mirror of https://github.com/rust-lang/rust
50 lines
1.3 KiB
Rust
50 lines
1.3 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 borrow_local_inline() {
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// Not OK to yield with a borrow of a temporary.
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//
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// (This error occurs because the region shows up in the type of
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// `b` and gets extended by region inference.)
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let mut b = #[coroutine] move || {
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let a = &mut 3;
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//~^ ERROR borrow may still be in use when coroutine yields
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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 borrow_local_inline_done() {
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// No error here -- `a` is not in scope at the point of `yield`.
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let mut b = #[coroutine] move || {
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{
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let a = &mut 3;
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}
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yield ();
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};
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Pin::new(&mut b).resume(());
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}
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fn borrow_local() {
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// Not OK to yield with a borrow of a temporary.
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//
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// (This error occurs because the region shows up in the type of
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// `b` and gets extended by region inference.)
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let mut b = #[coroutine] move || {
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let a = 3;
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{
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let b = &a;
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//~^ ERROR borrow may still be in use when coroutine yields
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yield ();
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println!("{}", b);
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}
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};
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Pin::new(&mut b).resume(());
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}
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fn main() {}
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