Re: Rcomplex

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Subject: Re: Rcomplex
From: Prof Brian D Ripley (ripley@stats.ox.ac.uk)
Date: Thu 16 Dec 1999 - 01:49:27 EST


Message-ID: <Pine.GSO.4.05.9912151542310.20445-100000@auk.stats>

On Wed, 15 Dec 1999, Paul Gilbert wrote:

> o `Rcomplex' is preferred to `complex' (a future reserved word
> in C) for R complex objects passed to C.
>
> I'm a bit confused here. Is "complex" or "Rcomplex" the future reserved
> word in C (I thought "complex" already was, but I'm not a C programmer)

complex is not currently reserved, but it is in the draft stanadrd
revision. (I might see the confusion. It does not say `to be passed to C',
and it means after passing to C.)

> and is this because R storage modes should or should not have names
> corresponding to C reserved words? I presume this means I should use
> something like
>
> storage.mode(z) <- if (is.R()) "Rcomplex" else "complex"

No! Use complex in interpreted R code and Rcomplex in C.

We will shortly have compatibility headers for the C code that covers this.

Foreign.Rd has not yet been updated to reflect this change, but
the Writing R Extensions manual has.

Brian

-- 
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 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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