1 // Copyright Daniel Wallin 2006. 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 6 #ifndef BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_ARITY_RANGE_HPP 7 #define BOOST_PARAMETER_AUX_PREPROCESSOR_IMPL_ARITY_RANGE_HPP 8 9 // Helper macros for BOOST_PARAMETER_ARITY_RANGE. 10 #define BOOST_PARAMETER_ARITY_RANGE_M_optional(state) state 11 #define BOOST_PARAMETER_ARITY_RANGE_M_deduced_optional(state) state 12 13 #include <boost/preprocessor/arithmetic/inc.hpp> 14 15 #define BOOST_PARAMETER_ARITY_RANGE_M_required(state) BOOST_PP_INC(state) 16 #define BOOST_PARAMETER_ARITY_RANGE_M_deduced_required(state) \ 17 BOOST_PP_INC(state) 18 /**/ 19 20 #include <boost/parameter/aux_/preprocessor/impl/argument_specs.hpp> 21 #include <boost/preprocessor/cat.hpp> 22 23 #define BOOST_PARAMETER_ARITY_RANGE_M(s, state, x) \ 24 BOOST_PP_CAT( \ 25 BOOST_PARAMETER_ARITY_RANGE_M_ \ 26 , BOOST_PARAMETER_FN_ARG_QUALIFIER(x) \ 27 )(state) 28 /**/ 29 30 #include <boost/preprocessor/seq/fold_left.hpp> 31 #include <boost/preprocessor/seq/size.hpp> 32 33 // Calculates [begin, end) arity range. 34 #define BOOST_PARAMETER_ARITY_RANGE(args) \ 35 ( \ 36 BOOST_PP_SEQ_FOLD_LEFT(BOOST_PARAMETER_ARITY_RANGE_M, 0, args) \ 37 , BOOST_PP_INC(BOOST_PP_SEQ_SIZE(args)) \ 38 ) 39 /**/ 40 41 #endif // include guard 42 43