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//@ run-pass
#![feature(c_variadic)]
// In rust (and C23 and above) `...` can be the only argument.
unsafe extern "C" fn only_dot_dot_dot(mut ap: ...) -> i32 {
unsafe { ap.arg() }
}
unsafe extern "C-unwind" fn abi_c_unwind(mut ap: ...) -> i32 {
unsafe { ap.arg() }
}
#[allow(improper_ctypes_definitions)]
unsafe extern "C" fn mix_int_float(mut ap: ...) -> (i64, f64, *const i32, f64) {
(ap.arg(), ap.arg(), ap.arg(), ap.arg())
}
fn main() {
unsafe {
assert_eq!(only_dot_dot_dot(32), 32);
assert_eq!(abi_c_unwind(32), 32);
// Passing more arguments than expected is allowed.
assert_eq!(only_dot_dot_dot(32, 1i64, core::ptr::null::<i32>(), 3.14f64), 32);
let ptr = &14i32 as *const i32;
assert_eq!(mix_int_float(12i64, 13.0f64, ptr, 15.0f64), (12, 13.0, ptr, 15.0));
}
}
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