#i122208# avoid default assignment operator of recursive STL containers

support for recursive STL containers is not required by the standard.
Boost TR1 containers allow them explicitly though but for some compiler/stl
combinations there are constness issues that prevent the default
assignment operator to work. Adding a small helper function solves
this problem in a clean way.

configmgr/source/partial.cxx

@@ -98,7 +98,7 @@ Partial::Partial(
             rtl::OUString seg;
             bool end = parseSegment(*i, &n, &seg);
             if (end) {
-                p->children[seg] = Node();
+                p->children[seg].clear();
                 break;
             }
             Node::Children::iterator j(p->children.find(seg));

configmgr/source/partial.hxx

@@ -26,14 +26,13 @@
 
 #include "sal/config.h"
 
-#include <map>
+#include <boost/unordered_map.hpp> // using the boost container because it explicitly allows recursive types
 #include <set>
 
 #include "boost/noncopyable.hpp"
 
 #include "path.hxx"
-
-namespace rtl { class OUString; }
+#include "rtl/ustring.hxx"
 
 namespace configmgr {
 
@@ -51,9 +50,10 @@ public:
 
 private:
     struct Node {
-        typedef std::map< rtl::OUString, Node > Children;
+        typedef boost::unordered_map< rtl::OUString, Node > Children;
 
         Node(): startInclude(false) {}
+        void clear() { startInclude=false; children.clear(); }
 
         Children children;
         bool startInclude;