what about @link?

[yihui]

I often write \code{\link[pkg]{function_name}} in the documentation, so I would love to see something like @link pkg:function_name in roxygen (when pkg is omitted, we just generate \code{\link{function_name}}). This is similar to @family but allows cross references to other packages. If @link is implemented, we may want it to be automatically put into \seealso{} as well.

Currently it is still not completely clear to me how to register a custom parser like this.

[hadley]

We talked about this a bit over email. I think it needs a slightly different syntax because it would be an inline tag, not a block tag. We couldn't think of any other use cases for inline tags, so we didn't make much progress on it.

[hadley]

An inline tag (borrowing the syntax from javadoc) would look like {@link pkg function}.

[hadley]

Moved to hadley/roxygen3#12