753 lines
26 KiB
C++
753 lines
26 KiB
C++
//
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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_DETAIL_REVERSIBLE_PTR_CONTAINER_HPP
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#define BOOST_PTR_CONTAINER_DETAIL_REVERSIBLE_PTR_CONTAINER_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif
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#include <boost/ptr_container/detail/throw_exception.hpp>
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#include <boost/ptr_container/detail/scoped_deleter.hpp>
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#include <boost/ptr_container/detail/static_move_ptr.hpp>
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#include <boost/ptr_container/exception.hpp>
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#include <boost/ptr_container/clone_allocator.hpp>
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#include <boost/ptr_container/nullable.hpp>
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#ifdef BOOST_NO_SFINAE
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#else
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#include <boost/range/functions.hpp>
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#endif
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#include <boost/config.hpp>
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#include <boost/iterator/reverse_iterator.hpp>
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#include <boost/range/iterator.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/type_traits/is_pointer.hpp>
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#include <boost/type_traits/is_integral.hpp>
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#include <typeinfo>
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#include <memory>
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#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
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#pragma warning(push)
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#pragma warning(disable:4127)
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#endif
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namespace boost
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{
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namespace ptr_container_detail
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{
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template< class CloneAllocator >
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struct clone_deleter
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{
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template< class T >
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void operator()( const T* p ) const
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{
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CloneAllocator::deallocate_clone( p );
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}
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};
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template< class T >
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struct is_pointer_or_integral
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{
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BOOST_STATIC_CONSTANT(bool, value = is_pointer<T>::value || is_integral<T>::value );
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};
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struct is_pointer_or_integral_tag {};
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struct is_range_tag {};
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struct sequence_tag {};
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struct fixed_length_sequence_tag : sequence_tag {};
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struct associative_container_tag {};
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struct ordered_associative_container_tag : associative_container_tag {};
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struct unordered_associative_container_tag : associative_container_tag {};
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template
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<
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class Config,
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class CloneAllocator
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>
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class reversible_ptr_container
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{
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private:
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BOOST_STATIC_CONSTANT( bool, allow_null = Config::allow_null );
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typedef BOOST_DEDUCED_TYPENAME Config::value_type Ty_;
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template< bool allow_null_values >
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struct null_clone_allocator
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{
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template< class Iter >
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static Ty_* allocate_clone_from_iterator( Iter i )
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{
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return allocate_clone( Config::get_const_pointer( i ) );
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}
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static Ty_* allocate_clone( const Ty_* x )
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{
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if( allow_null_values )
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{
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if( x == 0 )
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return 0;
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}
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else
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{
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BOOST_ASSERT( x != 0 && "Cannot insert clone of null!" );
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}
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Ty_* res = CloneAllocator::allocate_clone( *x );
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BOOST_ASSERT( typeid(*res) == typeid(*x) &&
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"CloneAllocator::allocate_clone() does not clone the "
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"object properly. Check that new_clone() is implemented"
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" correctly" );
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return res;
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}
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static void deallocate_clone( const Ty_* x )
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{
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if( allow_null_values )
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{
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if( x == 0 )
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return;
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}
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CloneAllocator::deallocate_clone( x );
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}
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};
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typedef BOOST_DEDUCED_TYPENAME Config::void_container_type Cont;
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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typedef null_clone_allocator<reversible_ptr_container::allow_null>
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null_cloner_type;
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#else
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typedef null_clone_allocator<allow_null> null_cloner_type;
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#endif
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typedef clone_deleter<null_cloner_type> Deleter;
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Cont c_;
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public:
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Cont& base() { return c_; }
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protected: // having this public could break encapsulation
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const Cont& base() const { return c_; }
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public: // typedefs
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typedef Ty_* value_type;
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typedef Ty_* pointer;
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typedef Ty_& reference;
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typedef const Ty_& const_reference;
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typedef BOOST_DEDUCED_TYPENAME Config::iterator
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iterator;
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typedef BOOST_DEDUCED_TYPENAME Config::const_iterator
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const_iterator;
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typedef boost::reverse_iterator< iterator >
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reverse_iterator;
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typedef boost::reverse_iterator< const_iterator >
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const_reverse_iterator;
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typedef BOOST_DEDUCED_TYPENAME Cont::difference_type
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difference_type;
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typedef BOOST_DEDUCED_TYPENAME Cont::size_type
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size_type;
