100 lines
2.8 KiB
C++
100 lines
2.8 KiB
C++
//-----------------------------------------------------------------------------
|
|
// boost mpl/aux_/count_args.hpp header file
|
|
// See http://www.boost.org for updates, documentation, and revision history.
|
|
//-----------------------------------------------------------------------------
|
|
//
|
|
// Copyright (c) 2000-02
|
|
// Aleksey Gurtovoy
|
|
//
|
|
// 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)
|
|
|
|
// no include guards, the header is intended for multiple inclusion!
|
|
|
|
#include "boost/preprocessor/expr_if.hpp"
|
|
#include "boost/preprocessor/inc.hpp"
|
|
#include "boost/preprocessor/cat.hpp"
|
|
|
|
#if !defined(BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM)
|
|
# define BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM typename T
|
|
#endif
|
|
|
|
// local macros, #undef-ined at the end of the header
|
|
|
|
#if !defined(BOOST_MPL_AUX_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES)
|
|
|
|
# include "boost/mpl/aux_/preprocessor/repeat.hpp"
|
|
# include "boost/mpl/aux_/preprocessor/params.hpp"
|
|
|
|
# define AUX_COUNT_ARGS_REPEAT BOOST_MPL_PP_REPEAT
|
|
# define AUX_COUNT_ARGS_PARAMS(param) \
|
|
BOOST_MPL_PP_PARAMS( \
|
|
BOOST_MPL_AUX_COUNT_ARGS_ARITY \
|
|
, param \
|
|
) \
|
|
/**/
|
|
|
|
#else
|
|
|
|
# include "boost/preprocessor/enum_shifted_params.hpp"
|
|
# include "boost/preprocessor/repeat.hpp"
|
|
# include "boost/preprocessor/inc.hpp"
|
|
|
|
# define AUX_COUNT_ARGS_REPEAT BOOST_PP_REPEAT_1
|
|
# define AUX_COUNT_ARGS_PARAMS(param) \
|
|
BOOST_PP_ENUM_SHIFTED_PARAMS( \
|
|
BOOST_PP_INC(BOOST_MPL_AUX_COUNT_ARGS_ARITY) \
|
|
, param \
|
|
) \
|
|
/**/
|
|
|
|
#endif // BOOST_MPL_AUX_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES
|
|
|
|
|
|
#define AUX_IS_ARG_TEMPLATE_NAME \
|
|
BOOST_PP_CAT(is_,BOOST_PP_CAT(BOOST_MPL_AUX_COUNT_ARGS_PREFIX,_arg)) \
|
|
/**/
|
|
|
|
#define AUX_COUNT_ARGS_FUNC(unused, i, param) \
|
|
BOOST_PP_EXPR_IF(i, +) \
|
|
AUX_IS_ARG_TEMPLATE_NAME<BOOST_PP_CAT(param,BOOST_PP_INC(i))>::value \
|
|
/**/
|
|
|
|
// is_<xxx>_arg
|
|
template< BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM >
|
|
struct AUX_IS_ARG_TEMPLATE_NAME
|
|
{
|
|
BOOST_STATIC_CONSTANT(bool, value = true);
|
|
};
|
|
|
|
template<>
|
|
struct AUX_IS_ARG_TEMPLATE_NAME<BOOST_MPL_AUX_COUNT_ARGS_DEFAULT>
|
|
{
|
|
BOOST_STATIC_CONSTANT(bool, value = false);
|
|
};
|
|
|
|
// <xxx>_count_args
|
|
template<
|
|
AUX_COUNT_ARGS_PARAMS(BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM)
|
|
>
|
|
struct BOOST_PP_CAT(BOOST_MPL_AUX_COUNT_ARGS_PREFIX,_count_args)
|
|
{
|
|
BOOST_STATIC_CONSTANT(int, value = AUX_COUNT_ARGS_REPEAT(
|
|
BOOST_MPL_AUX_COUNT_ARGS_ARITY
|
|
, AUX_COUNT_ARGS_FUNC
|
|
, T
|
|
));
|
|
};
|
|
|
|
#undef AUX_COUNT_ARGS_FUNC
|
|
#undef AUX_IS_ARG_TEMPLATE_NAME
|
|
#undef AUX_COUNT_ARGS_PARAMS
|
|
#undef AUX_COUNT_ARGS_REPEAT
|
|
|
|
#undef BOOST_MPL_AUX_COUNT_ARGS_ARITY
|
|
#undef BOOST_MPL_AUX_COUNT_ARGS_DEFAULT
|
|
#undef BOOST_MPL_AUX_COUNT_ARGS_PREFIX
|
|
#undef BOOST_MPL_AUX_COUNT_ARGS_USE_STANDARD_PP_PRIMITIVES
|
|
#undef BOOST_MPL_AUX_COUNT_ARGS_TEMPLATE_PARAM
|