Symaptic: os/ossrv/ossrv_pub/boost_apis/boost/python/operators.hpp@bde4ae8d615e

     1 // Copyright David Abrahams 2002.

     2 // Distributed under the Boost Software License, Version 1.0. (See

     3 // accompanying file LICENSE_1_0.txt or copy at

     4 // http://www.boost.org/LICENSE_1_0.txt)

     5 #ifndef OPERATORS_DWA2002530_HPP

     6 # define OPERATORS_DWA2002530_HPP

     8 # include <boost/python/detail/prefix.hpp>

    10 # include <boost/python/def_visitor.hpp>

    11 # include <boost/python/converter/arg_to_python.hpp>

    12 # include <boost/python/detail/operator_id.hpp>

    13 # include <boost/python/detail/not_specified.hpp>

    14 # include <boost/python/back_reference.hpp>

    15 # include <boost/mpl/if.hpp>

    16 # include <boost/mpl/eval_if.hpp>

    17 # include <boost/python/self.hpp>

    18 # include <boost/python/other.hpp>

    19 # include <boost/lexical_cast.hpp>

    20 # include <boost/python/refcount.hpp>

    21 # include <boost/python/detail/unwrap_wrapper.hpp>

    22 # include <string>

    23 # include <complex>

    25 namespace boost { namespace python {

    27 namespace detail

    28 {

    29   // This is essentially the old v1 to_python(). It will be eliminated

    30   // once the public interface for to_python is settled on.

    31   template <class T>

    32   PyObject* convert_result(T const& x)

    33   {

    34       return converter::arg_to_python<T>(x).release();

    35   }

    37   // Operator implementation template declarations. The nested apply

    38   // declaration here keeps MSVC6 happy.

    39   template <operator_id> struct operator_l

    40   {

    41       template <class L, class R> struct apply;

    42   };

    44   template <operator_id> struct operator_r

    45   {

    46       template <class L, class R> struct apply;

    47   };

    49   template <operator_id> struct operator_1

    50   {

    51       template <class T> struct apply;

    52   };

    54   // MSVC6 doesn't want us to do this sort of inheritance on a nested

    55   // class template, so we use this layer of indirection to avoid

    56   // ::template<...> on the nested apply functions below

    57   template <operator_id id, class L, class R>

    58   struct operator_l_inner

    59       : operator_l<id>::template apply<L,R>

    60   {};

    62   template <operator_id id, class L, class R>

    63   struct operator_r_inner

    64       : operator_r<id>::template apply<L,R>

    65   {};

    67   template <operator_id id, class T>

    68   struct operator_1_inner

    69       : operator_1<id>::template apply<T>

    70   {};

    72   // Define three different binary_op templates which take care of

    73   // these cases:

    74   //    self op self

    75   //    self op R

    76   //    L op self

    77   //

    78   // The inner apply metafunction is used to adjust the operator to

    79   // the class type being defined. Inheritance of the outer class is

    80   // simply used to provide convenient access to the operation's

    81   // name().

    83   // self op self

    84   template <operator_id id>

    85   struct binary_op : operator_l<id>

    86   {

    87       template <class T>

    88       struct apply : operator_l_inner<id,T,T>

    89       {

    90       };

    91   };

    93   // self op R

    94   template <operator_id id, class R>

    95   struct binary_op_l : operator_l<id>

    96   {

    97       template <class T>

    98       struct apply : operator_l_inner<id,T,R>

    99       {

   100       };

   101   };

   103   // L op self

   104   template <operator_id id, class L>

   105   struct binary_op_r : operator_r<id>

   106   {

   107       template <class T>

   108       struct apply : operator_r_inner<id,L,T>

   109       {

   110       };

   111   };

   113   template <operator_id id>

   114   struct unary_op : operator_1<id>

   115   {

   116       template <class T>

   117       struct apply : operator_1_inner<id,T>

   118       {

   119       };

   120   };

   122   // This type is what actually gets returned from operators used on

   123   // self_t

   124   template <operator_id id, class L = not_specified, class R = not_specified>

   125   struct operator_

   126     : def_visitor<operator_<id,L,R> >

   127   {

   128    private:

   129       template <class ClassT>

   130       void visit(ClassT& cl) const

   131       {

   132           typedef typename mpl::eval_if<

   133               is_same<L,self_t>

   134             , mpl::if_<

   135                   is_same<R,self_t>

   136                 , binary_op<id>

   137                 , binary_op_l<

   138                       id

   139                     , BOOST_DEDUCED_TYPENAME unwrap_other<R>::type

   140                   >

   141               >

   142             , mpl::if_<

   143                   is_same<L,not_specified>

   144                 , unary_op<id>

   145                 , binary_op_r<

   146                       id

   147                     , BOOST_DEDUCED_TYPENAME unwrap_other<L>::type

   148                   >

   149               >

   150           >::type generator;

   152           cl.def(

   153               generator::name()

   154             , &generator::template apply<

   155                  BOOST_DEDUCED_TYPENAME ClassT::wrapped_type

   156               >::execute

   157           );

