--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/modules/stdlib/lib/puppet/parser/functions/is_integer.rb	Sat Aug 16 19:47:38 2014 +0000
@@ -0,0 +1,27 @@
+#
+# is_integer.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_integer, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable returned to this string is an integer.
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "is_integer(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+
+    value = arguments[0]
+
+    if value != value.to_i.to_s and !value.is_a? Fixnum then
+      return false
+    else
+      return true
+    end
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :