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375 lines
14 KiB
C++
375 lines
14 KiB
C++
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// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef OPERATORS_DWA2002530_HPP
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# define OPERATORS_DWA2002530_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/python/def_visitor.hpp>
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# include <boost/python/converter/arg_to_python.hpp>
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# include <boost/python/detail/operator_id.hpp>
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# include <boost/python/detail/not_specified.hpp>
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# include <boost/python/back_reference.hpp>
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# include <boost/mpl/if.hpp>
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# include <boost/mpl/eval_if.hpp>
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# include <boost/python/self.hpp>
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# include <boost/python/other.hpp>
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# include <boost/lexical_cast.hpp>
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# include <boost/python/refcount.hpp>
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# include <boost/python/detail/unwrap_wrapper.hpp>
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# include <string>
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# include <complex>
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namespace boost { namespace python {
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namespace detail
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{
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// This is essentially the old v1 to_python(). It will be eliminated
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// once the public interface for to_python is settled on.
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template <class T>
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PyObject* convert_result(T const& x)
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{
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return converter::arg_to_python<T>(x).release();
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}
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// Operator implementation template declarations. The nested apply
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// declaration here keeps MSVC6 happy.
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template <operator_id> struct operator_l
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{
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template <class L, class R> struct apply;
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};
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template <operator_id> struct operator_r
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{
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template <class L, class R> struct apply;
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};
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template <operator_id> struct operator_1
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{
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template <class T> struct apply;
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};
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// MSVC6 doesn't want us to do this sort of inheritance on a nested
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// class template, so we use this layer of indirection to avoid
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// ::template<...> on the nested apply functions below
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template <operator_id id, class L, class R>
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struct operator_l_inner
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: operator_l<id>::template apply<L,R>
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{};
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template <operator_id id, class L, class R>
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struct operator_r_inner
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: operator_r<id>::template apply<L,R>
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{};
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template <operator_id id, class T>
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struct operator_1_inner
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: operator_1<id>::template apply<T>
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{};
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// Define three different binary_op templates which take care of
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// these cases:
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// self op self
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// self op R
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// L op self
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//
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// The inner apply metafunction is used to adjust the operator to
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// the class type being defined. Inheritance of the outer class is
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// simply used to provide convenient access to the operation's
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// name().
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// self op self
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template <operator_id id>
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struct binary_op : operator_l<id>
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{
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template <class T>
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struct apply : operator_l_inner<id,T,T>
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{
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};
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};
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// self op R
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template <operator_id id, class R>
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struct binary_op_l : operator_l<id>
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{
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template <class T>
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struct apply : operator_l_inner<id,T,R>
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{
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};
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};
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// L op self
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template <operator_id id, class L>
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struct binary_op_r : operator_r<id>
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{
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template <class T>
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struct apply : operator_r_inner<id,L,T>
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{
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};
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};
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template <operator_id id>
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struct unary_op : operator_1<id>
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{
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template <class T>
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struct apply : operator_1_inner<id,T>
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{
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};
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};
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// This type is what actually gets returned from operators used on
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// self_t
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template <operator_id id, class L = not_specified, class R = not_specified>
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struct operator_
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: def_visitor<operator_<id,L,R> >
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{
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private:
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template <class ClassT>
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void visit(ClassT& cl) const
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{
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typedef typename mpl::eval_if<
