The lattice package has a namespace, so it has a .onLoad function. I
also keep around a .First.lib, for use during development, when I
temporarily delete the NAMESPACE file.
When using a namespace, I used to comment out the .First.lib function.
However, that seems unnecessary since it's not executed anyway. Is this
intended (and dependable) behaviour?
(If so, this should probably be mentioned in ?library, which currently
says
'.First.lib' is called when a package is loaded; '.Last.lib' is
called when a package is detached.
without any mention of namespaces).
Deepayan
.First.lib and namespaces
2 messages · Deepayan Sarkar, Brian Ripley
On Thu, 2 Sep 2004, Deepayan Sarkar wrote:
The lattice package has a namespace, so it has a .onLoad function. I also keep around a .First.lib, for use during development, when I temporarily delete the NAMESPACE file. When using a namespace, I used to comment out the .First.lib function. However, that seems unnecessary since it's not executed anyway. Is this intended (and dependable) behaviour?
Yes.
(If so, this should probably be mentioned in ?library, which currently
says
'.First.lib' is called when a package is loaded; '.Last.lib' is
called when a package is detached.
without any mention of namespaces).
[.Last.lib is called when a package with a namespace is detached.]
Indeed, but see `Writing R Extensions', under `Load hooks', and
Various @R{} functions in a package can be used to initialize and clean
up. For packages without a name space, these are @code{.First.lib} and
@code{.Last.lib}. (For packages with a name space, @xref{Load hooks}.)
I'll update library.Rd to mention this and user hooks.
Brian D. Ripley, ripley@stats.ox.ac.uk Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272866 (PA) Oxford OX1 3TG, UK Fax: +44 1865 272595