mirror of
https://github.com/yuzu-emu/ext-boost.git
synced 2024-12-23 03:15:29 +00:00
77 lines
1.9 KiB
C++
77 lines
1.9 KiB
C++
|
|
#ifndef BOOST_MPL_ADVANCE_HPP_INCLUDED
|
|
#define BOOST_MPL_ADVANCE_HPP_INCLUDED
|
|
|
|
// Copyright Aleksey Gurtovoy 2000-2004
|
|
//
|
|
// 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)
|
|
//
|
|
// See http://www.boost.org/libs/mpl for documentation.
|
|
|
|
// $Id$
|
|
// $Date$
|
|
// $Revision$
|
|
|
|
#include <boost/mpl/advance_fwd.hpp>
|
|
#include <boost/mpl/less.hpp>
|
|
#include <boost/mpl/negate.hpp>
|
|
#include <boost/mpl/long.hpp>
|
|
#include <boost/mpl/if.hpp>
|
|
#include <boost/mpl/tag.hpp>
|
|
#include <boost/mpl/apply_wrap.hpp>
|
|
#include <boost/mpl/aux_/advance_forward.hpp>
|
|
#include <boost/mpl/aux_/advance_backward.hpp>
|
|
#include <boost/mpl/aux_/value_wknd.hpp>
|
|
#include <boost/mpl/aux_/na_spec.hpp>
|
|
#include <boost/mpl/aux_/nttp_decl.hpp>
|
|
|
|
namespace boost { namespace mpl {
|
|
|
|
// default implementation for forward/bidirectional iterators
|
|
template< typename Tag >
|
|
struct advance_impl
|
|
{
|
|
template< typename Iterator, typename N > struct apply
|
|
{
|
|
typedef typename less< N,long_<0> >::type backward_;
|
|
typedef typename if_< backward_, negate<N>, N >::type offset_;
|
|
|
|
typedef typename if_<
|
|
backward_
|
|
, aux::advance_backward< BOOST_MPL_AUX_VALUE_WKND(offset_)::value >
|
|
, aux::advance_forward< BOOST_MPL_AUX_VALUE_WKND(offset_)::value >
|
|
>::type f_;
|
|
|
|
typedef typename apply_wrap1<f_,Iterator>::type type;
|
|
};
|
|
};
|
|
|
|
|
|
template<
|
|
typename BOOST_MPL_AUX_NA_PARAM(Iterator)
|
|
, typename BOOST_MPL_AUX_NA_PARAM(N)
|
|
>
|
|
struct advance
|
|
: advance_impl< typename tag<Iterator>::type >
|
|
::template apply<Iterator,N>
|
|
{
|
|
};
|
|
|
|
template<
|
|
typename Iterator
|
|
, BOOST_MPL_AUX_NTTP_DECL(long, N)
|
|
>
|
|
struct advance_c
|
|
: advance_impl< typename tag<Iterator>::type >
|
|
::template apply<Iterator,long_<N> >
|
|
{
|
|
};
|
|
|
|
BOOST_MPL_AUX_NA_SPEC(2, advance)
|
|
|
|
}}
|
|
|
|
#endif // BOOST_MPL_ADVANCE_HPP_INCLUDED
|