mirror of https://github.com/rust-lang/rust
62 lines
1.1 KiB
Rust
62 lines
1.1 KiB
Rust
//@ run-pass
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//@ revisions: default nomiropt
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//@[nomiropt]compile-flags: -Z mir-opt-level=0
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#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
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use std::ops::Coroutine;
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use std::pin::Pin;
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use std::sync::atomic::{AtomicUsize, Ordering};
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static A: AtomicUsize = AtomicUsize::new(0);
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struct B;
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impl Drop for B {
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fn drop(&mut self) {
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A.fetch_add(1, Ordering::SeqCst);
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}
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}
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fn test() -> bool { true }
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fn test2() -> bool { false }
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fn main() {
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t1();
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t2();
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}
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fn t1() {
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let mut a = #[coroutine] || {
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let b = B;
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if test() {
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drop(b);
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}
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yield;
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};
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let n = A.load(Ordering::SeqCst);
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Pin::new(&mut a).resume(());
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assert_eq!(A.load(Ordering::SeqCst), n + 1);
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Pin::new(&mut a).resume(());
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assert_eq!(A.load(Ordering::SeqCst), n + 1);
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}
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fn t2() {
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let mut a = #[coroutine] || {
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let b = B;
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if test2() {
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drop(b);
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}
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yield;
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};
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let n = A.load(Ordering::SeqCst);
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Pin::new(&mut a).resume(());
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assert_eq!(A.load(Ordering::SeqCst), n);
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Pin::new(&mut a).resume(());
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assert_eq!(A.load(Ordering::SeqCst), n + 1);
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}
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