Initial version of merge function.

util/lib/puppet/parser/functions/merge.rb

@@ -0,0 +1,20 @@
+module Puppet::Parser::Functions
+    newfunction(:merge, :type => :rvalue) do |args|
+
+        if args.length < 2
+            raise Puppet::ParseError, ("merge(): wrong number of arguments (#{args.length}; must be at least 2)")
+        end
+
+        ret = []
+        args.each do |arg|
+            next if arg == ""
+            if arg.is_a?(Array)
+                ret.concat(arg)
+            else
+                ret.concat([arg])
+            end
+        end
+        ret
+
+    end
+end