TLDR: This is quite technical, still somewhat important:
1) R 4.0.0 will become a bit more coherent: a matrix is an array
2) Your package (or one you use) may be affected.
> Martin Maechler
> on Fri, 15 Nov 2019 17:31:15 +0100 writes:
> Pages, Herve
> on
Dear all,
`body<-` removes the class of the input function, it's undocumented and I
not what I would expect.
``` r
foo <- function() {1}
class(foo) <- "bar"
attr(foo, "class")
#> [1] "bar"
body(foo) <- 2
attr(foo, "class")
#> NULL
```
Best regards,
Antoine
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