[Rd] reference classes: question on inheritance

[Janko Thyson]

> -----Ursprüngliche Nachricht-----
> Von: r-devel-bounces at r-project.org [mailto:r-devel-bounces at r-
> project.org] Im Auftrag von John Chambers
> Gesendet: Montag, 22. November 2010 18:51
> An: r-devel at r-project.org
> Betreff: Re: [Rd] reference classes: question on inheritance
> 
>  >>
>  >> What am I doing wrong here?
> 
> Not using a recent enough version of R probably (and not telling us
> what
> version you are using).
> 
> The warning (not an error) should not appear in current r-devel or
> 2.12-patched. In other words, works fine for me.
>
> John

Thanks, I didn't even know there existed a patched build as I usually
skipped the x.x.0 versions of R.
But ref classes really seemed worth a try.

Cheers,
Janko

##### SYSTEM INFO #####
Windows XP SP3
R 2.12.0 (patched as of 2010-11-22)
Eclipse 3.6.1 (Helios)
StatET 0.9.1
#####################

> 
> On 11/21/10 3:40 PM, Janko Thyson wrote:
> > Hmm, interesting: it's the virtual class that causes the trouble. If
> a
> > virtual class is a ref class, everything works fine. If it's a
> standard S4
> > class, it results in the error below.
> >
> > Regards,
> > Janko
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: Janko Thyson [mailto:janko.thyson at ku-eichstaett.de]
> >> Gesendet: Montag, 22. November 2010 00:31
> >> An: 'r-devel at r-project. org'
> >> Betreff: reference classes: question on inheritance
> >>
> >> Dear list,
> >>
> >> I have a reference class which should act as a “generic” superclass
> for
> >> other classes. I’ve read the respective section at ?setRefClass and
> put
> >> the name of the superclass to the ‘contains’ argument of an example
> >> subclass (see class defs below). Classnames are set in a way that
> >> shouldn’t result in collation issues (virtual def sourced before
> >> superclass def sourced before subclass). Yet, this  results in the
> >> following error:
> >>
> >> Warnmeldung:
> >> unable to find a consistent ordering of superclasses for class
> >> "Shabubu": order chosen is inconsistent with the superclasses of
> >> "JObject"
> >>
> >> ###### CLASS DEFS #####
> >> setClass("JObjectVirtual")
> >> setRefClass(
> >> 	Class="JObject",
> >> 	fields=list(
> >> 		# GENERIC FIELDS (DON'T CHANGE !!!)
> >> 		.BUFFER="environment",
> >> 		.GENESIS="environment",
> >> 		.HISTORY="environment",
> >> 		.IMAGES="environment",
> >> 		.LOGS="environment",
> >> 		.OPTS="environment",
> >> 		.PLUGINS="environment",
> >> 		.TMP="environment",
> >> 		.UID="character",
> >> 		DATA="data.frame"
> >> 		# /
> >> 	),
> >> 	contains=c("JObjectVirtual"),
> >>   	methods=list(
> >> 		...
> >> 	)
> >> )
> >> setRefClass(
> >> 	Class="Shabubu",
> >> 	fields=list(
> >> 		# CUSTOM FIELDS (ADAPT TO YOUR NEEDS)
> >> 		a="numeric",
> >> 		b="character",
> >> 		c="logical",
> >> 		d="data.frame",
> >> 		e="matrix",
> >> 		f="list",
> >> 		derived.field="function"
> >> 		# /
> >> 	),
> >> 	contains=c("JObject")
> >> )
> >>
> >> Thanks,
> >> Janko
> >
> > ______________________________________________
> > R-devel at r-project.org mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-devel
> >
> 
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