[SciPy-Dev] sparsetools C++ code size

[Evgeni Burovski]

On Wed, Mar 5, 2014 at 4:39 PM, Robert Kern <robert.kern at gmail.com> wrote:
> On Wed, Mar 5, 2014 at 4:33 PM, Jaime Fernández del Río
> <jaime.frio at gmail.com> wrote:
>
>> I am asking out of ignorance here: if you have a templated C++ function, how
>> do you go about wrapping it to be accessible from Python?
>
> You write an `extern "C"` function that calls an explicitly
> instantiated version of the templated function.
>
> extern "C" {
>
> PyObject* my_python_function(PyObject* self, PyObject* args)
> {
>     double *input_array;
>     double *output_array;
>     PyObject *py_output_array;
>
>     input_array = ...
>     output_array = ...
>
>     my_templated_function<double>(input_array, output_array);
>
>     py_output_array = PyArray_...(output_array);
>     return py_output_array
> }
>
> }
>
> --
> Robert Kern
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More ignorance here: what is the status of using Cython for wrapping
templated C++ code?
I mean,  http://docs.cython.org/src/userguide/wrapping_CPlusPlus.html

Evgeni