| Re: [eigen] Passing result of block() as non-const reference-to-matrix? |
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- To: eigen@xxxxxxxxxxxxxxxxxxx
- Subject: Re: [eigen] Passing result of block() as non-const reference-to-matrix?
- From: Gael Guennebaud <gael.guennebaud@xxxxxxxxx>
- Date: Fri, 9 Jul 2010 19:27:19 +0200
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On Fri, Jul 9, 2010 at 7:03 PM, Benoit Jacob <jacob.benoit.1@xxxxxxxxx> wrote:
>> It's a pity that there is no clean solution that is portable to pre-C++0x. I still don't quite get that it does work as expected when I pass a const Block to a const Matrix & -- it is not clear for me why that /does/ work.
>
> That does /not/ work :-)
that does work ;) The block expression will be evaluated into a
temporary Matrix object. (unless the Matrix<> type is templated as
well but this is not the case in his example)
gael