Chris@16: // (C) Copyright Jonathan Turkanis 2004-2005.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
Chris@16: 
Chris@16: // Contains the definition of move_ptrs::default_deleter, the default
Chris@16: // Deleter template argument to move_ptr. Uses a technique of Daniel
Chris@16: // Wallin to capture the type of a pointer at the time the deleter 
Chris@16: // is constructed, so that move_ptrs can delete objects of incomplete 
Chris@16: // type by default.
Chris@16: 
Chris@16: #ifndef BOOST_MOVE_PTR_DEFAULT_DELETER_HPP_INCLUDED
Chris@16: #define BOOST_MOVE_PTR_DEFAULT_DELETER_HPP_INCLUDED 
Chris@16: 
Chris@16: #include <boost/checked_delete.hpp>
Chris@16: #include <boost/mpl/if.hpp>
Chris@16: #include <boost/type_traits/is_array.hpp>
Chris@16: #include <boost/type_traits/remove_bounds.hpp>
Chris@16: 
Chris@16: namespace boost { namespace ptr_container_detail { namespace move_ptrs {
Chris@16: 
Chris@16: namespace ptr_container_detail {
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct deleter_base {
Chris@16:     typedef void (*deleter)(T*);
Chris@16:     deleter_base(deleter d) { delete_ = d; }
Chris@16:     void operator() (T* t) const { delete_(t); }
Chris@16:     static deleter delete_;
Chris@16: };
Chris@16: 
Chris@16: template<class T>
Chris@16: typename deleter_base<T>::deleter 
Chris@16: deleter_base<T>::delete_;
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct scalar_deleter : deleter_base<T> {
Chris@16:     typedef deleter_base<T> base;
Chris@16:     scalar_deleter() : base(do_delete) { }
Chris@16:     static void do_delete(T* t) { checked_delete(t); }
Chris@16: };
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct array_deleter 
Chris@16:     : deleter_base<typename remove_bounds<T>::type>
Chris@16: {
Chris@16:     typedef typename remove_bounds<T>::type element_type;
Chris@16:     typedef deleter_base<element_type> base;
Chris@16:     array_deleter() : base(do_delete) { }
Chris@16:     static void do_delete(element_type* t) { checked_array_delete(t); }
Chris@16: };
Chris@16: 
Chris@16: } // End namespace ptr_container_detail.
Chris@16: 
Chris@16: template<typename T>
Chris@16: struct default_deleter
Chris@16:     : mpl::if_<
Chris@16:           is_array<T>,
Chris@16:           ptr_container_detail::array_deleter<T>,
Chris@16:           ptr_container_detail::scalar_deleter<T>
Chris@16:       >::type
Chris@16: { 
Chris@16:     default_deleter() { }
Chris@16:     template<typename TT>
Chris@16:     default_deleter(default_deleter<TT> tt) { }
Chris@16: };
Chris@16: 
Chris@16: } } } // End namespaces ptr_container_detail, move_ptrs, boost.
Chris@16: 
Chris@16: #endif // #ifndef BOOST_MOVE_PTR_DEFAULT_DELETER_HPP_INCLUDED