Support System.Numerics.Complex

[brechtvb]

Is it possible to support System.Numerics.Complex

Today that has to be done through a [float float] compound, correct?

[LiorBanai]

@brechtvb , Yeah I don't think H5 data type has native complex type. It will have to be split into 2 fields.

[LiorBanai]

https://mathematica.stackexchange.com/questions/63983/hdf5-and-complex-numbers

[brechtvb]

Indeed, there is no other way.

An ugly hack could be provided through issue #236:

unsafe public void Write(Guid guid, ReadOnlySpan<double> valuePath, ReadOnlySpan<Complex> cdata, string groupName)
    {
        var groupId = h5.Hdf5.CreateGroupRecursively(hfile, loc(guid, valuePath));

        fixed (Complex* cptr = cdata)
        {
            double* dptr = (double*)cptr;

            var ddata = new ReadOnlySpan<double>(dptr, cdata.Length * 2);
            
            var ds = h5.Hdf5.WriteDatasetFromArray<double>(groupId, groupName, ddata.ToArray());
        }
        
    }