   158       }

   160       friend class python::def_visitor_access;

   161   };

   162 }

   164 # define BOOST_PYTHON_BINARY_OPERATION(id, rid, expr)       \

   165 namespace detail                                            \

   166 {                                                           \

   167   template <>                                               \

   168   struct operator_l<op_##id>                                \

   169   {                                                         \

   170       template <class L, class R>                           \

   171       struct apply                                          \

   172       {                                                     \

   173           typedef typename unwrap_wrapper_<L>::type lhs;    \

   174           typedef typename unwrap_wrapper_<R>::type rhs;    \

   175           static PyObject* execute(lhs& l, rhs const& r)    \

   176           {                                                 \

   177               return detail::convert_result(expr);          \

   178           }                                                 \

   179       };                                                    \

   180       static char const* name() { return "__" #id "__"; }   \

   181   };                                                        \

   182                                                             \

   183   template <>                                               \

   184   struct operator_r<op_##id>                                \

   185   {                                                         \

   186       template <class L, class R>                           \

   187       struct apply                                          \

   188       {                                                     \

   189           typedef typename unwrap_wrapper_<L>::type lhs;    \

   190           typedef typename unwrap_wrapper_<R>::type rhs;    \

   191           static PyObject* execute(rhs& r, lhs const& l)    \

   192           {                                                 \

   193               return detail::convert_result(expr);          \

   194           }                                                 \

   195       };                                                    \

   196       static char const* name() { return "__" #rid "__"; }  \

   197   };                                                        \

   198 }

   200 # define BOOST_PYTHON_BINARY_OPERATOR(id, rid, op)      \

   201 BOOST_PYTHON_BINARY_OPERATION(id, rid, l op r)          \

   202 namespace self_ns                                       \

   203 {                                                       \

   204   template <class L, class R>                           \

   205   inline detail::operator_<detail::op_##id,L,R>         \

   206   operator op(L const&, R const&)                       \

   207   {                                                     \

   208       return detail::operator_<detail::op_##id,L,R>();  \

   209   }                                                     \

   210 }

   212 BOOST_PYTHON_BINARY_OPERATOR(add, radd, +)

   213 BOOST_PYTHON_BINARY_OPERATOR(sub, rsub, -)

   214 BOOST_PYTHON_BINARY_OPERATOR(mul, rmul, *)

   215 BOOST_PYTHON_BINARY_OPERATOR(div, rdiv, /)

   216 BOOST_PYTHON_BINARY_OPERATOR(mod, rmod, %)

   217 BOOST_PYTHON_BINARY_OPERATOR(lshift, rlshift, <<)

   218 BOOST_PYTHON_BINARY_OPERATOR(rshift, rrshift, >>)

   219 BOOST_PYTHON_BINARY_OPERATOR(and, rand, &)

   220 BOOST_PYTHON_BINARY_OPERATOR(xor, rxor, ^)

   221 BOOST_PYTHON_BINARY_OPERATOR(or, ror, |)

   222 BOOST_PYTHON_BINARY_OPERATOR(gt, lt, >)

   223 BOOST_PYTHON_BINARY_OPERATOR(ge, le, >=)

   224 BOOST_PYTHON_BINARY_OPERATOR(lt, gt, <)

   225 BOOST_PYTHON_BINARY_OPERATOR(le, ge, <=)

   226 BOOST_PYTHON_BINARY_OPERATOR(eq, eq, ==)

   227 BOOST_PYTHON_BINARY_OPERATOR(ne, ne, !=)

   228 # undef BOOST_PYTHON_BINARY_OPERATOR

   230 // pow isn't an operator in C++; handle it specially.

   231 BOOST_PYTHON_BINARY_OPERATION(pow, rpow, pow(l,r))

   232 # undef BOOST_PYTHON_BINARY_OPERATION

   234 namespace self_ns

   235 {

   236 # ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP

   237   template <class L, class R>

   238   inline detail::operator_<detail::op_pow,L,R>

   239   pow(L const&, R const&)

   240   {

   241       return detail::operator_<detail::op_pow,L,R>();

   242   }

   243 # else

   244   // When there's no argument-dependent lookup, we need these

   245   // overloads to handle the case when everything is imported into the

   246   // global namespace. Note that the plain overload below does /not/

   247   // take const& arguments. This is needed by MSVC6 at least, or it

   248   // complains of ambiguities, since there's no partial ordering.

