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1 | |
2 | #ifndef BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED | |
3 | #define BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED | |
4 | ||
5 | // Copyright Aleksey Gurtovoy 2003-2004 | |
6 | // Copyright David Abrahams 2003-2004 | |
7 | // | |
8 | // Distributed under the Boost Software License, Version 1.0. | |
9 | // (See accompanying file LICENSE_1_0.txt or copy at | |
10 | // http://www.boost.org/LICENSE_1_0.txt) | |
11 | // | |
12 | // See http://www.boost.org/libs/mpl for documentation. | |
13 | ||
14 | // $Id$ | |
15 | // $Date$ | |
16 | // $Revision$ | |
17 | ||
18 | #include <boost/mpl/order_fwd.hpp> | |
19 | #include <boost/mpl/if.hpp> | |
20 | #include <boost/mpl/long.hpp> | |
21 | #include <boost/mpl/has_key.hpp> | |
22 | #include <boost/mpl/aux_/overload_names.hpp> | |
23 | #include <boost/mpl/aux_/static_cast.hpp> | |
24 | #include <boost/mpl/aux_/type_wrapper.hpp> | |
25 | #include <boost/mpl/aux_/traits_lambda_spec.hpp> | |
26 | #include <boost/mpl/aux_/config/msvc.hpp> | |
27 | #include <boost/mpl/aux_/config/static_constant.hpp> | |
28 | #include <boost/mpl/aux_/config/workaround.hpp> | |
29 | ||
30 | namespace boost { namespace mpl { | |
31 | ||
32 | // default implementation; requires 'Seq' to provide corresponding overloads | |
33 | // of BOOST_MPL_AUX_OVERLOAD_ORDER_BY_KEY | |
34 | ||
35 | template< typename Seq, typename Key > struct x_order_impl | |
36 | #if BOOST_WORKAROUND(BOOST_MSVC, BOOST_TESTED_AT(1400)) \ | |
37 | || BOOST_WORKAROUND(__EDG_VERSION__, <= 245) | |
38 | { | |
39 | BOOST_STATIC_CONSTANT(long, value = | |
40 | sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY( | |
41 | Seq | |
42 | , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0) | |
43 | ) ) | |
44 | ); | |
45 | ||
46 | typedef long_<value> type; | |
47 | ||
48 | #else // ISO98 C++ | |
49 | : long_< | |
50 | sizeof( BOOST_MPL_AUX_OVERLOAD_CALL_ORDER_BY_KEY( | |
51 | Seq | |
52 | , BOOST_MPL_AUX_STATIC_CAST(aux::type_wrapper<Key>*, 0) | |
53 | ) ) | |
54 | > | |
55 | { | |
56 | #endif | |
57 | }; | |
58 | ||
59 | template< typename Tag > | |
60 | struct order_impl | |
61 | { | |
62 | template< typename Seq, typename Key > struct apply | |
63 | : if_< | |
64 | typename has_key_impl<Tag>::template apply<Seq,Key> | |
65 | , x_order_impl<Seq,Key> | |
66 | , void_ | |
67 | >::type | |
68 | { | |
69 | }; | |
70 | }; | |
71 | ||
72 | BOOST_MPL_ALGORITM_TRAITS_LAMBDA_SPEC(2,order_impl) | |
73 | ||
74 | }} | |
75 | ||
76 | #endif // BOOST_MPL_AUX_ORDER_IMPL_HPP_INCLUDED |