From wdunlap at tibco.com  Wed Jul 15 21:29:14 2015
From: wdunlap at tibco.com (William Dunlap)
Date: Wed, 15 Jul 2015 12:29:14 -0700
Subject: [Rd] bquote/evalq behavior changed in R-3.2.1
In-Reply-To: <CADT-iToV4pMjoeyNpXRPX_jJNdaD7oqAPr24o+-RfrMv2q+zHw@mail.gmail.com>
References: <CADT-iToV4pMjoeyNpXRPX_jJNdaD7oqAPr24o+-RfrMv2q+zHw@mail.gmail.com>
Message-ID: <CAF8bMcbeggM5=SQLfVnmPMiuBa5ejmOjfhTQfb0kLr_QcKab4Q@mail.gmail.com>

I am curious why you used evalq instead of eval in this code.

Bill Dunlap
TIBCO Software
wdunlap tibco.com

On Wed, Jul 15, 2015 at 11:49 AM, Dayne Filer <dayne.filer at gmail.com> wrote:

> Hello,
>
> I upgraded from 3.1.2 to 3.2.1 and am receiving errors on code that worked
> as I intended previously. Briefly, I am using bquote to generate
> expressions to modify data.table objects within a  function, so I need the
> changes to actually be stored in the given environment. Previously, I used
> code like the following:
>
> test <- list(bquote(x <- 10))
> fenv <- environment()
> rapply(test, evalq, envir = fenv)
>
> Although the code in the example above is much simpler, it shows the
> problem. On 3.1.2 the expression is evaluated and x is stored as 10 in the
> given environment, fenv. In 3.2.1 the code throws an error:
>
> Error in eval(substitute(expr), envir, enclos) : object 'X' not found
>
> I could not find anything in the release notes that would explain this
> change. Changing evalq to eval works in 3.2.1, but eval does not store x in
> the given environment in 3.1.2.
>
> Thanks,
>
> Dayne
>
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>
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[Rd] bquote/evalq behavior changed in R-3.2.1
William Dunlap