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is_same<L,self_t>
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, mpl::if_<
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is_same<R,self_t>
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, binary_op<id>
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, binary_op_l<
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id
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, BOOST_DEDUCED_TYPENAME unwrap_other<R>::type
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>
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>
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, mpl::if_<
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is_same<L,not_specified>
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, unary_op<id>
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, binary_op_r<
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id
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, BOOST_DEDUCED_TYPENAME unwrap_other<L>::type
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>
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>
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>::type generator;
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cl.def(
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generator::name()
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, &generator::template apply<
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BOOST_DEDUCED_TYPENAME ClassT::wrapped_type
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>::execute
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);
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}
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friend class python::def_visitor_access;
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};
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}
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# define BOOST_PYTHON_BINARY_OPERATION(id, rid, expr) \
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namespace detail \
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{ \
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template <> \
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struct operator_l<op_##id> \
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{ \
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template <class L, class R> \
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struct apply \
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{ \
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typedef typename unwrap_wrapper_<L>::type lhs; \
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typedef typename unwrap_wrapper_<R>::type rhs; \
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static PyObject* execute(lhs& l, rhs const& r) \
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{ \
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return detail::convert_result(expr); \
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} \
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}; \
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static char const* name() { return "__" #id "__"; } \
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}; \
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\
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template <> \
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struct operator_r<op_##id> \
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{ \
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template <class L, class R> \
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struct apply \
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{ \
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typedef typename unwrap_wrapper_<L>::type lhs; \
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typedef typename unwrap_wrapper_<R>::type rhs; \
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static PyObject* execute(rhs& r, lhs const& l) \
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{ \
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return detail::convert_result(expr); \
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} \
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}; \
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static char const* name() { return "__" #rid "__"; } \
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}; \
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}
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# define BOOST_PYTHON_BINARY_OPERATOR(id, rid, op) \
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BOOST_PYTHON_BINARY_OPERATION(id, rid, l op r) \
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namespace self_ns \
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{ \
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template <class L, class R> \
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inline detail::operator_<detail::op_##id,L,R> \
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operator op(L const&, R const&) \
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{ \
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return detail::operator_<detail::op_##id,L,R>(); \
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} \
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}
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BOOST_PYTHON_BINARY_OPERATOR(add, radd, +)
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BOOST_PYTHON_BINARY_OPERATOR(sub, rsub, -)
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BOOST_PYTHON_BINARY_OPERATOR(mul, rmul, *)
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#if PY_VERSION_HEX >= 0x03000000
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BOOST_PYTHON_BINARY_OPERATOR(truediv, rtruediv, /)
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#else
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BOOST_PYTHON_BINARY_OPERATOR(div, rdiv, /)
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#endif
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BOOST_PYTHON_BINARY_OPERATOR(mod, rmod, %)
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BOOST_PYTHON_BINARY_OPERATOR(lshift, rlshift, <<)
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BOOST_PYTHON_BINARY_OPERATOR(rshift, rrshift, >>)
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BOOST_PYTHON_BINARY_OPERATOR(and, rand, &)
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BOOST_PYTHON_BINARY_OPERATOR(xor, rxor, ^)
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BOOST_PYTHON_BINARY_OPERATOR(or, ror, |)
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BOOST_PYTHON_BINARY_OPERATOR(gt, lt, >)
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BOOST_PYTHON_BINARY_OPERATOR(ge, le, >=)
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BOOST_PYTHON_BINARY_OPERATOR(lt, gt, <)
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BOOST_PYTHON_BINARY_OPERATOR(le, ge, <=)
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BOOST_PYTHON_BINARY_OPERATOR(eq, eq, ==)
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BOOST_PYTHON_BINARY_OPERATOR(ne, ne, !=)
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# undef BOOST_PYTHON_BINARY_OPERATOR
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// pow isn't an operator in C++; handle it specially.
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BOOST_PYTHON_BINARY_OPERATION(pow, rpow, pow(l,r))
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# undef BOOST_PYTHON_BINARY_OPERATION
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namespace self_ns
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{
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# ifndef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
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template <class L, class R>
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inline detail::operator_<detail::op_pow,L,R>
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pow(L const&, R const&)
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{
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return detail::operator_<detail::op_pow,L,R>();
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}
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# else
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// When there's no argument-dependent lookup, we need these
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// overloads to handle the case when everything is imported into the
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// global namespace. Note that the plain overload below does /not/
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// take const& arguments. This is needed by MSVC6 at least, or it
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// complains of ambiguities, since there's no partial ordering.
