Re: typemap for overloaded contructor

> > Sebastian Haase writes:
> >  > Hi,
> >  > I get
> >  > TypeError: No matching function for overloaded 'new_PriismFile'
> >  >
> >  > I have these constructors:
> >  >   PriismFile(float *img3DStack, int nx, int ny, int nz);
> >  >   PriismFile(unsigned short *img3DStack, int nx, int ny, int nz);
> >  >
> >  > and these typemaps
> >  > %typemap(python,in)   (unsigned short *img3DStack, int nx, int ny,
int
> nz)
> >  > <...>
> >  > %typemap(python,in)   (float *img3DStack, int nx, int ny, int nz)
> <...>
> >  >
> >  > If I comment out  any one of the two contructors  it recognizes it
> fine,
> >  > but as soon as I have more than one contructor I get the error.
> >  >
> >
> > I'm not sure why you are defining typemaps like that.   You do realize
> > that by defining a typemap in the way shown, you are collapsing all of
> > those arguments down so a single scripting language object.  Yes?
> > In any event, the only way to make overloaded methods work with
> > typemaps is to write a bunch of typecheck rules that disambiguate
> > arguments.   To see how to do that, look at the perl5.swg file in the
> > SWIG library.
>
> I convert (float *img3DStack, int nx, int ny, int nz) into one 3D-numarray
> (Numerical Python!)
> object representing the whole data stack of size nx x ny x nz.
> I am looking at python.swg right now, and I found the "Typechecking rules"
> section.
> But what is the actual syntax of  "%typecheck" ? Is it documented anywhere
?
> I was trying :
> %typecheck(SWIG_TYPECHECK_SEB_PYARRAY) float * {
>   $1 = PyArray_Check( $input ) ? 1 : 0;
> }
> But no success yet.  ( SWIG actually complains about a syntax error)
> Can I put "(float *img3DStack, int nx, int ny, int nz)" instead of just
> "float *"  ?

sorry for the confusion - this works now:

%typecheck(SWIG_TYPECHECK_FLOAT) (float *img3DStack, int nx, int ny, int nz)
{
  $1 = PyArray_Check($input) ? ((PyArrayObject*)$input)->descr->type_num ==
tFloat32 : 0;
}
%typecheck(SWIG_TYPECHECK_FLOAT) (unsigned short *img3DStack, int nx, int
ny, int nz) {
  $1 = PyArray_Check($input) ? ((PyArrayObject*)$input)->descr->type_num ==
tUInt16 : 0;
}

But still: where can we find some "text" about typecheck ?

Thanks so much for your answer - have a great day,
Sebastian


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