50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(generators, generator_trait)]
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use std::ops::{State, Generator};
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use std::cell::Cell;
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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 generator.
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let mut b = 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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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 generator.
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let mut b = 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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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 = || {
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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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b.resume();
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}
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fn main() { }
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