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inline detail::operator_<detail::op_pow,self_t,self_t>
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pow(self_t, self_t)
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{
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return detail::operator_<detail::op_pow,self_t,self_t>();
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}
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template <class R>
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inline detail::operator_<detail::op_pow,self_t,R>
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pow(self_t const&, R const&)
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{
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return detail::operator_<detail::op_pow,self_t,R>();
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}
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template <class L>
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inline detail::operator_<detail::op_pow,L,self_t>
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pow(L const&, self_t const&)
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{
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return detail::operator_<detail::op_pow,L,self_t>();
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}
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# endif
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}
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# define BOOST_PYTHON_INPLACE_OPERATOR(id, op) \
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namespace detail \
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{ \
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template <> \
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struct operator_l<op_##id> \
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{ \
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template <class L, class R> \
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struct apply \
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{ \
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typedef typename unwrap_wrapper_<L>::type lhs; \
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typedef typename unwrap_wrapper_<R>::type rhs; \
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static PyObject* \
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execute(back_reference<lhs&> l, rhs const& r) \
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{ \
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l.get() op r; \
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return python::incref(l.source().ptr()); \
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} \
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}; \
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static char const* name() { return "__" #id "__"; } \
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}; \
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} \
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namespace self_ns \
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{ \
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template <class R> \
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inline detail::operator_<detail::op_##id,self_t,R> \
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operator op(self_t const&, R const&) \
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{ \
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return detail::operator_<detail::op_##id,self_t,R>(); \
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} \
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}
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BOOST_PYTHON_INPLACE_OPERATOR(iadd,+=)
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BOOST_PYTHON_INPLACE_OPERATOR(isub,-=)
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BOOST_PYTHON_INPLACE_OPERATOR(imul,*=)
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BOOST_PYTHON_INPLACE_OPERATOR(idiv,/=)
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BOOST_PYTHON_INPLACE_OPERATOR(imod,%=)
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BOOST_PYTHON_INPLACE_OPERATOR(ilshift,<<=)
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BOOST_PYTHON_INPLACE_OPERATOR(irshift,>>=)
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BOOST_PYTHON_INPLACE_OPERATOR(iand,&=)
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BOOST_PYTHON_INPLACE_OPERATOR(ixor,^=)
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BOOST_PYTHON_INPLACE_OPERATOR(ior,|=)
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# define BOOST_PYTHON_UNARY_OPERATOR(id, op, func_name) \
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namespace detail \
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{ \
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template <> \
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struct operator_1<op_##id> \
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{ \
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template <class T> \
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struct apply \
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{ \
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typedef typename unwrap_wrapper_<T>::type self_t; \
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static PyObject* execute(self_t& x) \
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{ \
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return detail::convert_result(op(x)); \
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} \
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}; \
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static char const* name() { return "__" #id "__"; } \
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}; \
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} \
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namespace self_ns \
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{ \
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inline detail::operator_<detail::op_##id> \
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func_name(self_t const&) \
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{ \
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return detail::operator_<detail::op_##id>(); \
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} \
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}
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# undef BOOST_PYTHON_INPLACE_OPERATOR
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BOOST_PYTHON_UNARY_OPERATOR(neg, -, operator-)
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BOOST_PYTHON_UNARY_OPERATOR(pos, +, operator+)
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BOOST_PYTHON_UNARY_OPERATOR(abs, abs, abs)
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BOOST_PYTHON_UNARY_OPERATOR(invert, ~, operator~)
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#if PY_VERSION_HEX >= 0x03000000
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BOOST_PYTHON_UNARY_OPERATOR(bool, !!, operator!)
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#else
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BOOST_PYTHON_UNARY_OPERATOR(nonzero, !!, operator!)
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#endif
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BOOST_PYTHON_UNARY_OPERATOR(int, long, int_)
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BOOST_PYTHON_UNARY_OPERATOR(long, PyLong_FromLong, long_)
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BOOST_PYTHON_UNARY_OPERATOR(float, double, float_)
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BOOST_PYTHON_UNARY_OPERATOR(complex, std::complex<double>, complex_)
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BOOST_PYTHON_UNARY_OPERATOR(str, lexical_cast<std::string>, str)
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BOOST_PYTHON_UNARY_OPERATOR(repr, lexical_cast<std::string>, repr)
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# undef BOOST_PYTHON_UNARY_OPERATOR
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}} // namespace boost::python
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# ifdef BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP
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using boost::python::self_ns::abs;
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using boost::python::self_ns::int_;
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using boost::python::self_ns::long_;
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using boost::python::self_ns::float_;
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using boost::python::self_ns::complex_;
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using boost::python::self_ns::str;
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using boost::python::self_ns::repr;
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using boost::python::self_ns::pow;
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# endif
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#endif // OPERATORS_DWA2002530_HPP
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