Calling function with proto in Rinternals.h

[Thomas Lumley]

On 9 Nov 2002, Timothy H. Keitt wrote:

> On Sat, 2002-11-09 at 11:57, Peter Dalgaard BSA wrote:
> > "Timothy H. Keitt" <tkeitt@mail.utexas.edu> writes:
> >
> > > Quick follow up question -- does reg.finalizer() use the "on exit"
> > > option. (If not, perhaps it could be added as a flag?)
> >
> > It doesn't, but it might be added. Patches will be considered. (But how
> > did you manage to use .Call on
> >
> > void R_RegisterFinalizerEx(SEXP s, SEXP fun, Rboolean onexit)
> >
> > ?? I thought all the arguments had to be SEXP in that interface.)

Horrible things will happen on a 64-bit machine, where Rboolean and SEXP
are different lengths, but on a 32bit machine the argument passing is
likely to work (for suitably restricted definitions of `work').  I'm more
impressed by the fact you could .Call a void function when .Call expects a
SEXP return.

	-thomas

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