| Re: [eigen] Const referencing of matrix indexes |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Const referencing of matrix indexes
- From: Benoit Jacob <jacob.benoit.1@xxxxxxxxx>
- Date: Fri, 5 Feb 2010 00:23:39 -0500
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In the development branch they definitely return references for all
expressions where that makes sense.
I guess you're talking about 2.0? That's just a design mistake. One of
many reasons for doing Eigen3 ;)
Benoit
2010/2/5 Daniel Stonier <d.stonier@xxxxxxxxx>:
> I just noticed the matrixbase operator[](int index) const (and
> operator()(...) const) both return "const Scaler" rather than "const
> Scaler&". Just out of curiosity, what is the reasoning behind this?
> I've always thought it was standard practice (reading from e.g. the
> c++ faq-lite) and faster for large objects to return the const
> reference.
>
> Regards,
> Daniel.
>
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