//

 // 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_SCOPED_DELETER_HPP

 #define BOOST_PTR_CONTAINER_SCOPED_DELETER_HPP

 #if defined(_MSC_VER) && (_MSC_VER >= 1200)

 # pragma once

 #endif

 #include <iterator>

 #include <cstddef>

 #include <boost/scoped_array.hpp>

 namespace boost

 {

     namespace ptr_container_detail

     {

         template< class T, class CloneAllocator >

         class scoped_deleter

         {

             typedef std::size_t size_type;

             scoped_array<T*>  ptrs_;

             size_type         stored_; 

             bool              released_;

         public:

             scoped_deleter( size_type size ) : 

                 ptrs_( new T*[size] ), stored_( 0 ), 

                 released_( false )

             {

                 BOOST_ASSERT( size > 0 );

             }

             scoped_deleter( size_type n, const T& x ) // strong

                 : ptrs_( new T*[n] ), stored_(0),

                   released_( false )

             {

                 for( size_type i = 0; i != n; i++ )

                     add( CloneAllocator::allocate_clone( &x ) );

                 BOOST_ASSERT( stored_ > 0 );

             }

             template< class InputIterator >

             scoped_deleter ( InputIterator first, InputIterator last  ) // strong

                 : ptrs_( new T*[ std::distance(first,last) ] ),

                   stored_(0),

                   released_( false )

             {

                 for( ; first != last; ++first )

                     add( CloneAllocator::allocate_clone_from_iterator( first ) );

                 BOOST_ASSERT( stored_ > 0 );

             }

             ~scoped_deleter()

             {

                 if ( !released_ )

                 {

                     for( size_type i = 0u; i != stored_; ++i )

                         CloneAllocator::deallocate_clone( ptrs_[i] ); 

                 }

             }

             void add( T* t )

             {

                 BOOST_ASSERT( ptrs_.get() != 0 );

                 ptrs_[stored_] = t;

                 ++stored_;

             }

             void release()

             {

                 released_ = true;

             }

             T** begin()

             {

                 BOOST_ASSERT( ptrs_.get() != 0 );

                 return &ptrs_[0];

             }

             T** end()

             {

                 BOOST_ASSERT( ptrs_.get() != 0 );

                 return &ptrs_[stored_];

             }

         }; // class 'scoped_deleter'

     }

 }

 #endif