diff options
Diffstat (limited to 'tests/ui/macros/format-args-temporaries-async.rs')
-rw-r--r-- | tests/ui/macros/format-args-temporaries-async.rs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tests/ui/macros/format-args-temporaries-async.rs b/tests/ui/macros/format-args-temporaries-async.rs new file mode 100644 index 000000000..d959329b9 --- /dev/null +++ b/tests/ui/macros/format-args-temporaries-async.rs @@ -0,0 +1,37 @@ +// check-pass +// edition:2021 + +use std::fmt::{self, Display}; +use std::future::Future; +use std::io; +use std::pin::Pin; +use std::task::{Context, Poll}; + +struct AsyncStdout; + +impl AsyncStdout { + fn write_fmt<'a>(&'a mut self, _args: fmt::Arguments) -> WriteFmtFuture<'a, Self> + where + Self: Unpin, + { + WriteFmtFuture(self) + } +} + +struct WriteFmtFuture<'a, T>(&'a mut T); + +impl<'a, T> Future for WriteFmtFuture<'a, T> { + type Output = io::Result<()>; + fn poll(self: Pin<&mut Self>, cx: &mut Context) -> Poll<Self::Output> { + unimplemented!() + } +} + +async fn async_main() { + let _write = write!(&mut AsyncStdout, "...").await; + let _writeln = writeln!(&mut AsyncStdout, "...").await; +} + +fn main() { + let _ = async_main; +} |