Typemap help

[Bob Hood]

I'm having a bit of trouble wrapping my head around this.  I'd appreciate some help.

I've got this typedef:

    class Description : <...>
    {
    public:
        typedef const char* Key;

and then a use of it as:

        bool add_tag(const Key& key, const Parameter& value);

I'm getting errors regarding the argument type:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "PyAsgardLib.py", line 514, in add_tag
    return _PyAsgardLib.Description_add_tag(*args)
TypeError: in method 'Description_add_tag', argument 2 of type 'LWSDK::Description::Key const &'

So, I assume it need a typemap, something like:

    %typemap(in) LWSDK::Description::Key const & {
        $1 = PyString_AsString($input);
    }

    %typemap(out) LWSDK::Description::Key const & {
        $result = PyString_FromString($1);
    }

Internally, SWIG is declaring:

  LWSDK::Description::Key *arg2 = 0 ;

But, the combinations of references and pointers is just confusing me.  What's the correct typemap for this?


------------------------------------------------------------------------------
Come build with us! The BlackBerry® Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9-12, 2009. Register now!
http://p.sf.net/sfu/devconf
_______________________________________________
Swig-user mailing list
Swig-user@...
https://lists.sourceforge.net/lists/listinfo/swig-user

[Bob Hood]

Found it.  Because "const Key&" ends up being "const char **", a
temporary variable is needed on the "in" map:

    %typemap(in) LWSDK::Description::Key const & (char* temp_Key) {
        temp_Key = PyString_AsString($input);
        $1 = (LWSDK::Description::Key*)&temp_Key;
    }

and a dereference on the "out":

    %typemap(out) LWSDK::Description::Key const & {
        $result = PyString_FromString(*($1));
    }


------------------------------------------------------------------------------
Come build with us! The BlackBerry(R) Developer Conference in SF, CA
is the only developer event you need to attend this year. Jumpstart your
developing skills, take BlackBerry mobile applications to market and stay
ahead of the curve. Join us from November 9 - 12, 2009. Register now!
http://p.sf.net/sfu/devconference
_______________________________________________
Swig-user mailing list
Swig-user@...
https://lists.sourceforge.net/lists/listinfo/swig-user