boost/xpressive/proto/args.hpp
#ifndef BOOST_PP_IS_ITERATING
///////////////////////////////////////////////////////////////////////////////
/// \file args.hpp
/// Contains definition of args\<\> class template.
//
// Copyright 2007 Eric Niebler. 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)
#ifndef BOOST_PROTO_ARGS_HPP_EAN_04_01_2005
#define BOOST_PROTO_ARGS_HPP_EAN_04_01_2005
#include <boost/xpressive/proto/detail/prefix.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/preprocessor/arithmetic/dec.hpp>
#include <boost/preprocessor/iteration/iterate.hpp>
#include <boost/preprocessor/repetition/enum_params.hpp>
#include <boost/preprocessor/repetition/repeat.hpp>
#include <boost/preprocessor/repetition/repeat_from_to.hpp>
#include <boost/mpl/void.hpp>
#include <boost/xpressive/proto/proto_fwd.hpp>
#include <boost/xpressive/proto/detail/suffix.hpp>
namespace boost { namespace proto
{
namespace argsns_
{
#define BOOST_PROTO_DEFINE_ARG_N(z, n, data)\
typedef BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(arg, n);
#define BOOST_PROTO_DEFINE_VOID_N(z, n, data)\
typedef mpl::void_ BOOST_PP_CAT(arg, n);
/// \brief A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
///
/// A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
/// The types in the sequence correspond to the children of a node in an expression tree.
template< typename Arg0 >
struct args0
{
BOOST_STATIC_CONSTANT(long, size = 0);
typedef Arg0 arg0;
BOOST_PP_REPEAT_FROM_TO(1, BOOST_PROTO_MAX_ARITY, BOOST_PROTO_DEFINE_VOID_N, ~)
/// INTERNAL ONLY
///
typedef Arg0 back_;
};
#define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_PROTO_MAX_ARITY, <boost/xpressive/proto/args.hpp>))
#include BOOST_PP_ITERATE()
#undef BOOST_PROTO_DEFINE_ARG_N
#undef BOOST_PROTO_DEFINE_VOID_N
}
using namespace argsns_;
}}
#endif
#else
#define N BOOST_PP_ITERATION()
/// \brief A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
///
/// A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
/// The types in the sequence correspond to the children of a node in an expression tree.
template< BOOST_PP_ENUM_PARAMS(N, typename Arg) >
struct BOOST_PP_CAT(args, N)
{
BOOST_STATIC_CONSTANT(long, size = N);
BOOST_PP_REPEAT(N, BOOST_PROTO_DEFINE_ARG_N, ~)
BOOST_PP_REPEAT_FROM_TO(N, BOOST_PROTO_MAX_ARITY, BOOST_PROTO_DEFINE_VOID_N, ~)
/// INTERNAL ONLY
///
typedef BOOST_PP_CAT(Arg, BOOST_PP_DEC(N)) back_;
};
#undef N
#endif