| [857] | 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 OPERATORS_DWA2002530_HPP
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| 6 | # define OPERATORS_DWA2002530_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/def_visitor.hpp>
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| 11 | # include <boost/python/converter/arg_to_python.hpp>
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| 12 | # include <boost/python/detail/operator_id.hpp>
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| 13 | # include <boost/python/detail/not_specified.hpp>
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| 14 | # include <boost/python/back_reference.hpp>
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| 15 | # include <boost/mpl/if.hpp>
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| 16 | # include <boost/mpl/eval_if.hpp>
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| 17 | # include <boost/python/self.hpp>
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| 18 | # include <boost/python/other.hpp>
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| 19 | # include <boost/lexical_cast.hpp>
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| 20 | # include <boost/python/refcount.hpp>
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| 21 | # include <string>
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| 22 | # include <complex>
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| 23 |
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| 24 | namespace boost { namespace python {
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| 25 |
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| 26 | namespace detail
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| 27 | {
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| 28 | // This is essentially the old v1 to_python(). It will be eliminated
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| 29 | // once the public interface for to_python is settled on.
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| 30 | template <class T>
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| 31 | PyObject* convert_result(T const& x)
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| 32 | {
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| 33 | return converter::arg_to_python<T>(x).release();
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| 34 | }
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| 35 |
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| 36 | // Operator implementation template declarations. The nested apply
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| 37 | // declaration here keeps MSVC6 happy.
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| 38 | template <operator_id> struct operator_l
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| 39 | {
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| 40 | template <class L, class R> struct apply;
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| 41 | };
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| 42 |
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| 43 | template <operator_id> struct operator_r
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| 44 | {
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| 45 | template <class L, class R> struct apply;
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| 46 | };
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| 47 |
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| 48 | template <operator_id> struct operator_1
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| 49 | {
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| 50 | template <class T> struct apply;
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| 51 | };
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| 52 |
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| 53 | // MSVC6 doesn't want us to do this sort of inheritance on a nested
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| 54 | // class template, so we use this layer of indirection to avoid
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| 55 | // ::template<...> on the nested apply functions below
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| 56 | template <operator_id id, class L, class R>
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| 57 | struct operator_l_inner
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| 58 | : operator_l<id>::template apply<L,R>
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| 59 | {};
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| 60 |
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| 61 | template <operator_id id, class L, class R>
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| 62 | struct operator_r_inner
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| 63 | : operator_r<id>::template apply<L,R>
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| 64 | {};
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| 65 |
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| 66 | template <operator_id id, class T>
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| 67 | struct operator_1_inner
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| 68 | : operator_1<id>::template apply<T>
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| 69 | {};
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| 70 |
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| 71 | // Define three different binary_op templates which take care of
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| 72 | // these cases:
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| 73 | // self op self
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| 74 | // self op R
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| 75 | // L op self
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| 76 | //
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| 77 | // The inner apply metafunction is used to adjust the operator to
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| 78 | // the class type being defined. Inheritance of the outer class is
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| 79 | // simply used to provide convenient access to the operation's
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| 80 | // name().
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| 81 |
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| 82 | // self op self
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| 83 | template <operator_id id>
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| 84 | struct binary_op : operator_l<id>
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| 85 | {
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| 86 | template <class T>
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| 87 | struct apply : operator_l_inner<id,T,T>
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| 88 | {
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| 89 | };
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| 90 | };
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| 91 |
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| 92 | // self op R
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| 93 | template <operator_id id, class R>
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| 94 | struct binary_op_l : operator_l<id>
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| 95 | {
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| 96 | template <class T>
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| 97 | struct apply : operator_l_inner<id,T,R>
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| 98 | {
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| 99 | };
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| 100 | };
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| 101 |
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| 102 | // L op self
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| 103 | template <operator_id id, class L>
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| 104 | struct binary_op_r : operator_r<id>
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| 105 | {
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| 106 | template <class T>
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| 107 | struct apply : operator_r_inner<id,L,T>
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| 108 | {
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| 109 | };
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| 110 | };
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| 111 |
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| 112 | template <operator_id id>
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| 113 | struct unary_op : operator_1<id>
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| 114 | {
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| 115 | template <class T>
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| 116 | struct apply : operator_1_inner<id,T>
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| 117 | {
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| 118 | };
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| 119 | };
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| 120 |
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| 121 | // This type is what actually gets returned from operators used on
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| 122 | // self_t
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| 123 | template <operator_id id, class L = not_specified, class R = not_specified>
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| 124 | struct operator_
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| 125 | : def_visitor<operator_<id,L,R> >
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| 126 | {
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| 127 | private:
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| 128 | template <class ClassT>
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| 129 | void visit(ClassT& cl) const
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| 130 | {
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| 131 | typedef typename mpl::eval_if<
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| 132 | is_same<L,self_t>
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| 133 | , mpl::if_<
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| 134 | is_same<R,self_t>
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| 135 | , binary_op<id>
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| 136 | , binary_op_l<
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| 137 | id
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| 138 | , BOOST_DEDUCED_TYPENAME unwrap_other<R>::type
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| 139 | >
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| 140 | >
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| 141 | , mpl::if_<
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| 142 | is_same<L,not_specified>
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| 143 | , unary_op<id>
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| 144 | , binary_op_r<
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| 145 | id
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| 146 | , BOOST_DEDUCED_TYPENAME unwrap_other<L>::type
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| 147 | >
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| 148 | >
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| 149 | >::type generator;
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| 150 |
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| 151 | cl.def(
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| 152 | generator::name()
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| 153 | , &generator::template apply<
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| 154 | BOOST_DEDUCED_TYPENAME ClassT::wrapped_type
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| 155 | >::execute
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| 156 | );
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| 157 | }
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| 158 |
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| 159 | friend class python::def_visitor_access;
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| 160 | };
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| 161 | }
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| 162 |
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| 163 | # define BOOST_PYTHON_BINARY_OPERATION(id, rid, expr) \
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| 164 | namespace detail \
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| 165 | { \
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| 166 | template <> \
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| 167 | struct operator_l<op_##id> \
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| 168 | { \
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| 169 | template <class L, class R> \
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| 170 | struct apply \
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| 171 | { \
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| 172 | static inline PyObject* execute(L& l, R const& r) \
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| 173 | { \
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| 174 | return detail::convert_result(expr); \
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| 175 | } \
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| 176 | }; \
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| 177 | static char const* name() { return "__" #id "__"; } \
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| 178 | }; \
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| 179 | \
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| 180 | template <> \
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| 181 | struct operator_r<op_##id> \
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| 182 | { \
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| 183 | template <class L, class R> \
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| 184 | struct apply \
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| 185 | { \
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| 186 | static inline PyObject* execute(R& r, L const& l) \
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| 187 | { \
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| 188 | return detail::convert_result(expr); \
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| 189 | } \
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| 190 | }; \
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| 191 | static char const* name() { return "__" #rid "__"; } \
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| 192 | }; \
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| 193 | }
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| 194 |
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| 195 | # define BOOST_PYTHON_BINARY_OPERATOR(id, rid, op) \
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| 196 | BOOST_PYTHON_BINARY_OPERATION(id, rid, l op r) \
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| 197 | namespace self_ns \
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| 198 | { \
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| 199 | template <class L, class R> \
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| 200 | inline detail::operator_<detail::op_##id,L,R> \
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| 201 | operator op(L const&, R const&) \
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| 202 | { \
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| 203 | return detail::operator_<detail::op_##id,L,R>(); \
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| 204 | } \
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| 205 | }
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| 206 |
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| 207 | BOOST_PYTHON_BINARY_OPERATOR(add, radd, +)
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| 208 | BOOST_PYTHON_BINARY_OPERATOR(sub, rsub, -)
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| 209 | BOOST_PYTHON_BINARY_OPERATOR(mul, rmul, *)
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| 210 | BOOST_PYTHON_BINARY_OPERATOR(div, rdiv, /)
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| 211 | BOOST_PYTHON_BINARY_OPERATOR(mod, rmod, %)
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| 212 | BOOST_PYTHON_BINARY_OPERATOR(lshift, rlshift, <<)
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| 213 | BOOST_PYTHON_BINARY_OPERATOR(rshift, rrshift, >>)
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| 214 | BOOST_PYTHON_BINARY_OPERATOR(and, rand, &)
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| 215 | BOOST_PYTHON_BINARY_OPERATOR(xor, rxor, ^)
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| 216 | BOOST_PYTHON_BINARY_OPERATOR(or, ror, |)
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| 217 | BOOST_PYTHON_BINARY_OPERATOR(gt, lt, >)
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| 218 | BOOST_PYTHON_BINARY_OPERATOR(ge, le, >=)
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| 219 | BOOST_PYTHON_BINARY_OPERATOR(lt, gt, <)
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| 220 | BOOST_PYTHON_BINARY_OPERATOR(le, ge, <=)
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| 221 | BOOST_PYTHON_BINARY_OPERATOR(eq, eq, ==)
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| 222 | BOOST_PYTHON_BINARY_OPERATOR(ne, ne, !=)
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| 223 | # undef BOOST_PYTHON_BINARY_OPERATOR
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| 224 |
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| 225 | // pow isn't an operator in C++; handle it specially.
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| 226 | BOOST_PYTHON_BINARY_OPERATION(pow, rpow, pow(l,r))
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| 227 | # undef BOOST_PYTHON_BINARY_OPERATION
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| 228 |
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| 229 | namespace self_ns
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| 230 | {
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| 231 | # ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
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| 232 | template <class L, class R>
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| 233 | inline detail::operator_<detail::op_pow,L,R>
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| 234 | pow(L const&, R const&)
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| 235 | {
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| 236 | return detail::operator_<detail::op_pow,L,R>();
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| 237 | }
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| 238 | # else
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| 239 | // When there's no argument-dependent lookup, we need these
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| 240 | // overloads to handle the case when everything is imported into the
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| 241 | // global namespace. Note that the plain overload below does /not/
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| 242 | // take const& arguments. This is needed by MSVC6 at least, or it
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| 243 | // complains of ambiguities, since there's no partial ordering.
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| 244 | inline detail::operator_<detail::op_pow,self_t,self_t>
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| 245 | pow(self_t, self_t)
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| 246 | {
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| 247 | return detail::operator_<detail::op_pow,self_t,self_t>();
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| 248 | }
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| 249 | template <class R>
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| 250 | inline detail::operator_<detail::op_pow,self_t,R>
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| 251 | pow(self_t const&, R const&)
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| 252 | {
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| 253 | return detail::operator_<detail::op_pow,self_t,R>();
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| 254 | }
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| 255 | template <class L>
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| 256 | inline detail::operator_<detail::op_pow,L,self_t>
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| 257 | pow(L const&, self_t const&)
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| 258 | {
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| 259 | return detail::operator_<detail::op_pow,L,self_t>();
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| 260 | }
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| 261 | # endif
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| 262 | }
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| 263 |
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| 264 |
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| 265 | # define BOOST_PYTHON_INPLACE_OPERATOR(id, op) \
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| 266 | namespace detail \
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| 267 | { \
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| 268 | template <> \
