70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
// (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
|