There really isn't such a thing as "a function that looks like an S3
method, but isn't". If it looks like an S3 method, then in the proper
circumstances, it will be called as one.
In your case the function name is levels.no, and it isn't exported. So
if you happen to have an object with a class inheriting from "no", and
you call levels() on it, levels.no might be called.
This will only affect users of your package indirectly. If they have
objects inheriting from "no" and call levels() on them, levels.no will
not be called. But if they pass such an object to one of your package
functions, and that function calls levels() on it, they could end up
calling levels.no(). It all depends on what other classes that object
inherits from.
You can test this yourself. Set debugging on any one of your functions,
then call it in the normal way. Then while still in the debugger set
debugging on levels.no, and create an object using
x <- structure(1, class = "no")
and call levels(x). You should break to the code of levels.no.
That is why the WRE manual says "First, a caveat: a function named
gen.cl will be invoked by the generic gen for class cl, so do not name
functions in this style unless they are intended to be methods."
So probably the best solution (even if inconvenient) is to rename
levels.no to something that doesn't look like an S3 method.
Duncan Murdoch
On 08/05/2023 5:50 a.m., Ulrike Groemping wrote:
Thank your for the solution attempt. However, using the keyword internal
does not solve the problem, the note is still there. Any other proposals
for properly documenting a function that looks like an S3 method, but isn't?
Best, Ulrike
Am 05.05.2023 um 12:56 schrieb Iris Simmons:
You can add
\keyword{internal}
to the Rd file. Your documentation won't show up the in the pdf
manual, it won't show up in the package index, but you'll still be
able to access the doc page with ?levels.no <http://levels.no> or
help("levels.no <http://levels.no>").
This is usually used in a package's deprecated and defunct doc pages,
but you can use it anywhere.
On Fri, May 5, 2023, 06:49 Ulrike Groemping
<ulrike.groemp...@bht-berlin.de> wrote:
Dear package developeRs,
I am working on fixing some notes regarding package DoE.base.
One note refers to the function levels.no <http://levels.no> and
complains that the
function is not documented as a method for the generic function
levels.
Actually, it is not a method for the generic levels, but a standalone
internal function that I like to have documented.
Is there a way to document the function without renaming it and
without
triggering a note about method documentation?
Best, Ulrike
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