Re: Parsing command line arguments, predicate error

[Matt Wette]

On 07/08/2018 04:49 AM, Zelphir Kaltstahl wrote:
> Hi!
>
> I decided to take a look at how one can parse command line arguments in
> Guile and was looking for something like argparse in Python. It seems
> that (use-modules (ice-9 getopt-long)) does the job, except that I hit
> one problem and don't know what the mistake I am making is. It seems to
> be connected to the usage of `predicate` in my code.

You probably want to use quasi-quote + unquote:
  `((version ... (predicate ,string-exact-integer?))))

I believe the module (srfi srfi-37), args-fold, is now recommended over 
getopt-long.

Matt