fusion: work of 4 sequences at the same time
Hi,
I am trying to apply fusion::for_each on a sequence, but inside the unary
functor applied to each element, I need to know the index of the element in
question, because I need to extract elements with the same index from other
sequences.
fusion::vector<...> fseq1;
fusion::vector<...> fseq2;
fusion::vector<...> fseq3;
fusion::vector<...> fseq4;
fusion::for_each( fseq1, functor<...>(fseq2, fseq3, fseq4) );
template
-----Original Message----- From: boost-users-bounces@lists.boost.org [mailto:boost-users- bounces@lists.boost.org] On Behalf Of Rutger ter Borg Sent: 18 February 2010 18:09 To: boost-users@lists.boost.org Subject: Re: [Boost-users] fusion: work of 4 sequences at the same time
Hicham Mouline wrote:
I could use boost::fusion::find to get an iterator and then get its
index,
but this doesn not look clean,
Any ideas,
I would recommend to take a look at the zip_view stuff.
Cheers,
Rutger
Will do, thanks, In the mean time, the fusion::vector4<> that fusion::zip manufactures is made of const-ref of the types of the 4 sequences. To change 1 of the sequences, I need to const_cast away the constness. I guess zip_view addresses this constness issue, Rds,
participants (2)
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Hicham Mouline -
Rutger ter Borg