Unable to access original regex from Puppet HostClass

gistfile1.rb

[1] pry(main)> require 'puppet'
=> true
[2] pry(main)> Puppet[:code] = "node /^foo\.\d{2}\.bar$/ {}"
=> "node /^foo.d{2}.bar$/ {}"
[3] pry(main)> node = Puppet::Node::Environment.new(Puppet[:environment]).known_resource_types.nodes.first
=> ["foo.d2.bar",
 #<Puppet::Resource::Type:0x7f6fcc5f5fd0
  @arguments={},
  @doc="",
  @line=1,
  @name=/^foo.d{2}.bar$/,
  @namespace="",
  @resource_type_collection=
   TypeCollection{:hostclasses=>[], :definitions=>[], :nodes=>["foo.d2.bar"]},
  @type=:node>]
[4] pry(main)> node.last.name
=> "foo.d2.bar"

node.last.instance_var_get(:@name)