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| 269 | struct operator_l<op_##id> \
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| 270 | { \
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| 271 | template <class L, class R> \
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| 272 | struct apply \
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| 273 | { \
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| 274 | static inline PyObject* \
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| 275 | execute(back_reference<L&> l, R const& r) \
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| 276 | { \
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| 277 | l.get() op r; \
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| 278 | return python::incref(l.source().ptr()); \
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| 279 | } \
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| 280 | }; \
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| 281 | static char const* name() { return "__" #id "__"; } \
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| 282 | }; \
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| 283 | } \
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| 284 | namespace self_ns \
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| 285 | { \
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| 286 | template <class R> \
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| 287 | inline detail::operator_<detail::op_##id,self_t,R> \
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| 288 | operator op(self_t const&, R const&) \
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| 289 | { \
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| 290 | return detail::operator_<detail::op_##id,self_t,R>(); \
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| 291 | } \
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| 292 | }
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| 293 |
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| 294 | BOOST_PYTHON_INPLACE_OPERATOR(iadd,+=)
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| 295 | BOOST_PYTHON_INPLACE_OPERATOR(isub,-=)
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| 296 | BOOST_PYTHON_INPLACE_OPERATOR(imul,*=)
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| 297 | BOOST_PYTHON_INPLACE_OPERATOR(idiv,/=)
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| 298 | BOOST_PYTHON_INPLACE_OPERATOR(imod,%=)
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| 299 | BOOST_PYTHON_INPLACE_OPERATOR(ilshift,<<=)
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| 300 | BOOST_PYTHON_INPLACE_OPERATOR(irshift,>>=)
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| 301 | BOOST_PYTHON_INPLACE_OPERATOR(iand,&=)
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| 302 | BOOST_PYTHON_INPLACE_OPERATOR(ixor,^=)
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| 303 | BOOST_PYTHON_INPLACE_OPERATOR(ior,|=)
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| 304 |
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| 305 | # define BOOST_PYTHON_UNARY_OPERATOR(id, op, func_name) \
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| 306 | namespace detail \
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| 307 | { \
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| 308 | template <> \
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| 309 | struct operator_1<op_##id> \
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| 310 | { \
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| 311 | template <class T> \
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| 312 | struct apply \
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| 313 | { \
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| 314 | static PyObject* execute(T& x) \
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| 315 | { \
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| 316 | return detail::convert_result(op(x)); \
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| 317 | } \
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| 318 | }; \
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| 319 | static char const* name() { return "__" #id "__"; } \
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| 320 | }; \
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| 321 | } \
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| 322 | namespace self_ns \
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| 323 | { \
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| 324 | inline detail::operator_<detail::op_##id> \
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| 325 | func_name(self_t const&) \
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| 326 | { \
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| 327 | return detail::operator_<detail::op_##id>(); \
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| 328 | } \
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| 329 | }
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| 330 | # undef BOOST_PYTHON_INPLACE_OPERATOR
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| 331 |
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| 332 | BOOST_PYTHON_UNARY_OPERATOR(neg, -, operator-)
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| 333 | BOOST_PYTHON_UNARY_OPERATOR(pos, +, operator+)
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| 334 | BOOST_PYTHON_UNARY_OPERATOR(abs, abs, abs)
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| 335 | BOOST_PYTHON_UNARY_OPERATOR(invert, ~, operator~)
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| 336 | BOOST_PYTHON_UNARY_OPERATOR(nonzero, !!, operator!)
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| 337 | BOOST_PYTHON_UNARY_OPERATOR(int, long, int_)
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| 338 | BOOST_PYTHON_UNARY_OPERATOR(long, PyLong_FromLong, long_)
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| 339 | BOOST_PYTHON_UNARY_OPERATOR(float, double, float_)
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| 340 | BOOST_PYTHON_UNARY_OPERATOR(complex, std::complex<double>, complex_)
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| 341 | BOOST_PYTHON_UNARY_OPERATOR(str, lexical_cast<std::string>, str)
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| 342 | # undef BOOST_PYTHON_UNARY_OPERATOR
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| 343 |
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| 344 | }} // namespace boost::python
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| 345 |
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| 346 | # ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
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| 347 | using boost::python::self_ns::abs;
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| 348 | using boost::python::self_ns::int_;
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| 349 | using boost::python::self_ns::long_;
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| 350 | using boost::python::self_ns::float_;
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| 351 | using boost::python::self_ns::complex_;
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| 352 | using boost::python::self_ns::str;
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| 353 | using boost::python::self_ns::pow;
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| 354 | # endif
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| 355 |
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| 356 | #endif // OPERATORS_DWA2002530_HPP
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