Re: accept option arguments (even in enum)

Papp Gyozo (VBuster) wrote:
> Hi there,
> 
> long time was passing by since my last mail. It actually means the current version suffices our needs quite very well. Actually it is a good piece of work! Congratulation.

thanks a lot!
this kind of emails always makes me happy :-)

> 
> Now we have run into a problem. gengetopt denies special characters (ie. symbols like '-' or '+') in enum option values and in default values as well suspectedly.
> 
> We would like to have a filter option which filters out/in the specified type of records. We thought it was quite natural to do it in the following way:
> 
> option  "filter"  f 
>     "include or exclude the given type in case of leading '-' or '+', respectively."
>     multiple enum
>     values="-unspecified","-ok","-incompatible","-missing","-other",
>            "+unspecified","+ok","+incompatible","+missing","+other",
>            "problematic","all"
>     default="problematic"
>     optional
> 
> What do you think? gengetopt should enable symbols in enums or should we rephrase our idea? Please note that this option is multiple enum, so the real strength of this approach that custom mixed filter definitions can be described this way:
> 
> --filter=+other,-missing

well I think this would be feasible without any problem!
My only concern is the literals used for the actual C enum values: + and 
  - are not valid characters, so these characters should be translated 
in the C enum...

something like

enum { filter_MINUS_UNSPECIFIED, filter_PLUS_OK, ... }

what do you think?  Or do you have any other suggestion?

cheers
	Lorenzo

-- 
Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
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