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1 // Copyright David Abrahams 2002. |
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2 // Distributed under the Boost Software License, Version 1.0. (See |
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3 // 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 #ifndef DEF_DWA200292_HPP |
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6 # define DEF_DWA200292_HPP |
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7 |
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8 # include <boost/python/detail/prefix.hpp> |
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9 |
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10 # include <boost/python/object_fwd.hpp> |
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11 # include <boost/python/make_function.hpp> |
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12 # include <boost/python/detail/def_helper.hpp> |
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13 # include <boost/python/detail/overloads_fwd.hpp> |
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14 # include <boost/python/scope.hpp> |
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15 # include <boost/python/signature.hpp> |
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16 # include <boost/python/detail/scope.hpp> |
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17 |
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18 namespace boost { namespace python { |
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19 |
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20 namespace detail |
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21 { |
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22 namespace error |
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23 { |
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24 // Compile-time error messages |
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25 template <bool> struct multiple_functions_passed_to_def; |
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26 template <> struct multiple_functions_passed_to_def<false> { typedef char type; }; |
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27 } |
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28 |
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29 // |
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30 // def_from_helper -- |
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31 // |
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32 // Use a def_helper to define a regular wrapped function in the current scope. |
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33 template <class F, class Helper> |
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34 void def_from_helper( |
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35 char const* name, F const& fn, Helper const& helper) |
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36 { |
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37 // Must not try to use default implementations except with method definitions. |
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38 typedef typename error::multiple_functions_passed_to_def< |
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39 Helper::has_default_implementation |
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40 >::type assertion; |
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41 |
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42 detail::scope_setattr_doc( |
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43 name, boost::python::make_function( |
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44 fn |
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45 , helper.policies() |
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46 , helper.keywords()) |
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47 , helper.doc() |
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48 ); |
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49 } |
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50 |
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51 // |
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52 // These two overloads discriminate between def() as applied to |
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53 // regular functions and def() as applied to the result of |
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54 // BOOST_PYTHON_FUNCTION_OVERLOADS(). The final argument is used to |
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55 // discriminate. |
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56 // |
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57 template <class Fn, class A1> |
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58 void |
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59 def_maybe_overloads( |
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60 char const* name |
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61 , Fn fn |
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62 , A1 const& a1 |
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63 , ...) |
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64 { |
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65 detail::def_from_helper(name, fn, def_helper<A1>(a1)); |
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66 } |
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67 |
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68 template <class StubsT, class SigT> |
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69 void def_maybe_overloads( |
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70 char const* name |
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71 , SigT sig |
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72 , StubsT const& stubs |
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73 , detail::overloads_base const*) |
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74 { |
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75 scope current; |
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76 |
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77 detail::define_with_defaults( |
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78 name, stubs, current, detail::get_signature(sig)); |
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79 } |
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80 |
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81 template <class T> |
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82 object make_function1(T fn, ...) { return make_function(fn); } |
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83 |
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84 inline |
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85 object make_function1(object const& x, object const*) { return x; } |
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86 } |
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87 |
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88 template <class Fn> |
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89 void def(char const* name, Fn fn) |
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90 { |
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91 detail::scope_setattr_doc(name, detail::make_function1(fn, &fn), 0); |
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92 } |
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93 |
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94 template <class Arg1T, class Arg2T> |
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95 void def(char const* name, Arg1T arg1, Arg2T const& arg2) |
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96 { |
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97 detail::def_maybe_overloads(name, arg1, arg2, &arg2); |
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98 } |
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99 |
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100 template <class F, class A1, class A2> |
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101 void def(char const* name, F f, A1 const& a1, A2 const& a2) |
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102 { |
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103 detail::def_from_helper(name, f, detail::def_helper<A1,A2>(a1,a2)); |
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104 } |
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105 |
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106 template <class F, class A1, class A2, class A3> |
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107 void def(char const* name, F f, A1 const& a1, A2 const& a2, A3 const& a3) |
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108 { |
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109 detail::def_from_helper(name, f, detail::def_helper<A1,A2,A3>(a1,a2,a3)); |
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110 } |
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111 |
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112 }} // namespace boost::python |
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113 |
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114 #endif // DEF_DWA200292_HPP |