--- /dev/null
+module Puppet::Parser::Functions
+
+ newfunction(:validate_array, :doc => <<-'ENDHEREDOC') do |args|
+ Validate that all passed values are array data structures. Abort catalog
+ compilation if any value fails this check.
+
+ The following values will pass:
+
+ $my_array = [ 'one', 'two' ]
+ validate_array($my_array)
+
+ The following values will fail, causing compilation to abort:
+
+ validate_array(true)
+ validate_array('some_string')
+ $undefined = undef
+ validate_array($undefined)
+
+ ENDHEREDOC
+
+ unless args.length > 0 then
+ raise Puppet::ParseError, ("validate_array(): wrong number of arguments (#{args.length}; must be > 0)")
+ end
+
+ args.each do |arg|
+ unless arg.is_a?(Array)
+ raise Puppet::ParseError, ("#{arg.inspect} is not an Array. It looks to be a #{arg.class}")
+ end
+ end
+
+ end
+
+end