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1 // Copyright David Abrahams, Daniel Wallin 2003. Use, modification and
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2 // distribution is subject to the Boost Software License, Version 1.0.
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3 // (See accompanying file LICENSE_1_0.txt or copy at
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4 // http://www.boost.org/LICENSE_1_0.txt)
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5
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6 // This file generates overloads in this format:
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7 //
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8 // template<class A0, class A1>
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9 // typename mpl::apply_wrap1<
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10 // aux::make_arg_list<
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11 // PS0,A0
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12 // , aux::make_arg_list<
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13 // PS1,A1
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14 // , mpl::identity<aux::empty_arg_list>
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15 // >
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16 // >
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17 // , unnamed_list
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18 // >::type
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19 // operator()(A0 const& a0, A1 const& a1) const
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20 // {
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21 // typedef typename mpl::apply_wrap1<
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22 // aux::make_arg_list<
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23 // PS0,A0
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24 // , aux::make_arg_list<
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25 // PS1,A1
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26 // , mpl::identity<aux::empty_arg_list>
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27 // >
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28 // >
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29 // >::type arg_tuple;
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30 //
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31 // return arg_tuple(
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32 // a0
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33 // , a1
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34 // , aux::void_()
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35 // ...
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36 // );
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37 // }
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38 //
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39
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40 #if !defined(BOOST_PP_IS_ITERATING)
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41 # error Boost.Parameters - do not include this file!
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42 #endif
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43
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44 #define N BOOST_PP_ITERATION()
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45
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46 #define BOOST_PARAMETER_open_list(z, n, text) \
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47 aux::item< \
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48 BOOST_PP_CAT(PS, n), BOOST_PP_CAT(A, n)
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49
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50 #define BOOST_PARAMETER_close_list(z, n, text) >
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51
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52 #define BOOST_PARAMETER_arg_list(n) \
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53 aux::make_arg_list< \
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54 BOOST_PP_ENUM(N, BOOST_PARAMETER_open_list, _) \
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55 , void_ \
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56 BOOST_PP_REPEAT(N, BOOST_PARAMETER_close_list, _) \
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57 , deduced_list \
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58 , aux::tag_keyword_arg \
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59 >
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60
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61 #define BOOST_PARAMETER_arg_pack_init(z, n, limit) \
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62 BOOST_PP_CAT(a, BOOST_PP_SUB(limit,n))
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63
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64 template<BOOST_PP_ENUM_PARAMS(N, class A)>
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65 typename mpl::first<
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66 typename BOOST_PARAMETER_arg_list(N)::type
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67 >::type
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68 operator()(BOOST_PP_ENUM_BINARY_PARAMS(N, A, & a)) const
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69 {
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70 typedef typename BOOST_PARAMETER_arg_list(N)::type result;
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71
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72 typedef typename mpl::first<result>::type result_type;
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73 typedef typename mpl::second<result>::type error;
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74 error();
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75
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76 return result_type(
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77 BOOST_PP_ENUM(N, BOOST_PARAMETER_arg_pack_init, BOOST_PP_DEC(N))
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78 BOOST_PP_ENUM_TRAILING_PARAMS(
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79 BOOST_PP_SUB(BOOST_PARAMETER_MAX_ARITY, N)
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80 , aux::void_reference() BOOST_PP_INTERCEPT
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81 ));
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82 }
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83
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84 #undef BOOST_PARAMETER_arg_list
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85 #undef BOOST_PARAMETER_open_list
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86 #undef BOOST_PARAMETER_close_list
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87 #undef N
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88
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