1 files changed, 18 insertions, 0 deletions
diff --git a/lib/rdoc.rb b/lib/rdoc.rb
index 0d2dc26764..25989189ad 100644
--- a/lib/rdoc.rb
+++ b/lib/rdoc.rb
@@ -4,6 +4,13 @@
 module RDoc
 
   ##
+  # Exception thrown by any rdoc error.
+
+  class Error < RuntimeError; end
+
+  RDocError = Error # :nodoc:
+
+  ##
   # RDoc version you are using
 
   VERSION = "2.0.0"
@@ -14,5 +21,16 @@ module RDoc
 
   DOT_DOC_FILENAME = ".document"
 
+  GENERAL_MODIFIERS = %w[nodoc].freeze
+
+  CLASS_MODIFIERS = GENERAL_MODIFIERS
+
+  ATTR_MODIFIERS  = GENERAL_MODIFIERS
+
+  CONSTANT_MODIFIERS = GENERAL_MODIFIERS
+
+  METHOD_MODIFIERS = GENERAL_MODIFIERS +
+    %w[arg args yield yields notnew not-new not_new doc]
+
 end