src/test/run-pass/generator/live-upvar-across-yield.rs

   1 // Copyright 2017 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 #![feature(generators, generator_trait)]
  12
  13 use std::ops::Generator;
  14
  15 fn main() {
  16     let b = |_| 3;
  17     let mut a = || {
  18         b(yield);
  19     };
  20     unsafe { a.resume() };
  21 }