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105 lines
3.0 KiB
105 lines
3.0 KiB
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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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