Update of /cvsroot/boost/boost/boost/fusion/sequence/adapted/struct
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv13955/struct
Added Files:
struct_iterator.hpp
Log Message:
added struct wrapping facilities to make it very easy to make any struct a
conforming fusion sequence
--- NEW FILE: struct_iterator.hpp ---
/*=============================================================================
Copyright (c) 2001-2007 Joel de Guzman
Copyright (c) 2005-2006 Dan Marsden
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)
==============================================================================*/
#if !defined(FUSION_STRUCT_ITERATOR_APRIL_2_2007_1008AM)
#define FUSION_STRUCT_ITERATOR_APRIL_2_2007_1008AM
#include <boost/fusion/iterator/iterator_facade.hpp>
#include <boost/type_traits/is_const.hpp>
#include <boost/type_traits/add_reference.hpp>
#include <boost/type_traits/add_const.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/mpl/identity.hpp>
#include <boost/mpl/if.hpp>
#include <boost/mpl/int.hpp>
#include <boost/mpl/minus.hpp>
#include <utility>
namespace boost { namespace fusion
{
namespace extension
{
template <typename Struct, int N>
struct struct_member;
template <typename Struct>
struct struct_size;
template <typename Struct, int N>
struct struct_member<Struct const, N>
{
typedef typename
add_const<typename struct_member<Struct, N>::type>::type
type;
static type&
call(Struct const& struct_)
{
return struct_member<Struct, N>::call(
const_cast<Struct&>(struct_));
}
};
template <typename Struct>
struct struct_size<Struct const>
: struct_size<Struct>
{};
}
struct random_access_traversal_tag;
template <typename Struct, int N_>
struct struct_iterator
: iterator_facade<struct_iterator<Struct, N_>,
random_access_traversal_tag>
{
BOOST_MPL_ASSERT_RELATION(N_, >=, 0);
BOOST_MPL_ASSERT_RELATION(N_, <=,
extension::struct_size<Struct>::value);
typedef mpl::int_<N_> index;
typedef Struct struct_type;
struct_iterator(Struct& struct_)
: struct_(struct_) {}
Struct& struct_;
template <typename Iterator>
struct value_of
: extension::struct_member<Struct, N_>
{
};
template <typename Iterator>
struct deref
{
typedef typename
add_reference<
typename extension::struct_member<Struct, N_>::type
>::type
type;
static type
call(Iterator const& iter)
{
return extension::struct_member<Struct, N_>::
call(iter.struct_);
}
};
template <typename Iterator, typename N>
struct advance
{
typedef typename Iterator::index index;
typedef typename Iterator::struct_type struct_type;
typedef struct_iterator<struct_type, index::value + N::value> type;
static type
call(Iterator const& iter)
{
return type(iter.struct_);
}
};
template <typename Iterator>
struct next : advance<Iterator, mpl::int_<1> > {};
template <typename Iterator>
struct prior : advance<Iterator, mpl::int_<-1> > {};
template <typename I1, typename I2>
struct distance : mpl::minus<typename I2::index, typename I1::index>
{
typedef typename
mpl::minus<
typename I2::index, typename I1::index
>::type
type;
static type
call(I1 const&, I2 const&)
{
return type();
}
};
};
}}
#endif
-------------------------------------------------------------------------
Take Surveys. Earn Cash. Influence the Future of IT
Join SourceForge.net's Techsay panel and you'll get the chance to share your
opinions on IT & business topics through brief surveys-and earn cash
http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV
_______________________________________________
Boost-cvs mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/boost-cvs
