Show hint for generic type parameter

[just-ero]

Summary

Show a hint for generic parameters.

Background and Motivation

Hints for method parameters exist. A similar hint for generic parameters would be helpful.

Proposed Feature

Take the following example code:

/// <typeparam name="T">Param documentation.</typeparam>
class C<T> where T : class;

When using the class by typing C<, a hint along these lines would be helpful:

(generic parameter) class T
  Param documentation.

[CyrusNajmabadi]

This already exists:

[CyrusNajmabadi]

Moving to VSCode as customer reports it only reproes there.

[just-ero]

Some more detail: the parameter hint appears once a comma is inserted (C<,) and remains when it is subsequently removed.

I would like to additionally suggest to please auto-complete both parts of the angled brackets (typing C< becomes C<>).