// (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 |