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2 | // Copyright (C) 2009-2012 Lorenzo Caminiti | |
3 | // Distributed under the Boost Software License, Version 1.0 | |
4 | // (see accompanying file LICENSE_1_0.txt or a copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt) | |
6 | // Home at http://www.boost.org/libs/local_function | |
7 | ||
8 | #ifndef BOOST_LOCAL_FUNCTION_AUX_DECL_HPP_ | |
9 | #define BOOST_LOCAL_FUNCTION_AUX_DECL_HPP_ | |
10 | ||
11 | #include <boost/local_function/aux_/macro/code_/result.hpp> | |
12 | #include <boost/local_function/aux_/macro/code_/bind.hpp> | |
13 | #include <boost/local_function/aux_/macro/code_/functor.hpp> | |
14 | #include <boost/local_function/aux_/preprocessor/traits/decl.hpp> | |
15 | #include <boost/local_function/aux_/preprocessor/traits/decl_error.hpp> | |
16 | #include <boost/scope_exit.hpp> | |
17 | #include <boost/mpl/assert.hpp> | |
18 | #include <boost/preprocessor/control/iif.hpp> | |
19 | #include <boost/preprocessor/facilities/is_empty.hpp> | |
20 | #include <boost/preprocessor/list/adt.hpp> | |
21 | #include <boost/preprocessor/tuple/eat.hpp> | |
22 | ||
23 | // PRIVATE // | |
24 | ||
25 | #define BOOST_LOCAL_FUNCTION_AUX_DECL_OK_(id, typename01, decl_traits) \ | |
26 | BOOST_LOCAL_FUNCTION_AUX_CODE_RESULT(id, typename01, decl_traits) \ | |
27 | BOOST_LOCAL_FUNCTION_AUX_CODE_BIND(id, typename01, decl_traits) \ | |
28 | BOOST_LOCAL_FUNCTION_AUX_CODE_FUNCTOR(id, typename01, decl_traits) | |
29 | ||
30 | #define BOOST_LOCAL_FUNCTION_AUX_DECL_ERROR_(id, typename01, decl_traits) \ | |
31 | BOOST_PP_IIF(BOOST_PP_LIST_IS_CONS( \ | |
32 | BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_RETURNS(decl_traits)), \ | |
33 | /* return specified, so no result type before this macro expansion */ \ | |
34 | BOOST_PP_TUPLE_EAT(1) \ | |
35 | , \ | |
36 | /* even if error, must declare result type to prevent additional */ \ | |
37 | /* error due to result type appearing before this macro expansion */ \ | |
38 | BOOST_LOCAL_FUNCTION_AUX_CODE_RESULT_DECL \ | |
39 | )(id) \ | |
40 | ; /* close eventual previous statements, otherwise it has no effect */ \ | |
41 | BOOST_MPL_ASSERT_MSG(false, /* always fails (there's an error) */ \ | |
42 | BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_ERROR_MSG(decl_traits), ())\ | |
43 | ; /* must close ASSERT macro for eventual use within class scope */ | |
44 | ||
45 | // PUBLIC // | |
46 | ||
47 | #define BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR \ | |
48 | BOOST_LOCAL_FUNCTION_AUX_SYMBOL( (args) ) | |
49 | ||
50 | // Undefine local function bound args global variable. Actual declaration of | |
51 | // this variable is made using SFINAE mechanisms by each local function macro. | |
52 | extern boost::scope_exit::detail::undeclared | |
53 | BOOST_LOCAL_FUNCTION_AUX_DECL_ARGS_VAR; | |
54 | ||
55 | // sign_params: parsed parenthesized params. | |
56 | #define BOOST_LOCAL_FUNCTION_AUX_DECL(id, typename01, decl_traits) \ | |
57 | BOOST_PP_IIF(BOOST_PP_IS_EMPTY( \ | |
58 | BOOST_LOCAL_FUNCTION_AUX_PP_DECL_TRAITS_ERROR_MSG(decl_traits)), \ | |
59 | BOOST_LOCAL_FUNCTION_AUX_DECL_OK_ \ | |
60 | , \ | |
61 | BOOST_LOCAL_FUNCTION_AUX_DECL_ERROR_ \ | |
62 | )(id, typename01, decl_traits) | |
63 | ||
64 | #endif // #include guard | |
65 |