Apply #356: Add Node.astext() as an abstract super method.

Patch by Takeshi KOMIYA.

git-svn-id: http://svn.code.sf.net/p/docutils/code/trunk@8246 929543f6-e4f2-0310-98a6-ba3bd3dd1d04

1 files changed, 5 insertions, 1 deletions

diff --git a/docutils/docutils/nodes.py b/docutils/docutils/nodes.py
index 9265717ea..dcaa667bd 100644
--- a/docutils/docutils/nodes.py
+++ b/docutils/docutils/nodes.py
@@ -91,6 +91,10 @@ class Node(object):
         """Return a deep copy of self (also copying children)."""
         raise NotImplementedError
 
+    def astext(self):
+        """Return a string representation of this Node."""
+        raise NotImplementedError
+
     def setup_child(self, child):
         child.parent = self
         if self.document:
@@ -390,7 +394,7 @@ class Text(Node, reprunicode):
 
     def rstrip(self, chars=None):
         return self.__class__(reprunicode.rstrip(self, chars), self.rawsource)
-    
+
     def lstrip(self, chars=None):
         return self.__class__(reprunicode.lstrip(self, chars), self.rawsource)