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