debug.getproto Synchronous

getproto

Get one nested Luau prototype from a function. Use the default ProtoProxy for metadata or prototype hooks; request active closures when you need actual live functions.

Syntax

Luau

debug.getproto(
    target: DebugTarget,
    index: number,
    active: boolean?
) -> ProtoProxy OR {Function}

Parameters

Function parameters
Parameter	Type	Description
`target`	`DebugTarget`	A Luau function, visible stack level, or ProtoProxy. Indexes in these APIs start at 1.
`index`	`number`	One-based nested prototype slot.
`active`	`boolean?`	Optional boolean. true searches for active closures made from that prototype.

Argument fields

DebugTarget fields

Luau

DebugTarget = Function | number | ProtoProxy

Returns

ProtoProxy OR {Function}

A ProtoProxy by default; with active=true, an array of matching live functions.

Usage notes

An active search can return an empty array if no matching closure is live.

Example

Luau

local function factory()
    return function() return "inside" end
end
local nested = debug.getproto(factory, 1)
print(debug.getinfo(nested).source)