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