1
//-----------------------------------------------------------------------------
2
// boost mpl/aux_/front_impl.hpp header file
3
// See http://www.boost.org for updates, documentation, and revision history.
4
//-----------------------------------------------------------------------------
6
// Copyright (c) 2000-02
9
// Permission to use, copy, modify, distribute and sell this software
10
// and its documentation for any purpose is hereby granted without fee,
11
// provided that the above copyright notice appears in all copies and
12
// that both the copyright notice and this permission notice appear in
13
// supporting documentation. No representations are made about the
14
// suitability of this software for any purpose. It is provided "as is"
15
// without express or implied warranty.
17
#ifndef BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED
18
#define BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED
20
#include "boost/mpl/front_fwd.hpp"
21
#include "boost/mpl/begin_end.hpp"
22
#include "boost/mpl/aux_/deref_wknd.hpp"
23
#include "boost/mpl/aux_/traits_lambda_spec.hpp"
28
// default implementation; conrete sequences might override it by
29
// specializing either the |front_traits| or the primary |front| template
31
template< typename Tag >
34
template< typename Sequence > struct algorithm
36
typedef typename begin<Sequence>::type iter_;
37
typedef typename BOOST_MPL_AUX_DEREF_WNKD(iter_) type;
41
BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1,front_traits)
46
#endif // BOOST_MPL_AUX_FRONT_IMPL_HPP_INCLUDED