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//-----------------------------------------------------------------------------
// boost mpl/aux_/O1_size_impl.hpp header file
// See http://www.boost.org for updates, documentation, and revision history.
//-----------------------------------------------------------------------------
//
// Copyright (c) 2000-02
// Aleksey Gurtovoy
//
// Permission to use, copy, modify, distribute and sell this software
// and its documentation for any purpose is hereby granted without fee,
// provided that the above copyright notice appears in all copies and
// that both the copyright notice and this permission notice appear in
// supporting documentation. No representations are made about the
// suitability of this software for any purpose. It is provided "as is"
// without express or implied warranty.
#ifndef BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
#define BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
#include "boost/mpl/O1_size_fwd.hpp"
#include "boost/mpl/integral_c.hpp"
#include "boost/mpl/if.hpp"
#include "boost/mpl/aux_/has_size.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_traits| or the primary |O1_size| template
#if 0//!defined(BOOST_MSVC) || BOOST_MSVC > 1300
namespace aux {
template< typename Sequence >
struct O1_size_impl
: Sequence::size
{
};
} // namespace aux
template< typename Tag >
struct O1_size_traits
{
template< typename Sequence > struct algorithm
: if_c<
::boost::mpl::aux::has_size<Sequence>::value
, aux::O1_size_impl<Sequence>
, integral_c<long,-1>
>::type
{
};
};
#else
template< typename Tag >
struct O1_size_traits
{
template< typename Sequence > struct algorithm
: integral_c<long,-1>
{
};
};
#endif // BOOST_MSVC > 1300
} // namespace mpl
} // namespace boost
#endif // BOOST_MPL_O1_SIZE_IMPL_HPP_INCLUDED
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Mr. Shah is a reclusive C++/C# developer lurking somewhere in the depths of the city of London. He learnt physics at Kings' College London and obtained a Master in Science there. Having earned an MCAD, he teeters on the brink of transitioning from C++ to C#, unsure of which language to jump to. Fortunately, he also knows how to use .NET interop to merge code between the two languages (which means he won't have to make the choice anytime soon).
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