Chris@16: //
Chris@16: // Boost.Pointer Container
Chris@16: //
Chris@16: //  Copyright Thorsten Ottosen 2003-2005. Use, modification and
Chris@16: //  distribution is subject to the Boost Software License, Version
Chris@16: //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: // For more information, see http://www.boost.org/libs/ptr_container/
Chris@16: //
Chris@16: 
Chris@16: #ifndef BOOST_PTR_CONTAINER_CLONE_ALLOCATOR_HPP
Chris@16: #define BOOST_PTR_CONTAINER_CLONE_ALLOCATOR_HPP
Chris@16: 
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/checked_delete.hpp>
Chris@16: #include <typeinfo>
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16:     /////////////////////////////////////////////////////////////////////////
Chris@16:     // Clonable concept 
Chris@16:     /////////////////////////////////////////////////////////////////////////
Chris@16:     
Chris@16:     template< class T >
Chris@16:     inline T* new_clone( const T& r )
Chris@16:     {
Chris@16:         //
Chris@16:         // @remark: if you get a compile-error here,
Chris@16:         //          it is most likely because you did not
Chris@16:         //          define new_clone( const T& ) in the namespace
Chris@16:         //          of T.
Chris@16:         //
Chris@16:         T* res = new T( r );
Chris@16:         BOOST_ASSERT( typeid(r) == typeid(*res) &&
Chris@16:                       "Default new_clone() sliced object!" );
Chris@16:         return res;
Chris@16:     }
Chris@16: 
Chris@16:     template< class T >
Chris@16:     inline T* new_clone( const T* r )
Chris@16:     {
Chris@16:         return r ? new_clone( *r ) : 0;
Chris@16:     }
Chris@16: 
Chris@16:     // 
Chris@16:     // @remark: to make new_clone() work
Chris@16:     //          with scope_ptr/shared_ptr ect.
Chris@16:     //          simply overload for those types
Chris@16:     //          in the appropriate namespace.
Chris@16:     // 
Chris@16:     
Chris@16:     template< class T >
Chris@16:     inline void delete_clone( const T* r )
Chris@16:     {
Chris@16:         checked_delete( r );
Chris@16:     }
Chris@16: 
Chris@16:     /////////////////////////////////////////////////////////////////////////
Chris@16:     // CloneAllocator concept
Chris@16:     /////////////////////////////////////////////////////////////////////////
Chris@16:     
Chris@16:     struct heap_clone_allocator
Chris@16:     {
Chris@16:         template< class U >
Chris@16:         static U* allocate_clone( const U& r )
Chris@16:         {
Chris@16:             return new_clone( r );
Chris@16:         }
Chris@16: 
Chris@16:         template< class U >
Chris@16:         static void deallocate_clone( const U* r )
Chris@16:         {
Chris@16:             delete_clone( r );
Chris@16:         }
Chris@16: 
Chris@16:     };
Chris@16: 
Chris@16: 
Chris@16:     
Chris@16:     struct view_clone_allocator
Chris@16:     {
Chris@16:         template< class U >
Chris@16:         static U* allocate_clone( const U& r )
Chris@16:         {
Chris@16:             return const_cast<U*>(&r);
Chris@16:         }
Chris@16: 
Chris@16:         template< class U >
Chris@16:         static void deallocate_clone( const U* /*r*/ )
Chris@16:         {
Chris@16:             // do nothing
Chris@16:         }
Chris@16:     };
Chris@16: 
Chris@16: } // namespace 'boost'
Chris@16: 
Chris@16: #endif
Chris@16: