2 files changed, 23 insertions, 1 deletions
diff --git a/lib/puppet/parser/functions/is_bool.rb b/lib/puppet/parser/functions/is_bool.rb
new file mode 100644
index 0000000..8bbdbc8
--- /dev/null
+++ b/lib/puppet/parser/functions/is_bool.rb
@@ -0,0 +1,22 @@
+#
+# is_bool.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:is_bool, :type => :rvalue, :doc => <<-EOS
+Returns true if the variable passed to this function is a boolean.
+    EOS
+  ) do |arguments|
+
+    raise(Puppet::ParseError, "is_bool(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size != 1
+
+    type = arguments[0]
+
+    result = type.is_a?(TrueClass) || type.is_a?(FalseClass)
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :
diff --git a/lib/puppet/parser/functions/validate_bool.rb b/lib/puppet/parser/functions/validate_bool.rb
index 62c1d88..59a0805 100644
--- a/lib/puppet/parser/functions/validate_bool.rb
+++ b/lib/puppet/parser/functions/validate_bool.rb
@@ -24,7 +24,7 @@ module Puppet::Parser::Functions
     end
 
     args.each do |arg|
-      unless (arg.is_a?(TrueClass) || arg.is_a?(FalseClass))
+      unless function_is_bool([arg])
         raise Puppet::ParseError, ("#{arg.inspect} is not a boolean.  It looks to be a #{arg.class}")
       end
     end