| #![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() { } |