1 files changed, 33 insertions, 0 deletions
diff --git a/puppet/modules/stdlib/lib/puppet/parser/functions/validate_array.rb b/puppet/modules/stdlib/lib/puppet/parser/functions/validate_array.rb
new file mode 100644
index 00000000..34b51182
--- /dev/null
+++ b/puppet/modules/stdlib/lib/puppet/parser/functions/validate_array.rb
@@ -0,0 +1,33 @@
+module Puppet::Parser::Functions
+
+  newfunction(:validate_array, :doc => <<-'ENDHEREDOC') do |args|
+    Validate that all passed values are array data structures. Abort catalog
+    compilation if any value fails this check.
+
+    The following values will pass:
+
+        $my_array = [ 'one', 'two' ]
+        validate_array($my_array)
+
+    The following values will fail, causing compilation to abort:
+
+        validate_array(true)
+        validate_array('some_string')
+        $undefined = undef
+        validate_array($undefined)
+
+    ENDHEREDOC
+
+    unless args.length > 0 then
+      raise Puppet::ParseError, ("validate_array(): wrong number of arguments (#{args.length}; must be > 0)")
+    end
+
+    args.each do |arg|
+      unless arg.is_a?(Array)
+        raise Puppet::ParseError, ("#{arg.inspect} is not an Array.  It looks to be a #{arg.class}")
+      end
+    end
+
+  end
+
+end