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// run-pass
#![feature(generators, generator_trait)]
use std::ops::Generator;
use std::sync::atomic::{AtomicUsize, ATOMIC_USIZE_INIT, Ordering};
static A: AtomicUsize = ATOMIC_USIZE_INIT;
struct B;
impl Drop for B {
fn drop(&mut self) {
A.fetch_add(1, Ordering::SeqCst);
}
}
fn test() -> bool { true }
fn test2() -> bool { false }
fn main() {
t1();
t2();
}
fn t1() {
let mut a = || {
let b = B;
if test() {
drop(b);
}
yield;
};
let n = A.load(Ordering::SeqCst);
unsafe { a.resume() };
assert_eq!(A.load(Ordering::SeqCst), n + 1);
unsafe { a.resume() };
assert_eq!(A.load(Ordering::SeqCst), n + 1);
}
fn t2() {
let mut a = || {
let b = B;
if test2() {
drop(b);
}
yield;
};
let n = A.load(Ordering::SeqCst);
unsafe { a.resume() };
assert_eq!(A.load(Ordering::SeqCst), n);
unsafe { a.resume() };
assert_eq!(A.load(Ordering::SeqCst), n + 1);
}
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