Moved smart_ptr contents to subdirectories, switched to a local test/Jamfile.

[SVN r17042]

example/shared_ptr_example2.hpp

@@ -0,0 +1,26 @@
+//  Boost shared_ptr_example2 header file  -----------------------------------//
+
+#include <boost/shared_ptr.hpp>
+
+//  This example demonstrates the handle/body idiom (also called pimpl and
+//  several other names).  It separates the interface (in this header file)
+//  from the implementation (in shared_ptr_example2.cpp).
+
+//  Note that even though example::implementation is an incomplete type in
+//  some translation units using this header, shared_ptr< implementation >
+//  is still valid because the type is complete where it counts - in the
+//  shared_ptr_example2.cpp translation unit where functions requiring a
+//  complete type are actually instantiated.
+
+class example
+{
+ public:
+  example();
+  example( const example & );
+  example & operator=( const example & );
+  void do_something();
+ private:
+  class implementation;
+  boost::shared_ptr< implementation > _imp; // hide implementation details
+};
+