R devel - Mar 2023 - Autocompletion for the new S3 generic @ method?

Hello,

In the current R-devel @ is S3 generic, so we can do things like - for example -
use it to extract matrix rows by name:

    .S3method("@", "mm", function(object, name)
object[name,])
    m <- structure(matrix(rnorm(20), ncol=2),
dimnames=list(paste0("row", 1:10), paste("col", 1:2)),
class="mm")

    m at row1

However, seems like currently it does not support autocompletion.

Wouldn?t it make sense to add a method like .EtaNames() which would provide tab
autocompletions for x@<tab> in the same way current .DollarNames() does
for x$<tab>?

Regards,
Karolis K.

I agree, this is a good idea and would be very helpful in interactive contexts. 

I have a draft patch implementing this feature here:
https://github.com/r-devel/r-svn/pull/122
(Append  ?.patch? to the URL to get a raw patch.)

Regards,
Tomasz
> On Mar 31, 2023, at 2:11 PM, Karolis K <karolis.koncevicius at
gmail.com> wrote:
> 
> Hello,
> 
> In the current R-devel @ is S3 generic, so we can do things like - for
example - use it to extract matrix rows by name:
> 
>    .S3method("@", "mm", function(object, name)
object[name,])
>    m <- structure(matrix(rnorm(20), ncol=2),
dimnames=list(paste0("row", 1:10), paste("col", 1:2)),
class="mm")
> 
>    m at row1
> 
> However, seems like currently it does not support autocompletion.
> 
> Wouldn?t it make sense to add a method like .EtaNames() which would provide
tab autocompletions for x@<tab> in the same way current .DollarNames()
does for x$<tab>?
> 
> Regards,
> Karolis K.
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