[Rd] source and textConnection

Duncan Murdoch murdoch at stats.uwo.ca
Fri Oct 23 14:27:06 CEST 2009

On 10/22/2009 7:21 AM, Erich Neuwirth wrote:
> Using todays freshly downloaded compiled version of R-2.10.0 beta
> let me pose this question once again:
>>> myconn<-textConnection("print(11*11)")
>>> source(myconn)
> produces
>> [1] 121
>> Warning message:
>> In source(myconn) : argument 'encoding = "native.enc"' will be ignored
> So I get a warning about a default parameter value I did not use myself.
> This is somewhat strange.
> Up to 2.9.2 this warning did not show up,
> and 2.9.2 also has the encoding parameter.
> source(myconn,encoding="unknown")
> does not produce a warning.
> Will it remain like this?
> I am asking because then I have to adapt a certain mechanism in RExcel.

I spent a little time looking into this yesterday, and it appears to 
have shown up quite a while ago (it was there in July builds, for 
instance).  I will eventually track it down, but certainly not for 2.10.0.

Generally bugs are easier to find when they're fresh, which is why we 
ask people to try out the R-devel builds.  In this case, it's obvious 
how to fix the bug, but I'd rather not do that until I see what the 
change that caused it was intended to do:  I don't want to undo that.

Duncan Murdoch

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