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