src/test/mir-opt/generator-tiny.rs

   1 //! Tests that generators that cannot return or unwind don't have unnecessary
   2 //! panic branches.
   3
   4 // compile-flags: -Zno-landing-pads
   5
   6 #![feature(generators, generator_trait)]
   7
   8 struct HasDrop;
   9
  10 impl Drop for HasDrop {
  11     fn drop(&mut self) {}
  12 }
  13
  14 fn callee() {}
  15
  16 fn main() {
  17     let _gen = |_x: u8| {
  18         let _d = HasDrop;
  19         loop {
  20             yield;
  21             callee();
  22         }
  23     };
  24 }
  25
  26 // END RUST SOURCE
  27
  28 // START rustc.main-{{closure}}.generator_resume.0.mir
  29 // bb0: {
  30 //     ...
  31 //     switchInt(move _11) -> [0u32: bb1, 3u32: bb5, otherwise: bb6];
  32 // }
  33 // ...
  34 // END rustc.main-{{closure}}.generator_resume.0.mir