debug.getconstants

C closures are not supported

This function will throw an error if called on a C closure, such as print, since C closures have no accessible constants.

debug.getconstants returns a list of all constants used within a Luau function's bytecode. This includes literal values like numbers, strings, booleans, and nil.

function debug.getconstants(func: (...any) -> (...any) | number): { number | string | boolean | nil }

Parameters

Parameter	Description
func	The Lua function (or stack level) whose constants will be returned.

---

Examples

Example 1

local function dummy_function()
    local dummy_string = "foo bar"
    string.split(dummy_string, " ")
end

local constants = debug.getconstants(dummy_function)
for constant_index, constant in constants do
    print(`[{constant_index}]: {constant}`)
end

-- Output:
-- [1]: "string"
-- [2]: "split"
-- [4]: "foo bar"
-- [5]: " "

Example 2

print(debug.getconstants(print)) -- Should error due to being a C closure