Created attachment 247 [details] hg exported patch. May fix complaint in [272]?

It seems that the patch is missing the test case code. I'll add this file over the weekend. John

Created attachment 248 [details] hg exported patch w/test cases. Updated patch

Comment on attachment 248 [details] hg exported patch w/test cases. Review of attachment 248 [details]: ----------------------------------------------------------------- I am not so sure about operator<< and operator>> to indicate bit shifts. We already use << in the comma-initializer: A << 1,2,3,4 means that A should be filled with these values. You also guard the definition with EIGEN_INCLUDE_ARRAY_BIT_SHIFT, so I guess you're not that happy with them either. Perhaps it's better to use .bitShiftLeft() or something like that? On the other hand, operator& and operator| and operator^ seem fine to me. ::: Eigen/src/plugins/ArrayCwiseBinaryOps.h @@ +181,5 @@ > +#define EIGEN_MAKE_SCALAR_CWISE_BINARY_BITOP(OP,FUNCTOR) \ > +template<typename OtherDerived> \ > + inline const CwiseBinaryOp<FUNCTOR<Scalar>, const Derived, const OtherDerived> \ > + operator OP(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const \ > + { return CwiseBinaryOp<FUNCTOR<Scalar>, const Derived, const OtherDerived>(derived(),other.derived()); } There is a EIGEN_MAKE_CWISE_BINARY_OP macro in Macros.h which does something very similar to the above macro. Is it possible to use that instead? ::: Eigen/src/plugins/ArrayCwiseUnaryOps.h @@ +202,5 @@ > > +#define EIGEN_MAKE_SCALAR_CWISE_UNARY_BITOP(OP,FUNCTOR) \ > + inline const CwiseUnaryOp<FUNCTOR<Scalar>, const Derived> \ > + operator OP(const Scalar& scalar) const { \ > + return CwiseUnaryOp<FUNCTOR<Scalar>, const Derived>(derived(), FUNCTOR<Scalar>(scalar)); } Bug 402 proposes the introduction of a EIGEN_MAKE_CWISE_UNARY_OP macro. Would that be helpful here? ::: test/array_bit_ops.cpp @@ +22,5 @@ > +// License and a copy of the GNU General Public License along with > +// Eigen. If not, see <http://www.gnu.org/licenses/>. > + > +#define EIGEN2_SUPPORT > +#define EIGEN_NO_STATIC_ASSERT Why do you need the two #define's above here? @@ +36,5 @@ > +#endif > + > +#ifdef max > +#undef max > +#endif Why do you need to undef the min/max macros?

I think these operators will be very useful, especially, when vectorized. Further operators which should be defined are |=, &=, ^= and ~. And it might be useful to directly allow these operators on any POD type, maybe also a POD type and a boolean type, where the boolean is automatically interpreted as all 1 or all 0 (for true or false, resp.) Or, maybe it would be useful to define types such as internal::boolean<float>, internal::boolean<double>, etc which directly reflect the result of a corresponding comparison operation, and can then efficiently be used for select() operations involving these types. Arbitrary example: ArrayXf A, B; (A>B ^ A>=0.0f).select(B, A);

Shifting operator<< collides with inputting operator<<, other operators are fine. Perhaps we have to shift with <<= and >>= or member functions for symmetry.

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