[R] [External] alist() and missing variables

Ivan Krylov kry|ov@r00t @end|ng |rom gm@||@com
Wed May 4 13:39:21 CEST 2022

В Mon, 2 May 2022 15:07:39 -0500 (CDT)
luke-tierney using uiowa.edu пишет:

> You can detect them as you did here using missing(). This is what the
> byte code compiler implementation does.
> [https://homepage.stat.uiowa.edu/~luke/R/compiler/compiler.pdf]

Thanks for the link! Your notes are very useful. Last time I needed
information on the R_Serialize interface, I also used your notes from

> It's not ideal but it's what we have and not likely to change any time
> soon.

Understood. I'll be using missing() after assignment to detect such
situations, then.

Best regards,

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