// (C) Copyright Thorsten Ottosen 2005. | |
// (C) Copyright Jonathan Turkanis 2004. | |
// (C) Copyright Daniel Wallin 2004. | |
// 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.) | |
// Implementation of the move_ptr from the "Move Proposal" | |
// (http://std.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1377.htm) | |
// enhanced to support custom deleters and safe boolean conversions. | |
// | |
// The implementation is based on an implementation by Daniel Wallin, at | |
// "http://aspn.activestate.com/ASPN/Mail/Message/Attachments/boost/ | |
// 400DC271.1060903@student.umu.se/move_ptr.hpp". The current was adapted | |
// by Jonathan Turkanis to incorporating ideas of Howard Hinnant and | |
// Rani Sharoni. | |
#ifndef BOOST_STATIC_MOVE_PTR_HPP_INCLUDED | |
#define BOOST_STATIC_MOVE_PTR_HPP_INCLUDED | |
#include <boost/config.hpp> // Member template friends, put size_t in std. | |
#include <cstddef> // size_t | |
#include <boost/compressed_pair.hpp> | |
#include <boost/ptr_container/detail/default_deleter.hpp> | |
#include <boost/ptr_container/detail/is_convertible.hpp> | |
#include <boost/ptr_container/detail/move.hpp> | |
#include <boost/static_assert.hpp> | |
#include <boost/type_traits/add_reference.hpp> | |
#include <boost/type_traits/is_array.hpp> | |
#if defined(BOOST_MSVC) | |
#pragma warning(push) | |
#pragma warning(disable:4521) // Multiple copy constuctors. | |
#endif | |
namespace boost { namespace ptr_container_detail { | |
template< typename T, | |
typename Deleter = | |
move_ptrs::default_deleter<T> > | |
class static_move_ptr | |
{ | |
public: | |
typedef typename remove_bounds<T>::type element_type; | |
typedef Deleter deleter_type; | |
private: | |
struct safe_bool_helper { int x; }; | |
typedef int safe_bool_helper::* safe_bool; | |
typedef boost::compressed_pair<element_type*, Deleter> impl_type; | |
public: | |
typedef typename impl_type::second_reference deleter_reference; | |
typedef typename impl_type::second_const_reference deleter_const_reference; | |
// Constructors | |
static_move_ptr() : impl_(0) { } | |
static_move_ptr(const static_move_ptr& p) | |
: impl_(p.get(), p.get_deleter()) | |
{ | |
const_cast<static_move_ptr&>(p).release(); | |
} | |
#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) | |
static_move_ptr( const move_ptrs::move_source<static_move_ptr<T,Deleter> >& src ) | |
#else | |
static_move_ptr( const move_ptrs::move_source<static_move_ptr>& src ) | |
#endif | |
: impl_(src.ptr().get(), src.ptr().get_deleter()) | |
{ | |
src.ptr().release(); | |
} | |
template<typename TT> | |
explicit static_move_ptr(TT* tt) | |
: impl_(tt, Deleter()) | |
{ } | |
// Destructor | |
~static_move_ptr() { if (ptr()) get_deleter()(ptr()); } | |
// Assignment | |
static_move_ptr& operator=(static_move_ptr rhs) | |
{ | |
rhs.swap(*this); | |
return *this; | |
} | |
// Smart pointer interface | |
element_type* get() const { return ptr(); } | |
element_type& operator*() | |
{ | |
/*BOOST_STATIC_ASSERT(!is_array);*/ return *ptr(); | |
} | |
const element_type& operator*() const | |
{ | |
/*BOOST_STATIC_ASSERT(!is_array);*/ return *ptr(); | |
} | |
element_type* operator->() | |
{ | |
/*BOOST_STATIC_ASSERT(!is_array);*/ return ptr(); | |
} | |
const element_type* operator->() const | |
{ | |
/*BOOST_STATIC_ASSERT(!is_array);*/ return ptr(); | |
} | |
element_type* release() | |
{ | |
element_type* result = ptr(); | |
ptr() = 0; | |
return result; | |
} | |
void reset() | |
{ | |
if (ptr()) get_deleter()(ptr()); | |
ptr() = 0; | |
} | |
template<typename TT> | |
void reset(TT* tt) | |
{ | |
static_move_ptr(tt).swap(*this); | |
} | |
template<typename TT, typename DD> | |
void reset(TT* tt, DD dd) | |
{ | |
static_move_ptr(tt, dd).swap(*this); | |
} | |
operator safe_bool() const { return ptr() ? &safe_bool_helper::x : 0; } | |
void swap(static_move_ptr& p) { impl_.swap(p.impl_); } | |
deleter_reference get_deleter() { return impl_.second(); } | |
deleter_const_reference get_deleter() const { return impl_.second(); } | |
private: | |
template<typename TT, typename DD> | |
void check(const static_move_ptr<TT, DD>& ptr) | |
{ | |
typedef move_ptrs::is_smart_ptr_convertible<TT, T> convertible; | |
BOOST_STATIC_ASSERT(convertible::value); | |
} | |
#if defined(BOOST_NO_FUNCTION_TEMPLATE_ORDERING) || defined(BOOST_NO_SFINAE) | |
// give up on this behavior | |
#else | |
template<typename Ptr> struct cant_move_from_const; | |
template<typename TT, typename DD> | |
struct cant_move_from_const< const static_move_ptr<TT, DD> > { | |
typedef typename static_move_ptr<TT, DD>::error type; | |
}; | |
template<typename Ptr> | |
static_move_ptr(Ptr&, typename cant_move_from_const<Ptr>::type = 0); | |
public: | |
static_move_ptr(static_move_ptr&); | |
private: | |
template<typename TT, typename DD> | |
static_move_ptr( static_move_ptr<TT, DD>&, | |
typename | |
move_ptrs::enable_if_convertible< | |
TT, T, static_move_ptr& | |
>::type::type* = 0 ); | |
#endif // BOOST_NO_FUNCTION_TEMPLATE_ORDERING || BOOST_NO_SFINAE | |
//#ifndef BOOST_NO_MEMBER_TEMPLATE_FRIENDS | |
// template<typename TT, typename DD> | |
// friend class static_move_ptr; | |
//#else | |
public: | |
//#endif | |
typename impl_type::first_reference | |
ptr() { return impl_.first(); } | |
typename impl_type::first_const_reference | |
ptr() const { return impl_.first(); } | |
impl_type impl_; | |
}; | |
} // namespace ptr_container_detail | |
} // End namespace boost. | |
#if defined(BOOST_MSVC) | |
#pragma warning(pop) // #pragma warning(disable:4251) | |
#endif | |
#endif // #ifndef BOOST_STATIC_MOVE_PTR_HPP_INCLUDED |