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Diffstat (limited to 'boost/parameter/aux_/preprocessor/impl/arity_range.hpp')
| -rw-r--r-- | boost/parameter/aux_/preprocessor/impl/arity_range.hpp | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/boost/parameter/aux_/preprocessor/impl/arity_range.hpp b/boost/parameter/aux_/preprocessor/impl/arity_range.hpp new file mode 100644 index 0000000000..848648e4cc --- /dev/null +++ b/boost/parameter/aux_/preprocessor/impl/arity_range.hpp @@ -0,0 +1,42 @@ +// 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_ARITY_RANGE_HPP +#define BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_ARITY_RANGE_HPP + +// Helper macros for BOOST_PARAMETER_ARITY_RANGE. +#define BOOST_PARAMETER_ARITY_RANGE_M_optional(state) state +#define BOOST_PARAMETER_ARITY_RANGE_M_deduced_optional(state) state + +#include <boost/preprocessor/arithmetic/inc.hpp> + +#define BOOST_PARAMETER_ARITY_RANGE_M_required(state) BOOST_PP_INC(state) +#define BOOST_PARAMETER_ARITY_RANGE_M_deduced_required(state) \ + BOOST_PP_INC(state) +/**/ + +#include <boost/parameter/aux_/preprocessor/impl/argument_specs.hpp> +#include <boost/preprocessor/cat.hpp> + +#define BOOST_PARAMETER_ARITY_RANGE_M(s, state, x) \ + BOOST_PP_CAT( \ + BOOST_PARAMETER_ARITY_RANGE_M_ \ + , BOOST_PARAMETER_FN_ARG_QUALIFIER(x) \ + )(state) +/**/ + +#include <boost/preprocessor/seq/fold_left.hpp> +#include <boost/preprocessor/seq/size.hpp> + +// Calculates [begin, end) arity range. +#define BOOST_PARAMETER_ARITY_RANGE(args) \ + ( \ + BOOST_PP_SEQ_FOLD_LEFT(BOOST_PARAMETER_ARITY_RANGE_M, 0, args) \ + , BOOST_PP_INC(BOOST_PP_SEQ_SIZE(args)) \ + ) +/**/ + +#endif // include guard + |