1 files changed, 28 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/empty.rb b/lib/puppet/parser/functions/empty.rb
new file mode 100644
index 0000000..80ebb86
--- /dev/null
+++ b/lib/puppet/parser/functions/empty.rb
@@ -0,0 +1,28 @@
+#
+# empty.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:empty, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable is empty.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "empty(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, Hash, String].include?(klass)
+      raise(Puppet::ParseError, 'empty(): Requires either ' +
+        'array, hash or string to work with')
+    end
+
+    result = value.empty?
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :