| Re: [eigen] new tutorial on writing functions taking Eigen types as paramters |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] new tutorial on writing functions taking Eigen types as paramters
- From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
- Date: Mon, 16 Aug 2010 11:55:14 +0200
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Hi,
thank you Hauke for your effort on writing this page.
On Thu, Aug 5, 2010 at 3:48 AM, Benoit Jacob <jacob.benoit.1@xxxxxxxxx> wrote:
> - mention Nested (at the end of the page! it's an advanced topic, but
> it's important for advanced users).
I don't think this is an advanced topic, and to be safe, every
argument should be systematically converted to their nested type:
template<typename Derived> void foo(const MatrixBase<Derived>& _x)
{
typename Derived::Nested x (_x);
// use x, not _x
}
For advanced user we should also explain ei_nested which is preferred
if the argument is used more than once. Since ei_nested is mostly
internal, maybe we should also add a slightly higher level public
wrapper....
gael