Apparently if:
- You are extending an S3 generic
- You are re-exporting that S3 generic
- That generic DOES have
...at the end - That S3 generic adds an argument BETWEEN other existing arguments
- Then your method will get a warning until you update to add that argument
> checking S3 generic/method consistency ... WARNING
foo1:
function(x, new, old, ...)
foo1.character:
function(x, old, ...)
See section ‘Generic functions and methods’ in the ‘Writing R
Extensions’ manual.
Here are the generics https://github.com/DavisVaughan/generictest
It is worth noting that if the ... came earlier in the signature, like
before the new and old arguments, then this would not have been an
issue. See foo5().