigger the bad preview on the named constructor of an extension type?

I can reproduce the issue for unnamed constructors:

And I understand the cause of this (which seems specific to the default constructor), however I can't reproduce for named constructors:

[incendial]

extension type ET.named(Future<void> value) implements Future<void> {}

void fn() {
  ET.named();
}