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1 | /*============================================================================= |
2 | Copyright (c) 2007 Tobias Schwinger | |
3 | ||
4 | Use modification and distribution are subject to the Boost Software | |
5 | License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
6 | http://www.boost.org/LICENSE_1_0.txt). | |
7 | ==============================================================================*/ | |
8 | ||
9 | #ifndef BOOST_FUNCTIONAL_VALUE_FACTORY_HPP_INCLUDED | |
10 | # ifndef BOOST_PP_IS_ITERATING | |
11 | ||
12 | # include <boost/preprocessor/iteration/iterate.hpp> | |
13 | # include <boost/preprocessor/repetition/enum_params.hpp> | |
14 | # include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
15 | ||
16 | # include <new> | |
17 | # include <boost/pointee.hpp> | |
18 | # include <boost/get_pointer.hpp> | |
19 | # include <boost/non_type.hpp> | |
20 | # include <boost/type_traits/remove_cv.hpp> | |
21 | ||
22 | # ifndef BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY | |
23 | # define BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY 10 | |
24 | # elif BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY < 3 | |
25 | # undef BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY | |
26 | # define BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY 3 | |
27 | # endif | |
28 | ||
29 | namespace boost | |
30 | { | |
31 | template< typename T > | |
32 | class value_factory; | |
33 | ||
34 | //----- ---- --- -- - - - - | |
35 | ||
36 | template< typename T > | |
37 | class value_factory | |
38 | { | |
39 | public: | |
40 | typedef T result_type; | |
41 | ||
42 | value_factory() | |
43 | { } | |
44 | ||
45 | # define BOOST_PP_FILENAME_1 <boost/functional/value_factory.hpp> | |
46 | # define BOOST_PP_ITERATION_LIMITS (0,BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY) | |
47 | # include BOOST_PP_ITERATE() | |
48 | }; | |
49 | ||
50 | template< typename T > class value_factory<T&>; | |
51 | // forbidden, would create a dangling reference | |
52 | } | |
53 | # define BOOST_FUNCTIONAL_VALUE_FACTORY_HPP_INCLUDED | |
54 | # else // defined(BOOST_PP_IS_ITERATING) | |
55 | ||
56 | # define N BOOST_PP_ITERATION() | |
57 | # if N > 0 | |
58 | template< BOOST_PP_ENUM_PARAMS(N, typename T) > | |
59 | # endif | |
60 | inline result_type operator()(BOOST_PP_ENUM_BINARY_PARAMS(N,T,& a)) const | |
61 | { | |
62 | return result_type(BOOST_PP_ENUM_PARAMS(N,a)); | |
63 | } | |
64 | # undef N | |
65 | ||
66 | # endif // defined(BOOST_PP_IS_ITERATING) | |
67 | ||
68 | #endif // include guard | |
69 |