regexp backrefences in node

hyphen_node.pp

[vagrant@glitched sample_pp]$ FACTER_fqdn=des-bwq0t01 puppet apply ./hyphen_node.pp
Notice: Scope(Node[__node_regexp__des-bweqs0-9t0-9]): matched des-bwq
Notice: Compiled catalog for glitched.vmlocal in environment production in 0.30 seconds
Notice: Applied catalog in 0.01 seconds
[vagrant@glitched sample_pp]$ cat hyphen_node.pp

node /(des-bw[eqs])[0-9]t[0-9]+/ {
   notice("matched $1")
}

node default {
   notice("nope")
}