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typedef BOOST_DEDUCED_TYPENAME Config::allocator_type
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allocator_type;
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typedef CloneAllocator clone_allocator_type;
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typedef ptr_container_detail::static_move_ptr<Ty_,Deleter>
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auto_type;
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protected:
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typedef ptr_container_detail::scoped_deleter<Ty_,null_cloner_type>
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scoped_deleter;
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typedef BOOST_DEDUCED_TYPENAME Cont::iterator
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ptr_iterator;
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typedef BOOST_DEDUCED_TYPENAME Cont::const_iterator
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ptr_const_iterator;
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private:
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template< class InputIterator >
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void copy( InputIterator first, InputIterator last )
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{
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std::copy( first, last, begin() );
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}
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void copy( const reversible_ptr_container& r )
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{
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copy( r.begin(), r.end() );
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}
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void copy_clones_and_release( scoped_deleter& sd ) // nothrow
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{
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BOOST_ASSERT( size_type( std::distance( sd.begin(), sd.end() ) ) == c_.size() );
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std::copy( sd.begin(), sd.end(), c_.begin() );
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sd.release();
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}
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template< class ForwardIterator >
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void clone_assign( ForwardIterator first,
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ForwardIterator last ) // strong
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{
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BOOST_ASSERT( first != last );
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scoped_deleter sd( first, last ); // strong
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copy_clones_and_release( sd ); // nothrow
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}
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template< class ForwardIterator >
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void clone_back_insert( ForwardIterator first,
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ForwardIterator last )
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{
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BOOST_ASSERT( first != last );
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scoped_deleter sd( first, last );
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insert_clones_and_release( sd, end() );
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}
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void remove_all()
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{
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remove( begin(), end() );
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}
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protected:
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void insert_clones_and_release( scoped_deleter& sd,
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iterator where ) // strong
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{
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//
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// 'c_.insert' always provides the strong guarantee for T* elements
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// since a copy constructor of a pointer cannot throw
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//
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c_.insert( where.base(),
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sd.begin(), sd.end() );
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sd.release();
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}
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void insert_clones_and_release( scoped_deleter& sd ) // strong
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{
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c_.insert( sd.begin(), sd.end() );
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sd.release();
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}
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template< class U >
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void remove( U* ptr )
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{
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null_policy_deallocate_clone( ptr );
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}
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template< class I >
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void remove( I i )
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{
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null_policy_deallocate_clone( Config::get_const_pointer(i) );
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}
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template< class I >
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void remove( I first, I last )
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{
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for( ; first != last; ++first )
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remove( first );
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}
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static void enforce_null_policy( const Ty_* x, const char* msg )
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{
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if( !allow_null )
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{
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BOOST_PTR_CONTAINER_THROW_EXCEPTION( 0 == x && "null not allowed",
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bad_pointer, msg );
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}
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}
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static Ty_* null_policy_allocate_clone( const Ty_* x )
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{
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return null_cloner_type::allocate_clone( x );
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}
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static void null_policy_deallocate_clone( const Ty_* x )
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{
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null_cloner_type::deallocate_clone( x );
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}
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private:
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template< class ForwardIterator >
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ForwardIterator advance( ForwardIterator begin, size_type n )
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{
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ForwardIterator iter = begin;
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std::advance( iter, n );
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return iter;
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}
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template< class I >
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void constructor_impl( I first, I last, std::input_iterator_tag ) // basic
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{
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while( first != last )
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{
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insert( end(), null_cloner_type::allocate_clone_from_iterator(first) );
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++first;
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}
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}
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template< class I >
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void constructor_impl( I first, I last, std::forward_iterator_tag ) // strong
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{
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if( first == last )
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return;
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clone_back_insert( first, last );
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}
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template< class I >
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void associative_constructor_impl( I first, I last ) // strong
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{
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if( first == last )
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return;
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scoped_deleter sd( first, last );
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insert_clones_and_release( sd );
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}
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public: // foundation! should be protected!
