Class generics produce unusable and wrong union types

透過在安裝了 lua-language-server 的 VS Code 中分析 Lua 程式碼片段來重現問題，重點關注 Stack.New 以及 Peek、Pop 和 Push 方法的補全提示。將 a、b 和 c 的推斷型別與預期的非聯集型別方法提示進行比較；當這些方法不再顯示無法使用或不必要的聯集型別，也不再顯示多餘的泛型佔位符時，即表示完成。

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

MacOS, Windows

What is the issue affecting?

Completion

Expected Behaviour

Methods Peek,Push,Pop have proper type hints

Actual Behaviour

While types of a, b, c are correct the
type hints of methods are unusable with unnecessary union types.

If Push is removed from superclass, then type hints go to normal without unions but still with <T> in many places

local _lua_setmetatable = setmetatable

Stack = {}

--- @generic T
--- @class Stack<T> : {
---     Pop: (fun(self: Stack<T>): T),
---     Peek: (fun(self: Stack<T>): T),
---     Push: (fun(self: Stack<T>, value: T): Stack<T>),
--- }
--- @field protected _stack any[]
--- @field protected _count integer
Stack.__index = {}

--- Creates a new, empty stack.
--- @generic T
--- @return Stack<T>
function Stack.New()
    local this = {
        _stack = {},
        _count = 0,
    }

    return _lua_setmetatable(this, Stack)
end






local st = Stack.New() --[[@as Stack<{ num: integer }>]]

local a = st:Peek()
local b = st:Pop()
local c = st:Push({})

Reproduction steps

Analyze specified code in VSCode with luals installed

Additional Notes

No response

Log File

No response