Re: [Swig-user] [swig-user] Got some questions about wrapping techniques

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

Laurent Dufréchou wrote:
> Hello,
> I'm trying to use swig to wrap a big C++ librarie. My target language is 
> (for the moment) python.
>  From now, I've managed to wrap some classes without too much problem.
> exactely two :) let's say class A and class B
> My library is compiled (on windows, my current platform for the moment) 
> as a dll. Let's say libDLL.dll
> 
> So I want to ask you first some methodology questions...
> 
> *******************************************************************************
>     Wrapping methodology questions
> *******************************************************************************
> My first question is:
> assuming I've done classA.i and classB.i, I've also done a swig.i that's is:
> 
> /* File : swig_wrapper.i */
> %module libDLL
> %include "std_string.i"
> %include "typemaps.i"
> 
> %apply std::string    {string};
> %apply unsigned int   {u32};
> 
> %include "classA.i"
> %include "classB.i"
> 
> and last I invoke swig on swig.i.
> Is this the good way to do? (I've tied to invoke swig on classA.i and 
> classB.i alone but don't works)
> 
> Second question:
> 
> here is my classA.i:
> /* File : CLASSA.i */
> %{
> #include "CLASSA.h"
> %}
> 
> class PCI165
> {
> public :
>     // Constructor
>     CLASSA            ();
>    
>     // Destructor : close the pci card
>     ~CLASSA            ();
>   
>     //Lot of methods
>     classA...
>     classA...
>     classA...
>     classA...
> 
>     %apply bool *OUTPUT { bool& testOK};
>     void            SelfTestClassA    (bool &testOK);
> }
> 
> Can I do the same but without explicitly write all easily wrappable methods?
> something like:
> /* File : CLASSA.i */
> %{
> #include "CLASSA.h"
> %}
> 
> /* Let's just grab the original header file here */
> %include "PCI165.h"
> 
> but I don't know then where to put %apply bool *OUTPUT { bool& testOK}...
> 
Typemaps must go before SWIG parses the type to which is applies, so put
it somewhere before your %include "PCIl65.h". See Typemaps.html.

> 
> *******************************************************************************
>  some last specific problems ... :)
> *******************************************************************************
> I've got classC (no this wil not got to Z ;) )
> class C
> {
>     static method1();
>     static method2();
>     static method3();
> }
> 
> no constructor... invoking swig says:
> .\interface\SWIG_wrap.cxx(4263) : error C2512: 'ClassC' : aucun 
> constructeur par défaut approprié disponible
> -> no default contructor
> 
> 
> 
> 
> That's true there si no default constructor as all methods are 
> statics... Any idea how I can solve this?
> 
> thanks a lot for all your help!
> 

The above is not valid C++. Correct it and it should work.

William