Dear R developers,
Print method for function now tries to open the source file associated
with srcref of the function.
It outputs only the warning, if file cannot be open, and forgets to
print the function definition.
Example:
eval(parse(text = "tf <- function(a){
b <- a^4
b
}", srcfile = srcfile("xxx@17")))
> tf
<srcref: file "xxx@17" chars 1:7 to 4:1>
Warning message:
In file(srcfile$filename, open = "rt", encoding = encoding) :
cannot open file 'xxx@17': No such file or directory
First, the function definition is not printed and I assume it's a bug.
Second, the warning might not be appropriate.
For example ESS with the latest ess-tracebug
(http://code.google.com/p/ess-tracebug/) inserts srcref into the
function on the fly.
Srcfile is of the form file_name@index where index is used to find the
function definition afterwards.
This is useful for two reasons:
-- the visual debugger knows about the reference and jumps through
the function even if the file was not sourced
-- any typos/errors in the code are reported by R with the source
reference, so that the editor can automatically jump to the error
location.
Can please an option to suppress the warnings or even better suppress
the srcfile validity checks be implemented?
Thanks,
Vitalie.
sessionInfo()
R Under development (unstable) (2011-11-15 r57665)
Platform: i686-pc-linux-gnu (32-bit)
locale:
[1] LC_CTYPE=en_US.UTF-8 LC_NUMERIC=C
LC_TIME=en_US.UTF-8
[4] LC_COLLATE=en_US.UTF-8 LC_MONETARY=en_US.UTF-8
LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=C LC_NAME=C
LC_ADDRESS=C
[10] LC_TELEPHONE=C LC_MEASUREMENT=en_US.UTF-8
LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
>
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