--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stdlib/lib/puppet/parser/functions/upcase.rb	Sat Aug 16 19:47:38 2014 +0000
@@ -0,0 +1,41 @@
+#
+# upcase.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:upcase, :type => :rvalue, :doc => <<-EOS
+Converts a string or an array of strings to uppercase.
+
+*Examples:*
+
+    upcase("abcd")
+
+Will return:
+
+    ASDF
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "upcase(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    value = arguments[0]
+    klass = value.class
+
+    unless [Array, String].include?(klass)
+      raise(Puppet::ParseError, 'upcase(): 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.upcase : i }
+    else
+      result = value.upcase
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :