Le 18/04/2018 à 17:31, Jeff Newmiller a écrit :
as.numeric( NULL ) is not silent, it is very explicit.
Well, written in this way yes. But I was referring more to the content
than to the form. If you write as.numeric(x) and at some run-time point
x become NULL, the code won't stop with an error.
as.numeric( NULL ) is not silent, it is very explicit.
Re this not being a C++ NULL, I don't object to R NULL being used that way (in
fact it may be more sensible to do this than not, but it is not clear that R
core thinks this way).
On April 18, 2018 9:53:12 AM CDT, Serguei Sokol wrote:
>Le
Le 18/04/2018 à 16:15, Jeff Newmiller a écrit :
Regarding:
"Actually, when NULL is provided to where a vector or a matrix is expected just an
error is thrown. So we can hardly imagine that someone would have his program broken or
will be misled if such coercion is introduced."
If all programs
Le 18/04/2018 à 15:59, Dirk Eddelbuettel a écrit :
Could you use XPtr ?
Probably yes, as I could use Nullable<> too. But at what price?
For me, the code would become far less readable.
Serguei.
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Regarding:
"Actually, when NULL is provided to where a vector or a matrix is expected just
an error is thrown. So we can hardly imagine that someone would have his
program broken or will be misled if such coercion is introduced."
If all programs were perfect this would be true, but the ability
Serguei,
(Extra line breaks help readibility on text only mail readers)
On 18 April 2018 at 14:51, Serguei Sokol wrote:
| Le 18/04/2018 à 12:26, Georgi Boshnakov a écrit :
| > I may be missing something here but
| > it doesn't seem right to introduce silent coercion of NULL to vectors, etc.,
| >
Le 18/04/2018 à 13:32, Dirk Eddelbuettel a écrit :
On 18 April 2018 at 10:26, Georgi Boshnakov wrote:
| I may be missing something here but
| it doesn't seem right to introduce silent coercion of NULL to vectors, etc.,
| especially if it would become imposed on everybody using Rcpp/Armadillo.
|
018 10:57
To: Dirk Eddelbuettel
Cc: Rcpp-devel
Subject: Re: [Rcpp-devel] coercion NULL to vector
Le 17/04/2018 à 17:53, Dirk Eddelbuettel a écrit :
On 17 April 2018 at 10:31, Dirk Eddelbuettel wrote:
|
| On 17 April 2018 at 15:09, Serguei Sokol wrote:
...
| | It will automatically coerce NULL to
On 18 April 2018 at 10:26, Georgi Boshnakov wrote:
| I may be missing something here but
| it doesn't seem right to introduce silent coercion of NULL to vectors, etc.,
| especially if it would become imposed on everybody using Rcpp/Armadillo.
| Even the "convenience" of this is questionable.
From: rcpp-devel-boun...@lists.r-forge.r-project.org
[mailto:rcpp-devel-boun...@lists.r-forge.r-project.org] On Behalf Of Serguei
Sokol
Sent: 18 April 2018 10:57
To: Dirk Eddelbuettel
Cc: Rcpp-devel
Subject: Re: [Rcpp-devel] coercion NULL to vector
Le 17/04/2018 à 17:53, Dirk Eddelbuettel a
Le 17/04/2018 à 17:53, Dirk Eddelbuettel a écrit :
On 17 April 2018 at 10:31, Dirk Eddelbuettel wrote:
|
| On 17 April 2018 at 15:09, Serguei Sokol wrote:
...
| | It will automatically coerce NULL to a declared vector type.
| | It's a more primitive solution than Nullable but in many cases
| |
On 17 April 2018 at 10:31, Dirk Eddelbuettel wrote:
|
| On 17 April 2018 at 15:09, Serguei Sokol wrote:
| | Hi,
| |
| | I would like to re-discuss the subject of automatic coercion of
| | NULL to some vector in function parameter list. This old topic was
| | already raised e.g. here
| |
https:/
On 17 April 2018 at 15:09, Serguei Sokol wrote:
| Hi,
|
| I would like to re-discuss the subject of automatic coercion of
| NULL to some vector in function parameter list. This old topic was
| already raised e.g. here
|
https://stackoverflow.com/questions/34718570/rcpp-pass-vector-of-length-0-nu
Hi,
I would like to re-discuss the subject of automatic coercion of
NULL to some vector in function parameter list. This old topic was
already raised e.g. here
https://stackoverflow.com/questions/34718570/rcpp-pass-vector-of-length-0-null-to-cppfunction
To resume, actually a function defined as
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