create tibble with numeric(0) doesn't give same result as NULL column

[xtimbeau]

When creating a tibble with a NULL column no column is created. If the column is a numeric(0) vector, thant the tibble has no line (but the column is created). I may have missed the logic or a previous issue.

library(tibble)
# gives a one line tibble with one column
tibble(a=1, b=NULL)
# gives an empty tibble (surprinsingly and I'd prefer solution 1)
tibble(a=1, b=numeric(0))

[krlmlr]

Thanks, this is expected, and documented (somewhat hidden) in https://vctrs.r-lib.org/reference/theory-faq-recycling.html . Do we need a link from ?tibble to the reference I gave?

I do appreciate that the behavior is different from that of data.frame() . Perhaps this even warrants an explicit mention in ?tibble ?