pub type d2fcn_p = Option<unsafe extern "C" fn(arg1: c_int, arg2: c_int, arg3: *mut c_double, arg4: *mut c_double, arg5: *mut c_void)>;Aliased Type§
enum d2fcn_p {
None,
Some(unsafe extern "C" fn(i32, i32, *mut f64, *mut f64, *mut c_void)),
}