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1 #if !defined(BOOST_PP_IS_ITERATING)
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2
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3 // Copyright David Abrahams 2002.
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4 // Distributed under the Boost Software License, Version 1.0. (See
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5 // accompanying file LICENSE_1_0.txt or copy at
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6 // http://www.boost.org/LICENSE_1_0.txt)
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7
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8 # ifndef SIGNATURE_DWA20021121_HPP
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9 # define SIGNATURE_DWA20021121_HPP
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10
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11 # include <boost/python/type_id.hpp>
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12
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13 # include <boost/python/detail/preprocessor.hpp>
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14 # include <boost/python/detail/indirect_traits.hpp>
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15 # include <boost/python/converter/pytype_function.hpp>
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16
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17 # include <boost/preprocessor/iterate.hpp>
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18 # include <boost/preprocessor/iteration/local.hpp>
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19
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20 # include <boost/mpl/at.hpp>
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21 # include <boost/mpl/size.hpp>
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22
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23 namespace boost { namespace python { namespace detail {
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24
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25 struct signature_element
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26 {
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27 char const* basename;
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28 converter::pytype_function pytype_f;
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29 bool lvalue;
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30 };
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31
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32 struct py_func_sig_info
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33 {
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34 signature_element const *signature;
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35 signature_element const *ret;
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36 };
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37
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38 template <unsigned> struct signature_arity;
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39
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40 # define BOOST_PP_ITERATION_PARAMS_1 \
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41 (3, (0, BOOST_PYTHON_MAX_ARITY + 1, <boost/python/detail/signature.hpp>))
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42 # include BOOST_PP_ITERATE()
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43
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44 // A metafunction returning the base class used for
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45 //
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46 // signature<class F, class CallPolicies, class Sig>.
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47 //
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48 template <class Sig>
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49 struct signature_base_select
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50 {
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51 enum { arity = mpl::size<Sig>::value - 1 };
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52 typedef typename signature_arity<arity>::template impl<Sig> type;
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53 };
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54
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55 template <class Sig>
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56 struct signature
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57 : signature_base_select<Sig>::type
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58 {
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59 };
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60
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61 }}} // namespace boost::python::detail
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62
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63 # endif // SIGNATURE_DWA20021121_HPP
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64
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65 #else
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66
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67 # define N BOOST_PP_ITERATION()
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68
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69 template <>
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70 struct signature_arity<N>
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71 {
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72 template <class Sig>
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73 struct impl
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74 {
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75 static signature_element const* elements()
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76 {
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77 static signature_element const result[N+2] = {
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78
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79 #ifndef BOOST_PYTHON_NO_PY_SIGNATURES
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80 # define BOOST_PP_LOCAL_MACRO(i) \
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81 { \
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82 type_id<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>().name() \
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83 , &converter::expected_pytype_for_arg<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::get_pytype \
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84 , indirect_traits::is_reference_to_non_const<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::value \
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85 },
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86 #else
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87 # define BOOST_PP_LOCAL_MACRO(i) \
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88 { \
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89 type_id<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>().name() \
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90 , 0 \
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91 , indirect_traits::is_reference_to_non_const<BOOST_DEDUCED_TYPENAME mpl::at_c<Sig,i>::type>::value \
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92 },
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93 #endif
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94
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95 # define BOOST_PP_LOCAL_LIMITS (0, N)
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96 # include BOOST_PP_LOCAL_ITERATE()
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97 {0,0,0}
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98 };
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99 return result;
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100 }
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101 };
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102 };
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103
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104 #endif // BOOST_PP_IS_ITERATING
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105
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106
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