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docopt / docopt.R

Command-line interface description language for R (http://docopt.org)
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Loading required package: methods #20

Closed yasuiniko closed 8 years ago

yasuiniko commented 8 years ago

Hi,

Whenever I import docopt this message pops up: Loading required package: methods. What's the reason to print this message? I understand it's nice to know what R is doing, I would think anything that goes wrong with methods would appear in some sort of traceback.

Maybe this is standard in R and I just haven't heard about it as an infrequent user, but it's a bit annoying to put suppressMessages() around imports. Can you comment on this behavior at all?

Thanks, Niko

edwindj commented 8 years ago

Hi Niko,

I completely agree on that it is a bit annoying to use suppressMessages around imports... For R version <3.3 the methods package had to be loaded for docopt because docopt is implemented using R5 classes. (in an object oriented manner). For previous version of R this would only work when methods is on the search path. (which is default true for interactive R but not for batch R).

I'm planning to fix it, because on R.3.3+, this should no longer be an issue. I alternatively thought of implementing docopt using R6, but that would introduce a new dependency.

Best,

Edwin

yasuiniko commented 8 years ago

Thanks very much Edwin! Since you're planning to fix this in 3.3+, I'll close the issue.