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