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 *"  ?

Thanks for your help,
Sebastian



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