Function assigned to field should be completed as function

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?

Completion

Expected Behaviour

When providing an alias for a function in a table, the alias should be treated as a function.

Actual Behaviour

When providing an alias for a function in a table, the alias is treated as a field and does not get completed as a function. Hover shows that the field is a function, but completion does not agree or complete with parentheses.

Reproduction steps

1. Use the below code

---@class myTable
local t = {}

---Does a thing
---@param a integer
---@param b string
---@param c boolean
function t.myFunc(a, b, c) end
t.myAlias = t.myFunc

2. Try to get completions for the function t.myAlias

Additional Notes

This would be incredibly useful for aliasing a function — something that luassert does a lot.

Log File

No response

使用提供的 t.myFunc 和 t.myAlias 範例在 LuaLS Visual Studio Code 擴充功能中重現此問題，然後追蹤別名的補全與型別資訊處理。完成的標準是：t.myAlias 在補全中被辨識為函式、提供括號，並且與 hover 顯示的函式型別一致。