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- // (C) Copyright Tobias Schwinger
- //
- // Use modification and distribution are subject to the boost Software License,
- // Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt).
- //------------------------------------------------------------------------------
- // no include guards, this file is intended for multiple inclusion
- #ifndef BOOST_FT_PREPROCESSING_MODE
- // input: BOOST_FT_mfp 0 or 1 <=> member function pointer?
- // input: BOOST_FT_type_name BOOST_FT_type --> "R (* ..._type_name)()" (pass2)
- #endif
- // input: BOOST_FT_syntax type macro to use
- // input: BOOST_FT_cc empty or cc specifier
- // input: BOOST_FT_ell empty or "..."
- // input: BOOST_FT_cv empty or cv qualifiers
- // input: BOOST_FT_flags single decimal integer encoding the flags
- // output: BOOST_FT_n number of component types (arity+1)
- // output: BOOST_FT_arity current arity
- // output: BOOST_FT_type macro that expands to the type
- // output: BOOST_FT_tplargs(p) template arguments with given prefix
- // output: BOOST_FT_params(p) parameters with given prefix
- #ifdef __WAVE__
- # pragma wave option(preserve: 0)
- #endif
- #ifndef BOOST_FT_ARITY_LOOP_IS_ITERATING
- # define BOOST_FT_AL_PREPROCESSED \
- BOOST_FT_AL_FILE(BOOST_FT_al_path,BOOST_FT_FROM_ARITY,BOOST_FT_mfp)
- # define BOOST_FT_AL_FILE(base_path,max_arity,mfp) \
- BOOST_FT_AL_FILE_I(base_path,max_arity,mfp)
- # define BOOST_FT_AL_FILE_I(base_path,max_arity,mfp) \
- <base_path/arity ## max_arity ## _ ## mfp.hpp>
- # if !defined(BOOST_FT_PREPROCESSING_MODE)
- # if BOOST_FT_MAX_ARITY < 10
- # define BOOST_FT_FROM_ARITY 0
- # elif BOOST_FT_MAX_ARITY < 20
- # define BOOST_FT_FROM_ARITY 10
- # elif BOOST_FT_MAX_ARITY < 30
- # define BOOST_FT_FROM_ARITY 20
- # elif BOOST_FT_MAX_ARITY < 40
- # define BOOST_FT_FROM_ARITY 30
- # endif
- # if BOOST_FT_FROM_ARITY
- # include BOOST_FT_AL_PREPROCESSED
- # endif
- # elif !defined(BOOST_FT_FROM_ARITY) // single pass preprocessing
- # define BOOST_FT_FROM_ARITY 0
- # elif BOOST_FT_FROM_ARITY > 0 // arity20 includes arity10
- BOOST_PP_EXPAND(#) include BOOST_FT_AL_PREPROCESSED
- # endif
- # undef BOOST_FT_AL_PREPROCESSED
- # undef BOOST_FT_AL_FILE
- # undef BOOST_FT_AL_FILE_I
- # if BOOST_FT_MAX_ARITY > BOOST_FT_FROM_ARITY
- # ifndef BOOST_FT_DETAIL_ARITY_LOOP_HPP_INCLUDED
- # define BOOST_FT_DETAIL_ARITY_LOOP_HPP_INCLUDED
- # include <boost/preprocessor/cat.hpp>
- # include <boost/preprocessor/tuple/eat.hpp>
- # include <boost/preprocessor/control/if.hpp>
- # include <boost/preprocessor/arithmetic/inc.hpp>
- # include <boost/preprocessor/facilities/empty.hpp>
- # include <boost/preprocessor/facilities/expand.hpp>
- # include <boost/preprocessor/iteration/iterate.hpp>
- # include <boost/preprocessor/repetition/enum_params.hpp>
- # include <boost/preprocessor/repetition/enum_shifted_params.hpp>
- # include <boost/preprocessor/repetition/enum_trailing_params.hpp>
- # endif
- # define BOOST_FT_AL_INCLUDE_FILE <BOOST_FT_al_path/master.hpp>
- # define BOOST_FT_ARITY_LOOP_PREFIX 1
- # include BOOST_FT_AL_INCLUDE_FILE
- # undef BOOST_FT_ARITY_LOOP_PREFIX
- # if !BOOST_PP_IS_ITERATING
- # define BOOST_PP_FILENAME_1 BOOST_FT_AL_INCLUDE_FILE
- # elif BOOST_PP_ITERATION_DEPTH() == 1
- # define BOOST_PP_FILENAME_2 BOOST_FT_AL_INCLUDE_FILE
- # else
- # error "loops nested too deeply"
- # endif
- # define BOOST_FT_arity BOOST_PP_ITERATION()
- # define BOOST_FT_n BOOST_PP_INC(BOOST_FT_arity)
- # define BOOST_FT_type \
- BOOST_FT_syntax(BOOST_FT_cc,BOOST_FT_type_name BOOST_PP_EMPTY)\
- (BOOST_FT_params(BOOST_PP_EMPTY) BOOST_FT_ell) BOOST_FT_cv
- # define BOOST_FT_tplargs(prefx) \
- prefx() R BOOST_PP_ENUM_TRAILING_PARAMS(BOOST_FT_arity,prefx() T)
- # if !BOOST_FT_mfp
- # define BOOST_FT_params(prefx) \
- BOOST_PP_IF(BOOST_FT_arity,BOOST_PP_ENUM_PARAMS, \
- BOOST_FT_nullary_param BOOST_PP_TUPLE_EAT(2))( \
- BOOST_FT_arity,prefx() T)
- # else
- # define BOOST_FT_params(prefx) \
- BOOST_PP_ENUM_SHIFTED_PARAMS(BOOST_FT_arity,prefx() T)
- # endif
- # if !BOOST_FT_FROM_ARITY
- # define BOOST_PP_ITERATION_LIMITS (BOOST_FT_mfp, BOOST_FT_MAX_ARITY)
- # else
- # define BOOST_PP_ITERATION_LIMITS \
- (BOOST_FT_FROM_ARITY+1, BOOST_FT_MAX_ARITY)
- # endif
- # define BOOST_FT_ARITY_LOOP_IS_ITERATING 1
- # include BOOST_PP_ITERATE()
- # undef BOOST_FT_ARITY_LOOP_IS_ITERATING
- # undef BOOST_FT_arity
- # undef BOOST_FT_params
- # undef BOOST_FT_tplargs
- # undef BOOST_FT_type
- # define BOOST_FT_ARITY_LOOP_SUFFIX 1
- # include BOOST_FT_AL_INCLUDE_FILE
- # undef BOOST_FT_ARITY_LOOP_SUFFIX
- # undef BOOST_FT_AL_INCLUDE_FILE
- # endif
- # undef BOOST_FT_FROM_ARITY
- #else
- # error "attempt to nest arity loops"
- #endif
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