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#![feature(generators, generator_trait)]
use std::ops::{GeneratorState, Generator};
use std::cell::Cell;
use std::pin::Pin;
fn borrow_local_inline() {
// Not OK to yield with a borrow of a temporary.
//
// (This error occurs because the region shows up in the type of
// `b` and gets extended by region inference.)
let mut b = move || {
let a = &mut 3;
//~^ ERROR borrow may still be in use when generator yields
yield();
println!("{}", a);
};
Pin::new(&mut b).resume(());
}
fn borrow_local_inline_done() {
// No error here -- `a` is not in scope at the point of `yield`.
let mut b = move || {
{
let a = &mut 3;
}
yield();
};
Pin::new(&mut b).resume(());
}
fn borrow_local() {
// Not OK to yield with a borrow of a temporary.
//
// (This error occurs because the region shows up in the type of
// `b` and gets extended by region inference.)
let mut b = move || {
let a = 3;
{
let b = &a;
//~^ ERROR borrow may still be in use when generator yields
yield();
println!("{}", b);
}
};
Pin::new(&mut b).resume(());
}
fn main() { }
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