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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
# include
# include
# include
# include
# include
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# include
# include
# include
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# include
# include
# include
# include
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
PyObject* convert_result(T const& x) { return converter::arg_to_python
(x).release(); } // Operator implementation template declarations. The nested apply // declaration here keeps MSVC6 happy. template
struct operator_l { template
struct apply; }; template
struct operator_r { template
struct apply; }; template
struct operator_1 { template
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
struct operator_l_inner : operator_l
::template apply
{}; template
struct operator_r_inner : operator_r
::template apply
{}; template
struct operator_1_inner : operator_1
::template apply
{}; // 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
struct binary_op : operator_l
{ template
struct apply : operator_l_inner
{ }; }; // self op R template
struct binary_op_l : operator_l
{ template
struct apply : operator_l_inner
{ }; }; // L op self template
struct binary_op_r : operator_r
{ template
struct apply : operator_r_inner
{ }; }; template
struct unary_op : operator_1
{ template
struct apply : operator_1_inner
{ }; }; // This type is what actually gets returned from operators used on // self_t template
struct operator_ : def_visitor
> { private: template
void visit(ClassT& cl) const { typedef typename mpl::eval_if< is_same
, mpl::if_< is_same
, binary_op
, binary_op_l< id , BOOST_DEDUCED_TYPENAME unwrap_other
::type > > , mpl::if_< is_same
, unary_op
, binary_op_r< id , BOOST_DEDUCED_TYPENAME unwrap_other
::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
\ { \ template
\ struct apply \ { \ typedef typename unwrap_wrapper_
::type lhs; \ typedef typename unwrap_wrapper_
::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
\ { \ template
\ struct apply \ { \ typedef typename unwrap_wrapper_
::type lhs; \ typedef typename unwrap_wrapper_
::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
\ inline detail::operator_
\ operator op(L const&, R const&) \ { \ return detail::operator_
(); \ } \ } BOOST_PYTHON_BINARY_OPERATOR(add, radd, +) BOOST_PYTHON_BINARY_OPERATOR(sub, rsub, -) BOOST_PYTHON_BINARY_OPERATOR(mul, rmul, *) BOOST_PYTHON_BINARY_OPERATOR(div, rdiv, /) 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
inline detail::operator_
pow(L const&, R const&) { return detail::operator_
(); } # 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_
pow(self_t, self_t) { return detail::operator_
(); } template
inline detail::operator_
pow(self_t const&, R const&) { return detail::operator_
(); } template
inline detail::operator_
pow(L const&, self_t const&) { return detail::operator_
(); } # endif } # define BOOST_PYTHON_INPLACE_OPERATOR(id, op) \ namespace detail \ { \ template <> \ struct operator_l
\ { \ template
\ struct apply \ { \ typedef typename unwrap_wrapper_
::type lhs; \ typedef typename unwrap_wrapper_
::type rhs; \ static PyObject* \ execute(back_reference
l, rhs const& r) \ { \ l.get() op r; \ return python::incref(l.source().ptr()); \ } \ }; \ static char const* name() { return "__" #id "__"; } \ }; \ } \ namespace self_ns \ { \ template
\ inline detail::operator_
\ operator op(self_t const&, R const&) \ { \ return detail::operator_
(); \ } \ } 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
\ { \ template
\ struct apply \ { \ typedef typename unwrap_wrapper_
::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_
\ func_name(self_t const&) \ { \ return detail::operator_
(); \ } \ } # 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~) BOOST_PYTHON_UNARY_OPERATOR(nonzero, !!, operator!) 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
, complex_) BOOST_PYTHON_UNARY_OPERATOR(str, lexical_cast
, str) BOOST_PYTHON_UNARY_OPERATOR(repr, lexical_cast
, 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
operators.hpp
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