Missing blob?

[MichaelChirico]

What's the proper way to represent missingness in blob?

is it a NULL element of the list vector?

as_blob(NA)

returns list(NULL)

and

as_blob(list(NULL, as.raw(0)))

returns list(NULL, as.raw(0))

but

as_blob(NA_character_)

returns list(charToRaw("NA"))

Missingness is not mentioned in the help anywhere, nor in the README. Is missingness intended to be supported? Is the as_blob(NA_character_) result a bug?

[MichaelChirico]

(it looks like charToRaw(NA_character_) also returns charToRaw("NA") which seems like a base R bug 😅 -- shouldn't it error?)

[krlmlr]

dput(blob::blob()[NA_integer_])
#> structure(list(NULL), ptype = raw(0), class = c("blob", "vctrs_list_of", 
#> "vctrs_vctr", "list"))

^{Created on 2022-04-08 by the reprex package (v2.0.1)}

The NA_character_ thing is a bug, would you like to submit a PR?

[MichaelChirico]

Looks like it's a vctrs bug?

vctrs::vec_cast(NA_character_, new_blob())
# <blob[1]>
# [1] blob[2 B]

Should the fix go there or here?

NVM. My first time encountering the "double-dispatch" cast thing. A bit hard to predict because it happens at the C level... oh well

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