R devel - Mar 2019 - Spurious warning from checkReplaceFuns about a non-replacement function

If a function contains the pattern `<-` it is (with a few exceptions)
deemed to be a replacement function and in particular must have second
argument `value` to pass R CMD check.

Consider the function %<->% or any other function containing <- within
grapes. I claim that such functions should not be considered
replacement functions and thus the R CMD check should not require its
second argument to be `value`.

Recommend in the function tools::checkReplaceFuns

grep("<-", objects_in_code,
        value = TRUE)

be changed to

grep("<-$", objects_in_code,
        value = TRUE)


Hugh.

>>>>> Hugh Parsonage writes:
> If a function contains the pattern `<-` it is (with a few exceptions)
> deemed to be a replacement function and in particular must have second
> argument `value` to pass R CMD check.
> Consider the function %<->% or any other function containing <-
within
> grapes. I claim that such functions should not be considered
> replacement functions and thus the R CMD check should not require its
> second argument to be `value`.
I just committed c76224 which drops %xxx% binops from the list of
(probable) replacement functions.

Thanks for spotting this!

Best
-k
> Recommend in the function tools::checkReplaceFuns
> grep("<-", objects_in_code,
>         value = TRUE)
> be changed to
> grep("<-$", objects_in_code,
>         value = TRUE)
> Hugh.
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