src/test/ui/issues/issue-76547.rs

   1 // Test for diagnostic improvement issue #76547
   2 // edition:2018
   3
   4 use std::{
   5     future::Future,
   6     task::{Context, Poll}
   7 };
   8 use std::pin::Pin;
   9
  10 pub struct ListFut<'a>(&'a mut [&'a mut [u8]]);
  11 impl<'a> Future for ListFut<'a> {
  12     type Output = ();
  13
  14     fn poll(self: Pin<&mut Self>, _cx: &mut Context) -> Poll<Self::Output> {
  15         unimplemented!()
  16     }
  17 }
  18
  19 async fn fut(bufs: &mut [&mut [u8]]) {
  20     ListFut(bufs).await
  21     //~^ ERROR lifetime mismatch
  22 }
  23
  24 pub struct ListFut2<'a>(&'a mut [&'a mut [u8]]);
  25 impl<'a> Future for ListFut2<'a> {
  26     type Output = i32;
  27
  28     fn poll(self: Pin<&mut Self>, _cx: &mut Context) -> Poll<Self::Output> {
  29         unimplemented!()
  30     }
  31 }
  32
  33 async fn fut2(bufs: &mut [&mut [u8]]) -> i32 {
  34     ListFut2(bufs).await
  35     //~^ ERROR lifetime mismatch
  36 }
  37
  38 fn main() {}