| |
| // Copyright (C) 2009-2012 Lorenzo Caminiti |
| // Distributed under the Boost Software License, Version 1.0 |
| // (see accompanying file LICENSE_1_0.txt or a copy at |
| // http://www.boost.org/LICENSE_1_0.txt) |
| // Home at http://www.boost.org/libs/functional/overloaded_function |
| |
| #if !BOOST_PP_IS_ITERATING |
| # ifndef BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_DETAIL_BASE_HPP_ |
| # define BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_DETAIL_BASE_HPP_ |
| |
| # include <ndnboost/functional/overloaded_function/config.hpp> |
| # include <ndnboost/function.hpp> |
| # include <ndnboost/preprocessor/iteration/iterate.hpp> |
| # include <ndnboost/preprocessor/repetition/enum.hpp> |
| # include <ndnboost/preprocessor/cat.hpp> |
| # include <ndnboost/preprocessor/comma_if.hpp> |
| |
| #define BOOST_FUNCTIONAL_DETAIL_arg_type(z, n, unused) \ |
| BOOST_PP_CAT(A, n) |
| |
| #define BOOST_FUNCTIONAL_DETAIL_arg_name(z, n, unused) \ |
| BOOST_PP_CAT(a, n) |
| |
| #define BOOST_FUNCTIONAL_DETAIL_arg_tparam(z, n, unused) \ |
| typename BOOST_FUNCTIONAL_DETAIL_arg_type(z, n, unused) |
| |
| #define BOOST_FUNCTIONAL_DETAIL_arg(z, n, unused) \ |
| BOOST_FUNCTIONAL_DETAIL_arg_type(z, n, unused) \ |
| BOOST_FUNCTIONAL_DETAIL_arg_name(z, n, unused) |
| |
| #define BOOST_FUNCTIONAL_DETAIL_f \ |
| R (BOOST_PP_ENUM(BOOST_FUNCTIONAL_DETAIL_arity, \ |
| BOOST_FUNCTIONAL_DETAIL_arg_type, ~)) |
| |
| // Do not use namespace ::detail because overloaded_function is already a class. |
| namespace ndnboost { namespace overloaded_function_detail { |
| |
| template<typename F> |
| class base {}; // Empty template cannot be used directly (only its spec). |
| |
| # define BOOST_PP_ITERATION_PARAMS_1 \ |
| (3, (0, BOOST_FUNCTIONAL_OVERLOADED_FUNCTION_CONFIG_ARITY_MAX, \ |
| "ndnboost/functional/overloaded_function/detail/base.hpp")) |
| # include BOOST_PP_ITERATE() // Iterate over funciton arity. |
| |
| } } // namespace |
| |
| #undef BOOST_FUNCTIONAL_DETAIL_arg_type |
| #undef BOOST_FUNCTIONAL_DETAIL_arg_name |
| #undef BOOST_FUNCTIONAL_DETAIL_arg_tparam |
| #undef BOOST_FUNCTIONAL_DETAIL_arg |
| #undef BOOST_FUNCTIONAL_DETAIL_f |
| |
| # endif // #include guard |
| |
| #elif BOOST_PP_ITERATION_DEPTH() == 1 |
| # define BOOST_FUNCTIONAL_DETAIL_arity BOOST_PP_FRAME_ITERATION(1) |
| |
| template< |
| typename R |
| BOOST_PP_COMMA_IF(BOOST_FUNCTIONAL_DETAIL_arity) |
| BOOST_PP_ENUM(BOOST_FUNCTIONAL_DETAIL_arity, |
| BOOST_FUNCTIONAL_DETAIL_arg_tparam, ~) |
| > |
| class base< BOOST_FUNCTIONAL_DETAIL_f > { |
| public: |
| /* implicit */ inline base( |
| // This requires specified type to be implicitly convertible to |
| // a ndnboost::function<> functor. |
| ndnboost::function< BOOST_FUNCTIONAL_DETAIL_f > const& f): f_(f) |
| {} |
| |
| inline R operator()(BOOST_PP_ENUM(BOOST_FUNCTIONAL_DETAIL_arity, |
| BOOST_FUNCTIONAL_DETAIL_arg, ~)) const { |
| return f_(BOOST_PP_ENUM(BOOST_FUNCTIONAL_DETAIL_arity, |
| BOOST_FUNCTIONAL_DETAIL_arg_name, ~)); |
| } |
| |
| private: |
| ndnboost::function< BOOST_FUNCTIONAL_DETAIL_f > const f_; |
| }; |
| |
| # undef BOOST_FUNCTIONAL_DETAIL_arity |
| #endif // iteration |
| |