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 |
77 | |