Re: [eigen] new tutorial on writing functions taking Eigen types as paramters

[Benoit Jacob <jacob.benoit.1@xxxxxxxxx>]

2010/8/4 Hauke Heibel <hauke.heibel@xxxxxxxxxxxxxx>:
> Hi,
>
> caused by my yesterday's naivety I wrote a tutorial on writing
> functions taking Eigen types as parameters.

Great idea, looking forward to it. The way I see it:

 - we need a special topic page on the main base classes (DenseBase,
....) which could give examples of functions taking Eigen objects.
 - we need a very abridged/simplified version of that on the last page
of the tutorial, which should be where users learn what they really
need to know in order to be a little autonomous reading the docs
(which requires them to know a little about the base classes).

The question of how to write a function taking eigen objects as
arguments is one we've answered easily 10 times on the forum. Having
something to link to would be very valuable.

Benoit


>
> There were some surprises and I would appreciate if somebody finds the
> time to read the page and give me some feedback.
>
> Just a short note for Visual Studio users. It was quite a surprise for
> me to see that the following example does not compile on Visual Studio
> 10
>
> struct Base {};
> struct Derived : public Base {};
> void buggy(Base&& b) {}
>
> int main()
> {
>  Derived d;
>  buggy(d);
> }
>
> which means, we cannot yet use rvalue references to circumvent the
> EIGEN_REF_TO_TEMPORARY hack.
>
> - Hauke
>
>
>