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2 | #ifndef BOOST_MPL_AUX_NUMERIC_CAST_HPP_INCLUDED |
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3 | #define BOOST_MPL_AUX_NUMERIC_CAST_HPP_INCLUDED |
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4 | |
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5 | // Copyright Aleksey Gurtovoy 2003-2004 |
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6 | // |
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7 | // Distributed under the Boost Software License, Version 1.0. |
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8 | // (See accompanying file LICENSE_1_0.txt or copy at |
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9 | // http://www.boost.org/LICENSE_1_0.txt) |
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10 | // |
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11 | // See http://www.boost.org/libs/mpl for documentation. |
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12 | |
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13 | // $Id: numeric_cast_utils.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ |
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14 | // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ |
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15 | // $Revision: 49267 $ |
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16 | |
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17 | #include <boost/mpl/numeric_cast.hpp> |
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18 | #include <boost/mpl/apply_wrap.hpp> |
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19 | #include <boost/mpl/aux_/config/forwarding.hpp> |
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20 | |
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21 | namespace boost { namespace mpl { namespace aux { |
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22 | |
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23 | template< |
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24 | typename F |
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25 | , typename Tag1 |
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26 | , typename Tag2 |
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27 | > |
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28 | struct cast1st_impl |
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29 | { |
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30 | template< typename N1, typename N2 > struct apply |
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31 | #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) |
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32 | : apply_wrap2< |
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33 | F |
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34 | , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag1,Tag2>,N1 >::type |
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35 | , N2 |
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36 | > |
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37 | { |
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38 | #else |
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39 | { |
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40 | typedef typename apply_wrap2< |
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41 | F |
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42 | , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag1,Tag2>,N1 >::type |
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43 | , N2 |
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44 | >::type type; |
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45 | #endif |
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46 | }; |
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47 | }; |
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48 | |
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49 | template< |
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50 | typename F |
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51 | , typename Tag1 |
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52 | , typename Tag2 |
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53 | > |
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54 | struct cast2nd_impl |
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55 | { |
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56 | template< typename N1, typename N2 > struct apply |
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57 | #if !defined(BOOST_MPL_CFG_NO_NESTED_FORWARDING) |
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58 | : apply_wrap2< |
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59 | F |
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60 | , N1 |
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61 | , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag2,Tag1>,N2 >::type |
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62 | > |
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63 | { |
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64 | #else |
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65 | { |
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66 | typedef typename apply_wrap2< |
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67 | F |
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68 | , N1 |
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69 | , typename apply_wrap1< BOOST_MPL_AUX_NUMERIC_CAST<Tag2,Tag1>,N2 >::type |
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70 | >::type type; |
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71 | #endif |
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72 | }; |
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73 | }; |
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74 | |
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75 | }}} |
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76 | |
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77 | #endif // BOOST_MPL_AUX_NUMERIC_CAST_HPP_INCLUDED |
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