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1 | |
2 | #ifndef BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED | |
3 | #define BOOST_MPL_MAP_AUX_HAS_KEY_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/has_key_fwd.hpp> | |
19 | #include <boost/mpl/map/aux_/tag.hpp> | |
20 | #include <boost/mpl/map/aux_/at_impl.hpp> | |
21 | #include <boost/mpl/void.hpp> | |
22 | #include <boost/mpl/aux_/config/typeof.hpp> | |
23 | ||
24 | namespace boost { namespace mpl { | |
25 | ||
26 | template<> | |
27 | struct has_key_impl< aux::map_tag > | |
28 | { | |
29 | template< typename Map, typename Key > struct apply | |
30 | #if defined(BOOST_MPL_CFG_TYPEOF_BASED_SEQUENCES) | |
31 | : is_not_void_< | |
32 | typename at_impl<aux::map_tag> | |
33 | ::apply<Map,Key>::type | |
34 | > | |
35 | #else | |
36 | : bool_< ( x_order_impl<Map,Key>::value > 1 ) > | |
37 | #endif | |
38 | { | |
39 | }; | |
40 | }; | |
41 | ||
42 | }} | |
43 | ||
44 | #endif // BOOST_MPL_MAP_AUX_HAS_KEY_IMPL_HPP_INCLUDED |