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reversible_ptr_container()
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{ }
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template< class SizeType >
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reversible_ptr_container( SizeType n, unordered_associative_container_tag )
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: c_( n )
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{ }
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template< class SizeType >
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reversible_ptr_container( SizeType n, fixed_length_sequence_tag )
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: c_( n )
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{ }
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template< class SizeType >
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reversible_ptr_container( SizeType n, const allocator_type& a,
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fixed_length_sequence_tag )
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: c_( n, a )
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{ }
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explicit reversible_ptr_container( const allocator_type& a )
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: c_( a )
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{ }
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template< class PtrContainer >
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explicit reversible_ptr_container( std::auto_ptr<PtrContainer> clone )
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{
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swap( *clone );
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}
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reversible_ptr_container( const reversible_ptr_container& r )
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{
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constructor_impl( r.begin(), r.end(), std::forward_iterator_tag() );
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}
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template< class C, class V >
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reversible_ptr_container( const reversible_ptr_container<C,V>& r )
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{
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constructor_impl( r.begin(), r.end(), std::forward_iterator_tag() );
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}
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template< class PtrContainer >
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reversible_ptr_container& operator=( std::auto_ptr<PtrContainer> clone ) // nothrow
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{
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swap( *clone );
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return *this;
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}
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reversible_ptr_container& operator=( reversible_ptr_container r ) // strong
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{
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swap( r );
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return *this;
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}
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// overhead: null-initilization of container pointer (very cheap compared to cloning)
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// overhead: 1 heap allocation (very cheap compared to cloning)
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template< class InputIterator >
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reversible_ptr_container( InputIterator first,
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InputIterator last,
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const allocator_type& a = allocator_type() ) // basic, strong
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: c_( a )
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{
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constructor_impl( first, last,
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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#else
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BOOST_DEDUCED_TYPENAME
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#endif
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iterator_category<InputIterator>::type() );
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}
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template< class Compare >
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reversible_ptr_container( const Compare& comp,
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const allocator_type& a )
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: c_( comp, a ) {}
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template< class ForwardIterator >
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reversible_ptr_container( ForwardIterator first,
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ForwardIterator last,
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fixed_length_sequence_tag )
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: c_( std::distance(first,last) )
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{
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constructor_impl( first, last,
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std::forward_iterator_tag() );
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}
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template< class SizeType, class InputIterator >
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reversible_ptr_container( SizeType n,
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InputIterator first,
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InputIterator last,
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fixed_length_sequence_tag )
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: c_( n )
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{
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constructor_impl( first, last,
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
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#else
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BOOST_DEDUCED_TYPENAME
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#endif
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iterator_category<InputIterator>::type() );
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}
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template< class Compare >
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reversible_ptr_container( const Compare& comp,
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const allocator_type& a,
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associative_container_tag )
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: c_( comp, a )
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{ }
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template< class InputIterator >
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reversible_ptr_container( InputIterator first,
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InputIterator last,
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associative_container_tag )
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{
