puppetlabs-stdlib/lib/puppet/parser/functions/is_string.rb

#
# is_string.rb
#

module Puppet::Parser::Functions
  newfunction(:is_string, :type => :rvalue, :doc => <<-EOS
Returns true if the variable passed to this function is a string.
    EOS
  ) do |arguments|

    raise(Puppet::ParseError, "is_string(): Wrong number of arguments " +
      "given (#{arguments.size} for 1)") if arguments.size < 1

    type = arguments[0]

    result = type.is_a?(String)

    if result and (type == type.to_f.to_s or type == type.to_i.to_s) then
      return false
    end

    return result
  end
end

# vim: set ts=2 sw=2 et :