Re[2]: Directors and passing args by value.

Hello.

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

Thanks.
 Kerim                            mailto:warkid@xxxxxxxxx

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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