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