   249   inline detail::operator_<detail::op_pow,self_t,self_t>

   250   pow(self_t, self_t)

   251   {

   252       return detail::operator_<detail::op_pow,self_t,self_t>();

   253   }

   254   template <class R>

   255   inline detail::operator_<detail::op_pow,self_t,R>

   256   pow(self_t const&, R const&)

   257   {

   258       return detail::operator_<detail::op_pow,self_t,R>();

   259   }

   260   template <class L>

   261   inline detail::operator_<detail::op_pow,L,self_t>

   262   pow(L const&, self_t const&)

   263   {

   264       return detail::operator_<detail::op_pow,L,self_t>();

   265   }

   266 # endif

   267 }

   270 # define BOOST_PYTHON_INPLACE_OPERATOR(id, op)                  \

   271 namespace detail                                                \

   272 {                                                               \

   273   template <>                                                   \

   274   struct operator_l<op_##id>                                    \

   275   {                                                             \

   276       template <class L, class R>                               \

   277       struct apply                                              \

   278       {                                                         \

   279           typedef typename unwrap_wrapper_<L>::type lhs;        \

   280           typedef typename unwrap_wrapper_<R>::type rhs;        \

   281           static PyObject*                                      \

   282           execute(back_reference<lhs&> l, rhs const& r)         \

   283           {                                                     \

   284               l.get() op r;                                     \

   285               return python::incref(l.source().ptr());          \

   286           }                                                     \

   287       };                                                        \

   288       static char const* name() { return "__" #id "__"; }       \

   289   };                                                            \

   290 }                                                               \

   291 namespace self_ns                                               \

   292 {                                                               \

   293   template <class R>                                            \

   294   inline detail::operator_<detail::op_##id,self_t,R>            \

   295   operator op(self_t const&, R const&)                          \

   296   {                                                             \

   297       return detail::operator_<detail::op_##id,self_t,R>();     \

   298   }                                                             \

   299 }

   301 BOOST_PYTHON_INPLACE_OPERATOR(iadd,+=)

   302 BOOST_PYTHON_INPLACE_OPERATOR(isub,-=)

   303 BOOST_PYTHON_INPLACE_OPERATOR(imul,*=)

   304 BOOST_PYTHON_INPLACE_OPERATOR(idiv,/=)

   305 BOOST_PYTHON_INPLACE_OPERATOR(imod,%=)

   306 BOOST_PYTHON_INPLACE_OPERATOR(ilshift,<<=)

   307 BOOST_PYTHON_INPLACE_OPERATOR(irshift,>>=)

   308 BOOST_PYTHON_INPLACE_OPERATOR(iand,&=)

   309 BOOST_PYTHON_INPLACE_OPERATOR(ixor,^=)

   310 BOOST_PYTHON_INPLACE_OPERATOR(ior,|=)

   312 # define BOOST_PYTHON_UNARY_OPERATOR(id, op, func_name)         \

   313 namespace detail                                                \

   314 {                                                               \

   315   template <>                                                   \

   316   struct operator_1<op_##id>                                    \

   317   {                                                             \

   318       template <class T>                                        \

   319       struct apply                                              \

   320       {                                                         \

   321           typedef typename unwrap_wrapper_<T>::type self_t;     \

   322           static PyObject* execute(self_t& x)                   \

   323           {                                                     \

   324               return detail::convert_result(op(x));             \

   325           }                                                     \

   326       };                                                        \

   327       static char const* name() { return "__" #id "__"; }       \

   328   };                                                            \

   329 }                                                               \

   330 namespace self_ns                                               \

   331 {                                                               \

   332   inline detail::operator_<detail::op_##id>                     \

   333   func_name(self_t const&)                                      \

   334   {                                                             \

   335       return detail::operator_<detail::op_##id>();              \

   336   }                                                             \

   337 }

   338 # undef BOOST_PYTHON_INPLACE_OPERATOR

   340 BOOST_PYTHON_UNARY_OPERATOR(neg, -, operator-)

   341 BOOST_PYTHON_UNARY_OPERATOR(pos, +, operator+)

   342 BOOST_PYTHON_UNARY_OPERATOR(abs, abs, abs)

   343 BOOST_PYTHON_UNARY_OPERATOR(invert, ~, operator~)

   344 BOOST_PYTHON_UNARY_OPERATOR(nonzero, !!, operator!)

   345 BOOST_PYTHON_UNARY_OPERATOR(int, long, int_)

   346 BOOST_PYTHON_UNARY_OPERATOR(long, PyLong_FromLong, long_)

   347 BOOST_PYTHON_UNARY_OPERATOR(float, double, float_)

   348 BOOST_PYTHON_UNARY_OPERATOR(complex, std::complex<double>, complex_)

   349 BOOST_PYTHON_UNARY_OPERATOR(str, lexical_cast<std::string>, str)

   350 # undef BOOST_PYTHON_UNARY_OPERATOR

   352 }} // namespace boost::python

   354 # ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP

   355 using boost::python::self_ns::abs;

   356 using boost::python::self_ns::int_;

   357 using boost::python::self_ns::long_;

   358 using boost::python::self_ns::float_;

   359 using boost::python::self_ns::complex_;

   360 using boost::python::self_ns::str;

   361 using boost::python::self_ns::pow;

   362 # endif

   364 #endif // OPERATORS_DWA2002530_HPP

author	sl@SLION-WIN7.fritz.box
	Fri, 15 Jun 2012 03:10:57 +0200
changeset 0	bde4ae8d615e
permissions	-rw-r--r--