R-exts.pdf discribes S3method a little bit. But I want to understand
more on how it is called, implemented and when to use it.
I don't find it in an R session. But I see S3method() in some NAMESPACE files.
> S3method
Error: object 'S3method' not found
> ?S3method
No documentation for 'S3method' in specified packages and libraries:
you could try '??S3method'
I don't understand why S3method is necessary.
My understanding is that we can always use
print.foo(<something) {<function body>} # and appropriate exporting
to replace
S3method(print, foo)
, right?
Or I misunderstand something?
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