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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 #ifndef BOOST_PARAMETER_MACROS_050412_HPP |
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7 #define BOOST_PARAMETER_MACROS_050412_HPP |
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8 |
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9 #include <boost/preprocessor/tuple/elem.hpp> |
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10 #include <boost/preprocessor/repetition/repeat_from_to.hpp> |
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11 #include <boost/preprocessor/arithmetic/inc.hpp> |
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12 #include <boost/preprocessor/logical/bool.hpp> |
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13 #include <boost/preprocessor/punctuation/comma_if.hpp> |
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14 #include <boost/preprocessor/control/expr_if.hpp> |
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15 #include <boost/preprocessor/repetition/enum_params.hpp> |
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16 #include <boost/preprocessor/repetition/enum_binary_params.hpp> |
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17 #include <boost/preprocessor/cat.hpp> |
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18 |
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19 #define BOOST_PARAMETER_FUN_TEMPLATE_HEAD1(n) \ |
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20 template<BOOST_PP_ENUM_PARAMS(n, class T)> |
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21 |
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22 #define BOOST_PARAMETER_FUN_TEMPLATE_HEAD0(n) |
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23 |
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24 #ifndef BOOST_NO_SFINAE |
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25 |
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26 # define BOOST_PARAMETER_MATCH_TYPE(n, param) \ |
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27 BOOST_PP_EXPR_IF(n, typename) param::match \ |
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28 < \ |
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29 BOOST_PP_ENUM_PARAMS(n, T) \ |
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30 >::type |
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31 |
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32 #else |
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33 |
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34 # define BOOST_PARAMETER_MATCH_TYPE(n, param) param |
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35 |
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36 #endif |
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37 |
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38 #define BOOST_PARAMETER_FUN_DECL(z, n, params) \ |
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39 \ |
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40 BOOST_PP_CAT(BOOST_PARAMETER_FUN_TEMPLATE_HEAD, BOOST_PP_BOOL(n))(n) \ |
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41 \ |
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42 BOOST_PP_TUPLE_ELEM(3, 0, params) \ |
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43 BOOST_PP_TUPLE_ELEM(3, 1, params)( \ |
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44 BOOST_PP_ENUM_BINARY_PARAMS(n, T, const& p) \ |
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45 BOOST_PP_COMMA_IF(n) \ |
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46 BOOST_PARAMETER_MATCH_TYPE(n,BOOST_PP_TUPLE_ELEM(3, 2, params)) \ |
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47 kw = BOOST_PP_TUPLE_ELEM(3, 2, params)() \ |
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48 ) \ |
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49 { \ |
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50 return BOOST_PP_CAT(BOOST_PP_TUPLE_ELEM(3, 1, params), _with_named_params)( \ |
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51 kw(BOOST_PP_ENUM_PARAMS(n, p)) \ |
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52 ); \ |
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53 } |
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54 |
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55 // Generates: |
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56 // |
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57 // template<class Params> |
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58 // ret name ## _with_named_params(Params const&); |
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59 // |
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60 // template<class T0> |
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61 // ret name(T0 const& p0, typename parameters::match<T0>::type kw = parameters()) |
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62 // { |
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63 // return name ## _with_named_params(kw(p0)); |
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64 // } |
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65 // |
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66 // template<class T0, ..., class TN> |
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67 // ret name(T0 const& p0, ..., TN const& PN |
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68 // , typename parameters::match<T0, ..., TN>::type kw = parameters()) |
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69 // { |
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70 // return name ## _with_named_params(kw(p0, ..., pN)); |
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71 // } |
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72 // |
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73 // template<class Params> |
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74 // ret name ## _with_named_params(Params const&) |
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75 // |
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76 // lo and hi determines the min and max arity of the generated functions. |
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77 |
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78 #define BOOST_PARAMETER_FUN(ret, name, lo, hi, parameters) \ |
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79 \ |
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80 template<class Params> \ |
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81 ret BOOST_PP_CAT(name, _with_named_params)(Params const& p); \ |
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82 \ |
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83 BOOST_PP_REPEAT_FROM_TO( \ |
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84 lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL, (ret, name, parameters)) \ |
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85 \ |
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86 template<class Params> \ |
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87 ret BOOST_PP_CAT(name, _with_named_params)(Params const& p) |
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88 |
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89 #define BOOST_PARAMETER_MEMFUN(ret, name, lo, hi, parameters) \ |
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90 \ |
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91 BOOST_PP_REPEAT_FROM_TO( \ |
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92 lo, BOOST_PP_INC(hi), BOOST_PARAMETER_FUN_DECL, (ret, name, parameters)) \ |
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93 \ |
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94 template<class Params> \ |
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95 ret BOOST_PP_CAT(name, _with_named_params)(Params const& p) |
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96 |
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97 #endif // BOOST_PARAMETER_MACROS_050412_HPP |
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98 |