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// 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 OPERATORS_DWA2002530_HPP
# define OPERATORS_DWA2002530_HPP
# include <boost/python/detail/prefix.hpp>
# include <boost/python/def_visitor.hpp>
# include <boost/python/converter/arg_to_python.hpp>
# include <boost/python/detail/operator_id.hpp>
# include <boost/python/detail/not_specified.hpp>
# include <boost/python/back_reference.hpp>
# include <boost/mpl/if.hpp>
# include <boost/mpl/eval_if.hpp>
# include <boost/python/self.hpp>
# include <boost/python/other.hpp>
# include <boost/lexical_cast.hpp>
# include <boost/python/refcount.hpp>
# include <boost/python/detail/unwrap_wrapper.hpp>
# include <string>
# include <complex>
namespace boost { namespace python {
namespace detail
{
// This is essentially the old v1 to_python(). It will be eliminated
// once the public interface for to_python is settled on.
template <class T>
PyObject* convert_result(T const& x)
{
return converter::arg_to_python<T>(x).release();
}
// Operator implementation template declarations. The nested apply
// declaration here keeps MSVC6 happy.
template <operator_id> struct operator_l
{
template <class L, class R> struct apply;
};
template <operator_id> struct operator_r
{
template <class L, class R> struct apply;
};
template <operator_id> struct operator_1
{
template <class T> struct apply;
};
// MSVC6 doesn't want us to do this sort of inheritance on a nested
// class template, so we use this layer of indirection to avoid
// ::template<...> on the nested apply functions below
template <operator_id id, class L, class R>
struct operator_l_inner
: operator_l<id>::template apply<L,R>
{};
template <operator_id id, class L, class R>
struct operator_r_inner
: operator_r<id>::template apply<L,R>
{};
template <operator_id id, class T>
struct operator_1_inner
: operator_1<id>::template apply<T>
{};
// Define three different binary_op templates which take care of
// these cases:
// self op self
// self op R
// L op self
//
// The inner apply metafunction is used to adjust the operator to
// the class type being defined. Inheritance of the outer class is
// simply used to provide convenient access to the operation's
// name().
// self op self
template <operator_id id>
struct binary_op : operator_l<id>
{
template <class T>
struct apply : operator_l_inner<id,T,T>
{
};
};
// self op R
template <operator_id id, class R>
struct binary_op_l : operator_l<id>
{
template <class T>
struct apply : operator_l_inner<id,T,R>
{
};
};
// L op self
template <operator_id id, class L>
struct binary_op_r : operator_r<id>
{
template <class T>
struct apply : operator_r_inner<id,L,T>
{
};
};
template <operator_id id>
struct unary_op : operator_1<id>
{
template <class T>
struct apply : operator_1_inner<id,T>
{
};
};
// This type is what actually gets returned from operators used on
// self_t
template <operator_id id, class L = not_specified, class R = not_specified>
struct operator_
: def_visitor<operator_<id,L,R> >
{
private:
template <class ClassT>
void visit(ClassT& cl) const
