1 # /* Copyright (C) 2001 |
1 |
2 # * Housemarque Oy |
2 #ifndef BOOST_MPL_AT_HPP_INCLUDED |
3 # * http://www.housemarque.com |
3 #define BOOST_MPL_AT_HPP_INCLUDED |
4 # * |
4 |
5 # * Distributed under the Boost Software License, Version 1.0. (See |
5 // Copyright Aleksey Gurtovoy 2000-2004 |
6 # * accompanying file LICENSE_1_0.txt or copy at |
6 // |
7 # * http://www.boost.org/LICENSE_1_0.txt) |
7 // Distributed under the Boost Software License, Version 1.0. |
8 # */ |
8 // (See accompanying file LICENSE_1_0.txt or copy at |
9 # |
9 // http://www.boost.org/LICENSE_1_0.txt) |
10 # /* Revised by Paul Mensonides (2002) */ |
10 // |
11 # |
11 // See http://www.boost.org/libs/mpl for documentation. |
12 # /* See http://www.boost.org for most recent version. */ |
12 |
13 # |
13 // $Source: /cvsroot/boost/boost/boost/mpl/at.hpp,v $ |
14 # ifndef BOOST_PREPROCESSOR_LIST_AT_HPP |
14 // $Date: 2004/09/04 01:33:46 $ |
15 # define BOOST_PREPROCESSOR_LIST_AT_HPP |
15 // $Revision: 1.7 $ |
16 # |
16 |
17 # include <boost/preprocessor/config/config.hpp> |
17 #include <boost/mpl/at_fwd.hpp> |
18 # include <boost/preprocessor/list/adt.hpp> |
18 #include <boost/mpl/aux_/at_impl.hpp> |
19 # include <boost/preprocessor/list/rest_n.hpp> |
19 #include <boost/mpl/long.hpp> |
20 # |
20 #include <boost/mpl/sequence_tag.hpp> |
21 # /* BOOST_PP_LIST_AT */ |
21 #include <boost/mpl/aux_/na_spec.hpp> |
22 # |
22 #include <boost/mpl/aux_/lambda_support.hpp> |
23 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() |
23 #include <boost/mpl/aux_/nttp_decl.hpp> |
24 # define BOOST_PP_LIST_AT(list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N(index, list)) |
24 |
25 # else |
25 namespace boost { namespace mpl { |
26 # define BOOST_PP_LIST_AT(list, index) BOOST_PP_LIST_AT_I(list, index) |
26 |
27 # define BOOST_PP_LIST_AT_I(list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N(index, list)) |
27 template< |
28 # endif |
28 typename BOOST_MPL_AUX_NA_PARAM(Sequence) |
29 # |
29 , typename BOOST_MPL_AUX_NA_PARAM(N) |
30 # /* BOOST_PP_LIST_AT_D */ |
30 > |
31 # |
31 struct at |
32 # if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG() |
32 : at_impl< typename sequence_tag<Sequence>::type > |
33 # define BOOST_PP_LIST_AT_D(d, list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N_D(d, index, list)) |
33 ::template apply< Sequence,N > |
34 # else |
34 { |
35 # define BOOST_PP_LIST_AT_D(d, list, index) BOOST_PP_LIST_AT_D_I(d, list, index) |
35 BOOST_MPL_AUX_LAMBDA_SUPPORT(2,at,(Sequence,N)) |
36 # define BOOST_PP_LIST_AT_D_I(d, list, index) BOOST_PP_LIST_FIRST(BOOST_PP_LIST_REST_N_D(d, index, list)) |
36 }; |
37 # endif |
37 |
38 # |
38 template< |
39 # endif |
39 typename Sequence |
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40 , BOOST_MPL_AUX_NTTP_DECL(long, N) |
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41 > |
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42 struct at_c |
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43 : at_impl< typename sequence_tag<Sequence>::type > |
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44 ::template apply< Sequence,mpl::long_<N> > |
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45 { |
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46 }; |
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47 |
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48 BOOST_MPL_AUX_NA_SPEC(2, at) |
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49 |
|
50 }} |
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51 |
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52 #endif // BOOST_MPL_AT_HPP_INCLUDED |