generic

[RomanSpector]

---[Documentation](https://www.wowace.com/projects/libstub)
LibStub = {}

---@generic T
---@param major `T`
---@param minor number
---@return T library
function LibStub:NewLibrary(major, minor) end

---@generic T
---@param major `T`
---@param silent? boolean
---@return T library
function LibStub:GetLibrary(major, silent) end

first file

local lib = LibStub:NewLibrary("major", 1);


lib.table = {}
lib.number = 1;
lib.string = {}

function lib:func() end

second file

local lib = LibStub:GetLibrary("major", 1);

[sewbacca]

I encountered this issue too, however, as far as I understand, generic return values, are considered objects and not classes, thus any added fields, won't propagate back to the classes prototype. At least for the language server.
It would be great, if one could add classes implicitly, I don't know however, how hard this is to implement.
Here is a workarround: Just add ---@class major above the LibStub:NewLibrary() call

---@class major
local lib = LibStub:NewLibrary("major", 1);


lib.table = {}
lib.number = 1;
lib.string = {}

function lib:func() end

Now, anywhere, where is LibStub:GetLibrary("major", 1); called, you will get the completion info.

P.S. A more precise issue title would be beneficial, e.g. "Generically created classes, won't work"

Edit: A probably related issue: #1161

[sumneko]

You must use ---@class to declare the structure of the class to avoid accidental injection of fields (and provide correct warnings in the future)