Macro pyo3::raw_pycfunction

macro_rules! raw_pycfunction {
    ($function_name: ident) => { ... };
}

Returns the function that is called in the C-FFI.

Use this together with #[pyfunction] and types::PyCFunction.

use pyo3::prelude::*;
use pyo3::types::PyCFunction;
use pyo3::raw_pycfunction;

#[pyfunction]
fn some_fun() -> PyResult<()> {
    Ok(())
}

#[pymodule]
fn module(_py: Python, module: &PyModule) -> PyResult<()> {
    let ffi_wrapper_fun = raw_pycfunction!(some_fun);
    let docs = "Some documentation string with null-termination\0";
    let py_cfunction =
        PyCFunction::new_with_keywords(ffi_wrapper_fun, "function_name", docs, module.into())?;
    module.add_function(py_cfunction)
}