| [eigen] Re: yet another deep change wrt storage orders... |
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- To: eigen <eigen@xxxxxxxxxxxxxxxxxxx>
- Subject: [eigen] Re: yet another deep change wrt storage orders...
- From: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>
- Date: Tue, 9 Mar 2010 00:16:49 -0500
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the fork is there,
https://bitbucket.org/bjacob/eigen-storageorders/
the basic change is done, but i wont merge it back until all the
current issues are resolved.
Benoit
2010/3/8 Benoit Jacob <jacob.benoit.1@xxxxxxxxx>:
> as if we didn't have enough... ever since the RowMajor fixes from
> january, we have quite some instability in the development branch:
> there's always a little thing broken somewhere and fixing it results
> in something else getting broken. Currently, what's broken is certain
> matrix algorithms applied to 1x1 matrices.
>
> To summarize a little discussion that happened today over IRC:
>
> [17:30] <bjacob> the bottom of the problem is that our idea of
> vector-specific functions that work seamlessly for row-vecs and
> col-vecs, detecting 1xN vs. Nx1, completely fails on the 1x1 case
> [17:30] <gael_> yep
> [...]
> [17:40] <gael_> but cannot the RowMajor/ColMajor mean RowVector
> ColumnVector for the vector case ?
>
> With that gael stepped over one of my big taboos so i initially
> psychically rejected his idea... then I realized he was right, this
> actually simplifies a lot of code we have for vectors, and moreover:
>
> [19:26] <bjacob> gael_: wow, here's a very very good reason for it
> too: let's constrain the Options to Matrix, to have the right
> RowMajorBit. This prevents having 2 different vector types that differ
> only by the (unused) RowMajorBit !!
>
> So i'll start that in a fork and report here...
>
> Benoit
>