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-rw-r--r--lib/puppet/parser/functions/empty.rb28
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 :