This is a bug in R: it either should prohibit the attaching of attributes to things of class "name" or should make it so that attachment of an attribute doesn't have such a global effect.
A more direct example of the problem is: > attributes(quote(some.name)) NULL > bar <- structure(quote(some.name), someAttribute="someAttribute's value") > attributes(quote(some.name)) $someAttribute [1] "someAttribute's value" I reported a similar problem to R-devel in March of 2010 under the subject line "symbol name caching bug: attributes get tied to symbol names". The consensus then seemed to be that prohibiting attributes on things of class "name" was the way to go. Bill Dunlap Spotfire, TIBCO Software wdunlap tibco.com > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On > Behalf Of Kamil Barton > Sent: Monday, November 21, 2011 8:31 AM > To: r-help@r-project.org > Subject: [R] Weird R's behaviour with a quoted name > > Can someone explain why the following happens? > --- > :> quote(some.name) > some.name > :> bar <- structure(quote(some.name), class = "foo") > :> quote(some.name) > Error in print(some.name) : object 'some.name' not found > :> bar <- quote(some.name) > :> quote(some.name) > Error in print(some.name) : object 'some.name' not found > :> bar <- as.name("some.name") > :> quote(some.name) > some.name > --- > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
