module Puppet::Parser::Functions

  newfunction(
  :split, :type => :rvalue,

    :doc => "\
Split a string variable into an array using the specified split regexp.

  Usage:

    $string     = 'v1.v2:v3.v4'
    $array_var1 = split($string, ':')
    $array_var2 = split($string, '[.]')
    $array_var3 = split($string, '[.:]')

$array_var1 now holds the result ['v1.v2', 'v3.v4'],
while $array_var2 holds ['v1', 'v2:v3', 'v4'], and
$array_var3 holds ['v1', 'v2', 'v3', 'v4'].

Note that in the second example, we split on a string that contains
a regexp meta-character (.), and that needs protection.  A simple
way to do that for a single character is to enclose it in square
brackets.") do |args|

  raise Puppet::ParseError, ("split(): wrong number of arguments (#{args.length}; must be 2)") if args.length != 2

  return args[0].split(Regexp.compile(args[1]))
  end
end