{
typedef typename mpl::eval_if<
is_same<L,self_t>
, mpl::if_<
is_same<R,self_t>
, binary_op<id>
, binary_op_l<
id
, BOOST_DEDUCED_TYPENAME unwrap_other<R>::type
>
>
, mpl::if_<
is_same<L,not_specified>
, unary_op<id>
, binary_op_r<
id
, BOOST_DEDUCED_TYPENAME unwrap_other<L>::type
>
>
>::type generator;
cl.def(
generator::name()
, &generator::template apply<
BOOST_DEDUCED_TYPENAME ClassT::wrapped_type
>::execute
);
}
friend class python::def_visitor_access;
};
}
# define BOOST_PYTHON_BINARY_OPERATION(id, rid, expr) \
namespace detail \
{ \
template <> \
struct operator_l<op_##id> \
{ \
template <class L, class R> \
struct apply \
{ \
typedef typename unwrap_wrapper_<L>::type lhs; \
typedef typename unwrap_wrapper_<R>::type rhs; \
static PyObject* execute(lhs& l, rhs const& r) \
{ \
return detail::convert_result(expr); \
} \
}; \
static char const* name() { return "__" #id "__"; } \
}; \
\
template <> \
struct operator_r<op_##id> \
{ \
template <class L, class R> \
struct apply \
{ \
typedef typename unwrap_wrapper_<L>::type lhs; \
typedef typename unwrap_wrapper_<R>::type rhs; \
static PyObject* execute(rhs& r, lhs const& l) \
{ \
return detail::convert_result(expr); \
} \
}; \
static char const* name() { return "__" #rid "__"; } \
}; \
}
# define BOOST_PYTHON_BINARY_OPERATOR(id, rid, op) \
BOOST_PYTHON_BINARY_OPERATION(id, rid, l op r) \
namespace self_ns \
{ \
template <class L, class R> \
inline detail::operator_<detail::op_##id,L,R> \
operator op(L const&, R const&) \
{ \
return detail::operator_<detail::op_##id,L,R>(); \
} \
}
BOOST_PYTHON_BINARY_OPERATOR(add, radd, +)
BOOST_PYTHON_BINARY_OPERATOR(sub, rsub, -)
BOOST_PYTHON_BINARY_OPERATOR(mul, rmul, *)
#if PY_VERSION_HEX >= 0x03000000
BOOST_PYTHON_BINARY_OPERATOR(truediv, rtruediv, /)
#else
BOOST_PYTHON_BINARY_OPERATOR(div, rdiv, /)
#endif
BOOST_PYTHON_BINARY_OPERATOR(mod, rmod, %)
BOOST_PYTHON_BINARY_OPERATOR(lshift, rlshift, <<)
BOOST_PYTHON_BINARY_OPERATOR(rshift, rrshift, >>)
BOOST_PYTHON_BINARY_OPERATOR(and, rand, &)
BOOST_PYTHON_BINARY_OPERATOR(xor, rxor, ^)
BOOST_PYTHON_BINARY_OPERATOR(or, ror, |)
BOOST_PYTHON_BINARY_OPERATOR(gt, lt, >)
BOOST_PYTHON_BINARY_OPERATOR(ge, le, >=)
BOOST_PYTHON_BINARY_OPERATOR(lt, gt, <)
BOOST_PYTHON_BINARY_OPERATOR(le, ge, <=)
BOOST_PYTHON_BINARY_OPERATOR(eq, eq, ==)
BOOST_PYTHON_BINARY_OPERATOR(ne, ne, !=)
# undef BOOST_PYTHON_BINARY_OPERATOR
// pow isn't an operator in C++; handle it specially.
BOOST_PYTHON_BINARY_OPERATION(pow, rpow, pow(l,r))
# undef BOOST_PYTHON_BINARY_OPERATION
namespace self_ns
{
# ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
template <class L, class R>
inline detail::operator_<detail::op_pow,L,R>
pow(L const&, R const&)
{
return detail::operator_<detail::op_pow,L,R>();
}
# else
// When there's no argument-dependent lookup, we need these
// overloads to handle the case when everything is imported into the
// global namespace. Note that the plain overload below does /not/
// take const& arguments. This is needed by MSVC6 at least, or it
// complains of ambiguities, since there's no partial ordering.
