Re: [Swig-devel] problem with enumerations translations in R

[William S F. <ws...@fu...>]

On 16/08/11 16:26, Ralph Gauges wrote:
> Hi,
>
> I am currently trying to create language bindings for R and I think I
> might have found a bug in the way enums are handled.
>
> Since I don't really know R (yet), I might be wrong, but it looks to me
> that enums from class are created as .__E___CLASSNAME__ENUMERATIONNAME
> where CLASSNAME is the name of the class the enumeration is defined in
> and ENUMERATIONNAME is the name of the enumeration.
> The generated code is able to translate enumeration integers to string
> just fine, but when I try to call a function the takes an enumeration as
> an argument, the backwards translation from string to enum fails because
> R is looking for .__E___p_CLASSNAME__ENUMERATIONNAME instead of
> .__E___CLASSNAME_ENUMERATIONNAME. This is due to (in my opinion)
> incorrect class to the enumToInteger function. This function get a
> string as the second argument in in all these strings, I can see the
> leading "_p" which probably denotes that is is an external pointer. When
> I remove this _p from the string, the translation from string to enum works.
>
> It would be very nice if someone could tell me whether this is a bug in
> SWIG 2.0.4 or if I am making some stupid mistake.
>

I don't know R very well, and tried to recreate this but couldn't, but 
if you give a full example including the R code, I may be able to help.

William