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associative_constructor_impl( first, last );
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}
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template< class InputIterator, class Compare >
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reversible_ptr_container( InputIterator first,
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InputIterator last,
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const Compare& comp,
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const allocator_type& a,
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associative_container_tag )
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: c_( comp, a )
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{
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associative_constructor_impl( first, last );
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}
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explicit reversible_ptr_container( size_type n )
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: c_( n ) {}
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template< class Hash, class Pred >
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reversible_ptr_container( const Hash& h,
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const Pred& pred,
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const allocator_type& a )
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: c_( h, pred, a ) {}
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template< class InputIterator, class Hash, class Pred >
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reversible_ptr_container( InputIterator first,
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InputIterator last,
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const Hash& h,
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const Pred& pred,
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const allocator_type& a )
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: c_( h, pred, a )
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{
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associative_constructor_impl( first, last );
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}
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public:
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~reversible_ptr_container()
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{
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remove_all();
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}
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public:
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allocator_type get_allocator() const
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{
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return c_.get_allocator();
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}
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public: // container requirements
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iterator begin()
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{ return iterator( c_.begin() ); }
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const_iterator begin() const
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{ return const_iterator( c_.begin() ); }
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iterator end()
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{ return iterator( c_.end() ); }
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const_iterator end() const
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{ return const_iterator( c_.end() ); }
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reverse_iterator rbegin()
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{ return reverse_iterator( this->end() ); }
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const_reverse_iterator rbegin() const
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{ return const_reverse_iterator( this->end() ); }
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reverse_iterator rend()
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{ return reverse_iterator( this->begin() ); }
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const_reverse_iterator rend() const
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{ return const_reverse_iterator( this->begin() ); }
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const_iterator cbegin() const
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{ return const_iterator( c_.begin() ); }
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const_iterator cend() const
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{ return const_iterator( c_.end() ); }
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const_reverse_iterator crbegin() const
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{ return const_reverse_iterator( this->end() ); }
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const_reverse_iterator crend() const
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{ return const_reverse_iterator( this->begin() ); }
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void swap( reversible_ptr_container& r ) // nothrow
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{
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c_.swap( r.c_ );
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}
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size_type size() const // nothrow
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{
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return c_.size();
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}
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size_type max_size() const // nothrow
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{
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return c_.max_size();
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}
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bool empty() const // nothrow
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{
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return c_.empty();
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}
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public: // optional container requirements
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bool operator==( const reversible_ptr_container& r ) const // nothrow
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{
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if( size() != r.size() )
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return false;
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else
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return std::equal( begin(), end(), r.begin() );
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}
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bool operator!=( const reversible_ptr_container& r ) const // nothrow
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{
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return !(*this == r);
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}
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bool operator<( const reversible_ptr_container& r ) const // nothrow
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{
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return std::lexicographical_compare( begin(), end(), r.begin(), r.end() );
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}
