1 files changed, 22 insertions, 0 deletions
diff --git a/lib/rdoc/markup/attr_changer.rb b/lib/rdoc/markup/attr_changer.rb
new file mode 100644
index 0000000000..1772f18b2b
--- /dev/null
+++ b/lib/rdoc/markup/attr_changer.rb
@@ -0,0 +1,22 @@
+class RDoc::Markup
+
+  AttrChanger = Struct.new :turn_on, :turn_off # :nodoc:
+
+end
+
+##
+# An AttrChanger records a change in attributes. It contains a bitmap of the
+# attributes to turn on, and a bitmap of those to turn off.
+
+class RDoc::Markup::AttrChanger
+
+  def to_s # :nodoc:
+    "Attr: +#{turn_on}/-#{turn_off}"
+  end
+
+  def inspect # :nodoc:
+    '+%d/-%d' % [turn_on, turn_off]
+  end
+
+end
+