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

首先复现 issue 中的两个构造函数示例，并跟踪 language server 如何解释返回表上的 @class 注解。将其与使用局部变量的可行 workaround 进行比较，并添加一个涵盖直接返回和通过 setmetatable 返回的回归测试。在类型检查期间，value 被识别为 MyClass 的成员即表示完成。