Chris@16: // Copyright David Abrahams 2002.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef OBJECT_OPERATORS_DWA2002617_HPP
Chris@16: # define OBJECT_OPERATORS_DWA2002617_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: 
Chris@16: # include <boost/python/object_core.hpp>
Chris@16: # include <boost/python/call.hpp>
Chris@16: # include <boost/iterator/detail/enable_if.hpp>
Chris@16: # include <boost/mpl/bool.hpp>
Chris@16: 
Chris@16: # include <boost/iterator/detail/config_def.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python { namespace api {
Chris@16: 
Chris@16: template <class X>
Chris@16: char is_object_operators_helper(object_operators<X> const*);
Chris@16:     
Chris@16: typedef char (&no_type)[2];
Chris@16: no_type is_object_operators_helper(...);
Chris@16: 
Chris@16: template <class X> X* make_ptr();
Chris@16: 
Chris@16: template <class L, class R = L>
Chris@16: struct is_object_operators
Chris@16: {
Chris@16:     enum {
Chris@16:         value 
Chris@16:         = (sizeof(api::is_object_operators_helper(api::make_ptr<L>()))
Chris@16:            + sizeof(api::is_object_operators_helper(api::make_ptr<R>()))
Chris@16:            < 4
Chris@16:         )
Chris@16:     };
Chris@16:     typedef mpl::bool_<value> type;
Chris@16: };
Chris@16: 
Chris@16: # if !defined(BOOST_NO_SFINAE) && !defined(BOOST_NO_IS_CONVERTIBLE)
Chris@16: template <class L, class R, class T>
Chris@16: struct enable_binary
Chris@16:   : boost::iterators::enable_if<is_object_operators<L,R>, T>
Chris@16: {};
Chris@16: #  define BOOST_PYTHON_BINARY_RETURN(T) typename enable_binary<L,R,T>::type
Chris@16: # else
Chris@16: #  define BOOST_PYTHON_BINARY_RETURN(T) T
Chris@16: # endif
Chris@16: 
Chris@16: template <class U>
Chris@16: object object_operators<U>::operator()() const
Chris@16: {
Chris@16:     object_cref2 f = *static_cast<U const*>(this);
Chris@16:     return call<object>(f.ptr());
Chris@16: }
Chris@16: 
Chris@16: 
Chris@16: template <class U>
Chris@16: inline
Chris@16: object_operators<U>::operator bool_type() const
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U const*>(this);
Chris@16:     int is_true = PyObject_IsTrue(x.ptr());
Chris@16:     if (is_true < 0) throw_error_already_set();
Chris@16:     return is_true ? &object::ptr : 0;
Chris@16: }
Chris@16: 
Chris@16: template <class U>
Chris@16: inline bool
Chris@16: object_operators<U>::operator!() const
Chris@16: {
Chris@16:     object_cref2 x = *static_cast<U const*>(this);
Chris@16:     int is_true = PyObject_IsTrue(x.ptr());
Chris@16:     if (is_true < 0) throw_error_already_set();
Chris@16:     return !is_true;
Chris@16: }
Chris@16: 
Chris@16: # define BOOST_PYTHON_COMPARE_OP(op, opid)                              \
Chris@16: template <class L, class R>                                             \
Chris@16: BOOST_PYTHON_BINARY_RETURN(object) operator op(L const& l, R const& r)    \
Chris@16: {                                                                       \
Chris@16:     return PyObject_RichCompare(                                    \
Chris@16:         object(l).ptr(), object(r).ptr(), opid);                        \
Chris@16: }
Chris@16: # undef BOOST_PYTHON_COMPARE_OP
Chris@16:     
Chris@16: # define BOOST_PYTHON_BINARY_OPERATOR(op)                               \
Chris@16: BOOST_PYTHON_DECL object operator op(object const& l, object const& r); \
Chris@16: template <class L, class R>                                             \
Chris@16: BOOST_PYTHON_BINARY_RETURN(object) operator op(L const& l, R const& r)  \
Chris@16: {                                                                       \
Chris@16:     return object(l) op object(r);                                      \
Chris@16: }
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(>)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(>=)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(<)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(<=)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(==)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(!=)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(+)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(-)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(*)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(/)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(%)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(<<)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(>>)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(&)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(^)
Chris@16: BOOST_PYTHON_BINARY_OPERATOR(|)
Chris@16: # undef BOOST_PYTHON_BINARY_OPERATOR
Chris@16: 
Chris@16:         
Chris@16: # define BOOST_PYTHON_INPLACE_OPERATOR(op)                              \
Chris@16: BOOST_PYTHON_DECL object& operator op(object& l, object const& r);      \
Chris@16: template <class R>                                                      \
Chris@16: object& operator op(object& l, R const& r)                              \
Chris@16: {                                                                       \
Chris@16:     return l op object(r);                                              \
Chris@16: }
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(+=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(-=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(*=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(/=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(%=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(<<=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(>>=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(&=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(^=)
Chris@16: BOOST_PYTHON_INPLACE_OPERATOR(|=)
Chris@16: # undef BOOST_PYTHON_INPLACE_OPERATOR
Chris@16: 
Chris@16: }}} // namespace boost::python
Chris@16: 
Chris@16: #include <boost/iterator/detail/config_undef.hpp>
Chris@16: 
Chris@16: #endif // OBJECT_OPERATORS_DWA2002617_HPP