Autocompletion for the new S3 generic @ method?

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.

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.

Thanks, we are discussing the details, but we will definitely add
something along those lines before 4.3.0 is released.

Best,
-Deepayan

On Sun, Apr 2, 2023 at 6:39?PM Tomasz Kalinowski <kalinowskit at gmail.com> wrote:

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.