boost/parameter/macros.hpp
// Copyright David Abrahams, Daniel Wallin 2003. // Copyright Cromwell D. Enage 2017. // 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_MACROS_050412_HPP #define BOOST_PARAMETER_MACROS_050412_HPP #include <boost/parameter/config.hpp> #include <boost/preprocessor/repetition/enum_params.hpp> #if !defined(BOOST_NO_SFINAE) && \ !BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x592)) #define BOOST_PARAMETER_MATCH_TYPE(n, param) \ , typename param::match<BOOST_PP_ENUM_PARAMS(n, T)>::type kw = param() /**/ #define BOOST_PARAMETER_MATCH_TYPE_Z(z, n, param) \ , typename param::match<BOOST_PP_ENUM_PARAMS_Z(z, n, T)>::type kw = param() /**/ #else // SFINAE disbled, or Borland workarounds needed. #define BOOST_PARAMETER_MATCH_TYPE(n, param) , param kw = param() /**/ #define BOOST_PARAMETER_MATCH_TYPE_Z(z, n, param) , param kw = param() /**/ #endif // SFINAE enabled, not Borland. #include <boost/preprocessor/control/if.hpp> #include <boost/preprocessor/repetition/enum_binary_params.hpp> #include <boost/preprocessor/tuple/elem.hpp> #include <boost/preprocessor/cat.hpp> #if defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) #define BOOST_PARAMETER_FUN_0(z, n, params) \ BOOST_PP_TUPLE_ELEM(3, 0, params) BOOST_PP_TUPLE_ELEM(3, 1, params)() \ { \ return BOOST_PP_CAT( \ BOOST_PP_TUPLE_ELEM(3, 1, params) \ , _with_named_params \ )(BOOST_PP_TUPLE_ELEM(3, 2, params)()()); \ } /**/ #include <utility> #define BOOST_PARAMETER_FUN_DECL_PARAM(z, n, p) \ ::std::forward<BOOST_PP_CAT(T, n)>(BOOST_PP_CAT(p, n)) /**/ #include <boost/preprocessor/repetition/enum.hpp> #define BOOST_PARAMETER_FUN_DEFN_1(z, n, params) \ template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename T)> \ BOOST_PP_TUPLE_ELEM(3, 0, params) \ BOOST_PP_TUPLE_ELEM(3, 1, params)( \ BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, T, && p) \ BOOST_PARAMETER_MATCH_TYPE_Z( \ z, n, BOOST_PP_TUPLE_ELEM(3, 2, params) \ ) \ ) \ { \ return BOOST_PP_CAT( \ BOOST_PP_TUPLE_ELEM(3, 1, params) \ , _with_named_params \ )( \ kw( \ BOOST_PP_CAT(BOOST_PP_ENUM_, z)( \ n, BOOST_PARAMETER_FUN_DECL_PARAM, p \ ) \ ) \ ); \ } /**/ #define BOOST_PARAMETER_FUN_DECL(z, n, params) \ BOOST_PP_IF( \ n \ , BOOST_PARAMETER_FUN_DEFN_1 \ , BOOST_PARAMETER_FUN_0 \ )(z, n, params) /**/ #else // !defined(BOOST_PARAMETER_HAS_PERFECT_FORWARDING) #define BOOST_PARAMETER_FUN_DEFN_0(z, n, params) \ template <BOOST_PP_ENUM_PARAMS_Z(z, n, typename T)> \ BOOST_PP_TUPLE_ELEM(3, 0, params) \ BOOST_PP_TUPLE_ELEM(3, 1, params)( \ BOOST_PP_ENUM_BINARY_PARAMS_Z(z, n, T, const& p) \ BOOST_PARAMETER_MATCH_TYPE_Z( \ z, n, BOOST_PP_TUPLE_ELEM(3, 2, params) \ ) \ ) \ { \ return BOOST_PP_CAT( \ BOOST_PP_TUPLE_ELEM(3, 1, params) \ , _with_named_params \ )(kw(BOOST_PP_ENUM_PARAMS_Z(z, n, p))); \ } /**/ #include <boost/preprocessor/seq/seq.hpp> #define BOOST_PARAMETER_FUN_0(z, n, seq) \ BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq))) \ BOOST_PP_TUPLE_ELEM(3, 1, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq)))() \ { \ return BOOST_PP_CAT( \ BOOST_PP_TUPLE_ELEM( \ 3, 1, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq)) \ ) \ , _with_named_params \ )( \ BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(seq))) \ ()() \ ); \ } /**/ #include <boost/parameter/aux_/preprocessor/binary_seq_to_args.hpp> #include <boost/preprocessor/seq/size.hpp> #define BOOST_PARAMETER_FUN_DEFN_R(r, seq) \ template < \ BOOST_PP_ENUM_PARAMS( \ BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_TAIL(seq)) \ , typename T \ ) \ > BOOST_PP_TUPLE_ELEM(3, 0, BOOST_PP_SEQ_HEAD(seq)) \ BOOST_PP_TUPLE_ELEM(3, 1, BOOST_PP_SEQ_HEAD(seq))( \ BOOST_PARAMETER_AUX_PP_BINARY_SEQ_TO_ARGS( \ BOOST_PP_SEQ_TAIL(seq), (T)(p) \ ) \ BOOST_PARAMETER_MATCH_TYPE( \ BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_TAIL(seq)) \ , BOOST_PP_TUPLE_ELEM(3, 2, BOOST_PP_SEQ_HEAD(seq)) \ ) \ ) \ { \ return BOOST_PP_CAT( \ BOOST_PP_TUPLE_ELEM(3, 1, BOOST_PP_SEQ_HEAD(seq)) \ , _with_named_params \ )( \ kw( \ BOOST_PP_ENUM_PARAMS( \ BOOST_PP_SEQ_SIZE(BOOST_PP_SEQ_TAIL(seq)), p \ ) \ ) \ ); \ } /**/ #include <boost/parameter/aux_/preprocessor/binary_seq_for_each.hpp> #include <boost/preprocessor/tuple/eat.hpp> #define BOOST_PARAMETER_FUN_DEFN_1(z, n, params) \ BOOST_PP_IF( \ n \ , BOOST_PARAMETER_AUX_PP_BINARY_SEQ_FOR_EACH_Z \ , BOOST_PARAMETER_FUN_0 \ )(z, n, (BOOST_PARAMETER_FUN_DEFN_R)(params)) /**/ #include <boost/preprocessor/comparison/less.hpp> #define BOOST_PARAMETER_FUN_DECL(z, n, params) \ BOOST_PP_CAT( \ BOOST_PARAMETER_FUN_DEFN_ \ , BOOST_PP_LESS( \ n \ , BOOST_PARAMETER_EXPONENTIAL_OVERLOAD_THRESHOLD_ARITY \ ) \ )(z, n, params) /**/ #endif // BOOST_PARAMETER_HAS_PERFECT_FORWARDING #include <boost/preprocessor/arithmetic/inc.hpp> #include <boost/preprocessor/repetition/repeat_from_to.hpp> // Generates: // // template <typename Params> // ret name ## _with_named_params(Params const&); // // template <typename T0> // ret name( // T0 && p0 // , typename parameters::match<T0>::type kw = parameters() // ) // { // return name ## _with_named_params(kw(p0)); // } // // template <typename T0, ..., typename T ## N> // ret name( // T0 && p0, ..., TN && p ## N // , typename parameters::match<T0, ..., T ## N>::type kw = parameters() // ) // { // return name ## _with_named_params(kw(p0, ..., p ## N)); // } // // template <typename Params> // ret name ## _with_named_params(Params const&) // // lo and hi determine the min and max arities of the generated functions. #define BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters) \ BOOST_PP_REPEAT_FROM_TO( \ lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL \ , (ret, name, parameters) \ ) \ template <typename Params> \ ret BOOST_PP_CAT(name, _with_named_params)(Params const& p) /**/ #define BOOST_PARAMETER_FUN(ret, name, lo, hi, parameters) \ template <typename Params> \ ret BOOST_PP_CAT(name, _with_named_params)(Params const& p); \ BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters) /**/ #endif // include guard