84 lines
3.1 KiB
C++
Executable File
84 lines
3.1 KiB
C++
Executable File
#ifndef BOOST_PP_IS_ITERATING
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///////////////////////////////////////////////////////////////////////////////
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/// \file args.hpp
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/// Contains definition of args\<\> class template.
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//
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// Copyright 2008 Eric Niebler. Distributed under the Boost
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// Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PROTO_ARGS_HPP_EAN_04_01_2005
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#define BOOST_PROTO_ARGS_HPP_EAN_04_01_2005
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#include <boost/xpressive/proto/detail/prefix.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/arithmetic/dec.hpp>
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#include <boost/preprocessor/iteration/iterate.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/mpl/void.hpp>
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#include <boost/xpressive/proto/proto_fwd.hpp>
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#include <boost/xpressive/proto/detail/suffix.hpp>
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namespace boost { namespace proto
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{
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namespace argsns_
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{
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#define BOOST_PROTO_DEFINE_ARG_N(z, n, data)\
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typedef BOOST_PP_CAT(Arg, n) BOOST_PP_CAT(arg, n);
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#define BOOST_PROTO_DEFINE_VOID_N(z, n, data)\
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typedef mpl::void_ BOOST_PP_CAT(arg, n);
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/// \brief A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
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///
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/// A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
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/// The types in the sequence correspond to the children of a node in an expression tree.
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template< typename Arg0 >
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struct args0
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{
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BOOST_STATIC_CONSTANT(long, size = 0);
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typedef Arg0 arg0;
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BOOST_PP_REPEAT_FROM_TO(1, BOOST_PROTO_MAX_ARITY, BOOST_PROTO_DEFINE_VOID_N, ~)
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/// INTERNAL ONLY
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///
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typedef Arg0 back_;
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};
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#define BOOST_PP_ITERATION_PARAMS_1 (3, (1, BOOST_PROTO_MAX_ARITY, <boost/xpressive/proto/args.hpp>))
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#include BOOST_PP_ITERATE()
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#undef BOOST_PROTO_DEFINE_ARG_N
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#undef BOOST_PROTO_DEFINE_VOID_N
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}
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using namespace argsns_;
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}}
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#endif
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#else
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#define N BOOST_PP_ITERATION()
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/// \brief A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
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///
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/// A type sequence, for use as the 2nd parameter to the \c expr\<\> class template.
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/// The types in the sequence correspond to the children of a node in an expression tree.
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template< BOOST_PP_ENUM_PARAMS(N, typename Arg) >
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struct BOOST_PP_CAT(args, N)
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{
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BOOST_STATIC_CONSTANT(long, size = N);
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BOOST_PP_REPEAT(N, BOOST_PROTO_DEFINE_ARG_N, ~)
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BOOST_PP_REPEAT_FROM_TO(N, BOOST_PROTO_MAX_ARITY, BOOST_PROTO_DEFINE_VOID_N, ~)
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/// INTERNAL ONLY
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///
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typedef BOOST_PP_CAT(Arg, BOOST_PP_DEC(N)) back_;
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};
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#undef N
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#endif
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