Globally set variable type by its name

[macanton]

Is it possible to set globally variable type by name?
For example, set that the user variable is always an instance of the User class?

[castwide]

If you want it to be truly global, you could define it with a @!method directive in the Kernel module. Example:

module Kernel
  # @!method user
  #   @return [User]
end

user # recognized here

class Example
  user # and here

  def foo
    user # and here
  end

  def self.bar
    user # and here
  end
end