classmatch
Prototype: classmatch(regex)
Return type: class
Description: Tests whether regex matches any currently set class.
Returns true if the regular expression matches any currently defined class, otherwise returns false.
Arguments:
regex: Regular expression, in the range.*
A regular expression matched against the current list of set classes. The regular expression must match a complete class for the expression to be true (i.e. the regex is anchored).
Example:
    body common control
    {
      bundlesequence  => { "example" };
    }
    bundle agent example
    {     
      classes:
        "do_it" and => { classmatch(".*_cfengine_com"), "linux" }; 
      reports:
        do_it::
          "Host matches pattern";
    }
