[Rcpp-devel] Datetime substraction bug ?

[stat quant]

Thanks a lot for reporting this I would surely have been caught (may be I
am I'll go through code I wrote using this) by this bug.
Posting your workaround would not hurt I think...

Thanks and cheers

2013/3/30 Robin Girard <robin.girard at mines-paristech.fr>

> Thanks you're right  I already wrote it myself with getFractional...
> and indeed that's not really what we should call a "bug" but it took me a
> while to understand that
>
> if date1-date2>0  then date1<date2 ;)
>
> R.
>
>
> ----- Mail original -----
> De: "Dirk Eddelbuettel" <edd at debian.org>
> À: "Robin Girard" <robin.girard at mines-paristech.fr>
> Cc: rcpp-devel at lists.r-forge.r-project.org
> Envoyé: Samedi 30 Mars 2013 00:44:08
> Objet: Re: [Rcpp-devel] Datetime substraction bug ?
>
>
> On 29 March 2013 at 23:37, Robin Girard wrote:
> | Hi List
> |
> | why is it that we have in the Datetime definition
> | (here
> http://dirk.eddelbuettel.com/code/rcpp/html/Date_8cpp_source.html#l00271 )
> |
> | double operator-(const Datetime& d1, const Datetime& d2) { return
> d2.m_dt - d1.m_dt; }
> | bool operator<(const Datetime &d1, const Datetime& d2) { return d1.m_dt
> < d2.m_dt; }
> |
> | I feel there is a contradiction
> | substraction shoulb be d1.m_dt - d2.m_dt;  no ?
>
> It's been a while since I wrote that and I think I followed the difftime()
> convention in R. Or maybe not.  To me d1 comes before d2 in the way the
> arguments are given, so d2 is larger and I want to subtract d1 from d2.
>
> In any event, if it bugs you greatly you are always free to write your own
> function. ;-)
>
> Dirk
>
> |
> | Robin
> |
> | Dr. Girard Robin
> | Chargé de Recherche
> |
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> ERSEI
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