| |
| // 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/local_function |
| |
| #ifndef BOOST_LOCAL_FUNCTION_AUX_DECL_HPP_ |
| #define BOOST_LOCAL_FUNCTION_AUX_DECL_HPP_ |
| |
| #include <boost/local_function/aux_/macro/code_/result.hpp> |
| #include <boost/local_function/aux_/macro/code_/bind.hpp> |
| #include <boost/local_function/aux_/macro/code_/functor.hpp> |
| #include <boost/local_function/aux_/preprocessor/traits/decl.hpp> |
| #include <boost/local_function/aux_/preprocessor/traits/decl_error.hpp> |
| #include <boost/scope_exit.hpp> |
| #include <boost/mpl/assert.hpp> |
| #include <boost/preprocessor/control/iif.hpp> |
| #include <boost/preprocessor/facilities/is_empty.hpp> |
| #include <boost/preprocessor/list/adt.hpp> |
| #include <boost/preprocessor/tuple/eat.hpp> |
| |
| // PRIVATE // |
| |
| #define BOOST_LOCAL_FUNCTION_AUX_DECL_OK_(id, typename01, decl_traits) \ |
| BOOST_LOCAL_FUNCTION_AUX_CODE_RESULT(id, typename01, decl_traits) \ |
| BOOST_LOCAL_FUNCTION_AUX_CODE_BIND(id, typename01, decl_traits) \ |
| BOOST_LOCAL_FUNCTION_AUX_CODE_FUNCTOR(id, typename01, decl_traits) |
| |
| #define BOOST_LOCAL_FUNCTION_AUX_DECL_ERROR_(id, typename01, decl_traits) \ |
| BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS( \ |
| BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_RETURNS(decl_traits)), \ |
| /* return specified, so no result type before this macro expansion */ \ |
| BOOST_PP_TUPLE_EAT(1) \ |
| , \ |
| /* even if error, must declare result type to prevent additional */ \ |
| /* error due to result type appearing before this macro expansion */ \ |
| BOOST_LOCAL_FUNCTION_AUX_CODE_RESULT_DECL \ |
| )(id) \ |
| ; /* close eventual previous statements, otherwise it has no effect */ \ |
| BOOST_MPL_ASSERT_MSG(false, /* always fails (there's an error) */ \ |
| BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_ERROR_MSG(decl_traits), ())\ |
| ; /* must close ASSERT macro for eventual use within class scope */ |
| |
| // PUBLIC // |
| |
| #define BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR \ |
| BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (args) ) |
| |
| // Undefine local function bound args global variable. Actual declaration of |
| // this variable is made using SFINAE mechanisms by each local function macro. |
| extern boost::scope_exit::detail::undeclared |
| BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR; |
| |
| // sign_params: parsed parenthesized params. |
| #define BOOST_LOCAL_FUNCTION_AUX_DECL(id, typename01, decl_traits) \ |
| BOOST_PP_IIF(BOOST_PP_IS_EMPTY( \ |
| BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_ERROR_MSG(decl_traits)), \ |
| BOOST_LOCAL_FUNCTION_AUX_DECL_OK_ \ |
| , \ |
| BOOST_LOCAL_FUNCTION_AUX_DECL_ERROR_ \ |
| )(id, typename01, decl_traits) |
| |
| #endif // #include guard |
| |