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 | |
70 | |