Fix tracebacks occurring for duplicate C++ domain objects.

CHANGES

@@ -1,6 +1,8 @@
 Release 1.0.7 (in development)
 ==============================
 
+* Fix tracebacks occurring for duplicate C++ domain objects.
+
 
 Release 1.0.6 (Jan 04, 2011)
 ============================

sphinx/domains/cpp.py

@@ -161,7 +161,7 @@ class DefExpr(object):
         return unicode(self).encode('utf-8')
 
     def __repr__(self):
-        return '<defexpr %s>' % self
+        return '<%s %s>' % (self.__class__.__name__, self)
 
 
 class PrimaryDefExpr(DefExpr):
@@ -818,6 +818,7 @@ class CPPObject(ObjectDescription):
     def add_target_and_index(self, sigobj, sig, signode):
         theid = sigobj.get_id()
         name = unicode(sigobj.name)
+        if theid not in self.state.document.ids:
             signode['names'].append(theid)
             signode['ids'].append(theid)
             signode['first'] = (not self.names)

tests/root/objects.txt

@@ -161,3 +161,14 @@ User markup
 
 
 Referencing :userdescrole:`myobj`.
+
+
+CPP domain
+==========
+
+.. cpp:class:: n::Array<T,d>
+
+   .. cpp:function:: T& operator[]( unsigned j )
+
+   .. cpp:function:: const T& operator[]( unsigned j ) const
+