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

To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [eigen] operator== (and probably others) for 0-sized Eigen-types
From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
Date: Tue, 12 Nov 2013 00:08:33 +0100
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On Mon, Nov 11, 2013 at 11:59 PM, Gael Guennebaud <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

Follow-Ups:
- Re: [eigen] operator== (and probably others) for 0-sized Eigen-types
  - From: Bob Carpenter

References:
- [eigen] operator== (and probably others) for 0-sized Eigen-types
  - From: Daniel.Vollmer
- Re: [eigen] operator== (and probably others) for 0-sized Eigen-types
  - From: Gael Guennebaud

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