mirror of https://github.com/rust-lang/rust
44 lines
1.0 KiB
Rust
44 lines
1.0 KiB
Rust
#![feature(coroutines, coroutine_trait, stmt_expr_attributes)]
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use std::cell::Cell;
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use std::ops::{Coroutine, CoroutineState};
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use std::pin::Pin;
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fn reborrow_shared_ref(x: &i32) {
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// This is OK -- we have a borrow live over the yield, but it's of
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// data that outlives the coroutine.
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let mut b = #[coroutine]
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move || {
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let a = &*x;
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yield ();
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println!("{}", a);
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};
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Pin::new(&mut b).resume(());
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}
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fn reborrow_mutable_ref(x: &mut i32) {
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// This is OK -- we have a borrow live over the yield, but it's of
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// data that outlives the coroutine.
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let mut b = #[coroutine]
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move || {
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let a = &mut *x;
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yield ();
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println!("{}", a);
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};
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Pin::new(&mut b).resume(());
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}
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fn reborrow_mutable_ref_2(x: &mut i32) {
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// ...but not OK to go on using `x`.
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let mut b = #[coroutine]
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|| {
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let a = &mut *x;
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yield ();
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println!("{}", a);
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};
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println!("{}", x); //~ ERROR
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Pin::new(&mut b).resume(());
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}
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fn main() {}
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