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// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
#![feature(generators, generator_trait)]
use std::ops::{GeneratorState, Generator};
use std::cell::Cell;
unsafe fn reborrow_shared_ref(x: &i32) {
// This is OK -- we have a borrow live over the yield, but it's of
// data that outlives the generator.
let mut b = move || {
let a = &*x;
yield();
println!("{}", a);
};
b.resume();
}
unsafe fn reborrow_mutable_ref(x: &mut i32) {
// This is OK -- we have a borrow live over the yield, but it's of
// data that outlives the generator.
let mut b = move || {
let a = &mut *x;
yield();
println!("{}", a);
};
b.resume();
}
unsafe fn reborrow_mutable_ref_2(x: &mut i32) {
// ...but not OK to go on using `x`.
let mut b = || {
let a = &mut *x;
yield();
println!("{}", a);
};
println!("{}", x); //~ ERROR
b.resume();
}
fn main() { }
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