| // (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 |