Custom Types: Events

[WaffIe_Cake]

Is there a way to declare custom types for event firing?
Ex):

local Event = Instance.new("BindableEvent")
Event.Event:Connect(function(a, b, c) --Custom types should show type of each parameter
	...	
end)
Event:Fire(1, "string", Enum.KeyCode.X) 

[VSCPlays]

Please explain more so I can help you properly

also about that, if you want custom types, please use type checking like this function(bp:BasePart) or do this:

type name = string

function(v:name)
   print(`your name is {v}`)
end

[WaffIe_Cake]

An example of what I mean pops up when using services such as the RunService

local RunSer = game:GetService("RunService")

--Roblox explicitly shows the parameters of t and dt to be numbers: "Connect(func(time: number, deltaTime: number) -> ()): RBXScriptConnection"
RunSer.Stepped:Connect:(function(t: number, dt: number)  <==
...
end)

Is there a way to do something similar with bindable events?

[majdTRM]

If you want it to apply to the Instance and have it work across scripts without manual casting, unfortunately not. But, if you have no problem with adding :: MyEvent whenever you reference this event (e.g. you could place it at the top and use :: MyEvent to make it easier), you could go with this:

type MyEvent = BindableEvent & { Event: { Fire: (number, string, number) -> string } }

local myEvent: MyEvent = script.Parent.Event.Or.Something.Like.That

MyEvent.Event:Fire(1,"a",2)