2010-07-26 17:06:36 +00:00
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// NO INCLUDE GUARDS, THE HEADER IS INTENDED FOR MULTIPLE INCLUSION
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// Copyright Aleksey Gurtovoy 2000-2004
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//
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// See http://www.boost.org/libs/mpl for documentation.
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// $Id: count_args.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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// $Revision: 49267 $
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#include <boost/preprocessor/expr_if.hpp>
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#include <boost/preprocessor/inc.hpp>
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#include <boost/preprocessor/cat.hpp>
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#if !defined(AUX778076_COUNT_ARGS_PARAM_NAME)
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# define AUX778076_COUNT_ARGS_PARAM_NAME T
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#endif
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#if !defined(AUX778076_COUNT_ARGS_TEMPLATE_PARAM)
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# define AUX778076_COUNT_ARGS_TEMPLATE_PARAM typename AUX778076_COUNT_ARGS_PARAM_NAME
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#endif
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// local macros, #undef-ined at the end of the header
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#if !defined(AUX778076_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES)
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# include <boost/mpl/aux_/preprocessor/repeat.hpp>
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# include <boost/mpl/aux_/preprocessor/params.hpp>
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# define AUX778076_COUNT_ARGS_REPEAT BOOST_MPL_PP_REPEAT
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# define AUX778076_COUNT_ARGS_PARAMS(param) \
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BOOST_MPL_PP_PARAMS( \
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AUX778076_COUNT_ARGS_ARITY \
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, param \
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) \
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/**/
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#else
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# include <boost/preprocessor/enum_shifted_params.hpp>
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# include <boost/preprocessor/repeat.hpp>
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# include <boost/preprocessor/inc.hpp>
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# define AUX778076_COUNT_ARGS_REPEAT BOOST_PP_REPEAT
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# define AUX778076_COUNT_ARGS_PARAMS(param) \
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BOOST_PP_ENUM_SHIFTED_PARAMS( \
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BOOST_PP_INC(AUX778076_COUNT_ARGS_ARITY) \
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, param \
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) \
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/**/
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#endif // AUX778076_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES
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#define AUX778076_IS_ARG_TEMPLATE_NAME \
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BOOST_PP_CAT(is_,BOOST_PP_CAT(AUX778076_COUNT_ARGS_PREFIX,_arg)) \
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/**/
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#define AUX778076_COUNT_ARGS_FUNC(unused, i, param) \
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BOOST_PP_EXPR_IF(i, +) \
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AUX778076_IS_ARG_TEMPLATE_NAME<BOOST_PP_CAT(param,BOOST_PP_INC(i))>::value \
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/**/
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// is_<xxx>_arg
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template< AUX778076_COUNT_ARGS_TEMPLATE_PARAM >
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struct AUX778076_IS_ARG_TEMPLATE_NAME
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{
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template<>
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struct AUX778076_IS_ARG_TEMPLATE_NAME<AUX778076_COUNT_ARGS_DEFAULT>
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{
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BOOST_STATIC_CONSTANT(bool, value = false);
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};
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// <xxx>_count_args
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template<
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AUX778076_COUNT_ARGS_PARAMS(AUX778076_COUNT_ARGS_TEMPLATE_PARAM)
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>
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struct BOOST_PP_CAT(AUX778076_COUNT_ARGS_PREFIX,_count_args)
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{
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BOOST_STATIC_CONSTANT(int, value = AUX778076_COUNT_ARGS_REPEAT(
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AUX778076_COUNT_ARGS_ARITY
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, AUX778076_COUNT_ARGS_FUNC
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, AUX778076_COUNT_ARGS_PARAM_NAME
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));
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};
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#undef AUX778076_COUNT_ARGS_FUNC
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#undef AUX778076_IS_ARG_TEMPLATE_NAME
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#undef AUX778076_COUNT_ARGS_PARAMS
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#undef AUX778076_COUNT_ARGS_REPEAT
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#undef AUX778076_COUNT_ARGS_ARITY
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#undef AUX778076_COUNT_ARGS_DEFAULT
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#undef AUX778076_COUNT_ARGS_PREFIX
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#undef AUX778076_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES
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#undef AUX778076_COUNT_ARGS_TEMPLATE_PARAM
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#undef AUX778076_COUNT_ARGS_PARAM_NAME
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