From deepayan.sarkar at gmail.com  Thu Mar 15 18:51:51 2012
From: deepayan.sarkar at gmail.com (Deepayan Sarkar)
Date: Thu, 15 Mar 2012 23:21:51 +0530
Subject: [Rd] [ESS] completion in [] (R internal completion fails)
In-Reply-To: <87r4wv33ol.fsf_-_@gmail.com>
References: <87ipi7mtb2.fsf@med.uni-goettingen.de> <87399b4jld.fsf@gmail.com>
	<87r4wv33ol.fsf_-_@gmail.com>
Message-ID: <CADfFDC4gKALGtm-kwKrCmhMzRV=8CWuf96cqyhC0FTPv6S5xbw@mail.gmail.com>

On Wed, Mar 14, 2012 at 3:27 PM, Vitalie Spinu <spinuvit at gmail.com> wrote:
>
> Hello,
>
> I am forwarding this from ESS mailing list, as it's a failure of
> internal R completion system:
>
> This fails:
>
> utils:::.assignLinebuffer('iris[iris$Spec')
> utils:::.assignEnd(15)
> utils:::.guessTokenFromLine()
> utils:::.completeToken()
> utils:::.retrieveCompletions() ## -> [1] "iris[iris$Spec"
>
> This works
>
> utils:::.assignLinebuffer('iris[ iris$Spec') ?# note the space after [
> utils:::.assignEnd(15)
> utils:::.guessTokenFromLine()
> utils:::.completeToken()
> utils:::.retrieveCompletions() ## -> [1] "iris$Species"

This is controlled by

> getOption("rl_word_breaks")
[1] " \t\n\"\\'`><=%;,|&{()}"

Basically [ does not break words into tokens (space does). You can
change this to

options(rl_word_breaks = paste(getOption("rl_word_breaks"), "[]", sep = ""))

But then the following won't work:

> x = list(aaa = list(AAA = 1, BBB = 2))
> x[[1]]$A<TAB>

-Deepayan


> Best,
> Vitalie.
>
>>>>> Andreas Leha <andreas.leha at med.uni-goettingen.de>
>>>>> on Wed, 14 Mar 2012 10:21:37 +0100 wrote:
>
> ?>> Hi all,
> ?>> I am seeing strange behaviour with completion inside [].
>
> ?>> Suppose I have
> ?>> ttt <- data.frame(aaa=1, bbb=1)
> ?>> and I want to run
> ?>> ttt$aaa[ttt$aaa == 1] <- 2
>
> ?>> then completion at this point fails:
> ?>> ttt$aaa[ttt$aa<TAB>
>
> ?>> On the other hand, strangly enough, this works as expected:
> ?>> ttt$aaa[ ttt$aa<TAB>
>
> ?>> Regards,
> ?>> Andreas
>
> ?>> ______________________________________________
> ?>> ESS-help at r-project.org mailing list
> ?>> https://stat.ethz.ch/mailman/listinfo/ess-help
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel



[Rd] [ESS] completion in [] (R internal completion fails)
Deepayan Sarkar