Hi R-devel,
I have noticed a discrepancy between is.list() and is(x, ?list?), which I previously believed to be synonymous. On R version 3.5.2 (2018-12-20):
data(iris)
is.list(iris) # TRUE
is(iris, ?list?) # FALSE
Is this discrepancy intentional?
Kind regards,
Shian Su
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