diff options
Diffstat (limited to 'third_party/rust/futures/tests/object_safety.rs')
-rw-r--r-- | third_party/rust/futures/tests/object_safety.rs | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/third_party/rust/futures/tests/object_safety.rs b/third_party/rust/futures/tests/object_safety.rs new file mode 100644 index 0000000000..30c892f5e6 --- /dev/null +++ b/third_party/rust/futures/tests/object_safety.rs @@ -0,0 +1,49 @@ +fn assert_is_object_safe<T>() {} + +#[test] +fn future() { + // `FutureExt`, `TryFutureExt` and `UnsafeFutureObj` are not object safe. + use futures::future::{FusedFuture, Future, TryFuture}; + + assert_is_object_safe::<&dyn Future<Output = ()>>(); + assert_is_object_safe::<&dyn FusedFuture<Output = ()>>(); + assert_is_object_safe::<&dyn TryFuture<Ok = (), Error = (), Output = Result<(), ()>>>(); +} + +#[test] +fn stream() { + // `StreamExt` and `TryStreamExt` are not object safe. + use futures::stream::{FusedStream, Stream, TryStream}; + + assert_is_object_safe::<&dyn Stream<Item = ()>>(); + assert_is_object_safe::<&dyn FusedStream<Item = ()>>(); + assert_is_object_safe::<&dyn TryStream<Ok = (), Error = (), Item = Result<(), ()>>>(); +} + +#[test] +fn sink() { + // `SinkExt` is not object safe. + use futures::sink::Sink; + + assert_is_object_safe::<&dyn Sink<(), Error = ()>>(); +} + +#[test] +fn io() { + // `AsyncReadExt`, `AsyncWriteExt`, `AsyncSeekExt` and `AsyncBufReadExt` are not object safe. + use futures::io::{AsyncBufRead, AsyncRead, AsyncSeek, AsyncWrite}; + + assert_is_object_safe::<&dyn AsyncRead>(); + assert_is_object_safe::<&dyn AsyncWrite>(); + assert_is_object_safe::<&dyn AsyncSeek>(); + assert_is_object_safe::<&dyn AsyncBufRead>(); +} + +#[test] +fn task() { + // `ArcWake`, `SpawnExt` and `LocalSpawnExt` are not object safe. + use futures::task::{LocalSpawn, Spawn}; + + assert_is_object_safe::<&dyn Spawn>(); + assert_is_object_safe::<&dyn LocalSpawn>(); +} |