Smart pointer and utility changes related to adding checked_delere and checked_array_delete

[SVN r10189]

scoped_ptr_example.hpp

@@ -0,0 +1,21 @@
+//  Boost scoped_ptr_example header file  ------------------------------------//
+
+#include <boost/smart_ptr.hpp>
+
+//  The point of this example is to prove that even though
+//  example::implementation is an incomplete type in translation units using
+//  this header, scoped_ptr< implementation > is still valid because the type
+//  is complete where it counts - in the inplementation translation unit where
+//  destruction is actually instantiated.
+
+class example : boost::noncopyable
+{
+ public:
+  example();
+  ~example();
+  void do_something();
+ private:
+  class implementation;
+  boost::scoped_ptr< implementation > _imp; // hide implementation details
+};
+