This is another follow-up to the thread from September "Recent changes to
as.complex(NA_real_)".
A test in data.table was broken by the changes for NA coercion to complex;
the breakage essentially comes from
c(NA, 0+1i)
# vs
c(as.complex(NA), 0+1i)
The former is the output we tested against; the latter is essentially (via
coerceVector() in C) what's generated by our data.table::shift()
However, these are now (r85472) different:
Im(c(NA, 0+1i))
# [1] NA 1
Im(c(as.complex(NA), 0+1i))
# [1] 0 1
The former matches the behavior of directly using NA_complex_:
Im(c(NA_complex_, 0+1i))
# [1] NA 1
On R4.3.2, they both match the NA_complex_ behavior:
Im(c(NA, 0+1i))
# [1] NA 1
Im(c(as.complex(NA), 0+1i))
# [1] NA 1
Is this intended behavior, does something need to be updated for c() as
well?
Certainly it's messing with my understanding of how c() behaves, e.g. in ?c
> All arguments are coerced to a common type which is the type of the
returned value
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