fpcall - full pcall (available in lua and luau)

fpcall.lua

local function fpcall(f, success, err, ...)
	local Results = {pcall(f, ...)}
	local Success = table.remove(Results, 1)
	if Success then
		success(table.unpack(Results))
	else
		err(table.unpack(Results))
	end
	return
end

fpcall.luau

local function fpcall(f: (...any) -> (...any), success: (...any) -> (), err: (errmessage: string) -> (), ... : any)
	local Results = {pcall(f, ...)}
	local Success = table.remove(Results, 1)
	if Success then
		success(table.unpack(Results))
	else
		err(table.unpack(Results))
	end
	return
end