c_variadic
The tracking issue for this feature is: #44930
The c_variadic
language feature enables C-variadic functions to be
defined in Rust. They may be called both from within Rust and via FFI.
Examples
#![allow(unused)] #![feature(c_variadic)] fn main() { pub unsafe extern "C" fn add(n: usize, mut args: ...) -> usize { let mut sum = 0; for _ in 0..n { sum += args.arg::<usize>(); } sum } }