1
2#ifndef BOOST_MPL_AUX_SIZE_IMPL_HPP_INCLUDED
3#define BOOST_MPL_AUX_SIZE_IMPL_HPP_INCLUDED
4
5// Copyright Aleksey Gurtovoy 2000-2004
6//
7// Distributed under the Boost Software License, Version 1.0.
8// (See accompanying file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10//
11// See http://www.boost.org/libs/mpl for documentation.
12
13// $Id$
14// $Date$
15// $Revision$
16
17#include <boost/mpl/size_fwd.hpp>
18#include <boost/mpl/begin_end.hpp>
19#include <boost/mpl/distance.hpp>
20#include <boost/mpl/aux_/traits_lambda_spec.hpp>
21#include <boost/mpl/aux_/config/workaround.hpp>
22
23namespace boost { namespace mpl {
24
25// default implementation; conrete sequences might override it by
26// specializing either the 'size_impl' or the primary 'size' template
27
28template< typename Tag >
29struct size_impl
30{
31 template< typename Sequence > struct apply
32#if !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561))
33 : distance<
34 typename begin<Sequence>::type
35 , typename end<Sequence>::type
36 >
37 {
38#else
39 {
40 typedef typename distance<
41 typename begin<Sequence>::type
42 , typename end<Sequence>::type
43 >::type type;
44#endif
45 };
46};
47
48BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(1, size_impl)
49
50}}
51
52#endif // BOOST_MPL_AUX_SIZE_IMPL_HPP_INCLUDED
53