You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
88 lines
2.1 KiB
88 lines
2.1 KiB
3 years ago
|
|
||
|
|
#ifndef BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
|
||
|
|
#define BOOST_MPL_O1_SIZE_IMPL_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/O1_size_fwd.hpp>
|
||
|
|
#include <boost/mpl/long.hpp>
|
||
|
|
#include <boost/mpl/if.hpp>
|
||
|
|
#include <boost/mpl/aux_/has_size.hpp>
|
||
|
|
#include <boost/mpl/aux_/config/forwarding.hpp>
|
||
|
|
#include <boost/mpl/aux_/config/static_constant.hpp>
|
||
|
|
#include <boost/mpl/aux_/config/msvc.hpp>
|
||
|
|
#include <boost/mpl/aux_/config/workaround.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace mpl {
|
||
|
|
|
||
|
|
// default implementation - returns 'Sequence::size' if sequence has a 'size'
|
||
|
|
// member, and -1 otherwise; conrete sequences might override it by
|
||
|
|
// specializing either the 'O1_size_impl' or the primary 'O1_size' template
|
||
|
|
|
||
|
|
# if !BOOST_WORKAROUND(BOOST_MSVC, < 1300) \
|
||
|
|
&& !BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
|
||
|
|
|
||
|
|
namespace aux {
|
||
|
|
template< typename Sequence > struct O1_size_impl
|
||
|
|
: Sequence::size
|
||
|
|
{
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
template< typename Tag >
|
||
|
|
struct O1_size_impl
|
||
|
|
{
|
||
|
|
template< typename Sequence > struct apply
|
||
|
|
#if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING)
|
||
|
|
: if_<
|
||
|
|
aux::has_size<Sequence>
|
||
|
|
, aux::O1_size_impl<Sequence>
|
||
|
|
, long_<-1>
|
||
|
|
>::type
|
||
|
|
{
|
||
|
|
#else
|
||
|
|
{
|
||
|
|
typedef typename if_<
|
||
|
|
aux::has_size<Sequence>
|
||
|
|
, aux::O1_size_impl<Sequence>
|
||
|
|
, long_<-1>
|
||
|
|
>::type type;
|
||
|
|
|
||
|
|
BOOST_STATIC_CONSTANT(long, value =
|
||
|
|
(if_<
|
||
|
|
aux::has_size<Sequence>
|
||
|
|
, aux::O1_size_impl<Sequence>
|
||
|
|
, long_<-1>
|
||
|
|
>::type::value)
|
||
|
|
);
|
||
|
|
#endif
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
# else // BOOST_MSVC
|
||
|
|
|
||
|
|
template< typename Tag >
|
||
|
|
struct O1_size_impl
|
||
|
|
{
|
||
|
|
template< typename Sequence > struct apply
|
||
|
|
: long_<-1>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
# endif
|
||
|
|
|
||
|
|
}}
|
||
|
|
|
||
|
|
#endif // BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
|