boost/mpl/aux_/arity.hpp

#ifndef BOOST_MPL_AUX_ARITY_HPP_INCLUDED
#define BOOST_MPL_AUX_ARITY_HPP_INCLUDED
// Copyright Aleksey Gurtovoy 2001-2004
//
// 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/aux_/config/dtp.hpp>
#if defined(BOOST_MPL_CFG_BROKEN_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES)
#   include <boost/mpl/aux_/nttp_decl.hpp>
#   include <boost/mpl/aux_/config/static_constant.hpp>
namespace boost { namespace mpl { namespace aux {
// agurt, 15/mar/02: it's possible to implement the template so that it will 
// "just work" and do not require any specialization, but not on the compilers
// that require the arity workaround in the first place
template< typename F, BOOST_MPL_AUX_NTTP_DECL(int, N) >
struct arity
{
    BOOST_STATIC_CONSTANT(int, value = N);
};
}}}
#endif // BOOST_MPL_CFG_BROKEN_DEFAULT_PARAMETERS_IN_NESTED_TEMPLATES
#endif // BOOST_MPL_AUX_ARITY_HPP_INCLUDED