[mlpack] maximum problem size for PrimalDualSolver?

[Ryan Curtin]

On Mon, Sep 02, 2019 at 01:35:18PM -0700, Joe Dinius wrote:
> Ryan,
> 
> Thanks so much for your awesome explanation and for looking into it!  It's
> really amusing (to me anyways) that, just before reading this, I was going
> through the armadillo docs and read the following:
> 
>    - *Can I use the C++11 auto keyword with Armadillo objects and/or
>    expressions?*
>    Use of C++11 *auto* is *not recommended* with Armadillo objects and
>    expressions. Armadillo has a template meta-programming framework which
>    creates lots of short lived temporaries that are not handled by *auto*.
> 
> and *immediately* thought "maybe this is what's happening with my SDP
> code".  HAHAHA.  I will try it out and let you know how it goes.

Ha!  Yeah, hopefully it works.  But even so like I said it's a little
strange for auto to fail in this way, since the type of n_rows should be
easily deducible.

-- 
Ryan Curtin    | "What? Facts?"
ryan at ratml.org |   - Joe Cairo