Returning a value as a class doesnt set the fields

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

value be member of MyClass

Actual Behaviour

value is not a member

Reproduction steps

local function myConstructor()
	---@class MyClass
	return { value = true }
end

local o = myConstructor()
print(o.value)

Additional Notes

This should also work with a setmetatable variant:

---@class MyClass
local MyClass = {}
MyClass.__index = MyClass

local function myConstructor()
	---@class MyClass
	return setmetatable({ value = true }, MyClass)
end

local o = myConstructor()
print(o.value)

It does work with this workarround:

local function myConstructor()
	---@class MyClass
	local o = setmetatable({ value = true }, MyClass)
	return o
end

Log File

No response

首先重現 issue 中的兩個建構函式範例，並追蹤 language server 如何解讀回傳 table 上的 @class 註解。將其與使用區域變數的可行 workaround 進行比較，並加入一個涵蓋直接回傳和透過 setmetatable 回傳的回歸測試。在型別檢查期間，value 被辨識為 MyClass 的成員即表示完成。