More changes for Boost 1.45

[SVN r64984]

example/doc_function_hooks.cpp

@@ -0,0 +1,76 @@
+/////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2010-2010
+//
+// Distributed under the Boost Software License, Version 1.0.
+//    (See accompanying file LICENSE_1_0.txt or copy at
+//          http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/intrusive for documentation.
+//
+/////////////////////////////////////////////////////////////////////////////
+#include <boost/intrusive/detail/config_begin.hpp>
+//[doc_function_hooks
+#include <boost/intrusive/list.hpp>
+#include <boost/intrusive/parent_from_member.hpp>
+
+using namespace boost::intrusive;
+
+struct MyClass
+{
+   int dummy;
+   //This internal type has a member hook
+   struct InnerNode
+   {
+      int dummy;
+      list_member_hook<> hook;
+   } inner;
+};
+
+//This functor converts between MyClass and InnerNode's member hook
+struct Functor
+{
+   //Required types
+   typedef list_member_hook<>    hook_type;
+   typedef hook_type*            hook_ptr;
+   typedef const hook_type*      const_hook_ptr;
+   typedef MyClass               value_type;
+   typedef value_type*           pointer;
+   typedef const value_type*     const_pointer;
+
+   //Required static functions
+   static hook_ptr to_hook_ptr (value_type &value)
+      {  return &value.inner.hook; }
+   static const_hook_ptr to_hook_ptr(const value_type &value)
+      {  return &value.inner.hook; }
+   static pointer to_value_ptr(hook_ptr n)
+   {
+      return get_parent_from_member<MyClass>
+         (get_parent_from_member<MyClass::InnerNode>(n, &MyClass::InnerNode::hook)
+         ,&MyClass::inner
+      );
+   }
+   static const_pointer to_value_ptr(const_hook_ptr n)
+   {
+      return get_parent_from_member<MyClass>
+         (get_parent_from_member<MyClass::InnerNode>(n, &MyClass::InnerNode::hook)
+         ,&MyClass::inner
+      );
+   }
+};
+
+//Define a list that will use the hook accessed through the function object
+typedef list< MyClass, function_hook< Functor> >  List;
+
+int main()
+{
+   MyClass n;
+   List l;
+   //Insert the node in both lists
+   l.insert(l.begin(), n);
+   assert(l.size() == 1);
+   return 0;
+}
+//]
+
+#include <boost/intrusive/detail/config_end.hpp>