SRFI-37 and short-name option with optional argument

SRFI-37 and short-name option with optional argument

[zimoun]

Dear,

The semantic of short-name option with optional argument is not clear
as the comment says:

http://git.savannah.gnu.org/cgit/guile.git/tree/module/srfi/srfi-37.scm#n58

Let consider that the option '-a, --long-a' has an optional argument
and '-b, --long-b' another option.  Currently, from my tests using
SRFI-37:

  -a X -b     # OK (1)
  -aX -b      # OK (2)
  --long-a -b # OK

  -a -b       # KO (3)

The semantic of (3) is ambiguous, obviously. :-)

So, it seems that the argument is not optional for the short-name
case.  One way to resolve such case is to remove the form (1) when the
short-name '-a' accepts an optional argument.

Does it make sense?


Thank you in advance for your wise advice.

Best regards,
simon

Re: SRFI-37 and short-name option with optional argument

[Linus Björnstam]

I Sony have an answer to your question, but using (ice-9 getopt-long)is usually the library guilers reach for unless they want to install third party libraries: https://www.gnu.org/software/guile/manual/html_node/getopt_002dlong.html#getopt_002dlong

-- 
  Linus Björnstam

On Tue, 12 May 2020, at 22:14, zimoun wrote:
> Dear,
> 
> The semantic of short-name option with optional argument is not clear
> as the comment says:
> 
> http://git.savannah.gnu.org/cgit/guile.git/tree/module/srfi/srfi-37.scm#n58
> 
> Let consider that the option '-a, --long-a' has an optional argument
> and '-b, --long-b' another option.  Currently, from my tests using
> SRFI-37:
> 
>   -a X -b     # OK (1)
>   -aX -b      # OK (2)
>   --long-a -b # OK
> 
>   -a -b       # KO (3)
> 
> The semantic of (3) is ambiguous, obviously. :-)
> 
> So, it seems that the argument is not optional for the short-name
> case.  One way to resolve such case is to remove the form (1) when the
> short-name '-a' accepts an optional argument.
> 
> Does it make sense?
> 
> 
> Thank you in advance for your wise advice.
> 
> Best regards,
> simon
> 
>

Re: SRFI-37 and short-name option with optional argument

[zimoun]

Dear Linus,

On Tue, 12 May 2020 at 22:29, Linus Björnstam
<linus.internet@fastmail.se> wrote:
>
> I Sony have an answer to your question, but using (ice-9 getopt-long)is usually the library guilers reach for unless they want to install third party libraries: https://www.gnu.org/software/guile/manual/html_node/getopt_002dlong.html#getopt_002dlong

Thank you for your answer.  But I really would like to use SRFI-37. :-)

All the best,
simon

Re: SRFI-37 and short-name option with optional argument

[Zelphir Kaltstahl]

Hi Simon!

Perhaps this will help?

https://notabug.org/ZelphirKaltstahl/guile-examples/src/master/command-line-arguments

Regards,
Zelphir

On 5/15/20 5:21 PM, zimoun wrote:
> Dear Linus,
>
> On Tue, 12 May 2020 at 22:29, Linus Björnstam
> <linus.internet@fastmail.se> wrote:
>> I Sony have an answer to your question, but using (ice-9 getopt-long)is usually the library guilers reach for unless they want to install third party libraries: https://www.gnu.org/software/guile/manual/html_node/getopt_002dlong.html#getopt_002dlong
> Thank you for your answer.  But I really would like to use SRFI-37. :-)
>
> All the best,
> simon
>