getupvalues

Returns all upvalues from a Lua function or stack level as a one-based array table. Invalid stack levels raise “Level out of range”, and non-Lua functions raise “Lua function expected”. debug.getupvalues is an alias.

Sintaks

getupvalues(target: function | number): table

Alias

debug.getupvalues

Argumen

Name	Type	Required	Deskripsi
`target`	`function \| number`	Yes	Lua function or stack level whose upvalues are returned.

Return

Name	Type	Deskripsi
`upvalues`	`table`	One-based array table containing the function upvalues. Empty when none are present.

Contoh

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))

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