Display function return type for auto completion suggestions

[BuggStream]

Currently I mainly use CLion with the Rust plugin when programming in Rust, but every now and then I try out Rust Analyzer. One thing that is holding me back from switching is the fact that CLion shows the return type of functions:

This is how the auto complete suggestions look like using Rust Analyzer:

As far as I am aware it is not possible to display the return types with Rust Analyzer, so it'd be amazing if this feature could be added.

[unexge]

Rust Analyzer actually adds return type to detail but seems like it is shortened, there is a VSCode issue for that (also includes some css hacks to expand completion box): microsoft/vscode#29757. You can also expand detail box by clicking icon at the end of line

[matklad]

How does VS Code output looks for other languages (TypeScript, Dart and C++ are probalby worth checking out)?

[matklad]

Will be handled in #7565.