Re[3]: Directors and passing args by value.

  I'm sorry - I've mistaken. Passing enum to function is ok.
  Returning - this is what doesn't work.

Best regards,
 Kerim                            mailto:warkid@xxxxxxxxx

Tuesday, November 18, 2003, 3:46:36 PM, you wrote:

KB> Hello.

KB>      I've uncommented that "dangerous" typemap;-) It works well except
KB>      it doesn't work with enums.
KB>      What could I do to make it handle them?

KB> Thanks.
KB>  Kerim                            mailto:warkid@xxxxxxxxx

KB> Tuesday, November 18, 2003, 10:28:21 AM, you wrote:

MR>> I actually added the typemap to do this to python.swg many
MR>> months ago, but commented it out with the note "this is rather
MR>> dangerous." ;-)  I probably should have been more explicit at
MR>> that time, since I can't remember now exactly what concerned 
MR>> me about it (other than the possibility of the python method 
MR>> hanging on to references to its arguments).  Maybe there's 
MR>> nothing terribly wrong with that typemap as it stands, or 
MR>> maybe there's another approach that would be safer.  Any 
MR>> typemap/object ownership gurus care to comment?

MR>> Mark


MR>> On Mon, Nov 17, 2003 at 12:08:20PM +0300, Kerim Borchaev wrote:
>>> Hello.
>>> 
>>>    I've checked CVS version and now it seems that directors aren't
>>>    generated for methods with args passed by value. Any plans to
>>>    support it?
>>> 
>>> Best regards,
>>>  Kerim                            mailto:warkid@xxxxxxxxx
>>> 
>>> Thursday, November 13, 2003, 8:16:02 PM, you wrote:
>>> 
>>> MR> Hi Kerim,
>>> 
>>> MR> What version of SWIG are you using?   SWIG cvs parses your
>>> MR> interface without any warnings on my machine, and does the
>>> MR> right thing in the python test.   Note that if you ever get 
>>> MR> warning 461, SWIG will not generate any director stubs for 
>>> MR> the method.  So the result you get in your Python test is 
>>> MR> understandable, and the only question is what is causing the
>>> MR> warning.  
>>> 
>>> MR> Cheers,
>>> MR> Mark
>>> 
>>> 
>>> MR> On Thu, Nov 13, 2003 at 05:55:55PM +0300, Kerim Borchaev wrote:
>>> >> Hello swig,
>>> >> 
>>> >>   SWIG doesn't wrap for directors methods that return objects by
>>> >>   value?
>>> >> 
>>> >> This code:
>>> >> //main.i
>>> >> %module(directors="1") test
>>> >> 
>>> >> %feature("director");
>>> >> %inline %{
>>> >> struct D{
>>> >>     int value;
>>> >>     };
>>> >>     
>>> >> struct C{
>>> >>     virtual ~C(){}
>>> >>     virtual D method(){
>>> >>         D d;
>>> >>         d.value = 7;
>>> >>         return d;
>>> >>         }
>>> >>     };
>>> >>     
>>> >> int getValue(C&o){
>>> >>     D d = o.method();
>>> >>     return d.value;
>>> >>     }
>>> >> %}
>>> >> //////////////////////////
>>> >> 
>>> >> Produces this warning:
>>> >> 
>>> >> main.i:29: Warning(461): Unable to return type D in director method 
>>> >> C::method (s
>>> >> kipping method).
>>> >> 
>>> >> And works like this:
>>> >> 
>>> >> Python 2.3.2 (#49, Oct  2 2003, 20:02:00) [MSC v.1200 32 bit (Intel)] on 
>>> >> win32
>>> >> Type "help", "copyright", "credits" or "license" for more information.
>>> >> >>> import test
>>> >> >>> from test import *
>>> >> >>> class Derived(C):
>>> >> ...     def method(self):
>>> >> ...             d = D()
>>> >> ...             d.value = 13
>>> >> ...             return d
>>> >> ...
>>> >> >>> getValue(Derived())#should return 13
>>> >> 7
>>> >> 
>>> >> 
>>> >> 
>>> >> Best regards,
>>> >>  Kerim                          mailto:warkid@xxxxxxxxx
>>> >> 
>>> >> 
>>> >> _______________________________________________
>>> >> Swig maillist  -  Swig@xxxxxxxxxxxxxxx
>>> >> http://mailman.cs.uchicago.edu/mailman/listinfo/swig
>>> 
>>> 


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