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Class generics cannot inherit directly from the generic #2645

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Description

@SReject

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Annotations, Type Checking

Expected Behaviour

When defining a generic class, the class should be able to inherit directly from the generic, allowing an extension of the generic

---@class Example<T>: T
---@field thing boolean

Actual Behaviour

Lua diagnostics reports "undefined class `T`"

Reproduction steps

Copy the following into VSCode

---@class Example<T>: T

Hover over the second T

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