Support for generic classes

[K4rakara]

Describe the bug
Despite being mentioned in luanalysis, generic classes are not supported by this language server.

Screenshots

Environment:

• OS: Arch Linux
• Client: VSCode

[carsakiller]

Just some test cases:

---@class Array<T>: { [integer]: T }

---@type Array<string>
local arr = {}

-- correctly warns that I am assigning a boolean to a string
arr[1] = false

-- no warning despite indexing with a string instead of an integer
arr["foo"] = "bar"

-- correctly does not warn as I am following the type correctly
arr[3] = "Correct"

---@class Dictionary<T>: { [string]: T }

---@type Dictionary<boolean>
local dict = {}

-- no warning despite indexing with a number
dict[1] = "incorrect"

-- no warning despite assigning a string
dict["foo"] = "bar?"

-- correctly does not warn as I am following the type correctly
dict["correct"] = true

[GiuseppeIII]

Ran into this today as well 😞.

[b0o]

Any update on this? This feature would be amazing!

[A1steaksa]

This has cropped up as an issue that's making modularity difficult. Would love to see it fixed.