[Rd] pos.to.env and sys.xxx documentation (PR#801)
Peter Dalgaard BSA
02 Jan 2001 21:56:25 +0100
> Full_Name: peter perkins
> Version: 1.2.0
> OS: linuxppc
> Submission from: (NULL) (126.96.36.199)
> i'm assuming that these are shortfalls in the documentation, and not bugs
> in the function themselves.
> 1) the help page for pos.to.env gives two examples:
> the second of these returns NULL which (to me) does not seem to fit
> the description of the function. an explanation of why this seems
> to be a special case would be helpful.
This is correct. The NULL environment is at the end of the search list
(also known as "package:base"). It is a feature not very much loved by
me, but a feature nevertheless. In this environment, objects are bound
directly to symbols rather than stored in a hash structure.
> 3) the sys.xxx help page says:
> The parent of a function evaluation is the environment in which
> the function was called. It is not necessarily one less than the
> frame number of the current evaluation, nor the environment from
> which it is called.
> i think the first sentence ought to read "the environment in which the
> function was declared". unless there is some syntactic subtlety that
> makes the environment "in which [it] was called" different from the one
> "from which [it] is called".
Close, but it's the *second* sentence that needs to be changed...
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