inline detail::operator_<detail::op_pow,self_t,self_t>
pow(self_t, self_t)
{
return detail::operator_<detail::op_pow,self_t,self_t>();
}
template <class R>
inline detail::operator_<detail::op_pow,self_t,R>
pow(self_t const&, R const&)
{
return detail::operator_<detail::op_pow,self_t,R>();
}
template <class L>
inline detail::operator_<detail::op_pow,L,self_t>
pow(L const&, self_t const&)
{
return detail::operator_<detail::op_pow,L,self_t>();
}
# endif
}
# define BOOST_PYTHON_INPLACE_OPERATOR(id, op) \
namespace detail \
{ \
template <> \
struct operator_l<op_##id> \
{ \
template <class L, class R> \
struct apply \
{ \
typedef typename unwrap_wrapper_<L>::type lhs; \
typedef typename unwrap_wrapper_<R>::type rhs; \
static PyObject* \
execute(back_reference<lhs&> l, rhs const& r) \
{ \
l.get() op r; \
return python::incref(l.source().ptr()); \
} \
}; \
static char const* name() { return "__" #id "__"; } \
}; \
} \
namespace self_ns \
{ \
template <class R> \
inline detail::operator_<detail::op_##id,self_t,R> \
operator op(self_t const&, R const&) \
{ \
return detail::operator_<detail::op_##id,self_t,R>(); \
} \
}
BOOST_PYTHON_INPLACE_OPERATOR(iadd,+=)
BOOST_PYTHON_INPLACE_OPERATOR(isub,-=)
BOOST_PYTHON_INPLACE_OPERATOR(imul,*=)
BOOST_PYTHON_INPLACE_OPERATOR(idiv,/=)
BOOST_PYTHON_INPLACE_OPERATOR(imod,%=)
BOOST_PYTHON_INPLACE_OPERATOR(ilshift,<<=)
BOOST_PYTHON_INPLACE_OPERATOR(irshift,>>=)
BOOST_PYTHON_INPLACE_OPERATOR(iand,&=)
BOOST_PYTHON_INPLACE_OPERATOR(ixor,^=)
BOOST_PYTHON_INPLACE_OPERATOR(ior,|=)
# define BOOST_PYTHON_UNARY_OPERATOR(id, op, func_name) \
namespace detail \
{ \
template <> \
struct operator_1<op_##id> \
{ \
template <class T> \
struct apply \
{ \
typedef typename unwrap_wrapper_<T>::type self_t; \
static PyObject* execute(self_t& x) \
{ \
return detail::convert_result(op(x)); \
} \
}; \
static char const* name() { return "__" #id "__"; } \
}; \
} \
namespace self_ns \
{ \
inline detail::operator_<detail::op_##id> \
func_name(self_t const&) \
{ \
return detail::operator_<detail::op_##id>(); \
} \
}
# undef BOOST_PYTHON_INPLACE_OPERATOR
BOOST_PYTHON_UNARY_OPERATOR(neg, -, operator-)
BOOST_PYTHON_UNARY_OPERATOR(pos, +, operator+)
BOOST_PYTHON_UNARY_OPERATOR(abs, abs, abs)
BOOST_PYTHON_UNARY_OPERATOR(invert, ~, operator~)
#if PY_VERSION_HEX >= 0x03000000
BOOST_PYTHON_UNARY_OPERATOR(bool, !!, operator!)
#else
BOOST_PYTHON_UNARY_OPERATOR(nonzero, !!, operator!)
#endif
BOOST_PYTHON_UNARY_OPERATOR(int, long, int_)
BOOST_PYTHON_UNARY_OPERATOR(long, PyLong_FromLong, long_)
BOOST_PYTHON_UNARY_OPERATOR(float, double, float_)
BOOST_PYTHON_UNARY_OPERATOR(complex, std::complex<double>, complex_)
BOOST_PYTHON_UNARY_OPERATOR(str, lexical_cast<std::string>, str)
BOOST_PYTHON_UNARY_OPERATOR(repr, lexical_cast<std::string>, repr)
# undef BOOST_PYTHON_UNARY_OPERATOR
}} // namespace boost::python
# ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
using boost::python::self_ns::abs;
using boost::python::self_ns::int_;
using boost::python::self_ns::long_;
using boost::python::self_ns::float_;
using boost::python::self_ns::complex_;
using boost::python::self_ns::str;
using boost::python::self_ns::repr;
using boost::python::self_ns::pow;
# endif
#endif // OPERATORS_DWA2002530_HPP
|
