2 #ifndef BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
3 #define BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
5 // Copyright Aleksey Gurtovoy 2000-2004
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)
11 // See http://www.boost.org/libs/mpl for documentation.
13 // $Id: O1_size_impl.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
14 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
17 #include <boost/mpl/O1_size_fwd.hpp>
18 #include <boost/mpl/long.hpp>
19 #include <boost/mpl/if.hpp>
20 #include <boost/mpl/aux_/has_size.hpp>
21 #include <boost/mpl/aux_/config/forwarding.hpp>
22 #include <boost/mpl/aux_/config/static_constant.hpp>
23 #include <boost/mpl/aux_/config/msvc.hpp>
24 #include <boost/mpl/aux_/config/workaround.hpp>
26 namespace boost
{ namespace mpl
{
28 // default implementation - returns 'Sequence::size' if sequence has a 'size'
29 // member, and -1 otherwise; conrete sequences might override it by
30 // specializing either the 'O1_size_impl' or the primary 'O1_size' template
32 # if !BOOST_WORKAROUND(BOOST_MSVC, < 1300) \
33 && !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
36 template< typename Sequence
> struct O1_size_impl
42 template< typename Tag
>
45 template< typename Sequence
> struct apply
46 #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
48 aux::has_size
<Sequence
>
49 , aux::O1_size_impl
<Sequence
>
56 aux::has_size
<Sequence
>
57 , aux::O1_size_impl
<Sequence
>
61 BOOST_STATIC_CONSTANT(long, value
=
63 aux::has_size
<Sequence
>
64 , aux::O1_size_impl
<Sequence
>
74 template< typename Tag
>
77 template< typename Sequence
> struct apply
87 #endif // BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED