forked from boostorg/mpl
104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/aux_/count_args.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2000-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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// no include guards, the header is intended for multiple inclusion!
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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(BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM)
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# define BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM typename T
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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(BOOST_MPL_AUX_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 AUX_COUNT_ARGS_REPEAT BOOST_MPL_PP_REPEAT
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# define AUX_COUNT_ARGS_PARAMS(param) \
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BOOST_MPL_PP_PARAMS( \
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BOOST_MPL_AUX_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 AUX_COUNT_ARGS_REPEAT BOOST_PP_REPEAT_1
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# define AUX_COUNT_ARGS_PARAMS(param) \
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BOOST_PP_ENUM_SHIFTED_PARAMS( \
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BOOST_PP_INC(BOOST_MPL_AUX_COUNT_ARGS_ARITY) \
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, param \
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) \
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/**/
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#endif // BOOST_MPL_AUX_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES
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#define AUX_IS_ARG_TEMPLATE_NAME \
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BOOST_PP_CAT(is_,BOOST_PP_CAT(BOOST_MPL_AUX_COUNT_ARGS_PREFIX,_arg)) \
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/**/
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#define AUX_COUNT_ARGS_FUNC(unused, i, param) \
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BOOST_PP_EXPR_IF(i, +) \
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AUX_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< BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM >
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struct AUX_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 AUX_IS_ARG_TEMPLATE_NAME<BOOST_MPL_AUX_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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AUX_COUNT_ARGS_PARAMS(BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM)
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>
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struct BOOST_PP_CAT(BOOST_MPL_AUX_COUNT_ARGS_PREFIX,_count_args)
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{
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BOOST_STATIC_CONSTANT(int, value = AUX_COUNT_ARGS_REPEAT(
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BOOST_MPL_AUX_COUNT_ARGS_ARITY
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, AUX_COUNT_ARGS_FUNC
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, T
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));
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};
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#undef AUX_COUNT_ARGS_FUNC
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#undef AUX_IS_ARG_TEMPLATE_NAME
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#undef AUX_COUNT_ARGS_PARAMS
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#undef AUX_COUNT_ARGS_REPEAT
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#undef BOOST_MPL_AUX_COUNT_ARGS_ARITY
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#undef BOOST_MPL_AUX_COUNT_ARGS_DEFAULT
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#undef BOOST_MPL_AUX_COUNT_ARGS_PREFIX
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#undef BOOST_MPL_AUX_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES
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#undef BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM
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