Re: [eigen] operator== (and probably others) for 0-sized Eigen-types

[Bob Carpenter <carp@xxxxxxxxxxx>]

+1 for this identity-based behavior.

It's the only way to make them consistent under
concatenation.

- Bob

On 11/11/13, 6:08 PM, Gael Guennebaud wrote:
> On Mon, Nov 11, 2013 at 11:59 PM, Gael Guennebaud <gael.guennebaud@xxxxxxxxx <mailto:gael.guennebaud@xxxxxxxxx>> wrote:
>
>     One option could be to make .all() and .any() returns the identity element of the operators && and || respectively,
>     i.e., true and false.
>
>
> this is what octave/matlab do:
>
> octave:6> A = []
> A = [](0x0)
> octave:7> any(A)
> ans = 0
> octave:8> all(A)
> ans =  1
>
>
> gael