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Editing: object_operators.hpp

// Copyright David Abrahams 2002.
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef OBJECT_OPERATORS_DWA2002617_HPP
# define OBJECT_OPERATORS_DWA2002617_HPP

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

# include <boost/python/object_core.hpp>
# include <boost/python/call.hpp>
# include <boost/iterator/detail/enable_if.hpp>
# include <boost/mpl/bool.hpp>

# include <boost/iterator/detail/config_def.hpp>

namespace boost { namespace python { namespace api {

template <class X>
char is_object_operators_helper(object_operators<X> const*);
 
typedef char (&no_type)[2];
no_type is_object_operators_helper(...);

template <class X> X* make_ptr();

template <class L, class R = L>
struct is_object_operators
{
 enum {
 value 
 = (sizeof(api::is_object_operators_helper(api::make_ptr<L>()))
 + sizeof(api::is_object_operators_helper(api::make_ptr<R>()))
 < 4
 )
 };
 typedef mpl::bool_<value> type;
};

# if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_IS_CONVERTIBLE)
template <class L, class R, class T>
struct enable_binary
 : boost::iterators::enable_if<is_object_operators<L,R>, T>
{};
# define BOOST_PYTHON_BINARY_RETURN(T) typename enable_binary<L,R,T>::type
# else
# define BOOST_PYTHON_BINARY_RETURN(T) T
# endif

template <class U>
object object_operators::operator()() const
{
 object_cref2 f = *static_cast(this);
 return call<object>(f.ptr());
}

template <class U>
inline
object_operators::operator bool_type() const
{
 object_cref2 x = *static_cast(this);
 int is_true = PyObject_IsTrue(x.ptr());
 if (is_true < 0) throw_error_already_set();
 return is_true ? &object::ptr : 0;
}

template <class U>
inline bool
object_operators::operator!() const
{
 object_cref2 x = *static_cast(this);
 int is_true = PyObject_IsTrue(x.ptr());
 if (is_true < 0) throw_error_already_set();
 return !is_true;
}

# define BOOST_PYTHON_COMPARE_OP(op, opid) \
template <class L, class R> \
BOOST_PYTHON_BINARY_RETURN(object) operator op(L const& l, R const& r) \
{ \
 return PyObject_RichCompare( \
 object(l).ptr(), object(r).ptr(), opid); \
}
# undef BOOST_PYTHON_COMPARE_OP
 
# define BOOST_PYTHON_BINARY_OPERATOR(op) \
BOOST_PYTHON_DECL object operator op(object const& l, object const& r); \
template <class L, class R> \
BOOST_PYTHON_BINARY_RETURN(object) operator op(L const& l, R const& r) \
{ \
 return object(l) op object(r); \
}
BOOST_PYTHON_BINARY_OPERATOR(>)
BOOST_PYTHON_BINARY_OPERATOR(>=)
BOOST_PYTHON_BINARY_OPERATOR(<)
BOOST_PYTHON_BINARY_OPERATOR(<=)
BOOST_PYTHON_BINARY_OPERATOR(==)
BOOST_PYTHON_BINARY_OPERATOR(!=)
BOOST_PYTHON_BINARY_OPERATOR(+)
BOOST_PYTHON_BINARY_OPERATOR(-)
BOOST_PYTHON_BINARY_OPERATOR(*)
BOOST_PYTHON_BINARY_OPERATOR(/)
BOOST_PYTHON_BINARY_OPERATOR(%)
BOOST_PYTHON_BINARY_OPERATOR(<<)
BOOST_PYTHON_BINARY_OPERATOR(>>)
BOOST_PYTHON_BINARY_OPERATOR(&)
BOOST_PYTHON_BINARY_OPERATOR(^)
BOOST_PYTHON_BINARY_OPERATOR(|)
# undef BOOST_PYTHON_BINARY_OPERATOR

# define BOOST_PYTHON_INPLACE_OPERATOR(op) \
BOOST_PYTHON_DECL object& operator op(object& l, object const& r); \
template <class R> \
object& operator op(object& l, R const& r) \
{ \
 return l op object(r); \
}
BOOST_PYTHON_INPLACE_OPERATOR(+=)
BOOST_PYTHON_INPLACE_OPERATOR(-=)
BOOST_PYTHON_INPLACE_OPERATOR(*=)
BOOST_PYTHON_INPLACE_OPERATOR(/=)
BOOST_PYTHON_INPLACE_OPERATOR(%=)
BOOST_PYTHON_INPLACE_OPERATOR(<<=)
BOOST_PYTHON_INPLACE_OPERATOR(>>=)
BOOST_PYTHON_INPLACE_OPERATOR(&=)
BOOST_PYTHON_INPLACE_OPERATOR(^=)
BOOST_PYTHON_INPLACE_OPERATOR(|=)
# undef BOOST_PYTHON_INPLACE_OPERATOR

}}} // namespace boost::python

#include <boost/iterator/detail/config_undef.hpp>

#endif // OBJECT_OPERATORS_DWA2002617_HPP

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