src/test/run-make/coverage/yield.rs

   1 #![feature(generators, generator_trait)]
   2 #![allow(unused_assignments)]
   3
   4 use std::ops::{Generator, GeneratorState};
   5 use std::pin::Pin;
   6
   7 fn main() {
   8     let mut generator = || {
   9         yield 1;
  10         return "foo"
  11     };
  12
  13     match Pin::new(&mut generator).resume(()) {
  14         GeneratorState::Yielded(1) => {}
  15         _ => panic!("unexpected value from resume"),
  16     }
  17     match Pin::new(&mut generator).resume(()) {
  18         GeneratorState::Complete("foo") => {}
  19         _ => panic!("unexpected value from resume"),
  20     }
  21
  22     let mut generator = || {
  23         yield 1;
  24         yield 2;
  25         yield 3;
  26         return "foo"
  27     };
  28
  29     match Pin::new(&mut generator).resume(()) {
  30         GeneratorState::Yielded(1) => {}
  31         _ => panic!("unexpected value from resume"),
  32     }
  33     match Pin::new(&mut generator).resume(()) {
  34         GeneratorState::Yielded(2) => {}
  35         _ => panic!("unexpected value from resume"),
  36     }
  37 }