[Rd] Active bindings in attached environments

From: Jeffrey Horner <jeffrey.horner_at_gmail.com>
Date: Thu, 05 Nov 2009 09:53:42 -0600


Hi,

Is this expected behavior for active bindings in attached environments, or is this a bug:

> e <- new.env()
> makeActiveBinding('x',function() 'foo',e)
> ls(e)

[1] "x"
> attach(e)
> search()

[1] ".GlobalEnv"        "e"                 "package:graphics"
[4] "package:grDevices" "package:datasets"  "package:utils"
[7] "package:methods"   "Autoloads"         "package:base"

> x

function() 'foo'

Should this print 'foo' ? The following works as I would expect:

> with(e,x)

[1] "foo"

but this doesn't:

> f <- function() x
> f()

function() 'foo'

However, changing the environment of f does:

> environment(f) <- e
> f()

[1] "foo"

Jeff

-- 
http://biostat.mc.vanderbilt.edu/JeffreyHorner

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Received on Thu 05 Nov 2009 - 16:03:47 GMT

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