getupvalues - Real Function Reference

getupvalues(target: function | number): table

Aliases

debug.getupvalues

Arguments

function | number

required

Lua function or stack level whose upvalues are returned.

Returns

table

One-based array table containing the function upvalues. Empty when none are present.

ตัวอย่าง

Read all upvalues from a Lua closure or stack level.

local first = "one"
local second = "two"

local function target()
    return first, second
end

local upvalues = getupvalues(target)

for index, value in ipairs(upvalues) do
    print(index, value)
end

print(#debug.getupvalues(target))