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bool operator<=( const reversible_ptr_container& r ) const // nothrow
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{
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return !(r < *this);
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}
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bool operator>( const reversible_ptr_container& r ) const // nothrow
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{
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return r < *this;
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}
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bool operator>=( const reversible_ptr_container& r ) const // nothrow
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{
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return !(*this < r);
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}
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public: // modifiers
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iterator insert( iterator before, Ty_* x )
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{
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enforce_null_policy( x, "Null pointer in 'insert()'" );
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auto_type ptr( x ); // nothrow
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iterator res( c_.insert( before.base(), x ) ); // strong, commit
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ptr.release(); // nothrow
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return res;
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}
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template< class U >
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iterator insert( iterator before, std::auto_ptr<U> x )
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{
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return insert( before, x.release() );
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}
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iterator erase( iterator x ) // nothrow
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{
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BOOST_ASSERT( !empty() );
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BOOST_ASSERT( x != end() );
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remove( x );
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return iterator( c_.erase( x.base() ) );
|
|
}
|
|
|
|
iterator erase( iterator first, iterator last ) // nothrow
|
|
{
|
|
remove( first, last );
|
|
return iterator( c_.erase( first.base(),
|
|
last.base() ) );
|
|
}
|
|
|
|
template< class Range >
|
|
iterator erase( const Range& r )
|
|
{
|
|
return erase( boost::begin(r), boost::end(r) );
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
remove_all();
|
|
c_.clear();
|
|
}
|
|
|
|
public: // access interface
|
|
|
|
auto_type release( iterator where )
|
|
{
|
|
BOOST_ASSERT( where != end() );
|
|
|
|
BOOST_PTR_CONTAINER_THROW_EXCEPTION( empty(), bad_ptr_container_operation,
|
|
"'release()' on empty container" );
|
|
|
|
auto_type ptr( Config::get_pointer( where ) ); // nothrow
|
|
c_.erase( where.base() ); // nothrow
|
|
return boost::ptr_container_detail::move( ptr );
|
|
}
|
|
|
|
auto_type replace( iterator where, Ty_* x ) // strong
|
|
{
|
|
BOOST_ASSERT( where != end() );
|
|
|
|
enforce_null_policy( x, "Null pointer in 'replace()'" );
|
|
|
|
auto_type ptr( x );
|
|
|
|
BOOST_PTR_CONTAINER_THROW_EXCEPTION( empty(), bad_ptr_container_operation,
|
|
"'replace()' on empty container" );
|
|
|
|
auto_type old( Config::get_pointer( where ) ); // nothrow
|
|
const_cast<void*&>(*where.base()) = ptr.release();
|
|
return boost::ptr_container_detail::move( old );
|
|
}
|
|
|
|
template< class U >
|
|
auto_type replace( iterator where, std::auto_ptr<U> x )
|
|
{
|
|
return replace( where, x.release() );
|
|
}
|
|
|
|
auto_type replace( size_type idx, Ty_* x ) // strong
|
|
{
|
|
enforce_null_policy( x, "Null pointer in 'replace()'" );
|
|
|
|
auto_type ptr( x );
|
|
|
|
BOOST_PTR_CONTAINER_THROW_EXCEPTION( idx >= size(), bad_index,
|
|
"'replace()' out of bounds" );
|
|
|
|
auto_type old( static_cast<Ty_*>( c_[idx] ) ); // nothrow
|
|
c_[idx] = ptr.release(); // nothrow, commit
|
|
return boost::ptr_container_detail::move( old );
|
|
}
|
|
|
|
template< class U >
|
|
auto_type replace( size_type idx, std::auto_ptr<U> x )
|
|
{
|
|
return replace( idx, x.release() );
|
|
}
|
|
|
|
}; // 'reversible_ptr_container'
|
|
|
|
|
|
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
|
|
#define BOOST_PTR_CONTAINER_DEFINE_RELEASE( base_type ) \
|
|
typename base_type::auto_type \
|
|
release( typename base_type::iterator i ) \
|
|
{ \
|
|
return boost::ptr_container_detail::move(base_type::release(i)); \
|
|
}
|
|
#else
|
|
#define BOOST_PTR_CONTAINER_DEFINE_RELEASE( base_type ) \
|
|
using base_type::release;
|
|
#endif
|
|
|
|
//
|
|
// two-phase lookup of template functions
|
|
// is buggy on most compilers, so we use a macro instead
|
|
//
|
|
#define BOOST_PTR_CONTAINER_DEFINE_RELEASE_AND_CLONE( PC, base_type, this_type ) \
|
|
explicit PC( std::auto_ptr<this_type> r ) \
|
|
: base_type ( r ) { } \
|
|
\
|
|
PC& operator=( std::auto_ptr<this_type> r ) \
|
|
{ \
|
|
base_type::operator=( r ); \
|
|
return *this; \
|
|
} \
|
|
\
|
|
std::auto_ptr<this_type> release() \
|
|
{ \
|
|
std::auto_ptr<this_type> ptr( new this_type );\
|
|
this->swap( *ptr ); \
|
|
return ptr; \
|
|
} \
|
|
BOOST_PTR_CONTAINER_DEFINE_RELEASE( base_type ) \
|
|
\
|
|
std::auto_ptr<this_type> clone() const \
|
|
{ \
|
|
return std::auto_ptr<this_type>( new this_type( this->begin(), this->end() ) ); \
|
|
}
|
|
|
|
#define BOOST_PTR_CONTAINER_DEFINE_COPY_CONSTRUCTORS( PC, base_type ) \
|
|
\
|
|
template< class U > \
|
|
PC( const PC<U>& r ) : base_type( r ) { } \
|
|
\
|
|
PC& operator=( PC r ) \
|
|
{ \
|
|
this->swap( r ); \
|
|
return *this; \
|
|
} \
|
|
|
|
|
|
#define BOOST_PTR_CONTAINER_DEFINE_CONSTRUCTORS( PC, base_type ) \
|
|
typedef BOOST_DEDUCED_TYPENAME base_type::iterator iterator; \
|
|
typedef BOOST_DEDUCED_TYPENAME base_type::size_type size_type; \
|
|
typedef BOOST_DEDUCED_TYPENAME base_type::const_reference const_reference; \
|
|
typedef BOOST_DEDUCED_TYPENAME base_type::allocator_type allocator_type; \
|
|
PC() {} \
|
|
explicit PC( const allocator_type& a ) : base_type(a) {} \
|
|
template< class InputIterator > \
|
|
PC( InputIterator first, InputIterator last ) : base_type( first, last ) {} \
|
|
template< class InputIterator > \
|
|
PC( InputIterator first, InputIterator last, \
|
|
const allocator_type& a ) : base_type( first, last, a ) {}
|
|
|
|
#define BOOST_PTR_CONTAINER_DEFINE_NON_INHERITED_MEMBERS( PC, base_type, this_type ) \
|
|
BOOST_PTR_CONTAINER_DEFINE_CONSTRUCTORS( PC, base_type ) \
|
|
BOOST_PTR_CONTAINER_DEFINE_RELEASE_AND_CLONE( PC, base_type, this_type )
|
|
|
|
#define BOOST_PTR_CONTAINER_DEFINE_SEQEUENCE_MEMBERS( PC, base_type, this_type ) \
|
|
BOOST_PTR_CONTAINER_DEFINE_NON_INHERITED_MEMBERS( PC, base_type, this_type ) \
|
|
BOOST_PTR_CONTAINER_DEFINE_COPY_CONSTRUCTORS( PC, base_type )
|
|
|
|
} // namespace 'ptr_container_detail'
|
|
|
|
//
|
|
// @remark: expose movability of internal move-pointer
|
|
//
|
|
namespace ptr_container
|
|
{
|
|
using ptr_container_detail::move;
|
|
}
|
|
|
|
} // namespace 'boost'
|
|
|
|
#if BOOST_WORKAROUND(BOOST_MSVC, >= 1400)
|
|
#pragma warning(pop)
|
|
#endif
|
|
|
|
#endif
|