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Diffstat (limited to 'boost/parameter/aux_/preprocessor/impl/split_args.hpp')
| -rw-r--r-- | boost/parameter/aux_/preprocessor/impl/split_args.hpp | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/boost/parameter/aux_/preprocessor/impl/split_args.hpp b/boost/parameter/aux_/preprocessor/impl/split_args.hpp new file mode 100644 index 0000000000..bfda33b393 --- /dev/null +++ b/boost/parameter/aux_/preprocessor/impl/split_args.hpp @@ -0,0 +1,71 @@ +// Copyright Daniel Wallin 2006. +// 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) + +#ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_SPLIT_ARGS_HPP +#define BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_SPLIT_ARGS_HPP + +#include <boost/preprocessor/tuple/elem.hpp> + +// Accessor macros for the split_args tuple. +#define BOOST_PARAMETER_SPLIT_ARG_REQ_COUNT(x) BOOST_PP_TUPLE_ELEM(4, 0, x) +#define BOOST_PARAMETER_SPLIT_ARG_REQ_SEQ(x) BOOST_PP_TUPLE_ELEM(4, 1, x) +#define BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT(x) BOOST_PP_TUPLE_ELEM(4, 2, x) +#define BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ(x) BOOST_PP_TUPLE_ELEM(4, 3, x) + +#include <boost/preprocessor/arithmetic/inc.hpp> +#include <boost/preprocessor/seq/push_back.hpp> + +// Helper macros for BOOST_PARAMETER_FUNCTION_SPLIT_ARGS. +#define BOOST_PARAMETER_FUNCTION_SPLIT_ARG_required(s_a, arg) \ + ( \ + BOOST_PP_INC(BOOST_PARAMETER_SPLIT_ARG_REQ_COUNT(s_a)) \ + , BOOST_PP_SEQ_PUSH_BACK(BOOST_PARAMETER_SPLIT_ARG_REQ_SEQ(s_a), arg) \ + , BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT(s_a) \ + , BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ(s_a) \ + ) +/**/ + +#define BOOST_PARAMETER_FUNCTION_SPLIT_ARG_deduced_required(split_args, arg) \ + BOOST_PARAMETER_FUNCTION_SPLIT_ARG_required(split_args, arg) +/**/ + +#define BOOST_PARAMETER_FUNCTION_SPLIT_ARG_optional(s_a, arg) \ + ( \ + BOOST_PARAMETER_SPLIT_ARG_REQ_COUNT(s_a) \ + , BOOST_PARAMETER_SPLIT_ARG_REQ_SEQ(s_a) \ + , BOOST_PP_INC(BOOST_PARAMETER_SPLIT_ARG_OPT_COUNT(s_a)) \ + , BOOST_PP_SEQ_PUSH_BACK(BOOST_PARAMETER_SPLIT_ARG_OPT_SEQ(s_a), arg) \ + ) +/**/ + +#define BOOST_PARAMETER_FUNCTION_SPLIT_ARG_deduced_optional(split_args, arg) \ + BOOST_PARAMETER_FUNCTION_SPLIT_ARG_optional(split_args, arg) +/**/ + +#include <boost/parameter/aux_/preprocessor/impl/argument_specs.hpp> +#include <boost/preprocessor/cat.hpp> + +#define BOOST_PARAMETER_FUNCTION_SPLIT_ARG(s, split_args, arg) \ + BOOST_PP_CAT( \ + BOOST_PARAMETER_FUNCTION_SPLIT_ARG_ \ + , BOOST_PARAMETER_FN_ARG_QUALIFIER(arg) \ + )(split_args, arg) +/**/ + +#include <boost/preprocessor/seq/fold_left.hpp> +#include <boost/preprocessor/seq/seq.hpp> + +// Expands from the flattened BOOST_PARAMETER_FUNCTION et. al. arg sequence to +// the tuple (required_count, required_args, optional_count, optional_args). +#define BOOST_PARAMETER_FUNCTION_SPLIT_ARGS(args) \ + BOOST_PP_SEQ_FOLD_LEFT( \ + BOOST_PARAMETER_FUNCTION_SPLIT_ARG \ + , (0, BOOST_PP_SEQ_NIL, 0, BOOST_PP_SEQ_NIL) \ + , args \ + ) +/**/ + +#endif // include guard + |