100 lines
2.4 KiB
C++
100 lines
2.4 KiB
C++
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//
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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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