--- /dev/null
+#
+# swapcase.rb
+#
+
+module Puppet::Parser::Functions
+ newfunction(:swapcase, :type => :rvalue, :doc => <<-EOS
+This function will swap the existing case of a string.
+
+*Examples:*
+
+ swapcase("aBcD")
+
+Would result in: "AbCd"
+ EOS
+ ) do |arguments|
+
+ raise(Puppet::ParseError, "swapcase(): Wrong number of arguments " +
+ "given (#{arguments.size} for 1)") if arguments.size < 1
+
+ value = arguments[0]
+
+ unless value.is_a?(Array) || value.is_a?(String)
+ raise(Puppet::ParseError, 'swapcase(): Requires either ' +
+ 'array or string to work with')
+ end
+
+ if value.is_a?(Array)
+ # Numbers in Puppet are often string-encoded which is troublesome ...
+ result = value.collect { |i| i.is_a?(String) ? i.swapcase : i }
+ else
+ result = value.swapcase
+ end
+
+ return result
+ end
+end
+
+# vim: set ts=2 sw=2 et :